Claims:
1. A system for increasing efficiency of a furnace of hot strip mill, said system comprising:
a set of sensors disposed in furnace of hot strip mill, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace;
a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and
one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal,
wherein the control unit configured to control flow of air and oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
2. The system as claimed in claim 1, wherein the system comprises a display unit operatively coupled with the control unit, and wherein the display unit configured to display in real-time the detected amount of oxygen in the flue gas.
3. The system as claimed in claim 1, wherein the pre-defied temperature of the furnace is at least 1300 degree Celsius.
4. The system as claimed in claim 1, wherein the control unit configured to maintain the oxygen content between 0.5% to 5% of the total flue gas passing through furnace.
5. A method for increasing efficiency of a furnace of hot strip mill, said method comprising:
detecting, using a set of sensors, amount of oxygen present in the flue gas passing through the furnace of hot strip mill;
generating, by a control unit, a control signal based on the detected amount of oxygen; and
controlling, using one or more control valves, flow of air and oxygen to the furnace based on the generated control signal,
wherein the control unit configured to control flow of air and oxygen using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
6. The method as claimed in claim 5, wherein the method comprises: displaying in real-time the detected amount of oxygen using a display unit.
7. A furnace of hot strip mill, said furnace comprising:
an inlet to receive any or a combination of air, oxygen and fuel;
a set of sensors disposed at an outlet of the furnace, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace;
a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and
one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal,
wherein the control unit configured to control flow of the air and the oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.

, Description:
TECHNICAL FIELD
[01] The present disclosure relates to a furnace. More particularly, the present disclosure relates to a method and system for increasing efficiency of a furnace of a hot strip mill.

BACKGROUND
[02] The background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[03] Hot Strip Mill of Rourkela Steel Plant produces Hot Roll Coil for internal as well as external customer. Hot Strip Mill has two Furnaces having capacity of production 5000 Tons/day of Hot Roll Coil.
[04] Slabs from Continuous Coasting Machine I & II of Steel Melting Shop – I &II, passing through the Furnaces of Hot Strip Mill are subjected to heating at high temperature of 13000 cg. Mixed gas required for heating the two Furnaces should have proper air/gas ratio with Oxygen content in flue gas in 1-2 % range. If proper air/gas ratio not maintained, the same will hamper temperature heating of Slabs. If the slabs are not properly heated it will cause scale formation due to Oxidation and consequent breakdown of Furnace and production of the entire Mill.
[05] To ensure proper air/gas ratio, the Operator on duty has to monitor visually from his experience. This ideal situation totally depends on the alertness and experience of the Operator. However, the proper air/gas ratio position could not be ensured with 100% perfection. Hence, there have been failures leading to scale formation and consequent breakdowns.
[06] Energy Management Department checks the fuel gas sample and reports to Hot Strip Mill on fuel efficiency of the two Furnaces. After checking the un-burnt fuel, if it is observed O2% more than 5%, this causes oxidation with more scale generation. If O2 % is less than 0.5% then fuel gets wasted.
[07] There is therefore a need in the art to provide a method and system for increasing efficiency of a furnace of a hot strip mill that overcome the above-mentioned and other limitations of the existing solutions and utilize techniques, which are robust, accurate, fast, efficient, cost effective and simple.

OBJECTS OF THE PRESNET DISCLOSURE
[08] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[09] It is an object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill.
[010] It is another object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill that produce a high-quality hot roll coil.
[011] It is another object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill that helps reduce wastage of fuel.
[012] It is another object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill that protect damage of costly refractory of chimney and recuperatorpipe.
[013] It is another object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill that is eco-friendly as the unburnt fuel is reduced that is hazardous to environment.
[014] It is another object of the present disclosure to provide to a method and system for increasing efficiency of a furnace of a hot strip mill that is cost effective and easy to implement.

SUMMARY
[015] The present disclosure relates to a furnace. More particularly, the present disclosure relates to a method and system for increasing efficiency of a furnace of a hot strip mill.
[016] An aspect of the present disclosure related to a system for increasing efficiency of a furnace of hot strip mill. The disclosed system comprises: a set of sensors disposed in furnace of hot strip mill, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace; a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal, wherein the control unit configured to control flow of air and oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[017] In an embodiment, the system comprises a display unit operatively coupled with the control unit, and wherein the display unit configured to display in real-time the detected amount of oxygen in the flue gas.
[018] In an embodiment, the pre-defied temperature of the furnace is at least 1300 degree Celsius.
[019] In an embodiment, the control unit configured to maintain the oxygen content between 0.5% to 5% of the total flue gas passing through furnace.
[020] Another aspect of the present disclosure related to a method for increasing efficiency of a furnace of hot strip mill. The disclosed method comprises: detecting, using a set of sensors, amount of oxygen present in the flue gas passing through the furnace of hot strip mill; generating, by a control unit, a control signal based on the detected amount of oxygen; and controlling, using one or more control valves, flow of air and oxygen to the furnace based on the generated control signal, wherein the control unit configured to control flow of air and oxygen using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[021] In an embodiment, the method comprises: displaying in real-time the detected amount of oxygen using a display unit.
[022] Yet another aspect of the present disclosure relates to a furnace of hot strip mill, the furnace comprising: an inlet to receive any or a combination of air, oxygen and fuel; a set of sensors disposed at an outlet of the furnace, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace; a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal, wherein the control unit configured to control flow of the air and the oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.

BRIEF DESCRIPTION OF THE DRAWINGS
[023] In the figures, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[024] FIG. 1 illustrates an exemplary block diagram representation of a system for increasing efficiency of a furnace of a hot strip mill in accordance with an embodiment of the present disclosure.
[025] FIG. 2 illustrates an exemplary flow diagram representation of process for controlling temperature of a furnace of a hot strip mill in accordance with an embodiment of the present disclosure.
[026] FIG. 3 illustrates an exemplary flow diagram representation of process for generating a control signal in accordance with an embodiment of the present disclosure.
[027] FIG. 4A illustrates an exemplary flow diagram representation of process for controlling flow of gas to the furnace in accordance with an embodiment of the present disclosure.
[028] FIG. 4B illustrates an exemplary flow diagram representation of process for controlling flow of air to the furnace in accordance with an embodiment of the present disclosure.
[029] FIG. 5 illustrates an exemplary flow diagram illustrating a process for increasing efficiency of the furnace in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[030] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[032] Embodiments of the present invention include various steps, which will be described below. The steps may be performed by hardware components or may be embodied in machine-executable instructions, which may be used to cause a general-purpose or special-purpose processor programmed with the instructions to perform the steps. Alternatively, steps may be performed by a combination of hardware, software, and firmware and/or by human operators.
[033] Various methods described herein may be practiced by combining one or more machine-readable storage media containing the code according to the present invention with appropriate standard computer hardware to execute the code contained therein. An apparatus for practicing various embodiments of the present invention may involve one or more computers (or one or more processors within a single computer) and storage systems containing or having network access to computer program(s) coded in accordance with various methods described herein, and the method steps of the invention could be accomplished by modules, routines, subroutines, or subparts of a computer program product.
[034] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[035] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[036] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.
[037] Thus, for example, it will be appreciated by those of ordinary skill in the art that the diagrams, schematics, illustrations, and the like represent conceptual views or processes illustrating systems and methods embodying this invention. The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing associated software. Similarly, any switches shown in the figures are conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the entity implementing this invention. Those of ordinary skill in the art further understand that the exemplary hardware, software, processes, methods, and/or operating systems described herein are for illustrative purposes and, thus, are not intended to be limited to any particular named element.
[038] Embodiments of the present invention may be provided as a computer program product, which may include a machine-readable storage medium tangibly embodying thereon instructions, which may be used to program a computer (or other electronic devices) to perform a process. The term “machine-readable storage medium” or “computer-readable storage medium” includes, but is not limited to, fixed (hard) drives, magnetic tape, floppy diskettes, optical disks, compact disc read-only memories (CD-ROMs), and magneto-optical disks, semiconductor memories, such as ROMs, PROMs, random access memories (RAMs), programmable read-only memories (PROMs), erasable PROMs (EPROMs), electrically erasable PROMs (EEPROMs), flash memory, magnetic or optical cards, or other type of media/machine-readable medium suitable for storing electronic instructions (e.g., computer programming code, such as software or firmware).A machine-readable medium may include a non-transitory medium in which data may be stored and that does not include carrier waves and/or transitory electronic signals propagating wirelessly or over wired connections. Examples of a non-transitory medium may include, but are not limited to, a magnetic disk or tape, optical storage media such as compact disk (CD) or digital versatile disk (DVD), flash memory, memory or memory devices. A computer-program product may include code and/or machine-executable instructions that may represent a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class, or any combination of instructions, data structures, or program statements. A code segment may be coupled to another code segment or a hardware circuit by passing and/or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, etc. may be passed, forwarded, or transmitted via any suitable means including memory sharing, message passing, token passing, network transmission, etc.
[039] Furthermore, embodiments may be implemented by hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or microcode, the program code or code segments to perform the necessary tasks (e.g., a computer-program product) may be stored in a machine-readable medium. A processor(s) may perform the necessary tasks.
[040] Systems depicted in some of the figures may be provided in various configurations. In some embodiments, the systems may be configured as a distributed system where one or more components of the system are distributed across one or more networks in a cloud computing system.
[041] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[042] All methods described herein may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[043] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[044] The present disclosure relates to a furnace. More particularly, the present disclosure relates to a method and system for increasing efficiency of a furnace of a hot strip mill.
[045] An aspect of the present disclosure related to a system for increasing efficiency of a furnace of hot strip mill. The disclosed system comprises: a set of sensors disposed in furnace of hot strip mill, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace; a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal, wherein the control unit configured to control flow of air and oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[046] In an embodiment, the system comprises a display unit operatively coupled with the control unit, and wherein the display unit configured to display in real-time the detected amount of oxygen in the flue gas.
[047] In an embodiment, the pre-defied temperature of the furnace is at least 1300 degree Celsius.
[048] In an embodiment, the control unit configured to maintain the oxygen content between 0.5% to 5% of the total flue gas passing through furnace.
[049] Another aspect of the present disclosure related to a method for increasing efficiency of a furnace of hot strip mill. The disclosed method comprises: detecting, using a set of sensors, amount of oxygen present in the flue gas passing through the furnace of hot strip mill; generating, by a control unit, a control signal based on the detected amount of oxygen; and controlling, using one or more control valves, flow of air and oxygen to the furnace based on the generated control signal, wherein the control unit configured to control flow of air and oxygen using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[050] In an embodiment, the method comprises: displaying in real-time the detected amount of oxygen using a display unit.
[051] Yet another aspect of the present disclosure relates to a furnace of hot strip mill, the furnace comprising: an inlet to receive any or a combination of air, oxygen and fuel; a set of sensors disposed at an outlet of the furnace, the set of sensors configured to detect amount of oxygen present in the flue gas passing through the furnace; a control unit operatively coupled with the set of sensors, the control unit configured to generate a control signal based on the detected amount of oxygen; and one or more actuators coupled with corresponding control valve, each of the one or more actuators configured to control the corresponding control valve based on the generated control signal, wherein the control unit configured to control flow of the air and the oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[052] FIG. 1 illustrates an exemplary block diagram representation of a system for increasing efficiency of a furnace of a hot strip mill in accordance with an embodiment of the present disclosure.
[053] In an embodiment, a system 100 for increasing efficiency of a furnace 106 of hot strip mill can include set of sensors 104. The set of sensors can be disposed in the furnace 106. The set of sensors 104 can be adapted to sense amount of oxygen present in flue gas, the set of more sensors 104 can include a detector and the like to sense amount of oxygen present in the flue gas.
[054] In an embodiment, the system 100 can include a converter 102. The converter 102 can be operatively coupled with the set of sensors. The converter 102 can be configured to receive the sensed amount of oxygen and convert the convert the received sensed amount of oxygen to value of oxygen present in the flue gas. The value of oxygen present in the flue gas be calculated in terms of percentage of total amount of air.
[055] In an embodiment, the system 100 can include a control unit 108. The control unit can be operatively coupled with any or a combination of the set of sensors 104 and the converter 106. The control unit 108 can be adapted to receive the detected value of oxygen present in the flue gas and based on the detected value of oxygen generates a control signal.
[056] In an embodiment, the system 100 can include a display unit 110. The display unit 110 can be operatively coupled with the control unit 108. The display unit 110 can be used to display in real-time value of oxygen detected and the like.
[057] In an embodiment, the system 100 can include one or more actuators (not shown) coupled with corresponding valve. The system 100 can include the one or more valve such that the one or more actuators can be used to control opening and closing of the one or more valves. The one or more valves can be used to control flow of any or a combination of air, oxygen and fuel to the furnace 106.
[058] It would be appreciated by the person skilled in the art that the objective of the invention has been to ensure Oxygen % in flue gas in the desired and required range of 1-2 %.On-line installation of Oxygen Analyzer would help maintain required oxygen percent in flue gas thereby maintain the heating temperature of Furnaces so as to produce quality Hot Roll Coil, elimination of scale generation and the hazards, cost and time associated with removal of scale, protect damage of costly refractory of chimney and recuperator pipe, and the un-bunt fuel also a threat to severe environmental problem.
[059] FIG. 2 illustrates an exemplary flow diagram representation of process for controlling temperature of a furnace of a hot strip mill in accordance with an exemplary embodiment of the present disclosure.
[060] In an embodiment, block 202 pertains to a temperature controller. The temperature controller can receive temperature set value and temperature processed value and further based on requirement can generate a manipulated temperature control value that can be used to control temperature of furnace.
[061] In an embodiment, block 204 pertains to comparison. The manipulated control value and the set value of heat can be compared to determine heat demand as required for the furnace. In an embodiment, block 206 pertains to processing of ratio controller program for air by the control unit. In an embodiment, block 208 pertains to cascade mode of operation wherein based on the processed ratio controller program for air by the control unit air set value is generated.
[062] In an embodiment, block 210 pertains to automatic mode of operation wherein the operator can manually set the control value of air. In an embodiment, the set value of air can be generated by any or a combination of automatic mode or cascade mode of operation.
[063] In an embodiment, block 212 can pertains to a controller for air, the controller for air can receive the set value of air and processed value of air and based on the received set value of air and processed value of air generate a control signal. The control signal can be transmitted to a first control valve 220-1. The first control valve 220-1 can be used to control flow of air to the furnace.
[064] In an embodiment, block 214 pertains to processing of ratio controller program for gas such as oxygen and the like by the control unit. In an embodiment, block 216 pertains to cascade mode of operation wherein based on the processed ratio controller program for gas by the control unit, gas set value is generated.
[065] In an embodiment, block 218 pertains to automatic mode of operation wherein the operator can manually set the control value of gas. In an embodiment, the set value of gas can be generated by any or a combination of automatic mode or cascade mode of operation.
[066] In an embodiment, block 222 can pertains to a controller for gas, the controller for gas can receive the set value of gas and processed value of gas and based on the received set value of gas and processed value of gas generate a control signal. The control signal can be transmitted to a second control valve 220-2. The second control valve 220-2 can be used to control flow of gas to the furnace.
[067] FIG. 3 illustrates an exemplary flow diagram representation of process for generating a control signal in accordance with an embodiment of the present disclosure.
[068] In an embodiment, block 302 pertains to oxygen controller. Further block 304 pertains to oxygen processed value from the set of sensors. In an embodiment, block 306 pertains to execution of program for generating a control signal for oxygen correction by air ratio correction to generate a control signal that can be used to control the control valve of air. In an embodiment, block 308 pertains to execution of program for generating a control signal for oxygen correction by gas ratio correction to generate a control signal that can be used to control the control valve of gas.
[069] FIG. 4A illustrates an exemplary flow diagram representation of process for controlling flow of gas to the furnace in accordance with an embodiment of the present disclosure.
[070] In an embodiment, block 402 pertains to division of processed values of air and set value of air-gas ratio. In an embodiment, block 404 pertains to multiplying values received from block 402 and oxygen correction through gas ratio correction.
[071] In an embodiment, block 406 pertains to mode when oxygen correction mode is selected. Further, block 408 pertains to mode when zone correction is not selected. In an embodiment, block 412 pertains to multiplication of gas max value and heat demand set manually. In an embodiment, block 410 pertains to comparison of the value from block 412 or the value from any or a combination of block 406 and block 408.
[072] In an embodiment, block 414 pertains to cascade mode of operation wherein based on value generated by comparison at block 410.
[073] In an embodiment, block 416 pertains to automatic mode of operation wherein the operator can manually set the control value of gas. In an embodiment, the set value of gas can be generated by any or a combination of automatic mode or cascade mode of operation.
[074] In an embodiment, block 418 can pertains to a controller for gas, the controller for gas can receive the set value of gas and processed value of gas and based on the received set value of gas and processed value of gas generate a control signal. The control signal can be transmitted to a gas control valve 420. The gas control valve 420 can be used to control flow of gas to the furnace.
[075] FIG. 4B illustrates an exemplary flow diagram representation of process for controlling flow of air to the furnace in accordance with an embodiment of the present disclosure.
[076] In an embodiment, block 452 pertains to multiplication of processed values of gas and set value of air-gas ratio. In an embodiment, block 454 pertains to multiplying values received from block 452 and oxygen correction through gas ratio correction.
[077] In an embodiment, block 456 pertains to mode when oxygen correction mode is selected. Further, block 458 pertains to mode when zone correction is not selected. In an embodiment, block 462 pertains to multiplication of air max value and heat demand set manually. In an embodiment, block 460 pertains to comparison of the value from block 462 or the value from any or a combination of block 456 and block 458.
[078] In an embodiment, block 464 pertains to cascade mode of operation wherein based on value generated by comparison at block 460.
[079] In an embodiment, block 466 pertains to automatic mode of operation wherein the operator can manually set the control value of air. In an embodiment, the set value of air can be generated by any or a combination of automatic mode or cascade mode of operation.
[080] In an embodiment, block 468 can pertains to a controller for gas, the controller for gas can receive the set value of gas and processed value of gas and based on the received set value of gas and processed value of gas generate a control signal. The control signal can be transmitted to a gas control valve 470. The gas control valve 470 can be used to control flow of gas to the furnace.
[081] FIG. 5 illustrates an exemplary flow diagram illustrating a process for increasing efficiency of the furnace in accordance with an embodiment of the present disclosure.
[082] In an aspect, the proposed method may be described in general context of computer executable instructions. Generally, computer executable instructions can include routines, programs, objects, components, data structures, procedures, modules, functions, etc., that perform particular functions or implement particular abstract data types. The method can also be practiced in a distributed computing environment where functions are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, computer executable instructions may be located in both local and remote computer storage media, including memory storage devices.
[083] The order in which the method as described is not intended to be construed as a limitation, and any number of the described method blocks may be combined in any order to implement the method or alternate methods. Additionally, individual blocks may be deleted from the method without departing from the spirit and scope of the subject matter described herein. Furthermore, the method may be implemented in any suitable hardware, software, firmware, or combination thereof. However, for ease of explanation, in the embodiments described below, the method may be considered to be implemented in the above described system.
[084] In an embodiment, the process for increasing efficiency of the furnace can be initiated at step 502 that pertains to detecting amount of oxygen present in the flue gas passing through the furnace of hot strip mill. Further, step 504 pertains to generating a control signal based on the detected amount of oxygen. Further, step 506 pertains to controlling flow of air and oxygen to the furnace based on the generated control signal, wherein the control unit configured to control flow of air and oxygen to the furnace using the one or more valves to achieve a pre-defined temperature and increasing efficiency of the furnace.
[085] It would be appreciated by the person skilled in the art that the present invention eliminates the problem of human error and the resultant problems. The innovative idea was to install Oxygen Analyzer with continuous on-line monitoring of the proper air/gas ratio which could be achieved with 100% success after the installation.
[086] Thus, it will be appreciated by those of ordinary skill in the art that the diagrams, schematics, illustrations, and the like represent conceptual views or processes illustrating systems and methods embodying this invention. The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing associated software. Similarly, any switches shown in the figures are conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the entity implementing this invention. Those of ordinary skill in the art further understand that the exemplary hardware, software, processes, methods, and/or operating systems described herein are for illustrative purposes and, thus, are not intended to be limited to any particular named.
[087] While embodiments of the present invention have been illustrated and described, it will be clear that the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the invention, as described in the claim.
[088] In the foregoing description, numerous details are set forth. It will be apparent, however, to one of ordinary skill in the art having the benefit of this disclosure, that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form, rather than in detail, to avoid obscuring the present invention.
[089] As used herein, and unless the context dictates otherwise, the term "coupled to" is intended to include both direct coupling (in which two elements that are coupled to each other contact each other)and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms "coupled to" and "coupled with" are used synonymously. Within the context of this document terms "coupled to" and "coupled with" are also used euphemistically to mean “communicatively coupled with” over a network, where two or more devices are able to exchange data with each other over the network, possibly via one or more intermediary device.
[090] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C …. and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.
[091] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skillin the art.

ADVANTAGES OF THE PRESENT DISCLOSURE
[092] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill.
[093] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill that produce a high-quality hot roll coil.
[094] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill that helps reduce wastage of fuel.
[095] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill that protect damage of costly refractory of chimney and recuperator pipe.
[096] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill that is eco-friendly as the unburnt fuel is reduced that is hazardous to environment.
[097] The present disclosure provides a method and system for increasing efficiency of a furnace of a hot strip mill that is cost effective and easy to implement.