DESC:
FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
SPIRAL BURNER FOR PETROLEUM COKE FIRED GLASS
MANUFACTURING FURNACE

Applicant:
HSIL Limited,
A company Incorporated in India under the Companies Act, 1956
Having Address:
Glass Factory Road,
Off. Motinagar, Sanathnagar P.O.
Hyderabad - 500 018, Telangana State, India

The following specification particularly describes the invention and the manner in which it is to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present application claim priority from provisional patent application having application number 5031/CHE/2015 filed on September 21, 2015.
TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a petroleum coke (petcoke) fired glass manufacturing furnace and in particular to a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace.
BACKGROUND
[003] Petroleum coke (Petcoke) is a black-colored solid composed primarily of carbon, and may contain sulfur, metals, and non-volatile inorganic compounds. Petcoke is delivered from oil refinery cooker units or other cracking processes. Coking processes that can be employed for making petcoke include contact coking, fluid coking, flexi-coking and delayed coking. Petcoke typically is used as fuel for combustion in industrial and power generating plants. In particular, cement plants and power plants are currently the two greatest consumers of petcoke.
[004] Generally, manufacturing of glass is done based utilizing different type of furnace and using different types of fuels, dependent on the final characteristics of the glass product and also with regard to the thermal efficiency of the processes. Conventionally, the fuel used to melt glass is fuel oil, coming from distillation of petroleum. However, the continuing upward spirals of energy costs, for example natural gas, have forced use of petcoke in manufacturing of glass.
[005] During the manufacturing of glass, petcoke combustion utilizing conventional burners results in incomplete and uneven combustion rations. Further, uneven combustion results in heat spots or hot zones. Further, the un-burnt petcoke mixes with glass thus degrading the quality of glass being manufactured. Furthermore, any un-burnt petcoke may cause choking in the exhaust circuit, damage to the furnace refractory along with environmental damages.

SUMMARY
[006] Before the present a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, with one or more chemical, in a glass manufacturing furnace system, are described, it is to be understood that this application is not limited to the particular system(s), and methodologies described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular implementations or versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, with one or more chemical, in a glass manufacturing furnace system. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[007] In one implementation, a spiral burner for a petcoke fired glass manufacturing furnace is disclosed. The spiral burner comprises a petcoke-air mixture pipe, an air pipe, a first outer pipe mounted over the petcoke-air mixture pipe, and a second outer pipe coupled to the first outer pipe at one end and mounted over the petcoke-air mixture pipe. Further, the petcoke-air mixture pipe and the air pipe comprise a quick release coupling at an inlet end. Further, the first outer pipe comprise a through hole located near the inlet end of the petcoke-air mixture pipe and the second outer pipe comprises a swirl piece welded on the inner surface of the second outer pipe. Upon assembly, assembly an inner surface of the first outer pipe and an outer surface of the petcoke-air mixture pipe forms a straight air channel and an inner surface of the second outer pipe and an outer surface of the petcoke-air mixture pipe forms a swirl air channel. During operation, the petcoke-air mixture pipe receives petcoke-air mixture and the air pipe receives combustion air. Further, to receiving the combustion air flows through the straight air channel, then through the swirl air channel and exists in a swirling pattern.
BRIEF DESCRIPTION OF THE DRAWINGS
[008] The foregoing detailed description of embodiments of a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, with one or more chemical, in a glass manufacturing furnace system is better understood when read in conjunction with the appended drawings. For the purpose of illustrating of the present subject matter, an example of construction of a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, with one or more chemical, in a glass manufacturing furnace system is provided as figures; however, the invention is not limited to the specific method and system disclosed in the document and the figures.
[009] In the detailed description, an embodiment of the spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, with one or more chemical, in a glass manufacturing furnace system is described in detail with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer various features of the present subject matter.
[010] Figure 1 illustrates a petcoke fired glass manufacturing furnace, in accordance with an embodiment of the present subject matter.
[011] Figure 2A, 2B and 2C illustrates a spiral burner for the petcoke fired glass manufacturing furnace in accordance with an embodiment of the present subject matter.
[012] Figure 3A, 3B, and 3C illustrates various parts of the spiral burner, in accordance with an embodiment of the present subject matter.
[013] Figure 4A, 4B, and 4C illustrates a welded piece of the spiral burner, in accordance with an embodiment of the present subject matter.
[014] The figure depicts an embodiment of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
[015] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, , similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, are now described. The disclosed embodiments a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, are merely examples of the disclosure, which may be embodied in various forms.
[016] A typical composition of petroleum coke (petcoke) is given as follow: carbon about 90%; hydrogen about 3%; nitrogen from about 2% to 4%; oxygen about 2%; Sulphur from about 0.05% to 6%; and others about 1%. Further, the other comprises vanadium, and sodium. Effective and complete burning of fuel in the glass manufacturing is critical as the temperature/heat generated after combustion of the fuel, directly affects the quality of fuel. In a petcoke fired glass manufacturing furnace the conventionally know burners fail as the petcoke is a super fine particulate matter and not readily combustible. During the manufacturing of glass conventional, the burners utilized for combustion of petcoke, result in incomplete and uneven combustion of petcoke. Furthermore, uneven combustion results in heat spots or hot zones. Moreover, any un-burnt petcoke tend to mix with glass, thus degrading the quality of glass being manufactured. Furthermore, any un-burnt petcoke may also cause choking in the exhaust circuit, damage to the furnace refractory along with environmental damages.
[017] In implementation of the present subject matter, a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, is disclosed. In the implementation, the spiral burner comprises a petcoke-air mixture pipe, an air pipe, a first outer pipe mounted over the petcoke-air mixture pipe, and a second outer pipe coupled to the first outer pipe at one end and mounted over the petcoke-air mixture pipe. Further, the petcoke-air mixture pipe and the air pipe comprise a quick release coupling at an inlet end. Further, the first outer pipe comprise a through hole located near the inlet end of the petcoke-air mixture pipe and the second outer pipe comprises a swirl piece welded on the inner surface of the second outer pipe.
[018] Upon assembly, assembly an inner surface of the first outer pipe and an outer surface of the petcoke-air mixture pipe forms a straight air channel and an inner surface of the second outer pipe and an outer surface of the petcoke-air mixture pipe forms a swirl air channel.
[019] During operation, the petcoke-air mixture pipe receives petcoke-air mixture and the air pipe receives combustion air. Further, to receiving the combustion air flows through the straight air channel, then through the swirl air channel and exists in a swirling pattern.
[020] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments for a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace. However, one of ordinary skill in the art will readily recognize that the present disclosure of a spiral burner for a petroleum coke (petcoke) fired glass manufacturing furnace, is not intended to be limited to the embodiments described, but is to be accorded the widest scope consistent with the principles and features described herein.
[021] Referring now to Figure 1, where the figure 1 illustrates a petroleum coke (pet coke) fired glass manufacturing furnace system 100, in accordance with an embodiment of the present subject matter, is disclosed. Further, table 1 below, disclosed some of the illustrative elements of glass manufacturing furnace system 100.
Table 1: List of elements
Element Number Definition Element Number Definition
101 Big bag unloading machine 111 Manual slide gate
102, 104, 113 Rotary Air lock feeder 112 Screw conveyor with VFD
103 Rotary screen 118 Return line valve
105, 114 Pneumatic Screw hopper 119a, 119b Pneumatic Valves
106,115 Pneumatic screw pump 120 Reversal system
107, 116 Roots blower 121A, 121B Petroleum coke burners
108, 117 Dust collector 122 Root blower
109 Service silo 123 Furnace
110A, 110B Single shaft agitator 124 Chimney
125 Regenerator
[022] In the embodiment during operation petroleum coke is received at the glass melting furnace system 100 site in jumbo bags of 1 tons (not shown) capacity. In one example, the jumbo bags are unloaded from trucks and stored in closed shed (not shown) near unloading station. The unloading station comprises of big bag unloading machine 101, rotary air lock feeder 102 and 104, rotary screen 103 and a pneumatic screw hopper 105, and dosing chamber 106 for material transfer. The big bag unloading machine 101 is provided with an electric hoist (not shown) to lift the bag from ground level to machine. The operator positions the bags on the big bag unloading machine 101 and material is extracted, which is fed to rotary screen 103 via rotary Air Lock feeder 102, of unloading machine. A rotary type screen 103 is provided for screening the received petroleum coke to eliminate the foreign bodies and oversize material. The pneumatic screw hopper 105 is provided to collect the screened material. The pneumatic screw pump 106 is used to convey the material pneumatically to service silo 109. A rotary air lock feeder 104 is provided above the pneumatic screw pump to avoid any air leakage or back pressure and to ensure smooth material flow. The pneumatic screw pump 106 conveys the petroleum coke. A twin lobe positive displacement roots blower 107 provided for air transportation. The conveyed material is collected in service silo 109. The complete circuit from unloading machine to pneumatic screw pump has to be suitably vented to ensure dust free atmosphere. The vent points are provided on unloading machine, rotary screen and hopper and connected to the dust collector 108.
[023] Service silo 109 is positioned near the furnace area. The service silo 109 is provided with extraction system. The silo is also provided with purging system, explosion flaps and bag filter. The single shaft agitator 110A & 110B is provided for smooth flow of petroleum coke. The screw conveyer or dosing screw 112 shall extract the material from service silo 109 and feeds to pump hopper 114 via Rotary Air lock feeder 113. Further, the pump hopper 114 discharges the petroleum coke to Pneumatic screw pump 115. A twin lobe positive displacement roots blower 116 is used for conveying air to the Pneumatic screw pump 115. The piping arrangement is done to suit furnace requirement. The first pneumatic diverter or reversal system 120 and second pneumatic diverter or return line valve 118 conveys material to service silo 109. Further, the reversal system 120 in an alternating fashion diverts petroleum coke to the burner 119a &119b.
[024] The burners are specially designed for roots blower air pressure to the burners 121A and 121B. Since pet coke has low volatiles it takes longer time to ignite. The burners are provided with swirled slot to ensure the petcoke particles are retained in air stream till it ignites. An additional roots blower 122 is considered for burners which will provide the swirl air and also does the function of cooling the burner and retaining the flame. Further the furnace 123 may be connected to a chimney 124 via a flue gas system (not shown).
[025] Various modifications to glass manufacturing furnace system 100 will be readily apparent to those skilled in the art upon reading the description and the generic principles herein may be applied to other embodiments. Furthermore, one of ordinary skill in the art will readily recognize the glass manufacturing furnace system 100 may comprises other systems and machines and the like.
[026] Figure 2A, 2B, 2C illustrate a spiral burner 121 for the petcoke fired glass manufacturing furnace in accordance with an embodiment of the present subject matter. Figure 3A, 3B, and 3C illustrates various parts of the spiral burner 121, in accordance with an embodiment of the present subject matter. Figure 4A, 4B, and 4C illustrates a welded piece 302 of the spiral burner 121, in accordance with an embodiment of the present subject matter. Further, one or more implementations of the present subject matter may be described with reference to figures 2A-Figure 4C, in the succeeding section.
[027] In one of the embodiment, the spiral burner 121 comprises a petcoke-air mixture pipe 202, an air pipe 206, a first outer pipe 204, a flange part 208, a nut 210, and a second outer pipe 212. Further, the petcoke-air mixture pipe 202, the air pipe 206, the first outer pipe 204, the flange part 208, the nut 210, and the second outer pipe 212 are connected as shown in Fig 2. In one example, connection may be executed by welding the parts. In one other example, the petcoke-air mixture pipe 202 is configured to receive a pet coke air mixture. Further, the air pipe 206 is configure receive combustion air for complete burning. Further, the second outer pipe 212 comprises a swirl piece 302, welded inside the fifth part 212. In the embodiment due to the configuration, during operation the air and pet coke is mixed and ejected out of the burner in a spiral flow, for complete combustion. In one embodiment, the swirl piece 302 is welded inside the second outer pipe 212, to achieve a spiral outflow for effective burning. In one example the swirl piece 302, comprises multiple slot 402 in the perimeter of the welded piece 302. Further, the slot 402 may be placed at an angle the central axis to obtain spiral output. During the flow of petcoke air mixture the configuration of the swirl piece 302 with the slot 402, causes the flow to become spiral.
[028] In one more embedment, the spiral burner 121 comprises a petcoke-air mixture pipe 202, an air pipe 206 bend by 90 degrees, a first outer pipe 204 mounted over the petcoke-air mixture pipe 202, a second outer pipe 212 coupled to the first outer pipe 204 at one end and mounted over the petcoke-air mixture pipe 202 and a flange part 208 mounted over the first outer pipe 204 and welded to the outer surface of the first outer pipe 204.
[029] Further, the petcoke-air mixture pipe 202 may comprise a quick release coupling 220-B at an inlet end 302 and the air pipe 206 comprises a quick release coupling 220-A at a receiving end 304. The first outer pipe 204 may comprise a through hole 308 located near the inlet end of the petcoke-air mixture pipe 202 and the second outer pipe 212 comprises a swirl piece 302 welded on the inner surface of the second outer pipe 212. In one example, the swirl piece 302 may comprise a plurality of slot 402 place at equal distance from each other configured inclined to the central axis along the burner Further, the one end of the second outer pipe 212 may comprises thread section on the inner surface and the other end of the second outer pipe 212 may be tapered. Furthermore, a second end, of the first outer pipe 204 may comprise thread section on the outer surface. Further, the outlet end of the petcoke-air mixture pipe 202 opposite to the inlet end of the petcoke-air mixture pipe 202 and a other end of the second outer pipe 212 is made up of alloy steel.
[030] In the implementation, during assembly, the first outer pipe 204 may be mounted over the petcoke-air mixture pipe 202 and the air pipe 206 may be welded to the through hole 308. Subsequently, the first end, of the first outer pipe 204 closest to the inlet end of the petcoke-air mixture pipe 202 may be sealed. Further, the swirl piece 302 may be welded to the internal surface of the second outer pipe 212. Furthermore, the second outer pipe 212 may be mounted over the petcoke-air mixture pipe 202 and coupled to the first outer pipe 204 at utilizing the threaded sections. Further nut may be utilized to strengthen the connection between the second outer pipe 212 and the first outer pipe 204. Upon completion of the above assembly
[031] Upon completion of the above assembly, the inner surface of the first outer pipe 204 and the outer surface of the petcoke-air mixture pipe 202 forms a straight air channel. Further, the inner surface of the second outer pipe 212 and an outer surface of the petcoke-air mixture pipe 202 forms a swirl air channel.
[032] In the implementation, during operation the petcoke-air mixture pipe 202 receives petcoke-air mixture. Upon receiving, the petcoke-air mixture flows through the length of the petcoke-air mixture pipe 202 an exits at the outlet in to the furnace for combustion. Simultaneously, the air pipe 206 receives combustion air from roots blower 122. Upon receiving the combustion air, pass through the straight air channel and subsequently through swirl air channel and exists in a swirling pattern around the petcoke-air mixture in the furnace for combustion. The swirling combustion helps complete combustion as the unburnt petcoke remain suspended in the air for longer duration of time. Further, the flow of the combustion air around the petcoke air mixture pipe act as a cooling agent, thus removing the need of secondary cooling set such as water cooling.
[033] In one more embodiment, the spiral burner 121 may be used for end fired glass furnace. In the embodiment, the burner is placed in the front wall, parallel to the flow of glass. Further, due to the spiral pattern and the spiral burner 121 placement the flame travels horizontally above the glass surface and the heat is transferred by induction to the glass. The flame does not touch the glass and in turn reducing hot spots and uneven heating. Furthermore, the flame travels 2/3rd of the length of furnace.
[034] Exemplary embodiments discussed above may provide certain more advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[035] Some embodiments of the spiral burner do not required any secondary burner cooling arrangement.
[036] Some embodiments of the spiral burner enable complete burning of petcoke.
[037] Some embodiments of the spiral burner avoid kinks in the connecting rubber hose due to 90 degree bend in the air pipe
[038] Some embodiments of the spiral burner have reduced back pressure during supply of combustion due to gradual bending of air pipe.
[039] Some embodiments of the spiral burner same removal and installation time due to use of quick release coupling
[040] Some embodiments of the spiral burner reduce degradation of glass being manufactured.
[041] Various modifications to the spiral burner for the petcoke fired glass manufacturing furnace will be readily apparent to those skilled in the art based on the description and the generic principles herein may be applied to other embodiments. Furthermore, one of ordinary skill in the art will readily recognize the spiral burner for the petcoke fired glass manufacturing furnace. Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include the spiral burner for the petcoke fired glass manufacturing furnace. Although implementations for methods and device for the spiral burner for the petcoke fired glass manufacturing furnace have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features, devices, systems and methods are disclosed as examples of implementations for the spiral burner for the petcoke fired glass manufacturing furnace.
,CLAIMS:
1. A spiral burner (121) for a petcoke fired glass manufacturing furnace, the spiral burner (121) comprising
a petcoke-air mixture pipe (202), wherein the petcoke-air mixture pipe (202) comprises a quick release coupling (220-B) at an inlet end (302), and wherein during operation the petcoke-air mixture pipe (202) receives petcoke-air mixture and exits through an outlet end;
an air pipe (206), wherein the an air pipe (206) is gradually bend by 90 degrees, wherein the air pipe (206) comprises a quick release coupling (220-A) at a receiving end, and wherein during operation the air pipe (206) receives combustion air from roots blower (122);
a first outer pipe (204) mounted over the petcoke-air mixture pipe (202), wherein upon assembly an inner surface of the first outer pipe (204) and an outer surface of the petcoke-air mixture pipe (202) forms a straight air channel, wherein the first outer pipe (204) comprise a through hole (308) located near the inlet end of the petcoke-air mixture pipe (202) and configured to receive the air pipe (206) upon assembly, and wherein during operation the combustion air flows through the straight air channel; and
a second outer pipe (212) coupled to the first outer pipe (204) at one end and mounted over the petcoke-air mixture pipe (202), wherein the second outer pipe (212) comprises a swirl piece (302) welded on the inner surface of the second outer pipe (212), wherein upon assembly an inner surface of the second outer pipe (212) and an outer surface of the petcoke-air mixture pipe (202) forms a swirl air channel, and wherein during operation the combustion air flows through the swirl air channel and exists in a swirling pattern.

2. The spiral burner (121) of claim 1, wherein the spiral burner (121) further comprises a flange part (208) mounted over the first outer pipe (204) and welded to the outer surface of the first outer pipe (204).

3. The spiral burner (121) of claim 1, wherein the swirl piece (302) comprises a plurality of slot (402) place at equal distance from each other.

4. The spiral burner (121) of claim 1, wherein each of the plurality of slot (402) is configured inclined to the central axis.

5. The spiral burner (121) of claim 1, wherein the spiral burner (121) is placed in the front wall of an end fired glass manufacturing furnace, and wherein the spiral burner is oriented parallel to the flow of the glass.

6. The spiral burner (121) of claim 1, wherein at least the outlet end of the petcoke-air mixture pipe (202) opposite to the inlet end (302) of the petcoke-air mixture pipe (202) and a other end of the second outer pipe (212) is made up of alloy steel.

7. The spiral burner (121) of claim 1, wherein a first end, of the first outer pipe (204) closest to the inlet end of the petcoke-air mixture pipe (202), is sealed.

8. The spiral burner (121) of claim 1, wherein a second end, of the first outer pipe (204) comprises thread section on the outer surface.

9. The spiral burner (121) of claim 1, wherein the other end of the second outer pipe (212) is tapered.

10. The spiral burner (121) of claim 1, wherein the one end of the second outer pipe (212) comprises thread section on the inner surface.