Claims:WE CLAIM:
1. A soot blowing system (12A, 12B &12C) for plate type denitrification catalyst (11), the soot blowing system (12A, 12B &12C) being configured for cleaning of the plate type denitrification catalyst (11) in coal fired power plants, the soot blowing system (12A, 12B &12C) comprising:
a series of nozzles (13), the nozzles (13) being provided over bottom half section of the soot blowing system (12A, 12B & 12C); and
a plurality of air mass flow controllers (6A, 6B & 6C) configured to provide a required quantity of compressed air (14) to the soot blowing system (12A, 12B &12C).
2. The soot blowing system (12A, 12B &12C) as claimed in claim 1, wherein the soot blowing system (12A, 12B &12C) uses the compressed air (14) as a flushing agent, which is connected through solenoid operated globe valves (7A, 7B & 7C), the compressed air (14) is supplied with help of compressor (1) and is connected through drier (2), pressure control valve (3), air receiver (4), the mass flow controllers (6A, 6B & 6C), solenoid operated globe valves (7A, 7B & 7C), and non-return valves.
3. The soot blowing system (12A, 12B &12C) as claimed in claim 1, wherein the nozzles (13) are provided at the bottom half section of the soot blowing system (12A, 12B & 12C), the nozzles (13) are provided at twelve points along the length of the soot blowing system (12A, 12B & 12C) and at each point there are eleven nozzles are provided on same plane to clean the soot / fine dust particles between two plates without damaging the plate type catalysts (11).
4. The soot blowing system (12A, 12B &12C) as claimed in claim 1, wherein the air mass flow controllers (6A, 6B & 6C) are provided to control the quantity of compressed air (14) to avoid SO2 to SO3 formation.
5. The soot blowing system (12A, 12B &12C) as claimed in claim 1, wherein the pressure control valve (3) is arranged to control the compressed air (14) pressure at inlet of the air receiver (4).
6. The soot blowing system (12A, 12B &12C) as claimed in claim 1, wherein the differential pressure transmitter (5) is arranged in the SCR reactor between the inlet and the outlet, the differential pressure transmitter (5) is connected to the solenoid operated globe valve (7A, 7B & 7C), and solenoid operated globe valve (7A, 7B & 7C) controls the compressed air (14) in to the soot blower system (12A, 12B &12C); when the differential pressure measured values of the transmitter (5) exceeds the predefined value, the said solenoid operated globe valve opens (7A, 7B & 7C) and immediately the compressed air (14) flush the soot / fine coal dust available in the plate type SCR catalyst (11) through nozzles (13) provided over the soot blowing system (12A, 12B &12C).
, Description:A soot blowing system for plate type denitrification catalyst
FIELD OF INVENTION
[001] The present invention relates to Selective Catalyst Reduction (SCR) technology for De-NOx system of coal fired power plants. More particularly invention relates to a system for cleaning soot particles from the plate type SCR catalyst for De-NOx system. This is in the field of performance improvement and catalyst m-management system of plate type denitrification catalyst through cleaning technology.

BACKGROUND OF THE INVENTION

[002] NOx emissions are considered as major pollutants, which are released during coal combustion process. The most important oxides of nitrogen are NO (nitric oxide), NO2 (nitrogen dioxide) and N2O (nitrous oxide). Fossil fuel combustion and industrial processes are an important source of nitrous oxide. emissions. These two combined are responsible for 10% of human emissions which equals 700,000 tonnes of nitrous oxide per year. The emission of oxides of nitrogen (NOx) from combustion has attracted considerable attentions due to their serious impacts on environment, such as the formation of acid rain and photochemical smog. In view of the serious impacts on environment, all Power plants installed after 1st January, 2017 must meet the latest Environmental Protection Agency (EPA) emission standards. Out of all emissions, the oxides of nitrogen(NOx) has to reduce less than 100 mg/Nm3 levels from the level of 300 mg/Nm3. ln order to achieve emission norms set by Ministry of Environment and Forest (MOEF), Government of India for NOx level from the newer power plants, SCR based technology is the best technology to achieve.

[003] SCR technology is one of the most cost-effective technologies available to reduce NOx emissions from power plants. Selective catalytic Reduction (SCR) is an. advanced active emissions control technologies that offers an economic and effective means of reducing Nitrogen oxides (NOx) emissions from flue gas by injecting a reductant agent through a special catalyst into the exhaust stream of flue gas. SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere. It is called "selective" because it reduces levels of NOx using ammonia as a reducing agent within a catalyst system. The chemical reaction is known as "reduction" where the flue gas is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water.

[004] The Indian coals are sub bituminous coals which are dominated by very high ash content. Due to high ash content in coal, more soot/fine coal particles generated while production of flue gas through combustion process. The performance of the denitrification catalyst depends upon the two parameters those are denitrification efficiency and ammonia slip. The denitrification efficiency and the life of the SCR catalysts depends upon tie amount of soot/fine coal dust available in the flue gas. When the soot/fine coal dust particles stick on the surface of the catalyst, which reduces the surface contact between flue gas and catalyst, which in term reduces the reaction rate. When the reaction rate reduces, the denitrification efficiency reduces and ammonia slip increases. In order to avoid the above issues, the cleaning of SCR catalyst is very crucial part in De-NOx system of coal fired power plants.

[005] In order to achieve the above denitrification catalyst performance parameters, the soot removal system is employed to clean the soot from the surfaces of plate type denitrification catalysts. The dry compressed air is used as the flushing agent to clean the soot over catalyst in a segment wise. The cleaning efficiency of a soot-removal system depends upon the size of the nozzles, orientation of the nozzles and from the level of pressure at which the dry air fluid flows into the denitrification catalyst.

PRIOR ARTS

[006] CN102389838 - The invention relates to a device for on-line cleaning of a selective catalytic reduction (SCR) denitration catalyst and a cleaning process thereof. The device is formed through integrating a soot blower, a cleaning device, a waste liquid collecting device and a hot air-drying device, in addition, the on-line cleaning on the catalyst is carried out in the early period of the catalyst invalidation, and catalyst surface sediments, pore blockage substances, alkali metal and other soluble toxic substances are removed. The technology has the advantages that the catalyst activity is improved, the service life of the catalyst is prolonged, the denitration efficiency is improved, the nitrogen oxide discharge is reduced, simultaneously, the cleaning process of the catalyst is simplified, the dismounting and handling work is not needed, the unnecessary loss caused by the dismounting and handling work is avoided, the catalyst cleaning period is shortened, and a large amount of operation cost is saved for enterprises using the SCR denitration catalyst.

[007] KR20170128837 - The present invention and with the box constituting the unit of the soot removal step according as the progress of soot removal step of removing the soot (soot) adsorbed on the catalyst in the SCR chamber into a plurality single air injection compared to the SCR chamber differential pressure with a preset reference pressure difference , relates to the soot removal device and method of the SCR catalyst can be by applying a pressure difference is such that units of the soot removed is lower than the reference differential pressure process of the SCR chamber repeatedly to, regardless of the degree of contamination of the catalyst washing the catalyst effectively, according to the invention soot removal device of the SCR catalyst is an SCR catalyst having a chamber; Soot blowers by using the compressed air injected from the air injection nozzle washing the catalyst; Differential pressure measuring device for measuring the differential pressure (?P) between an input end and an output end of the SCR chamber; And that the predetermined reference store the differential pressure (?P ref) information, exceeds the reference differential pressure (?P ref) differential pressure across the SCR chamber in comparison with the reference differential pressure (?P ref) the differential pressure of the SCR chamber measured by the pressure measurement device determining whether and, depending on whether more than a control means for controlling the progress of a process unit of the soot removed by the soot blowers; made, including, unit soot removal step is composed of process a single plurality of air jet, an air jet process, the air characterized in that for a predetermined time by the spray nozzle is a compressed air jet process in which the catalyst.

[008] KR101684624 - The present invention is to, in the NOx contained in the exhaust gas in a catalytic reactor to convert the water and nitrogen, with holes formed in the porous catalyst layer to reduce the reaction area by contaminants contained in the exhaust gas catalyst reaction on the catalytic reactor to prevent degradation, by supplying compressed air to the porous catalyst layer being formed, including the catalytic cleaning section for removing the contaminants, by catalytic cleaning section rotates made of a blow-pipe for the porous catalyst layer of the layer porous catalyst layer the present invention relates to a catalytic reactor to clean the whole area.

[009] CN203917354 - The utility model provides an SCR catalyst regeneration dust removal device. The SCR catalyst regeneration dust removal device comprises a dust removal sealed shell, a dust removal fan and an air outlet control structure; the dust removal sealed shell is provided with a containing cavity for containing SCR catalysts to be regenerated, and an air inlet and an exhaust dust outlet are formed in the dust removal sealed shell; the dust removal fan is communicated with the containing cavity of the dust removal sealed shell; the air outlet control structure is connected with the dust removal fan and stretches into the dust removal sealed shell from the air inlet, and the air outlet control structure is provided with a plurality of air outlets located above the SCR catalysts to be regenerated. The SCR catalyst regeneration dust removal device enables dust on the SCR catalysts to be regenerated to be removed efficiently and rapidly.

[0010] KR20160069717 - Cleaning the SCR catalyst reactor system is utilized as the cleaning means a physical brush addition, with the air also injected into the SCR reactor in the divided air to the cleaning position. To this end, the art system includes a first ejecting portion that is installed on the inlet of the SCR reactor in the catalyst layer of the air jet; A second ejecting portion which is provided on the outlet side of the SCR reactor injects air in the direction opposite to the first ejecting portion; A first injection assembly and the injection supply of air to the ejection line 2 minutes; And by controlling the air supply feed line, toward the first ejecting portion and second catalyst layers on both sides of the catalyst layer located between the second injection assembly and a control unit for the air to be injected. As a result, a cleaning operation of removing dust of the catalyst in SCR reactor be made of a uniformly and effectively.

[0011] CN105363500 - The invention relates to a closed cleaning device and method for an inactive SCR denitration catalyst and a regeneration system and method. The closed cleaning device comprises a cleaning body box, an ultrasonic atomizer, an ultrasonic washing machine, a microbubble generator, a catalyst cleaning rotary plate and a micro negative-pressure suction device. The regeneration method includes the following steps that firstly, air blowing and sweeping are carried out; secondly, the in active SCR denitration catalyst is flushed and processed through running water by means of the microbubble explosive burst impact cleaning method, semi-dry method cleaning and acid steeping cleaning; thirdly, drying is carried out; fourthly, regeneration and activation are conducted to obtain a regenerated denitration catalyst. Regeneration of the inactive catalyst can be achieved. Compared with the common regeneration technology, cleaning achieved through the technology is thorough. Meanwhile, the utilization rate of a cleaning solution can be greatly increased, and the surface and the porous structure of the inactive catalyst can be restored to the largest extent.

[0012] CN103464221 - The invention relates to SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment which comprises an air compressor, a rinsing tank, an ultrasonic vibrator, a heater, a hot blast stove, a drainage pipeline and a tank cover; a high-pressure nozzle is arranged on the air compressor; the ultrasonic vibrator is arranged at the lower end of the rinsing tank; the heater is arranged at the bottom layer of the rinsing tank and used for heating liquid in the rinsing tank; the hot blast stove is connected into the rinsing tank through a conduit, and the tank cover is a movable seal cover; the drainage pipeline is provided with a control valve and arranged at the lower end of the rinsing tank. In addition, the invention provides an SCR denitration system catalyst regeneration technology method. According to the SCR denitration system catalyst regeneration equipment, the air compressor is used for purging a deactivated catalyst, the rinsing tank is used for performing rinsing, chemical treatment and activating processes, the heater can be used for regulating the temperature of solution in chemical treatment so as to improve the chemical reaction efficiency, the hot blast stove is used for drying the catalyst, so that the regenerative catalyst can be conveniently obtained, and the catalyst regeneration treatment efficiency can be enhanced.

[0013] CN203648390 - The utility model relates to a horizontal soot blowing device for a denitration catalyst. The device comprises a plurality of branch pipes which are parallel to the inner wall of a reactor and a catalyst module and are uniformly distributed and installed above the catalyst module, the branch pipes are not shorter than the catalyst module along the direction of the branch pipes, at least one port of each of the branch pipe is an air inlet, pores are formed in at least one side face of each of the branch pipes at intervals, and the plane where the pores are located is vertical to the catalyst module. The horizontal soot blowing device for the denitration catalyst provided by the utility model is fewer in mechanical failure, and no special steam soot blower operating platform is needed, so that the occupied area is small; the device is simple to arrange the process program, small in size, light in weight, compact in structure, reliable in operation, simple to operate and convenient to use; the device is large in soot blowing area, wide in using range, good in soot blowing effect and less in damage to the catalyst; the investment cost and the maintenance cost are saved.

[0014] KR20150107386 - Particulate matter removal of the selective catalytic reduction system with respect to the present invention apparatus, the cover is formed able to be coupled to the reactor housing for fixing the catalyst carrier of the catalyst carrier from the front frame; Is disposed in front of the catalyst carrier, the brush unit so formed can be off the particulate matter attached to the front face of the catalyst carrier; Connected to the brush unit allows the transfer unit is formed of the brush unit can be transported; And a dust collecting cartridge is arranged in the lower portion of the cover frame to be gathered by the particulate matter removed by the brush unit fall.

[0015] CN206779069 - The utility model provides a soot blower system for SCR reactor, installs on the SCR reactor, and this SCR reactor portion is equipped with a plurality of catalyst layers, the soot blower system should filter pressure relief device's low reaches and connect a plurality of air bottles simultaneously including the filtration pressure relief device who is connected with compressed air source, and the low reaches of each air bottle are connected with two air feed branch roads simultaneously, and each air feed branch road blows grey branch road including two of connecting in parallel each other, and each blows the nozzle that is located the solenoid valve at the upper reaches and is located low reaches that grey branch road includes interconnect, two air feed branch roads connecting same air bottle set up respectively before SCR reactor's different catalyst layers, set up two at least air feed branch roads of being connected with different air bottles before each catalyst layer. The utility model discloses an air feed branch road and nozzle cross arrangement in the catalyst layer department of difference of each air bottle have improved and have blown the efficiency of ash and the reliability and the stability of soot blower system, have guaranteed the reduction of discharging performance of SCR reactor.

[0016] CN103813857 - The present disclosure relates to a method for processing an SCR catalyst or an SCR system component has reduced the potential efficiency of the NOx, the NOx reduction efficiency is due to the potential in the system, or the particles clogging a plurality of channels or the SCR catalyst, which is such that the catalytic activity at least a portion of the area inaccessible for the flue gas. The method comprises using a jet stream with a pressurized carrier gas to remove particulate blasting medium and a particulate matter blockage of the jet directed SCR catalyst or an SCR system component.

[0017] KR101735788 - According to the present invention, a soot blower device capable of easily removing soot and scale comprises: a steam supplying unit disposed outside a combustion structure to supply steam to the inside of the combustion structure; a steam path opening and closing unit installed in a path of the steam supplying unit and having an electronic valve controlling a supply of steam; a rotation sleeve tube having one side connected to the steam supplying unit to be able to rotate and the other side connected to the inside of the combustion structure; a plurality of spray nozzles mounted on an outer surface of the rotation sleeve tube at regular intervals to spray steam in a screw form; a wall box provided between the steam supplying unit and the combustion structure to rotatably support the rotation sleeve tube and having an air introduction tube introducing external air of the combustion structure formed on one side thereof to introduce the external air into the inside of the combustion structure; an optical material catalytic member mounted in a tube connected with the steam path opening and closing unit and connected to the high pressure and temperature steam to discharge negative ions; and an ozone generation device connected to the air introduction tube to supply the small amount of ozone. Therefore, the soot blower device can supply steam along with negative ions naturally discharged from an optical catalyst material when the steam is supplied to the inside of a combustion chamber and can easily remove soot laminated on a surface of a combustion structure by supplying external air supplied to the inside of the combustion structure along with ozone components. Also, the soot blower device can more easily remove a scale layer by changing the scale layer in an acicular structure including sulfur oxides into in a globular structure and can prevent the soot and the scale layer from being attached again.

[0018] CN103055962 - The invention relates to a method and equipment for selective catalystic reduction (SCR) denitration catalyst reactivation. The method includes the following steps: first, using a gas cleaning process, and then using a liquid washing process and at last using a drying process, or includes the following steps: first, using the liquid washing process, and then using the gas cleaning process and at last using the drying process, and then pollutant substances on an inactive SCR denitration catalyst are removed. The equipment comprises a gas cleaning device, a liquid cleaning device and a drying device. Due to the method and the equipment for the SCR denitration catalyst reactivation, the inactive SCR denitration catalyst can be treated in a centralized mode, the pollutant substances on the surface of the SCR denitration catalyst and in pore channels and pores of the catalyst can be removed, the inactive SCR denitration catalyst generated from different factors can be treated and reactivated in the centralized mode, and the efficiency is high.

[0019] US20060127286 - A device for cleaning a selective catalyst reduction unit by directing air or a cleansing solution directly into or out of honeycomb cells of the selective catalyst reduction unit. The device utilizes a plurality of orifices which are sufficient in diameter and number to cleanse honeycomb cells thereby directing air or cleansing solution into or out of each individual honeycomb cell. The device also utilizes a plurality of probes which are sufficient in number and diameter to cleanse the honeycomb cells. The invention also involves a method for cleaning the honeycomb cells and a method for producing the catalyst cleaning tool.

[0020] CN105457687 - The invention provides an on-line blockage cleaning method for an SCR (selective catalytic reduction) denitration catalyst and equipment applied to the method. According to the method, a gas requiring denitration purification is stopped entering an SCR denitration reactor, and then compressed air is blown to the SCR denitration catalyst from an inlet of the SCR denitration reactor; the air flow pressure at the inlet and an outlet of the SCR denitration reactor is detected in real time, blowing of the compressed air is stopped when the inlet pressure is close to the outlet pressure and the pressure difference is stable, and on-line blockage cleaning is finished. The method is convenient, easy, economical and environment-friendly and has an exact effect, the SCR denitration catalyst is not needed to be dismounted, catalyst blockage cleaning can be finished on line, trouble and labor are saved, and the operation cost of related industry is reduced greatly.

[0021] CN103977845 - The present invention provides an SCR catalyst regeneration systems and methods. The SCR catalyst regeneration system comprises a dust removing device connected sequentially by a conveying means and the conveying means, cleaning means, reproducing means, a pre-drying apparatus and a drying apparatus, the drying apparatus comprises a pre-drying housing, the housing and in communication with the feed and drying heating the drying section of the drying air blower disposed between the dryer and the blower housing and heating and drying and the dry wind, and the drying unit drying heating and heat recovery apparatus connected to the drying means is discharged . By this SCR catalyst regeneration system can be reproduced rapidly in bulk SCR catalyst, improve production efficiency.

[0022] CN103813857 - The present disclosure relates to a method for processing an SCR catalyst or an SCR system component has reduced the potential efficiency of the NOx, the NOx reduction efficiency is due to the potential in the system, or the particles clogging a plurality of channels or the SCR catalyst, which is such that the catalytic activity at least a portion of the area inaccessible for the flue gas. The method comprises using a jet stream with a pressurized carrier gas to remove particulate blasting medium and a particulate matter blockage of the jet directed SCR catalyst or an SCR system component.

[0023] The present invention focuses on improving service life of the catalyst, the denitration efficiency of SCR, reducing operational cost and initial cost and simplification of cleaning process of the catalyst. The present invention can overcome the drawbacks of the above mentioned prior arts.

OBJECTS OF THE INVENTION

[0024] An object of the present invention is to propose a system and method for cleaning soot particles from the plate type SCR catalyst for De-NOx system.

[0025] Another object of invention is to clean the soot/coal fine particles in a segment wise over a plate type denitrification catalyst by injecting a dry and compressed air intermittently.

[0026] A further objective of the present invention is to provide more nozzles at different points over bottom half section of the blowing system to clean total width of the plate type catalyst layer without damaging the catalyst material due to higher compressed air pressure.

[0027] A still another object of the present invention is to provide a mass flow controller to control the quantity of air to flush the soot/ fine coal particles over plate type denitrification catalyst to reduce SO2 to SO3 conversion.

SUMMARY OF THE INVENTION

[0028] A soot blowing system (12A, 12B &12C) for plate type denitrification catalyst (11), the soot blowing system (12A, 12B &12C) being configured for cleaning of the plate type denitrification catalyst (11) in coal fired power plants, the soot blowing system (12A, 12B &12C) includes a series of nozzles (13), the nozzles (13) being provided over bottom half section of the soot blowing system (12A, 12B & 12C); and a plurality of air mass flow controllers (6A, 6B & 6C) configured to provide a required quantity of compressed air (14) to the soot blowing system (12A, 12B &12C).

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0029] Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings of the exemplary embodiments and wherein:
Figure 1 shows: A Schematic view of the dedusting process for denitrification system in a coal fired power plant.
Figure 2 shows: a diagrammatic front view of the soot blowing system with plate type SCR catalyst.
Figure 3 shows: a diagrammatic top view of the soot blowing system with plate type SCR catalyst.
Figure 4 shows: a diagrammatic side view of the soot blowing system with plate type SCR catalyst.

DETAIL DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE PRESENT INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS

[0030] The present invention, now be described more specifically with reference to the following specification.

[0031] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Further more, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.

[0032] The present invention provides the system and method for cleaning of plate type SCR (selective catalytic reaction) catalyst in a coal fired power plants. Selective Catalytic Reduction (SCR) is an advanced active emissions control technology that offers an economic and effective means of reducing Nitrogen Oxide (NOx) emissions from flue gas by injecting a reductant agent through a special catalyst into the exhaust stream of flue gas. SCR is typically capable of removing 80 to 90 percent of NOx emissions from fossil fuel power plants and is widely considered the most effective technology demonstrated up to date for this purpose. The denitrification efficiency and the catalyst life of SCR depends upon the soot / fine coal dust concentration in flue gas. When the soot / fine coal dust concentration in flue gas increases, the flue gases could not contact with denitrification catalyst and the denitrification efficiency reduces. Apart from the denitrification efficiency, the catalyst life also reduces. Therefore, keeping the catalyst clean is a critical part of the design process. To avoid the accumulation of soot/fine coal dust particles in a plate type denitrification catalyst, a solenoid operated stationary soot blowing system has been proposed. The invented soot blower removes the soot / fine coal dust particles from plate type denitrification catalyst in segment wise without damaging the catalyst material due to compressed air pressure and also to avoid SO2 to SO3 formation, a mass flow controller also installed to optimize the compressed air flow rate to SCR reactor. The present invention focuses on improving service life of the catalyst, the denitration efficiency of SCR reducing operational cost and simplification of cleaning process of the catalyst.

[0033] Fig. 1 illustrate a Schematic view of the dedusting process for denitrification system / soot blowing system in a coal fired power plants consists of three SCR denitration reactors (10A, 10B & 10C), the SCR denitration reactors (10A, 10B & 10C) are loaded with plate type SCR catalysts (11) and the reaction takes place between flue gas (9) and ammonia in presence of plate type SCR catalysts (11). During the denitrification process the soot/fine coal dust particles stick over the plate type catalyst due to that the reactivity of the catalyst will be reduced. To increase the catalyst reactivity the plate type SCR catalyst (11), the plate type SCR catalyst (11) should be cleaned intermittently with compressed air (14). The compressed air (14) is generated through the compressor (1) and is dried in drier (2) and sent to the air receiver (4) through pressure control valve (3), the pressure control valve (3) is controlled with help of pressure transmitter (5) which is fitted on air receiver (4). The required quantity of compressed air (14) is sent to the soot blowing system (12A, 12B &12C) through mass flow controller (6A, 6B & 6C), where the required quantity of air allows in to solenoid operated Globe valve (7A, 7B & 7C). The soot blowing system (12A, 12B &12C) has the series of nozzles (13), the nozzles (13) are provided over bottom half section of the blowing system (12A, 12B & 12C).

[0034] Fig. 2 shows a front view of the Soot blowing System with Plate type SCR catalyst. The soot blowing system (12A, 12B & 12C) consists of various nozzles (13), the nozzles (13) are provided at the bottom half section of the soot blowing system (12A, 12B & 12C). The nozzles (13) are provided at twelve points along the length of the soot blowing system and each point there are eleven nozzles are provided on same plane to clean the soot / fine coal dust particles between two plates without damaging the plate type catalysts.

[0035] Fig. 3 shows a top view of the Soot blowing system with Plate type SCR catalyst. The soot blowing system (12A, 12B &12C) is installed above the plate type catalyst (11) and the soot is cleaned with compressed air (14) with help of nozzles (13) provided on the soot blowing system (12A, 12B & 12C).

[0036] Fig. 4 shows a side view of the Soot blowing system with Plate type SCR catalyst. The soot blowing system (12A, 12B &12C) is installed above the plate type catalyst (11) and the soot is cleaned with help of compressed air (14) through nozzles (13) provided in the same plane on soot blowing system (12A, 12B &12C).

[0037] It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims.