CN110508133B - Industrial flue gas desulfurization, denitrification and dust removal integrated system and process method thereof - Google Patents

Industrial flue gas desulfurization, denitrification and dust removal integrated system and process method thereof Download PDF

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Publication number
CN110508133B
CN110508133B CN201910914322.XA CN201910914322A CN110508133B CN 110508133 B CN110508133 B CN 110508133B CN 201910914322 A CN201910914322 A CN 201910914322A CN 110508133 B CN110508133 B CN 110508133B
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air
unit
plate
denitration
shell
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CN110508133A (en
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崔小勤
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NINGXIA SANYUAN ZHONGTAI METALLURGY Co.,Ltd.
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Ningxia Sanyuan Zhongtai Metallurgy Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/869—Multiple step processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

The invention discloses an industrial flue gas desulfurization, denitrification and dust removal integrated system, which comprises a boiler, a denitrification unit, a dust removal unit and a desulfurization unit; the denitration unit, the dust removal unit and the desulfurization unit are sequentially communicated and arranged on a discharge path of the boiler flue gas; the denitration unit is communicated with the outlet end of the mixing cavity; the inlet end of the mixing cavity is communicated with a liquid ammonia evaporation unit and a dilution fan; the denitration unit comprises a shell; the loading plate group is filled in the shell; denitration catalysts are attached and distributed on the loading plate group; one end of the gas pipe close to the denitration unit penetrates through the shell, and a gas injection block extends inwards; the plurality of air injection blocks are uniformly arranged at the edge of the feed port in the circumferential direction; after the ammonia gas and air mixture is sprayed out, the ammonia gas and the air mixture can rapidly flow and mix synchronously with flowing flue gas, so that the requirement on the conveying pressure of a gas conveying pipe is reduced, and the pipe cost and the energy loss of movable equipment are saved.

Description

Industrial flue gas desulfurization, denitrification and dust removal integrated system and process method thereof
Technical Field
The invention relates to the field of industrial flue gas treatment, in particular to an industrial flue gas desulfurization, denitrification and dust removal integrated system and a process method thereof.
Background
When the existing desulfurization and denitrification equipment is used for flue gas denitrification treatment, the catalyst is usually arranged only by adopting one of honeycomb type or corrugated plate type structures, and the denitrification efficiency is lower. Therefore, the industrial flue gas desulfurization, denitrification and dust removal integrated system with high denitrification efficiency and low pipe material cost is needed to be invented.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides an integrated system for desulfurization, denitrification and dust removal of industrial flue gas, which has high denitrification efficiency and low pipe material cost.
The technical scheme is as follows: in order to achieve the aim, the industrial flue gas desulfurization, denitrification and dust removal integrated system comprises a boiler, a denitrification unit, a dust removal unit and a desulfurization unit; the denitration unit, the dust removal unit and the desulfurization unit are sequentially communicated and arranged on a discharge path of the boiler flue gas; the denitration unit is communicated with the outlet end of the mixing cavity; the inlet end of the mixing cavity is communicated with a liquid ammonia evaporation unit and a dilution fan; the outlet end of the desulfurization unit is communicated with a chimney;
the denitration unit comprises a shell; the two ends of the shell along the length direction are respectively provided with a feed inlet and a discharge outlet; the loading plate group is filled in the shell; denitration catalysts are attached and distributed on the loading plate group; a gas pipe is communicated with the side wall of one end of the shell close to the feed inlet; one end of the gas pipe, which is far away from the shell, is communicated with the mixing cavity; one end of the gas pipe close to the denitration unit penetrates through the shell, and a gas injection block extends inwards; the plurality of air injection blocks are uniformly arranged at the edge of the feed port in the circumferential direction; an air valve is correspondingly arranged on the air delivery pipe; and a flow sensor is arranged on the feeding hole.
Further, the air injection block comprises an air injection cavity and a turning plate; the corresponding end of the gas transmission pipe is communicated with the gas injection cavity; the opening of the air spraying cavity is arranged on one side facing the discharge hole; the turning plate is hinged at the opening of the air spraying cavity, and the opening direction of the turning plate corresponds to the air outlet path of the feeding hole; the two ends of the turning plate along the length of the rotating shaft are connected with guard plates; the guard plate is attached to the inner wall of the corresponding side of the air injection cavity; an arc-shaped hole is formed in the guard plate along the rotating path of the turning plate; a limiting column is embedded on the inner wall of the air spraying cavity corresponding to the arc-shaped hole; the limiting column extends through the arc-shaped hole and is correspondingly matched with the rotating path of the limiting column.
Further, the gas delivery pipe comprises a cladding and a composite core; the cladding is arranged outside the composite core body in a cladding mode; a first channel, a second channel and a third channel are arranged in the composite core body in a parallel and through manner; the air inlet end of the first channel is communicated with the mixing cavity, and the air outlet end of the first channel is communicated with the air injection cavity; the air inlet end of the second channel is communicated with an auxiliary air pump, and the air outlet end of the second channel is communicated with the air injection cavity; the air outlet end of the third channel is communicated with the air injection cavity, and the air inlet end is left vacant for standby; a first sampling tube is communicated with the mixing cavity; a second sampling tube is communicated with the gas spraying cavity; one end of the second sampling tube, which is far away from the air spraying cavity, extends to the outside of the shell.
Further, the loading plate group comprises a first stack and a second stack; the first stacking body and the second stacking body are arranged along the length direction of the shell; a transition unit is arranged between the first stack body and the second stack body; the transition unit comprises a cover body; the cover body is of a hollow structure; a first air hole is arranged on one side, facing the feeding hole, of the cover body in a penetrating manner; a second air hole is arranged on one side, facing the discharge hole, of the cover body in a penetrating manner; a baffle is arranged in the cover body; the plate surface of the baffle is vertical to the length direction of the shell; the baffles are arranged in the cover body along the length direction of the shell at intervals in a staggered manner to form S-shaped channels; and a denitration catalyst is arranged on the surface of the baffle.
Further, the first stack and the second stack are identical in structure; the first stack comprises a corrugated plate, a first side plate and a second side plate; the corrugated plates are horizontally arranged; the plurality of corrugated plates are stacked along the height direction; a plurality of first sliding grooves are formed in one side, facing the corrugated plate, of the first side plate; the corrugated plate is correspondingly matched with the first sliding groove; a second sliding groove is formed in one side, facing the corrugated plate, of the second side plate; one side of the corrugated plate, which is far away from the first sliding groove, is correspondingly matched with the second sliding groove; one side of the second side plate, which is back to the corrugated plate, is provided with an embedded groove; fastening belts are bundled around the first side plate and the second side plate; a plurality of positioning holes are formed in the fastening belt at intervals along the length direction of the fastening belt; the fastening belt is correspondingly embedded in the embedding groove; the bottom of the caulking groove is provided with a screw hole; the screw hole corresponds to the fastening belt; the positioning hole is correspondingly embedded with a stud; the stud is correspondingly matched with the screw hole; and one end of the stud, which is far away from the caulking groove, is lower than the edge of the caulking groove.
Further, a flow equalizing plate is arranged in the shell; the flow equalizing plates are arranged in pairs and are respectively positioned at the front end and the rear end of the transition unit; an air guide groove is formed in one side, facing the feeding hole, of the flow equalizing plate; the bottom of the air inducing groove is provided with a vent hole and a partition strip; the plurality of ventilation holes are concentrically distributed in a plurality of circles around the center of the air inducing groove; the partition strips are correspondingly arranged between two adjacent circles of vent holes; gaps are reserved between adjacent partition strips in the same circle; the bottom of the air inducing groove is of a central convex structure.
Furthermore, a first groove piece and a second groove piece are arranged at the top of the inner wall of the shell along the length direction of the shell at intervals; the bottom of the inner wall of the shell is provided with a third groove piece and a fourth groove piece at intervals along the length direction of the shell; the first groove piece and the third groove piece are correspondingly clamped on one side of the transition unit facing the feed port; the second groove piece and the fourth groove piece are correspondingly clamped on one side of the transition unit facing the discharge hole; flow equalizing plates are respectively embedded between the first trough member and the third trough member and between the second trough member and the fourth trough member; the side surface of the shell is provided with an opening, and a sealing plate is arranged at the opening in a matching manner.
Further, the process method of the industrial flue gas desulfurization, denitrification and dust removal integrated system comprises the following steps,
firstly, conveying flue gas in a boiler into a denitration unit by a fan; meanwhile, the dilution fan conveys the mixture of ammonia gas and air into the air injection cavity from the first channel, and then pushes the turning plate to reach the area near the feed inlet;
mixing the ammonia gas and the air from the mixing cavity with the flue gas entering the shell near the feed inlet, and then entering the first stack body; under the action of catalyst on the surface of corrugated plate, part of NO and NO in the flue gas2Reacting with ammonia gas to generate nitrogen and water, thereby realizing partial denitration;
thirdly, after the flue gas mixture subjected to the primary denitration reaction impacts the surface of the first flow equalizing plate, the flue gas mixture is dispersed from the center to the periphery along the gradient of the bottom of the air inducing groove; in the dispersing process, part of mixed gas is blocked by the partition strips and passes through the plate surface from the nearby vent holes, and the other part of mixed gas passes through gaps among the partition strips to be continuously diffused;
step four, the mixed gas passing through the first flow equalizing plate continuously flows, enters the cover body from the first gas hole and flows along the S-shaped channel formed by the plurality of baffles; in the flowing process, under the action of a denitration catalyst on the surface of the baffle, ammonia gas, part of NO and part of NO in the mixed gas2Continuing the denitration reaction in the second step, and then leaving the transition unit from the second air holes;
step five, the mixed gas after the secondary denitration reaction is collided with a second flow equalizing plate after leaving the transition unit, and then the dispersion process in the step three is repeated, and the mixed gas returns to the uniform state again;
step six, the mixed gas enters a second stack body, and then the denitration reaction process in the step two is repeated, so that three times of denitration reaction is completed;
step seven, the mixed gas after denitration leaves the denitration unit from a discharge hole, and then enters the dust removal unit to filter solid particles in the mixed gas;
and step eight, enabling the mixed gas after dust removal to enter a desulfurization unit for desulfurization reaction, and finally discharging the mixed gas from a chimney.
Has the advantages that: the invention discloses an integrated system for desulfurization, denitrification and dust removal of industrial flue gas, which comprises a boiler, a denitrification unit, a dust removal unit and a desulfurization unit; the denitration unit, the dust removal unit and the desulfurization unit are sequentially communicated and arranged on a discharge path of the boiler flue gas; the denitration unit is communicated with the outlet end of the mixing cavity; the inlet end of the mixing cavity is communicated with a liquid ammonia evaporation unit and a dilution fan; the denitration unit comprises a shell; the two ends of the shell along the length direction are respectively provided with a feed inlet and a discharge outlet; the loading plate group is filled in the shell; denitration catalysts are attached and distributed on the loading plate group; a gas pipe is communicated with the side wall of one end of the shell close to the feed inlet; one end of the gas pipe, which is far away from the shell, is communicated with the mixing cavity; one end of the gas pipe close to the denitration unit penetrates through the shell, and a gas injection block extends inwards; the plurality of air injection blocks are uniformly arranged at the edge of the feed port in the circumferential direction; after the ammonia gas and air mixture is sprayed out, the ammonia gas and the air mixture can rapidly flow and mix synchronously with flowing flue gas, so that the requirement on the conveying pressure of a gas conveying pipe is reduced, and the pipe cost and the energy loss of movable equipment are saved.
Drawings
FIG. 1 is a schematic diagram of a system process principle;
FIG. 2 is a schematic view of the overall structure of a denitration unit;
FIG. 3 is a partial detail structure diagram of a denitration unit;
FIG. 4 is a schematic view of the structure of the air injection block;
FIG. 5 is a schematic view of a gas delivery pipe structure;
FIG. 6 is a schematic view of a first stack structure;
FIG. 7 is a schematic diagram of a transition unit structure;
FIG. 8 is a side view showing the internal structure of the denitration unit.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
An industrial flue gas desulfurization, denitrification and dust removal integrated system is shown in figure 1 and comprises a boiler 1, a denitrification unit 2, a dust removal unit 3 and a desulfurization unit 5; the denitration unit 2, the dust removal unit 3 and the desulfurization unit 5 are sequentially communicated and arranged on a discharge path of boiler flue gas; the denitration unit 2 is communicated with the outlet end of the mixing cavity 8; the inlet end of the mixing cavity 8 is communicated with a liquid ammonia evaporation unit 6 and a dilution fan 7; the outlet end of the desulfurization unit 5 is communicated with a chimney; flue gas generated by the boiler 1 firstly enters the denitration unit 2 to complete denitration treatment, then is cooled by the heat exchanger 4, then enters the dedusting unit 3 to screen most solid particles, and then enters the desulfurization unit 5 to perform desulfurization treatment; in addition, the dilution fan 7 conveys air into the mixing chamber 8, and simultaneously blows ammonia gas from the liquid ammonia evaporation unit 6 in the mixing chamber 8 into the denitration unit 2, wherein the ammonia gas and oxygen in the air react with NO and NO in the flue gas under the action of a catalyst2Nitrogen and water are generated through reaction, so that denitration is realized; dust removal unit 3 can purchase dust bag equipment or electrostatic precipitator etc. and desulfurization unit 5 also can purchase current desulfurization equipment from the market, does not describe here in detail.
As shown in fig. 2 and 3, the denitration unit 2 includes a housing 21; the two ends of the shell 21 along the length direction are respectively provided with a feed inlet 201 and a discharge outlet 202; the loading plate group 22 is filled in the shell 21; denitration catalysts are attached and distributed on the loading plate group 22; the side wall of the shell 21 close to one end of the feed inlet 201 is provided with an air conveying pipe 23 in a communicating way; one end of the gas pipe 23 far away from the shell 21 is communicated with the mixing cavity 8; one end of the gas pipe 23 close to the denitration unit 2 penetrates through the shell 21 and extends inwards to form a gas injection block 24; the plurality of air injection blocks 24 are circumferentially and uniformly arranged at the edge of the feeding hole 201; an air valve is correspondingly arranged on the air delivery pipe 23; a flow sensor is arranged on the feeding hole 201, so that the unit time treatment capacity of the system for desulfurization and denitrification is calculated according to the flow of the mixed flue gas; the advantage of arranging the air injection block 24 near the feed inlet 201 is that the mixture of ammonia and air can rapidly flow and mix with the flowing flue gas after being injected, thereby reducing the requirement on the conveying pressure of the gas pipe 23, and saving the pipe cost and the energy loss of the moving equipment.
As shown in fig. 4, the air injection block 24 includes an air injection cavity 241 and a turning plate 242; the corresponding end of the gas transmission pipe 23 is communicated with the gas injection cavity 241; the opening of the air spray chamber 241 is disposed on a side facing the discharge port 202; the turning plate 242 is hinged at the opening of the air injection cavity 241, and the opening direction corresponds to the air outlet path of the feed port 201; the two ends of the turning plate 242 along the length of the rotating shaft are connected with guard plates 243; the guard plate 243 is attached to the inner wall of the corresponding side of the air injection cavity 241; an arc-shaped hole 244 is arranged on the guard plate 243 along the rotating path of the turning plate 242; a limiting column 245 is embedded on the inner wall of the air spraying cavity 241 corresponding to the arc-shaped hole 244; the retaining posts 245 extend through the arcuate apertures 244 to correspondingly engage the rotational path thereof; the guard plate 243 functions to: at first can avoid the gaseous dispersion to both sides of spouting to can mix with the flue gas to the at utmost, secondly can realize turning over the angle control that opens and shuts of board 242 with the help of arc hole 244, thereby ensure that the mist that spouts can keep the slant to accomplish with the flue gas and mix, reduce the perpendicular extra kinetic energy loss that meets or the inclination produces when too big.
As shown in FIG. 5, the air delivery pipe 23 includes a covering shell 233 and a composite core 234; the cladding 233 is arranged outside the composite core 234 in a cladding mode and specifically comprises an insulating layer and a protective layer; the heat-insulating layer wraps the composite core body 234 to prevent the temperature of the gas in the heat-insulating layer from dissipating in the flow; the protective layer is wrapped on the outer side of the heat insulation layer and used for resisting abrasion in daily use; a first channel 235, a second channel 236 and a third channel 237 are arranged in the composite core 234 in a parallel and through manner; the gas inlet end of the first channel 235 is communicated with the mixing cavity 8, and the gas outlet end is communicated with the gas injection cavity 241 and used for conveying mixed gas of ammonia gas and air; the first mentionedAn auxiliary air pump 238 is arranged at the air inlet end of the second channel 236 in a communicating manner, and the air outlet end of the second channel is communicated with an air injection cavity 241; the air outlet end of the third channel 237 is communicated with the air injection cavity 241, and the air inlet end is left vacant for standby; because the boiler 1 produces the denitration target gas contents (NO, NO) in the flue gas depending on the combustion state and the kind of fuel2) The change can be generated, and at the moment, air can be supplemented into the shell 21 in real time through the second channel 236 to deal with the situation that the content of the denitration target gas in the flue gas is reduced, so that the waste of ammonia gas is reduced; when the content of the denitration target gas in the flue gas is increased, the denitration target gas can be adjusted by increasing the conveying speed of the first channel 235; the third channel 237 can be used for sharing the conveying pressure of the first channel 235, so that the pressure borne by the composite core body is reduced, the service life of the composite core body is obviously prolonged, a single channel can be realized by adopting a pipe with relatively low structural strength, and the equipment cost can be obviously reduced; a first sampling tube is communicated with the mixing cavity 8; a second sampling tube is communicated with the air spraying cavity 241; one end of the second sampling tube, which is far away from the air injection cavity 241, extends to the outside of the shell 21; the ammonia content in the conveyed mixed gas can be monitored through the first sampling tube; the content of ammonia gas in the gas injection cavity after the second channel and the third channel are used can be monitored through the second sampling tube, so that the supply amount of gas in each channel can be corrected in time.
The loading plate group 22 includes a first stack 221 and a second stack 222; the first stack 221 and the second stack 222 are arranged along the length direction of the housing 21; a transition unit 25 is arranged between the first stack 221 and the second stack 222; as shown in fig. 7, the transition unit 25 includes a housing 251; the cover 251 has a hollow structure; a first air hole 252 is arranged on one side of the cover body 251 facing the feed inlet 201 in a penetrating way; a second air hole 253 is arranged on one side of the cover body 251 facing the discharge hole 202 in a penetrating way; a baffle 254 is arranged inside the cover 251; the plate surface of the baffle 254 is perpendicular to the length direction of the shell 21; the baffles 254 are arranged in the cover 251 along the length direction of the shell 21 at intervals in a staggered manner to form an S-shaped channel; a denitration catalyst is arranged on the surface of the baffle 254; the S-shaped channel structure can ensure that the airflow is fully contacted with the plate surface of the baffle 254, so that the S-shaped channel structure is used as a supplement for the upstream and downstream loading plate groups 22, and the integral denitration capacity is obviously improved;
the first stack 221 and the second stack 222 are identical in structure; as shown in fig. 6, the first stack 221 includes a corrugated plate 203, a first side plate 204, and a second side plate 205; the corrugated plate 203 is horizontally arranged, and the contact area between the plate surface and the airflow can be increased in a limited space by utilizing the folded curved surface; a plurality of corrugated plates 203 are stacked along the height direction; a plurality of first sliding grooves 206 are formed in one side, facing the corrugated plate 203, of the first side plate 204; the corrugated plate 203 is correspondingly matched with the first sliding groove 206; a second sliding groove 207 is formed on one side of the second side plate 205 facing the corrugated plate 203; the side of the corrugated plate 203 far away from the first sliding groove 206 is correspondingly matched with the second sliding groove 207; the chute structure can obviously simplify the disassembly and assembly process, and is convenient for replacing and maintaining local corrugated plates; a caulking groove 208 is arranged on one side of the second side plate 205, which is opposite to the corrugated plate 203; fastening belts 209 are tied around the first side plate 204 and the second side plate 205, so that the side plates at two sides can be prevented from sliding relatively in the process of carrying; during processing, the first sliding groove 206 and the second sliding groove 207 can be processed to extend to the side surface from one side, the other side is not through, and the openings of the first sliding groove 206 and the second sliding groove 207 are opposite when the two side plates are matched, so that relative sliding between the corrugated plate and the side plates can be effectively prevented, and the fixing effect of the fastening belt 209 is matched to realize the stable integral structure of the stack body; a plurality of positioning holes 210 are arranged on the fastening belt 209 at intervals along the length direction of the fastening belt; the fastening belt 209 is correspondingly embedded in the embedding groove 208; the bottom of the caulking groove 208 is provided with a screw hole 211; the screw holes 211 correspond to the fastening belts 209 in position; the positioning hole 210 is correspondingly embedded with a stud; the stud is correspondingly matched with the screw hole 211; one end of the stud, which is far away from the caulking groove 208, is lower than the edge of the caulking groove 208, so that gaps are prevented from being generated between the periphery of the stack body and the side wall part of the shell 21; during assembly, the first side plate 204 can be horizontally placed, then the plurality of corrugated plates 203 are correspondingly vertically embedded in the first sliding groove 206, and finally the second side plate 205 is assembled; finally, the fastening tape 209 is installed, and the stack is integrally inserted into the housing 21.
A flow equalizing plate 26 is also arranged in the shell 21; as shown in fig. 8, the flow equalizing plates 26 are arranged in pairs, and are respectively located at the front end and the rear end of the transition unit 25; as shown in fig. 2, an air inducing groove 261 is arranged on one side of the flow equalizing plate 26 facing the feed inlet 201; the bottom of the air inducing groove 261 is of a central convex structure, and air flow can be guided to the peripheral area of the center through gradient after impacting the center of the air inducing groove 261; the bottom of the air inducing groove 261 is provided with a vent hole 262 and a partition strip 263; a plurality of the vent holes 262 are concentrically distributed in a plurality of circles around the center of the air inducing groove 261, and air flow passes through the vent holes 262 in the dispersion process; the isolating strips 263 are correspondingly arranged between two adjacent circles of the vent holes 262; gaps are reserved between adjacent partition strips 263 in the same circle, so that a part of airflow is blocked in the airflow dispersion process, sufficient airflow can also pass through the ventilation holes 262 which are close to the center of the air inducing groove 261, and the airflow can uniformly pass through the plate surface as a whole; thereby can improve the effective contact area of follow-up denitration structure and air current, promote whole operating efficiency.
As shown in fig. 8, a first groove 271 and a second groove 272 are arranged at intervals along the length direction of the top of the inner wall of the housing 21; the bottom of the inner wall of the shell 21 is provided with a third groove 273 and a fourth groove 274 at intervals along the length direction; the first tank part 271 and the third tank part 273 are correspondingly clamped on one side of the transition unit 25 facing the feed port 201; the second groove member 272 and the fourth groove member 274 are correspondingly clamped on one side of the transition unit 25 facing the discharge port 202; flow equalizing plates 26 are respectively embedded between the first trough member 271 and the third trough member 273 and between the second trough member 272 and the fourth trough member 274; the side surface of the shell 21 is provided with an opening, and a sealing plate is arranged at the opening in a matching manner;
in the assembly, the sealing plate of the housing 21 is opened; then the first stack body 221 is correspondingly embedded between the feed port 201 and the adjacent flow equalizing plate 26; the second stack body 222 is correspondingly embedded between the discharge port 202 and the adjacent flow equalizing plate 26; the transition unit 25 is correspondingly embedded between the two flow equalizing plates; and finally, installing the sealing plate again to complete the assembly of the denitration unit.
The technological process of integrated industrial fume desulfurizing, denitrating and dedusting system includes the following steps,
firstly, conveying flue gas in a boiler 1 to a denitration unit 2 by a fan; meanwhile, the dilution fan 7 conveys the mixture of ammonia gas and air into the air injection cavity 241 through the first channel 235, and then the turning plate 242 is pushed to reach the area near the feed port 201;
step two, the ammonia gas and the air from the mixing chamber 8 are mixed with the flue gas entering the shell 21 near the feed port 201, and then enter the first stack body 221; part of NO and NO in the flue gas under the action of the catalyst on the surface of the corrugated plate 2032Reacting with ammonia gas to generate nitrogen and water, thereby realizing partial denitration;
step three, after the flue gas mixture subjected to the primary denitration reaction impacts the surface of the first flow equalizing plate 26, the flue gas mixture is dispersed from the center to the periphery along the gradient of the bottom of the air guide groove 261; in the dispersing process, part of the mixed gas is blocked by the blocking strips 263 and passes through the plate surface from the nearby vent holes 262, and the other part of the mixed gas continues to diffuse through gaps between the blocking strips 263;
step four, the mixed gas passing through the first flow equalizing plate 26 continuously flows into the cover 251 from the first gas holes 252 and flows along the S-shaped channel formed by the plurality of baffles 254; in the flowing process, under the action of the denitration catalyst on the surface of the baffle 254, ammonia gas in the mixed gas and part of NO and NO2Continuing the denitration reaction in the second step, and then leaving the transition unit 25 from the second air holes 253;
step five, the mixed gas after the secondary denitration reaction is separated from the transition unit 25 and then impacts the second flow equalizing plate 26, and then the dispersion process in the step three is repeated, and the mixed gas returns to the uniform state again;
step six, the mixed gas then enters the second stack 222, and the denitration reaction process in the step two is repeated, so that three denitration reactions are completed;
step seven, the mixed gas after denitration leaves the denitration unit 2 from the discharge port 202, and then enters the dust removal unit 3 to filter solid particles in the mixed gas;
and step eight, enabling the mixed gas after dust removal to enter a desulfurization unit for desulfurization reaction, and finally discharging the mixed gas from a chimney.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (7)

1. Industry flue gas desulfurization denitration, dust removal integration system, its characterized in that: comprises a boiler (1), a denitration unit (2), a dust removal unit (3) and a desulfurization unit (5); the denitration unit (2), the dedusting unit (3) and the desulfurization unit (5) are sequentially communicated and arranged on a discharge path of boiler flue gas; the denitration unit (2) is communicated with the outlet end of the mixing cavity (8); the inlet end of the mixing cavity (8) is communicated with a liquid ammonia evaporation unit (6) and a dilution fan (7); the outlet end of the desulfurization unit (5) is communicated with a chimney;
the denitration unit (2) comprises a shell (21); a feed port (201) and a discharge port (202) are respectively arranged at two ends of the shell (21) along the length direction; a loading plate group (22) is filled in the shell (21); denitration catalysts are attached and distributed on the loading plate group (22); the side wall of one end of the shell (21) close to the feed inlet (201) is communicated with an air conveying pipe (23); one end of the gas pipe (23) far away from the shell (21) is communicated with the mixing cavity (8); one end of the gas pipe (23) close to the denitration unit (2) penetrates through the shell (21), and a gas injection block (24) extends inwards; the plurality of air injection blocks (24) are uniformly arranged at the edge of the feed port (201) in the circumferential direction; an air valve is correspondingly arranged on the air delivery pipe (23); a flow sensor is arranged on the feeding hole (201);
the loading plate group (22) comprises a first stack (221) and a second stack (222); the first stack (221) and the second stack (222) are arranged along the length direction of the shell (21); a transition unit (25) is arranged between the first stack body (221) and the second stack body (222); the transition unit (25) comprises a cover (251); the cover body (251) is of a hollow structure; a first air hole (252) is arranged on one side, facing the feed port (201), of the cover body (251) in a penetrating manner; a second air hole (253) is arranged on one side, facing the discharge hole (202), of the cover body (251) in a penetrating way; a baffle (254) is arranged in the cover body (251); the plate surface of the baffle (254) is vertical to the length direction of the shell (21); the baffles (254) are arranged in the cover body (251) along the length direction of the shell (21) at intervals in a staggered manner to form S-shaped channels; the surface of the baffle (254) is provided with a denitration catalyst.
2. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 1, characterized in that: the air injection block (24) comprises an air injection cavity (241) and a turning plate (242); the corresponding end of the air conveying pipe (23) is communicated with the air spraying cavity (241); the opening of the air spraying cavity (241) is arranged on one side facing the discharge hole (202); the turning plate (242) is hinged to an opening of the air spraying cavity (241), and the opening direction of the turning plate corresponds to the air outlet path of the feeding hole (201); the two ends of the turning plate (242) along the length of the rotating shaft are connected with guard plates (243); the guard plate (243) is attached to the inner wall of the corresponding side of the air spraying cavity (241); an arc-shaped hole (244) is formed in the guard plate (243) along the rotating path of the turning plate (242); a limiting column (245) is embedded on the inner wall of the air spraying cavity (241) corresponding to the arc-shaped hole (244); the restraining posts (245) extend through the arcuate apertures (244) to correspondingly engage the rotational path thereof.
3. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas as claimed in claim 2, wherein: the gas delivery pipe (23) comprises a cladding (233) and a composite core (234); the cladding (233) is arranged outside the composite core (234) in a cladding mode; a first channel (235), a second channel (236) and a third channel (237) are arranged in the composite core body (234) in a parallel and through mode; the air inlet end of the first channel (235) is communicated with the mixing cavity (8), and the air outlet end of the first channel is communicated with the air injection cavity (241); an auxiliary air pump (238) is arranged at the air inlet end of the second channel (236) in a communicating manner, and the air outlet end of the second channel is communicated with the air injection cavity (241); the air outlet end of the third channel (237) is communicated with the air spraying cavity (241), and the air inlet end is left vacant for standby; a first sampling tube is communicated with the mixing cavity (8); a second sampling tube is communicated with the air spraying cavity (241); one end of the second sampling tube, which is far away from the air spraying cavity (241), extends to the outside of the shell (21).
4. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas as claimed in claim 3, wherein: the first stack (221) and the second stack (222) are identical in structure; the first stack (221) comprises a corrugated plate (203), a first side plate (204) and a second side plate (205); the corrugated plate (203) is horizontally arranged; the corrugated plates (203) are stacked along the height direction; a plurality of first sliding grooves (206) are formed in one side, facing the corrugated plate (203), of the first side plate (204); the corrugated plate (203) is correspondingly matched with the first sliding groove (206); a second sliding groove (207) is formed in one side, facing the corrugated plate (203), of the second side plate (205); one side of the corrugated plate (203) far away from the first sliding groove (206) is correspondingly matched with the second sliding groove (207); one side of the second side plate (205), which is back to the corrugated plate (203), is provided with a caulking groove (208); fastening belts (209) are arranged around the first side plate (204) and the second side plate (205) in a bundling manner; a plurality of positioning holes (210) are arranged on the fastening belt (209) at intervals along the length direction of the fastening belt; the fastening belt (209) is correspondingly embedded in the embedding groove (208); the bottom of the caulking groove (208) is provided with a screw hole (211); the screw hole (211) corresponds to the fastening belt (209); the positioning hole (210) is correspondingly embedded with a stud; the stud is correspondingly matched with the screw hole (211); the end of the stud far away from the caulking groove (208) is lower than the edge of the caulking groove (208).
5. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas as claimed in claim 4, wherein: a flow equalizing plate (26) is also arranged in the shell (21); the flow equalizing plates (26) are arranged in pairs and are respectively positioned at the front end and the rear end of the transition unit (25); an air guide groove (261) is formed in one side, facing the feeding hole (201), of the flow equalizing plate (26); the bottom of the air guide groove (261) is provided with a vent hole (262) and a partition strip (263); a plurality of the vent holes (262) are concentrically distributed in a plurality of circles around the center of the air guide groove (261); the partition strip (263) is correspondingly arranged between two adjacent circles of ventilation holes (262); gaps are reserved between adjacent partition strips (263) in the same circle; the bottom of the air guide groove (261) is of a central convex structure.
6. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 5, characterized in that: the top of the inner wall of the shell (21) is provided with a first groove member (271) and a second groove member (272) at intervals along the length direction of the shell; the bottom of the inner wall of the shell (21) is provided with a third groove member (273) and a fourth groove member (274) at intervals along the length direction of the shell; the first tank part (271) and the third tank part (273) are correspondingly clamped on one side, facing the feed port (201), of the transition unit (25); the second groove member (272) and the fourth groove member (274) are correspondingly clamped on one side, facing the discharge hole (202), of the transition unit (25); flow equalizing plates (26) are respectively embedded between the first tank piece (271) and the third tank piece (273) and between the second tank piece (272) and the fourth tank piece (274); the side surface of the shell (21) is provided with an opening, and a sealing plate is arranged at the opening in a matching way.
7. The process method of the industrial flue gas desulfurization, denitrification and dust removal integrated system according to any one of claims 5 to 6, characterized in that: comprises the following steps of (a) carrying out,
firstly, conveying flue gas in a boiler (1) to a denitration unit (2) by a fan; meanwhile, the dilution fan (7) conveys the mixture of ammonia gas and air into the air spraying cavity (241) through the first channel (235), and then the turnover plate (242) is pushed to reach the area near the feed port (201);
step two, mixing the ammonia gas and the air from the mixing chamber (8) with the flue gas entering the shell (21) near the feed port (201), and then entering the first stack body (221); part of NO and NO in the smoke is under the action of a catalyst on the surface of the corrugated plate (203)2Reacting with ammonia gas to generate nitrogen and water, thereby realizing partial denitration;
thirdly, after the flue gas mixture subjected to the primary denitration reaction impacts the surface of the first flow equalizing plate (26), the flue gas mixture is dispersed from the center to the periphery along the gradient of the bottom of the air guide groove (261); in the dispersion process, part of mixed gas is blocked by the blocking strips (263) and passes through the plate surface from the nearby vent holes (262), and the other part of mixed gas continues to diffuse through gaps between the blocking strips (263);
step four, mixing the mixture passing through the first flow equalizing plate (26)The gas flows continuously, enters the cover body (251) from the first air hole (252) and flows along an S-shaped channel formed by a plurality of baffles (254); in the flowing process, under the action of a denitration catalyst on the surface of the baffle (254), ammonia gas in the mixed gas and part of NO and NO2Continuing the denitration reaction in the second step, and then leaving the transition unit (25) from the second air holes (253);
step five, the mixed gas after the secondary denitration reaction is separated from the transition unit (25) and then impacts a second flow equalizing plate (26), and then the dispersion process in the step three is repeated, and the mixed gas returns to the uniform state again;
step six, the mixed gas enters a second stack body (222), and then the denitration reaction process in the step two is repeated, so that three times of denitration reaction is completed;
seventhly, the mixed gas after denitration leaves the denitration unit (2) from the discharge hole (202), and then enters the dust removal unit (3) to filter solid particles in the mixed gas;
and step eight, enabling the mixed gas after dust removal to enter a desulfurization unit for desulfurization reaction, and finally discharging the mixed gas from a chimney.
CN201910914322.XA 2019-09-26 2019-09-26 Industrial flue gas desulfurization, denitrification and dust removal integrated system and process method thereof Active CN110508133B (en)

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Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556823A (en) * 1978-10-19 1980-04-26 Daikin Ind Ltd Catalytic oxidation apparatus
JPH11197517A (en) * 1998-01-08 1999-07-27 Honda Motor Co Ltd Metallic carrier for catalyst
DE19908834A1 (en) * 1999-03-01 2000-09-07 Emitec Emissionstechnologie Catalytic converter arrangement with catalyst carrier bodies and device and method for their production
CN2420546Y (en) * 2000-03-02 2001-02-21 中国人民解放军兰州军区司令部工程科研设计所 Air cleaner
US6315963B1 (en) * 2000-03-22 2001-11-13 Samuel E. Speer Method and apparatus for the enhanced treatment of fluids via photolytic and photocatalytic reactions
CN2499586Y (en) * 2001-10-26 2002-07-10 宋璞 Combined purifier fo diesel engine tail gas
KR20060093086A (en) * 2006-07-24 2006-08-23 김문찬 Catalyst and device for air cleaning
CN101402055B (en) * 2008-10-30 2011-07-27 重庆大学 Ribbed catalyst structure
CN203448002U (en) * 2013-08-26 2014-02-26 成都华西化工研究所股份有限公司 Venturi tube jet gas mixer
CN104147733A (en) * 2014-07-31 2014-11-19 成都自能消防设备有限公司 Gas-liquid mixing device
US9764286B2 (en) * 2014-12-03 2017-09-19 Ford Global Technologies, Llc Zoned catalyst system for reducing N2O emissions
CN105368479B (en) * 2015-10-16 2023-12-19 中国石油大学(北京) Novel glidant technology for promoting oil agent mixing in feeding area of catalytic cracking riser
EP3412882B1 (en) * 2016-02-04 2020-11-18 Amogreentech Co., Ltd. Catalyst carrier module for large-capacity catalytic reactor
CN207507243U (en) * 2017-09-22 2018-06-19 龙正环保股份有限公司 A kind of denitration of boiler smoke dust-extraction unit
CN109772162A (en) * 2017-11-13 2019-05-21 扬州市思源净水设备有限公司 A kind of new packing catalytic plate

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