CN117339368A - Denitration device for flue gas treatment of adaptable regulation - Google Patents
Denitration device for flue gas treatment of adaptable regulation Download PDFInfo
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- CN117339368A CN117339368A CN202311647930.1A CN202311647930A CN117339368A CN 117339368 A CN117339368 A CN 117339368A CN 202311647930 A CN202311647930 A CN 202311647930A CN 117339368 A CN117339368 A CN 117339368A
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- pipe
- flue gas
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- fixedly communicated
- half area
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000003546 flue gas Substances 0.000 title claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 28
- 239000003638 chemical reducing agent Substances 0.000 claims description 25
- 239000000446 fuel Substances 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/005—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 by heat treatment
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- 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
- B01D53/346—Controlling the process
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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 relates to the technical field of flue gas denitration, and provides an adaptively adjustable flue gas treatment denitration device which comprises a flue gas inlet pipe, a flue gas denitration reaction barrel, a spraying component and a high-temperature heating component, wherein the flue gas denitration reaction barrel comprises an upper half area and a lower half area, support legs are fixedly arranged on the outer wall of the lower half area, the flue gas inlet pipe is fixedly communicated with the lower half area, the spraying component is arranged in the upper half area, the high-temperature heating component is arranged between the lower half area and the upper half area, and the high-temperature heating component is fixedly communicated with the upper half area.
Description
Technical Field
The invention relates to the technical field of flue gas denitration, in particular to an adaptively-adjustable flue gas treatment denitration device.
Background
Flue gas denitration is mainly divided into two types, namely a dry method and a wet method, wherein SNCR (selective non-catalytic reduction denitration method) of the dry flue gas denitration technology is widely used by virtue of the mature and low cost characteristics, and takes a hearth or a pre-decomposing furnace in the cement industry as a reactor, and contains NH (NH) 3 Is sprayed into the flue, and the reducing agent and NO in the flue gas X Reacting to form N 2 And water.
Since the process does not use a catalyst, the reaction must be carried out at high temperature (900-1100 ℃), and at too low a temperature, the process is NH 3 Incomplete reaction, easy NH formation 3 Leakage, while in case of too high a temperature, NH 3 Is easily oxidized to NO X Counteract NH 3 Thus, the process leads to a loss of reducing agent and NO in case of too high or too low a temperature X The problem that the desorption rate descends, this application provides an adaptable adjustable flue gas treatment uses denitrification facility.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an adaptively adjustable denitration device for flue gas treatment, which solves the problems that the prior art in the background art can cause the loss of reducing agent and NO under the condition of overhigh or overlow temperature X The removal rate is reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions:
denitration for flue gas treatment capable of being adjusted adaptivelyThe device comprises a flue gas inlet pipe, be provided with the ooff valve on the flue gas inlet pipe, still include flue gas denitration reaction barrel, spray subassembly and high temperature heating assembly, flue gas denitration reaction barrel includes first half district and second half district, fixed mounting has the stabilizer blade on the outer wall in second half district, the flue gas inlet pipe with second half district fixed intercommunication, the top in first half district is fixed to be linked together has the discharge pipe, spray the subassembly and install in the first half district for evenly spray to the flue gas and contain NH 3 The high-temperature heating component is arranged between the lower half area and the upper half area, is fixedly communicated with the upper half area and is used for controlling the reaction temperature;
spreading the spraying assembly and the high-temperature heating assembly, wherein the spraying assembly comprises:
a reducing agent inlet pipe penetrating through a sidewall of the upper half, and installed on the sidewall of the upper half;
the first electric stop valve is arranged on the reducing agent inlet pipe;
the reducing agent inlet pipe is fixedly communicated with the spraying head;
wherein the high temperature heating assembly comprises:
the first fixed pipe is fixedly communicated with the upper half area, and an air inlet disc is arranged in the first fixed pipe;
the heating spray gun is arranged on the side wall of the first fixed pipe, and a spray head of the heating spray gun is positioned in the first fixed pipe;
the temperature measuring gun is arranged on the side wall of the first fixed pipe, and the gun head of the temperature measuring gun is positioned in the first fixed pipe;
the combustion-supporting component is arranged on the outer wall of the first fixed pipe and is fixedly communicated with the heating spray gun;
wherein, the heating spray gun includes:
the gun body is arranged on the side wall of the first fixed pipe;
the igniter is arranged on the outer wall of the gun body;
the fuel pipe is fixedly communicated with the gun body;
a second electrically operated shut-off valve mounted on a side wall of the fuel pipe;
wherein, the combustion-supporting subassembly includes:
the air pump is arranged on the outer wall of the first fixed pipe;
the air pre-storing pipe is arranged on the outer wall of the first fixed pipe, and the air outlet end of the air pump is fixedly communicated with the air pre-storing pipe;
the air pre-storing pipe is communicated with the gun body through the air inlet pipe;
and the third electric stop valve is arranged on the side wall of the air inlet pipe.
In order to heat the flue gas that just gets into flue gas denitration reaction barrel, make the flue gas reach the standard temperature of SNCR reaction, the going on of follow-up reaction of being convenient for, as this application further optional technical scheme, still include flue gas preheating component, flue gas preheating component includes:
the lower end of the second fixed pipe is fixedly communicated with the lower half area, and the top end of the second fixed pipe is fixedly communicated with the first fixed pipe;
the resistance heating piece is provided with a plurality of air inlets and is arranged on the inner side wall of the second fixed pipe;
and the connecting pipe penetrates through the resistance heating sheet, and wires are arranged on two sides of the connecting pipe.
In order to cool the water vapor generated in the SNCR reaction so as to facilitate the subsequent discharge, as a still further alternative solution of the present application, a cooling assembly is further included, and the cooling assembly includes:
the cooling cylinder is of a double-layer structure and is fixedly communicated with the discharge pipe;
the liquid injection pipe is fixedly communicated with the outer wall of the cooling cylinder, and a fourth electric stop valve is arranged on the liquid injection pipe;
the liquid discharge pipe is fixedly communicated with the outer wall of the cooling cylinder, and a fifth electric stop valve is arranged on the liquid discharge pipe.
In order to carry out classification discharge to vapor and mixed gas after denitration, on the basis of the aforesaid scheme, still include the discharge subassembly, the discharge subassembly includes:
a discharge manifold in fixed communication with the cooling cartridge;
the bottom end of the discharging main pipe is fixedly communicated with the pre-storing tank, and a guide plate is fixedly arranged in the pre-storing tank;
the first discharge branch pipe is fixedly communicated with the bottom end of the pre-storage tank, and a sixth electric stop valve is arranged on the first discharge branch pipe;
and the second discharge branch pipe is communicated with the discharge main pipe, and an exhaust fan is arranged on the inner side wall of the second discharge branch pipe.
Compared with the prior art, the invention provides an adaptively adjustable denitration device for flue gas treatment, which has the following beneficial effects:
1. in the present invention, NH is contained by the spray head 3 The reducing agent is uniformly sprayed in the flue gas, the reducing agent is heated by a heating spray gun to reach the temperature required by the reaction, the temperature of the reaction is measured by a temperature measuring gun, and when the temperature is too high or too low, the temperature is adaptively adjusted by controlling the fuel supply quantity and the air supply quantity of a fuel pipe, so that the reaction temperature is always kept between 900 ℃ and 1100 ℃, and the flue gas denitration efficiency is improved;
2. in the invention, the resistance heating sheet is used for heating the flue gas which just enters the flue gas denitration reaction barrel, so that the temperature of the flue gas reaches 900-1100 ℃, and further, the flue gas can fully react when denitration treatment is carried out, and the flue gas denitration efficiency is further improved;
3. in the present invention, NH is contained 3 Is mixed with NO in flue gas X Reacting to form N 2 And water, which becomes water vapor at high temperature, the water vapor following N 2 The mixed gas moves in the middle of the process of the movement, the mixed gas is slowly cooled to become liquid water, the liquid water is adhered to the inner wall of the pipeline, and the pipeline is easy to rust, so that the cooling cylinder is used for directly cooling water vapor and rapidly discharging the liquid water, and the damage to the pipeline caused by the adhesion of the liquid water to the inner wall of the pipeline is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view in partial cross-section of the cooling assembly and drain assembly of the present invention mated;
FIG. 3 is a schematic diagram of a partial cross-sectional structure of the flue gas denitration reaction barrel, the spraying assembly, the high-temperature heating assembly and the flue gas preheating assembly of the invention;
FIG. 4 is a schematic view of the partial construction of the spray assembly, combustion supporting assembly and flue gas preheating assembly of the present invention in combination;
FIG. 5 is a schematic view of a partial construction of a spray assembly of the present invention;
FIG. 6 is a schematic view of a partial cross-sectional structure of the flue gas preheating assembly of the present invention;
FIG. 7 is a schematic view of the high temperature heating assembly, heating lance and combustion supporting assembly of the present invention in partial cross-section;
fig. 8 is a schematic view of a partial enlarged structure of a in fig. 7 according to the present invention.
Reference numerals in the drawings represent respectively:
100. flue gas denitration reaction barrel; 200. a spray assembly; 300. a high temperature heating assembly; 400. heating the spray gun; 500. a combustion supporting component; 600. a flue gas preheating assembly; 700. a cooling assembly; 800. a discharge assembly;
1. a flue gas inlet pipe; 2. an upper half region; 3. a lower half region; 4. a discharge pipe; 5. a reducing agent inlet pipe; 6. a first electric shut-off valve; 7. a spray head; 8. a first fixed tube; 9. an air inlet disc; 10. a temperature measuring gun; 11. a gun body; 12. an igniter; 13. a fuel pipe; 14. a second electric shut-off valve; 15. an air pump; 16. an air pre-storing tube; 17. an air inlet pipe; 18. a third electric shut-off valve; 19. a second fixed tube; 20. a resistance heating sheet; 21. a connecting pipe; 22. a cooling cylinder; 23. a liquid injection pipe; 24. a fourth electric shutoff valve; 25. a liquid discharge pipe; 26. a fifth electric shutoff valve; 27. a discharge header; 28. pre-storing a box; 29. a deflector; 30. a first discharge branch pipe; 31. a sixth electric shutoff valve; 32. a second discharge branch pipe; 33. and a fan.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 8, an adaptively adjustable denitration device for flue gas treatment comprises a flue gas inlet pipe 1, wherein an on-off valve is arranged on the flue gas inlet pipe 1, and the denitration device further comprises a flue gas denitration reaction barrel 100, a spraying component 200 and a high-temperature heating component 300, wherein the denitration reaction barrel 100 comprises an upper half area 2 and a lower half area 3, support legs are fixedly arranged on the outer wall of the lower half area 3, the flue gas inlet pipe 1 is fixedly communicated with the lower half area 3, a discharge pipe 4 is fixedly communicated with the top end of the upper half area 2, and the spraying component 200 is arranged in the upper half area 2 and is used for uniformly spraying flue gas with NH (NH) 3 The high-temperature heating assembly 300 is arranged between the lower half zone 3 and the upper half zone 2, and the high-temperature heating assembly 300 is fixedly communicated with the upper half zone 2 and is used for controlling the reaction temperature;
wherein the spray assembly 200 comprises a reductant inlet tube 5, a first electrically operated shut-off valve 6 and a spray head 7, the reductant inlet tube 5 extending through the side wall of the upper half 2, and the reductant inlet tube 5 being mounted on the side wall of the upper half 2, the first electrically operated shut-off valve 6 being mounted on the reductant inlet tube 5, the reductant inlet tube 5 being in fixed communication with the spray head 7;
by opening the first electric shutoff valve 6, NH is contained 3 Flows into the spray head 7 through the reducing agent inlet pipe 5, and is uniformly sprayed into the flue gas through the spray head 7 to be matched with NO in the flue gas X Reacting;
the high-temperature heating assembly 300 comprises a first fixed pipe 8, a heating spray gun 400, a temperature measuring gun 10 and a combustion supporting assembly 500, wherein the first fixed pipe 8 is fixedly communicated with the upper half area 2, an air inlet disc 9 is installed in the first fixed pipe 8, the heating spray gun 400 is installed on the side wall of the first fixed pipe 8, a spray head of the heating spray gun 400 is located in the first fixed pipe 8, the temperature measuring gun 10 is installed on the side wall of the first fixed pipe 8, a gun head of the temperature measuring gun 10 is located in the first fixed pipe 8, the combustion supporting assembly 500 is installed on the outer wall of the first fixed pipe 8, and the combustion supporting assembly 500 is fixedly communicated with the heating spray gun 400;
the flue gas and the reducing agent are heated by the heating spray gun 400, so that the reaction between the flue gas and the reducing agent reaches the required temperature, the reducing agent is prevented from falling on the resistance heating sheet 20 by the air inlet disc 9, the temperature of the current reaction is mastered in real time by the temperature measuring gun 10, and the temperature of the current reaction is regulated by the combustion-supporting component 500;
wherein the heating spray gun 400 comprises a gun body 11, an igniter 12, a fuel pipe 13 and a second electric stop valve 14, wherein the gun body 11 is arranged on the side wall of the first fixed pipe 8, the igniter 12 is arranged on the outer wall of the gun body 11, the fuel pipe 13 is fixedly communicated with the gun body 11, and the second electric stop valve 14 is arranged on the side wall of the fuel pipe 13;
fuel is driven into the gun body 11 through the fuel pipe 13 by opening the second electric shut-off valve 14, the fuel is driven into the first fixed pipe 8 through the gun body 11, and the fuel is ignited by starting the igniter 12;
the combustion-supporting assembly 500 comprises an air pump 15, an air pre-storing tube 16, an air inlet tube 17 and a third electric stop valve 18, wherein the air pump 15 is installed on the outer wall of the first fixed tube 8, the air pre-storing tube 16 is installed on the outer wall of the first fixed tube 8, the air outlet end of the air pump 15 is fixedly communicated with the air pre-storing tube 16, the air pre-storing tube 16 is communicated with the gun body 11 through the air inlet tube 17, and the third electric stop valve 18 is installed on the side wall of the air inlet tube 17;
the air pump 15 is started to pump air into the air pre-storing pipe 16, and the third electric stop valve 18 is operated to control the flow rate of the air entering the gun body 11, so that the reaction temperature is adaptively adjusted.
Referring to fig. 3 and 6, in order to heat the flue gas just entering the flue gas denitration reaction barrel 100 to make the flue gas reach the standard temperature of the SNCR reaction, so as to facilitate the subsequent reaction, the flue gas preheating assembly 600 further comprises a flue gas preheating assembly 600, wherein the flue gas preheating assembly 600 comprises a second fixed pipe 19, a resistance heating sheet 20 and a connecting pipe 21, the lower end of the second fixed pipe 19 is fixedly communicated with the lower half area 3, the top end of the second fixed pipe 19 is fixedly communicated with the first fixed pipe 8, the resistance heating sheet 20 is provided with a plurality of air inlets, the resistance heating sheet 20 is mounted on the inner side wall of the second fixed pipe 19, the connecting pipe 21 penetrates through the resistance heating sheet 20, and both sides of the connecting pipe 21 are provided with electric wires;
through connecting the wires at the two sides of the connecting pipe 21 with a power supply, current flows through the resistance heating plate 20 through the connecting pipe 21, so that the temperature of the resistance heating plate 20 is quickly raised, and further, flue gas which just enters the flue gas denitration reaction barrel 100 is preheated when flowing through the resistance heating plate 20, and the required temperature of the reaction is reached.
Referring to fig. 1 and 2, in order to cool the water vapor generated in the SNCR reaction so as to facilitate the subsequent discharge, the cooling device further comprises a cooling assembly 700, wherein the cooling assembly 700 comprises a cooling cylinder 22, a liquid injection pipe 23 and a liquid discharge pipe 25, the cooling cylinder 22 has a double-layer structure, the cooling cylinder 22 is fixedly communicated with the discharge pipe 4, the liquid injection pipe 23 is fixedly communicated with the outer wall of the cooling cylinder 22, a fourth electric stop valve 24 is arranged on the liquid injection pipe 23, the liquid discharge pipe 25 is fixedly communicated with the outer wall of the cooling cylinder 22, and a fifth electric stop valve 26 is arranged on the liquid discharge pipe 25;
by activating the fourth electric shut-off valve 24 and filling the cooling liquid between the outer wall and the inner wall of the cooling cylinder 22 through the liquid filling pipe 23, the water vapor is cooled by the cooling cylinder 22 filled with the cooling liquid, the water vapor is changed into liquid water, and by activating the fifth electric shut-off valve 26, the cooling liquid between the outer wall and the inner wall of the cooling cylinder 22 is discharged from the liquid discharge pipe 25.
Referring to fig. 1 and 2, in order to separate and discharge the mixed gas after the water vapor and the denitration, the device further comprises a discharge assembly 800, wherein the discharge assembly 800 comprises a discharge main pipe 27, a pre-storage tank 28, a first discharge branch pipe 30 and a second discharge branch pipe 32, the discharge main pipe 27 is fixedly communicated with the cooling cylinder 22, the bottom end of the discharge main pipe 27 is fixedly communicated with the pre-storage tank 28, a deflector 29 is fixedly installed in the pre-storage tank 28, the first discharge branch pipe 30 is fixedly communicated with the bottom end of the pre-storage tank 28, a sixth electric stop valve 31 is installed on the first discharge branch pipe 30, the second discharge branch pipe 32 is communicated with the discharge main pipe 27, and an exhaust fan 33 is installed on the inner side wall of the second discharge branch pipe 32;
the liquid water finally falls into the pre-storing tank 28 through the discharging header pipe 27 due to gravity, flows into the first discharging branch pipe 30 through the deflector 29, and is discharged by opening the sixth electric shut-off valve 31, and the mixed gas is discharged through the second discharging branch pipe 32 by the action of the exhaust fan 33.
In summary, the operating principle of the adaptive flue gas treatment denitration device is as follows: firstly, starting the resistance heating plate 20, continuously heating the resistance heating plate 20 to reach a specified temperature (900-1100 ℃), then starting the second electric stop valve 14, driving fuel into the gun body 11 through the fuel pipe 13, driving the fuel into the first fixed pipe 8 through the gun body 11, then starting the igniter 12 to ignite the fuel, and then starting the flue gasThe switch valve on the inlet pipe 1, the flue gas enters the lower half zone 3 through the flue gas inlet pipe 1, the flue gas just entering the lower half zone 3 of the flue gas denitration reaction barrel 100 is preheated when flowing through the resistance heating plate 20 to reach the required temperature (900-1100 ℃), and the preheated flue gas continuously moves upwards, and at the moment, the first electric stop valve 6 is opened to enable the flue gas to contain NH (NH) 3 Flows into the spray head 7 through the reducing agent inlet pipe 5, and is uniformly sprayed into the flue gas through the spray head 7 to be matched with NO in the flue gas X The temperature of the current reaction is grasped in real time by the temperature measuring gun 10 during the reaction, if the reaction temperature is too high or too low, the reaction temperature is kept between 900-1100 ℃ all the time by controlling the fuel supply amount and the air supply amount of the fuel pipe 13 (by controlling the second electric shut-off valve 14 to control the fuel supply amount; by controlling the flow rate of air into the gun body 11 by operating the third electric shut-off valve 18), the mixed gas after denitration is cooled by the cooling cylinder 22 filled with cooling liquid to change water vapor into liquid water, the liquid water finally falls into the pre-storing box 28 by gravity through the discharging manifold 27, flows into the first discharging branch pipe 30 by the deflector 29, and is discharged by opening the sixth electric shut-off valve 31, and the mixed gas is discharged by the second discharging branch pipe 32 by the action of the exhaust fan 33.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an adaptable denitrification facility for flue gas treatment, includes flue gas import pipe (1), be provided with the ooff valve on flue gas import pipe (1), its characterized in that still includes:
the flue gas denitration reaction barrel (100), the flue gas denitration reaction barrel (100) comprises an upper half area (2) and a lower half area (3), support legs are fixedly arranged on the outer wall of the lower half area (3), a flue gas inlet pipe (1) is fixedly communicated with the lower half area (3), and a discharge pipe (4) is fixedly communicated with the top end of the upper half area (2);
a spraying assembly (200), wherein the spraying assembly (200) is arranged in the upper half area (2) and is used for uniformly spraying NH-containing flue gas 3 Is a reducing agent of (a);
the high-temperature heating assembly (300) is arranged between the lower half area (3) and the upper half area (2), and the high-temperature heating assembly (300) is fixedly communicated with the upper half area (2) and is used for controlling the reaction temperature;
the high temperature heating assembly (300) includes:
the first fixed pipe (8), the first fixed pipe (8) is fixedly communicated with the upper half area (2), and an air inlet disc (9) is arranged in the first fixed pipe (8);
a heating spray gun (400), wherein the heating spray gun (400) is arranged on the side wall of the first fixed pipe (8), and a spray head of the heating spray gun (400) is positioned in the first fixed pipe (8);
a temperature measuring gun (10), wherein the temperature measuring gun (10) is arranged on the side wall of the first fixed pipe (8), and the gun head of the temperature measuring gun (10) is positioned in the first fixed pipe (8);
the combustion-supporting assembly (500) is arranged on the outer wall of the first fixed pipe (8), and the combustion-supporting assembly (500) is fixedly communicated with the heating spray gun (400).
2. An adaptable flue gas treatment denitration device according to claim 1, wherein the spraying assembly (200) comprises:
a reducing agent inlet pipe (5), the reducing agent inlet pipe (5) penetrating through the side wall of the upper half section (2), and the reducing agent inlet pipe (5) being mounted on the side wall of the upper half section (2);
a first electric shut-off valve (6), the first electric shut-off valve (6) being mounted on the reducing agent inlet pipe (5);
and the reducing agent inlet pipe (5) is fixedly communicated with the spraying head (7).
3. An adaptable flue gas treatment denitration device according to claim 2, wherein the heating lance (400) comprises:
a gun body (11), wherein the gun body (11) is arranged on the side wall of the first fixed pipe (8);
an igniter (12), wherein the igniter (12) is arranged on the outer wall of the gun body (11);
a fuel pipe (13), the fuel pipe (13) being in fixed communication with the gun body (11);
and a second electric shut-off valve (14), wherein the second electric shut-off valve (14) is mounted on the side wall of the fuel pipe (13).
4. A flue gas treatment denitration device that is adaptable according to claim 3, characterized in that the combustion-supporting assembly (500) comprises:
the air pump (15) is arranged on the outer wall of the first fixed pipe (8);
the air pre-storing pipe (16), the air pre-storing pipe (16) is arranged on the outer wall of the first fixed pipe (8), and the air outlet end of the air pump (15) is fixedly communicated with the air pre-storing pipe (16);
the air pre-storing pipe (16) is communicated with the gun body (11) through the air inlet pipe (17);
and a third electric shut-off valve (18), wherein the third electric shut-off valve (18) is mounted on the side wall of the air inlet pipe (17).
5. An adaptable flue gas treatment denitration device according to claim 4, further comprising a flue gas preheating assembly (600), the flue gas preheating assembly (600) comprising:
the lower end of the second fixed pipe (19) is fixedly communicated with the lower half area (3), and the top end of the second fixed pipe (19) is fixedly communicated with the first fixed pipe (8);
the resistance heating piece (20) is provided with a plurality of air inlets, and the resistance heating piece (20) is arranged on the inner side wall of the second fixed pipe (19);
and a connecting pipe (21), wherein the connecting pipe (21) penetrates through the resistance heating sheet (20), and both sides of the connecting pipe (21) are provided with electric wires.
6. An adaptable flue gas treatment denitration device according to claim 5, further comprising a cooling assembly (700), the cooling assembly (700) comprising:
the cooling cylinder (22), the cooling cylinder (22) is of a double-layer structure, and the cooling cylinder (22) is fixedly communicated with the discharge pipe (4);
the liquid injection pipe (23), the liquid injection pipe (23) is fixedly communicated with the outer wall of the cooling cylinder (22), and a fourth electric stop valve (24) is arranged on the liquid injection pipe (23);
the liquid discharge pipe (25), the liquid discharge pipe (25) with the outer wall fixed intercommunication of cooling cylinder (22), be provided with fifth electronic stop valve (26) on liquid discharge pipe (25).
7. An adaptable flue gas treatment denitration device according to claim 6, further comprising an evacuation assembly (800), the evacuation assembly (800) comprising:
-a discharge manifold (27), said discharge manifold (27) being in fixed communication with said cooling cartridge (22);
the pre-storing box (28), the bottom end of the discharging main pipe (27) is fixedly communicated with the pre-storing box (28), and a guide plate (29) is fixedly arranged in the pre-storing box (28);
the first discharge branch pipe (30), the first discharge branch pipe (30) is fixedly communicated with the bottom end of the pre-storage box (28), and a sixth electric stop valve (31) is arranged on the first discharge branch pipe (30);
and a second discharge branch pipe (32), wherein the second discharge branch pipe (32) is communicated with the discharge main pipe (27), and an exhaust fan (33) is arranged on the inner side wall of the second discharge branch pipe (32).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647930.1A CN117339368A (en) | 2023-12-05 | 2023-12-05 | Denitration device for flue gas treatment of adaptable regulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647930.1A CN117339368A (en) | 2023-12-05 | 2023-12-05 | Denitration device for flue gas treatment of adaptable regulation |
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| CN212299896U (en) * | 2020-06-10 | 2021-01-05 | 山东联合王晁水泥有限公司 | Cement kiln control device |
| CN218688040U (en) * | 2022-11-04 | 2023-03-24 | 贵州沿河西南水泥有限公司 | High-efficient HSNCR denitration device of cement kiln |
| CN219502223U (en) * | 2022-03-30 | 2023-08-11 | 五台云海镁业有限公司 | Kiln flue gas denitration equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1396839A (en) * | 1972-06-10 | 1975-06-04 | Aoi K | Process and apparatus for removing nitrogen oxides from waste gas |
| CN101785959A (en) * | 2010-01-22 | 2010-07-28 | 中国计量学院 | Selective non-catalytic NOx control method for auxiliary re-burning temperature control |
| CN208229658U (en) * | 2018-03-29 | 2018-12-14 | 武汉阳阳蓝天环保有限公司 | A kind of SNCR modularization denitrating system |
| CN212299896U (en) * | 2020-06-10 | 2021-01-05 | 山东联合王晁水泥有限公司 | Cement kiln control device |
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