CN116637503B - Flue gas denitration mixing arrangement - Google Patents
Flue gas denitration mixing arrangement Download PDFInfo
- Publication number
- CN116637503B CN116637503B CN202310902315.4A CN202310902315A CN116637503B CN 116637503 B CN116637503 B CN 116637503B CN 202310902315 A CN202310902315 A CN 202310902315A CN 116637503 B CN116637503 B CN 116637503B
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- CN
- China
- Prior art keywords
- wall
- guide plate
- flue gas
- denitration
- deflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000003546 flue gas Substances 0.000 title claims abstract description 93
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 42
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 23
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 23
- 238000001802 infusion Methods 0.000 claims description 12
- 230000006978 adaptation Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 40
- 239000000203 mixture Substances 0.000 abstract description 22
- 230000009471 action Effects 0.000 abstract description 13
- 230000001133 acceleration Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 abstract 1
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 239000000779 smoke Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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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
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/14—Mixing gases with gases with moving mixing elements, e.g. with liquid seal
-
- 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
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration mixing device, which comprises a denitration chamber, wherein an air inlet assembly is arranged on the outer wall of the denitration chamber, a conveying assembly is arranged on the inner wall of the bottom of the denitration chamber, and a guide assembly is arranged on the inner wall of the top of the denitration chamber; under the action of the first guide plate to the fourth guide plate, the flue gas mixture is subjected to the processes of twice deceleration and twice acceleration, the flue gas and the ammonia gas are in different moving speeds under the inertia action to be in more full contact during acceleration and deceleration, the ammonia gas sprayed out of the first nozzle on the annular pipe under the action of the pump body can be in full contact with the flue gas during each deceleration to generate reduction reaction, the contact reaction of the flue gas and the flue gas during the deceleration is more uniform, the flue gas and the ammonia gas can flow along opposite directions under the action of the first guide plate and the second guide plate during each acceleration and deceleration, the mixing effect of the flue gas and the ammonia gas is further improved, and the mixing efficiency of flue gas denitration is improved.
Description
Technical Field
The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration mixing device.
Background
The flue gas denitration mainly removes nitrogen oxides in the flue gas, and avoids pollution to the atmosphere, soil and water sources caused by too high concentration of nitrogen oxides discharged into the atmosphere. The principle of the flue gas denitration technology is that nitrogen oxides are reduced into nitrogen by a reducing agent under the action of a catalyst, the common catalyst is SCR, and the common reducing agent is ammonia.
Flue gas denitration techniques generally do not use a stirring structure because denitration reactions generally need to be performed in the presence of an appropriate temperature, a catalyst, and a reducing agent, without stirring. Stirring structure can increase system complexity, energy consumption and running cost, make the catalyst adsorb unstably simultaneously, lead to denitration efficiency reduction, mix urea aqueous solution or aqueous ammonia and flue gas, through the reaction on the catalyst with NOx conversion nitrogen gas and water, this kind of reaction needs take place on the catalyst surface, and need not promote the reaction through stirring, present flue gas denitration mixing arrangement uses ammonia spraying structure and drainage structure to increase the misce bene degree of ammonia and flue gas, the flue gas does not carry out premixed treatment with ammonia before getting into the denitration room, flue gas mixture constant flow rate after getting into the denitration room, the flow direction is unchangeable, flue gas and ammonia can not further mix evenly, flue gas hardly stabilizes denitration treatment fast, consequently, a flue gas denitration mixing arrangement of urgent need solves above-mentioned problem.
Disclosure of Invention
The invention aims to provide a flue gas denitration mixing device for solving the problems in the background technology.
The technical scheme of the invention is as follows: the flue gas denitration mixing device comprises a denitration chamber, wherein an air inlet assembly is arranged on the outer wall of the denitration chamber, a conveying assembly is arranged on the inner wall of the bottom of the denitration chamber, a guide assembly is arranged on the inner wall of the top of the denitration chamber, the air inlet assembly comprises an air inlet pipe, fixing plates are fixedly connected on the outer walls of the two sides of the top and the bottom of the air inlet pipe respectively, a plurality of fixing plates are fixedly connected with the outer wall of the denitration chamber, first spiral blades are fixedly connected on the inner walls of the two sides of the air inlet pipe respectively through screws, the conveying assembly comprises an ammonia water tank and a pump body, mounting frames are fixedly connected with four corners of the outer wall of the ammonia water tank respectively, the pump body is arranged on one side of the outer wall of the bottom of the denitration chamber, a liquid inlet pipe is inserted into the input end of the pump body and is connected with one side of the outer wall of the bottom of the ammonia water tank, the two side input ends of the pump body are respectively inserted with a first infusion tube, one end of each first infusion tube far away from the pump body is respectively sleeved with a spiral tube, the inner side of each spiral tube is respectively provided with a second nozzle, each second nozzle is respectively connected with an air inlet pipe, the guide assembly comprises a first guide plate, a second guide plate, a third guide plate and a fourth guide plate, the inner walls of the first guide plate and the third guide plate are respectively connected with a first drainage plate through screws, the inner walls of the second guide plate and the fourth guide plate are respectively connected with a second drainage plate through screws, four corners of the outer walls of the top of the first guide plate and the third guide plate are respectively fixedly connected with a fixed block, the fixed blocks are respectively fixedly connected with the inner walls of the denitration chamber, the second guide plate and the fourth guide plate are respectively fixedly connected with the outer wall of the air inlet pipe, the outer wall of the bottom of the third guide plate is fixedly connected with a drainage tube, the inner wall of the drainage tube is connected with a spiral She Er through screws, the output end at the top of the pump body is inserted with a second infusion tube, the outer walls of the other sides of the top and the bottom of the second infusion tube are inserted with annular tubes, and the inner walls of the annular tubes are provided with first nozzles.
Preferably, the annular pipes are fixedly connected with the inner wall of the denitration chamber, the first nozzles are distributed in an annular array, and the first nozzles are matched with the first guide plate and the third guide plate in position.
Preferably, the second nozzles are matched with the first spiral blade in size, and the output ends of the first nozzles and the second nozzles are arranged in an elliptical shape.
Preferably, the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are all in conical arrangement, the exhaust holes are formed in the outer walls of the bottom ends of the first guide plate and the third guide plate, the size of each exhaust hole is larger than that of the air inlet pipe, the collecting hole is formed in the outer wall of the top end of the ammonia water tank, and the collecting hole is matched with the size of the exhaust hole.
Preferably, the first drainage plate and the second drainage plate are distributed in an annular array, the first drainage plate and the second drainage plate are opposite in direction, the first drainage plate and the second drainage plate are arc-shaped, and the drainage tube is matched with the space between the second drainage plate and the third drainage plate.
Preferably, the denitration chamber bottom is the toper setting, the denitration chamber bottom is provided with the output tube, the opposite side outer wall of denitration chamber bottom is provided with the back flow, the back flow is connected with intake pipe opposite side outer wall, the equal clamp joint of outer wall of back flow and output tube has the solenoid valve.
Preferably, the nitrogen oxide detector is installed to the outer wall of back flow, the nitrogen oxide detector is connected with denitration room bottom opposite side outer wall, transfer line one and transfer line two all are the arc setting, transfer line one and transfer line two all with the size looks adaptation of denitration room.
Preferably, the guide plate IV is located right above the guide plate III, the guide plate III is located right above the guide plate II, the guide plate II is located right above the guide plate I, the nozzle II is arranged in an inclined mode, and the nozzle II is opposite to the flow direction of the flue gas.
Compared with the prior art, the flue gas denitration mixing device provided by the invention has the following improvements and advantages:
the method comprises the following steps: according to the invention, the denitration chamber, the air inlet assembly, the conveying assembly and the guide assembly are arranged, after the mixture of the flue gas and the ammonia gas enters the denitration chamber through the air inlet pipe and is sent to the top, the mixture of the flue gas and the ammonia gas is output through the guide plate IV in an outward diffusion way, the output aperture is increased, the flow speed is slowed down, and simultaneously the mixture of the flue gas and the ammonia gas is obliquely moved under the action of the guide plate III, the movement speed is accelerated again due to the fact that the aperture is reduced when the mixture of the flue gas and the ammonia gas moves downwards from the top to the bottom under the action of the guide plate III, the opposite direction of the mixture of the flue gas and the ammonia gas moves downwards from the bottom of the guide plate III, the operation of the flow of the flue gas and the ammonia gas is repeatedly decelerated and accelerated through the guide plate IV and the guide plate IV in turn, the flue gas to be processed is preprocessed before entering the denitration chamber, and is mixed with the ammonia gas in advance, the flue gas is rotationally lifted and lowered under the action of the spiral blade IV in the air inlet pipe, the uniform mixing pretreatment is carried out with the ammonia gas sprayed out on the top when the spiral pipe IV is carried out, the mixture is uniformly mixed with the ammonia gas from the top to the bottom after entering the denitration chamber, the flue gas is fully contacted with the flue gas through the spiral pipe under the action of the acceleration nozzle and the action of the acceleration of the two acceleration plates, and the flue gas is fully contacted with the flue gas after the flue gas is further reduced in the opposite directions when the two directions;
and two,: according to the invention, through the arrangement of the output pipe, the return pipe, the nitrogen oxide detector and the electromagnetic valve, after the flue gas is subjected to denitration treatment uniformly, the flue gas enters the return pipe at the bottom, the nitrogen oxide detector arranged on the return pipe detects the flowing flue gas and checks whether NOx remains, the flue gas without denitration completely returns to the denitration chamber to be subjected to denitration treatment again through the return pipe, the electromagnetic valve on the output pipe is opened after denitration is completed, the flue gas after denitration is output from the output pipe at the bottom, and the output flue gas is ensured to have no NOx residues.
Drawings
The invention is further explained below with reference to the drawings and examples:
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic view of an intake pipe connection structure of the present invention;
FIG. 3 is a schematic view of the structure of the intake and output assemblies of the present invention;
FIG. 4 is a schematic view of the guide assembly of the present invention;
FIG. 5 is an exploded schematic view of a three-connection structure of the deflector of the present invention;
fig. 6 is an enlarged schematic view of the a-zone structure of the present invention.
Reference numerals illustrate:
1. a denitration chamber; 2. an air intake assembly; 21. an air inlet pipe; 22. spiral leaf I; 23. a fixing plate; 3. a transport assembly; 31. a pump body; 32. a first infusion tube; 33. a second infusion tube; 34. an annular tube; 35. a first nozzle; 36. an ammonia water tank; 37. a mounting frame; 38. a spiral tube; 39. a second nozzle; 4. a guide assembly; 41. a first guide plate; 42. a second guide plate; 43. a guide plate III; 44. a guide plate IV; 45. a drainage plate I; 46. a drainage plate II; 47. a drainage tube; 48. a fixed block; 49. spiral She Er; 5. an output pipe; 6. a nitrogen oxide detector; 7. a return pipe; 8. a solenoid valve.
Detailed Description
The following detailed description of the present invention clearly and fully describes the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments 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.
The invention provides a flue gas denitration mixing device through improvement, and the technical scheme of the invention is as follows:
as shown in fig. 1-6, a flue gas denitration mixing device comprises a denitration chamber 1, an air inlet assembly 2 is arranged on the outer wall of the denitration chamber 1, a conveying assembly 3 is arranged on the inner wall of the bottom of the denitration chamber 1, a guide assembly 4 is arranged on the inner wall of the top of the denitration chamber 1, the air inlet assembly 2 comprises an air inlet pipe 21, fixing plates 23 are fixedly connected with the outer wall of the denitration chamber 1 on the outer walls of the two sides of the top and the bottom of the air inlet pipe 21, a plurality of fixing plates 23 are fixedly connected with the outer wall of the denitration chamber 1, screw-connected spiral blades 22 are respectively arranged on the inner walls of the two sides of the air inlet pipe 21, the conveying assembly 3 comprises an ammonia water tank 36 and a pump body 31, mounting frames 37 are fixedly connected with the inner wall of the bottom of the denitration chamber 1 at four corners of the outer wall of the ammonia water tank 36, an ammonia water inlet pipe is inserted into the input end of the pump body 31 and is connected with the outer wall of one side of the bottom of the ammonia water tank 36, the two side input ends of the pump body 31 are respectively inserted with a first infusion tube 32, one end of each first infusion tube 32 far away from the pump body 31 is respectively sleeved with a spiral tube 38, the inner side of each spiral tube 38 is respectively provided with a second nozzle 39, each second nozzle 39 is respectively connected with the air inlet pipe 21, the guide assembly 4 comprises a first guide plate 41, a second guide plate 42, a third guide plate 43 and a fourth guide plate 44, the inner walls of the first guide plate 41 and the third guide plate 43 are respectively connected with a first guide plate 45 through screws, the inner walls of the second guide plate 42 and the fourth guide plate 44 are respectively connected with a second guide plate 46 through screws, four corners of the outer walls of the tops of the first guide plate 41 and the third guide plate 43 are respectively fixedly connected with a fixed block 48, the bottom ends of the second guide plate 42 and the fourth guide plate 44 are respectively fixedly connected with the outer wall of the air inlet pipe 21, the air inlet pipe 21 penetrates through the ammonia water tank 36, the bottom outer wall of deflector III 43 concreties and has drainage tube 47, drainage tube 47 is located the intake pipe 21 outside, the inner wall of drainage tube 47 has spiral leaf two 49 through the screw connection, spiral leaf two 49 and intake pipe 21 outer wall fixed connection, the output at pump body 31 top has pegged graft and has transfer line two 33, the annular pipe 34 has all been pegged graft to the another side outer wall of transfer line two 33 tops and bottom, nozzle one 35 is all installed to the inner wall of annular pipe 34, specifically, install the denitration chamber 1 that is used for flue gas mixing denitration in the assigned position, intake assembly 2 carries the flue gas, spout ammonia through conveying assembly 3 after getting into denitration chamber 1, carry out drainage mixing denitration treatment to flue gas and ammonia through guiding assembly 4.
Further, the annular pipes 34 are fixedly connected with the inner wall of the denitration chamber 1, the first nozzles 35 are distributed in an annular array, and the first nozzles 35 are matched with the first guide plate 41 and the third guide plate 43 in position.
Further, the second nozzle 39 is matched with the first spiral blade 22 in size, the output ends of the first nozzle 35 and the second nozzle 39 are arranged in an oval shape, the position of the second nozzle 39 is just matched with the rotating shape of the first spiral blade 22, the sprayed ammonia water is located in the middle and cannot be blocked by the first spiral blade 22, the output ends of the first nozzle 35 and the second nozzle 39 are arranged in a transverse oval shape, the transverse spraying range of the ammonia water is increased, and the denitration treatment by contact with flue gas is convenient and uniform.
Further, the first guide plate 41, the second guide plate 42, the third guide plate 43 and the fourth guide plate 44 are all in conical arrangement, exhaust holes are formed in the outer walls of the bottom ends of the first guide plate 41 and the third guide plate 43, the size of each exhaust hole is larger than that of the air inlet pipe 21, a collecting hole is formed in the outer wall of the top end of the ammonia water tank 36, and the collecting hole is matched with the size of the exhaust hole, so that after flue gas enters, the flue gas can move among the first guide plate 41, the second guide plate 42, the third guide plate 43 and the fourth guide plate 44, and sprayed ammonia water can be returned to the ammonia water tank 36 through the collecting hole without being used up so as to be conveniently recycled.
Further, the first drainage plate 45 and the second drainage plate 46 are distributed in an annular array, the first drainage plate 45 and the second drainage plate 46 are opposite in direction, the first drainage plate 45 and the second drainage plate 46 are arc-shaped, the drainage tube 47 is matched with the space between the second guide plate 42 and the third guide plate 43, the flue gas and ammonia gas mixture is conveyed outwards in one direction through the first drainage plate 45 when moving, and then conveyed in the opposite direction through the second drainage plate 46, so that the mixed denitration effect is further improved.
Further, denitration room 1 bottom is the toper setting, denitration room 1 bottom is provided with output tube 5, the opposite side outer wall of denitration room 1 bottom is provided with back flow 7, back flow 7 is connected with intake pipe 21 opposite side outer wall, back flow 7 and the equal clamp joint of the outer wall of output tube 5 have solenoid valve 8, flue gas removes to the bottom after denitration treatment in denitration room 1, can directly get into back flow 7 at this moment and be detected, flue gas completely denitration will open the solenoid valve 8 output of output tube 5, have remaining will get back to intake pipe 21 through back flow 7 and be sent into denitration room 1 again and carry out denitration treatment, guarantee flue gas denitration thoroughly.
Further, the nitrogen oxide detector 6 is installed to the outer wall of back flow 7, and nitrogen oxide detector 6 is connected with the outer wall of denitration room 1 bottom opposite side, and transfer line one 32 and transfer line two 33 all are the arc setting, and transfer line one 32 and transfer line two 33 all with the size looks adaptation of denitration room 1, can be accurate continuous through nitrogen oxide detector 6 to detect whether the denitration is complete to the flue gas in the back flow 7.
Further, the fourth guide plate 44 is located right above the third guide plate 43, the third guide plate 43 is located right above the second guide plate 42, the second guide plate 42 is located right above the first guide plate 41, the second nozzles 39 are all obliquely arranged, the second nozzles 39 are opposite to the flow direction of the smoke, the first guide plate 41, the second guide plate 42, the third guide plate 43 and the fourth guide plate 44 are orderly arranged, the smoke flows stably and uniformly to mix and denitrate, the second nozzles 39 spray out ammonia gas to pretreat the smoke, and the ammonia gas and the smoke flow direction are opposite to each other to slow down the flow speed of the smoke and improve the mixing effect.
Working principle: when the flue gas denitration mixing device is needed to be used, flue gas enters the denitration chamber 1 through the snake-shaped air inlet pipe 21 in the air inlet assembly 2, when the flue gas flows through the inner walls of the two sides of the air inlet pipe 21, the flue gas can rotationally move under the action of the first spiral blade 22, the pump body 31 in the conveying assembly 3 is used for increasing the flow path of the flue gas, the inner wall ammonia water of the ammonia water tank 36 is pumped out, the flue gas is conveyed into the spiral pipes 38 on the two sides of the denitration chamber 1 through the first infusion pipe 32, the spiral pipes 38 are matched with the first spiral blade 22 in size, the second nozzle 39 is reversely matched with the flow of the flue gas, the second nozzle is obliquely arranged, the second nozzle 39 on one side of the denitration chamber 1 is obliquely inclined downwards, the second nozzle 39 on the other side of the denitration chamber 1 is obliquely upwards, so that the sprayed ammonia gas is opposite to the flow direction of the flue gas, the sprayed ammonia gas and the flowing flue gas can uniformly contact and be retarded to a certain extent, after the mixture of the flue gas and the ammonia gas enters the denitration chamber 1 through the air inlet pipe 21 and is sent to the top, the mixture is outwards diffused and output through the guide plate IV 44, the flow speed is slowed down by increasing the output aperture, simultaneously the mixture of the flue gas and the ammonia gas is downwards moved under the action of the guide plate IV 46, the movement speed is quickened again due to the reduction of the aperture when the mixture of the flue gas and the ammonia gas moves downwards from the guide plate III 43 under the action of the guide plate IV 45 on the guide plate III 43, the mixture of the flue gas and the ammonia gas moves downwards on the guide plate III 43 in the opposite direction from the bottom of the guide plate III 43, the operations of decelerating and accelerating and flowing in the opposite direction are repeatedly carried out through the guide plate IV 42 and the guide plate IV 41, the change of the movement speed and the flowing in the opposite direction furthest improve the mixing degree of the flue gas and the ammonia gas, the output end at the top of the pump body 31 is inserted with the infusion pipe II 33 in the conveying process, ammonia water is atomized and sprayed out evenly through a first nozzle 35 distributed in an annular array on an annular pipe 34 to be in contact with a flue gas mixture flowing at a slow flow speed to be matched with a catalyst for denitration treatment, a drainage tube 47 at the bottom of a third guide plate 43 is used for conducting the flue gas mixture output from the bottom of the third guide plate 43, so that the flue gas mixture accurately moves to the bottom of a second guide plate 42, is stably contacted with a second drainage plate 46 on the second guide plate 42 and is output along the shape of the second drainage plate 46, the flue gas mixture is ensured to move along a required direction, the flue gas mixture enters a return pipe 7 at the bottom after uniform flue gas denitration treatment, a nitrogen oxide detector 6 arranged on the return pipe 7 is used for detecting the flue gas flowing through the return pipe, whether NOx residues exist or not, the flue gas after complete denitration can return to the denitration chamber 1 again through the return pipe 7, an electromagnetic valve 8 on the output pipe 5 is opened after complete denitration, the flue gas is output from the bottom output pipe 5, an ammonia box 36 is fixedly arranged on the inner wall of the denitration chamber 1 through a mounting frame 37, the first guide plate 41 and the third guide plate 43 are fixedly connected with the inner wall of the denitration chamber 1 through a fixing block 48, the top and the inner wall of the denitration chamber 1, the top and the bottom of the flue gas mixture is sealed and the bottom 21 is completely sealed with the air inlet pipe 21, and the top is only can be completely sealed, and the gap is sealed and the bottom 21 is completely and the bottom is sealed and the bottom is arranged and the bottom 21 is only through the sealing the bottom plate 21 is sealed and the bottom 21 is completely.
Claims (5)
1. The utility model provides a flue gas denitration mixing device, includes denitration room (1), its characterized in that: the utility model provides a liquid injection device, including denitration chamber (1), the outer wall of denitration chamber (1) is provided with air intake assembly (2), the bottom inner wall of denitration chamber (1) is provided with conveying assembly (3), the top inner wall of denitration chamber (1) is provided with guide assembly (4), air intake assembly (2) are including intake pipe (21), both sides outer wall at intake pipe (21) top and bottom all concreties fixed plate (23), a plurality of fixed plate (23) all with denitration chamber (1) outer wall fixed connection, the both sides inner wall of intake pipe (21) all has spiral leaf one (22) through the screw connection, conveying assembly (3) are including ammonia water tank (36) and pump body (31), all concreting in outer wall four corners department of ammonia water tank (36) has mounting bracket (37), every mounting bracket (37) all with denitration chamber (1) bottom inner wall fixed connection, pump body (31) are installed in one side outer wall of denitration chamber (1) bottom, the input of pump body (31) is pegged graft and is gone into liquid pipe, liquid pipe and outer wall (36) bottom one side of outer wall (31) is connected with spiral pipe (31), one side of each spiral pipe (32) is all cup jointed, one end of each spiral pipe (32) is all is kept away from to one side of the infusion tube (32), each nozzle II (39) is connected with an air inlet pipe (21), the guide assembly (4) comprises a first guide plate (41), a second guide plate (42), a third guide plate (43) and a fourth guide plate (44), the inner walls of the first guide plate (41) and the third guide plate (43) are respectively connected with a first drainage plate (45) through screws, the inner walls of the second guide plate (42) and the fourth guide plate (44) are respectively connected with a second drainage plate (46) through screws, the four corners of the top outer walls of the first guide plate (41) and the third guide plate (43) are respectively fixedly connected with a fixed block (48), the fixed blocks (48) are respectively fixedly connected with the inner wall of a denitration chamber (1), the second guide plate (42) and the fourth guide plate (44) are respectively fixedly connected with the outer wall of the air inlet pipe (21), the outer wall of the bottom end of the third guide plate (43) is fixedly connected with a drainage tube (47), the inner wall of the drainage tube (47) is respectively connected with a screw She Er (49) through screws, the output end of the top of the pump body (31) is respectively provided with a second infusion tube (33), the other side of the pump body (33) is respectively connected with the outer wall of the annular tube (34), the annular tube (34) is respectively connected with the inner wall of the annular tube (34) and the annular tube (34) respectively, and the annular tube (34) is fixedly connected with the inner wall of the annular tube (34), the utility model provides a flue gas purification device, including nozzle one (35) and ammonia water case, nozzle one (35) all are annular array and distribute, a plurality of nozzle one (35) all with the position looks adaptation of deflector one (41) and deflector three (43), deflector one (41), deflector two (42), deflector three (43) and deflector four (44) all are the toper setting, exhaust hole has all been seted up to the bottom outer wall of deflector one (41) and deflector three (43), every the size of exhaust hole all is greater than the size of intake pipe (21), collecting hole has been seted up to the top outer wall of ammonia water case (36), collecting hole and the size looks adaptation of exhaust hole, deflector four (44) are located directly over the deflector three (43), deflector three (43) are located directly over the deflector two (42), deflector two (42) are located directly over the deflector one (41), every nozzle two (39) all are the slope setting, every the orientation of nozzle two (39) all opposite with the flue gas flow direction.
2. The flue gas denitration mixing device according to claim 1, wherein: the second nozzles (39) are matched with the first spiral blades (22) in size, and the output ends of the first nozzles (35) and the second nozzles (39) are arranged in an elliptical shape.
3. The flue gas denitration mixing device according to claim 1, wherein: the drainage plates I (45) and II (46) are distributed in an annular array, the directions of the drainage plates I (45) and II (46) are opposite, the drainage plates I (45) and II (46) are arc-shaped, and the drainage tube (47) is matched with the space between the guide plates II (42) and III (43).
4. The flue gas denitration mixing device according to claim 1, wherein: the utility model discloses a denitration device, including denitration chamber (1), outlet pipe (5), back flow (7) are provided with on the opposite side outer wall of denitration chamber (1) bottom, back flow (7) are connected with intake pipe (21) opposite side outer wall, equal clamp joint of outer wall of back flow (7) and outlet pipe (5) has solenoid valve (8).
5. The flue gas denitration mixing device as claimed in claim 4, wherein: the nitrogen oxide detector (6) is installed to the outer wall of back flow (7), nitrogen oxide detector (6) are connected with denitration room (1) bottom opposite side outer wall, transfer line one (32) and transfer line two (33) are the arc setting, transfer line one (32) and transfer line two (33) all with the size looks adaptation of denitration room (1).
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| CN202310902315.4A CN116637503B (en) | 2023-07-21 | 2023-07-21 | Flue gas denitration mixing arrangement |
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| CN202310902315.4A CN116637503B (en) | 2023-07-21 | 2023-07-21 | Flue gas denitration mixing arrangement |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003252A (en) * | 2007-05-08 | 2011-04-06 | 波森公司 | Device for distributing liquid substances in exhaust gas systems |
| CN102698579A (en) * | 2012-06-01 | 2012-10-03 | 北京国电龙源环保工程有限公司 | Ammonia injection and eddy current mixing device and method of flue gas denitrification system |
| CN105289301A (en) * | 2015-11-11 | 2016-02-03 | 华南理工大学 | Double-rotation SCR denitration method and apparatus thereof |
| CN109603519A (en) * | 2018-11-30 | 2019-04-12 | 宁波联创同宇环保科技有限公司 | A kind of SCR denitration system of boiler smoke |
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- 2023-07-21 CN CN202310902315.4A patent/CN116637503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003252A (en) * | 2007-05-08 | 2011-04-06 | 波森公司 | Device for distributing liquid substances in exhaust gas systems |
| CN102698579A (en) * | 2012-06-01 | 2012-10-03 | 北京国电龙源环保工程有限公司 | Ammonia injection and eddy current mixing device and method of flue gas denitrification system |
| CN105289301A (en) * | 2015-11-11 | 2016-02-03 | 华南理工大学 | Double-rotation SCR denitration method and apparatus thereof |
| CN109603519A (en) * | 2018-11-30 | 2019-04-12 | 宁波联创同宇环保科技有限公司 | A kind of SCR denitration system of boiler smoke |
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| CN116637503A (en) | 2023-08-25 |
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