CN108636111B - Selective catalytic reduction denitration device - Google Patents
Selective catalytic reduction denitration device Download PDFInfo
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- CN108636111B CN108636111B CN201810603942.7A CN201810603942A CN108636111B CN 108636111 B CN108636111 B CN 108636111B CN 201810603942 A CN201810603942 A CN 201810603942A CN 108636111 B CN108636111 B CN 108636111B
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- 238000010531 catalytic reduction reaction Methods 0.000 title claims abstract description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000002347 injection Methods 0.000 claims abstract description 43
- 239000007924 injection Substances 0.000 claims abstract description 43
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000005507 spraying Methods 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 abstract description 7
- 239000007921 spray Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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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
- B01D53/90—Injecting reactants
-
- 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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of flue gas denitration, and particularly relates to a selective catalytic reduction denitration device which comprises a flue gas injection pipe, an ammonia gas injection pipe, a mixing tank, an ammonia spraying device and a reactor; an ammonia gas injection pipe is arranged at the bottom of the mixing tank, a flue gas injection pipe is arranged at one side of the ammonia gas injection pipe, one side of the top of the mixing tank is connected with a reactor through a pipeline, and a catalyst is arranged in the reactor; the ammonia spraying device is arranged in the mixing tank; the ammonia spraying device comprises a fixed pipe, a transmission shaft, a transmission gear, a connecting rod, a slip ring and an elastic spiral pipe; when the ammonia gas is sprayed out by the elastic spiral tube of the ammonia spraying device, the connecting rod can be controlled by the motor to swing, the connecting rod is changed to be vertical to the fixing tube from the tangential direction of the original fixing tube, the elastic spiral tube is outwards supported by the connecting rod, the ammonia spraying range of the elastic spiral tube is changed, and the ammonia gas sprayed out by the elastic spiral tube and the flue gas are fully mixed and then enter the reactor for reduction reaction.
Description
Technical Field
The invention belongs to the technical field of flue gas denitration, and particularly relates to a selective catalytic reduction denitration device.
Background
NOx is a pollutant which has great influence on air pollution, can form photochemical smog and acid rain, destroys an ozone layer and even causes serious greenhouse effect, and has great harm to human bodies, environment and ecological systems. Therefore, the treatment of NOx and the improvement of the denitration technology have important significance for protecting the ecological environment and the sustainable development of China.
At present, the Selective Catalytic Reduction (SCR) and the selective non-catalytic reduction (SNCR) are mainly used for the conventional denitration. Among them, the SCR technology widely used is an effective method for treating NOx emission, and its reducing agents include urea, ammonia water and pure ammonia, usually NH3 is used as a reducing agent to reduce NOx into harmless N2 under the action of a catalyst, thereby removing NOx in flue gas.
Some technical schemes for flue gas denitration also appear in the prior art, for example, a Chinese patent with application number of 2015107683386 discloses a double-cyclone SCR denitration method and a device thereof, wherein a first cyclone catalytic reaction chamber and a second cyclone catalytic reaction chamber are arranged along the denitration tower body; the flue gas inlet pipeline is arranged on the upper side wall of the tower body; a plurality of swirl atomizing nozzles are respectively arranged along the inner circumferential surface of the flue gas inlet pipeline and the inner circumferential surface of the top of the first swirl catalytic reaction cavity; when the flue gas enters the flue gas inlet pipeline, the flue gas and the ammonia gas sprayed by the rotational flow atomizing nozzle are mutually entrained and mixed, spirally sink in a circle cutting mode from top to bottom along the circumference of the first rotational flow catalytic reaction cavity, and spirally rise in a circle cutting mode from bottom to top along the circumference of the second rotational flow catalytic reaction cavity under the action of the cyclone.
This technical scheme can make ammonia and flue gas intensive mixing, but this scheme passes through whirl atomizing nozzle and sprays the ammonia, and this ammonia concentration that just makes the top is higher, causes the mixture of ammonia and flue gas insufficient, and simultaneously, whirl spun ammonia scope is wayward, influences the mixture of ammonia and flue gas, has restricted follow-up reduction reaction efficiency.
Disclosure of Invention
In order to make up for the defects of the prior art, the selective catalytic reduction denitration device provided by the invention has the advantages that when ammonia is sprayed out of the elastic spiral tube of the ammonia spraying device, the connecting rod can be controlled to swing through the motor, the connecting rod is perpendicular to the fixed tube from the tangential direction of the original fixed tube, the elastic spiral tube is outwards supported through the connecting rod, the ammonia spraying range of the elastic spiral tube is changed, and the ammonia sprayed out of the elastic spiral tube and flue gas are fully mixed and then enter the reactor for reduction reaction.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a selective catalytic reduction denitration device, which comprises a flue gas injection pipe, an ammonia gas injection pipe, a mixing tank, an ammonia spraying device and a reactor, wherein the flue gas injection pipe is connected with the ammonia gas injection pipe; an ammonia gas injection pipe is arranged at the bottom of the mixing tank, a flue gas injection pipe is arranged at one side of the ammonia gas injection pipe, one side of the top of the mixing tank is connected with a reactor through a pipeline, and a catalyst is arranged in the reactor; the ammonia spraying device is arranged in the mixing tank; the ammonia spraying device comprises a fixed pipe, a transmission shaft, a transmission gear, a connecting rod, a slip ring and an elastic spiral pipe; a fixed pipe for connecting a top plate and a bottom plate of the mixing tank is arranged in the mixing tank; a transmission shaft is rotatably arranged in the fixed pipe; the transmission shaft is controlled to rotate by a motor, the outer ring of the transmission shaft is fixedly connected with a group of transmission gears, a connecting rod is rotatably mounted in the pipe wall of the fixed pipe and is controlled to rotate by the transmission gears, a connecting rod end ball is connected with a sliding ring, and the sliding ring is sleeved on the outer ring of the elastic spiral pipe; the elasticity spiral pipe is around fixed pipe setting, and elasticity spiral pipe one end slidable mounting is in blending tank roof bottom, and the ammonia filling pipe of blending tank bottom is being connected to the elasticity spiral pipe other end, sets up a set of jet orifice on the elasticity spiral pipe. When the ammonia spraying device works, the flue gas injection pipe injects flue gas into the mixing tank, and the ammonia gas injection pipe sprays ammonia gas through the elastic spiral pipe of the ammonia spraying device; when elasticity spiral pipe blowout ammonia, can be through the swing of motor control connecting rod, the connecting rod becomes the fixed pipe of perpendicular to by the tangential direction of original fixed pipe, outwards props the elasticity spiral pipe through the connecting rod, changes the ammonia scope of spouting of elasticity spiral pipe, and elasticity spiral pipe spun ammonia and flue gas intensive mixing back get into the reactor and carry out reduction reaction.
Preferably, the side of the slip ring is hinged with a swinging rod; the end of the swinging rod is provided with an elastic block which extrudes the elastic spiral tube. During operation, as the plane projection of the elastic spiral tube is a circular ring, when the connecting rod swings, one side of the sliding ring can scrape and rub the elastic spiral tube to damage the elastic spiral tube, the swinging rod is hinged to one side of the sliding ring, when the connecting rod gradually changes from the tangential direction of the fixed tube to the direction perpendicular to the fixed tube, the elastic spiral tube on one side of the sliding ring is extruded by the elastic block of the swinging rod to be inwards sunken, the elastic spiral tube is deformed in advance, and abrasion of the sliding ring to the elastic spiral tube is reduced.
Preferably, one end of the swinging rod is hinged on the sliding block; the sliding block is arranged on the connecting rod in a sliding manner; the connecting rod is divided into a first supporting rod and a second supporting rod, and the first supporting rod and the second supporting rod are connected through a group of telescopic rods; the sliding block is arranged on the second supporting rod in a sliding mode; an inserting block is arranged on one side of the sliding block; the insert block is used for being inserted into the end groove of the first support rod; the other end of the first supporting rod is connected with the sliding ring through a ball; the other end of the second supporting rod is rotatably arranged in the pipe wall of the fixed pipe. During operation, when the connecting rod gradually becomes the tangential direction of the fixed pipe from the vertical direction of the fixed pipe, the connecting rod extrudes the oscillating rod, the oscillating rod pushes the sliding block to slide along the second supporting rod, the inserting block is separated from the end groove of the first supporting rod, the first supporting rod and the second supporting rod are separated, and the phenomenon that the sliding ring generates large lateral pressure on the elastic spiral pipe when the connecting rod is in the tangential direction of the fixed pipe is avoided.
Preferably, one end of the oscillating rod is in contact with the connecting rod, a convex block is arranged on one side of the connecting rod, an arc-shaped groove is formed in one side of the convex block, the end of the oscillating rod can slide on the arc-shaped groove, an inclined hole penetrating through the connecting rod is formed in the connecting rod on one side of the arc-shaped groove, and the end of the oscillating rod can slide into the inclined hole through the arc-shaped groove. During operation, when the connecting rod is gradually changed into the tangential direction of the fixed pipe from the vertical direction of the fixed pipe, the elastic spiral pipe extrudes the elastic block at the end of the swinging plate, the swinging plate is rotated, and the rotating swinging plate falls into the inclined hole from the arc-shaped groove, so that the elastic spiral pipe vibrates, and the elastic spiral pipe is prevented from being stained with more dust due to long-time use.
Preferably, the outer side of the jet hole is provided with an elastic sheet arranged on the outer ring of the elastic spiral pipe, and the elastic sheet protrudes out of the elastic spiral pipe; the middle of the elastic sheet is provided with a cylindrical block which can be inserted into the injection hole. During operation, the elastic spiral pipe is easy to be blocked by dust due to long-time use, the elastic sheet is extruded by the sliding ring, the cylindrical block of the elastic sheet is pressed into the injection hole, the injection hole is dredged in real time, and the blockage of the injection hole is avoided.
The invention has the following beneficial effects:
1. according to the invention, the ammonia spraying device is arranged, when the elastic spiral tube of the ammonia spraying device sprays ammonia, the connecting rod can be controlled to swing through the motor, the connecting rod is changed to be vertical to the fixed tube from the tangential direction of the original fixed tube, the elastic spiral tube is outwards supported through the connecting rod, the ammonia spraying range of the elastic spiral tube is changed, and the ammonia sprayed by the elastic spiral tube and flue gas are fully mixed and then enter the reactor for reduction reaction.
2. According to the invention, the swing rod is hinged on one side of the slip ring, when the connecting rod is gradually changed from the tangential direction of the fixed pipe to be vertical to the fixed pipe, the elastic block of the swing rod extrudes the elastic spiral pipe on one side of the slip ring to be inwards sunken, the elastic spiral pipe is deformed in advance, and the abrasion of the slip ring to the elastic spiral pipe is reduced.
3. According to the invention, the inclined hole is formed in the connecting rod, when the connecting rod is gradually changed from the vertical direction of the fixed pipe to the tangential direction of the fixed pipe, the elastic spiral pipe extrudes the elastic block at the end of the swinging plate and rotates the swinging plate, and the rotating swinging plate falls into the inclined hole from the arc-shaped groove, so that the elastic spiral pipe vibrates, and the elastic spiral pipe is prevented from being stained with more dust due to long-time use.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of a connection of the connecting rod and slip ring of the present invention;
FIG. 4 is a schematic view of an alternative connection of the connecting rod of the present invention to a slip ring;
in the figure: the device comprises a flue gas injection pipe 1, an ammonia gas injection pipe 2, a mixing tank 3, an ammonia spraying device 4, a fixed pipe 41, a transmission shaft 42, a transmission gear 43, a connecting rod 44, a slip ring 45, an elastic spiral pipe 46, a spray hole 47, a reactor 5, a swinging rod 6, an elastic block 61, a sliding block 62, a first support rod 7, an expansion rod 71, an insertion block 72, a second support rod 8, a bump 9, an arc-shaped groove 91, an inclined hole 92, an elastic sheet 93 and a cylindrical block 94.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the selective catalytic reduction denitration device of the present invention includes a flue gas injection pipe 1, an ammonia gas injection pipe 2, a mixing tank 3, an ammonia injection device 4, and a reactor 5; an ammonia gas injection pipe 2 is arranged at the bottom of the mixing tank 3, a flue gas injection pipe 1 is arranged at one side of the ammonia gas injection pipe 2, one side of the top of the mixing tank 3 is connected with a reactor 5 through a pipeline, and a catalyst is arranged in the reactor 5; the ammonia spraying device 4 is arranged in the mixing tank 3; the ammonia spraying device 4 comprises a fixed pipe 41, a transmission shaft 42, a transmission gear 43, a connecting rod 44, a slip ring 45 and an elastic spiral pipe 46; a fixed pipe 41 for connecting the top plate and the bottom plate of the mixing tank 3 is arranged in the mixing tank 3; a transmission shaft 42 is rotatably mounted in the fixed pipe 41; the transmission shaft 42 is controlled to rotate by a motor, the outer ring of the transmission shaft 42 is fixedly connected with a group of transmission gears 43, a connecting rod 44 is rotatably mounted in the pipe wall of the fixed pipe 41, the connecting rod 44 is controlled to rotate by the transmission gears 43, the end ball of the connecting rod 44 is connected with a sliding ring 45, and the sliding ring 45 is sleeved on the outer ring of an elastic spiral pipe 46; the elastic spiral tube 46 is arranged around the fixed tube 41, one end of the elastic spiral tube 46 is slidably mounted at the bottom of the top plate of the mixing tank 3, the other end of the elastic spiral tube 46 is connected with the ammonia gas injection tube 2 at the bottom of the mixing tank 3, and a group of injection holes 47 are formed in the elastic spiral tube 46. When the device works, the flue gas injection pipe 1 injects flue gas into the mixing tank 3, and the ammonia gas injection pipe 2 sprays ammonia gas through the elastic spiral pipe 46 of the ammonia spraying device 4; when the elastic spiral tube 46 sprays the ammonia gas, the connecting rod 44 can be controlled to swing through the motor, the connecting rod 44 is changed into the vertical fixed tube 41 from the tangential direction of the original fixed tube 41, the elastic spiral tube 46 is outwards supported through the connecting rod 44, the ammonia spraying range of the elastic spiral tube 46 is changed, and the ammonia gas sprayed by the elastic spiral tube 46 and the flue gas are fully mixed and then enter the reactor 5 for reduction reaction.
As an embodiment of the present invention, the slide ring 45 is hinged to the swing rod 6; the end of the swing rod 6 is provided with an elastic block 61, and the elastic block 61 presses the elastic spiral pipe 46. During operation, as the plane projection of the elastic spiral tube 46 is a circular ring, when the connecting rod 44 swings, one side of the sliding ring 45 scratches the elastic spiral tube 46 to cause damage to the elastic spiral tube 46, and the swinging rod 6 is hinged to one side of the sliding ring 45, when the connecting rod 44 gradually changes from the tangential direction of the fixed tube 41 to be perpendicular to the fixed tube 41, the elastic block 61 of the swinging rod 6 extrudes the elastic spiral tube 46 at one side of the sliding ring 45 to be inwards recessed, so as to pre-deform the elastic spiral tube 46, and reduce abrasion of the sliding ring 45 to the elastic spiral tube 46.
As an embodiment of the present invention, one end of the swing lever 6 is hinged on the sliding block 62; the slide block 62 is slidably mounted on the connecting rod 44; the connecting rod 44 is divided into a first supporting rod 7 and a second supporting rod 8, and the first supporting rod 7 and the second supporting rod 8 are connected through a group of telescopic rods 71; the sliding block 62 is slidably mounted on the second support rod 8; an inserting block 72 is arranged on one side of the sliding block 62; the insert block 72 is used for being inserted into the end groove of the first supporting rod 7; the other end of the first supporting rod 7 is connected with a sliding ring 45; the other end of the second strut 8 is rotatably mounted in the wall of the fixed tube 41. When the connecting rod 44 is in operation, the connecting rod 44 gradually changes from the vertical direction of the fixed pipe 41 to the tangential direction of the fixed pipe 41, the connecting rod 44 extrudes the swing rod 6, the swing rod 6 pushes the sliding block 62 to slide along the second supporting rod 8, the inserting block 72 is separated from the end groove of the first supporting rod 7, the first supporting rod 7 is separated from the second supporting rod 8, and the phenomenon that the sliding ring 45 generates a larger lateral pressure on the elastic spiral pipe 46 when the connecting rod 44 is in the tangential direction of the fixed pipe 41 is avoided.
In one embodiment of the present invention, one end of the swing lever 6 contacts the link 44, a protrusion 9 is disposed on one side of the link 44, an arc-shaped groove 91 is disposed on one side of the protrusion 9, an end of the swing lever 6 can slide on the arc-shaped groove 91, an inclined hole 92 penetrating through the link 44 is disposed on the link 44 on one side of the arc-shaped groove 91, and the end of the swing lever 6 can slide into the inclined hole 92 from the arc-shaped groove 91. When the swinging plate works, when the connecting rod 44 is gradually changed from the vertical direction of the fixed pipe 41 to the tangential direction of the fixed pipe 41, the elastic spiral pipe 46 extrudes the elastic block 61 at the end of the swinging plate 6, and the swinging plate 6 rotates, and the rotating swinging plate 6 falls into the inclined hole 92 through the arc-shaped groove 91, so that the elastic spiral pipe 46 vibrates, and the elastic spiral pipe 46 is prevented from being stained with more dust due to long-time use.
As an embodiment of the present invention, an elastic piece 93 mounted on an outer ring of the elastic spiral tube 46 is disposed outside the injection hole 47, and the elastic piece 93 protrudes out of the elastic spiral tube 46; the middle of the elastic sheet 93 is provided with a cylindrical block 94, and the cylindrical block 94 can be inserted into the injection hole 47. During operation, the elastic spiral tube 46 is easy to be blocked by dust due to long-time use, the elastic sheet 93 is extruded by the sliding ring 45, the cylindrical block 94 of the elastic sheet 93 is pressed into the injection hole 47, the injection hole 47 is dredged in real time, and the blockage of the injection hole 47 is avoided.
When the device works, the flue gas injection pipe 1 injects flue gas into the mixing tank 3, and the ammonia gas injection pipe 2 sprays ammonia gas through the elastic spiral pipe 46 of the ammonia spraying device 4; when the elastic spiral tube 46 sprays the ammonia gas, the connecting rod 44 can be controlled by the motor to swing, the connecting rod 44 is perpendicular to the fixed tube 41 from the tangential direction of the original fixed tube 41, the elastic spiral tube 46 is outwards supported by the connecting rod 44, the ammonia spraying range of the elastic spiral tube 46 is changed, and the ammonia gas sprayed by the elastic spiral tube 46 and the flue gas are fully mixed and then enter the reactor 5 for reduction reaction; when the connecting rod 44 swings, one side of the sliding ring 45 scratches the elastic spiral tube 46 to cause damage to the elastic spiral tube 46, and the swinging rod 6 is hinged to one side of the sliding ring 45, so that when the connecting rod 44 is gradually changed from the tangential direction of the fixed tube 41 to be perpendicular to the fixed tube 41, the elastic block 61 of the swinging rod 6 extrudes the elastic spiral tube 46 at one side of the sliding ring 45 to be inwards sunken, the elastic spiral tube 46 is deformed in advance, and abrasion of the sliding ring 45 to the elastic spiral tube 46 is reduced; meanwhile, when the connecting rod 44 gradually changes from the vertical direction of the fixed pipe 41 to the tangential direction of the fixed pipe 41, the connecting rod 44 extrudes the swing rod 6, the swing rod 6 pushes the sliding block 62 to slide along the second supporting rod 8, and the inserting block 72 is separated from the end groove of the first supporting rod 7, so that the first supporting rod 7 is separated from the second supporting rod 8, and the phenomenon that the sliding ring 45 generates a larger side pressure on the elastic spiral pipe 46 when the connecting rod 44 is in the tangential direction of the fixed pipe 41 is avoided; when the connecting rod 44 gradually changes from the vertical direction of the fixed pipe 41 to the tangential direction of the fixed pipe 41, the elastic spiral pipe 46 extrudes the elastic block 61 at the end of the swinging plate 6, and the swinging plate 6 rotates, and the rotating swinging plate 6 falls into the inclined hole 92 through the arc-shaped groove 91, so that the elastic spiral pipe 46 vibrates, and the elastic spiral pipe 46 is prevented from being stained with more dust due to long-time use.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A selective catalytic reduction denitration device comprises a flue gas injection pipe (1), an ammonia gas injection pipe (2), a mixing tank (3), an ammonia spraying device (4) and a reactor (5); an ammonia gas injection pipe (2) is arranged at the bottom of the mixing tank (3), a flue gas injection pipe (1) is arranged at one side of the ammonia gas injection pipe (2), one side of the top of the mixing tank (3) is connected with a reactor (5) through a pipeline, and a catalyst is arranged in the reactor (5); the ammonia spraying device (4) is arranged in the mixing tank (3); the method is characterized in that: the ammonia spraying device (4) comprises a fixed pipe (41), a transmission shaft (42), a transmission gear (43), a connecting rod (44), a slip ring (45) and an elastic spiral pipe (46); a fixed pipe (41) for connecting the top plate and the bottom plate of the mixing tank (3) is arranged in the mixing tank (3); a transmission shaft (42) is rotatably arranged in the fixed pipe (41); the transmission shaft (42) is controlled to rotate by a motor, the outer ring of the transmission shaft (42) is fixedly connected with a group of transmission gears (43), a connecting rod (44) is rotatably mounted in the pipe wall of the fixed pipe (41), the connecting rod (44) is controlled to rotate by the transmission gears (43), the end ball of the connecting rod (44) is connected with a sliding ring (45), and the sliding ring (45) is sleeved on the outer ring of the elastic spiral pipe (46); elasticity spiral pipe (46) are around fixed pipe (41) setting, and elasticity spiral pipe (46) one end slidable mounting is in blending tank (3) roof bottom, and the ammonia filling tube (2) of blending tank (3) bottom are being connected to elasticity spiral pipe (46) other end, set up a set of jet orifice (47) on elasticity spiral pipe (46).
2. The scr denitration device according to claim 1, wherein: one side of the sliding ring (45) is hinged with a swinging rod (6); the end of the swinging rod (6) is provided with an elastic block (61), and the elastic spiral tube (46) is extruded by the elastic block (61).
3. The scr denitration device according to claim 2, wherein: one end of the swinging rod (6) is hinged on the sliding block (62); the sliding block (62) is arranged on the connecting rod (44) in a sliding mode; the connecting rod (44) is divided into a first supporting rod (7) and a second supporting rod (8), and the first supporting rod (7) and the second supporting rod (8) are connected through a group of telescopic rods (71); the sliding block (62) is arranged on the second supporting rod (8) in a sliding mode; an inserting block (72) is arranged on one side of the sliding block (62); the insert block (72) is used for being inserted into the end groove of the first support rod (7); the other end of the first supporting rod (7) is connected with a sliding ring (45) through a ball; the other end of the second supporting rod (8) is rotatably arranged in the pipe wall of the fixed pipe (41).
4. The scr denitration device according to claim 2, wherein: swing arm (6) one end is contacting connecting rod (44), connecting rod (44) one side is equipped with lug (9), lug (9) one side is equipped with arc wall (91), the end of swing arm (6) can slide on arc wall (91), set up inclined hole (92) that run through connecting rod (44) on connecting rod (44) of arc wall (91) one side, swing arm (6) end can be slided into in inclined hole (92) by arc wall (91).
5. The scr denitration device according to claim 1, wherein: an elastic sheet (93) arranged on the outer ring of the elastic spiral tube (46) is arranged on the outer side of the jet hole (47), and the elastic sheet (93) protrudes out of the elastic spiral tube (46); the middle of the elastic sheet (93) is provided with a cylindrical block (94), and the cylindrical block (94) can be inserted into the injection hole (47).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810603942.7A CN108636111B (en) | 2018-06-12 | 2018-06-12 | Selective catalytic reduction denitration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810603942.7A CN108636111B (en) | 2018-06-12 | 2018-06-12 | Selective catalytic reduction denitration device |
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| CN108636111A CN108636111A (en) | 2018-10-12 |
| CN108636111B true CN108636111B (en) | 2020-12-01 |
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| CN109395561A (en) * | 2018-11-18 | 2019-03-01 | 湖南冠颜料有限公司 | A kind of crystal seed tail gas treatment device and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3854701A (en) * | 1973-07-02 | 1974-12-17 | J Palma | Fluid mixer |
| CN203971688U (en) * | 2014-07-29 | 2014-12-03 | 江苏宝华环保科技有限公司 | Mixing arrangement |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3854701A (en) * | 1973-07-02 | 1974-12-17 | J Palma | Fluid mixer |
| CN203971688U (en) * | 2014-07-29 | 2014-12-03 | 江苏宝华环保科技有限公司 | Mixing arrangement |
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