CN116920595A - Industrial flue gas desulfurization, denitrification and dust removal integrated system - Google Patents
Industrial flue gas desulfurization, denitrification and dust removal integrated system Download PDFInfo
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- CN116920595A CN116920595A CN202311200060.3A CN202311200060A CN116920595A CN 116920595 A CN116920595 A CN 116920595A CN 202311200060 A CN202311200060 A CN 202311200060A CN 116920595 A CN116920595 A CN 116920595A
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- flue gas
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- main body
- reaction main
- desulfurization
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000003546 flue gas Substances 0.000 title claims abstract description 84
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 31
- 230000023556 desulfurization Effects 0.000 title claims abstract description 31
- 239000000428 dust Substances 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003054 catalyst Substances 0.000 claims abstract description 35
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000000779 smoke Substances 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 28
- 230000003009 desulfurizing effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000638 solvent extraction 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur 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
- B01D53/34—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
- B01D53/34—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
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses an integrated system for desulfurization, denitrification and dust removal of industrial flue gas, which belongs to the technical field of flue gas treatment, wherein a denitrification unit in the system comprises a denitrification reactor, and an air inlet plate with a plurality of air inlet holes is horizontally arranged in a reaction main body of the denitrification reactor; a partition plate is vertically arranged below the air inlet plate, catalyst layers are detachably arranged in chambers at two sides of the partition plate, and access doors corresponding to the catalyst layers are arranged on the side walls of the reaction main body; and flue gas mixing and plugging mechanisms are respectively arranged on two side walls of the reaction main body above the air inlet plate. When the catalyst layer does not need to be replaced, the flue gas mixing and plugging mechanism can promote the mixing of flue gas and ammonia, and when the catalyst layer needs to be replaced, the flue gas mixing and plugging mechanism acts to plug the air inlet plate above the corresponding side cavity, so that the flue gas is prevented from entering, the catalyst layer is replaced online, and the continuous operation of the system and the flue gas treatment efficiency are ensured.
Description
Technical Field
The invention relates to an integrated system for desulfurizing, denitrating and dedusting industrial flue gas, and belongs to the technical field of flue gas treatment.
Background
The integrated system for desulfurizing, denitrating and dedusting industrial flue gas integrates three processes of desulfurizing, denitrating and dedusting into one system, so that the integrated system can realize comprehensive treatment of industrial flue gas, thereby achieving the aim of reducing pollutant discharge.
The common denitration means in the industrial flue gas desulfurization, denitrification and dedusting integrated system is SCR flue gas denitration, and is usually to mix flue gas and ammonia gas, and nitrogen oxides in the flue gas generate nitrogen and water under the catalysis of a catalyst, so that the nitrogen oxides in the flue gas are reduced, and the pollution of the flue gas to the environment is reduced. However, the catalyst layers used in the existing denitration system are usually in the same chamber, and after the service life reaches the age limit or other problems, the catalyst layers need to be replaced by stopping the machine, so that online replacement cannot be realized, and the continuous operation and the flue gas treatment efficiency of the integrated system can be influenced.
Disclosure of Invention
The invention aims to provide an industrial flue gas desulfurization, denitrification and dedusting integrated system which can realize on-line replacement of a catalyst layer in a denitrification unit without stopping operation so as to ensure continuous operation of the system and flue gas treatment efficiency.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the integrated system for desulfurizing, denitrating and dedusting industrial flue gas comprises a denitration unit, a dedusting unit and a desulfurization unit, wherein the denitration unit, the dedusting unit and the desulfurization unit are sequentially communicated and arranged on a flue gas discharge path, and an air outlet end of the desulfurization unit is connected with a chimney;
the denitration unit comprises a denitration reactor, a gas replacement unit and an ammonia supply unit;
the denitration reactor comprises a reaction main body, wherein a smoke inlet channel and a smoke exhaust channel are respectively arranged at the top end and the bottom end of the reaction main body; the smoke inlet channel is connected with a smoke exhaust end pipeline of the boiler, and the smoke exhaust channel is connected with an air inlet end pipeline of the dust removal unit;
a plurality of ammonia gas inlet pipes are arranged on the smoke inlet channel in a surrounding way, and are connected with an ammonia supply unit and used for providing ammonia gas mixed with smoke gas into the denitration reactor;
an air inlet plate with a plurality of air inlet holes is horizontally arranged in the reaction main body; a partition board for dividing the interior of the reaction main body into a left cavity and a right cavity is vertically arranged below the air inlet board, a catalyst layer is detachably arranged in the cavities at two sides of the partition board, and an access door corresponding to the catalyst layer is arranged on the side wall of the reaction main body;
two side walls of the reaction main body above the air inlet plate are respectively provided with a flue gas mixing and blocking mechanism which can promote the mixing of flue gas and ammonia gas and can block the air inlet plate above the corresponding side chamber;
the gas replacement units are provided with two groups and are used for replacing the gas in the corresponding side chamber after the air inlet plate above the corresponding side chamber is blocked, and the gas is led into a pipeline between the boiler and the smoke inlet channel.
Preferably, the flue gas mixing and plugging mechanism comprises a fixed plate, wherein a fixed plate is arranged at the bottom end of one end face of the fixed plate, which is close to the inner wall side of the reaction main body, and a guide plate is arranged at the bottom end of the fixed plate, which is far away from the reaction main body;
the front side of the fixed disc is coaxially and rotationally provided with a rotary disc, and the rotary disc is respectively provided with a rotary arm I and a rotary arm II which incline upwards towards the inside of the reaction main body and incline downwards towards the inside of the reaction main body;
a driving mechanism for driving the first rotating arm and the second rotating arm to rotate by taking the center of a circle of the turntable as an axis is arranged on a fixed plate above the fixed disk;
a first fixed column is arranged at one side, close to the inner wall of the reaction main body, of the second end of the rotating arm, two connecting pieces are rotatably arranged on the first fixed column, the two connecting pieces are positioned at two sides of the second rotating arm, and an opening and closing plate extending towards the inner side of the reaction main body is arranged at the tail end of each connecting piece;
a guide slideway is arranged on the outer edge plate body of the guide plate, and a limit chute which is penetrated left and right is arranged on the second rotating arm; the sliding component which can simultaneously slide along the guide slideway and the limiting chute when the first rotating arm and the second rotating arm rotate along with the turntable is arranged on the rotating arm;
the sliding component is connected with the two connecting pieces through connecting arms, and two ends of each connecting arm are respectively connected with the sliding component and the connecting pieces in a rotating way;
the guide slideway can ensure that when the sliding component is positioned at the lowest end, the two connecting arms can prop the two opening and closing plates open so as to seal the corresponding side passing air plates; when the sliding component is located at the topmost end, the two connecting arms can pull the two opening and closing plates closer to promote mixing of flue gas and ammonia gas.
Preferably, the driving mechanism comprises a sliding rail vertically arranged on the fixed plate, a sliding block is arranged in the sliding rail in a sliding manner, and a telescopic device fixedly connected with the sliding block is arranged on the fixed plate above the sliding rail;
a connecting rod is arranged between the sliding block and one end of the rotating arm, and the connecting rod is respectively in relative rotation connection with the sliding block and the rotating arm;
the sliding block is driven to move up and down along the sliding rail through the action of the telescopic device, and then the rotating arm I is driven to rotate by taking the circle center of the turntable as the axis through the connecting rod.
Preferably, the bottom end plate bodies of the two opening plates are provided with a plurality of notches in a staggered way, and an extension plate is arranged on the plate body positioned between the two notches; after the two opening plates are unfolded, the extending plate on one opening plate is inserted into the notch on the other opening plate to seal the notch.
Preferably, the sliding assembly comprises a sliding block with a convex structure, and the sliding block is inserted from the bottom of the limiting chute; two limiting plates for preventing the sliding block from falling off from the second rotating arm are arranged at the top of the sliding block, and a guide rod inserted into the guide slideway is arranged on one of the limiting plates;
a second fixed column corresponding to the first fixed column is arranged at the bottom of the sliding block; through holes are formed in two ends of the connecting arm, and one end of the connecting arm is sleeved on the second fixing column; the top surface of the connecting piece is provided with a supporting lug, and the other end of the connecting arm is rotationally connected with the supporting lug on the corresponding connecting piece through a screw rod assembly.
Preferably, the flue gas mixing and plugging mechanism further comprises a lifting mechanism, the lifting mechanism is arranged on the side wall of the reaction main body, the fixed plate is fixedly connected with the lifting end of the lifting mechanism, and the lifting mechanism drives the fixed plate to move up and down.
Preferably, a guide block is further arranged on the side wall of the reaction main body below the lifting mechanism, a guide groove is formed in the guide block, and the side wall of the fixing plate is inserted into the guide groove.
Preferably, the gas replacement unit comprises two fans, wherein one fan is communicated with the reaction main body cavity through a gas inlet pipe, and is used for sucking air into the cavity above the catalyst layer after the gas inlet plate above the corresponding side cavity is blocked; the other fan is communicated with the reaction main body cavity through an air outlet pipe and is used for pumping out the air in the cavity and conveying the air into a pipeline between the boiler and the smoke inlet channel.
Preferably, a draught fan is also arranged on the pipeline between the dust removing unit and the desulfurization unit.
Preferably, a flue gas detector for detecting the nitrate content of flue gas is mounted on the reaction body below the catalyst layer.
The invention has the beneficial effects that:
1. the flue gas mixing and plugging mechanism is respectively arranged above each cavity of the reaction main body, and during normal operation, two connecting arms in each flue gas mixing and plugging mechanism can pull two opening and closing plates together to form a V-shaped structure which is inclined relatively, so that the flue gas and the ammonia gas can be promoted to be fully mixed above the air inlet plate; when the catalyst layer needs to be replaced, two connecting arms in each flue gas mixing and plugging mechanism can outwards prop up the two opening and closing plates until reaching a horizontal state when rotating, so that the air inlet plate on the corresponding side chamber is plugged, flue gas is prevented from entering the chamber, and then the replacement of the catalyst layer in the corresponding side chamber can be completed under the normal use state of the other side chamber without stopping operation, and the continuous operation and the flue gas treatment efficiency of the system are guaranteed.
2. By arranging the gas replacement unit, the gas in the cavity can be replaced by external air before the catalyst layer in the cavity is replaced, and the replaced gas is pumped back into a pipeline between the boiler and the smoke inlet channel for recycling, so that the safety of replacing the catalyst base layer can be improved; and through setting up the flue gas detector, realize detecting data, the security when further guaranteeing to change the catalytic layer.
3. The bottom end plate bodies of the two opening plates are provided with the plurality of notches in a staggered manner, and the plate bodies between the two notches are provided with the extension plates, so that excessive gas can be prevented from flowing towards one side when the two opening plates are in a V-shaped structure, and gas mixing can be promoted; simultaneously after two opening plates are propped open, the extension plate on one opening plate is inserted into the notch on the other opening plate, and the notch is plugged, namely, a planar plate body can be finally formed to plug the air inlet plate.
4. Through being provided with the draught fan, can promote the flow of flue gas in the system, improve treatment efficiency.
Drawings
FIG. 1 is a schematic diagram of a process principle of a desulfurization, denitrification and dedusting integrated system;
FIG. 2 is a side view of a denitration reactor;
FIG. 3 is a schematic view (front view) showing the internal structure of the denitration reactor when the catalyst layer is not required to be replaced;
fig. 4 is a schematic diagram (front view) of the internal structure of the denitration reactor when the catalyst layer in the left chamber needs to be replaced;
FIG. 5 is a front view of the flue gas mixing and plugging mechanism when the opening plate is in an inclined state;
FIG. 6 is a schematic view of the structure of the flue gas mixing and plugging mechanism when the opening plate is in an inclined state;
FIG. 7 is a front view of the flue gas mixing and plugging mechanism when the opening plate is in a horizontal state;
FIG. 8 is a schematic view of the structure of the flue gas mixing and plugging mechanism when the opening plate is in a horizontal state;
FIG. 9 is a plan view of the opening and closing plate in a horizontal state;
FIG. 10 is a schematic view of the slide assembly at the top of the guide track;
FIG. 11 is a schematic view of the structure of the rotating disc and the sliding assembly;
FIG. 12 is a side view of the mounting plate;
fig. 13 is a schematic view of a sliding assembly structure.
The main reference numerals in the figures have the following meanings:
1. the device comprises a denitration unit, 2, a dust removal unit, 3, a desulfurization unit, 4, an induced draft fan, 5, a denitration reactor, 6, an ammonia supply unit, 7, a reaction main body, 8, a smoke inlet channel, 9, a smoke exhaust channel, 10, an ammonia gas inlet pipe, 11, an air inlet plate, 12, an air inlet hole, 13, a partition plate, 14, a catalyst layer, 15, a smoke mixing and plugging mechanism, 16, a fixed plate, 17, a fixed disk, 18, a guide plate, 19, a turntable, 20, a first rotating arm, 21, a second rotating arm, 22, a sliding rail, 23, a sliding block, 24, a telescopic device, 25, a connecting rod, 26, a first fixed column, 27, a connecting piece, 28, an opening and closing plate, 29, a guide slideway, 30, a limit chute, 31, a sliding component, 32, a sliding block, 33, a limit plate, 34, a second fixed column, 35, a supporting lug, 36, a notch, 37, an extension plate, 38, a lifting mechanism, 39, a guide block, 40, a maintenance door, 41, an air inlet pipe, 42, an air outlet pipe, 43, a smoke detector, 44, a guide rod, 45 and a connecting arm.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
The embodiment is an integrated system for desulfurizing, denitrating and dedusting industrial flue gas, as shown in fig. 1, comprising a denitration unit 1, a dedusting unit 2 and a desulfurization unit 3, wherein the denitration unit 1, the dedusting unit 2 and the desulfurization unit 3 are sequentially communicated and arranged on a flue gas discharge path, flue gas produced by a boiler sequentially passes through the denitration unit 1, the dedusting unit 2 and the desulfurization unit 3 through pipelines, denitration, dedusting and desulfurization are sequentially completed, and then the flue gas is discharged to a chimney through an air outlet end of the desulfurization unit 3 and is discharged. The flue gas is mixed with ammonia in the denitration unit 1, and nitrogen oxide in the flue gas generates nitrogen and water under the catalysis of a catalyst, so that the nitrogen oxide in the flue gas is reduced, the pollution of the flue gas to the environment is reduced, and denitration is realized; the dust removing unit 2 can be purchased into a dust removing bag device or an electric dust remover, etc., and the desulfurizing unit 3 can also be purchased into the existing desulfurizing device from the market, and the details are repeated here. In order to promote the flow of the flue gas in the system and improve the treatment efficiency, a draught fan 4 is also arranged on a pipeline between the dust removing unit 2 and the desulfurization unit 3.
The catalyst layer 14 used in conventional denitration systems is usually located in the same chamber, and after the service life reaches the age or other problems and the catalyst fails, the catalyst layer 14 needs to be replaced by stopping the machine, which can affect the continuous operation of the integrated system and the flue gas treatment efficiency.
Therefore, the denitration unit 1 is technically improved in this embodiment. As shown in fig. 1 to 13, the denitration unit 1 comprises a denitration reactor 5 and an ammonia supply unit 6; the denitration reactor 5 comprises a reaction main body 7, and a smoke inlet channel 8 and a smoke outlet channel 9 are respectively arranged at the top end and the bottom end of the reaction main body 7; the top of the smoke inlet channel 8 is connected with a smoke exhaust end pipeline of the boiler, and the bottom of the smoke exhaust channel 9 is connected with an air inlet end pipeline of the dust removing unit 2.
The ammonia supply unit 6 adopts a conventionally used ammonia supply system, and comprises a liquid ammonia storage tank, an evaporator, a mixer, a blower and the like, wherein liquid ammonia generates steam under the action of the evaporator and enters the mixer, and the steam and air fed by the blower are mixed in the mixer and then fed into the denitration reactor 5; as shown in fig. 2, a plurality of ammonia gas inlet pipes 10 connected to the ammonia supply unit 6 are provided around the smoke inlet passage 8, and a mixture of ammonia gas and air is fed into the reaction main body 7 through the ammonia gas inlet pipes 10 to be mixed with the smoke.
As shown in fig. 3 and 4, an intake plate 11 having a plurality of intake holes 12 is horizontally provided in the reaction body 7; a partition plate 13 for partitioning the inside of the reaction body 7 into left and right chambers is vertically provided below the intake plate 11, and a catalyst layer 14 is detachably installed in each of the chambers on both sides of the partition plate 13. After the flue gas is mixed with ammonia gas and air, the flue gas can enter the two chambers through the air inlet holes 12 on the air inlet plate 11, and then nitrogen oxide in the flue gas can be enabled to generate nitrogen gas and water to realize denitration under the action of the strong indoor catalyst layer 14.
In order to realize the purpose of online replacement of the catalyst layer 14, two side walls of the reaction main body 7 above the air inlet plate 11 are respectively provided with a flue gas mixing and plugging mechanism 15 which can promote the mixing of flue gas and ammonia gas and can plug the air inlet plate 11 above the corresponding side chamber.
As shown in fig. 5-9 and 11-13, the flue gas mixing and plugging mechanism 15 comprises a fixed plate 16, a fixed plate 17 is arranged at the bottom end of one end surface of the fixed plate 16, which is close to the inner wall side of the reaction main body 7, and a guide plate 18 is arranged at the bottom end of the fixed plate 17, which is far away from the reaction main body 7; the front side of the fixed disc 17 is coaxially and rotatably provided with a rotary disc 19, and the rotary disc 19 is respectively provided with a rotary arm one 20 and a rotary arm two 21 which are inclined upwards towards the inside of the reaction main body 7 and inclined downwards towards the inside of the reaction main body 7; and a driving mechanism for driving the first rotating arm 20 and the second rotating arm 21 to rotate by taking the center of the circle of the turntable 19 as the axis is arranged on the fixed plate 16 positioned above the fixed plate 17.
The driving mechanism comprises a sliding rail 22 vertically arranged on the fixed plate 16, a sliding block 23 is arranged in the sliding rail 22 in a sliding way, and a telescopic device 24 fixedly connected with the sliding block 23 is arranged on the fixed plate 16 above the sliding rail 22; a connecting rod 25 is arranged between the sliding block 23 and the tail end of the first rotating arm 20, and the connecting rod 25 is respectively connected with the sliding block 23 and the first rotating arm 20 in a relative rotation manner; the slider 23 is driven to move up and down along the slide rail 22 by the action of the telescopic device 24, and then the first rotary arm 20 can be driven to rotate by the connecting rod 25 connected with the slider 23 by taking the center of the circle of the rotary disc 19 as the axis.
A first fixing column 26 is arranged at one side, close to the inner wall of the reaction main body 7, of the tail end of the second rotating arm 21, two connecting pieces 27 are rotatably arranged on the first fixing column 26, the two connecting pieces 27 are positioned at two sides of the second rotating arm 21, and an opening and closing plate 28 extending towards the inner side of the reaction main body 7 is arranged at the tail end of each connecting piece 27.
A guide slideway 29 is arranged on the outer edge plate body of the guide plate 18, and a limit chute 30 which is penetrated left and right is arranged on the second rotating arm 21; the sliding component 31 which can simultaneously slide along the guide slideway 29 and the limit chute 30 when the first rotating arm 20 and the second rotating arm 21 rotate along the turntable 19 is arranged on the rotating arm; the sliding component 31 comprises a sliding block 32 with a convex structure, and the sliding block 32 is inserted from the bottom of the limiting chute 30; two limiting plates 33 for preventing the sliding block 32 from falling off from the second rotating arm 21 are arranged on the top of the sliding block 32, and a guide rod 44 inserted into the guide slideway 29 is arranged on one of the limiting plates 33; a second fixed column 34 corresponding to the first fixed column 26 is arranged at the bottom of the sliding block 32; through holes are formed in two ends of the connecting arm 45, and one end of the connecting arm 45 is sleeved on the second fixing column 34; a support lug 35 is arranged on the top surface of the connecting piece 27, and the other end of the connecting arm 45 is rotatably connected with the support lug 35 on the corresponding connecting piece 27 through a screw assembly.
When the guide slide way 29 is designed, the two connecting arms 45 can open the two opening and closing plates 28 when the sliding component 31 is positioned at the lowest end so as to seal the corresponding side passing air plates; with the slide assembly 31 at the very top, the two connecting arms 45 are able to pull the two opening plates 28 closer together to promote mixing of the flue gas with the ammonia gas. That is, the guide plate 18 is designed into a sector shape with the circle center of the fixed disc 17 as the circle center, the guide slide way 29 is arranged on the outer edge of the guide plate 18, and the distance between the notch 36 at the top of the guide chute and the outer edge of the guide plate 18 is larger than the distance between the notch 36 at the bottom of the guide slide way 29 and the outer edge of the guide plate 18.
During normal operation, the telescopic device 24 acts to drive the sliding block 23 to move upwards along the sliding rail 22, and then drives the second rotating arm 21 to rotate upwards, so that the two opening and closing plates 28 move upwards in a following way; meanwhile, due to the guiding slideway 29, the sliding component 31 gradually moves towards the center of the fixed disc 17 when rotating along with the rotation, and the two connecting arms 45 can be lifted upwards, so that the two opening plates 28 have a V-shaped structure with the openings inclined towards the inner side wall of the reaction main body 7, as shown in fig. 3.
Meanwhile, in order to improve the mixing effect of the flue gas, the flue gas and the air, the bottom end plate bodies of the two opening and closing plates 28 are provided with a plurality of notches 36 in a staggered manner, and an extending plate 37 is arranged on the plate body positioned between the two notches 36, and when the V-shaped structure is presented between the two opening and closing plates 28, part of mixed gas enters the lower part through the notches 36 and is further mixed with the gas guided by the opening and closing plates 28. In general, the inclination angle of the opening and closing plate 28 with respect to the intake plate 11 is controlled within 45 ° -60 °.
Furthermore, in order to improve the effect of mixing the flue gas, a lifting mechanism 38 is further added into the flue gas mixing and plugging mechanism 15, and the lifting mechanism 38 can be a servo module or other modules capable of achieving the same effect; the lifting mechanism 38 is installed on the side wall of the reaction main body 7, the fixed plate 16 is fixedly connected with the lifting end of the lifting mechanism 38, and the lifting mechanism 38 drives the fixed plate 16 to move up and down. Meanwhile, in order to ensure stability, a guide block 39 is further arranged on the side wall of the reaction main body 7 below the lifting mechanism 38, a guide groove is formed in the guide block 39, and the side wall of the fixing plate 16 is inserted into the guide groove. The fixing plate 16 and the components on the fixing plate 16 are driven to move up and down to be adjusted to a proper height through the lifting mechanism 38, so that the smoke distribution condition under the installation height can be conveniently simulated during the trial, and the smoke mixing effect can be ensured.
When the catalyst layer 14 in one of the chambers needs to be replaced, the sliding block 23 is driven to move downwards along the sliding rail 22 by the action of the telescopic device 24, and then the second rotating arm 21 is driven to rotate downwards, so that the two opening plates 28 move downwards in a following way; also, due to the guiding slideway 29, the sliding assembly 31 gradually moves towards the side far away from the center of the fixed disc 17 when rotating, and can push the two connecting arms 45 downwards, so that the included angle between the two opening plates 28 gradually increases until the two opening plates are in a horizontal state, the extending plate 37 on one opening plate 28 is inserted into the notch 36 on the other opening plate 28 to seal the notch 36, and then the lifting mechanism 38 drives the opening plate 28 to move downwards to be attached to the top surface of the air inlet plate 11, as shown in fig. 4 and 9.
For convenience of maintenance, an access door 40 corresponding to the catalyst layer 14 is arranged on the side wall of the reaction main body 7; and provided with two sets of gas replacement units, each gas replacement unit comprising two fans (not shown in the figure), one of which is communicated with the chamber of the reaction body 7 through a gas inlet pipe 41, and is used for sucking air into the chamber above the catalyst layer 14 after the gas inlet plate 11 above the corresponding side chamber is blocked; the other fan is communicated with the chamber of the reaction main body 7 through an air outlet pipe 42 on the reaction main body 7 and is used for pumping out the air in the chamber and conveying the air into a pipeline between the boiler and the smoke inlet channel 8. Meanwhile, a smoke detector 43 for detecting the amount of nitrate in smoke is installed on the reaction body 7 located under the catalyst layer 14. The gas replacement unit and the smoke detector 43 are arranged to improve the safety during maintenance.
The foregoing is merely illustrative of the preferred embodiments of this invention, and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of this invention, and such variations and modifications are to be regarded as being within the scope of this invention.
Claims (10)
1. An integrated system for desulfurizing, denitrating and dedusting industrial flue gas is characterized in that: the flue gas desulfurization device comprises a denitration unit, a dust removal unit and a desulfurization unit, wherein the denitration unit, the dust removal unit and the desulfurization unit are sequentially communicated and arranged on a flue gas discharge path, and an air outlet end of the desulfurization unit is connected with a chimney;
the denitration unit comprises a denitration reactor, a gas replacement unit and an ammonia supply unit;
the denitration reactor comprises a reaction main body, wherein a smoke inlet channel and a smoke exhaust channel are respectively arranged at the top end and the bottom end of the reaction main body; the smoke inlet channel is connected with a smoke exhaust end pipeline of the boiler, and the smoke exhaust channel is connected with an air inlet end pipeline of the dust removal unit;
a plurality of ammonia gas inlet pipes are arranged on the smoke inlet channel in a surrounding way, and are connected with an ammonia supply unit and used for providing ammonia gas mixed with smoke gas into the denitration reactor;
an air inlet plate with a plurality of air inlet holes is horizontally arranged in the reaction main body; a partition board for dividing the interior of the reaction main body into a left cavity and a right cavity is vertically arranged below the air inlet board, a catalyst layer is detachably arranged in the cavities at two sides of the partition board, and an access door corresponding to the catalyst layer is arranged on the side wall of the reaction main body;
two side walls of the reaction main body above the air inlet plate are respectively provided with a flue gas mixing and blocking mechanism which can promote the mixing of flue gas and ammonia gas and can block the air inlet plate above the corresponding side chamber;
the gas replacement units are provided with two groups and are used for replacing the gas in the corresponding side chamber after the air inlet plate above the corresponding side chamber is blocked, and the gas is led into a pipeline between the boiler and the smoke inlet channel.
2. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 1, wherein the flue gas mixing and plugging mechanism comprises a fixed plate, a fixed plate is arranged at the bottom end of one end face of the fixed plate, which is close to the inner wall side of the reaction main body, and a guide plate is arranged at the bottom end of the fixed plate, which is far away from the reaction main body;
the front side of the fixed disc is coaxially and rotationally provided with a rotary disc, and the rotary disc is respectively provided with a rotary arm I and a rotary arm II which incline upwards towards the inside of the reaction main body and incline downwards towards the inside of the reaction main body;
a driving mechanism for driving the first rotating arm and the second rotating arm to rotate by taking the center of a circle of the turntable as an axis is arranged on a fixed plate above the fixed disk;
a first fixed column is arranged at one side, close to the inner wall of the reaction main body, of the second end of the rotating arm, two connecting pieces are rotatably arranged on the first fixed column, the two connecting pieces are positioned at two sides of the second rotating arm, and an opening and closing plate extending towards the inner side of the reaction main body is arranged at the tail end of each connecting piece;
a guide slideway is arranged on the outer edge plate body of the guide plate, and a limit chute which is penetrated left and right is arranged on the second rotating arm; the sliding component which can simultaneously slide along the guide slideway and the limiting chute when the first rotating arm and the second rotating arm rotate along with the turntable is arranged on the rotating arm;
the sliding component is connected with the two connecting pieces through connecting arms, and two ends of each connecting arm are respectively connected with the sliding component and the connecting pieces in a rotating way;
the guide slideway can ensure that when the sliding component is positioned at the lowest end, the two connecting arms can prop the two opening and closing plates open so as to seal the corresponding side passing air plates; when the sliding component is located at the topmost end, the two connecting arms can pull the two opening and closing plates closer to promote mixing of flue gas and ammonia gas.
3. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 2, wherein the driving mechanism comprises a sliding rail vertically arranged on a fixed plate, a sliding block is arranged in the sliding rail in a sliding manner, and a telescopic device fixedly connected with the sliding block is arranged on the fixed plate above the sliding rail;
a connecting rod is arranged between the sliding block and one end of the rotating arm, and the connecting rod is respectively in relative rotation connection with the sliding block and the rotating arm;
the sliding block is driven to move up and down along the sliding rail through the action of the telescopic device, and then the rotating arm I is driven to rotate by taking the circle center of the turntable as the axis through the connecting rod.
4. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 2, wherein a plurality of notches are formed in the bottom end plate bodies of the two opening plates in a staggered manner, and an extension plate is arranged on the plate body between the two notches; after the two opening plates are unfolded, the extending plate on one opening plate is inserted into the notch on the other opening plate to seal the notch.
5. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 2, wherein the sliding assembly comprises a sliding block with a convex structure, and the sliding block is inserted from the bottom of the limiting chute; two limiting plates for preventing the sliding block from falling off from the second rotating arm are arranged at the top of the sliding block, and a guide rod inserted into the guide slideway is arranged on one of the limiting plates;
a second fixed column corresponding to the first fixed column is arranged at the bottom of the sliding block; through holes are formed in two ends of the connecting arm, and one end of the connecting arm is sleeved on the second fixing column; the top surface of the connecting piece is provided with a supporting lug, and the other end of the connecting arm is rotationally connected with the supporting lug on the corresponding connecting piece through a screw rod assembly.
6. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 2, wherein the flue gas mixing and plugging mechanism further comprises a lifting mechanism, the lifting mechanism is arranged on the side wall of the reaction main body, the fixed plate is fixedly connected with the lifting end of the lifting mechanism, and the fixed plate is driven to move up and down through the lifting mechanism.
7. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 6, wherein a guide block is further arranged on the side wall of the reaction main body below the lifting mechanism, a guide groove is formed in the guide block, and the side wall of the fixing plate is inserted into the guide groove.
8. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 1, wherein the gas replacement unit comprises two exhaust fans, one exhaust fan is communicated with the reaction main body chamber through a gas inlet pipe, and after the gas inlet plate above the corresponding side chamber is plugged, the air replacement unit is used for sucking air into the chamber above the catalyst layer; the other exhaust fan is communicated with the reaction main body cavity through an air outlet pipe and is used for pumping out the air in the cavity and conveying the air into a pipeline between the boiler and the smoke inlet channel.
9. The integrated system for desulfurization, denitrification and dust removal of industrial flue gas according to claim 1, wherein a draught fan is further installed on a pipeline between the dust removal unit and the desulfurization unit.
10. The integrated system for desulfurization, denitrification and dedusting of industrial flue gas according to claim 1, wherein a flue gas detector for detecting the nitrate content of the flue gas is arranged on a reaction main body positioned below the catalyst layer.
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| CN202311200060.3A CN116920595B (en) | 2023-09-18 | 2023-09-18 | Industrial flue gas desulfurization, denitrification and dust removal integrated system |
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| CN202311200060.3A CN116920595B (en) | 2023-09-18 | 2023-09-18 | Industrial flue gas desulfurization, denitrification and dust removal integrated system |
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| CN116920595B CN116920595B (en) | 2023-12-22 |
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| CN110508133A (en) * | 2019-09-26 | 2019-11-29 | 崔小勤 | Desulfurizing industrial fume denitration, dust removal integrated system and its process |
| CN215276630U (en) * | 2021-03-18 | 2021-12-24 | 南京星空能源科技有限公司 | Desulfurization slurry pretreatment overflow device |
| CN215963022U (en) * | 2021-08-03 | 2022-03-08 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Novel vertical tube type ammonia-air mixer |
| CN116236901A (en) * | 2023-05-13 | 2023-06-09 | 山西紫光聚环保科技有限公司 | Separate-bin denitration reactor and working method thereof |
| CN219646952U (en) * | 2023-04-25 | 2023-09-08 | 华电电力科学研究院有限公司 | Adiabatic cyclone dust collector and flue gas treatment facility |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110508133A (en) * | 2019-09-26 | 2019-11-29 | 崔小勤 | Desulfurizing industrial fume denitration, dust removal integrated system and its process |
| CN215276630U (en) * | 2021-03-18 | 2021-12-24 | 南京星空能源科技有限公司 | Desulfurization slurry pretreatment overflow device |
| CN215963022U (en) * | 2021-08-03 | 2022-03-08 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Novel vertical tube type ammonia-air mixer |
| CN219646952U (en) * | 2023-04-25 | 2023-09-08 | 华电电力科学研究院有限公司 | Adiabatic cyclone dust collector and flue gas treatment facility |
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