CN114870614A - Kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system and method - Google Patents
Kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system and method Download PDFInfo
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- CN114870614A CN114870614A CN202210431880.2A CN202210431880A CN114870614A CN 114870614 A CN114870614 A CN 114870614A CN 202210431880 A CN202210431880 A CN 202210431880A CN 114870614 A CN114870614 A CN 114870614A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 54
- 230000023556 desulfurization Effects 0.000 title claims abstract description 54
- 239000002918 waste heat Substances 0.000 title claims abstract description 51
- 239000002912 waste gas Substances 0.000 title claims abstract description 29
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 246
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000003546 flue gas Substances 0.000 claims abstract description 116
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 34
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 34
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 15
- 229910052717 sulfur Inorganic materials 0.000 claims description 15
- 239000011593 sulfur Substances 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- 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
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a kiln waste gas SOx/NOx control dust removal waste heat recovery system and method, belong to the technical field of glass bottle production, kiln waste gas SOx/NOx control dust removal waste heat recovery system is including input flue and transport flue, be provided with first reaction flue between input flue and the transport flue, first reaction flue and transport flue intercommunication, first reaction flue is close to and is provided with second reaction flue in one side of input flue, second reaction flue and input flue intercommunication, be provided with third reaction flue in the first reaction flue, third reaction flue is located between first reaction flue and the second reaction flue, third reaction flue cover is established outside second reaction flue is close to one side of transport flue, the one end that third reaction flue is close to transport flue is the enclosed condition. The application has the advantages of being beneficial to enabling the flue gas and the hydrated lime powder to fully react and improving the desulfurization effect.
Description
Technical Field
The application relates to the technical field of glass bottle production, in particular to a system and a method for recovering waste heat generated by desulfurization, denitrification and dedusting of kiln waste gas.
Background
In the glass manufacturing industry, glass furnaces are a common type of melting device. The glass kiln adopts fuels such as heavy oil, coal and the like, and the discharged waste gas has a large amount of pollutants, so the waste gas of the glass kiln needs to be subjected to treatment such as desulfurization, denitration, dust removal, waste heat recovery and the like when being discharged.
In the related art, as disclosed in chinese patent document No. CN208911785U, a high temperature composite desulfurization, denitrification and dedusting integrated device for glass kiln flue gas is disclosed, which comprises a glass kiln, a waste heat recovery device, a dry desulfurization device, a denitration device and a dedusting and denitration device, wherein the waste heat recovery device comprises a waste heat boiler and a ventilation device, a flue gas input pipeline is connected between the glass kiln and the waste heat boiler, a smoke exhaust pipeline is connected between the ventilation device and the waste heat boiler, a flue is connected between the waste heat boiler and the dedusting and denitration device, the dedusting and denitration device is provided with a recycling flue communicated with the waste heat boiler, the flue is provided with a first induced draft fan, the dry desulfurization device and the denitration device are both communicated with the flue, the dry desulfurization device comprises a raw material bin, a mill, a slaked lime powder bin, a first pneumatic gate valve, a feeding injection pump, a third air compression device and an atomization injection device, the raw material bin is communicated with the mill, the mill is communicated with the slaked lime powder bin, a tail material pipe is connected between the slaked lime powder bin and the atomization injection equipment, the first pneumatic gate valve, the feeding injection pump and the third air compression equipment are all installed on the tail material pipe, and the atomization injection equipment is communicated with the flue. Flue gas in the glass kiln gets into waste heat recovery device and carries out thermal recycle, and first draught fan makes the flue gas get into the flue, and the slaked lime raw materials in the raw materials storehouse is handled through the mill and is got into slaked lime powder storehouse, opens first pneumatic push-pull valve, and the slaked lime powder gets into the flue through atomizing injection apparatus and carries out the desulfurization to the flue gas, and the flue gas after the desulfurization is handled through denitrification facility and dust removal denitrification facility again, then gets into exhaust-heat boiler through the cyclic utilization flue, discharges into in the atmosphere from ventilation unit again.
In view of the above-mentioned related technologies, the inventor found that, because the flue gas in the flue flows fast, the atomizing injection device sprays the slaked lime powder in the flue, the contact time of the flue gas and the slaked lime powder is short, the contact is not uniform, the reaction is insufficient, and the desulfurization effect is affected.
Disclosure of Invention
In order to be favorable for enabling flue gas and hydrated lime powder to fully react and improve the desulfurization effect, the application provides a system and a method for recovering the desulfurization, denitrification and dedusting waste heat of the kiln waste gas.
In a first aspect, the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system provided by the application adopts the following technical scheme:
the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system comprises an input flue communicated with a waste heat boiler and a conveying flue communicated with a dedusting and denitrification device, wherein a first reaction flue is arranged between the input flue and the conveying flue, the first reaction flue is communicated with the conveying flue, the diameter of the first reaction flue is larger than that of the input flue, a second reaction flue is arranged in one side, close to the input flue, of the first reaction flue, the second reaction flue is communicated with the input flue, a third reaction flue is arranged in the first reaction flue, the third reaction flue is positioned between the first reaction flue and the second reaction flue, the third reaction flue covers the side, close to the conveying flue, of the second reaction flue, one end, close to the conveying flue, of the third reaction flue is in a closed state, and a conveying pipeline communicated with a tailing pipe is arranged in the conveying flue in a penetrating manner, the one end intercommunication that the tail material pipe was kept away from to the conveying pipeline has the material pipe of biography, the material pipe of passing through the third reaction flue one end near the transport flue extends to in the second reaction flue, it has the branch pipe to distribute equally in the first reaction flue, in the third reaction flue and in the second reaction flue, branch pipe and material pipe intercommunication, be provided with a plurality of atomizing nozzle on the branch pipe.
By adopting the technical scheme, flue gas enters the second reaction flue through the input flue after heat recovery, then enters the third reaction flue from the second reaction flue, then enters the first reaction flue from the third reaction flue, slaked lime powder in the tailing pipe sequentially passes through the material conveying pipe and the material conveying pipe to enter each branch pipe, and finally is sprayed out from the atomizing nozzles on each branch pipe.
Preferably, the material conveying pipe is located at the center of the second reaction flue, the first reaction flue is respectively connected with the input flue and the conveying flue in a rotating mode, the material conveying pipe is connected with one end, close to the conveying flue, of the third reaction flue in a rotating mode, and a driving assembly used for driving the first reaction flue to rotate is arranged on the input flue.
Through adopting above-mentioned technical scheme, order about first reaction flue through drive assembly and drive second reaction flue and third reaction flue and rotate to drive in the first reaction flue, in the second reaction flue and the flue gas in the third reaction flue and carry out certain upset, make flue gas and atomizing nozzle spun slaked lime powder mix more abundant, help making desulfurization reaction more abundant, further improve desulfurization effect.
Preferably, the driving assembly comprises a fan blade and a transmission member, the fan blade is rotatably arranged in one side of the input flue close to the first reaction flue, the rotation axis of the fan blade is parallel to the rotation axis of the first reaction flue, and the transmission member is used for enabling the fan blade to drive the first reaction flue to rotate.
Through adopting above-mentioned technical scheme, first draught fan is introduced the flue gas in the input flue for high-speed flue gas drives the fan blade and rotates, makes the fan blade drive first reaction flue through the driving medium and rotates, and then is favorable to making more abundant of flue gas and hydrated lime powder reaction, helps improving desulfurization effect.
Preferably, the transmission part comprises a gear sleeved outside the fan blade and a gear ring arranged on the inner wall of the first reaction flue close to the input flue, the gear is positioned in the gear ring, and the gear is meshed with the gear ring.
By adopting the technical scheme, the fan blade drives the gear to rotate when rotating, and the rotation of the first reaction flue is realized through the transmission of the gear and the gear ring, so that the flue gas and the hydrated lime powder can react more fully.
Preferably, a plurality of stirring blades are arranged on the branch pipe at intervals.
By adopting the technical scheme, when the first reaction flue drives the second reaction flue and the third reaction flue to rotate, the stirring blades on the branch pipes have a certain stirring effect on the flue gas, so that the flue gas and the hydrated lime powder are further more fully reacted, and the desulfurization effect of the flue gas is improved to a certain extent.
Preferably, a plurality of first speed reducing blocks are arranged on the inner wall of the first reaction flue, the inner wall of the second reaction flue and the inner wall of the third reaction flue at intervals.
Through adopting above-mentioned technical scheme, the setting of first speed reduction piece carries out certain hindrance to the flow of flue gas to a certain extent to help slowing down the velocity of flow of flue gas, increase the reaction time of flue gas and hydrated lime powder, and then be favorable to improving the desulfurization effect of flue gas.
Preferably, the stirring blade is provided with a plurality of air passing holes.
By adopting the technical scheme, when the first reaction flue drives the second reaction flue and the third reaction flue to rotate, the gas passing holes are arranged to prevent the flue gas from generating cyclone under the drive of the stirring blades.
Preferably, the SOx concentration monitoring device is connected with the controller, the SOx concentration monitoring device is used for monitoring the sulfur concentration of flue gas in the conveying flue, the conveying flue is communicated with a smoke return pipe, one end, far away from the conveying flue, of the smoke return pipe is communicated with the input flue, an opening and closing plate used for opening and closing the conveying flue or opening and closing the smoke return pipe is arranged in the conveying flue in a rotating mode, the rotating axis of the opening and closing plate is perpendicular to the length direction of the conveying flue, a rotating part used for driving the opening and closing plate to rotate is arranged on the conveying flue, the controller is connected with the rotating part, the controller is used for controlling the rotating part to drive the opening and closing plate to rotate, and when the conveying flue is opened by the opening and closing plate, the opening and closing plate closes the smoke return pipe.
Through adopting above-mentioned technical scheme, SOx concentration monitor detects the sulphur concentration in the transport flue and sends the data that detect for the controller, and the controller carries out the analysis to data, if the sulphur concentration in the transport flue is higher than the default, then the controller control rotates the piece and orders about the board of opening and close and rotate and open the smoke return pipe with sealed transport flue, and then makes the flue gas get back to again and carry out the desulfurization in the input flue again, helps making the desulfurization of flue gas handle more abundant, in order to guarantee desulfurization effect.
Preferably, the opening and closing plate is provided with a rotating shaft, the rotating shaft rotates on the conveying flue, the rotating part comprises a worm wheel, a worm and a motor, one end of the rotating shaft penetrates through the conveying flue, the worm wheel is sleeved at one end of the rotating shaft, which is located outside the conveying flue, the worm rotates outside the conveying flue, the motor is arranged outside the conveying flue, the worm is connected with the output end of the motor, the worm is meshed with the worm wheel, and the motor is connected with the controller.
Through adopting above-mentioned technical scheme, the controller motor starts, and the motor orders about the worm and rotates, and the worm drives the worm wheel and rotates to realize the rotation of pivot and opening and close the board, help making to open and close the board and seal the transportation flue and open the smoke return pipe or seal the smoke return pipe and open the transportation flue, facilitate for improving desulfurization effect.
In a second aspect, the method for recovering the desulfurization, denitrification, dedusting and waste heat of the kiln waste gas adopts the following technical scheme:
the method for recovering the desulfurization, denitrification and dedusting waste heat of the kiln waste gas adopts the system for recovering the desulfurization, denitrification and dedusting waste heat of the kiln waste gas, and comprises the following steps:
step 1: flue gas in the glass kiln way enters a waste heat boiler, the waste heat boiler recovers and utilizes the heat of the high-temperature flue gas, and the flue gas enters a second reaction flue through an input flue under the action of a first induced draft fan;
step 2: opening a first pneumatic gate valve, enabling the hydrated lime powder to sequentially pass through a tail material pipe, a material conveying pipe and a branch pipe, spraying out from an atomizing nozzle, enabling flue gas to enter a third reaction flue from a second reaction flue, then entering a first reaction flue from the third reaction flue, and then entering a conveying flue from the first reaction flue, wherein the hydrated lime powder and the flue gas are fully contacted for desulfurization treatment;
and step 3: the driving component drives the first reaction flue to drive the second reaction flue and the third reaction flue to rotate, so that the flue gas in the first reaction flue, the second reaction flue and the third reaction flue is turned over;
and 4, step 4: the desulfurized flue gas reaches a denitration device through a conveying flue, and denitration treatment is carried out;
and 5: the flue gas after denitration reaches the dust removal and denitration device through the conveying flue, and the flue gas in the dust removal and denitration device enters the waste heat boiler through the recycling flue to continue waste heat utilization after being treated, and then is discharged into the atmosphere from the ventilation device.
In summary, the present application includes at least one of the following beneficial technical effects:
flue gas enters a second reaction flue through an input flue after heat recovery, then enters a third reaction flue from the second reaction flue, then enters a first reaction flue from the third reaction flue, slaked lime powder in a tail material pipe sequentially enters each branch pipe through a material conveying pipe and a material conveying pipe, and finally is sprayed out from atomizing nozzles on each branch pipe, so that the movement path and the reaction time of the flue gas are increased, the reaction of the flue gas and the slaked lime powder is more sufficient, and the desulfurization effect is improved to a certain extent;
the first draught fan introduces the flue gas into the input flue, so that the high-speed flue gas drives the fan blades to rotate, the fan blades drive the first reaction flue to rotate through the transmission part, the flue gas and the hydrated lime powder are enabled to react more sufficiently, the desulfurization effect is improved, and meanwhile, the cost is saved.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a partial structural sectional view in an embodiment of the present application, and is mainly used for showing the internal structure of the first reaction flue and the conveying flue.
Fig. 4 is an enlarged view of a portion B in fig. 3.
Fig. 5 is a partial structural sectional view of the first reaction flue in the embodiment of the present application, which is mainly used for showing the internal structure of the first reaction flue.
Description of reference numerals: 1. inputting the smoke channel; 2. a conveying flue; 3. a first reaction flue; 4. a second reaction flue; 5. a third reaction flue; 6. a delivery pipe; 7. a material conveying pipe; 8. a branch pipe; 9. an atomizing nozzle; 10. a drive assembly; 101. a fan blade; 102. a transmission member; 1021. a gear; 1022. a ring gear; 11. stirring blades; 12. a first deceleration block; 13. air passing holes; 14. a controller; 15. a SOx concentration monitor; 16. a smoke returning pipe; 17. a shutter plate; 18. a rotating member; 181. a worm gear; 182. a worm; 183. a motor; 19. a rotating shaft; 20. a connecting rod; 21. a second deceleration block; 22. mounting a plate; 23. a filter screen; 24. an access hole; 25. an access door.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses kiln waste gas desulfurization denitration dust removal waste heat recovery system. Referring to fig. 1 and 3, the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system comprises an input flue 1 communicated with a waste heat boiler and a conveying flue 2 communicated with a dedusting and denitration device, a first reaction flue 3 is rotatably connected between the input flue 1 and the conveying flue 2, the rotation axis of the first reaction flue 3 is parallel to the length direction of the first reaction flue 3, the diameter of the first reaction flue 3 is larger than that of the input flue 1 and the conveying flue 2, a second reaction flue 4 is fixedly connected in one side of the first reaction flue 3 close to the input flue 1, the second reaction flue 4 is communicated with the input flue 1, the diameter of the second reaction flue 4 is equal to that of the input flue 1, the second reaction flue 4 is located at the central position of the first reaction flue 3, one end of the first reaction flue 3 far away from the input flue 1 is communicated with the conveying flue 2, be provided with third reaction flue 5 in first reaction flue 3, third reaction flue 5 is located between second reaction flue 4 and first reaction flue 3, third reaction flue 5 covers establishes outside one side that second reaction flue 4 is close to transport flue 2, the diameter of third reaction flue 5 is greater than the diameter of second reaction flue 4, the diameter of third reaction flue 5 is less than the diameter of first reaction flue 3, second reaction flue 4 is close to the one end and the third reaction flue 5 intercommunication of transport flue 2, one side fixedly connected with connecting rod 20 that third reaction flue 5 is close to input flue 1, the one end fixed connection that third reaction flue 5 was kept away from to connecting rod 20 is on the inner wall that first reaction flue 3 is close to input flue 1 one side, the one end that third reaction flue 5 is close to transport flue 2 is closed state, the one end and the first reaction flue 3 intercommunication that third reaction flue 5 is close to flue input flue 1.
Referring to fig. 1 and 3, a feed delivery pipe 6 for communicating with a tailing pipe is arranged in the conveying flue 2 in a penetrating manner, the length direction of the feed delivery pipe 6 is perpendicular to the length direction of the conveying flue 2, one end, far away from the tailing pipe, of the feed delivery pipe 6 is communicated with a feed delivery pipe 7, the length direction of the feed delivery pipe 7 is parallel to the length direction of the first reaction flue 3, the feed delivery pipe 7 penetrates through one end, close to the conveying flue 2, of the third reaction flue 5 and extends into the second reaction flue 4, the feed delivery pipe 7 is rotatably connected with one end, close to the conveying flue 2, of the third reaction flue 5, the feed delivery pipe 7 is positioned at the central position of the second reaction flue 4, branch pipes 8 are uniformly distributed in the first reaction flue 3, the third reaction flue 5 and the second reaction flue 4, the branch pipes 8 in the first reaction flue 3 and the third reaction flue 5 are provided with a plurality of branch pipes 8, in the first reaction flue 3 and the third reaction flue 5 are provided with four branch pipes 8 at intervals along the circumferential direction, the branch pipes 8 are communicated with the material conveying pipe 7, two opposite sides of each branch pipe 8 are communicated with a plurality of atomizing nozzles 9 in a staggered mode, the material conveying pipe 6, the material conveying pipe 7 and the branch pipes 8 are all hard pipelines, and the input flue 1 is provided with a driving assembly 10 used for driving the first reaction flue 3 to rotate.
Referring to fig. 3 and 4, interval is crisscross to be fixed with a plurality of stirring leaves 11 on the relative both sides outer wall of every branch pipe 8, a plurality of gas holes 13 have been seted up on the stirring leaf 11, on the 3 inner walls of first reaction flue, on the 4 inner walls of second reaction flue, equal interval fixedly connected with a plurality of first speed reduction piece 12 on the 5 inner walls of third reaction flue, first speed reduction piece 12 and stirring leaf 11 are crisscross to be set up, so that the flow of flue gas, equal interval fixedly connected with second speed reduction piece 21 on the outer wall of second reaction flue 4 and third reaction flue 5, help further reducing the velocity of flow of flue gas.
When a first induced draft fan introduces flue gas discharged by a waste heat boiler into an input flue 1, the flue gas enters a second reaction flue 4 along the input flue 1, the flue gas enters a first reaction flue 3 from one side of the third reaction flue 5 close to the input flue 1 under the blocking of one end of the third reaction flue 5 close to a conveying flue 2, the flue gas enters the third reaction flue 5 from one end of the second reaction flue 4 close to the conveying flue 2, the flue gas enters the conveying flue 2 from one side of the first reaction flue 5 close to the input flue 1, slaked lime powder sequentially enters a material conveying pipe 6, a material conveying pipe 7 and a branch pipe 8 through a tailing pipe, the flue gas and the slaked lime powder are sprayed out from all atomizing nozzles 9 and react, the moving path of the flue gas and the reaction time of the flue gas and the slaked lime powder are increased by the first reaction flue 3, the second reaction flue 4 and the third reaction flue 5, the arrangement of the first speed reducing block 12 and the second speed reducing block 21 blocks the flow of the flue gas to a certain extent, which is beneficial to reducing the flow velocity of the flue gas, the driving assembly 10 drives the first reaction flue 3 to drive the second reaction flue 4 and the third reaction flue 5 to rotate, so that the flue gas is driven to turn over, the flue gas and the hydrated lime powder are beneficial to being uniformly mixed, meanwhile, the stirring blades 11 have a certain stirring effect on the flue gas, the flue gas and the hydrated lime powder are further beneficial to being fully reacted, and the desulfurization effect is further improved to a certain extent; the air passing hole 13 can prevent the smoke from generating cyclone under the driving of the stirring blade 11.
Referring to fig. 3 and 4, in order to facilitate driving the first reaction flue 3 to rotate, the driving assembly 10 includes a fan blade 101 and a transmission member 102, the fan blade 101 is rotatably disposed in one side of the input flue 1 close to the second reaction flue 4, a rotation axis of the fan blade 101 is parallel to a rotation axis of the first reaction flue 3, the transmission member 102 is used for enabling the fan blade 101 to drive the first reaction flue 3 to rotate, the transmission member 102 includes a gear 1021 fixedly disposed on an outer wall of the fan blade 101 and a gear ring 1022 embedded on an inner wall of the first reaction flue 3 close to the input flue 1, the gear 1021 is disposed in the gear ring 1022, the gear 1021 is engaged with the gear ring 1022, the first reaction flue 3, the gear 1021 and the gear ring 1022 rotate coaxially, and the first reaction flue 3, the second reaction flue 4 and the third reaction flue 5 are all light flues. In other embodiments, the driving assembly 10 can be replaced by a rack, an electric push rod and a transmission gear sleeved on the first reaction flue 3, the rack is fixed on a piston rod of the electric push rod, the rack is meshed with the transmission gear, the rack is driven by the electric push rod to slide back and forth, so that the rack drives the transmission gear to rotate back and forth, the first reaction flue 3 drives the second reaction flue 4 and the third reaction flue 5 to rotate back and forth, the flue gas can be driven to turn over, and the full reaction of the flue gas and the slaked lime powder is facilitated.
When first draught fan introduces the flue gas into input flue 1, the fast-speed flue gas orders about fan blade 101 and rotates for gear 1021 drives ring gear 1022 and rotates, and then realizes that first reaction flue 3 drives second reaction flue 4 and third reaction flue 5 and rotates, helps driving the flue gas and overturns, and stirring leaf 11 carries out certain stirring to the flue gas, thereby helps the abundant reaction of flue gas and slaked lime powder, has saved the cost to a certain extent simultaneously.
Referring to fig. 2 and fig. 3, the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system further comprises a controller 14 fixedly installed on the outer wall of the conveying flue 2 and an SOx concentration monitor 15 fixedly installed on the conveying flue 2, the SOx concentration monitor 15 is located on one side of the conveying pipe 6 far away from the first reaction flue 3, the SOx concentration monitor 15 is connected with the controller 14, the SOx concentration monitor 15 is used for monitoring the sulfur-containing concentration of the flue gas in the conveying flue 2, a smoke return pipe 16 is communicated with the conveying flue 2, the diameter of the smoke return pipe 16 is equal to that of the conveying flue 2, one end of the smoke return pipe 16 far away from the conveying flue 2 is communicated with the input flue 1, one end of the smoke return pipe 16 close to the conveying flue 2 is located on one side of the SOx concentration monitor 15 far away from the first reaction flue 3, an opening and closing plate 17 for opening and closing the conveying flue 2 or opening and closing the smoke return pipe 16 is rotatably arranged in the conveying flue 2, the diameter of the opening and closing plate 17 is matched with that of the conveying flue 2, the opening and closing plate 17 is a soft plate, the opening and closing plate 17 is located on one side of the smoke returning pipe 16 far away from the input flue 1, a rotating shaft 19 is fixedly connected to the opening and closing plate 17, the rotating shaft 19 rotates in the conveying flue 2, the rotating axis of the opening and closing plate 17 is perpendicular to the length direction of the conveying flue 2, the rotating shaft 19 is located on one side of the opening and closing plate 17 close to the smoke returning pipe 16, and a rotating part 18 used for driving the opening and closing plate 17 to rotate is arranged on the conveying flue 2.
Referring to fig. 2 and 3, in order to facilitate the opening and closing plate 17 to rotate, the mounting plate 22 is fixed on the outer wall of the conveying flue 2, the rotating member 18 includes a worm wheel 181, a worm 182 and a motor 183, one end of the rotating shaft 19 penetrates through the conveying flue 2, the worm wheel 181 is sleeved on one end of the rotating shaft 19 located outside the conveying flue 2, the worm 182 rotates on the mounting plate 22, the motor 183 is fixedly mounted on the mounting plate 22, the worm 182 is connected with the output end of the motor 183, the worm 182 is meshed with the worm wheel 181, the motor 183 is connected with the controller 14, the controller 14 is configured to enable the motor 183 to drive the opening and closing plate 17 to rotate, and when the opening and closing plate 17 opens the conveying flue 2, the opening and closing plate 17 closes the smoke return pipe 16.
The SOx concentration monitor 15 monitors the sulfur concentration of the flue gas in the conveying flue 2, and sends the sulfur concentration value of the flue gas in the conveying flue 2 to the controller 14, the controller 14 analyzes the sulfur concentration value of the flue gas in the conveying flue 2, if the sulfur concentration value of the flue gas in the conveying flue 2 is higher than a preset value, the control motor 183 drives the worm 182 to rotate, the worm 182 drives the worm wheel 181 to rotate, the opening and closing plate 17 rotates towards the direction far away from the smoke return pipe 16, the smoke return pipe 16 is opened and the conveying flue 2 is closed, and then the flue gas coming out of the first reaction flue 3 returns to the input flue 1 through the smoke return pipe 16 and then carries out desulfurization reaction; if the sulfur concentration value of the flue gas in the conveying flue 2 is lower than the preset value, the control motor 183 drives the worm 182 to rotate, the worm 182 drives the worm wheel 181 to rotate, and the opening and closing plate 17 rotates towards the direction close to the smoke return pipe 16 to close the smoke return pipe 16 and open the conveying flue 2, so that the flue gas enters the next process from the conveying flue 2.
Referring to fig. 2 and 4, one side of the fan blade 101 away from the first reaction flue 3 is connected with a filter screen 23 through a screw, an access hole 24 is formed in the input flue 1, an access door 25 used for opening and closing the access hole 24 is hinged to the inner wall of the access hole 24, a bolt is arranged on the access door 25 in a threaded penetrating mode, and a threaded hole used for being matched with the bolt in a threaded mode is formed in the input flue 1.
When the filter screen 23 needs to be cleaned, the bolt is rotated to separate the bolt from the threaded hole, then the access door 25 is rotated towards the direction far away from the access opening 24, the access opening 24 is opened by the access door 25, the bolt on the filter screen 23 is separated from the fan blade 101, and the filter screen 23 can be taken out for cleaning; after cleaning, the filter screen 23 is connected to the fan blade 101 through screws, and then the access door 25 is rotated towards the direction close to the access opening 24 to seal the access opening 24, so that the access door 25 and the input flue 1 are relatively fixed through bolts.
The embodiment also discloses a method for recovering the desulfurization, denitrification, dedusting and waste heat of the kiln waste gas, which comprises the following steps:
step 1: flue gas in the glass kiln way enters a waste heat boiler, the waste heat boiler recovers and utilizes the heat of the high-temperature flue gas, and the flue gas enters a second reaction flue 4 through an input flue 1 under the action of a first induced draft fan;
step 2: high-speed flue gas is filtered by the filter screen 23, and then the fan blades 101 are driven to rotate, so that the gear 1021 drives the gear ring 1022 to rotate, the first reaction flue 3 drives the second reaction flue 4 and the third reaction flue 5 to rotate relative to the stirring blades 11, and the stirring blades 11 have a stirring effect on the flue gas;
and step 3: opening a first pneumatic gate valve, enabling the hydrated lime powder to sequentially pass through a tail material pipe, a material conveying pipe 6, a material conveying pipe 7 and a branch pipe 8, spraying out from an atomizing nozzle 9, enabling the flue gas to enter a third reaction flue 5 from a second reaction flue 4, then entering a first reaction flue 3 from the third reaction flue 5, then entering a conveying flue 2 from the first reaction flue 3, and enabling the flue gas to be fully contacted with the hydrated lime powder under the condition of overturning to perform desulfurization treatment;
and 4, step 4: the SOx concentration monitor 15 monitors the sulfur concentration of the flue gas in the conveying flue 2, and sends the sulfur concentration of the flue gas in the conveying flue 2 to the controller 14, if the sulfur concentration of the flue gas in the conveying flue 2 is higher than a preset value, the controller 14 controls the motor 183 to drive the worm 182 to rotate, so that the opening and closing plate 17 rotates towards the direction far away from the smoke return pipe 16, the smoke return pipe 16 is opened, the conveying flue 2 is closed, and the flue gas coming out of the first reaction flue 3 returns to the input flue 1 through the smoke return pipe 16; if the sulfur concentration value of the flue gas in the conveying flue 2 is lower than the preset value, the controller 14 controls the motor 183 to drive the worm 182 to rotate, so that the opening and closing plate 17 rotates towards the direction close to the smoke return pipe 16 to close the smoke return pipe 16 and open the conveying flue 2;
and 5: the flue gas after desulfurization reaches a denitration device through a conveying flue 2, and denitration treatment is carried out;
step 6: the flue gas that accomplishes denitration treatment passes through conveying flue 2 and reaches dust removal denitrification facility department, and the flue gas in the dust removal denitrification facility is handled, gets into exhaust-heat boiler through cyclic utilization flue and continues waste heat utilization, then discharges into the atmosphere from ventilation unit.
The implementation principle of the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system provided by the embodiment of the application is as follows:
the first induced draft fan introduces flue gas exhausted by the waste heat boiler into the input flue 1, the flue gas enters the second reaction flue 4 along the input flue 1 after being filtered by the filter screen 23, at the moment, the first pneumatic gate valve is opened to enable slaked lime powder to sequentially enter the material conveying pipe 6, the material conveying pipe 7 and the branch pipe 8 through the tailing pipe and finally to be sprayed out of each atomizing nozzle 9, the high-speed flue gas drives the fan blades 101 to rotate, the gear 1021 drives the gear ring 1022 to rotate, and therefore the first reaction flue 3 drives the second reaction flue 4 and the third reaction flue 5 to rotate; the flue gas in the second reaction flue 4 enters the third reaction flue 5 from one end of the second reaction flue 4 close to the conveying flue 2 under the blocking of the third reaction flue 5 close to one side of the conveying flue 2, then enters the first reaction flue 3 from one side of the third reaction flue 5 close to the input flue 1, finally enters the conveying flue 2 from one end of the first reaction flue 3 close to the conveying flue 2, the arrangement of the first speed reducing block 12 and the second speed reducing block 21 blocks the flow of the flue gas to a certain extent, which is beneficial to reducing the flow velocity of the flue gas, when the first reaction flue 3 drives the second reaction flue 4 and the third reaction flue 5 to rotate, the flue gas is driven to turn over, at the moment, the stirring blades 11 have a certain stirring effect on the flue gas, thereby being beneficial to the full reaction of the flue gas and the hydrated lime powder and improving the desulfurization effect to a certain extent.
The desulfurized flue gas enters the conveying flue 2 from the first reaction flue 3, the SOx concentration monitor 15 monitors the sulfur-containing concentration of the flue gas in the conveying flue 2 and sends a data value to the controller 14, the controller 14 analyzes the data value, if the sulfur-containing concentration value of the flue gas in the conveying flue 2 is higher than a preset value, the control motor 183 drives the worm 182 to rotate, the worm 182 drives the worm wheel 181 to rotate, the opening and closing plate 17 rotates towards the direction far away from the smoke return pipe 16, the opening and closing plate 17 opens the smoke return pipe 16 and closes the conveying flue 2, and then the flue gas coming out of the first reaction flue 3 enters the input flue 1 through the smoke return pipe 16 to carry out desulfurization reaction again; if the sulfur concentration value of the flue gas in the conveying flue 2 is lower than the preset value, the controller 14 controls the motor 183 to drive the worm 182 to rotate, the worm 182 drives the worm wheel 181 to rotate, and the opening and closing plate 17 rotates towards the direction close to the smoke return pipe 16 to close the smoke return pipe 16 and open the conveying flue 2, so that the flue gas enters the dedusting and denitration device through the conveying flue 2.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. Kiln waste gas SOx/NOx control dust removal waste heat recovery system, including be used for with input flue (1) of exhaust-heat boiler intercommunication and be used for with transport flue (2) of dust removal denitrification facility intercommunication, its characterized in that: the reaction device is characterized in that a first reaction flue (3) is arranged between the input flue (1) and the conveying flue (2), the first reaction flue (3) is communicated with the conveying flue (2), the diameter of the first reaction flue (3) is larger than that of the input flue (1), a second reaction flue (4) is arranged in one side, close to the input flue (1), of the first reaction flue (3), the second reaction flue (4) is communicated with the input flue (1), a third reaction flue (5) is arranged in the first reaction flue (3), the third reaction flue (5) is arranged between the first reaction flue (3) and the second reaction flue (4), the third reaction flue (5) covers the side, close to the conveying flue (2), of the second reaction flue (4), and one end, close to the conveying flue (2), of the third reaction flue (5) is in a closed state, wear to be equipped with conveying pipeline (6) that are used for with the tails pipe intercommunication in carrying flue (2), the one end intercommunication that tail material pipe was kept away from in conveying pipeline (6) has and passes material pipe (7), it runs through in third reaction flue (5) one end that third reaction flue (7) are close to carrying flue (2) extends to second reaction flue (4), it has branch pipe (8) to equally divide cloth in first reaction flue (3), third reaction flue (5) and second reaction flue (4), branch pipe (8) and conveying pipe (7) intercommunication, be provided with a plurality of atomizing nozzle (9) on branch pipe (8).
2. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 1, is characterized in that: the material conveying pipe (7) is located at the center of the second reaction flue (4), the first reaction flue (3) is respectively connected with the input flue (1) and the conveying flue (2) in a rotating mode, one end, close to the conveying flue (2), of the material conveying pipe (7) and the third reaction flue (5) is connected in a rotating mode, and a driving assembly (10) used for driving the first reaction flue (3) to rotate is arranged on the input flue (1).
3. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 2, characterized in that: the driving assembly (10) comprises a fan blade (101) and a transmission piece (102), the fan blade (101) is rotatably arranged in one side of the input flue (1) close to the first reaction flue (3), the rotating axis of the fan blade (101) is parallel to the rotating axis of the first reaction flue (3), and the transmission piece (102) is used for enabling the fan blade (101) to drive the first reaction flue (3) to rotate.
4. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 3, is characterized in that: the transmission part (102) comprises a gear (1021) sleeved outside the fan blade (101) and a gear ring (1022) arranged on the inner wall of the first reaction flue (3) close to one side of the input flue (1), the gear (1021) is located in the gear ring (1022), and the gear (1021) is meshed with the gear ring (1022).
5. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 1, is characterized in that: a plurality of stirring blades (11) are arranged on the branch pipe (8) at intervals.
6. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 5, is characterized in that: a plurality of first speed reducing blocks (12) are arranged on the inner wall of the first reaction flue (3), the inner wall of the second reaction flue (4) and the inner wall of the third reaction flue (5) at intervals.
7. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 5, is characterized in that: the stirring blade (11) is provided with a plurality of air passing holes (13).
8. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 1, is characterized in that: the device is characterized by further comprising a controller (14) and an SOx concentration monitor (15) arranged on the conveying flue (2), wherein the SOx concentration monitor (15) is connected with the controller (14), the SOx concentration monitor (15) is used for monitoring the sulfur-containing concentration of flue gas in the conveying flue (2), the conveying flue (2) is communicated with a smoke return pipe (16), one end, far away from the conveying flue (2), of the smoke return pipe (16) is communicated with the input flue (1), an opening and closing plate (17) used for opening and closing the conveying flue (2) or opening and closing the smoke return pipe (16) is rotatably arranged in the conveying flue (2), the rotating axis of the opening and closing plate (17) is perpendicular to the length direction of the conveying flue (2), a rotating piece (18) used for driving the opening and closing plate (17) to rotate is arranged on the conveying flue (2), and the controller (14) is connected with the rotating piece (18), the controller (14) is used for controlling the rotating piece (18) to drive the opening and closing plate (17) to rotate, and when the opening and closing plate (17) opens the conveying flue (2), the opening and closing plate (17) closes the smoke returning pipe (16).
9. The kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as claimed in claim 8, is characterized in that: be provided with pivot (19) on board (17) opens and shuts, pivot (19) are rotated on carrying flue (2), it includes worm wheel (181), worm (182) and motor (183) to rotate piece (18), the one end of pivot (19) is run through and is carried flue (2), worm wheel (181) cover is established and is located the outer one end of carrying flue (2) in pivot (19), worm (182) rotate outside carrying flue (2), motor (183) set up outside carrying flue (2), the output of worm (182) and motor (183) is connected, worm (182) and worm wheel (181) mesh, motor (183) and controller (14) are connected.
10. The method for recovering the desulfurization, denitrification, dedusting and waste heat of the kiln waste gas is characterized by comprising the following steps of: the kiln waste gas desulfurization, denitrification, dedusting and waste heat recovery system as defined in any one of claims 2-9 is adopted, and comprises the following steps:
step 1: flue gas in the glass kiln way enters a waste heat boiler, the waste heat boiler recovers and utilizes the heat of the flue gas, and the flue gas enters a second reaction flue (4) through an input flue (1) under the action of a first induced draft fan;
step 2: opening a first pneumatic gate valve, enabling slaked lime powder to sequentially pass through a tail material pipe, a material conveying pipe (6), a material conveying pipe (7) and a branch pipe (8), spraying out from an atomizing nozzle (9), enabling flue gas to enter a third reaction flue (5) from a second reaction flue (4), enabling the flue gas to enter a first reaction flue (3) from the third reaction flue (5), enabling the flue gas to enter a conveying flue (2) from the first reaction flue (3), and enabling the slaked lime powder to be in full contact with the flue gas to perform desulfurization treatment;
and step 3: the driving component (10) drives the first reaction flue (3) to drive the second reaction flue (4) and the third reaction flue (5) to rotate, so that the flue gas in the first reaction flue (3), the second reaction flue (4) and the third reaction flue (5) is turned over;
and 4, step 4: the flue gas after desulfurization reaches a denitration device through a conveying flue (2) to be subjected to denitration treatment;
and 5: the flue gas after denitration reaches the dust removal and denitration device through the conveying flue (2), and the flue gas in the dust removal and denitration device is treated, enters the waste heat boiler through the recycling flue to continue waste heat utilization, and then is discharged into the atmosphere from the ventilation device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210431880.2A CN114870614B (en) | 2022-04-23 | 2022-04-23 | Kiln waste gas desulfurization, denitrification and dedusting waste heat recovery system and method thereof |
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| CN202210431880.2A CN114870614B (en) | 2022-04-23 | 2022-04-23 | Kiln waste gas desulfurization, denitrification and dedusting waste heat recovery system and method thereof |
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| CN114870614B (en) | 2023-10-31 |
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