CN115318030A - Wet-type desulfurization and denitrification operation device and method for regenerated flue gas in cement kiln tail - Google Patents
Wet-type desulfurization and denitrification operation device and method for regenerated flue gas in cement kiln tail Download PDFInfo
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- CN115318030A CN115318030A CN202211061987.9A CN202211061987A CN115318030A CN 115318030 A CN115318030 A CN 115318030A CN 202211061987 A CN202211061987 A CN 202211061987A CN 115318030 A CN115318030 A CN 115318030A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 239000003546 flue gas Substances 0.000 title claims abstract description 119
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 47
- 230000023556 desulfurization Effects 0.000 title claims abstract description 47
- 239000004568 cement Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 133
- 238000001914 filtration Methods 0.000 claims abstract description 40
- 239000000779 smoke Substances 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 230000008929 regeneration Effects 0.000 claims abstract description 5
- 238000011069 regeneration method Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 52
- 230000003009 desulfurizing effect Effects 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 23
- 230000003197 catalytic effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000003517 fume Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 5
- 241000883990 Flabellum Species 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims 3
- 239000008187 granular material Substances 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 description 28
- 238000006555 catalytic reaction Methods 0.000 description 12
- 229910052815 sulfur oxide Inorganic materials 0.000 description 9
- 239000010881 fly ash Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
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- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
-
- 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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- 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
-
- 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
-
- 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
- B01D53/88—Handling or mounting catalysts
-
- 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
- B01D2258/0233—Other waste gases from cement factories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/20—Shape of filtering material
- B01D2275/201—Conical shape
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a wet desulfurization and denitration operation device and method for regenerated flue gas in a cement kiln tail, and relates to the technical field of wet desulfurization and denitration. The dust collector aims to solve the problems that the dust content in the tail flue gas of a cement kiln is high, the diameter of the tail flue gas is large, filter holes of a traditional dust collector are blocked in the dust collecting process, the filtering efficiency of the dust collector in the prior art is influenced, and the emission of the flue gas is influenced. The utility model provides a regeneration flue gas wet-type SOx/NOx control running gear in cement kiln tail, including kiln tail flue gas dust removal mechanism, flue gas denitration mechanism and wet-type SOx/NOx control mechanism, filter to dust filter funnel upper end through passing through dust filter funnel lower extreme with cement kiln tail flue gas, large granule dust and impurity in the filtration flue gas, first motor drives the dust filter brush strip at the dust filter funnel internal rotation, cause vibrations to dust filter funnel surface when clearing up dust filter funnel, avoid the jam of filtration pore, smoke exhaust fan drives the flue gas and carries to in the smoke exhaust pipe, the velocity of flow of flue gas at the incasement that gathers dust has been guaranteed, and the filtration efficiency is improved.
Description
Technical Field
The invention relates to the technical field of wet desulfurization and denitration, in particular to a device and a method for wet desulfurization and denitration operation of regenerated flue gas in a cement kiln tail.
Background
The desulfurization and denitrification of the regenerated flue gas in the tail of the cement kiln are generally carried out by adopting a catalytic reduction method, and the method has the advantages of no secondary pollution discharge problem, high denitrification efficiency, capability of realizing ultra-clean discharge, reliable and stable operation, adaptability to load fluctuation and the like, and is widely applied to various industrial and mining enterprises. There are related patents for desulfurization and denitrification of regenerated flue gas in cement kiln tail, such as application numbers: CN201911338183.7 discloses a desulfurization and denitrification system for cement flue gas, which removes sulfur oxides and nitrogen oxides through an alkaline absorbent reaction; the oxidation device of setting on the entry flue of absorption tower, the second denitration agent that oxidant preparation facilities made spouts the flue gas through high density jet mixing device in, this patent utilizes SNCR denitrification facility and oxidation denitrification facility to realize the two-stage denitration, and the denitration is efficient, has overcome the defect that single-stage denitration is inefficient, and investment and working costs are lower, and the SOx/NOx control can be realized simultaneously in the secondary denitration process to reach high-efficient SOx/NOx control.
However, although the above patent solves the problem of low efficiency of single-stage denitration, the following problems still exist in the practical use process:
1. the fly ash at the tail of the cement kiln has high CaO content and high viscosity; and the particle size of the fly ash is small, and the fly ash is easily adsorbed on the surface of the catalyst to block micropores of the catalyst when contacting with the catalyst, so that the activity of the catalyst is reduced, and the service life of the catalyst is influenced.
2. The cement kiln tail flue gas has high dust content and large diameter, and a filter hole is blocked in the dust collecting process of a traditional dust collector, so that the filtering efficiency of the dust collector in the prior art is influenced, and the emission of flue gas is influenced.
3. Can't lead to cement kiln tail flue gas, lead to the condition of flue gas refluence in equipment, can't guarantee to spray the layer and the reverse contact of flue gas.
Disclosure of Invention
The invention aims to provide a wet-type desulfurization and denitrification operation device and method for regenerated flue gas in cement kiln tail.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a regeneration flue gas wet-type SOx/NOx control running gear in cement kiln tail, including kiln tail flue gas dust removal mechanism, flue gas denitration mechanism and wet-type SOx/NOx control mechanism, kiln tail flue gas dust removal mechanism includes kiln tail bag connecting pipe, dust collecting box and exhaust pipe, dust collecting box one side and kiln tail bag connecting pipe fixed connection, the observation window has been seted up on dust collecting box surface, observation window one side is opened and shut through hinge and dust collecting box and is connected, dust collecting box upper surface and exhaust pipe fixed connection, flue gas denitration mechanism includes denitration tower and denitration pipeline, denitration tower upper surface and exhaust pipe one end fixed connection, denitration tower one side and denitration pipeline fixed connection, wet-type SOx/NOx control mechanism includes desulfurizing tower and desulfurization pipeline, desulfurizing tower one side and denitration pipeline one end fixed connection, desulfurizing tower upper surface and desulfurization pipeline fixed connection.
Furthermore, the upper end of the dust collection box is provided with a smoke outlet matched with the smoke exhaust pipe, the inner wall of the dust collection box is respectively provided with a smoke exhaust fan and a dust filter funnel, the smoke exhaust fan is arranged above the dust filter funnel, the lower surface of the dust filter funnel is fixedly connected with a first motor through a bolt, the lower surface of the first motor is fixedly connected with the lower surface of the inner wall of the dust collection box through a bolt, and the surfaces of the dust filter funnels are respectively provided with uniformly distributed dust filter holes.
Furthermore, the inner wall of the dust filter funnel is provided with a dust filter brush strip, the dust filter brush strip is arranged to be an inclined column matched with the inner wall of the dust filter funnel, a brush head is arranged on one side close to the inner wall of the dust filter funnel, the brush head is in contact with the inner wall of the dust filter funnel, the lower surface of the dust filter brush strip is fixedly connected with one end of an eccentric plate through a bolt, and the other end of the eccentric plate is fixedly connected with a motor shaft of a first motor through a bolt.
Further, dust-proof boxes are respectively installed on two sides of the upper surface of the denitration tower, a sliding groove matched with the toothed ring is formed in the inner wall of each dust-proof box, the toothed ring is connected with the dust-proof boxes in a sliding mode, a movable groove matched with the toothed ring is formed in the denitration tower, a flue gas guide device, a first reaction device and a second reaction device are respectively installed in the denitration tower, the second reaction device is arranged below the first reaction device and tightly connected with the inner wall of the denitration tower, and an opening communicated with a denitration pipeline is formed in one side below the second reaction device.
Further, flue gas guider includes the guide roll, backing roll and second motor, the guide roll symmetry respectively sets up in the backing roll both sides, the guide roll surface is provided with evenly distributed's flabellum, backing roll one end is passed through the bearing and is connected with the rotation of dust proof box inner wall, the motor shaft fixed connection of the backing roll other end and second motor, second motor and dust proof box inner wall fixed connection, the cover has the driving disc on the backing roll, the driving disc surface is provided with gear portion, the ring gear inner wall is provided with the internal gear groove, gear portion and internal gear groove meshing.
Further, gear portion sets up in driving plate one side, and internal gear groove central symmetry sets up at the ring gear inboard, and gear portion sets up to evenly distributed's tooth, and internal gear groove sets up to the tooth's socket corresponding with the tooth.
Furthermore, the first reaction device comprises a first honeycomb catalysis plate, a second honeycomb catalysis plate and a fixed guide sleeve, the outer wall of the fixed guide sleeve is provided with symmetrical guide sliding strips, the inner wall of the denitration tower is provided with a guide groove for the guide sliding strips to move, the inner wall of the fixed guide sleeve is fixedly connected with the first honeycomb catalysis plate and the second honeycomb catalysis plate respectively, and the upper surface of the guide sliding strip is fixedly connected with the toothed ring through a support rod respectively.
Further, the second reaction unit comprises a catalysis plate body and a metal steel mesh, the metal steel mesh is fixedly connected with the inner wall of the denitration tower, and the catalysis plate body is fixedly connected with the metal steel mesh.
Further, the desulfurizing tower inner wall is provided with respectively sprays layer and defroster, sprays the layer and comprises spray header and shower head body, sprays the layer and sets up to three groups and parallel arrangement respectively, and spray header runs through desulfurizing tower one side respectively and is linked together through pipeline and external water source, and the defroster setting is spraying layer upper end, and the desulfurizing tower upper surface is provided with the opening with desulfurizing pipeline looks adaptation, and desulfurizing pipeline is linked together with the exhaust fume tower.
The invention provides another technical scheme, and an operation method of a wet type desulfurization and denitrification operation device for regenerated flue gas in a cement kiln tail comprises the following steps:
the method comprises the following steps: flue gas in the cement kiln tail enters a dust collection box through a kiln tail bag connecting pipe, and large particle dust and impurities in the flue gas are preliminarily filtered;
step two: the filtered flue gas is added into a flue gas discharge pipe through a flue gas discharge fan, and the flue gas is conveyed to a first reaction device and a second reaction device in sequence by matching with a guide roller for reaction so as to carry out denitration;
step three: the flue gas after denitration gets into the desulfurizing tower through the denitration pipeline in, sprays the layer and sprays with flue gas reverse contact, and the complete reaction desulfurization, the clean flue gas after the desulfurization is got rid of the steam and is arranged to the exhaust fume column and discharge.
Compared with the prior art, the invention has the beneficial effects that:
1. through filtering cement kiln tail flue gas to the dust filter funnel upper end through the dust filter funnel lower extreme, large granule dust and impurity in the filtration flue gas, first motor drives the dust filter brush strip at the dust filter funnel internal rotation, cause vibrations to the dust filter funnel surface when clearing up the dust filter funnel, shake off the dust in the dust filter funnel outside, avoid the jam in filtration pore, smoke exhaust fan drives the flue gas and carries to discharging fume intraductally, has guaranteed the velocity of flow of flue gas in the case that gathers dust, improves filtration efficiency.
2. Drive the backing roll through the second motor and rotate, thereby the guide roll drives the synchronous rotation of flabellum, guide its inside flue gas, carry the flue gas to first reaction unit and second reaction unit department, drive the synchronous rotation of driving disc when the backing roll pivoted, carry out reciprocating motion from top to bottom at the driving disc pivoted with its meshed ring gear, thereby drive first reaction unit and reciprocate, guarantee flue gas and first reaction unit and the abundant contact reaction of second reaction unit, prevent the flue gas refluence, improve the flue gas and take off the round pin efficiency.
3. Catalyze the flue gas through first honeycomb catalysis board and second honeycomb catalysis board, when receiving flue gas ash content wearing and tearing simultaneously, do not influence catalyst performance, reciprocate through fixed guide pin bushing and cause vibrations to first honeycomb catalysis board and second honeycomb catalysis board, cooperation catalysis board body uses the metal steel mesh as the substrate, flexible structure has, when the flue gas flows through the catalysis board body, the incessant vibration of catalyst veneer in the flue gas, make the flying dust be difficult to adhere to the catalyst surface, make the advantage of two kinds of catalysts all obtain make full use.
Drawings
FIG. 1 is an isometric view of the overall construction of the present invention;
FIG. 2 is an isometric view of the dust collection box of the present invention;
FIG. 3 is a cross-sectional isometric view of the dust collection box of the present invention;
FIG. 4 is a cutaway, isometric view of a dust filter funnel of the present invention;
FIG. 5 is a partial cross-sectional isometric view of a denitration tower of the present invention;
FIG. 6 is a perspective view of the connection shaft of the flue gas guiding device of the present invention with a first reaction device and a second reaction device;
FIG. 7 is an exploded isometric view of a first reaction apparatus of the present invention;
fig. 8 is an isometric view of a desulfurization tower of the present invention.
In the figure: 1. a kiln tail flue gas dust removal mechanism; 11. a kiln tail bag connecting pipe; 12. a dust collection box; 13. a smoke exhaust pipe; 14. an observation window; 15. a smoke outlet; 16. a smoke exhaust fan; 17. a dust filter funnel; 18. a first motor; 19. a dust filtration brush bar; 191. an eccentric plate; 2. a flue gas denitration mechanism; 21. a denitration tower; 22. a denitration pipeline; 23. a dust-proof box; 24. a toothed ring; 241. an inner gear groove; 25. a flue gas guide device; 251. a guide roller; 252. a support roller; 253. a second motor; 254. a transmission disc; 255. a gear portion; 256. a fan blade; 26. a first reaction device; 261. a first honeycomb catalyst plate; 262. a second honeycomb catalyst plate; 263. fixing the guide sleeve; 264. a guide slider; 27. a second reaction device; 271. a catalyst plate body; 272. a metal steel mesh; 28. a stay bar; 3. a wet desulfurization mechanism; 31. a desulfurizing tower; 311. a spray layer; 312. a demister; 32. and (4) a desulfurization pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the technical problems that the layout of a traditional kiln tail raw material workshop is compact, the space cannot be reserved for a desulfurization system and a denitrification system during the construction and planning of a production line, and the occupied area of a desulfurization and denitrification operation device is large, please refer to fig. 1, the embodiment provides the following technical scheme:
the utility model provides a regeneration flue gas wet-type SOx/NOx control running gear in cement kiln tail, including kiln tail flue gas dust removal mechanism 1, flue gas denitration mechanism 2 and wet-type SOx/NOx control mechanism 3, kiln tail flue gas dust removal mechanism 1 includes kiln tail bag connecting pipe 11, gather dust case 12 and exhaust pipe 13, it is connected with kiln tail bag connecting pipe 11 fixed connection to gather dust case 12 one side, observation window 14 has been seted up on the surface of case 12 that gathers dust, observation window 14 one side is passed through the hinge and is connected with the case 12 that gathers dust, gather dust case 12 upper surface and exhaust pipe 13 fixed connection, flue gas denitration mechanism 2 includes denitration tower 21 and denitration pipeline 22, denitration tower 21 upper surface and exhaust pipe 13 one end fixed connection, denitration tower 21 one side and denitration pipeline 22 fixed connection, wet-type SOx/NOx control mechanism 3 includes desulfurizing tower 31 and desulfurization pipeline 32, desulfurizing tower 31 one side and denitration pipeline 22 one end fixed connection, desulfurizing tower 31 upper surface and desulfurization pipeline 32 fixed connection.
Specifically, through kiln tail flue gas dust removal mechanism 1, flue gas denitration mechanism 2 and wet-type desulfurization mechanism 3 pass through the pipe connection, overall structure is compact, and area is little, greatly reduced desulfurization system and deNOx systems's design, construction, installation degree of difficulty.
In order to solve the technical problems that the conventional dust collector causes the blockage of filter holes in the dust collecting process, the filtering efficiency of the dust collector in the prior art is affected, and the emission of flue gas is affected, please refer to fig. 2-4, the embodiment provides the following technical scheme:
the upper end of the dust collection box 12 is provided with a smoke outlet 15 matched with the smoke exhaust pipe 13, the inner wall of the dust collection box 12 is respectively provided with a smoke exhaust fan 16 and a dust filtering funnel 17, the smoke exhaust fan 16 is arranged above the dust filtering funnel 17, the lower surface of the dust filtering funnel 17 is fixedly connected with a first motor 18 through a bolt, the lower surface of the first motor 18 is fixedly connected with the lower surface of the inner wall of the dust collection box 12 through a bolt, the surface of the dust filtering funnel 17 is respectively provided with dust filtering holes which are uniformly distributed, the inner wall of the dust filtering funnel 17 is provided with a dust filtering brush strip 19, the dust filtering brush strip 19 is an inclined cylinder matched with the inner wall of the dust filtering funnel 17, one side close to the inner wall of the dust filtering funnel 17 is provided with a brush head, the brush head is contacted with the inner wall of the dust filtering funnel 17, the lower surface of the dust filtering brush strip 19 is fixedly connected with one end of an eccentric plate 191 through a bolt, and the other end of the eccentric plate 191 is fixedly connected with a motor shaft of the first motor 18 through a bolt.
Specifically, through filtering cement kiln tail flue gas to filter dust hopper 17 upper end through filtering dust hopper 17 lower extreme, large granule dust and impurity in the filtration flue gas, first motor 18 drives and strains dust brush 19 at the internal rotation of dust hopper 17, cause vibrations to dust hopper 17 surface when clearing up dust hopper 17, shake off the dust in the dust hopper 17 outside, avoid the jam of filtration pore, exhaust fan 16 drives the flue gas and carries to in discharging fume pipe 13, guaranteed the velocity of flow of flue gas in case 12 gathers dust, and the filtration efficiency is improved.
In order to solve the technical problems that the flue gas at the tail of the cement kiln cannot be guided in the prior art, the flue gas flows backwards in the equipment, and the reverse contact between the spraying layer and the flue gas cannot be ensured, please refer to fig. 5-7, the embodiment provides the following technical scheme:
Specifically, the supporting roller 252 is driven to rotate by the second motor 253, so that the guide roller 251 drives the fan blades 256 to synchronously rotate, the smoke in the guiding roller is guided, the smoke is conveyed to the first reaction device 26 and the second reaction device 27, the supporting roller 252 drives the driving disc 254 to synchronously rotate while rotating, the toothed ring 24 meshed with the supporting roller carries out vertical reciprocating motion while the driving disc 254 rotates, so that the first reaction device 26 is driven to vertically move, full contact reaction between the smoke and the first reaction device 26 and the second reaction device 27 is guaranteed, backflow of the smoke is prevented, and the smoke denitration efficiency is improved.
The working principle is as follows: the second motor 253 rotates to drive the transmission disc 254 to synchronously rotate, the gear part 255 on the transmission disc 254 is meshed with the inner gear groove 241 on one side in the gear ring 24 to drive the gear ring 24 to move upwards and horizontally, when the outmost teeth of the gear part 255 are meshed with the tooth grooves on the lower end of the inner gear groove 241, the outmost teeth of the gear part 255 are meshed with the tooth grooves on the lower end of the inner gear groove 241 on the other side in the gear ring 24 to drive the gear ring 24 to move downwards and horizontally, and so on, so that the reciprocating motion of the gear ring 24 is realized.
In order to solve the technical problem that fly ash is easily adsorbed on the surface of a catalyst to block micropores of the catalyst when contacting the catalyst, so that the activity of the catalyst is reduced and the service life of the catalyst is affected, please refer to fig. 7-8, this embodiment provides the following technical solutions:
the first reaction device 26 comprises a first honeycomb catalytic plate 261, a second honeycomb catalytic plate 262 and a fixed guide sleeve 263, wherein symmetrical guide sliding strips 264 are arranged on the outer wall of the fixed guide sleeve 263, a guide groove for the guide sliding strips 264 to move is formed in the inner wall of the denitration tower 21, the inner wall of the fixed guide sleeve 263 is fixedly connected with the first honeycomb catalytic plate 261 and the second honeycomb catalytic plate 262 respectively, the upper surfaces of the guide sliding strips 264 are fixedly connected with the toothed ring 24 through supporting rods 28 respectively, the second reaction device 27 comprises a catalytic plate body 271 and a metal steel mesh 272, the metal steel mesh 272 is fixedly connected with the inner wall of the denitration tower 21, and the catalytic plate body 271 is fixedly connected with the metal steel mesh 272;
31 inner walls of desulfurizing tower are provided with respectively and spray layer 311 and defroster 312, spray layer 311 comprises spray header and shower head body, spray layer 311 sets up to three groups and parallel arrangement respectively, and spray header runs through 31 one side of desulfurizing tower respectively and is linked together through pipeline and external water source, and defroster 312 sets up in spraying layer 311 upper end, and 31 upper surfaces of desulfurizing tower are provided with the opening with 32 looks adaptations of desulfurizing pipeline, and desulfurizing pipeline 32 is linked together with the exhaust fume tower.
Specifically, the flue gas is catalyzed by the first honeycomb catalytic plate 261 and the second honeycomb catalytic plate 262, and meanwhile, when the flue gas is abraded by flue gas ash, the performance of the catalyst is not affected, the first honeycomb catalytic plate 261 and the second honeycomb catalytic plate 262 are vibrated by the up-and-down movement of the fixed guide sleeve 263, so that the situation that the fly ash is adsorbed on the surface of the catalyst to block catalyst micropores when contacting with the catalyst and the activity of the catalyst is reduced is avoided, the catalyst plate body 271 is matched with a metal steel mesh 272 serving as a base material, and has a flexible structure, when the flue gas flows through the catalyst plate body 271, the catalyst single plate continuously vibrates in the flue gas, so that the fly ash is difficult to be attached to the surface of the catalyst, and the advantages of the two catalysts are fully used;
the multilayer sprays layer 311 and the flue gas reverse contact sprays, the full reaction desulfurization, and the clean flue gas after the desulfurization is discharged to the exhaust tower after removing steam through demister 312, can effectively get rid of the SO in the flue gas 2 、NO x And the particles meet the smoke emission standard and have good operation flexibility.
In order to better show the operation flow of the wet desulfurization and denitration operation device for the regenerated flue gas in the cement kiln tail, the embodiment provides an operation method of the wet desulfurization and denitration operation device for the regenerated flue gas in the cement kiln tail, which comprises the following steps:
the method comprises the following steps: flue gas in the cement kiln tail enters a dust collection box 12 through a kiln tail bag connecting pipe 11, large particle dust and impurities in the flue gas are preliminarily filtered, working pressure is relieved for subsequent denitration and desulfurization, and the first reaction device 26 is prevented from being blocked by the large particle dust and the impurities;
step two: the filtered flue gas is added into a flue gas discharge pipe 13 through a flue gas discharge fan 16, and the flue gas is conveyed to a first reaction device 26 and a second reaction device 27 in sequence by matching with a guide roller 251 to react for denitration, so that the advantages of two catalysts in the first reaction device 26 and the second reaction device 27 are fully used;
step three: the flue gas after denitration enters the desulfurizing tower 31 through the denitration pipeline 22, the spraying layer 311 is in reverse contact with the flue gas for spraying, full reaction and desulfurization are carried out, the purified flue gas after denitration is discharged to the smoke discharging tower after water vapor is removed, and SO in the flue gas can be effectively removed 2 、NO x And the particles meet the smoke emission standard and have good operation flexibility.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a regeneration flue gas wet-type SOx/NOx control running gear in cement kiln tail, includes kiln tail flue gas dust removal mechanism (1), flue gas denitration mechanism (2) and wet desulfurization mechanism (3), its characterized in that: kiln tail flue gas dust removal mechanism (1) is including kiln tail bag connecting pipe (11), dust collection box (12) and exhaust pipe (13), dust collection box (12) one side and kiln tail bag connecting pipe (11) fixed connection, observation window (14) have been seted up on dust collection box (12) surface, observation window (14) one side is opened and shut through hinge and dust collection box (12) and is connected, dust collection box (12) upper surface and exhaust pipe (13) fixed connection, flue gas denitration mechanism (2) are including denitration tower (21) and denitration pipeline (22), denitration tower (21) upper surface and exhaust pipe (13) one end fixed connection, denitration tower (21) one side and denitration pipeline (22) fixed connection, wet-type desulfurization mechanism (3) are including desulfurizing tower (31) and desulfurization pipeline (32), desulfurizing tower (31) one side and denitration pipeline (22) one end fixed connection, desulfurizing tower (31) upper surface and desulfurization pipeline (32) fixed connection.
2. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 1, characterized in that: the upper end of the dust collection box (12) is provided with a smoke outlet (15) matched with the smoke exhaust pipe (13), the inner wall of the dust collection box (12) is provided with a smoke exhaust fan (16) and a dust filtering funnel (17) respectively, the smoke exhaust fan (16) is arranged above the dust filtering funnel (17), the lower surface of the dust filtering funnel (17) is fixedly connected with a first motor (18) through bolts, the lower surface of the first motor (18) is fixedly connected with the lower surface of the inner wall of the dust collection box (12) through bolts, and dust filtering holes which are uniformly distributed are formed in the surface of the dust filtering funnel (17) respectively.
3. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 2, characterized in that: the inner wall of the dust filtering funnel (17) is provided with a dust filtering brush strip (19), the dust filtering brush strip (19) is arranged to be an inclined column matched with the inner wall of the dust filtering funnel (17), a brush head is arranged on one side close to the inner wall of the dust filtering funnel (17), the brush head is in contact with the inner wall of the dust filtering funnel (17), the lower surface of the dust filtering brush strip (19) is fixedly connected with one end of an eccentric plate (191) through a bolt, and the other end of the eccentric plate (191) is fixedly connected with a motor shaft of a first motor (18) through a bolt.
4. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 1, characterized in that: dust prevention box (23) are installed respectively to denitration tower (21) upper surface both sides, dust prevention box (23) inner wall is provided with the spout with ring gear (24) looks adaptation, ring gear (24) and dust prevention box (23) sliding connection, denitration tower (21) are provided with the movable groove with ring gear (24) looks adaptation, install flue gas guider (25) in denitration tower (21) respectively, first reaction unit (26) and second reaction unit (27), second reaction unit (27) set up in first reaction unit (26) below and with denitration tower (21) inner wall zonulae occludens, second reaction unit (27) below one side is provided with the opening that is linked together with denitration pipeline (22).
5. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 4, characterized in that: flue gas guider (25) are including guide roll (251), backing roll (252) and second motor (253), guide roll (251) symmetry respectively sets up in backing roll (252) both sides, guide roll (251) surface is provided with evenly distributed's flabellum (256), backing roll (252) one end is passed through the bearing and is connected with dust-proof box (23) inner wall rotation, the motor shaft fixed connection of backing roll (252) other end and second motor (253), second motor (253) and dust-proof box (23) inner wall fixed connection, the cover has drive plate (254) on backing roll (252), drive plate (254) surface is provided with gear portion (255), ring gear (24) inner wall is provided with internal gear groove (241), gear portion (255) and internal gear groove (241) meshing.
6. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 5, characterized in that: the gear part (255) is arranged on one side of the transmission disc (254), the inner gear grooves (241) are arranged on the inner side of the gear ring (24) in a centrosymmetric mode, the gear part (255) is provided with teeth which are evenly distributed, and the inner gear grooves (241) are provided with tooth grooves corresponding to the teeth.
7. The wet desulfurization and denitrification operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 4, characterized in that: the first reaction device (26) comprises a first honeycomb catalytic plate (261), a second honeycomb catalytic plate (262) and a fixed guide sleeve (263), the outer wall of the fixed guide sleeve (263) is provided with symmetrical guide sliding strips (264), the inner wall of the denitration tower (21) is provided with a guide groove for the guide sliding strips (264) to move, the inner wall of the fixed guide sleeve (263) is fixedly connected with the first honeycomb catalytic plate (261) and the second honeycomb catalytic plate (262) respectively, and the upper surface of the guide sliding strips (264) is fixedly connected with the toothed ring (24) through supporting rods (28) respectively.
8. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 4, characterized in that: the second reaction device (27) comprises a catalytic plate body (271) and a metal steel mesh (272), the metal steel mesh (272) is fixedly connected with the inner wall of the denitration tower (21), and the catalytic plate body (271) is fixedly connected with the metal steel mesh (272).
9. The wet desulfurization and denitration operation device for the regenerated flue gas in the tail of the cement kiln as claimed in claim 1, characterized in that: desulfurizing tower (31) inner wall is provided with respectively sprays layer (311) and defroster (312), it comprises spray header and shower head body to spray layer (311), it sets up to three groups and parallel arrangement respectively to spray layer (311), spray header runs through desulfurizing tower (31) one side respectively and is linked together through pipeline and external water source, defroster (312) set up and is spraying layer (311) upper end, desulfurizing tower (31) upper surface be provided with the opening of desulfurization pipeline (32) looks adaptation, desulfurization pipeline (32) are linked together with the exhaust fume column.
10. An operation method of the regeneration flue gas wet desulfurization and denitration operation device in the cement kiln tail according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
the method comprises the following steps: flue gas in the cement kiln tail enters a dust collection box (12) through a kiln tail bag connecting pipe (11), and large-particle dust and impurities in the flue gas are preliminarily filtered;
step two: the filtered flue gas is added into a flue gas exhaust pipe (13) through a flue gas exhaust fan (16), and is conveyed to a first reaction device (26) and a second reaction device (27) in sequence to react by matching with a guide roller (251), so that denitration is performed;
step three: flue gas after denitration gets into in desulfurizing tower (31) through denitration pipeline (22), sprays layer (311) and flue gas reverse contact and sprays, and the desulfurization is fully reacted to clean flue gas after the desulfurization removes the steam and then discharges to the exhaust fume column.
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| CN202211061987.9A CN115318030A (en) | 2022-09-01 | 2022-09-01 | Wet-type desulfurization and denitrification operation device and method for regenerated flue gas in cement kiln tail |
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