CN110152485A - A kind of cement kiln fume high-temperature denitration dust collecting device - Google Patents
A kind of cement kiln fume high-temperature denitration dust collecting device Download PDFInfo
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- CN110152485A CN110152485A CN201910437647.3A CN201910437647A CN110152485A CN 110152485 A CN110152485 A CN 110152485A CN 201910437647 A CN201910437647 A CN 201910437647A CN 110152485 A CN110152485 A CN 110152485A
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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
- B01D46/0002—Casings; Housings; Frame constructions
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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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
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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
- B01D46/2411—Filter cartridges
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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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
- B01D46/60—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel arranged concentrically or coaxially
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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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/14—Mixing gases with gases with moving mixing elements, e.g. with liquid seal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
- B01F33/8212—Combinations of dissimilar mixers with consecutive receptacles with moving and non-moving stirring devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- 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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a kind of cement kiln fume high-temperature denitration dust collecting devices, including reactor cabinet and ammonia-gas spraying device, the inside of reactor cabinet is divided into left box body and right case, right case is internally provided with denitrating catalyst, outlet pipe is connected on the right case below denitrating catalyst, left box body is internally provided with filtering frame body, filters and is equipped with several ceramic fibre chimney filters on frame body, the bottom of left box body is provided with ash bucket；Ammonia-gas spraying device includes gas collecting tube, the both ends of gas collecting tube pass through admission line respectively and are connected to the left box body of reactor cabinet, socket is provided with shell on gas collecting tube, mixed flow cage body structure is rotatably connected on gas collecting tube inside housings, the wherein side of hull outside is provided with smoke nozzle, and the other side of hull outside is provided with spray ammonia pipe；The present invention reaches 90% or more to the dust removal efficiency and denitrification rate of flue gas, greatly reduces the pollution to atmospheric environment, and energy conservation and environmental protection, overall operation efficiency is high, is suitble to promote and apply in cement production enterprise.
Description
Technical field
The present invention relates to a kind of cement kiln fume high-temperature denitration dust collecting devices, belong to cement kiln fume treatment technology neck
Domain.
Background technique
Manufacture of cement mainly uses new dry cement production technology at present, discharges and contains higher nitrogen oxidation in flue gas
The pollutants such as object, particulate matter, alkali metal and heavy metal, and the SNCR skill that cement industry flue gas end-o f-pipe -control is commonly used
Art, the flue gas discharged after this technical treatment can no longer meet the increasingly strict environmental requirement of cement industry, therefore, denitration effect
The higher SCR technology of rate is increasingly used in cement industry；Cement kiln flue gas temperature after preheater is generally 350
DEG C or so, belong to the NO_x Reduction by Effective temperature window of traditional SCR catalyst, SCR catalyst, that is, denitrating catalyst, but cement kiln cigarette
There are the pollutants such as high concentrate dust, heavy metal and alkali metal in gas, and existing denitration dust collecting device is to the high concentration in flue gas
The effect when pollutants such as dust, heavy metal and alkali metal are dusted filtering is simultaneously bad, causes pollutant to have omission, and loses
These pollutants of leakage easily cause the blocking, abrasion and poisoning of SCR catalyst, the serious denitration effect for damaging SCR catalyst
Rate and service life；Simultaneously as there are pollutants such as high concentrate dust, heavy metal and alkali metal in cement kiln flue gas, because
This, flue gas and ammonia cannot be sufficiently mixed in smoke pipeline merely, to further affect subsequent SCR catalyst to flue gas
Denitration effect.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of cement kiln fume high-temperature denitration dust collecting device, makes water
Stall furnace high-temperature flue gas can be sufficiently mixed with ammonia, while the present invention is fine using several ceramics of solid array setting
Dimension chimney filter is dusted filtering to the gaseous mixture formed after flue gas and ammonia mixing, effectively filters particulate matter and alkali gold in flue gas
The pollutants such as category, prevent pollutant from omitting, to substantially reduce the blocking of SCR catalyst, abrasion and poisoning, extend SCR catalysis
Agent service life, SCR catalyst can effectively remove the nitrogen oxides in flue gas, and the present invention is equal to the dust removal efficiency and denitrification rate of flue gas
Reach 90% or more, greatly reduce the pollution to atmospheric environment, energy conservation and environmental protection, overall operation efficiency is high, is suitble to look forward in manufacture of cement
It is promoted and applied in industry.
The technical scheme adopted by the invention is as follows:
A kind of cement kiln fume high-temperature denitration dust collecting device, including reactor cabinet and ammonia-gas spraying device, the reactor cabinet
Inside be divided into left box body and right case, and the top of left box body and right case is interconnected, setting inside the right case
There is denitrating catalyst, outlet pipe is connected on the right case below denitrating catalyst, the left box body was internally provided with
Filter stand body is equipped with several ceramic fibre chimney filters on the filtering frame body, is arranged inside the left box body above filtering frame body
There is impulse ash blower, the input terminal of the impulse ash blower is connected to external compression air pipeline, the impulse soot blowing dress
It sets and is formed with several injection tubes corresponding with several ceramic fibre chimney filters, the bottom of left box body is provided with ash bucket, ash
Ash-valve is provided at the outlet at bottom of bucket；The ammonia-gas spraying device includes gas collecting tube, the both ends of the gas collecting tube respectively by into
Feed channel is connected to the left box body of reactor cabinet, and the left box body connectivity part of admission line and reactor cabinet is located at filtering frame
Between body and ash bucket, socket is provided with shell on the gas collecting tube, and mixed flow cage is rotatably connected on gas collecting tube inside housings
Body structure is formed with several gas collection holes, the wherein side of the hull outside on the gas collecting tube of mixed flow cage body inside configuration
It is provided with smoke nozzle, the other side of the hull outside is provided with spray ammonia pipe, and the smoke nozzle and spray ammonia pipe are respectively parallel to
Horizontal plane, and smoke nozzle and spray ammonia pipe, not in same level, the smoke nozzle passes through in several aerosol spraying branch pipes and shell
Portion's connection, the spray ammonia pipe are connected to by several spray ammonia branch pipes with enclosure interior, and the bottom of the shell is provided with dirt bucket, dirt
Ash-valve is provided at the outlet at bottom of bucket.
As present invention further optimization, face is not set the left box body connectivity part of two admission lines and reactor cabinet
It sets, the gaseous mixture of flue gas and ammonia flows into inside left box body through two admission lines, and the dynamic gaseous mixture of two plumes is having just enter into a left side
Being independent of each other in a flash when box house, the dynamic gaseous mixture of two plumes finally cross inside left box body；In the air inlet
Axial flow blower, static mixer and guiding device are disposed with by gas flow direction on pipeline, on two admission lines
Two axial flow blowers synchronous working, two axial flow blowers synchronous working suction ammonia-gas spraying device enclosure interior flue gases and ammonia it is mixed
Gas is closed, static mixer carries out turbulent mixture again to the gaseous mixture of the flue gas and ammonia flowed in admission line, to guarantee
The mixed effect of flue gas and ammonia；The gaseous mixture of static mixer treated flue gas and ammonia is formed by guiding device water conservancy diversion
Linear flowing, finally flows into inside left box body；The guiding device is arranged in inside the admission line of admission line end, institute
Stating guiding device includes two transverse plates and two longitudinal plates, and described two transverse plates and two longitudinal plates are connected in groined type；
The gaseous mixture of flue gas and ammonia in admission line is separated in two transverse plates and two longitudinal plates of groined type connection, is convenient for
The gaseous mixture fast guiding of flue gas and ammonia is formed into linear flowing.
As present invention further optimization, the left box body of the admission line end and reactor cabinet, which tilts, to be connected
It connects, the airintake direction of admission line end tilts upward；Due to the left box body connectivity part of two admission lines and reactor cabinet
Face is not arranged, and therefore, the gaseous mixture of flue gas and ammonia is tilted upward through two admission lines to be flowed into inside left box body, and two strands are inclined
The gaseous mixture flowed obliquely crosses in left box body internal helicoid, and upward helical flow, the air-flow and mistake of upward helical flow
Several ceramic fibre chimney filters contact installed on filter stand body, and gaseous mixture is in the gap between several ceramic fibre chimney filters
Flow regime is kept, dust granule is not easy to accumulate on ceramic fibre chimney filter surface, effectively improves the filtering effect of ceramic fibre chimney filter
Rate guarantees the filter effect of ceramic fibre chimney filter.
As present invention further optimization, the smoke nozzle is located at the hull outside of oblique upper on the left of gas collecting tube, institute
The spray ammonia pipe stated is located at the hull outside of obliquely downward on the right side of gas collecting tube, makes smoke nozzle and sprays the flue gas that ammonia pipe is sprayed into enclosure interior
It is located above and below gas collecting tube with ammonia；Solenoid valve is respectively arranged on the aerosol spraying branch pipe and spray ammonia branch pipe；
Using the switch of PLC controller control section solenoid valve, to adjust the workload intensity of ammonia-gas spraying device；It can also utilize
PLC controller controls the alternating of the solenoid valve on several aerosol spraying branch pipes, rotation switch, or controls the electricity on several spray ammonia branch pipes
Magnet valve alternating, rotation switch, or control aerosol spraying branch pipe is replaced with the solenoid valve timed delivery sprayed on ammonia branch pipe, rotation switch, to change
Become flue gas and ammonia enters the mode of enclosure interior.
As present invention further optimization, the mixed flow cage body structure includes two parallel end plates, two end plates
It is rotatablely connected respectively by bearing and gas collecting tube, is connected with several blades between two end plates, several blade uniform rings
Around circumferencial direction one week of end plate；When flue gas sprays into enclosure interior simultaneously through spray ammonia pipe through smoke nozzle, ammonia, gas flowing is driven
The mixed flow cage body structure that end plate and blade are constituted is rotated along gas collecting tube circumferencial direction, and the rotation of mixed flow cage body structure makes flue gas and ammonia
It flows and mixes along shell inner circle circumferential direction inside housings, during flue gas and ammonia mixed flow, when flue gas and ammonia
When the dirt bucket position that flow of air is arranged to housing bottom, since spatial volume becomes larger, flue gas and ammonia flowing pressure reduce, flue gas
In heavier particulate matter sink, fall into dirt bucket, the preliminary depositing dust of flue gas handled to realize, improves subsequent ceramics indirectly
Fiber chimney filter filter efficiency.
As present invention further optimization, the end plate and blade are aluminum alloy materials, blade with a thickness of 2-
3mm, the blade include straight flange portion and bevel edge portion, and the straight flange portion both ends of blade are fixedly connected with two end plates respectively, blade
Straight flange portion and 135 degree of longitudinal axis angle of end plate, the bevel edge portion of blade and 135 degree of the straight flange portion angle of blade；Aluminium alloy
End plate and leaf quality made of material are lighter, convenient for the mixed flow cage body structure of end plate and blade composition along gas collecting tube circumferencial direction
Rotation；The straight flange portion and bevel edge portion of blade shunt the flue gas for entering enclosure interior or ammonia, the flowing of reducing smoke or ammonia
Speed changes the flow direction of flue gas or ammonia, facilitates access for flue gas and the ammonia mixing of enclosure interior.
As present invention further optimization, the right case above denitrating catalyst is internally provided with rake soot blower,
Right case above rake soot blower is internally provided with reserved catalyst bed, with denitrating catalyst and reserved catalyst bed
It is provided with maintenance opening on corresponding right case, is sealedly connected with safeguard cover plate in maintenance opening；Rake soot blower for pair
Denitrating catalyst carries out soot blowing processing, prevents dust accretions and blocks denitrating catalyst；Reserved catalyst bed is for installing the
Two denitrating catalysts install spare denitrating catalyst under emergency conditions；Maintenance opening is convenient for denitrating catalyst progress
Maintenance and replacement.
As present invention further optimization, the denitrating catalyst is plate-type denitration catalyst, board-like denitration catalyst
The aperture of agent is 7mm；Plate-type denitration catalyst is plane or spherical towards the surface in gas direction is come；Aperture is the board-like of 7mm
Denitrating catalyst can effectively remove the nitrogen oxides in flue gas, and plate-type denitration catalyst is spherical towards the surface for coming gas direction
Face can effectively increase the contact surface of plate-type denitration catalyst and flue gas, improve the denitrification rate to flue gas.
As present invention further optimization, electric block is installed in the right case outside top of reactor cabinet；?
When needing to safeguard replacement denitrating catalyst or ceramic fibre chimney filter, electric block is for lifting denitrating catalyst or ceramic fibre filter
Pipe；Vibrator is installed on the outer side surface of ash bucket, convenient for the quick discharge of dust particles.
As present invention further optimization, the filtering frame body is hollow taper structure, hollow cone knot
The outer circumference surface that structure filters frame body is continuous annular table hierarchic structure, is installed on the step surface of each annular table hierarchic structure
There are several ceramic fibre chimney filters, several ceramic fibre chimney filters installed on the step surface of each annular table hierarchic structure are in week
To being evenly arranged；Filtering frame body is hollow taper structure, and the outer circumference surface of hollow cone structured filter frame body is continuous
Annular table hierarchic structure, several ceramic fibre chimney filters are installed on the step surface of each annular table hierarchic structure, thus
So that several ceramic fibre chimney filters is formed a kind of three-dimensional array column arrangement, effectively increases whole filtering surface；Moreover, ceramic fibre
Chimney filter is the arrangement of staged, alternating expression between each other, keeps the ambient gas mobility of each ceramic fibre chimney filter more preferable, has
Effect improves the filter efficiency of ceramic fibre chimney filter；Meanwhile when impulse ash blower carries out soot blowing processing to ceramic fibre chimney filter,
The dust to fall off from ceramic fibre chimney filter surface can also hurtle down.
The beneficial effects of the present invention are: flue gas is dusted filtering before add ammonia-gas spraying device, ammonia-gas spraying device is not
Only cement kiln high-temperature flue gas can be made to be sufficiently mixed with ammonia, and ammonia-gas spraying device also has certain buffering to flue gas
Depositing dust effect；It is hollow taper structure, the outer circumference surface of hollow cone structured filter frame body that frame body is filtered in the present invention
For continuous annular table hierarchic structure, the filter of several ceramic fibres is installed on the step surface of each annular table hierarchic structure
Pipe effectively increases whole filtering surface so that several ceramic fibre chimney filters be made to form a kind of three-dimensional array column arrangement；Moreover,
Ceramic fibre chimney filter is the arrangement of staged, alternating expression between each other, flows the ambient gas of each ceramic fibre chimney filter
Property is more preferable, effectively improves the filter efficiency of ceramic fibre chimney filter；Meanwhile when impulse ash blower blows ceramic fibre chimney filter
When ash processing, the dust to fall off from ceramic fibre chimney filter surface can also hurtle down；It is arranged to realize using solid array
Several ceramic fibre chimney filters filtering is dusted to the gaseous mixture that is formed after flue gas and ammonia mixing, effectively in filtering flue gas
Particulate matter and the pollutants such as alkali metal, prevent pollutant from omitting, thus substantially reduce the blocking of SCR catalyst, abrasion and in
Poison extends SCR catalyst service life, and SCR catalyst can effectively remove the nitrogen oxides in flue gas, and the present invention removes flue gas
Dirt rate and denitrification rate reach 90% or more, greatly reduce the pollution to atmospheric environment, and energy conservation and environmental protection, overall operation efficiency is high, fits
Conjunction promotes and applies in cement production enterprise.
Detailed description of the invention；
Fig. 1 is schematic structural view of the invention；
Fig. 2 is ammonia-gas spraying device overlooking structure diagram of the present invention；
Fig. 3 is ammonia-gas spraying device the schematic diagram of the section structure of the present invention；
Fig. 4 is ammonia-gas spraying device part of the present invention enlarged structure schematic diagram；
Fig. 5 is blade construction schematic diagram of the present invention；
Fig. 6 is guiding device structural schematic diagram of the present invention；
Fig. 7 is the left box body connection schematic diagram of admission line of the present invention and reactor cabinet；
Fig. 8 is present invention filtering frame body structural schematic diagram；
Main appended drawing reference meaning is as follows in figure:
1- ammonia-gas spraying device, 2- admission line, 3- filtering frame body, 4- ceramic fibre chimney filter, 5- impulse ash blower, 51- injection tube,
6- reactor cabinet, 7- rake soot blower, 8- denitrating catalyst, 9- ash bucket, 10- outlet pipe, 11- smoke nozzle, 12- spray ammonia
Pipe, 13- aerosol spraying branch pipe, 14- spray ammonia branch pipe, 15- solenoid valve, 16- mixed flow cage body structure, 161- end plate, 162- blade, 1621-
Straight flange portion, 1622- bevel edge portion, 17- gas collecting tube, 18- gas collection hole, 19- bearing, 20- axial flow blower, 21- static mixer, 22-
Guiding device, 221- transverse plate, 222- longitudinal plate, 23- dirt bucket, 24- shell, 25- reserve catalyst bed, 26- electric block,
27- vibrator, 28- ash-valve.
Specific embodiment；
Specific introduction is done to the present invention with reference to the accompanying drawings and examples.
As shown in Figs. 1-3: the present embodiment is a kind of cement kiln fume high-temperature denitration dust collecting device, including reactor cabinet
6 and ammonia-gas spraying device 1, the inside of reactor cabinet 6 is divided into left box body and right case, and the top of left box body and right case is mutual
Connection, right case are internally provided with denitrating catalyst 8, are connected with outlet pipe 10 on the right case below denitrating catalyst 8,
Left box body is internally provided with filtering frame body 3, filters and is equipped with several ceramic fibre chimney filters 4 on frame body 3, on filtering frame body 3
The left box body of side is internally provided with impulse ash blower 5, and the input terminal and external compression air pipeline of impulse ash blower 5 connect
It is logical, several injection tubes 51 corresponding with several ceramic fibre chimney filters 4 are formed on impulse ash blower 5, in left box body
Bottom is provided with ash bucket 9, and ash-valve 28 is provided at the outlet at bottom of ash bucket 9；Ammonia-gas spraying device 1 includes gas collecting tube 17, gas collecting tube
17 both ends pass through admission line 2 respectively and are connected to the left box body of reactor cabinet 6, and admission line 2 and reactor cabinet 6
Left box body connectivity part is located between filtering frame body 3 and ash bucket 9, and socket is provided with shell 24 on gas collecting tube 17, inside shell 24
Gas collecting tube 17 on be rotatably connected to mixed flow cage body structure 16, if being formed on the gas collecting tube 17 inside mixed flow cage body structure 16
A gas collection hole 18 is done, the wherein side outside shell 24 is provided with smoke nozzle 11, and the other side outside shell 24 is provided with spray
Ammonia pipe 12, smoke nozzle 11 and spray ammonia pipe 12 are respectively parallel to horizontal plane, and smoke nozzle 11 and spray ammonia pipe 12 be not in same level
On, for smoke nozzle 11 by being connected to inside several aerosol spraying branch pipes 13 and shell 24, spray ammonia pipe 12 sprays ammonia branch pipe 14 by several
It is connected to inside shell 24, the bottom of shell 24 is provided with dirt bucket 23, and ash-valve 28 is provided at the outlet at bottom of dirt bucket 23.
As shown in Fig. 2, in the present embodiment, face is not set the left box body connectivity part of two admission lines 2 and reactor cabinet 6
It sets, the gaseous mixture of flue gas and ammonia flows into inside left box body through two admission lines 2, and the dynamic gaseous mixture of two plumes is having just enter into a left side
Being independent of each other in a flash when box house, the dynamic gaseous mixture of two plumes finally cross inside left box body；On admission line 2
Axial flow blower 20, static mixer 21 and guiding device 22 are disposed with by gas flow direction, on two admission lines 2
Two axial flow blowers 20 synchronous working, two axial flow blowers 20 synchronous working suction 1 shell of ammonia-gas spraying device, 24 inside smokes and
The gaseous mixture of ammonia, static mixer 21 carry out Turbulence Mixed again to the gaseous mixture of the flue gas and ammonia flowed in admission line 2
It closes, to guarantee the mixed effect of flue gas and ammonia；The gaseous mixture of treated the flue gas of static mixer 21 and ammonia is by leading
It flows 22 water conservancy diversion of device and forms linear flowing, finally flow into inside left box body；In the present embodiment, guiding device 22 is arranged in air inlet
Inside the admission line 2 of 2 end of pipeline, guiding device 22 includes two transverse plates 221 and two longitudinal plates 222, such as Fig. 6 institute
Show, two transverse plates 221 are connected with two longitudinal plates 222 in groined type；In two transverse plates 221 of groined type connection and two
Longitudinal plate 222 separates the gaseous mixture of flue gas and ammonia in admission line 2, convenient for quickly leading the gaseous mixture of flue gas and ammonia
Manifold be in line shape flowing.
In practical application, as shown in fig. 7, the left box body of 2 end of admission line and reactor cabinet 6 tilts connects, into
The airintake direction of 2 end of feed channel tilts upward；Not due to the left box body connectivity part of two admission lines 2 and reactor cabinet 6
Face setting, therefore, the gaseous mixture of flue gas and ammonia is tilted upward through two admission lines 2 to be flowed into inside left box body, and two strands are inclined
The gaseous mixture flowed obliquely crosses in left box body internal helicoid, and upward helical flow, the air-flow and mistake of upward helical flow
Several ceramic fibre chimney filters 4 contact installed on filter stand body 3, and sky of the gaseous mixture between several ceramic fibre chimney filters 4
Flow regime is kept in gap, dust granule is not easy to accumulate on 4 surface of ceramic fibre chimney filter, effectively improves ceramic fibre chimney filter 4
Filter efficiency guarantees the filter effect of ceramic fibre chimney filter 4.
As shown in Figure 1-3, smoke nozzle 11 is located at outside the shell 24 of 17 left side oblique upper of gas collecting tube in the present embodiment, spray
Ammonia pipe 12 is located at outside the shell 24 of 17 right side obliquely downward of gas collecting tube, makes smoke nozzle 11 and spray ammonia pipe 12 to spraying into inside shell 24
Flue gas and ammonia be located above and below gas collecting tube 17；Electricity is respectively arranged on aerosol spraying branch pipe 13 and spray ammonia branch pipe 14
Magnet valve 15；Using the switch of PLC controller control section solenoid valve 15, to adjust the workload intensity of ammonia-gas spraying device 1；Also
It can use PLC controller and control the alternating of solenoid valve 15 on several aerosol spraying branch pipes 13, rotation switch, or control several sprays
The solenoid valve 15 in the alternating of solenoid valve 15, rotation switch, or control aerosol spraying branch pipe 13 and spray ammonia branch pipe 14 on ammonia branch pipe 14 is same
Step alternately, rotation switch, to change flue gas and ammonia enters mode inside shell 24.
As in Figure 2-4, in the present embodiment, mixed flow cage body structure 16 includes two parallel end plates 161, two end plates
161 are rotatablely connected by bearing 19 and gas collecting tube 17 respectively, several blades 162 are connected between two end plates 161, several
Circumferencial direction one week around end plate 161 of a 162 uniform ring of blade；Flue gas is sprayed into through smoke nozzle 11, ammonia through spraying ammonia pipe 12 simultaneously
When 24 inside of shell, the mixed flow cage body structure 16 that gas fluxion strap moved end plate 161 and blade 162 are constituted is along 17 circumference side of gas collecting tube
To rotation, the rotation of mixed flow cage body structure 16 makes flue gas and ammonia flow and mix along 24 inner circle circumferential direction of shell inside shell 24
It closes, during flue gas and ammonia mixed flow, when flue gas and ammonia flow to 23 position of dirt bucket of 24 bottom of shell setting
When, since spatial volume becomes larger, flue gas and ammonia flowing pressure reduce, and heavier particulate matter sinks in flue gas, fall into dirt bucket 23
In, the preliminary depositing dust of flue gas is handled to realize, improves subsequent 4 filter efficiency of ceramic fibre chimney filter indirectly.
End plate 161 and blade 162 in the present embodiment are aluminum alloy materials, blade 162 with a thickness of 2mm, actually answering
Used time, the thickness of blade 162 may be 2.5mm or 3mm, and as shown in Figures 4 and 5, the blade 162 in the present embodiment includes straight flange
1621 both ends of straight flange portion in portion 1621 and bevel edge portion 1622, blade 162 are fixedly connected with two end plates 161 respectively, blade 162
135 degree of longitudinal axis angle of straight flange portion 1621 and end plate 161, the i.e. angle A shown in Fig. 4；The bevel edge portion 1622 of blade 162 with
135 degree of 1621 angle of straight flange portion of blade 162, the i.e. angle B shown in Fig. 4；End plate 161 and blade made of aluminum alloy materials
162 lighter weights, the mixed flow cage body structure 16 constituted convenient for end plate 161 and blade 162 are rotated along 17 circumferencial direction of gas collecting tube；Leaf
The straight flange portion 1621 and bevel edge portion 1622 of piece 162 will enter the flue gas inside shell 24 or ammonia shunts, reducing smoke or ammonia
Flowing velocity, change the flow direction of flue gas or ammonia, facilitate access for flue gas and ammonia shell 24 inside and mix.
As shown in Figure 1, right case of the present embodiment above denitrating catalyst 8 is internally provided with rake soot blower 7, harrowing
The right case of 7 top of formula soot blower is internally provided with reserved catalyst bed 25, with denitrating catalyst 8 and reserved catalyst bed
It is provided with maintenance opening on 25 corresponding right cases, is sealedly connected with safeguard cover plate in maintenance opening；Rake soot blower 7 is used for
Soot blowing processing is carried out to denitrating catalyst 8, dust accretions is prevented and blocks denitrating catalyst 8；Reserved catalyst bed 25 is used for
Second denitrating catalyst is installed or spare denitrating catalyst is installed under emergency conditions；Maintenance opening is convenient for denitration catalyst
Agent 8 is safeguarded and is replaced；It is opened in practical application, maintenance also can be set on left box body corresponding with ceramic fibre chimney filter 4
Mouthful, it is tightly connected safeguard cover plate in maintenance opening, convenient for ceramic fibre chimney filter 4 is safeguarded and replaced.
Denitrating catalyst 8 in the present embodiment is plate-type denitration catalyst, and the aperture of plate-type denitration catalyst is 7mm；Plate
Formula denitrating catalyst is plane towards the surface for coming gas direction, and aperture is that the plate-type denitration catalyst of 7mm can effectively remove flue gas
In nitrogen oxides, in practical application, spherical also can be set into towards the surface for coming gas direction in plate-type denitration catalyst；
Plate-type denitration catalyst can effectively increase connecing for plate-type denitration catalyst and flue gas towards to come the surface in gas direction be spherical
Contacting surface improves the denitrification rate to flue gas.
As shown in Figure 1, the present embodiment is equipped with electric block 26 in the right case outside top of reactor cabinet 6；It is needing
When safeguarding replacement denitrating catalyst 8 or ceramic fibre chimney filter 4, electric block 26 is fine for lifting denitrating catalyst 8 or ceramics
Tie up chimney filter 4；Vibrator 27 is installed on the outer side surface of ash bucket 9, convenient for the quick discharge of dust particles.
As shown in figs. 1 and 8, the filtering frame body 3 in the present embodiment is hollow taper structure, hollow cone structure mistake
The outer circumference surface of filter stand body 3 is continuous annular table hierarchic structure, is equipped on the step surface of each annular table hierarchic structure
Several ceramic fibre chimney filters 4, several ceramic fibre chimney filters 4 installed on the step surface of each annular table hierarchic structure are in week
To being evenly arranged；Filtering frame body 3 is hollow taper structure, and the outer circumference surface of hollow cone structured filter frame body 3 is to connect
Continuous annular table hierarchic structure is equipped with several ceramic fibre chimney filters 4 on the step surface of each annular table hierarchic structure, from
And several ceramic fibre chimney filters 4 is made to form a kind of three-dimensional array column arrangement, effectively increase whole filtering surface；Moreover, ceramic
Fiber chimney filter 4 is the arrangement of staged, alternating expression between each other, makes the ambient gas mobility of each ceramic fibre chimney filter 4
More preferably, the filter efficiency of ceramic fibre chimney filter 4 is effectively improved；Meanwhile when impulse ash blower 5 carries out ceramic fibre chimney filter 4
When soot blowing processing, the dust to fall off from 4 surface of ceramic fibre chimney filter can also hurtle down.
The working principle of the present embodiment is as follows:
Cement kiln high-temperature flue gas passes through the shell 24 that several aerosol spraying branch pipes 13 on smoke nozzle 11 spray into ammonia-gas spraying device 1 first
Inside, ammonia are sprayed into inside the shell 24 of ammonia-gas spraying device 1 by several spray ammonia branch pipes 14 on spray ammonia pipe 12, spray into shell 24
The mixed flow cage body structure 16 that internal flue gas and ammonia drives end plate 161 and blade 162 to constitute turns along 17 circumferencial direction of gas collecting tube
Dynamic, the rotation of mixed flow cage body structure 16 makes flue gas and ammonia flow and mix along 24 inner circle circumferential direction of shell inside shell 24,
During flue gas and ammonia mixed flow, when flue gas and ammonia flow to dirt 23 position of bucket of 24 bottom of shell setting, by
Becoming larger in spatial volume, flue gas and ammonia flowing pressure reduce, and heavier particulate matter sinks in flue gas, it falls into dirt bucket 23, from
And it realizes and the preliminary depositing dust of flue gas is handled；It is same that two axial flow blowers 20 on two admission lines 2 are controlled by PLC controller
Walk work, the gaseous mixture of two axial flow blowers 20 synchronous working suction 1 shell of ammonia-gas spraying device 24 inside smokes and ammonia, shell 24
The gaseous mixture of inside smoke and ammonia flows into gas collecting tube 17 and admission line 2, static mixing through the gas collection hole 18 on gas collecting tube 17
Device 21 carries out turbulent mixture again to the gaseous mixture of the flue gas and ammonia flowed in admission line 2, to guarantee flue gas and ammonia
Mixed effect；The gaseous mixture of treated the flue gas of static mixer 21 and ammonia forms linear by 23 water conservancy diversion of guiding device
Flowing, finally flows into inside left box body；The gaseous mixture of flue gas and ammonia is after two admission lines 2 flow into left box body inside, and two
The dynamic gaseous mixture of plume crosses inside left box body, and flows up, if the air-flow flowed up and installing on filtering frame body 3
Dry ceramic fibre chimney filter 4 contacts, and gaseous mixture keeps flow regime in the gap between several ceramic fibre chimney filters 4,
The pollutants such as dust particles and alkali metal in flue gas are trapped within 4 surface of ceramic fibre chimney filter, through 4 mistake of ceramic fibre chimney filter
Mixed airflow after filter is to inside the right case of reactor cabinet 6, through the nitrogen oxidation in 8 catalytic elimination flue gas of denitrating catalyst
Object is finally discharged by outlet pipe 10；Wherein, the pressure difference inside left box body and right case reaches a certain level or preset value
When, started using PLC controller control impulse ash blower 5, reversed soot blowing processing is carried out to ceramic fibre chimney filter 4, makes to accumulate
Dust particles on 4 surface of ceramic fibre chimney filter fall off, and eventually fall into ash bucket 9, are discharged by ash-valve 28, in ash bucket 9
Outer side surface on vibrator 27 is installed, convenient for the quick discharge of dust particles；Meanwhile above denitrating catalyst 8
Rake soot blower 7 is set inside right case, periodically starts rake soot blower 7 and soot blowing processing is carried out to denitrating catalyst 8, prevent ash
Dirt is accumulated and blocks denitrating catalyst 88.
The present invention adds ammonia-gas spraying device before being dusted filtering to flue gas, and ammonia-gas spraying device can not only make cement kiln
High-temperature flue gas is sufficiently mixed with ammonia, and ammonia-gas spraying device also has certain buffering depositing dust effect to flue gas；The present invention
Middle filtering frame body is hollow taper structure, and the outer circumference surface of hollow cone structured filter frame body is continuous ring-shaped step
Formula structure is equipped with several ceramic fibre chimney filters on the step surface of each annular table hierarchic structure, to make several potteries
Porcelain fiber chimney filter forms a kind of three-dimensional array column arrangement, effectively increases whole filtering surface；Moreover, ceramic fibre chimney filter mutually it
Between be staged, alternating expression arrangement, keep the ambient gas mobility of each ceramic fibre chimney filter more preferable, effectively improve ceramics
The filter efficiency of fiber chimney filter；Meanwhile when impulse ash blower carries out soot blowing processing to ceramic fibre chimney filter, from ceramic fibre
The dust that chimney filter surface falls off can also hurtle down；To realize several ceramic fibre chimney filters being arranged using solid array
Filtering is dusted to the gaseous mixture formed after flue gas and ammonia mixing, it is dirty effectively to filter particulate matter and alkali metal in flue gas etc.
Object is contaminated, prevents pollutant from omitting, to substantially reduce the blocking of SCR catalyst, abrasion and poisoning, extends SCR catalyst and uses
Service life, SCR catalyst can effectively remove the nitrogen oxides in flue gas, and the present invention reaches the dust removal efficiency and denitrification rate of flue gas
90% or more, greatly reduce the pollution to atmospheric environment, energy conservation and environmental protection, overall operation efficiency is high, is suitble in cement production enterprise
It promotes and applies.
The above is only the preferred embodiment of the invention patent, it is noted that for the common skill of the art
For art personnel, under the premise of not departing from the invention patent principle, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the patent of the present invention.
Claims (10)
1. a kind of cement kiln fume high-temperature denitration dust collecting device, it is characterised in that: including reactor cabinet and ammonia-gas spraying device, institute
The inside for stating reactor cabinet is divided into left box body and right case, and the top of left box body and right case is interconnected, the right side
Box house is provided with denitrating catalyst, and outlet pipe, the left box body are connected on the right case below denitrating catalyst
It is internally provided with filtering frame body, several ceramic fibre chimney filters are installed on the filtering frame body, the left side above filtering frame body
Box house is provided with impulse ash blower, and the input terminal of the impulse ash blower is connected to external compression air pipeline, institute
It states and is formed with several injection tubes corresponding with several ceramic fibre chimney filters on impulse ash blower, set in the bottom of left box body
It is equipped with ash bucket, is provided with ash-valve at the outlet at bottom of ash bucket；The ammonia-gas spraying device includes gas collecting tube, the both ends of the gas collecting tube
It is connected to respectively by admission line with the left box body of reactor cabinet, and the left box body connectivity part of admission line and reactor cabinet
Between filtering frame body and ash bucket, socket is provided with shell on the gas collecting tube, the company of rotation on gas collecting tube inside housings
It is connected to mixed flow cage body structure, several gas collection holes, the hull outside are formed on the gas collecting tube of mixed flow cage body inside configuration
Wherein side be provided with smoke nozzle, the other side of the hull outside is provided with spray ammonia pipe, the smoke nozzle and spray ammonia pipe
It is respectively parallel to horizontal plane, and smoke nozzle and spray ammonia pipe, not in same level, the smoke nozzle passes through several aerosol spraying branch
Pipe is connected to enclosure interior, and the spray ammonia pipe is connected to by several spray ammonia branch pipes with enclosure interior, and the bottom of the shell is set
It is equipped with dirt bucket, is provided with ash-valve at the outlet at bottom of dirt bucket.
2. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that two air inlets
Face is not arranged the left box body connectivity part of pipeline and reactor cabinet, on the admission line successively by gas flow direction
It is provided with axial flow blower, static mixer and guiding device, two axial flow blowers synchronous working on two admission lines, institute
It states guiding device to be arranged in inside the admission line of admission line end, the guiding device includes that two transverse plates and two are vertical
To plate, described two transverse plates and two longitudinal plates are connected in groined type.
3. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 2, which is characterized in that it is described into
The left box body of feed channel end and reactor cabinet, which tilts, to be connected, and the airintake direction of admission line end tilts upward.
4. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that the spray
Smoke pipe is located at the hull outside of oblique upper on the left of gas collecting tube, and the spray ammonia pipe is located on the right side of gas collecting tube outside the shell of obliquely downward
Solenoid valve is respectively arranged on portion, the aerosol spraying branch pipe and spray ammonia branch pipe.
5. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that described is mixed
Stream cage body structure includes two parallel end plates, and two end plates pass through bearing respectively and gas collecting tube is rotatablely connected, in two end plates
Between be connected with several blades, circumferencial direction one week around end plate of several blade uniform rings.
6. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 5, which is characterized in that the end
Plate and blade are aluminum alloy materials, blade with a thickness of 2-3mm, the blade includes straight flange portion and bevel edge portion, blade it is straight
Edge both ends are fixedly connected with two end plates respectively, 135 degree of longitudinal axis angle of the straight flange portion of blade and end plate, blade it is oblique
135 degree of the straight flange portion angle of edge and blade.
7. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that urged in denitration
Right case above agent is internally provided with rake soot blower, and the right case above rake soot blower is internally provided with reserved urge
Agent bed is provided with maintenance opening on right case corresponding with denitrating catalyst and reserved catalyst bed, is open in maintenance
Place is sealedly connected with safeguard cover plate.
8. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1 or claim 7, which is characterized in that described
Denitrating catalyst be plate-type denitration catalyst, the aperture of plate-type denitration catalyst is 7mm；Plate-type denitration catalyst direction carrys out gas
The surface in direction is plane or spherical.
9. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that in reactor
The right case outside top of cabinet is equipped with electric block, is equipped with vibrator on the outer side surface of ash bucket.
10. a kind of cement kiln fume high-temperature denitration dust collecting device according to claim 1, which is characterized in that described
Filtering frame body is hollow taper structure, and the outer circumference surface of hollow cone structured filter frame body is continuous annular table stepwise
Structure is equipped with several ceramic fibre chimney filters, each annular table stepwise knot on the step surface of each annular table hierarchic structure
Several ceramic fibre chimney filters installed on the step surface of structure are in be arranged circumferentially.
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| CN201910437647.3A CN110152485B (en) | 2019-05-24 | 2019-05-24 | High-temperature denitration dust removal device for flue gas of cement kiln |
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| CN111249881A (en) * | 2020-02-25 | 2020-06-09 | 四川美富特环境治理有限责任公司 | Glass kiln flue gas treatment method and system |
| CN112138479A (en) * | 2020-09-30 | 2020-12-29 | 泰州市顺和机械制造有限公司 | Variable air duct dust remover convenient to maintain |
| CN113083012A (en) * | 2021-05-21 | 2021-07-09 | 唐山盛通锻造有限公司 | Forge and use energy-saving denitration purifier |
| CN113440938A (en) * | 2021-07-16 | 2021-09-28 | 扬州工业职业技术学院 | Dust removal and filtration device for cement kiln flue gas |
| CN113457439A (en) * | 2021-07-23 | 2021-10-01 | 凯盛晶华玻璃有限公司 | Integrated technology for dust removal, denitration and desulfurization by coupling fiber pipe and catalyst filtering system |
| CN113769581A (en) * | 2021-09-22 | 2021-12-10 | 南京澳博工业智能科技研究院有限公司 | Denitration system for improving removal rate of nitrogen oxides in flue gas of cement kiln |
| CN114432860A (en) * | 2021-12-14 | 2022-05-06 | 武汉龙净环保工程有限公司 | Synergistic removal method for sulfur, nitrate and dust in cement flue gas |
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| CN111249881A (en) * | 2020-02-25 | 2020-06-09 | 四川美富特环境治理有限责任公司 | Glass kiln flue gas treatment method and system |
| CN112138479A (en) * | 2020-09-30 | 2020-12-29 | 泰州市顺和机械制造有限公司 | Variable air duct dust remover convenient to maintain |
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| CN113457439A (en) * | 2021-07-23 | 2021-10-01 | 凯盛晶华玻璃有限公司 | Integrated technology for dust removal, denitration and desulfurization by coupling fiber pipe and catalyst filtering system |
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| CN113769581B (en) * | 2021-09-22 | 2024-06-07 | 南京澳博工业智能科技研究院有限公司 | Denitration system for improving removal rate of nitrogen oxides in cement kiln flue gas |
| CN114432860A (en) * | 2021-12-14 | 2022-05-06 | 武汉龙净环保工程有限公司 | Synergistic removal method for sulfur, nitrate and dust in cement flue gas |
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| CN110152485B (en) | 2020-04-28 |
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