CN109550341A - Alkali recovery furnace flue gas minimum discharge device and flue gas processing method - Google Patents
Alkali recovery furnace flue gas minimum discharge device and flue gas processing method Download PDFInfo
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- CN109550341A CN109550341A CN201811391824.0A CN201811391824A CN109550341A CN 109550341 A CN109550341 A CN 109550341A CN 201811391824 A CN201811391824 A CN 201811391824A CN 109550341 A CN109550341 A CN 109550341A
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- flue gas
- absorption tower
- spray
- precipitator
- wet electrical
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- 239000003546 flue gas Substances 0.000 title claims abstract description 247
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 239000003513 alkali Substances 0.000 title claims abstract description 33
- 238000011084 recovery Methods 0.000 title claims abstract description 31
- 238000003672 processing method Methods 0.000 title claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 86
- 239000000428 dust Substances 0.000 claims abstract description 77
- 238000010521 absorption reaction Methods 0.000 claims abstract description 72
- 239000012716 precipitator Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 26
- 239000007800 oxidant agent Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 44
- 230000000712 assembly Effects 0.000 claims description 27
- 238000000429 assembly Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 23
- 239000000498 cooling water Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000009827 uniform distribution Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 235000019504 cigarettes Nutrition 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- -1 flue gas Compound Chemical class 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to flue gas ash removal technical field more particularly to a kind of alkali recovery furnace flue gas minimum discharge devices and flue gas processing method.The present invention provides a kind of alkali recovery furnace flue gas minimum discharge devices, including alkali recovery furnace and electrostatic precipitator, wherein: further including flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator, alkali recovery furnace, electrostatic precipitator, flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator are sequentially connected, flue gas mixer includes reaction chamber and strong oxidizer is sprayed into the indoor spray gun of reaction, the both ends of reaction chamber are connected with electrostatic precipitator and desulphurization denitration absorption tower respectively, and spray gun is connected with reaction chamber.The application is by being successively dusted processing to flue gas to electrostatic precipitator, flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator, to remove the dust particles and NO and SO in flue gas2Content, and then avoid its exhaust emission atmosphere.
Description
Technical field
The present invention relates to flue gas ash removal technical field more particularly to a kind of alkali recovery furnace flue gas minimum discharge devices and flue gas
Processing method.
Background technique
As consciousness of the people for atmospheric environment protection is more and more stronger, the discharge of flue gas is also increasingly by people in industry
Attention.In general, containing SO in flue gas2, the pollutants such as NO.Therefore, in order to avoid pollute atmospheric environment, need to flue gas into
Row respective handling can just be discharged into atmosphere.
SCR denitration technology or SNCR denitration technology is mostly used to remove flue gas in smoke discharging device in existing market greatly
Middle nitrogen-containing oxide.
Since SCR denitration reaction temperature range is 300 DEG C -- 420 DEG C, reactor assemblies are larger, and smoke discharging device is empty
Between not for the region of SCR denitration component reaction, therefore be not easy to the installation of SCR denitration component, it is difficult to efficiently in removal flue gas
The pollutants such as NO.In addition, the denitration efficiency of SNCR technology is not high, it is difficult to the efficiently pollutants such as NO in removal flue gas, so that
After flue gas emission enters in atmosphere, atmospheric environment is polluted.
Summary of the invention
In order to solve can not effectively to remove the SO in flue gas in the related technology2, the pollutants such as NO the technical issues of, the present invention
Embodiment provides a kind of alkali recovery furnace flue gas minimum discharge device and flue gas processing method, and its object is to effectively remove flue gas
In dust, improve efficiency of dust collection.
In a first aspect, the present invention provides a kind of alkali recovery furnace flue gas minimum discharge device, including alkali recovery furnace and electrostatic
Deduster, in which: further include flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator, alkali recovery furnace, electrostatic precipitation
Device, flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator are sequentially connected, and flue gas mixer includes reaction chamber and will be strong
Oxidant, which sprays into, reacts indoor spray gun, and the both ends of reaction chamber are connected with electrostatic precipitator and desulphurization denitration absorption tower respectively, spray
Rifle is connected with reaction chamber.
The dust of former flue gas is reduced by the processing of electrostatic precipitator to remove a part of dust content in former flue gas
Concentration；By the setting to flue gas mixer, strong oxidizer is injected in reaction chamber by spray gun at will be through electrostatic precipitator
The NO in flue gas after reason is converted to high price NO soluble easily in waterX, in order to which rear road desulphurization denitration absorption tower is removed；Simultaneously
The desulfurizing agents such as weak white liquor or white clay are added in absorption tower and remove SO2, then by setting wet electrical dust precipitator, in order to further
A series of dust content of the removal in treated on desulphurization denitration absorption tower saturation wet flue gas, so that through treated cigarettes
Gas will not pollute after being discharged into atmosphere.
Optionally, spray gun includes spray head, the body of a gun and air accumulator, and spray gun is set in reaction chamber, the body of a gun and air accumulator setting
In outside reaction chamber, spray head and air accumulator are connected with the body of a gun respectively.
By the setting to spray gun, convenient for by spray gun to spraying into strong oxidizer in reaction chamber, in order to strong oxidizer with
Nitric oxide in flue gas reacts in reaction chamber；In addition, by the setting to the body of a gun and air accumulator, in order to spray head
Supply strong oxidizer can control when to spray into strong oxidizer into reaction chamber in addition, the body of a gun is set to outside reaction chamber, will
Low price NO not soluble in waterXIt is oxidized to be dissolved in the high price NO of waterX。
Optionally, desulphurization denitration absorption tower includes absorption tower ontology, airflow uniform distribution component, the first spray assemblies and demisting
Device, absorption tower ontology are connected with flue gas mixer and wet electrical dust precipitator, airflow uniform distribution component, the first spray assemblies and demister
It is set in turn in the ontology of absorption tower.
By the setting to airflow uniform distribution component, in order to which flue gas is uniformly distributed in the ontology of absorption tower, consequently facilitating
First spray assemblies spray will be dissolved in the high price NO of water in flue gasXSufficiently dissolution, and by demister removal because spray leads to height
The fog that warm flue gas atomization generates, to reduce the dust concentration in flue gas and be saturated flue gas in order to wet electrical dust precipitator pair
It is dusted processing.
Optionally, gas cooler, wet electrical dust precipitator and flue gas heater are connected between reaction chamber and desulphurization denitration tower
It is connected, first circulation pump is connected between gas cooler and flue gas heater.
The processing exhaust gas volumn on absorption tower is reduced in order to carry out cooling processing to flue gas by setting gas cooler, also
It can prevent the excessively high service life to influence desulphurization denitration absorption tower and wet electrical dust precipitator of flue-gas temperature；Again by through wet
Treated the flue gas heating of formula electric precipitator, in order to by the discharge of flue gas, in addition, flue gas is heated up, can to avoid flue gas with
The phenomenon that white cigarette is generated after hot air.
Optionally, wet electrical dust precipitator includes body of deduster, water conservancy diversion distribution component, the second spray assemblies, high-voltage rectifying
Transformer and the charged component of anode and cathode, water conservancy diversion distribution component, the second spray assemblies and the charged component of anode and cathode are set in turn in and remove
In dirt device ontology, high-voltage rectifying transformer is set in body of deduster and is connected with the charged component of anode and cathode.
By the setting to water conservancy diversion distribution component, the second spray assemblies, high-voltage rectifying transformer and the charged component of anode and cathode,
Flue gas can be first uniformly distributed, then it is sprayed, in order to sufficiently spray to flue gas, and pass through the charged component of anode and cathode for cigarette
Fine particulates in gas and the nitrate after being dissolved are separated from flue gas.
Second aspect, the present invention also provides a kind of flue gas processing methods, which is characterized in that is applied to a kind of above-mentioned alkali and returns
It receives in kiln gas minimum discharge device, flue gas processing method includes: that alkali recovery furnace collects former flue gas and is transported to electrostatic and removes
In dirt device；Electrostatic precipitator carries out the first dust removal process to former flue gas and forms the first flue gas, and the first flue gas is delivered to flue gas
In mixer；Flue gas mixer carries out oxidation processes to the first flue gas and forms the second flue gas, and the second flue gas is delivered to desulfurization
In denitration absorption tower；Desulphurization denitration absorption tower carries out the second dust removal process to the second flue gas and forms third flue gas, and by third cigarette
Gas inputs in wet electrical dust precipitator；Wet electrical dust precipitator carries out third dust removal process to third flue gas and forms the 4th flue gas, and will
The output of 4th flue gas.
Flue gas is first delivered in electrostatic precipitator by alkali recovery furnace, removes a large amount of powder in flue gas by electrostatic precipitator
Dust concentration in flue gas is reduced to 30~50mg/Nm by dirt3, then pass through flue gas mixer for the Low-Charged Nitrogen oxygen in flue gas
Compound is oxidized to higher nitrogen oxides, then absorbs the higher nitrogen oxides for being dissolved in water by desulphurization denitration absorption tower to remove cigarette
Nitrogen oxides in gas, while the desulfurizing agents such as weak white liquor or white clay are added in absorption tower and remove SO2, then pass through wet-esp
Device removes fine particulates in flue gas and further with solvent components, so that flue gas reaches discharge standard, to avoid
Pollute atmosphere.
Optionally, spray gun includes spray head, the body of a gun and air accumulator, and oxidation processes include: that air accumulator provides Strong oxdiative to the body of a gun
Agent；Strong oxidizer is supplied to spray head by the body of a gun；Spray head spurts into strong oxidizer in reaction chamber.
Strong oxidizer is sprayed into reaction chamber by spray gun, in order to which strong oxidizer and flue gas sufficiently reflect；By to spray
The setting of rifle, the body of a gun and air accumulator sprays strong oxidizer convenient for spray head.
Optionally, gas cooler, wet electrical dust precipitator and flue gas heater are connected between reaction chamber and desulphurization denitration tower
It is connected, first circulation pump, flue gas processing method further include: in gas cooler is connected between gas cooler and flue gas heater
Cooling water absorb the heat through flue gas mixer treated the second flue gas, cooling water temperature increases；First circulation pump will be warm
Cooling water after degree increases is extracted to flue gas heater；Flue gas heater is to through wet electrical dust precipitator treated the 4th flue gas
Carry out heating treatment, cooling water temperature decline；Cooling water after first circulation pump declines temperature is extracted to gas cooler.
It is pumped by first circulation and extracts cooling water to gas cooler or flue gas heater, in order to be followed to cooling water
Ring uses, to reduce energy consumption.
Optionally, desulphurization denitration absorption tower includes absorption tower ontology, airflow uniform distribution component, the first spray assemblies and demisting
Device, the second dust removal process include: absorption tower ontology for receiving through gas cooler cooling treated the second flue gas；Air-flow is equal
Cloth component will be input to intrinsic second flue gas in absorption tower and be uniformly distributed in the ontology of absorption tower；First spray assemblies are to uniform
The second flue gas spray desulfurizing agent of distribution is to dissolve the SO in the second flue gas2With high price NOXForm it into third flue gas and the first mist
Gas；Demister separates the first fog and third flue gas；Absorption tower ontology exports third flue gas into wet electrical dust precipitator.
By the way that the second flue gas to be evenly distributed in the ontology of absorption tower, then it is sprayed, thus the second spray assemblies
To flue gas uniform spraying, and the higher nitrogen oxides in the second flue gas are sufficiently dissolved, then will be because of spray generation by demister
Fog removal, to remove the large particulate matter in the nitrogen-containing oxide and dust in the second flue gas.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Invention.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of alkali recovery furnace flue gas minimum discharge device provided by the invention；
Fig. 2 is the flow chart of the flue gas processing method provided in one embodiment of the invention.
In figure: 10, alkali recovery furnace；20, electrostatic precipitator；21, heat exchanger；30, flue gas mixer；31, reaction chamber；32,
Spray gun；40, blower；50, gas cooler；51, the first cooling pipe；52, the second cooling pipe；53, first circulation pumps；60,
Desulphurization denitration absorption tower；61, absorption tower ontology；62, airflow uniform distribution component；63, the first spray assemblies；64, demister；65,
Two circulating pumps；66, first input end；67, the first output end；70, wet electrical dust precipitator；71, body of deduster；72, water conservancy diversion point
Cloth component；73, the second spray assemblies；74, high-voltage rectifying transformer；75, the charged component of anode and cathode；76, the second input terminal；77,
Second output terminal；80, flue gas heater；90, chimney.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
SCR denitration technology or SNCR denitration technology is mostly used to remove flue gas in smoke discharging device in existing market greatly
Middle nitrogen-containing oxide.Since SCR denitration reaction temperature range is 300 DEG C -- 420 DEG C, reactor assemblies are larger, and flue gas emission
Device space is not easy to the installation of SCR denitration component not for the region of SCR denitration component reaction, it is difficult to efficiently removal
The pollutants such as the NO in flue gas.In addition, the denitration efficiency of SNCR technology is not high, it is difficult to the efficiently pollution such as NO in removal flue gas
Object, so that being polluted after flue gas emission enters in atmosphere to atmospheric environment.In order to solve can not effectively to remove cigarette in the related technology
SO in gas2, the pollutants such as NO the technical issues of, the embodiment of the invention provides a kind of alkali recovery furnace flue gas minimum discharge devices
And flue gas processing method improves efficiency of dust collection its object is to effectively remove the dust in flue gas.Alkali is returned below with reference to Fig. 1
Kiln gas minimum discharge device is received to be illustrated.
The alkali recovery furnace flue gas minimum discharge device, including alkali recovery furnace 10, electrostatic precipitator 20, flue gas mixer 30,
Desulphurization denitration absorption tower 60 and wet electrical dust precipitator 70, alkali recovery furnace 10, electrostatic precipitator 20, flue gas mixer 30, desulfurization are de-
Nitre absorption tower 60 and wet electrical dust precipitator 70 are sequentially connected, and flue gas mixer 30 includes reaction chamber 31 and sprays into strong oxidizer anti-
Indoor spray gun 32 is answered, the both ends of reaction chamber 31 are connected with electrostatic precipitator 20 and desulphurization denitration absorption tower 60 respectively, spray gun 32
It is connected with reaction chamber 31.
Optionally, spray gun 32 includes spray head, the body of a gun and air accumulator, and spray head is set in reaction chamber 31, the body of a gun and air accumulator
It is set to outside reaction chamber 31, spray head and air accumulator are connected with the body of a gun respectively.In the present embodiment, the body of a gun is equipped with control switch,
Consequently facilitating controlling whether to inject strong oxidizer into reaction chamber 31.In specific implementation, for the ease of by reaction chamber 31
Interior flue gas is sufficiently mixed with strong oxidizer, so that it is sufficiently reacted, is connected with blower between reaction chamber 31 and electrostatic precipitator 20
40。
In order to reduce the processing exhaust gas volumn on absorption tower, prevent flue-gas temperature excessively high with influence desulphurization denitration absorption tower 60 and
The service life of wet electrical dust precipitator 70；Gas cooler 50 is connected between flue gas mixer 30 and desulphurization denitration tower 60, in addition,
Wet electrical dust precipitator 70 is connected with flue gas heater 80, and flue gas is heated up, can be white to avoid generating after flue gas and hot air
The phenomenon that cigarette.
Optionally, first circulation pump 53, furthermore, cigarette are connected between gas cooler 50 and flue gas heater 80
One end of Gas Cooler 50 and one end of flue gas heater 80 are connected by the first cooling pipe 51, gas cooler 50 it is another
End is connected with the other end of flue gas heater 80 by the second cooling pipe 52, and first circulation pump 53 is set to the first cooling pipe
51 or second on cooling pipe 52, in order to extract the cooling water in gas cooler 50 into flue gas heater 80, or
Cooling water in flue gas heater 80 is extracted into gas cooler 50, so that cooling water is recycled, reduces energy consumption.
Desulphurization denitration absorption tower 60 includes absorption tower ontology 61, airflow uniform distribution component 62, the first spray assemblies 63 and demisting
Device 64, absorption tower ontology 61 are connected with flue gas mixer 30 and wet electrical dust precipitator 70, airflow uniform distribution component 62, the first spray group
Part 63 and demister 64 are set in turn in absorption tower ontology 61.In the present embodiment, airflow uniform distribution component 62, the first spray group
Part 63 and demister 64 are set gradually from lower to upper in absorption tower ontology 61.
Optionally, absorption tower ontology 61 is equipped with first input end 66 and the first output end 67, and first input end 66 is opposite
Positioned at the lower section of airflow uniform distribution component 62, the first output end 67 is located relatively at the top of demister 64, first input end 66 and cigarette
Gas Cooler 50 is connected, and the first output end 67 is connected with wet electrical dust precipitator 70.
In specific implementation, for the ease of the first spray assemblies 63 to flue gas spray desulfurizing agent so that in flue gas
Diffluent SO2With high price NOXSufficiently dissolution, the first spray assemblies 63 include nozzle, fluid reservoir and second circulation pump 65, nozzle
It is set in absorption tower ontology 61, fluid reservoir and second circulation pump 65 are set to outside absorption tower ontology 61, and second circulation pumps
65 are connected with nozzle and fluid reservoir.In the present embodiment, nozzle quantity at least two, at least two nozzles are uniformly distributed in suction
It receives on the same plane in tower ontology 61.
Optionally, desulfurizing agent is weak white liquor；Alternatively, desulfurizing agent is white clay.
Wet electrical dust precipitator 70 includes body of deduster 71, water conservancy diversion distribution component 72 and the second spray assemblies 73, water conservancy diversion point
Cloth component 72 and second spray assemblies 73 are set in turn in body of deduster 71, and water conservancy diversion distribution component 72 is located at the second spray
Drench the top of component 73.
In general, wet electrical dust precipitator 70 further includes high-voltage rectifying transformer 74 and the charged component 75 of anode and cathode, high repoussage
Convertor transformer 74 is set in body of deduster 71 and is connected with the charged component 75 of anode and cathode, in the present embodiment, anode and cathode lotus
Electrical component 75 includes cathode line and anode plate, and cathode line and anode plate are alternatively arranged in body of deduster 71, i.e., cathode line is set
It is placed in the side of anode plate, anode plate is set to the side of cathode line, and rectifier transformer 74 is connected with cathode line.
In specific implementation, low-tension supply is changed into high voltage power supply and by high voltage power supply by high-voltage rectifying transformer 74
Cathode line power supply to the charged component of anode and cathode 75, so that the charged component 75 of anode and cathode generates strong electrical field, thus will be through the second spray
The drop and fine particulates drenched in the flue gas after component 73 sprays is separated.
Optionally, body of deduster 71 is equipped with the second input terminal 76 and second output terminal 77, and the second input terminal 76 is opposite
The top of component 72 is evenly distributed with positioned at water conservancy diversion, second output terminal 77 is located relatively at the lower section of the charged component 75 of anode and cathode, the second input
End 76 is connected with first output end 67 on desulphurization denitration absorption tower 60, and second output terminal 77 is connected with flue gas heater 80, flue gas
Heater 80 is connected with chimney 90.
In conclusion alkali recovery furnace flue gas minimum discharge device provided by the embodiments of the present application, is gone by electrostatic precipitator
The NO in flue gas is oxidized to high price NO except most of dust in flue gas, then by flue gas mixerX, then pass through desulfurization again
Denitration absorption tower is by NOXWith the SO in flue gas2Dissolution removal finally again carries out the dust in flue gas by wet electrical dust precipitator
It further removes, so that dust, nitrogen oxides and SO in the flue gas of discharge2Content meet atmospheric emission standard；
In addition, the flue gas that will be inputted in desulphurization denitration absorption tower is cooled down by gas cooler, and heated up group by flue gas
Part will heat up through wet electrical dust precipitator treated flue gas, convenient for flue gas diffusion discharge, and by gas cooler and flue gas
Cooling water recycles between heater, to reduce energy consumption.
Fig. 2 is the flow chart of flue gas processing method provided by one embodiment of the present invention, which can answer
For above-mentioned alkali recovery furnace flue gas minimum discharge device, which includes:
Step 201, alkali recovery furnace is collected former flue gas and is transported in electrostatic precipitator.
Step 202, electrostatic precipitator carries out the first dust removal process to former flue gas and forms the first flue gas, and the first flue gas is defeated
It send into flue gas mixer.
In the present embodiment, electrostatic precipitator 20 includes discharge electrode and collecting electrode, discharge electrode and collecting electrode it
Between form high voltage electric field, when flue gas pass through the high voltage electric field when, flue gas ionizes, and the large dust particle in flue gas is in high-voltage electricity
It is charged and separated with air-flow under field action, and remaining flue gas export from electrostatic precipitator 20 as the first flue gas and into flue gas
In mixer 30.
Step 203, flue gas mixer carries out oxidation processes to the first flue gas and forms the second flue gas, and the second flue gas is conveyed
To desulphurization denitration absorption tower.
In specific implementation, flue gas mixer 30 includes reaction chamber 31 and spray gun 32, and spray gun 32 includes spray head, the body of a gun
And air accumulator, oxidation processes include: that air accumulator provides strong oxidizer to the body of a gun；Strong oxidizer is supplied to spray head by the body of a gun；Spray head
Strong oxidizer is spurted into reaction chamber 31, so that the NO in flue gas and strong oxidizer sufficiently react to generate high price
NOX, NOXThe second flue gas is mixed to form with remaining flue gas and is exported.
Optionally, it is connected with gas cooler 50 between reaction chamber 31 and desulphurization denitration tower 60, reaction chamber 31 is by the second flue gas
It is delivered to cooling, gas cooler 50 in gas cooler 50 and the second flue gas after cooling is delivered to desulphurization denitration absorption tower 60
It is interior.
Step 204, desulphurization denitration absorption tower carries out the second dust removal process to the second flue gas and forms third flue gas, and by third
Flue gas inputs in wet electrical dust precipitator.
Optionally, desulphurization denitration absorption tower 60 includes absorption tower ontology 61, airflow uniform distribution component 62, the first spray assemblies 63
With demister 64, the second dust removal process includes: absorption tower ontology 61 through the cooling of gas cooler 50, treated for receiving
Two flue gases；The second flue gas being input in absorption tower ontology 61 is uniformly distributed in absorption tower ontology 61 by airflow uniform distribution component 62
It is interior；First spray assemblies 63 are to equally distributed second flue gas spray desulfurizing agent to dissolve the SO in the second flue gas2With high price NOX
And dust particle, in addition, remaining flue gas forms third flue gas, the second flue gas with certain temperature forms the first mist to the cold
Gas；Demister 64 separates the first fog and third flue gas, further says, demister 64 makes the liquefaction of the first fog flow to absorption
61 bottom of tower ontology separates the first fog and third flue gas；Third flue gas is exported to wet type electricity and is removed by absorption tower ontology 61
In dirt device 70.
Step 205, wet electrical dust precipitator carries out third dust removal process to third flue gas and forms the 4th flue gas, and by the 4th cigarette
Gas output.
In specific implementation, wet electrical dust precipitator 70 includes body of deduster 71, the spray of water conservancy diversion distribution component 72, second
Drenching component 73, high-voltage rectifying transformer 74 and the charged component 75 of anode and cathode, third dust removal process includes: that third flue gas is input to
In the body of deduster 71 of wet electrical dust precipitator 70；Third flue gas is uniformly distributed in body of deduster 71 by water conservancy diversion distribution component 72
It is interior；Second spray assemblies 73 spray equally distributed third flue gas；High-voltage rectifying transformer 74 changes low-tension supply
It powers for high voltage power supply and to the cathode line of the charged component of anode and cathode 75, the charged component 75 of anode and cathode generates strong electrical field, absorption warp
Drop in third flue gas and fine particulates after spray are so that it is separated from third flue gas, third after processing
Flue gas forms the 4th flue gas, to export out of body of deduster 71.
Optionally, wet electrical dust precipitator 70 is connected with flue gas heater 80, and flue gas heater 80 is connected with chimney 90, through wet
After the processing of formula electric precipitator 70 and the 4th flue gas that is exported first is heated through flue gas heater 80, then is transported to chimney 90, is led to
It crosses chimney and is discharged into atmosphere.
In the present embodiment, first circulation pump 53 is connected between gas cooler 50 and flue gas heater 80, flue gas is cooling
Cooling water in device 50 absorbs the heat through treated the second flue gas of flue gas mixer 30, and cooling water temperature increases；First follows
Cooling water after ring pump 53 increases temperature is extracted to flue gas heater 80；80 pairs of flue gas heater through wet electrical dust precipitator 70
Treated, and the 4th flue gas carries out heating treatment, cooling water temperature decline；First circulation pump 53 temperature is declined after cooling water
It extracts to gas cooler 50.
In conclusion flue gas processing method provided by the embodiments of the present application, first passes through in electrostatic precipitator removal flue gas
The dust of bulky grain；Inject strong oxidizer into flue gas by flue gas mixer NO to be oxidized to the NO of high priceX, consequently facilitating
Desulphurization denitration absorption tower is by the SO in itself and flue gas2It absorbs, and passes through wet electrical dust precipitator for the fine solid particle in flue gas
Grain is got rid of, so that the discharge of flue gas meets national emission standard, avoids pollution atmosphere.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
The instructions such as " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Above is only a specific embodiment of the present invention, but technical characteristic of the invention is not limited thereto, Ren Heben
Within the field of the present invention, made changes or modifications all cover within the scope of the patent of the present invention the technical staff in field.
Claims (9)
1. a kind of device of alkali recovery furnace flue gas minimum discharge, including alkali recovery furnace and electrostatic precipitator, which is characterized in that also wrap
Include flue gas mixer, desulphurization denitration absorption tower and wet electrical dust precipitator, the alkali recovery furnace, the electrostatic precipitator, the cigarette
Gas mixer, the desulphurization denitration absorption tower and the wet electrical dust precipitator are sequentially connected, and the flue gas mixer includes reaction
Room and strong oxidizer is sprayed into the indoor spray gun of the reaction, the both ends of the reaction chamber respectively with the electrostatic precipitator and institute
It states desulphurization denitration absorption tower to be connected, the spray gun is connected with the reaction chamber.
2. alkali recovery furnace flue gas minimum discharge device according to claim 1, which is characterized in that the spray gun includes spray
Head, the body of a gun and air accumulator, the spray head are set in the reaction chamber, and the body of a gun and the air accumulator are set to the reaction
Outdoor, the spray head and the air accumulator are connected with the body of a gun respectively.
3. alkali recovery furnace flue gas minimum discharge device according to claim 1, which is characterized in that the desulphurization denitration absorbs
Tower includes absorption tower ontology, airflow uniform distribution component, the first spray assemblies and demister, and the absorption tower ontology and the flue gas are mixed
Clutch is connected with the wet electrical dust precipitator, and the airflow uniform distribution component, first spray assemblies and the demister are successively
It is set in the absorption tower ontology.
4. alkali recovery furnace flue gas minimum discharge device according to claim 3, which is characterized in that the reaction chamber with it is described
Gas cooler is connected between desulphurization denitration tower, the wet electrical dust precipitator is connected with the flue gas heater, and the flue gas is cold
But first circulation pump is connected between device and the flue gas heater.
5. alkali recovery furnace flue gas minimum discharge device according to claim 1, which is characterized in that the wet electrical dust precipitator
It is described including body of deduster, water conservancy diversion distribution component, the second spray assemblies, high-voltage rectifying transformer and the charged component of anode and cathode
Water conservancy diversion distribution component, second spray assemblies and the charged component of the anode and cathode are set in turn in the body of deduster,
The high-voltage rectifying transformer is set in the body of deduster and is connected with the cathode line of the charged component of the anode and cathode.
6. a kind of flue gas processing method, which is characterized in that it is ultralow to be applied to a kind of alkali recovery furnace flue gas as described in claim 1
In tapping equipment, the flue gas processing method includes:
The alkali recovery furnace is collected former flue gas and is transported in the electrostatic precipitator；
The electrostatic precipitator carries out the first dust removal process to the former flue gas and forms the first flue gas, and first flue gas is defeated
It send into the flue gas mixer；
The flue gas mixer carries out oxidation processes to first flue gas and forms the second flue gas, and second flue gas is conveyed
In to the desulphurization denitration absorption tower；
The desulphurization denitration absorption tower carries out the second dust removal process to second flue gas and forms third flue gas, and by the third
Flue gas inputs in the wet electrical dust precipitator；
The wet electrical dust precipitator carries out third dust removal process to the third flue gas and forms the 4th flue gas, and by the 4th cigarette
Gas output.
7. dust removal method according to claim 6, which is characterized in that the spray gun includes spray head, the body of a gun and air accumulator, institute
Stating oxidation processes includes:
The air accumulator provides strong oxidizer to the body of a gun；
Strong oxidizer is supplied to the spray head by the body of a gun；
The spray head spurts into strong oxidizer in the reaction chamber.
8. dust removal method according to claim 6, which is characterized in that connect between the reaction chamber and the desulphurization denitration tower
There is gas cooler, the wet electrical dust precipitator is connected with the flue gas heater, and the gas cooler adds with the flue gas
First circulation pump, the flue gas processing method are connected between hot device further include: the cooling water in the gas cooler absorbs warp
The heat of the flue gas mixer treated second flue gas, the cooling water temperature increase；
Cooling water after the first circulation pump increases temperature is extracted to the flue gas heater；
The flue gas heater is described cold to through the wet electrical dust precipitator, treated that the 4th flue gas carries out heating treatment
But coolant-temperature gage declines；
Cooling water after the first circulation pump declines temperature is extracted to the flue gas cooling component.
9. dust removal method according to claim 7, which is characterized in that the desulphurization denitration absorption tower includes absorption tower sheet
Body, airflow uniform distribution component, the first spray assemblies and demister, second dust removal process include: that the absorption tower ontology is used for
It receives through gas cooler cooling treated the second flue gas；
The airflow uniform distribution component will be input to intrinsic second flue gas in the absorption tower and be uniformly distributed in the absorption
In tower ontology；
First spray assemblies are to the equally distributed second flue gas spray desulfurizing agent to dissolve in second flue gas
SO2With high price NOXAnd it forms third flue gas and the first fog；
The demister separates first fog and the third flue gas；
The absorption tower ontology exports third flue gas into the wet electrical dust precipitator.
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| CN201811391824.0A CN109550341A (en) | 2018-11-21 | 2018-11-21 | Alkali recovery furnace flue gas minimum discharge device and flue gas processing method |
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| CN110684897A (en) * | 2019-09-11 | 2020-01-14 | 广东韶钢工程技术有限公司 | Wet-type electric dust removal system for sintering dust |
| CN110975525A (en) * | 2019-11-06 | 2020-04-10 | 福建省青山纸业股份有限公司 | Production method for effectively reducing emission of dust and sulfur dioxide in flue gas of alkali recovery furnace |
| CN111207407A (en) * | 2019-10-18 | 2020-05-29 | 云南中陇生态环境工程有限公司 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
| CN112495114A (en) * | 2020-12-16 | 2021-03-16 | 上海宝钢节能环保技术有限公司 | Device for ultra-clean emission and white elimination treatment of wet flue gas of dust-containing steam flow |
| CN112516769A (en) * | 2020-11-17 | 2021-03-19 | 张优 | High-efficient plasma discharge desulfurization equipment |
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| CN112495114A (en) * | 2020-12-16 | 2021-03-16 | 上海宝钢节能环保技术有限公司 | Device for ultra-clean emission and white elimination treatment of wet flue gas of dust-containing steam flow |
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