CN102989280B - A kind of flue gas purifying method and purifier - Google Patents
A kind of flue gas purifying method and purifier Download PDFInfo
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- CN102989280B CN102989280B CN201210468254.7A CN201210468254A CN102989280B CN 102989280 B CN102989280 B CN 102989280B CN 201210468254 A CN201210468254 A CN 201210468254A CN 102989280 B CN102989280 B CN 102989280B
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- flue gas
- water
- liquid
- waste
- waste liquid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to a kind of flue gas purifying method and purifier, the step of its method comprises: 1) flue gas pretreatment link, adds oxidant in the low-temperature flue gas of preheater, by the NO in flue gas
x, SO
2be converted into water-soluble high price compound; 2) flue gas spray and waste collection link, mixes high price compound with water, forms the waste liquid of high price compound; 3) biological denitrification link, by the effect of the high price compound in bacterium and waste liquid, generates thalline derivative.Because the present invention uses the mode of initial oxidation-rear biochemical treatment, by the NO in flue gas
x, SO
2by after secondary conversion as thalline derivative output, whole process does not have greenhouse gas emission and catalyst to escape, and therefore can not cause secondary pollution.Because high price compound very easily generates acid waste liquid with water, therefore can harmful substance fully in filtering flue gas, there is higher gas cleaning efficiency.
Description
Technical field
The present invention relates to a kind of flue gas processing device, be specifically related to a kind ofly can be used for denitration, the flue gas purifying method of desulfurization and decarburization and smoke eliminator.
Background technology
Nitrogen, sulphur, oxycarbide (NO containing high concentration in the flue gas of the cement plant being fuel with fire coal, fuel oil, biomass fuel, power plant, iron and steel enterprise, district heating system discharge
x, SO
2), both do not met more and more stricter environmental requirement, and also caused direct harm to ecological environment and health, therefore adopting suitable mode to process the flue gas produced after fuel combustion is the most effective way controlling discharge of poisonous waste.
With nitrogen oxide NO
xfor example, denitrating flue gas processing method conventional at present mainly comprises oxidizing process and reducing process, and object is by the NO in flue gas by denitration
xremoving, to reach standard-required.Oxidizing process adds in flue gas by oxidant, makes NO
xbe converted into water-soluble higher nitrogen oxides, then add antalkali and make chemical fertilizer; Its shortcoming is that operating cost is high, and the quality of chemical fertilizer is bad.
Reducing process common are SCR and SNCR, and its principle is under the effect of catalyst, by spraying into reducing agent (such as: ammoniacal liquor, urea) by the NO in flue gas
xbe reduced into the N of nontoxic pollution-free
2and H
2o.Its shortcoming is the escape having ammonia when adopting ammoniacal liquor, causes secondary pollution; CO can be increased when using urea
2discharge; These two kinds of method denitration efficiencies are lower, and operating cost is higher.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind ofly have that efficiency is high, cost is low, the denitration of pollution-free feature, desulfurization, decarburization, dedusting flue gas purifying method; According to the smoke eliminator that said method builds.
Technical scheme of the present invention is as follows:
A kind of flue gas purifying method, its step comprises:
1) flue gas pretreatment link, adds oxidant in the low-temperature flue gas of preheater, by the NO in flue gas
x, SO
2be converted into water-soluble high price compound;
2) flue gas spray and waste collection link, described high price compound and water generate the waste liquid of described high price compound;
3) biological denitrification link, by the effect of the described high price compound in bacterium and described waste liquid, generates thalline derivative.
The described thalline derivative generated in described step 3) is recycled as derivative, and in remaining dust-laden slurries, isolated waste water is purified liquid after purifying, and described decontaminating liquid joins flue gas spray link and recycles.
A kind of smoke eliminator, is characterized in that: it comprises the oxidant injection device for being mixed into by oxidant in preheater low-temperature flue gas, and described oxidant is by the NO in flue gas
x, SO
2change into water-soluble high price compound; Entrance for the dust arrester installation of dedusting is connected with exhanst gas outlet, and the outlet of described dust arrester installation is connected with the bottom of spray column; The top of described spray column is exhanst gas outlet up to standard, the middle part of described spray column arranges one or more shower nozzle of purifying waste water, the water-soluble rear formation waste liquid of described high price compound, the bottom of described spray column is waste collection groove, and the liquid outlet of described waste collection groove is connected with biological reactor by transfusion system; Described biological reactor is in-built containing germy biological respinse liquid, and the high price compound effects in described bacterium and described waste liquid generates thalline derivative.
Described transfusion system comprises delivery pump, waste liquid shower nozzle and overflow pipe, and described waste liquid enters described biological reactor by described delivery pump by described waste collection groove, and unnecessary described waste liquid gets back to the middle part of described spray column by described waste liquid shower nozzle; When overfall higher than described overflow pipe of the liquid level of the described waste liquid in described waste collection groove, described waste liquid directly enters described biological reactor by described overflow pipe.
The setting position of described waste liquid shower nozzle is lower than described shower nozzle of purifying waste water, and the setting position of the overfall of described overflow pipe is lower than described waste liquid shower nozzle.
Arrange derivative gathering-device in described biological reactor, described thalline derivative is attached on derivative gathering-device and reclaims.
Described biological reactor bottom precipitation has dust-laden slurries, the dust-laden serum outlet of described biological respinse pot bottom connects solid-liquid separator by delivery pump, the liquid outlet of described solid-liquid separator connects waste water processing station and nanometer water processor successively, and shower nozzle of purifying waste water described in the decontaminating liquid that described nanoprocessor exports passes through enters described spray column.
The outlet of described dust arrester installation be arranged on more than the liquid level of described waste collection groove, described in purify waste water below shower nozzle.
The outlet of described dust arrester installation is arranged on below more than the liquid level of described waste collection groove, described waste liquid shower nozzle.
The outlet of described dust arrester installation arranges gas analysis metering instrument and thermometric measuring cell, and the top exit of described spray column arranges gas analysis metering instrument, the Monitoring Data input control system of described gas analysis metering instrument and thermometric measuring cell.
Also comprise a water replanishing device, shower nozzle of purifying waste water described in clean water inputs by described water replanishing device.
Described spray column is vertical or horizontal.
Technique effect of the present invention is as follows:
A kind of flue gas purifying method of the present invention, its step comprises: 1) flue gas pretreatment link, adds oxidant in the low-temperature flue gas of preheater, by the NO in flue gas
x, SO
2be converted into water-soluble high price compound; 2) flue gas spray and waste collection link, form the waste liquid of high price compound by high price compound and water; 3) biological denitrification link, by the effect of the high price compound in bacterium and waste liquid, generates thalline derivative.Because the present invention uses the mode of initial oxidation-rear biochemical treatment, by the NO in flue gas
x, SO
2by after secondary conversion as thalline derivative output, whole process does not have greenhouse gas emission and catalyst to escape, and therefore can not cause secondary pollution.Because high price compound very easily generates acid waste liquid with water, therefore can harmful substance fully in filtering flue gas, there is higher gas cleaning efficiency.
Because the present invention uses bacterium to carry out biological cleaning to waste liquid, the thalline derivative produced also can be used for other field, and part compensate for the expense in gas cleaning, therefore reduces gas cleaning cost comprehensively.
Biological reactor is connected by transfusion system bottom spray column in smoke eliminator of the present invention, waste liquid in spray column is entered in biological reactor and carries out biochemical reaction, the flow of waste liquid is controlled, ensure that the biochemical reaction in biological reactor fully carries out.And transfusion system can prevent the excessive generation overflow of waste liquid in waste collection groove.
Water, by Separation of Solid and Liquid process, again enters in spray column and participates in gas cleaning process as hydraulic fluid, both ensure that the water supply of spray column, and again saved water resource by the dust-laden slurries of biological reactor bottom precipitation after purification.
Accompanying drawing explanation
Fig. 1 is smoke eliminator structural representation of the present invention
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be described.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
For denitrification process, flue gas purifying method of the present invention mainly comprises flue gas pretreatment link, flue gas spray and waste collection link, biological denitrification link and wastewater treatment and purification utilization link,
1) flue gas pretreatment link, adds oxidant in the low-temperature flue gas of preheater, as potassium permanganate, makes NO in flue gas
xbe converted into water-soluble high price nitride;
2) flue gas spray and waste collection link, high price nitride mixes with water in flue gas spray and waste collection link, forms the waste liquid of high price nitride;
3) biological denitrification link, by the effect of the high price nitride in bacterium and waste liquid, generates free of contamination thalline derivative;
4) wastewater treatment and purification utilization link, recycle thalline derivative as derivative, is purified liquid after being purified by the isolated waste water of dust-laden slurries remaining in waste liquid, and decontaminating liquid joins flue gas spray link and recycles.
As shown in Figure 1, be example by cement industry common at present, smoke eliminator of the present invention at least comprises oxidant injection device 1, dust arrester installation 2, spray column 3, biological reactor 4, water treatment facilities 5.Oxidant injection device 1 comprises oxidant storage tank 11 and delivery pump 12, and the oxidant in oxidant storage tank 11 is injected the low-temperature flue gas of preheater by delivery pump 12, and oxidant is by the NO in flue gas
xchange into water-soluble high price nitride.Dust arrester installation 2 comprises dust-precipitator 21, waste heat using device 22 and air-introduced machine 23, and its 22 one end of UTILIZATION OF VESIDUAL HEAT IN connects the gas outlet of kiln tail, and the other end connects the air inlet of dust-precipitator 21, and the gas outlet of dust-precipitator 21 connects the bottom of spray column 3 by air-introduced machine 23.Like this through waste heat using device 22 lower the temperature flue gas after dust-precipitator 21 dedusting, enter the bottom of spray column 3.
The top of spray column 3 is exhanst gas outlet 31 up to standard, middle part arranges one or more shower nozzle 32 of purifying waste water, bottom is waste collection groove 33, flue gas high price nitride in the motion process upwards of bottom mix the waste liquid being formed afterwards and contain acid nitride, in the waste collection groove 33 bottom waste liquid enters under the Action of Gravity Field of self with the water that shower nozzle 32 of purifying waste water spray.Flue gas after removing high price nitride is discharged by exhanst gas outlet 31 up to standard as flue gas up to standard.Spray column 3 can be and is highly greater than the vertical of width or width and is greater than the horizontal of height, and when spray column 3 is horizontal, shower nozzle 32 of purifying waste water also is set to transversely arranged adaptively.Inevitably have a small amount of water in the liquefaction process of high price nitride to discharge with flue gas up to standard, so need water replanishing device 34 to carry out moisturizing, pure water directly sprays into spray column 3 through shower nozzle 32 of purifying waste water.
The liquid outlet of waste collection groove 33 is connected with biological reactor 4 by transfusion system 6, transfusion is 6 comprise delivery pump 61, waste liquid shower nozzle 62 and overflow pipe 63, waste liquid enters biological reactor 4 by delivery pump 61 by waste collection groove 33, and unnecessary waste liquid gets back to the middle part of spray column 3 by waste liquid shower nozzle 62.When overfall higher than overflow pipe 63 of the liquid level of the waste liquid in waste collection groove 33, waste liquid directly enters biological reactor 4 by overflow pipe 63.Wherein, the setting position of waste liquid shower nozzle 62 is lower than shower nozzle 32 of purifying waste water, and the setting position of the overfall of overflow pipe 63 is lower than waste liquid shower nozzle 62.
Biological reactor 4 is in-built containing germy biological respinse liquid, and the acid nitride effect in bacterium and waste liquid generates thalline derivative.Thalline derivative is derivatized thing gathering-device 41 as derivative and reclaims, connected the water inlet of waste water processing station 51 by delivery pump 42 bottom biological reactor 4, dust-laden slurries carry out Separation of Solid and Liquid in water treatment station 51, the water separated enters in nanometer water processor 52 and purifies, and the decontaminating liquid obtained enters spray column 3 by shower nozzle 32 of purifying waste water.
The outlet of dust-precipitator 21 arranges the gas analysis metering instrument 7 detected composition and the content of flue gas, to the thermometric measuring cell 8 that temperature and pressure detects, the exhanst gas outlet 31 at spray column 3 top arranges the gas analysis metering instrument 7 detected composition and the content of flue gas up to standard.The Monitoring Data contrast of Monitoring Data input control system 9, the two gas analysis metering instrument 7 of gas analysis metering instrument 7 and thermometric measuring cell 8 can draw the parameter that the change of denitrating flue gas efficiency, operational factor and other needs compare and control.The workflow of oxidant injection device 1, dust arrester installation 2, spray column 3, biological reactor 4, water treatment facilities 5 and transfusion system 6 controls by control system 9, startup opportunity etc. of the flow of the actual and injection rate of the injection as oxidant, transfusion system 6 delivery pump 61 and waste liquid shower nozzle 62 and overflow pipe 63.
It should be pointed out that the above detailed description of the invention can make the invention of those skilled in the art's comprehend, but do not limit the present invention in any way creation.Therefore; although this description has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can modify to the invention or equivalent replacement; in a word, all do not depart from technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (8)
1. a smoke eliminator, is characterized in that: it comprises the oxidant injection device for being mixed into by oxidant in preheater low-temperature flue gas, and described oxidant is by the NO in flue gas
x, SO
2change into water-soluble high price compound; Entrance for the dust arrester installation of dedusting is connected with exhanst gas outlet, and the outlet of described dust arrester installation is connected with the bottom of spray column; The top of described spray column is exhanst gas outlet up to standard, the middle part of described spray column arranges one or more shower nozzle of purifying waste water, the water-soluble rear formation waste liquid of described high price compound, the bottom of described spray column is waste collection groove, and the liquid outlet of described waste collection groove is connected with biological reactor by transfusion system; Described biological reactor is in-built containing germy biological respinse liquid, and described bacterium and described waste liquid effect generate thalline derivative; Arrange derivative gathering-device in described biological reactor, described thalline derivative is attached on derivative gathering-device and reclaims; Described biological reactor bottom precipitation has dust-laden slurries, the dust-laden serum outlet of described biological respinse pot bottom connects solid-liquid separator by delivery pump, the liquid outlet of described solid-liquid separator connects waste water processing station and nanometer water processor successively, and shower nozzle of purifying waste water described in the decontaminating liquid that described nanoprocessor exports passes through enters described spray column; Described transfusion system comprises delivery pump, waste liquid shower nozzle and overflow pipe, and described waste liquid enters described biological reactor by described delivery pump by described waste collection groove, and unnecessary described waste liquid gets back to the middle part of described spray column by described waste liquid shower nozzle; When overfall higher than described overflow pipe of the liquid level of the described waste liquid in described waste collection groove, described waste liquid directly enters described biological reactor by described overflow pipe.
2. a kind of smoke eliminator as claimed in claim 1, is characterized in that: the setting position of described waste liquid shower nozzle is lower than described shower nozzle of purifying waste water, and the setting position of the overfall of described overflow pipe is lower than described waste liquid shower nozzle.
3. a kind of smoke eliminator as claimed in claim 1, is characterized in that: the outlet of described dust arrester installation be arranged on more than the liquid level of described waste collection groove, described in purify waste water below shower nozzle.
4. a kind of smoke eliminator as claimed in claim 1, is characterized in that: the outlet of described dust arrester installation is arranged on below more than the liquid level of described waste collection groove, described waste liquid shower nozzle.
5. a kind of smoke eliminator as claimed in claim 1, it is characterized in that: the outlet of described dust arrester installation arranges gas analysis metering instrument and thermometric measuring cell, the top exit of described spray column arranges gas analysis metering instrument, the Monitoring Data input control system of described gas analysis metering instrument and thermometric measuring cell.
6. a kind of smoke eliminator as claimed in claim 1, is characterized in that: also comprise a water replanishing device, shower nozzle of purifying waste water described in clean water inputs by described water replanishing device.
7. a kind of smoke eliminator as claimed in claim 1, is characterized in that: described spray column is vertical or horizontal.
8. a flue gas purifying method, carry out in the device as described in as arbitrary in claim 1-7, its step comprises:
1) flue gas pretreatment link, adds oxidant in the low-temperature flue gas of preheater, by the NO in flue gas
x, SO
2be converted into water-soluble high price compound;
2) flue gas spray and waste collection link, described high price compound and water generate the waste liquid of described high price compound;
3) biological denitrification link, by the effect of the described high price compound in bacterium and described waste liquid, generates thalline derivative;
Described step 3) in the described thalline derivative that generates recycle as derivative, in remaining dust-laden slurries, isolated waste water is purified liquid after purifying, and described decontaminating liquid joins flue gas spray link and recycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468254.7A CN102989280B (en) | 2012-11-19 | 2012-11-19 | A kind of flue gas purifying method and purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468254.7A CN102989280B (en) | 2012-11-19 | 2012-11-19 | A kind of flue gas purifying method and purifier |
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| Publication Number | Publication Date |
|---|---|
| CN102989280A CN102989280A (en) | 2013-03-27 |
| CN102989280B true CN102989280B (en) | 2015-09-02 |
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| CN201210468254.7A Expired - Fee Related CN102989280B (en) | 2012-11-19 | 2012-11-19 | A kind of flue gas purifying method and purifier |
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| CN111921306B (en) * | 2020-07-31 | 2022-03-22 | 常州多单微电子设备有限公司 | Oil smoke waste gas effluent disposal system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE68914693D1 (en) * | 1988-01-18 | 1994-05-26 | Bertin & Cie | Process and plant for the purification of sulfur oxides and possibly exhaust gases containing nitrogen oxides. |
| US5788944A (en) * | 1995-02-28 | 1998-08-04 | Babcock-Hitachi Kabushiki Kaisha | Wet-type flue gas desulfurization plant and method making use of a solid desulfurizing agent |
| RU2164167C2 (en) * | 1995-03-24 | 2001-03-20 | Паквес Био Системз Б.В. | Method of gases treatment and device for its embodiment |
| CA2222900C (en) * | 1995-06-02 | 2003-04-01 | Geobiotics, Inc. | Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| CN101307289A (en) * | 2008-02-14 | 2008-11-19 | 朱洪 | Biological culturing method and device for reducing discharge of waste gases |
| CN203030172U (en) * | 2012-11-19 | 2013-07-03 | 高玉宗 | Flue gas purification device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11235517A (en) * | 1998-02-23 | 1999-08-31 | Hitachi Ltd | Gas purifier |
-
2012
- 2012-11-19 CN CN201210468254.7A patent/CN102989280B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE68914693D1 (en) * | 1988-01-18 | 1994-05-26 | Bertin & Cie | Process and plant for the purification of sulfur oxides and possibly exhaust gases containing nitrogen oxides. |
| US5788944A (en) * | 1995-02-28 | 1998-08-04 | Babcock-Hitachi Kabushiki Kaisha | Wet-type flue gas desulfurization plant and method making use of a solid desulfurizing agent |
| RU2164167C2 (en) * | 1995-03-24 | 2001-03-20 | Паквес Био Системз Б.В. | Method of gases treatment and device for its embodiment |
| CA2222900C (en) * | 1995-06-02 | 2003-04-01 | Geobiotics, Inc. | Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| CN101307289A (en) * | 2008-02-14 | 2008-11-19 | 朱洪 | Biological culturing method and device for reducing discharge of waste gases |
| CN203030172U (en) * | 2012-11-19 | 2013-07-03 | 高玉宗 | Flue gas purification device |
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| CN102989280A (en) | 2013-03-27 |
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