CN105435607A - Exhaust-gas processing method - Google Patents
Exhaust-gas processing method Download PDFInfo
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- CN105435607A CN105435607A CN201410474181.1A CN201410474181A CN105435607A CN 105435607 A CN105435607 A CN 105435607A CN 201410474181 A CN201410474181 A CN 201410474181A CN 105435607 A CN105435607 A CN 105435607A
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- pulpous state
- separation tank
- filter cake
- exhaust
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Abstract
A provided exhaust-gas processing method is characterized by comprising a stage of alkali-washing absorption and combination deposition, a stage of settlement separation and a stage of filtering separation. The exhaust-gas processing method realizes the purposes of effectively processing exhaust gas and recovering metal carbonates by means of integration of programs.
Description
Technical field
The present invention about a kind of method of exhaust-gas treatment, espespecially a kind of processing method being applied to waste gas containing sour gas.
Background technology
The process of industrial waste gas is the industry problem that must solve now.But, do not provide effective integrated process for exhaust-gas treatment in prior art.Therefore, be necessary to provide a kind of method of exhaust-gas treatment to increase the efficiency of exhaust-gas treatment, and then reduce the cost expended needed in processing procedure, the surcharge increasing handling procedure and avoid waste gas for the harm of environment.
Summary of the invention
Because the shortcoming of above-mentioned known technology, inventor's thoughts its do not reach perfection, concentrate one's attention on research overcome so exhaust its intelligence, by means of being engaged in this industry accumulating experience for many years, and then develop a kind of method of exhaust-gas treatment, to reaching the object of the efficiency increasing exhaust-gas treatment.
Main purpose of the present invention is providing a kind of method of exhaust-gas treatment, it is characterized in that, it comprises: alkali cleaning absorb and in conjunction with precipitate phase, use the control valve system of SECO, guide the waste gas for processing by the fluid injection system of multi-direction charging, enter in the washing absorption unit containing alkali lye, form slightly solubility metallic salt precipitation, the solution comparatively clarified on upper strata is separated with solids of sedimentation material through equipment for separating liquid from solid, the solution of this clarification is transmitted back in washing absorption unit with circulating pump, cycling elution has removed the waste gas of acidic materials, the solution of solid portion and small part forms comparatively wet pulpous state sediment, with the first delivery pump, this pulpous state sediment is delivered to precipitation separation tank, in the sedimentation separation stage, make this pulpous state sediment enter precipitation separation tank from the top of precipitation separation tank, heavier solid portion is settled down to the bottom land of precipitation separation tank.The solution that upper strata is comparatively clarified flows into clarification liquid bath through equipment for separating liquid from solid, then washs absorptive unit recycling through the 3rd delivery pump pressurized delivered back scrubbing, and concentrated pulpous state sediment is sent to program control lautertuns via the second delivery pump; And the isolated by filtration stage, by concentrated pulpous state sediment through the second delivery pump pressurized delivered extremely program control lautertuns, after chimney filter group is filtered, concentrated pulpous state sediment forms filter cake, thicken to felicity condition until the absorption of this filter cake, utilize gas pressure official post filter cake to peel off, filtrate portion delivers to precipitation separation tank recycling after then utilizing pressure differential to be collected by collector.
Preferably, above-mentioned method, wherein controls the pH value of alkali lye within the scope of 8 ~ 12.
Preferably, above-mentioned method, wherein controls the pH value of alkali lye within the scope of 10 ~ 12.
Preferably, above-mentioned method, wherein controls the pH value of alkali lye within the scope of 8 ~ 10.
Preferably, above-mentioned method, wherein controls the pH value of alkali lye within the scope of 9 ~ 11.
Preferably, above-mentioned method, wherein alkali cleaning absorbs and in conjunction with in precipitate phase, uses deentrainment device further, removes the mist removed in the waste gas of acidic materials.
Preferably, above-mentioned method, wherein alkali cleaning absorb and in conjunction with the washing absorption unit in precipitate phase being use two more parallels.
Preferably, above-mentioned method, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 1 ~ 20 μm.
Preferably, above-mentioned method, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 5 ~ 15 μm.
Preferably, above-mentioned method, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 10 ~ 20 μm.
Preferably, above-mentioned method, wherein collects further the filter cake containing metal carbonate, resells to be used as to cement plant and supports by the arm adapted material.
Preferably, above-mentioned method, wherein uses plug-in strip baiting valve and the filter cake of rotating blanking valve packaging containing metal carbonate further.
The method of exhaust-gas treatment of the present invention, by the integration of program, and then reaches the object that effectively can process waste gas and Footwall drift carbonate.
For further describing the present invention, to make general technical staff of the technical field of the invention implement according to this, sincerely below further illustrate the present invention with several embodiment.So it should be noted, following examples are only in order to the present invention is further illustrated, and be not used to limit practical range of the present invention, and any those skilled in the art without prejudice under spirit of the present invention the modification of being reached and change, all belong to scope of the present invention.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method for exhaust-gas treatment of the present invention.
Fig. 2 is the alkali cleaning absorption of the method for exhaust-gas treatment of the present invention and the programme diagram in conjunction with precipitate phase.
Fig. 3 is the programme diagram in the sedimentation separation stage of the method for exhaust-gas treatment of the present invention.
Fig. 4 is the programme diagram in the isolated by filtration stage of the method for exhaust-gas treatment of the present invention.
01: washing absorption unit
03: precipitation separation tank
04: clarification liquid bath
05: program control lautertuns
07: circulating pump
08: the first delivery pump
09: the second delivery pump
10: the three delivery pumps
Detailed description of the invention
For fully understanding object of the present invention, feature and effect, existing by following specific embodiment, the present invention is described in detail, illustrates as rear:
The method of exhaust-gas treatment of the present invention as shown in Figure 1, comprise (one) alkali cleaning absorb and in conjunction with precipitate phase; (2) the sedimentation separation stage; And 3 stages such as (three) isolated by filtration stage, be described in detail as follows with regard to each stage respectively:
(1) alkali cleaning absorb and in conjunction with precipitate phase:
Fig. 2 is alkali cleaning of the present invention absorption and the programme diagram in conjunction with precipitate phase, as shown in Figure 2, this stage is the control valve system using SECO, and the processing procedure waste gas guiding wish to process or exhaust gases after combustion, by the fluid injection system of multi-direction charging, enter in washing absorption unit 01.Meanwhile, the alkali lye containing alkaline-earth metal ions is also imported in washing absorption unit 01.Carbon dioxide (CO contained in waste gas
2) gas forms carbanion (CO after alkali liquor absorption
3 2-) alkaline-earth metal ions in alkali lye is combined and generates slightly solubility metallic salt, this slightly solubility metallic salt is precipitated to the bottom of washing absorption unit 01.
Control the pH value of alkali lye within suitable alkaline range (such as: 8 ~ 12, the scopes such as 10 ~ 12,8 ~ 10,9 ~ 11), make the OH in solution
-ion is combined with carbon dioxide and forms carbanion.Its reaction equation is as follows:
M
2+ (aq)+ CO
3 2- (aq)→ MCO
3 (s)↓ (wherein, M is alkaline-earth metal)
Meanwhile, bottom the tank of washing absorption unit 01, constantly alkaline-earth metal ions (M is added
2+ion), keep its advantage, alkaline-earth metal ions can be constantly combined with carbanion, generate MCO
3solids of sedimentation.The carbon dioxide content of 60 ~ 90VOL% in removable waste gas.
The solution that upper strata is comparatively clarified is separated with solids of sedimentation material through equipment for separating liquid from solid, and be transmitted back in washing absorption unit 01 by the solution of this clarification with circulating pump 07, cycling elution has removed the waste gas of acidic materials.
The solution of solid portion and small part forms comparatively wet pulpous state sediment, with the first delivery pump 08, this pulpous state sediment is delivered to precipitation separation tank 03, carries out next stage program process.Slightly solubility slaine product bottom washing absorption unit 01 constantly can be removed according to Le Chatelier's principle, balance is constantly moved right; Simultaneously by reactant as OH
-and M
2+constantly supplement, balance acceleration can be impelled to move right, system operation so can be made uninterrupted continuously, can effectively process suitable large discharge containing sour gas (such as: CO
2, SO
2, NO
2and H
2s) waste gas.
Through alkali liquor absorption, removed the waste gas of acidic materials, after cycling elution and deentrainment device remove mist further, quite clean processed gas, drains into air by chimney after monitoring.
In above-mentioned embodiment, preferably can use the washing absorption unit of two more parallels, when one of them washing absorption cell failure maybe needs to safeguard, still have at least another washing absorption unit to maintain normal operation, exhaust-gas treatment flow process can be avoided thus therefore to stop.
(2) the sedimentation separation stage:
Fig. 3 is the programme diagram in sedimentation separation stage of the present invention, as shown in Figure 3, this stage be use first delivery pump 08 by pulpous state sediment pressurized delivered to precipitation separation tank 03, wherein pulpous state sediment enters precipitation separation tank 03 from the top of precipitation separation tank, and heavier solid portion is settled down to the bottom land of precipitation separation tank 03.The solution that upper strata is comparatively clarified flows into clarification liquid bath 04 through equipment for separating liquid from solid, then washs absorptive unit 01 recycling through the 3rd delivery pump 10 pressurized delivered back scrubbing.Concentrated pulpous state sediment is sent to program control lautertuns 05 via the second delivery pump 09, carries out next stage program process.
(3) the isolated by filtration stage:
Fig. 4 is the programme diagram in sedimentation separation stage of the present invention, as shown in Figure 4, this stage is through the second delivery pump 09 pressurized delivered extremely program control lautertuns 05 by concentrated pulpous state sediment, after chimney filter group through having suitable hole (such as: 1 ~ 20 μm, 5 ~ 15 μm, 10 ~ 20 μm etc.) is filtered, concentrated pulpous state sediment forms filter cake, thicken to felicity condition until the absorption of this filter cake, utilize gas pressure official post filter cake to peel off.Filtrate portion delivers to precipitation separation tank 03 recycling after then utilizing pressure differential to be collected by collector.
Rate of cake moisture content containing metal carbonate about 40 ~ 60%, space packaging bag can be carried out send storage or clear tank car loading after collecting, resell to be used as to cement plant and support by the arm adapted material, can be made into the purposes such as Wave-dissipating block, water conservancy construction, secondary road pavement materials, can slightly solubility metal carbonate etc. be locked in construction material, effectively reduce atmospheric carbon dioxide levels collection content.
The above-mentioned isolated by filtration stage preferably can use the program control lautertuns of two more parallels, and uses plug-in strip baiting valve and the filter cake of rotating blanking valve packaging containing metal carbonate.
As mentioned above, the present invention meets patent three important document completely: novelty, creativeness and practicality.With novelty and creativeness, the method for exhaust-gas treatment of the present invention, it is by the integration of program, and then reaches the object that effectively can process waste gas and Footwall drift carbonate; With regard to the utilizability in industry, the method for exhaust-gas treatment of the present invention, when fully meeting the demand of current industry.
The present invention describes with preferred embodiment hereinbefore, but it will be understood by those skilled in the art that this embodiment only for describing the present invention, and should not be read as and limit the scope of the invention.It should be noted, such as with change and the displacement of this embodiment equivalence, all should be set to and be covered by category of the present invention.Therefore, protection scope of the present invention is when being as the criterion of defining with claims.
Claims (12)
1. a method for exhaust-gas treatment, is characterized in that, it comprises:
Alkali cleaning absorb and in conjunction with precipitate phase, use the control valve system of SECO, guide the waste gas for processing by the fluid injection system of multi-direction charging, enter in the washing absorption unit containing alkali lye, form slightly solubility metallic salt precipitation, the solution comparatively clarified on upper strata is separated with solids of sedimentation material through equipment for separating liquid from solid, the solution of this clarification is transmitted back in washing absorption unit with circulating pump, cycling elution has removed the waste gas of acidic materials, the solution of solid portion and small part forms comparatively wet pulpous state sediment, with the first delivery pump, this pulpous state sediment is delivered to precipitation separation tank,
The sedimentation separation stage, this pulpous state sediment is made to enter precipitation separation tank from the top of precipitation separation tank, heavier solid portion is settled down to the bottom land of precipitation separation tank, the solution that upper strata is comparatively clarified flows into clarification liquid bath through equipment for separating liquid from solid, wash absorptive unit recycling through the 3rd delivery pump pressurized delivered back scrubbing again, concentrated pulpous state sediment is sent to program control lautertuns via the second delivery pump; And
The isolated by filtration stage, by concentrated pulpous state sediment through the second delivery pump pressurized delivered extremely program control lautertuns, after chimney filter group is filtered, concentrated pulpous state sediment forms filter cake, thicken to felicity condition until the absorption of this filter cake, utilize gas pressure official post filter cake to peel off, filtrate portion delivers to precipitation separation tank recycling after then utilizing pressure differential to be collected by collector.
2. the method for claim 1, is characterized in that, wherein controls the pH value of alkali lye within the scope of 8 ~ 12.
3. method as claimed in claim 2, is characterized in that, wherein control the pH value of alkali lye within the scope of 10 ~ 12.
4. method as claimed in claim 2, is characterized in that, wherein control the pH value of alkali lye within the scope of 8 ~ 10.
5. method as claimed in claim 2, is characterized in that, wherein control the pH value of alkali lye within the scope of 9 ~ 11.
6. the method for claim 1, is characterized in that, wherein alkali cleaning absorbs and in conjunction with in precipitate phase, uses deentrainment device further, removes the mist removed in the waste gas of acidic materials.
7. the method for claim 1, is characterized in that, wherein alkali cleaning absorb and in conjunction with the washing absorption unit in precipitate phase being use two more parallels.
8. the method for claim 1, is characterized in that, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 1 ~ 20 μm.
9. method as claimed in claim 8, it is characterized in that, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 5 ~ 15 μm.
10. the method for claim 1, is characterized in that, the pore size of the chimney filter group wherein used in the isolated by filtration stage is 10 ~ 20 μm.
11. the method for claim 1, is characterized in that, wherein collect further the filter cake containing metal carbonate, resell to be used as to cement plant and support by the arm adapted material.
12. methods as claimed in claim 11, is characterized in that, wherein use plug-in strip baiting valve and the filter cake of rotating blanking valve packaging containing metal carbonate further.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410474181.1A CN105435607A (en) | 2014-09-17 | 2014-09-17 | Exhaust-gas processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410474181.1A CN105435607A (en) | 2014-09-17 | 2014-09-17 | Exhaust-gas processing method |
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| Publication Number | Publication Date |
|---|---|
| CN105435607A true CN105435607A (en) | 2016-03-30 |
Family
ID=55546504
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813975A (en) * | 2018-08-09 | 2020-02-21 | 上海立得催化剂有限公司 | Magnesium-titanium polyolefin dry powder catalyst disposal system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431618A (en) * | 1982-10-12 | 1984-02-14 | Fmc Corporation | Process control of continuous sodium-limestone flue gas desulfurization system |
| CN102120135A (en) * | 2011-01-24 | 2011-07-13 | 江苏中显集团有限公司 | Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas |
| CN102159300A (en) * | 2008-09-17 | 2011-08-17 | 碳循环有限公司 | Process and plant |
| CN102448581A (en) * | 2009-05-28 | 2012-05-09 | 环境和生物科学大学 | Co2 - capture in molten salts |
-
2014
- 2014-09-17 CN CN201410474181.1A patent/CN105435607A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431618A (en) * | 1982-10-12 | 1984-02-14 | Fmc Corporation | Process control of continuous sodium-limestone flue gas desulfurization system |
| CN102159300A (en) * | 2008-09-17 | 2011-08-17 | 碳循环有限公司 | Process and plant |
| CN102448581A (en) * | 2009-05-28 | 2012-05-09 | 环境和生物科学大学 | Co2 - capture in molten salts |
| CN102120135A (en) * | 2011-01-24 | 2011-07-13 | 江苏中显集团有限公司 | Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813975A (en) * | 2018-08-09 | 2020-02-21 | 上海立得催化剂有限公司 | Magnesium-titanium polyolefin dry powder catalyst disposal system |
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Application publication date: 20160330 |
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