CN102755820A - Synchronous deep purification technology for various pollutants in industrial flue gas - Google Patents
Synchronous deep purification technology for various pollutants in industrial flue gas Download PDFInfo
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- CN102755820A CN102755820A CN2012102808038A CN201210280803A CN102755820A CN 102755820 A CN102755820 A CN 102755820A CN 2012102808038 A CN2012102808038 A CN 2012102808038A CN 201210280803 A CN201210280803 A CN 201210280803A CN 102755820 A CN102755820 A CN 102755820A
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- flue gas
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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
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Abstract
The invention relates to a synchronous deep purification technology for various pollutants in industrial flue gas. The steps include enabling pure water to be subjected to electrolyzation and ultra-violet radiation to generate hydroxyl radicals to be fully mixed with flue gas through a gas mixing device, and oxidizing SO2 and NO which are difficultly soluble in water into S03, NO2, N2O3 and N2O5 which are easily soluble in water; oxidizing high-volatility HgO which is difficultly soluble in water into Hg2+ which is easily soluble in water and easy to be attached to particulate matters; performing oxygenolysis on VOC (volatile organic compounds) and Dioxin to form water and CO2, contacting the oxidation products with water sprays in flue gas to be subjected to dissolving and condensation to form liquid drops, removing micro particles and liquid drops in air flow through a demister, and exhausting purified flue gas into the air through a chimney; and taking collected liquid produced in flue gas demisting, precipitating and filtering, and reusing solid and liquid obtained by separation. The synchronous deep purification technology for various pollutants in industrial flue gas has the advantages that hazardous substances such as SO3, SO2, NOx, Hg, VOC, Dioxin and PM 2.5 in flue gas can be removed simultaneously, collected liquid can be reused, the investment and operation costs are low, and the environmental benefits are good.
Description
Technical field
The invention discloses the synchronous advanced purification technology of the multiple pollutant of a kind of industrial smoke, belong to filed of flue gas purification.
Background technology
Coal burning, waste incineration are the main sources of atmosphere pollution, flue dust, SO that combustion process produces
3, SO
2, NO
x, meeting such as Hg, VOC 、 bioxin, PM2.5 causes severe contamination to atmospheric environment.According to statistics, 2008, China SO
2Discharge capacity is 2321.2 ten thousand tons, and the NO discharge capacity is 2,000 ten thousand tons, and smoke discharge amount is 901.6 ten thousand tons, and emission reduction tasks is very arduous.
At present; Both at home and abroad the flue gases purification method is more, mainly contains the flue gas desulfurization and denitrification technology, the white technology that disappears, captures PM2.5 technology, degraded persistence toxic pollutant technology etc., and these methods are removing to one or more pollutants only all; Removal efficiency is low, and investment and operating cost are high., pollution level heavier flue gas complicated for pollutant component, said method is difficult to reach the purpose of pollutant simultaneous removing, a difficult problem that even if multinomial technology is combined, also can face complex treatment process, be difficult to operate, investment and operating cost significantly increases.
Summary of the invention
The objective of the invention is to above-mentioned prior art problem; The synchronous advanced purification technology of the multiple pollutant of a kind of industrial smoke is proposed; This technology is with relatively reasonable investment; Lower operating cost can realize multiple pollutant simultaneous removing, and is that the qualified discharge that has the treatment facility flue gas now provides powerful guarantee.
The synchronous advanced purification technology of the multiple pollutant of a kind of industrial smoke proposed by the invention is characterized in that having the following steps:
(1) hydroxyl radical free radical that behind electrolysis, ultraviolet irradiation, produces of pure water fully mixes with flue gas through gas mixer, with the SO that wherein is insoluble in water
2Be oxidized to oxide soluble in water, Hg with NO etc.
0Be oxidized to Hg
2+, and be water and CO with the organic pollution oxidation Decomposition
2, material after the oxidation and the water smoke in the flue gas form drop, utilize suitable demister that molecule of carrying secretly in the air-flow and drop are removed then, and flue gas after being purified enters atmosphere through chimney;
The collection liquid that produces during (2) with the flue gas demist takes out, and precipitates, filters, and separates the solid, liquid that obtains and utilizes.
The controlled condition of said pure water electrolysis is: the electric tank cathode material is aluminium, stainless steel or other material that conforms to, and the anode material is platinum, lead, graphite or other material that conforms to, and voltage is 5～100V.
Said ultraviolet irradiation ozone generating hydroxyl radical free radical (O
3/ UV) method is known technology for this area professional and technical personnel.
Said gas mixer can adopt the device of venturi playpipe, gas mixing pump or similar functions, with gas flow 1～4 grade of mixing arrangement can be set, so that make in the flue gas harmful components fully oxidized.
Said demister can select electrostatic precipitator, deflection plate demister, cyclone demister or other to meet the efficient demister of present technique system according to occasion.
Said deposition adopts chemical precipitation method, the Hg that contains that is taking out
2+Collection liquid in add Na
2S, KI or other heavy metal stable pharmaceutical are according to the Hg that measures
2+Concentration with collect the long-pending quality that adds solid of calculating of liquid, generate post precipitation and filter, the thick deposition that obtains is purified and is utilized; Filtrating shows acidity and can be used for dreg control etc.
Hg
2++Na
2S＝2Na
++HgS↓
Hg
2++2KI＝2K
++HgI
2↓
Hydroxyl radical free radical is the extremely strong oxidant of a kind of oxidisability, is only second to fluorine in the occurring in nature oxidisability, can be with the SO that is insoluble in water in the flue gas
2Be oxidized to SO soluble in water with NO
3, NO
2, N
2O
3, N
2O
5High volatile volatile is insoluble in the Hg of water
0Be oxidized to soluble in water and be prone to be attached to the Hg on the particle
2+With VOC with the bioxin oxidation Decomposition is water and CO
2, above-mentioned oxidation product contacts with water smoke in the flue gas and dissolving and cohesion take place and forms drop, utilizes demister that molecule of carrying secretly in the air-flow and drop are removed, and the multiple harmful substances in the flue gas removes simultaneously the most at last.
Beneficial effect:
The invention has the advantages that and utilize a cover flue gas treating process can remove the SO that contains in the flue gas simultaneously
3, SO
2, NO
x, multiple harmful substances such as Hg, VOC 、 bioxin, PM2.5, investment and operating cost are lower, environmental benefit is good.
The hydroxyl radical free radical output that brine electrolysis combines the method for ultraviolet irradiation to obtain is high, and high to the harmful ingredients in flue gas oxidation efficiency, oxidation rate can improve 10-10
4Doubly.Add gas mixer, can change the emitted dose that the hydroxyl hydroxyl radical gas is regulated in interlock, and it is abundant that the oxidation of multistage mixing arrangement assurance flue gas is set, and avoids excessive emissions waste energy simultaneously according to the concentration parameter of flue gas flow and target contaminant.Utilize the demist technology the most at last harmful substance separate with flue gas, can based on the smoke pollution degree with purify to require select corresponding demist technology, to reach the balance of economy, technology and environmental benefit.Collect the thick deposition that liquid obtains after deposition, filtration, can realize the utilization again of Hg, like HgS (cinnabar) the detoxifcation antisepsis is arranged, external application can suppress or kill skin bacterium and parasite; HgI
2Can be used for raw material that disposes by Na Shi reagent etc.Acid solution can be used for dreg control etc.
Description of drawings
Fig. 1 is a process chart of the present invention
The specific embodiment
Embodiment 1
Each pollutant load: SO in the simulated flue gas
x: 448.53mg/m
3, NO
x: 369.81mg/m
3, Hg:0.862mg/m
3, VOC (in toluene): 76.55mg/m
3、 bioxin: 5.238ng I-TEQ/Nm
3, PM2.5:3874.34mg/m
3, the flue gas purification system inlet flow rate is set at 6000～8000m
3/ h, flue-gas temperature: 140～160 ℃, handling duration 1～3h.
The electrolysis pure water carries out in the sealed electrolytic cell of 25L, and the negative electrode material is an aluminium, and the anode material is a platinum, and voltage 100v cooperates 2 of 254nm uviol lamps, light intensity 9200 μ W/cm
2Electrolytic cell connects the venturi playpipe, its throat location subtend flue gas come to, with flue gas flow direction 3 grades of venturi playpipes are set.Flue gas entering static demister system after the oxidation, flue gas after being purified are measured wherein, and pollutant load is SO
x: 6.37mg/m
3, NO
x: 0.94mg/m
3, Hg:6.23 * 10
-4Mg/m
3, VOC (in toluene): 1.37mg/m
3、 bioxin: 0.008ng I-TEQ/Nm
3, PM2.5:3.12mg/m
3
To collect liquid at last and take out, according to the Hg that measures
2+Concentration is calculated with collection liquid cumulative volume should add Na
2The about 4.73g of S solid, the back that reacts completely is filtered and is obtained thick HgS deposition 16.65g.Solution pH value 5.6.
Embodiment 2
Each pollutant load: SO in the simulated flue gas
x: 1500mg/m
3, NO
x: 387.26mg/m
3, Hg:0.483mg/m
3, VOC (in toluene): 46.67mg/m
3、 bioxin: 2.135ng I-TEQ/Nm
3, particle: 3248.83mg/m
3, flue gas flow is set at 6000～8000m
3/ h, flue-gas temperature: 140～160 ℃, handling duration 1～3h.
The electrolysis pure water carries out in the sealed electrolytic cell of 25L, and the negative electrode material is a stainless steel, and the anode material is plumbous, and voltage 50v cooperates 2 of 254nm uviol lamps, light intensity 9200 μ W/cm
2Electrolytic cell connects the venturi playpipe, its throat location subtend flue gas come to, with flue gas flow direction 1 grade of venturi playpipe is set.Flue gas entering deflection plate demister system after the oxidation, flue gas after being purified are measured wherein, and pollutant load is SO
x: 90.48mg/m
3, NO
x: 6.25mg/m
3, Hg:5.42 * 10
-4Mg/m
3, VOC (in toluene): 1.47mg/m
3、 bioxin: 0.015I-TEQ/Nm
3, particle: 28.67mg/m
3
To collect liquid at last and take out, according to the Hg that measures
2+Concentration is calculated with collection liquid cumulative volume should add the about 12.64g of KI solid, filters and obtains thick HgI
2Deposition 17.54g.Solution pH value 5.3.
Embodiment 3
Each pollutant load: SO in the simulated flue gas
x: 188.23mg/m
3, NO
x: 318.26mg/m
3, Hg:0.318mg/m
3, VOC (in toluene): 20.58mg/m
3、 bioxin: 1.311ng I-TEQ/Nm
3, particle: 2984.36mg/m
3, flue gas flow is set at 4000～6000m
3/ h, flue-gas temperature: 90 ℃, handling duration 1～3h.
The electrolysis pure water carries out in the sealed electrolytic cell of 25L, and the negative electrode material is an aluminium, and the anode material is a graphite, and voltage 10v cooperates 2 of 254nm uviol lamps, light intensity 9200 μ W/cm
2Electrolytic cell connects gas mixer, with flue gas flow direction 2 grades of gas mixers is set.Flue gas entering whirlwind demister system after the oxidation, flue gas after being purified are measured wherein, and pollutant load is SO
x: 18.69mg/m
3, NO
x: 20.14mg/m
3, Hg:0.052mg/m
3, VOC (in toluene): 1.86mg/m
3、 bioxin: 0.158ng I-TEQ/Nm
3, particle: 10.24mg/m
3
To collect liquid at last and take out, according to the Hg that measures
2+Concentration is calculated with collection liquid cumulative volume should add Na
2The about 1.38g of S solid filters and obtains thick HgS deposition 6.39g.Solution pH value 6.2.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. synchronous advanced purification technology of the multiple pollutant of industrial smoke is characterized in that having the following steps:
(1) hydroxyl radical free radical that behind electrolysis, ultraviolet irradiation, produces of pure water fully mixes with flue gas through gas mixer, with the SO that wherein is insoluble in water
2Be oxidized to oxide soluble in water, Hg with NO etc.
0Be oxidized to Hg
2+, and be water and CO with the organic pollution oxidation Decomposition
2, above-mentioned oxidation product contacts with water smoke in the flue gas and dissolving and cohesion take place and forms drop, utilizes suitable demister that molecule of carrying secretly in the air-flow and drop are removed then, and flue gas after being purified enters atmosphere through chimney;
The collection liquid that produces during (2) with the flue gas demist takes out, and precipitates, filters, and separates the solid, liquid that obtains and utilizes.
2. according to the synchronous advanced purification technology of the multiple pollutant of the said industrial smoke of claim 1; It is characterized in that: the controlled condition of pure water electrolysis is: the electric tank cathode material is aluminium, stainless steel or other material that conforms to; The anode material is platinum, lead, graphite or other material that conforms to, and voltage is 5～100V.
3. according to the synchronous advanced purification technology of the multiple pollutant of the said industrial smoke of claim 1, it is characterized in that: gas mixer can adopt the device of venturi playpipe, gas mixing pump or similar functions, with gas flow 1～4 grade of mixing arrangement can be set.
4. according to the synchronous advanced purification technology of the multiple pollutant of the said industrial smoke of claim 1, it is characterized in that: demister can select electrostatic precipitator, deflection plate demister, cyclone demister or other to meet the efficient demister of present technique system according to occasion.
5. according to the synchronous advanced purification technology of the multiple pollutant of the said industrial smoke of claim 1, it is characterized in that: deposition adopts chemical precipitation method, the Hg that contains that is taking out
2+Collection liquid in add Na
2S, KI or other heavy metal stable pharmaceutical are slightly precipitated, and utilize after filtering, purifying again.
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|---|---|---|---|
| CN2012102808038A CN102755820A (en) | 2012-08-09 | 2012-08-09 | Synchronous deep purification technology for various pollutants in industrial flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102808038A CN102755820A (en) | 2012-08-09 | 2012-08-09 | Synchronous deep purification technology for various pollutants in industrial flue gas |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657375A (en) * | 2014-01-07 | 2014-03-26 | 上海科洋科技股份有限公司 | Method and system for removing trace SO2 in tail gas by gas phase oxidation |
| CN105056741A (en) * | 2015-08-27 | 2015-11-18 | 北京市环境保护科学研究院 | Method and device for reduction absorption treatment of pollutants in natural gas boiler smoke |
| CN105498490A (en) * | 2015-11-30 | 2016-04-20 | 大连海事大学 | Seawater electrolysis and ultraviolet radiation integrated marine exhaust multi-pollutants comprehensive treatment method and device thereof |
| CN105582868A (en) * | 2015-06-05 | 2016-05-18 | 上海昊深环保科技有限公司 | Method for generating hydroxyl free radicals and method for treating industrial waste gas |
| CN105727725A (en) * | 2016-04-18 | 2016-07-06 | 江苏大学 | Method and device for removing VOCs from photoelectrolysis induced free radicals |
| CN105833676A (en) * | 2016-04-18 | 2016-08-10 | 江苏大学 | Method and device for removing VOCs (Volatile Organic Compounds) in waste gas by light radiation on chlorine atoms and hydroxyl |
| CN106000014A (en) * | 2016-08-09 | 2016-10-12 | 顾志龙 | Multifunctional superimposed flue gas deep purification system |
| CN106110847A (en) * | 2016-04-18 | 2016-11-16 | 江苏大学 | A kind of method and device of photodissociation hypochlorous acid simultaneous SO_2 and NO removal demercuration |
| CN106166438A (en) * | 2016-04-18 | 2016-11-30 | 江苏大学 | A kind of method and device of photodissociation chlorine aqueous solution induced radical removing hydrogen sulfide |
| CN106215644A (en) * | 2016-04-18 | 2016-12-14 | 江苏大学 | A kind of method and device of photoelectrolysis induced radical removing hydrogen sulfide |
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| US6649132B1 (en) * | 2002-07-23 | 2003-11-18 | The Boc Group, Inc. | Process for the removal of impurities from gas streams |
| CN102166471A (en) * | 2011-02-25 | 2011-08-31 | 东南大学 | Heterogeneous-Photo-Fenton-based integrated smoke gas purification system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6649132B1 (en) * | 2002-07-23 | 2003-11-18 | The Boc Group, Inc. | Process for the removal of impurities from gas streams |
| CN202006084U (en) * | 2010-12-24 | 2011-10-12 | 韩伟 | Garbage incinerator and dioxin decomposition remover |
| CN102166471A (en) * | 2011-02-25 | 2011-08-31 | 东南大学 | Heterogeneous-Photo-Fenton-based integrated smoke gas purification system |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657375A (en) * | 2014-01-07 | 2014-03-26 | 上海科洋科技股份有限公司 | Method and system for removing trace SO2 in tail gas by gas phase oxidation |
| CN105582868A (en) * | 2015-06-05 | 2016-05-18 | 上海昊深环保科技有限公司 | Method for generating hydroxyl free radicals and method for treating industrial waste gas |
| CN105056741A (en) * | 2015-08-27 | 2015-11-18 | 北京市环境保护科学研究院 | Method and device for reduction absorption treatment of pollutants in natural gas boiler smoke |
| CN105498490A (en) * | 2015-11-30 | 2016-04-20 | 大连海事大学 | Seawater electrolysis and ultraviolet radiation integrated marine exhaust multi-pollutants comprehensive treatment method and device thereof |
| CN105498490B (en) * | 2015-11-30 | 2018-01-09 | 大连海事大学 | The marine exhaust multi-pollutant integrated conduct method and device that a kind of electrolytic seawater integrates with ultraviolet irradiation |
| CN106166438A (en) * | 2016-04-18 | 2016-11-30 | 江苏大学 | A kind of method and device of photodissociation chlorine aqueous solution induced radical removing hydrogen sulfide |
| CN106110847A (en) * | 2016-04-18 | 2016-11-16 | 江苏大学 | A kind of method and device of photodissociation hypochlorous acid simultaneous SO_2 and NO removal demercuration |
| CN105833676A (en) * | 2016-04-18 | 2016-08-10 | 江苏大学 | Method and device for removing VOCs (Volatile Organic Compounds) in waste gas by light radiation on chlorine atoms and hydroxyl |
| CN106215644A (en) * | 2016-04-18 | 2016-12-14 | 江苏大学 | A kind of method and device of photoelectrolysis induced radical removing hydrogen sulfide |
| CN105727725A (en) * | 2016-04-18 | 2016-07-06 | 江苏大学 | Method and device for removing VOCs from photoelectrolysis induced free radicals |
| CN105727725B (en) * | 2016-04-18 | 2018-08-21 | 江苏大学 | A kind of photoelectrolysis induced radical takes off the method and device of VOCs |
| CN105833676B (en) * | 2016-04-18 | 2018-11-06 | 江苏大学 | The method and device of VOCs in a kind of light radiation chlorine atom and hydroxyl removing exhaust gas |
| CN106110847B (en) * | 2016-04-18 | 2018-12-14 | 江苏大学 | A kind of method and device of photodissociation hypochlorous acid simultaneous SO_2 and NO removal demercuration |
| CN106166438B (en) * | 2016-04-18 | 2018-12-14 | 江苏大学 | A kind of method and device of photodissociation chlorine aqueous solution induced radical removing hydrogen sulfide |
| CN106215644B (en) * | 2016-04-18 | 2019-01-08 | 江苏大学 | A kind of method and device of photoelectrolysis induced radical removing hydrogen sulfide |
| CN106000014A (en) * | 2016-08-09 | 2016-10-12 | 顾志龙 | Multifunctional superimposed flue gas deep purification system |
| CN106000014B (en) * | 2016-08-09 | 2019-02-15 | 顾志龙 | Multi-functional superposition flue gas advanced purification system |
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Application publication date: 20121031 |