CN113952837A - Method for treating industrial waste gas by using strong oxidation microbubble spray tower - Google Patents
Method for treating industrial waste gas by using strong oxidation microbubble spray tower Download PDFInfo
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- CN113952837A CN113952837A CN202111390357.1A CN202111390357A CN113952837A CN 113952837 A CN113952837 A CN 113952837A CN 202111390357 A CN202111390357 A CN 202111390357A CN 113952837 A CN113952837 A CN 113952837A
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- 239000007789 gas Substances 0.000 title claims abstract description 71
- 239000002440 industrial waste Substances 0.000 title claims abstract description 50
- 239000007921 spray Substances 0.000 title claims abstract description 30
- 230000003647 oxidation Effects 0.000 title claims abstract description 27
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001590 oxidative effect Effects 0.000 claims abstract description 27
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 26
- 231100000719 pollutant Toxicity 0.000 claims abstract description 26
- 229910001868 water Inorganic materials 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 21
- 239000003814 drug Substances 0.000 claims description 20
- 239000007800 oxidant agent Substances 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 15
- 239000003054 catalyst Substances 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 6
- 150000002505 iron Chemical class 0.000 claims description 3
- HDMGAZBPFLDBCX-UHFFFAOYSA-M potassium;sulfooxy sulfate Chemical compound [K+].OS(=O)(=O)OOS([O-])(=O)=O HDMGAZBPFLDBCX-UHFFFAOYSA-M 0.000 claims description 3
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- 239000000126 substance Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- -1 hydroxyl radicals Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
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- 230000009471 action Effects 0.000 description 2
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- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 238000006479 redox reaction Methods 0.000 description 2
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- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
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- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
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- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 230000008034 disappearance Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000010805 inorganic waste Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/485—Sulfur compounds containing only one sulfur compound other than sulfur oxides or hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of industrial waste gas treatment, and aims to provide a method for treating industrial waste gas by using a strong oxidation microbubble spray tower; compared with the prior art, the invention has the advantages of remarkable progress, realization of capturing, oxidizing and decomposing industrial waste gas pollutants in one step in the strong oxidation microbubble spray tower, simple and convenient operation, low operation cost, high treatment effect and no secondary pollution.
Description
Technical Field
The invention relates to the technical field of industrial waste gas treatment, in particular to a method for treating industrial waste gas by using a strong oxidation microbubble spray tower.
Background
Industrial waste gases include organic waste gases and inorganic waste gases. The organic waste gas mainly comprises various hydrocarbons, alcohols, aldehydes, acids, ketones, amines and the like; the inorganic exhaust gas mainly includes sulfur oxides, nitrogen oxides, carbon oxides, halogens and compounds thereof, and further, industrial dust and the like. In the aspect of treating industrial waste gas, the traditional spray tower sucks collected industrial waste gas into the spray tower through a fan unit, the collected industrial waste gas flows through a packed layer section (a medium for gas/liquid contact reaction), the waste gas is fully contacted with spray liquid flowing on the surface of a packing to adsorb dust, acidic and alkaline dirt or water-soluble pollutants contained in the waste gas, and then the cleaned gas is separated from the polluted liquid to achieve the purpose of cleaning air.
The traditional spray tower only transfers pollutants in industrial waste gas from a gas phase to a liquid phase, and has the defects that the accumulated concentration of the polluted spray liquid is increased day by day, and the liquid phase pollutants are transferred to the gas phase again, so that the effect of the spray tower is reduced; and secondly, the conventional spraying technology has low pollutant capturing efficiency and low treatment effect, can be applied to production practice only as an auxiliary technology, and generates secondary pollution.
Therefore, it is necessary to research a strong oxidation microbubble spray tower suitable for industrial waste gas treatment, improve the capture and oxidative decomposition treatment of pollutants, reach the standard for low-concentration industrial waste gas treatment in one step and avoid secondary pollution.
Disclosure of Invention
The invention aims to provide a method for treating industrial waste gas by a strong oxidation microbubble spray tower, which can complete the capture and the oxidative decomposition of industrial waste gas pollutants in one step in the tower, and has the advantages of simple and convenient operation, simple process, low operation cost, high treatment effect and no secondary pollution.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for treating industrial waste gas by a strong oxidation microbubble spray tower comprises the following steps:
(1) mixing a composite strong oxidant, a catalyst and circulating water, pressurizing by a steam-water mixing pump to generate micro bubbles, and introducing the micro bubbles into the bottom of a strong oxidation micro bubble spraying tower;
(2) simultaneously, the industrial waste gas is sucked into the bottom of the strong oxidation micro-bubble spraying tower;
(3) and (3) carrying out oxidative decomposition on pollutants in the industrial waste gas in the micro-bubble spray tower, detecting the relative humidity of the treated waste gas, and discharging the qualified waste gas to the environment.
Optionally, the composite strong oxidant in the step (1) is prepared by proportionally combining hydrogen peroxide, elemental potassium hydrogen persulfate and silicone oil.
Optionally, the catalyst in step (1) is an iron salt.
Optionally, the exhaust gas in the step (3) is qualified when the relative humidity of the exhaust gas is lower than 8%.
Optionally, the strong oxidation microbubble spray tower includes: the system comprises a tower body for strongly oxidizing pollutants in the micro-bubbles to decompose industrial waste gas, a circulating water tank for storing circulating water flowing back from the tower body, a medicine storage tank for storing the composite strong oxidant and the catalyst, a medicine suction distributor for sucking the composite strong oxidant and the catalyst from the medicine storage tank in proportion, a mixing pump for mixing the composite strong oxidant and the catalyst in the medicine suction distributor with the circulating water in the circulating water tank, a mixing tank for generating a large amount of strongly oxidized micro-bubbles from a mixture in the mixing pump, and an induced draft fan for introducing the industrial waste gas into the tower body; a second packing layer for providing mass transfer places for pollutants in the industrial waste gas, a second gas distributor for enabling circulating liquid to uniformly spray on the second packing layer, a first packing layer for providing mass transfer places for the pollutants in the industrial waste gas, a first gas distributor for enabling the circulating liquid to uniformly spray on the first packing layer, a first demisting layer for removing moisture in the treated industrial waste gas and a second demisting layer for removing moisture in the treated industrial waste gas are arranged in the tower body from bottom to top at intervals; one end of the circulating water tank is communicated with one end of the mixing pump, and the other end of the circulating water tank is communicated with the bottom of the tower body; one end of the medicine suction distributor is communicated with the medicine storage tank, and the other end of the medicine suction distributor is communicated with one end of the mixing pump; one end of the mixing tank is communicated with the other end of the mixing pump, and the other end of the mixing tank is communicated with the middle part of the tower body; and the induced draft fan is communicated with the bottom of the tower body.
Optionally, the first packing layer and the second packing layer are both composed of hollow spheres.
Most of VOCs in industrial waste gas can be oxidized, and the final products are carbon dioxide and water; while inorganic pollutants in the industrial waste gas can be thoroughly oxidized and decomposed into harmless substances by the oxidant.
Under the catalysis of iron salt, the composite strong oxidant initiates a chain reaction to generate high-activity micromolecular free radicals, nascent atomic oxygen, oxygen free radicals, hydroxyl free radicals (. OH) and sulfate free radicals (SO)4Etc.) with VOCs to produce CO2And H2And O, thereby realizing the oxidation, decomposition and removal of industrial waste gas pollutants.
The silicone oil is not easy to volatilize and is not soluble in water, but is mutually soluble with methanol, glycol, ethoxyethanol, benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride and kerosene, and acetone, ethanol and dioxin are also slightly soluble in the silicone oil. Therefore, the silicone oil is a good solvent for a plurality of VOCs substances, and is beneficial to oxidative decomposition of the solute by the composite strong oxidant.
For example: reaction with hydrogen sulfide, the products are water and elemental sulfur: h2O2+H2S＝2H2O+S；
Reaction with methyl mercaptan, the products are water and methanesulfonic acid: CH (CH)3SH+3H2O2＝CH3SO3H+3H2O；
Reaction with methanol, the products being water, carbon dioxide and hydrogen: CH (CH)30H+H202＝C02+H2O+2H2；
Reaction with an alcohol and a ketone, RR 'CH-00H ═ RR' CHO +. OH, RR 'CH0 + RH ═ RR' CH0H + R;
reaction with nitrophenylacetate:
phenol is oxidized into hydroquinone or catechol under the action of OH; then, the oxidation is continued to obtain quinone compounds, and then the ring is opened to form fatty acid (such as butenedioic acid and acetic acid), and finally the fatty acid is degraded into carbon dioxide and water, wherein the reaction process is as follows:
the improved mixing pump generates microbubbles with larger specific surface activity in high-speed pressurizing operation, the specific surface area is large, and the capture capacity of the improved mixing pump on gas pollutants is improved; the micro bubbles generate hydroxyl radicals (. OH) at the same time, the oxidation capacity is enhanced, stronger oxygen-enriched micro bubbles are formed with the absorbed composite strong oxidant, and the bubble collapse effect of the micro bubbles can also break carbon chains of pollutants, namely, the pollutants in the industrial waste gas are oxidized by the physical (hydraulic shearing) and chemical synergistic effect.
At the moment of micro-bubble breakage, high-concentration ions accumulated on the interface release accumulated chemical energy at a moment due to the violent change of disappearance of the gas-liquid interface, and at the moment, a large amount of hydroxyl radicals can be generated through excitation. The hydroxyl free radical has ultrahigh oxidation-reduction potential, the generated super-strong oxidation can degrade pollutants such as phenol and the like which are difficult to oxidize and decompose under normal conditions in water, and the decomposition rate of organic matters such as p-toluene, xylene, butyl acetate, acetone, isopropanol, tetrachloroethylene and the like can reach more than 90%.
A negative pressure section of the mixing pump is provided with a medicine suction distributor, and the medicine suction distributor sucks the proportional composite strong oxidant and the catalyst while sucking air at negative pressure when sucking and spraying circulating water; the catalytic reaction is instantly completed in the mixing tank and is mixed with the circulating water to carry out the oxidation-reduction reaction to decompose the pollutants in the industrial waste gas.
A double-layer gas distributor is arranged in the strong oxidation microbubble spray tower to capture pollutants and rapidly oxidize and decompose the pollutants.
The double-layer packing layer is arranged in the strong oxidation microbubble spray tower, so that the gas-liquid mass transfer effect is enhanced, and the strong oxidation performance is further improved.
The top of the strong oxidation micro-bubble spraying tower is provided with a double-layer demisting layer, so that the water mist is prevented from drifting.
Compared with the prior art, the invention has the following advantages: the method completes the capture and the oxidative decomposition of the industrial waste gas pollutants in one step in the strong oxidation microbubble spray tower, and has the advantages of simple and convenient operation, low operation cost, high treatment effect and no secondary pollution.
Drawings
Fig. 1 is a schematic diagram of a strong oxidizing microbubble spray tower.
In the figure: 1. a tower body; 11. a second packing layer; 12. a second gas distributor; 13. a first filler layer; 14. a first gas distributor; 15. a first defogging layer; 16. a second defogging layer; 2. a mixing tank; 3. a mixing pump; 4. a drug-sucking dispenser; 5. a medicine storage tank; 6. and a circulating water tank.
Detailed Description
The invention is further described below with reference to the drawings and examples, but the scope of the invention as claimed is not limited to the scope of the examples.
A method for treating industrial waste gas by a strong oxidation microbubble spray tower comprises the following steps:
(1) adding 20-25 KG of hydrogen peroxide, 3-5 KG of elemental potassium hydrogen persulfate, 2-4 KG of silicone oil and 0.15-0.25 KG of ferric sulfate into the medicine storage tank 5, and uniformly stirring; adding 50-55L of tap water into the circulating water tank 6; the medicine suction distributor 4 and the mixing pump 3 are started in sequence; the composite strong oxidant and the catalyst in the medicine suction distributor 4 are mixed with tap water according to a certain flow rate proportion, enter the mixing pump 3, are uniformly mixed under the action of high-speed pressurization of the mixing pump 3 to form circulating liquid, and generate micro bubbles which are electrostatic, have large specific surface and are rich in various oxidation groups; the micro bubbles further complete catalytic reaction instantly in the mixing tank 2, and the micro bubbles in the mixing tank 2 have super strong oxidizability; the circulating liquid and the strong oxidizing micro-bubbles are further conveyed to the interior of the tower body 1 through a pipeline.
(2) And meanwhile, the draught fan 7 is started, the pressure difference is generated after the draught fan 7 is started, and the industrial waste gas quickly passes through the blades of the draught fan 7 and enters the bottom of the tower body 1.
(3) Circulating liquid and strong oxidizing micro-bubbles entering the tower body 1 are sprayed out by a hollow cone of an atomizing nozzle in a crossed manner and fall on a first gas distributor 14, the first gas distributor 14 enables circulating water containing the strong oxidizing micro-bubbles to be atomized uniformly and then fall on a first filler layer 13 consisting of hollow spheres; when the circulating liquid flows downwards along the first filler layer 13, strong oxidizing microbubbles are sometimes generated to eliminate condensed water, so that a wall flow effect is generated, and the gas-liquid two phases are unevenly distributed in the first filler layer 13 due to the wall flow effect, so that the mass transfer efficiency is reduced; the circulating liquid which generates the wall flow effect is redistributed by the second gas distributor 12 and then is sprayed on the second filler layer 11; the circulating liquid flows down along the second packing layer 11 to the bottom of the tower body 1 and then flows back to the circulating water tank 6 through a conveying pipeline.
The industrial waste gas entering the bottom of the tower body 1 is subjected to gas-liquid (circulating liquid and strong oxidation microbubbles) two-phase intimate contact mass transfer at the second filler layer 11, and pollutants in the industrial waste gas are captured and oxidized and decomposed; the pollutants in the industrial waste gas are subjected to gas-liquid mass transfer through the first filler layer 13, and further subjected to oxidation-reduction reaction; the treated industrial waste gas sequentially passes through a first demisting layer 15 and a second demisting layer 16 on the top of the tower body 1 to remove water mist; and the relative humidity of the treated industrial waste gas is detected to be less than 8%, and then the industrial waste gas is discharged into the environment through an exhaust pipe at the top of the tower body 1.
In addition, in order to ensure the strong oxidation effect of the circulating liquid, a composite strong oxidant and a catalyst need to be supplemented at regular time.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A method for treating industrial waste gas by a strong oxidation microbubble spray tower is characterized by comprising the following steps:
(1) mixing a composite strong oxidant, a catalyst and circulating water, pressurizing by a steam-water mixing pump to generate micro bubbles, and introducing the micro bubbles into the bottom of a strong oxidation micro bubble spraying tower;
(2) simultaneously, the industrial waste gas is sucked into the bottom of the strong oxidation micro-bubble spraying tower;
(3) and (3) carrying out oxidative decomposition on pollutants in the industrial waste gas in the micro-bubble spray tower, detecting the relative humidity of the treated waste gas, and discharging the qualified waste gas to the environment.
2. The method for treating industrial waste gas by using a strong oxidizing microbubble spray tower as claimed in claim 1, wherein the composite strong oxidizing agent in the step (1) is prepared by proportionally combining hydrogen peroxide, elemental potassium hydrogen persulfate and silicone oil.
3. The method for treating industrial waste gas by using a strong oxidizing microbubble spray tower as claimed in claim 1, wherein the catalyst in the step (1) is iron salt.
4. The method of claim 1, wherein the flue gas in step (3) is qualified when the relative humidity is lower than 8%.
5. The method of claim 1, wherein the strong oxidizing microbubble spray tower comprises: the system comprises a tower body for strongly oxidizing pollutants in the micro-bubbles to decompose industrial waste gas, a circulating water tank for storing circulating water flowing back from the tower body, a medicine storage tank for storing the composite strong oxidant and the catalyst, a medicine suction distributor for sucking the composite strong oxidant and the catalyst from the medicine storage tank in proportion, a mixing pump for mixing the composite strong oxidant and the catalyst in the medicine suction distributor with the circulating water in the circulating water tank, a mixing tank for generating a large amount of strongly oxidized micro-bubbles from a mixture in the mixing pump, and an induced draft fan for introducing the industrial waste gas into the tower body; a second packing layer for providing mass transfer places for pollutants in the industrial waste gas, a second gas distributor for enabling circulating liquid to uniformly spray on the second packing layer, a first packing layer for providing mass transfer places for the pollutants in the industrial waste gas, a first gas distributor for enabling the circulating liquid to uniformly spray on the first packing layer, a first demisting layer for removing moisture in the treated industrial waste gas and a second demisting layer for removing moisture in the treated industrial waste gas are arranged in the tower body from bottom to top at intervals; one end of the circulating water tank is communicated with one end of the mixing pump, and the other end of the circulating water tank is communicated with the bottom of the tower body; one end of the medicine suction distributor is communicated with the medicine storage tank, and the other end of the medicine suction distributor is communicated with one end of the mixing pump; one end of the mixing tank is communicated with the other end of the mixing pump, and the other end of the mixing tank is communicated with the middle part of the tower body; and the induced draft fan is communicated with the bottom of the tower body.
6. The method of claim 5, wherein the first and second packing layers are hollow spheres.
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