CN103908886B - A kind of employing zinc oxide paste liquid sulfur method containing additive - Google Patents
A kind of employing zinc oxide paste liquid sulfur method containing additive Download PDFInfo
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- CN103908886B CN103908886B CN201410134961.1A CN201410134961A CN103908886B CN 103908886 B CN103908886 B CN 103908886B CN 201410134961 A CN201410134961 A CN 201410134961A CN 103908886 B CN103908886 B CN 103908886B
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Abstract
A kind of method that the present invention relates to zinc oxide paste loss of thick fluid sulfur used containing the additive being mixed into by alkanolamine, inorganic salt and surfactant, comprises the steps: first water, zinc oxide to be mixed and made into zinc oxide serosity；Then alkanolamine, inorganic salt and surfactant are mixed into zinc oxide paste solution additive；Additive is added in zinc oxide serosity zinc oxide serosity again that make containing additive and puts into serum recycle pond；Pending gas containing sulfur dioxide is passed through booster fan pressurization；Gas after pressurization being entered absorption tower bottom, with from absorbing the zinc oxide slurry reaction and sulfur dioxide absorption that tower top sprays downwards, sloughs the gas after sulfur dioxide and discharged by top, absorption tower, the zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.The inventive method is simple, and low cost, sulfur dioxide good absorbing effect, zinc oxide paste fluid viscosity is low, pollution-free, has saved resource, improves economic benefit.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of zinc oxide paste liquid sulfur method used containing the additive being mixed into by alkanolamine, inorganic salt and surfactant.
Background technology
Sulfur dioxide, as one of the predominant gas of atmospheric pollution, has caused the extensive concern of people.Flue gas desulfurization is the effective ways reducing sulphur emissions, countries in the world begin one's study from the 1950's desulfurization technology, so far desulfurization technology has reached kind more than 200, and main method has the multiple sulfur removal technologies such as wet desulphurization, semi-dry desulphurization, dry desulfurization, rotary spraying and drying method desulfurization, E-beam absorption.Use more generally limestone/lime method, sodium alkali, renewable solvent absorption cycle and ammonia process the most both at home and abroad.
But for Lead And Zinc Smelter, these methods exist raw material sources be difficult to, side-product dispose difficulty or processing cost cross height etc. problem.
Zinc oxide method is a kind of sulfur method for zinc abstraction factory flue gas, flue dust, waste residue and waste electrolyte that its raw material oxide powder and zinc can utilize zinc metallurgical process to produce prepare, for absorbing the sulfur dioxide gas in flue gas, generating product is zinc sulfite solid, zinc sulfate liquid or zinc sulfate solid.Zinc sulfite solid can be decomposed into zinc oxide and sulfur dioxide by heat resolve or acid, and zinc oxide returns and does absorbent, and sulfur dioxide can produce sulphuric acid or sulfur dioxide liquid processed；Also by oxidizing process, zinc sulfite can be oxidized to solvable zinc sulfate, zinc sulfate liquid or the zinc sulfate solid obtained by evaporative crystallization and all can return to smelting shop re-using.As can be seen here, sulfur removal technology is combined closely by this technology with original smelting process, absorbent uses the flue dust containing zinc oxide in factory, waste residue and waste electrolyte, the solution of zinc sulfate produced, solid slag etc. all can return to factory internal phase close workshop again with, well solve the source of absorbent and the process problem of product, reach the maximization of the utilization of resources, decrease circulating fund, reduce operating cost, but it is poor to find that in actual application the method exists assimilation effect, zinc oxide paste fluid viscosity is big, the problems such as easy blocking, not only absorb and not exclusively may proceed to cause environmental pollution, the most also can affect normal production.
Summary of the invention
For solving above-mentioned technical problem, the invention provides and a kind of use, good absorbing effect low containing the additive, the viscosity that are mixed into by alkanolamine, inorganic salt and surfactant, be not easy that blocking, energy consumption be little, the zinc oxide paste liquid sulfur method of low cost.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of employing zinc oxide paste liquid sulfur method containing additive, comprises the following steps:
(1) water, zinc oxide are mixed and made into zinc oxide serosity；
(2) alkanolamine, inorganic salt and surfactant are mixed into zinc oxide paste solution additive；
(3) additive of step (2) gained is added in the zinc oxide serosity of step (1) and make the zinc oxide serosity containing additive, and it is standby that the zinc oxide serosity containing additive is put into serum recycle pond；
(4) the pending gas containing sulfur dioxide being passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the pending gas after pressurization enters the bottom on the absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serosity, the pH value making absorption tower internal oxidition zinc serosity is 2.2-5.2, slough the gas after sulfur dioxide to be discharged by top, absorption tower, zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
In described step (1), in zinc oxide serosity, the weight percentage of zinc oxide is 35%-75%.
In described step (2), alkanolamine, inorganic salt, the part by weight of surfactant are (1-2): (0.2-0.5): (0.5-1.5).
Described alkanolamine is one or both combination of triethanolamine or 2-amino-2-methyl-1-propanol.
Described inorganic salt is one or both combination of calcium chloride or sodium chloride.
Described surfactant is the combination of one or more in dodecylbenzene sodium sulfonate, Tween 80, PEG 20000.
The weight of the mixture being made up of alkanolamine, inorganic salt and surfactant added in zinc oxide serosity in described step (3) accounts for the 0.05%-0.5% of zinc oxide serosity gross weight.
After using technique scheme, the present invention reaches to provide the benefit that:
(1) add to after alkanolamine of the present invention, inorganic salt and surfactant mixing zinc oxide serosity adds contacting of flue gas and zinc oxide serosity, make the oxidized zinc serosity of the sulfur dioxide in flue gas fully absorb, thus reach the purpose of thorough desulfurization；
(2) present invention reduces the viscosity of zinc oxide serosity by adding the additive being made up of alkanolamine, inorganic salt and surfactant in zinc oxide serosity, decreases sedimentation, significantly improve zinc oxide paste liquid stream and move, it is to avoid the phenomenons such as blocking.
Therefore, the inventive method is simple, pollution-free, low cost, the zinc oxide serosity simultaneously containing the additive being made up of alkanolamine, inorganic salt and surfactant can significantly improve the assimilation effect of sulfur dioxide, reduces zinc oxide paste fluid viscosity, avoid the blocking in production process, further reduce pollution, saved resource, improve economic benefit.
Detailed description of the invention
The invention will be further described by the following examples, its purpose is to be more fully understood that present disclosure, but it is not limiting as protection scope of the present invention.
Embodiment
1
(1) first water is mixed and made into zinc oxide serosity with zinc oxide by weight the ratio for 1:1；
(2) triethanolamine (TEA), sodium chloride (NaCl), Tween 80 are mixed and made into additive in the ratio of 1.2:0.4:0.5；
(3) additive being made up of triethanolamine (TEA), sodium chloride (NaCl), Tween 80 is added in the ratio of the 0.2% of zinc oxide serosity gross weight the flue gas desulfurization zinc oxide serosity made in zinc oxide serosity containing the additive being made up of triethanolamine (TEA), sodium chloride (NaCl), Tween 80, and the zinc oxide serosity containing additive is put into serum recycle pond；
(4) by zinc abstraction factory containing SO2Concentration is 12000 mg/m3Flue gas be passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the zinc abstraction factory after pressurization is containing SO2Concentration is 12000 mg/m3Flue gas enter the bottom on absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serum recycle pond, the pH value making absorption tower internal oxidition zinc serosity is 2.2, slough the gas after sulfur dioxide to be discharged by top, absorption tower, after testing, SO in the gas after desulfurization2Content is 450 mg/m3, the zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
Embodiment 2
(1) first water is mixed and made into zinc oxide serosity with zinc oxide by weight the ratio for 1:0.54；
(2) by triethanolamine (TEA), calcium chloride (CaCl2), PEG 20000 be mixed and made into additive in the ratio of 2:0:5: 1.5；
(3) will be by triethanolamine (TEA), calcium chloride (CaCl2), the additive made of PEG 20000 added in zinc oxide serosity in the ratio of the 0.05% of zinc oxide serosity gross weight and prepares containing by triethanolamine (TEA), calcium chloride (CaCl2), the flue gas desulfurization zinc oxide serosity of additive of PEG 20000 composition, and the zinc oxide serosity containing additive is put into serum recycle pond；
(4) by zinc abstraction factory containing SO2Concentration is 10000 mg/m3Flue gas be passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the zinc abstraction factory after pressurization is containing SO2Concentration is 10000 mg/m3Flue gas enter the bottom on absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serum recycle pond, the pH value making absorption tower internal oxidition zinc serosity is 3.5, slough the gas after sulfur dioxide to be discharged by top, absorption tower, after testing, SO in the gas after desulfurization2Content is 200 mg/m3, the zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
Embodiment
3
(1) first water is mixed and made into zinc oxide serosity with zinc oxide by weight the ratio for 1:3；
(2) by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl2), dodecylbenzene sodium sulfonate be mixed and made into additive in the ratio of 1:0.2:0.5；
(3) by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl2), the additive made of dodecylbenzene sodium sulfonate added in zinc oxide serosity in the ratio of the 0.5% of zinc oxide serosity gross weight and prepares containing by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl2), the flue gas desulfurization zinc oxide serosity of additive of dodecylbenzene sodium sulfonate composition, and the zinc oxide serosity containing additive is put into serum recycle pond；
(4) by zinc abstraction factory containing SO2Concentration is 15000 mg/m3Flue gas be passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the zinc abstraction factory after pressurization is containing SO2Concentration is 15000 mg/m3Flue gas enter the bottom on absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serum recycle pond, the pH value making absorption tower internal oxidition zinc serosity is 4.5, slough the gas after sulfur dioxide to be discharged by top, absorption tower, after testing, SO in the gas after desulfurization2Content is 190mg/m3, the zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
Embodiment
4
(1) first water is mixed and made into zinc oxide serosity with zinc oxide by weight the ratio for 1:2；
(2) by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl2), PEG 20000 be mixed and made into additive in the ratio of 2:0.3:1.2；
(3) by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl2), the additive made of PEG 20000 added in zinc oxide serosity in the ratio of the 0.3% of zinc oxide serosity gross weight and prepares containing by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl2), the flue gas desulfurization zinc oxide serosity of additive of PEG 20000 composition, and the zinc oxide serosity containing additive is put into serum recycle pond；
(4) by zinc abstraction factory containing SO2Concentration is 12000 mg/m3Flue gas be passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the zinc abstraction factory after pressurization is containing SO2Concentration is 12000 mg/m3Flue gas enter the bottom on absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serum recycle pond, the pH value making absorption tower internal oxidition zinc serosity is 5.2, slough the gas after sulfur dioxide to be discharged by top, absorption tower, after testing, SO in the gas after desulfurization2Content is 180mg/m3, the zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
Claims (7)
1. use the zinc oxide paste liquid sulfur method containing additive, comprise the following steps:
(1) water, zinc oxide are mixed and made into zinc oxide serosity；
(2) alkanolamine, inorganic salt and surfactant are mixed into zinc oxide paste solution additive；
(3) additive of step (2) gained is added in the zinc oxide serosity of step (1) and make the zinc oxide serosity containing additive, and it is standby that the zinc oxide serosity containing additive is put into serum recycle pond；
(4) the pending gas containing sulfur dioxide being passed through booster fan, compressor flow mates with gas flow, and blast reaches more than 5000Pa；
(5) the pending gas after pressurization enters the bottom on the absorption tower having three layer screen plate, from bottom to top in flow process with squeeze into top, absorption tower from serum recycle pond and absorb the sulfur dioxide pending gas from the zinc oxide slurry reaction of absorption tower top down spray, the pH value of the zinc oxide serosity sprayed in simultaneously regulating absorption tower by a certain amount of zinc oxide serosity supplementary in serosity, the pH value making absorption tower internal oxidition zinc serosity is 2.2-5.2, slough the gas after sulfur dioxide to be discharged by top, absorption tower, zinc oxide serosity after sulfur dioxide absorption returns to serum recycle pond.
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: in described step (1), in zinc oxide serosity, the weight percentage of zinc oxide is 35%-75%.
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: in described step (2), alkanolamine, inorganic salt, the part by weight of surfactant are (1-2): (0.2-0.5): (0.5-1.5).
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: described alkanolamine is one or both combination of triethanolamine or 2-amino-2-methyl-1-propanol.
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: described inorganic salt is one or both combination of calcium chloride or sodium chloride.
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: described surfactant is the combination of one or more in dodecylbenzene sodium sulfonate, Tween 80, PEG 20000.
A kind of employing the most according to claim 1 zinc oxide paste liquid sulfur method containing additive, it is characterised in that: the weight of the mixture being made up of alkanolamine, inorganic salt and surfactant added in zinc oxide serosity in described step (3) accounts for the 0.05%-0.5% of zinc oxide serosity gross weight.
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| CN110559818A (en) * | 2019-09-27 | 2019-12-13 | 广东金宇环境科技有限公司 | Flue gas desulfurization method using secondary zinc oxide soot as desulfurizer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6080281A (en) * | 1994-04-18 | 2000-06-27 | Attia; Yosry A. | Scrubbing of contaminants from contaminated air streams with aerogel materials with optional photocatalytic destruction |
| CN1531991A (en) * | 2003-03-18 | 2004-09-29 | 于文波 | Sulfur dioxide removing agent |
| CN103316576A (en) * | 2013-05-14 | 2013-09-25 | 宜兴市化工成套设备有限公司 | Desulfurizing and demisting combined tower |
| CN103349901A (en) * | 2013-06-14 | 2013-10-16 | 中国恩菲工程技术有限公司 | Flue gas processing method and device thereof |
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| CN102755826B (en) * | 2012-07-06 | 2014-11-12 | 江苏恒丰伟业科技工程有限公司 | Tail gas desulfuration adopting zinc oxide method in smelting industry |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6080281A (en) * | 1994-04-18 | 2000-06-27 | Attia; Yosry A. | Scrubbing of contaminants from contaminated air streams with aerogel materials with optional photocatalytic destruction |
| CN1531991A (en) * | 2003-03-18 | 2004-09-29 | 于文波 | Sulfur dioxide removing agent |
| CN103316576A (en) * | 2013-05-14 | 2013-09-25 | 宜兴市化工成套设备有限公司 | Desulfurizing and demisting combined tower |
| CN103349901A (en) * | 2013-06-14 | 2013-10-16 | 中国恩菲工程技术有限公司 | Flue gas processing method and device thereof |
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Address after: 225400, Zhenxing Road, Taixing Industrial Zone, Taizhou, Jiangsu 6, China Applicant after: JIANGSU LANDIAN ENVIRONMENTAL PROTION CO., LTD. Address before: 225400, Zhenxing Road, Taixing Industrial Zone, Taizhou, Jiangsu 6, China Applicant before: TAIXING ELECTROSTATIC PRECIPITATION EQUIPMENT FACTORY CO., LTD. |
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