CN103585819A - Coal-fired flue gas cloth bag demercuration filter cloth and preparation method thereof - Google Patents
Coal-fired flue gas cloth bag demercuration filter cloth and preparation method thereof Download PDFInfo
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- CN103585819A CN103585819A CN201310590563.6A CN201310590563A CN103585819A CN 103585819 A CN103585819 A CN 103585819A CN 201310590563 A CN201310590563 A CN 201310590563A CN 103585819 A CN103585819 A CN 103585819A
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Abstract
The invention discloses a coal-fired flue gas cloth bag demercuration filter cloth and a preparation method thereof, and belongs to the atmosphere pollution control field of environmental engineering. The coal-fired flue gas cloth bag demercuration filter cloth comprises a basic cloth layer, a carrier layer and an activating layer, wherein the basic cloth layer is filter cloth; the carrier layer is a silica gel water solution or a molecular sieve water solution; the activating layer is sulfide, iodide, chloride or combinations thereof; the basic cloth layer is coated with the carrier layer; the activating layer is attached on the carrier layer, and is used for filtering away mercury in coal-fired flue gas. The preparation method of the coal-fired flue gas cloth bag demercuration filter cloth is as follows: the filter cloth is processed through the water solution of the carrier layer and activating agent, and is dried to form the demercuration filter cloth with special absorption for the mercury. The coal-fired flue gas cloth bag demercuration filter cloth and the preparation method have the advantages that equipment and operation procedures for production processing as well as the load for a smoke processing system of a power plant are not increased,, only a cloth bag is modified, the technique method is simple, the operation is easy, the cost is low, the filtration of the mercury in the coal-fired flue gas is effective, and the application benefit is practical.
Description
technical field:
The present invention relates to environmental engineering Air Pollution Control field, particularly a kind of coal-fired flue-gas cloth bag demercuration filter cloth and preparation method thereof.
background technology:
Coal-fired mercury pollution is the universally acknowledged in recent years another large pollution problem after coal-fired sulphur pollution, and wherein coal-burning power plant is topmost mercury emissions pollution sources.Flue gas demercuration mainly contains following several method: adsorbent method, chemical precipitation method and chemical oxidization method.
Active carbon adsorption technology is current most study, but its application in coal fired power plant is still owing to existing following factor to be restricted: the mercury content in (1) flue gas is low, and the exhaust gas volumn that process (2) is very large; (3) in flue gas, the adsorbable content of material of other activated carbon is very high; (4) time that flue gas absorption stops is short; (5) SO
2often very high with HCl concentration.In these cases, the efficiency of active carbon adsorption obviously declines, and therefore directly adopts the method cost of active carbon adsorption very high.(< < Environmental science and technology > > in September, 2012, the 9th phase, 45-55 page)
In addition, still there is activated carbon fiber non-woven filter cloth to process the coal-fired flue-gas (patent No.: 200910194773.7) technology, becomes filter cloth by NACF and tetrafluoroethylene fiber are bonding.This kind of technique has increased filter cloth production process, and unit are filter cloth grammes per square metre, far above common filter cloth, causes serious load to dedusting mounting system; And active carbon is easily oxidized, cloth bag is shorter service life, and market using value is lower; Meanwhile, charcoal absorption scope is wider, does not have selectivity, causes large usage quantity, and cost is higher, cannot promote.
summary of the invention:
Given this, be necessary to research and develop coal-fired flue-gas cloth bag demercuration filter cloth that a kind of cost is low, demercuration is effective and preparation method thereof.
A cloth bag demercuration filter cloth, comprising: base cloth layer, carrier layer and active layer; Wherein, base cloth layer is filter cloth, carrier layer is aqueous solution of silica gel or zeolite-water solution, active layer sulfide or iodide or chloride or its combination, carrier layer is coated on outside base cloth layer, active layer is attached in carrier layer, thereby active layer is for generating the mercury of stable mercuric sulphide or mercury halide filtering coal-fired flue-gas by chemical reaction;
Preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: filter cloth is passed through to the upper carrier layer of aqueous solution coating of carrier layer, then by Treatment with activating agent, form demercuration filter cloth mercury to selectivity adsorption capacity after drying.
Preferably, activator is a kind of or any combination in sulphur, KI, vulcanized sodium, iodine steam.
Preferably, in coal-fired flue-gas cloth bag demercuration filter cloth preparation method, filter cloth also will be processed and reduce by the electrokinetic potential of coal-fired flue-gas cloth bag demercuration filter cloth adsorbate through efficient flocculant, and efficient flocculant is a kind of or any combination in polyacrylamide (PAM), aluminium polychloride (PAC), activated alumina, aluminum sulfate, aluminium chloride, ferric sulfate, iron chloride.
Preferably, coal-fired flue-gas cloth bag demercuration filter cloth preparation method is as follows: polytetrafluoroethylene (PTFE) (PTFE) or polyphenylene sulfide (PPS) filter cloth are immersed to silica gel (SiO
2.nH
2o) aqueous solution, filter cloth, by after aqueous solution of silica gel, puts it in tube furnace and is warming up to 90 ~ 160 ℃ with 5 ~ 15 ℃/min, makes the absorption filter cloth of uniform coating; To adsorb filter cloth by 0.1～90wt.% solution of vulcanized sodium, polyacrylamide (PAM) configuration, and put it in baking oven and be warming up to 110 ~ 150 ℃ with 5 ~ 15 ℃/min, make the demercuration filter cloth mercurous coal-fired flue-gas to high absorption capacity.
Preferably, coal-fired flue-gas cloth bag demercuration filter cloth preparation method is as follows: terylene needled felt (PET) or glass Nomex (FG) filter cloth are immersed to silica gel (SiO
2.nH
2o)+aluminium polychloride (PAC) aqueous solution, filter cloth passes through, after silica gel or the aluminium polychloride aqueous solution, to put it in baking oven and be warming up to 90 ~ 160 ℃, makes the absorption filter cloth of uniform coating; Absorption filter cloth is passed into sulphur steam reaction 2 hours, make the sulphur demercuration filter cloth that infiltrates 5wt.%.
Preferably, preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: polypropylene fibre Nomex (PP) or polyimides (P84) Nomex filter cloth are immersed to sodium metasilicate, sodium aluminate, aluminium hydroxide and the reacted zeolite-water solution of sodium hydrate aqueous solution, after immersion, put it in drying oven with heated-air drying, make the absorption filter cloth of uniform coating; It is 2g/m that absorption filter cloth is passed into iodine steam concentration
3nitrogen, flow velocity 0.8 ~ 1.5m/min, reacts 3 hours, makes the iodine demercuration filter cloth that infiltrates 1wt.%.
The present invention neither increases equipment and the operational sequence of production and processing, does not increase again the load of power-plant flue gas treatment system, only cloth bag has been carried out to modification, process simply, easily operation, with low cost, the mercury in filtering coal-fired flue-gas, has actual using value effectively.
the specific embodiment:
A cloth bag demercuration filter cloth, comprising: base cloth layer, carrier layer and active layer; Wherein, base cloth layer is filter cloth, carrier layer is aqueous solution of silica gel or zeolite-water solution, active layer sulfide or iodide or chloride or its combination, carrier layer is coated on outside base cloth layer, active layer is attached in carrier layer, thereby active layer is for generating the mercury of stable mercuric sulphide or mercury halide filtering coal-fired flue-gas by chemical reaction;
Preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: filter cloth is passed through to silica gel or zeolite-water solution continuously, after dry, on filter cloth surface, form Kiselgel A or molecular sieve carrier layer, as the carrier of activator, silica gel or molecular sieve have certain adsorption capacity simultaneously.The filter cloth that forms even carrier layer passes through activator continuously, activator selects sulphur, KI, vulcanized sodium, efficient flocculant etc. to be configured to 0.1～90wt.% solution, filter cloth floods by activator, then filter cloth passes through heating, drying continuously, 50～350 ℃ of heating-up temperatures, make the modification demercuration filter cloth containing 0.1～10wt.% sulphur, iodine or chlorine.
Embodiment mono-: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: polytetrafluoroethylene (PTFE) (PTFE) or polyphenylene sulfide (PPS) filter cloth are immersed to silica gel (SiO
2.nH
2o) aqueous solution, filter cloth, by after aqueous solution of silica gel, puts it in tube furnace and is warming up to 90 ~ 160 ℃ with 5 ~ 15 ℃/min, makes the absorption filter cloth of uniform coating; To adsorb filter cloth by 0.1～90wt.% solution of vulcanized sodium, polyacrylamide (PAM) configuration, and put it in baking oven and be warming up to 110 ~ 150 ℃ with 5 ~ 15 ℃/min, make the demercuration filter cloth mercurous coal-fired flue-gas to high absorption capacity.。
Embodiment bis-: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: terylene needled felt (PET) or glass Nomex (FG) filter cloth are immersed to silica gel (SiO
2.nH
2o)+aluminium polychloride (PAC) aqueous solution, filter cloth passes through, after silica gel or the aluminium polychloride aqueous solution, to put it in baking oven and be warming up to 90 ~ 160 ℃, makes the absorption filter cloth of uniform coating; Absorption filter cloth is passed into sulphur steam reaction 2 hours, make the sulphur demercuration filter cloth that infiltrates 5wt.%.
Embodiment tri-: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: polypropylene fibre Nomex (PP) or polyimides (P84) Nomex filter cloth are immersed to sodium metasilicate, sodium aluminate, aluminium hydroxide and the reacted zeolite-water solution of sodium hydrate aqueous solution, after immersion, put it in drying oven with heated-air drying, make the absorption filter cloth of uniform coating; It is 2g/m that absorption filter cloth is passed into iodine steam concentration
3nitrogen, flow velocity 0.8 ~ 1.5m/min, reacts 3 hours, makes the iodine demercuration filter cloth that infiltrates 1wt.%.
Polyacrylamide (PAM) or aluminium polychloride (PAC) mainly play the electrokinetic potential of reduction adsorbed material and improve adsorption capacity.Vulcanized sodium on carrier etc. react the effect that generates stable mercuric sulphide and play the mercury in flue gas with mercury.
Claims (6)
1. coal-fired flue-gas cloth bag demercuration filter cloth and preparation method thereof, is characterized in that: coal-fired flue-gas cloth bag demercuration filter cloth comprises: base cloth layer, carrier layer and active layer; Wherein, base cloth layer is filter cloth, carrier layer is aqueous solution of silica gel or zeolite-water solution, active layer sulfide or iodide or chloride or its combination, carrier layer is coated on outside base cloth layer, active layer is attached in carrier layer, thereby active layer is for generating the mercury of stable mercuric sulphide or mercury halide filtering coal-fired flue-gas by chemical reaction;
Preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: filter cloth is passed through to the upper carrier layer of aqueous solution coating of carrier layer, then by Treatment with activating agent, form demercuration filter cloth mercury to selectivity adsorption capacity after drying.
2. coal-fired flue-gas cloth bag demercuration filter cloth as claimed in claim 1 and preparation method thereof, is characterized in that: activator is a kind of or any combination in sulphur, KI, vulcanized sodium, iodine steam.
3. coal-fired flue-gas cloth bag demercuration filter cloth as claimed in claim 1 and preparation method thereof, it is characterized in that: in coal-fired flue-gas cloth bag demercuration filter cloth preparation method, filter cloth also will be processed and reduce by the electrokinetic potential of coal-fired flue-gas cloth bag demercuration filter cloth adsorbate through efficient flocculant, and efficient flocculant is a kind of or any combination in polyacrylamide (PAM), aluminium polychloride (PAC), activated alumina, aluminum sulfate, aluminium chloride, ferric sulfate, iron chloride.
4. coal-fired flue-gas cloth bag demercuration filter cloth as claimed in claim 1 and preparation method thereof, is characterized in that: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: polytetrafluoroethylene (PTFE) (PTFE) or polyphenylene sulfide (PPS) filter cloth are immersed to silica gel (SiO
2.nH
2o) aqueous solution, filter cloth, by after aqueous solution of silica gel, puts it in tube furnace and is warming up to 90 ~ 160 ℃ with 5 ~ 15 ℃/min, makes the absorption filter cloth of uniform coating; To adsorb filter cloth by 0.1～90wt.% solution of vulcanized sodium, polyacrylamide (PAM) configuration, and put it in baking oven and be warming up to 110 ~ 150 ℃ with 5 ~ 15 ℃/min, make the demercuration filter cloth mercurous coal-fired flue-gas to high absorption capacity.
5. coal-fired flue-gas cloth bag demercuration filter cloth as claimed in claim 1 and preparation method thereof, is characterized in that: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: terylene needled felt (PET) or glass Nomex (FG) filter cloth are immersed to silica gel (SiO
2.nH
2o) or aluminium polychloride (PAC) aqueous solution, filter cloth by silica gel or the aluminium polychloride aqueous solution after, put it in baking oven and be warming up to 90 ~ 160 ℃, make the absorption filter cloth of uniform coating; Absorption filter cloth is passed into sulphur steam reaction 2 hours, make the sulphur demercuration filter cloth that infiltrates 5wt.%.
6. coal-fired flue-gas cloth bag demercuration filter cloth as claimed in claim 1 and preparation method thereof, it is characterized in that: preparation method is as follows for coal-fired flue-gas cloth bag demercuration filter cloth: polypropylene fibre Nomex (PP) or polyimides (P84) Nomex filter cloth are immersed to sodium metasilicate, sodium aluminate, aluminium hydroxide and the reacted zeolite-water solution of sodium hydrate aqueous solution, after immersion, put it in drying oven with heated-air drying, make the absorption filter cloth of uniform coating; It is 2g/m that absorption filter cloth is passed into iodine steam concentration
3nitrogen, flow velocity 0.8 ~ 1.5m/min, reacts 3 hours, makes the iodine demercuration filter cloth that infiltrates 1wt.%.
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| CN201310590563.6A CN103585819B (en) | 2013-11-22 | 2013-11-22 | Coal-fired flue gas cloth bag demercuration filter cloth and preparation method thereof |
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| CN103585819B CN103585819B (en) | 2016-01-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148874A (en) * | 2015-09-01 | 2015-12-16 | 安徽省含山县天顺环保设备有限公司 | Composite porous flue gas adsorbent |
| CN109774267A (en) * | 2019-03-22 | 2019-05-21 | 广州市帝东环保科技有限公司 | A kind of environmental-friendly construction material with long service life and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480555A (en) * | 2008-12-23 | 2009-07-15 | 东华大学 | Integrated control method capable of simultaneously removing inhalable particles and heavy metal from fire coal |
| CN103272567A (en) * | 2013-05-16 | 2013-09-04 | 马玉山 | Adsorbent for removing mercury in smoke gas and preparation method thereof |
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2013
- 2013-11-22 CN CN201310590563.6A patent/CN103585819B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480555A (en) * | 2008-12-23 | 2009-07-15 | 东华大学 | Integrated control method capable of simultaneously removing inhalable particles and heavy metal from fire coal |
| CN103272567A (en) * | 2013-05-16 | 2013-09-04 | 马玉山 | Adsorbent for removing mercury in smoke gas and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148874A (en) * | 2015-09-01 | 2015-12-16 | 安徽省含山县天顺环保设备有限公司 | Composite porous flue gas adsorbent |
| CN109774267A (en) * | 2019-03-22 | 2019-05-21 | 广州市帝东环保科技有限公司 | A kind of environmental-friendly construction material with long service life and preparation method thereof |
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| CN103585819B (en) | 2016-01-27 |
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