CN102389697A - Method for removing arsenic hydride in tail gas of iron making blast furnace by wet process - Google Patents
Method for removing arsenic hydride in tail gas of iron making blast furnace by wet process Download PDFInfo
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- CN102389697A CN102389697A CN201110280624XA CN201110280624A CN102389697A CN 102389697 A CN102389697 A CN 102389697A CN 201110280624X A CN201110280624X A CN 201110280624XA CN 201110280624 A CN201110280624 A CN 201110280624A CN 102389697 A CN102389697 A CN 102389697A
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- tail gas
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- arsenic hydride
- naoh
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- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910000070 arsenic hydride Inorganic materials 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 9
- 229910052742 iron Inorganic materials 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 75
- 238000004140 cleaning Methods 0.000 claims description 17
- 239000000460 chlorine Substances 0.000 claims description 16
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 9
- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 claims description 8
- 229940000488 arsenic acid Drugs 0.000 claims description 8
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 239000003595 mist Substances 0.000 claims 1
- 239000005708 Sodium hypochlorite Substances 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 40
- 239000003054 catalyst Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical class [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 206010017740 Gas poisoning Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- MPMSMUBQXQALQI-UHFFFAOYSA-N cobalt phthalocyanine Chemical group [Co+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 MPMSMUBQXQALQI-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000002803 maceration Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- RLBIQVVOMOPOHC-UHFFFAOYSA-N parathion-methyl Chemical compound COP(=S)(OC)OC1=CC=C([N+]([O-])=O)C=C1 RLBIQVVOMOPOHC-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Abstract
The invention discloses a method for removing arsenic hydride in tail gas of an iron making blast furnace by a wet process. In the method, the tail gas of the iron making blast furnace is subjected to water washing and alkali washing to remove dust and acidic gas, then the tail gas is introduced into a reaction tower containing sodium hypochlorite, the arsenic hydride in the tail gas is removed by the strong oxidation action of sodium hypochlorite, and the thus, the tail gas is purified. With simple process and low treatment cost, the method is not limited by field, can treat complexly composed tail gas containing arsenic hydride and is suitable for industrial application.
Description
Technical field
The present invention relates to the method for arsine gas in a kind of wet cleaning blast furnace tail gas, belong to the waste gas pollution control and treatment chemical technology field.
Background technology
Arsenic hydride is a colourless gas, and belongs to severe toxicity type gas, the waste gas that is produced in process of production for some industry.In commercial production,, often contain arsenide in multiple metal (like zinc, tin, antimony, lead, the copper etc.) ore like mining and non-ferrous metal metallurgy.These ores are met acid (sulfuric acid, hydrochloric acid), all can be produced hydrogen sulfide, arsenic hydride and hydrogen phosphide in smelting, processing, storage process.Make calcium carbide, production and use acetylene, production synthetic dyestuffs, cyaniding refinement gold and silver etc. in addition and all can produce arsenic hydride,, and see at most with metallurgical industry so arsenic hydride is found in multiple industry.Extremely speed development along with smelting industry; The workshop poisonous gas poisoning incident that took place in the last few years is also more and more; Be protection health, elimination air pollution; China has also made the relevant policy standard, is 0.3mg/m like the maximum permissible concentration of arsenic hydride in China's (TJ36-79) workshop air sanitary standard
3
Publication number is the method that discloses arsenic hydride in a kind of purified industrial waste gas among the CN101402020A.This method is through a kind of modified molecular sieve catalyst of preparation, and modification liquid main component is phthalocyanine cobalt, Fe
2+, Mn
2+And Ni
2+, in fixed bed reactors, adding modified molecular sieve catalyst, heating fixed bed to 50～90 ℃ feed fixed bed reactors with industrial waste gas and carry out adsorption cleaning, and the concentration of reactor outlet arsine gas can reach 0.3mg/m
3Below, the modification behind the inactivation is analyzed sieve catalyst and can be regenerated.High, the applied range of the made modified molecular sieve catalyst low temperature active of this method has good selectivity and removal effect to arsenic hydride.
Publication number is to disclose PH in a kind of purified hydrogen air-flow among the CN1076173
3And AsH
3Immesion active carbon.Immesion active carbon is a carrier with the ature of coal granular activated carbon in this method, and dip composition comprises Cu, Hg, Cr, Ag.The preparation method of Immesion active carbon is: sieve is got the ature of coal granular activated carbon of certain particle size, uses CuSO
4And Cr
2O
3NH
4OH solution and AgNO
3Ethanolic solution fully mix, under 40～60 ℃ of temperature, add HgCl
2, press 70～80% liquid impregnations of active carbon water capacity, maceration extract PH is 8～13, placed greater than 3 hours the dipping back, in 100～150 ℃ air stream, handled 2～3 hours, said process carries out twice repeatedly, both Immesion active carbon.This method is to PH
3And AsH
3Treatment effect can reach international standard.
Publication number is to disclose a kind of Hydrodearsenic Catalyst FeCuP alloy and application thereof that the phosphine gas arsenic hydride removes that be used among the CN101219388.Hydrodearsenic Catalyst is the FeCuP alloy with the oxidation-reduction method preparation in this method.This alloy Cu content mass percent is 20%-35%, and P content mass percent is 0.9%-6.0%, and all the other are iron.Dearsenification step: in airtight gas circuit, feed the nitrogen deaeration; Heating dearsenification reactor, the phosphine gas that will contain arsenic hydride feeds in the reactor that Hydrodearsenic Catalyst is housed and carries out dearsenification, and it is secondary that the gas after the dearsenification imports the centrifuge tube that the silver salt absorption liquid is housed; Take off centrifuge tube behind the 45min; Add chloroform and supply 4mL, use the 1cm colorimetric cylinder, measure absorbance A in the 520nm wavelength.Carry out blank test and check experiment simultaneously, calculate arsenic-removing rate.Arsenic-removing rate was 80.53% when this method was 100 ℃ when dearsenification pipe temperature, and arsenic-removing rate was 98.6% when temperature was 150 ℃, and when temperature reaches 175 ℃ and when above, arsenic-removing rate can reach 100%.
Above-mentioned several method existing problems: (1) research emphasis all is placed in the catalyst development preparation, and the preparation process is complicated, and the catalyst regeneration cost is higher; (2) the Hydrodearsenic Catalyst regenerability is lower, causes secondary pollution easily.
Summary of the invention
The present invention is directed to above problem; The method of arsine gas in a kind of wet cleaning blast furnace tail gas is provided; Utilize the strong oxidation of strong oxidizer clorox in alkaline medium; Blast furnace tail gas through being the strong oxidizer liquor natrii hypochloritis of medium with highly basic, is used for purifying the arsenic hydride of high furnace exhaust gas.Purify the minimum 0.08mg/m that reduces to of arsenic hydride content in the gas of back
3, purification efficiency reaches more than 99%.
The present invention proposes a kind of method that purifies arsine gas in the high furnace exhaust gas of smelting industry; Utilize the strong oxidation of strong oxidizer clorox in alkaline medium; Blast furnace tail gas through with highly basic being the strong oxidizer liquor natrii hypochloritis of medium, is reduced to workshop air standard 0.3mg/m with the arsenic hydride in the high furnace exhaust gas
3Below.
The present invention accomplishes according to the following steps:
1). liquor natrii hypochloritis's preparation: preparation principle is chlorine and water effect, generates hypochlorous acid, gives birth to simultaneously
Become hydrochloric acid, generate hypochlorite with the sig water effect.With the Cl that is stored in the steel cylinder
2In gas meter feeding distilled water, process HClO, the Cl of feeding
2Amount is 1.6-2:951.5-962 with the distilled water mass ratio, and this solution available chlorine content is 0.08%-0.1%; In confined conditions commercially available solid state N aOH (purity is more than 96%) is added water and be mixed with solution, NaOH content should be 5%～15% in this solution; With the HClO solution for preparing and NaOH solution according to the mixed of 1:1 even NaClO solution, it is subsequent use to put into reaction tower, available chlorine content is 0.08%-0.1% in this solution, pH is 7-9;
2). purification process: with arsenic hydride content is 500～1600mg/m
3Blast furnace tail gas successively through washing, alkali cleaning, the effect of washing is cooling, dedusting, simultaneously can remove part P
4And H
2S, alkali cleaning is to remove CO a large amount of in the tail gas with 5%～10% NaOH solution through chemical reaction
2, H
2S, SO
2, sour gas such as HF; Gas successively through liquor natrii hypochloritis's reaction tower---the one-level liquor natrii hypochloritis's reaction tower and the secondary liquor natrii hypochloritis reaction tower of two-stage equal conditions, removes arsenic hydride after alkali cleaning, last tail gas is once more through the CO in the NaOH alkali cleaning deep removal tail gas
2The back discharging from technology end gas floss hole sample analysis, is 0.3mg/m through measuring sample tap arsenic hydride concentration
3Below, minimum 0.08 mg/m that reaches
3Be oxidized to the liquor natrii hypochloritis of arsenic acid by arsenic hydride, add the NaOH washing, adding proportion is NaOH: arsenic acid=3:1.
Advantage of the present invention is: 1) process is not limited by or not the place, both can use in integrated mill, can carry out pilot scale research in the laboratory yet; 2) process of the present invention can be applied to contain CO, H
2S, SO
2, PH
3Etc. the complex industrial gas cleaning, other gases also had removal effect preferably; 3) cleaning equipment and purification process are simple, and cost is lower.
Description of drawings
Fig. 1 is the process route chart of arsine gas in the high furnace exhaust gas of wet cleaning.
The specific embodiment
Embodiment 1
Under normal temperature and pressure, airtight condition, get the commercially available purity of 4.8kg and be 96% particulate form NaOH, adding distil water 87.36kg mixes, and the preparation mass percent is 5% NaOH soda-wash solution; With the 0.63m that is stored in the steel cylinder
3Cl
2(being converted into quality 2kg chlorine) processed HClO in the distilled water of gas meter feeding 951.5kg, the Cl that this step feeds
2Amount is 2:951.5 with the distilled water mass ratio, and HClO content is 1.5kg in the solution that makes; 5% the NaOH solution of getting 46kg and the HClO solution that has prepared mix NaClO solution, it is subsequent use to put into reaction tower, HClO:NaOH=1:1 in this solution, available chlorine content are 0.1%, solution PH is 7.With arsenic hydride content is 800mg/m
3Blast furnace tail gas successively through washing, alkali cleaning, one-level sodium hypochlorite reaction tower and secondary sodium hypochlorite reaction tower, last 5% NaOH solution removal CO through 40kg again
2, reaction velocity is 1500/h, measures secondary sodium hypochlorite reaction tower sample tap gas componant with the gas chromatograph of band TCD and PFD detector, recording arsenic hydride concentration is 0.16mg/m
3, purification efficiency reaches more than 99%.
Be reduced to the liquor natrii hypochloritis of arsenic acid by arsenic hydride, added the NaOH washing and make it be converted into the natrium arsenicum recovery, adding proportion is NaOH: arsenic acid=3:1.
Embodiment 2
Under normal temperature and pressure, airtight condition, get the commercially available purity of 7.08kg and be 96% particulate form NaOH, adding distil water 60.89kg mixes, and is mixed with mass percent and is 10% NaOH soda-wash solution; With the 0.5m that is stored in the steel cylinder
3The Cl of (conversion is the chlorine of quality 1.6kg)
2In the distilled water of gas meter feeding 962kg, process HClO, the Cl of feeding
2Amount is 1.6:962 with the distilled water mass ratio, and HClO content is 1.2kg in the solution that makes; 10% the NaOH solution of getting that 34kg prepares and the HClO solution that has prepared mix NaClO solution, it is subsequent use to put into reaction tower, HClO:NaOH=1:1 in this solution, available chlorine content are 0.08%, solution PH is 9.With arsenic hydride content is 1200mg/m
3Blast furnace tail gas successively through washing, alkali cleaning, one-level sodium hypochlorite reaction tower and secondary sodium hypochlorite reaction tower, last 10% NaOH solution removal CO through 30kg again
2, reaction velocity is 800/h, with the gas chromatograph assaying reaction tower 2 exit gas compositions of band TCD and PFD detector, arsenic hydride concentration is 0.08mg/m after purifying
3, purification efficiency reaches more than 99%.
Be reduced to the liquor natrii hypochloritis of arsenic acid by arsenic hydride, added the NaOH washing and make it be converted into the natrium arsenicum recovery, adding proportion is NaOH: arsenic acid=3:1.
Claims (3)
1. the method for arsine gas in the wet cleaning blast furnace tail gas is characterized in that carrying out as follows;
Liquor natrii hypochloritis's preparation
With the Cl that is stored in the steel cylinder
2In gas meter feeding distilled water, process HClO, the Cl of feeding
2Amount is 1.6-2:951.5-962 with the distilled water mass ratio;
In confined conditions solid state N aOH is added water and be mixed with solution, NaOH content should be 5%～15% in this solution;
With the HClO solution for preparing and NaOH solution according to the mixed of 1:1 even NaClO solution, it is subsequent use to put into reaction tower, available chlorine content is 0.08%-0.1% in this solution, pH is 7-9;
Purification process
To contain AsH
3Blast furnace tail gas through washing and alkali cleaning, remove the sour gas in the mist after, the liquor natrii hypochloritis's reaction tower through the two-stage equal conditions removes arsenic hydride successively, the gas that has removed arsenic hydride further alkali cleaning removes the CO in the tail gas
2Discharge the back; Be reduced to the liquor natrii hypochloritis of arsenic acid by arsenic hydride, added mass percent and be 5%～15% NaOH washing and make it be converted into natrium arsenicum to reclaim, adding proportion is NaOH: arsenic acid=3:1.
2. purification method according to claim 1 is characterized in that arsenic hydride content is 500～1600mg/m in the tail gas
3
3. purification method according to claim 1, it is characterized in that alkali cleaning used be that mass fraction is 5%～15% sodium hydroxide solution.
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|---|---|---|---|
| CN201110280624XA CN102389697A (en) | 2011-09-21 | 2011-09-21 | Method for removing arsenic hydride in tail gas of iron making blast furnace by wet process |
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|---|---|---|---|
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233129A (en) * | 2013-05-08 | 2013-08-07 | 金川集团股份有限公司 | Wet-process open treatment method of arsenic in copper ashes |
| CN103768907A (en) * | 2012-10-26 | 2014-05-07 | 中国石油化工股份有限公司 | Deep purification method for oxidizing and alkali-washing yellow phosphorus tail gas |
| CN105771602A (en) * | 2016-04-25 | 2016-07-20 | 云南煜锜环保科技有限公司 | Strong-oxidation absorption purification process for arsenic hydride containing waste gas |
| CN106495113A (en) * | 2016-10-08 | 2017-03-15 | 广东先导稀材股份有限公司 | The preparation method of high-purity zinc phosphide |
| CN108854487A (en) * | 2018-09-06 | 2018-11-23 | 常州纺织服装职业技术学院 | A kind of arsine/phosphine emission-control equipment and arsine/phosphine waste gas processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5095104A (en) * | 1973-12-26 | 1975-07-29 |
-
2011
- 2011-09-21 CN CN201110280624XA patent/CN102389697A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5095104A (en) * | 1973-12-26 | 1975-07-29 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103768907A (en) * | 2012-10-26 | 2014-05-07 | 中国石油化工股份有限公司 | Deep purification method for oxidizing and alkali-washing yellow phosphorus tail gas |
| CN103768907B (en) * | 2012-10-26 | 2015-10-28 | 中国石油化工股份有限公司 | A kind of method of yellow phosphoric tail gas oxidation alkali cleaning deep purifying |
| CN103233129A (en) * | 2013-05-08 | 2013-08-07 | 金川集团股份有限公司 | Wet-process open treatment method of arsenic in copper ashes |
| CN103233129B (en) * | 2013-05-08 | 2015-03-25 | 金川集团股份有限公司 | Wet-process open treatment method of arsenic in copper ashes |
| CN105771602A (en) * | 2016-04-25 | 2016-07-20 | 云南煜锜环保科技有限公司 | Strong-oxidation absorption purification process for arsenic hydride containing waste gas |
| CN106495113A (en) * | 2016-10-08 | 2017-03-15 | 广东先导稀材股份有限公司 | The preparation method of high-purity zinc phosphide |
| CN106495113B (en) * | 2016-10-08 | 2018-07-03 | 广东先导稀材股份有限公司 | The preparation method of high-purity zinc phosphide |
| CN108854487A (en) * | 2018-09-06 | 2018-11-23 | 常州纺织服装职业技术学院 | A kind of arsine/phosphine emission-control equipment and arsine/phosphine waste gas processing method |
| CN108854487B (en) * | 2018-09-06 | 2024-03-22 | 常州纺织服装职业技术学院 | Arsine/phosphane waste gas treatment device and arsine/phosphane waste gas treatment method |
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Application publication date: 20120328 |