CN102658002A - Method for absorbing and purifying hydrogen sulfide with EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system - Google Patents
Method for absorbing and purifying hydrogen sulfide with EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system Download PDFInfo
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- CN102658002A CN102658002A CN2012101453739A CN201210145373A CN102658002A CN 102658002 A CN102658002 A CN 102658002A CN 2012101453739 A CN2012101453739 A CN 2012101453739A CN 201210145373 A CN201210145373 A CN 201210145373A CN 102658002 A CN102658002 A CN 102658002A
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Abstract
The invention relates to a method for absorbing and purifying hydrogen sulfide with an EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system, which comprises the following steps: dissolving 1-10wt% of soluble iron salt in deionized water to prepare an iron salt solution; adding soluble copper salt and EDTA disodium salt into the iron salt solution in an iron salt/copper salt/EDTA disodium salt mass ratio of (1-5):1:1, thereby obtaining an EDTA chelated iron copper compound absorption solution; and introducing hydrogen sulfide gas with the concentration of 800-4000ppm to carry out absorption reaction. The method provided by the invention has the advantages of high removal efficiency, mild reaction conditions, low absorption solution cost, low raw material consumption, wide application range and the like, and is simple to operate.
Description
Technical field
The invention belongs to atmosphere and administer technical field, be specifically related to a kind of method of the EDTA of use chelated iron copper compound system absorption cleaning hydrogen sulfide.
Background technology
At present, hydrogen sulfide (H
2S), be mainly derived from the production process of industrial departments such as petroleum chemical industry, Gas Industry, metallurgical industry, sulfuric acid manufacturing industry, destructor plant and mineral processing industry as one of main component of foul gas.H
2The existence of S not only can cause the poisoning of equipment and corrosion of pipe, catalyst, and the health of the direct harmful to human of ability, even threat to life.
In the world to H
2The S Processing Technology is very active.At present domestic and international desulfur technology is comparative maturity, and sulfur method and sulfur removal technology are numerous, mainly contain dry method and wet method.Dry cleaning H
2The S method mainly comprises: absorption method and membrane separation process etc., the purified treatment that is usually used in hanging down sulfurous gas.Early to H
2What the absorption of S was mainly adopted is active carbon.Cavity in the active carbon is to H
2The oxidation of S plays an important role, and in addition, the existence of the surface characteristics of active carbon such as soda acid functional group is also very important to oxidizing process.Wet desulphurization is to utilize certain solution or solvent to deviate from the H in the waste gas
2S reuses behind solution that is used to absorb or the solvent reclamation.Can be divided into Physical Absorption and two kinds of methods of chemical absorbing again according to the mechanism of action.Physical Absorption solvent commonly used has methyl alcohol, propylene carbonate etc.As the solvent of Physical Absorption generally have the good stability of solvent under absorptive capacity height,, the operating temperature little to the gas solubility that need not remove, with the gas componant reaction, to requirements such as environment and equipment influence are little.Chemical absorption method is through active ingredient in the solution and H
2Chemical reaction takes place in S, reaches to absorb to remove H
2The purpose of S, the renewable use of the absorption liquid that is used to absorb.Common methods has: alkali absorption method, ammonia process, catalytic oxidation etc.
No matter be dry method or wet desulphurization, all have certain weak point.Dry desulfurization efficient is not high, desulfurizing agent regeneration difficulty, and Sulfur capacity is relatively low, mainly is applicable to meticulous desulfurization.The wet desulphurization treating capacity is big, and desulfuration efficiency is high, but continued operation, but the investment operating cost is high, and general producer is difficult to bear.In the new technology of wet desulphurization; The exploitation of complex iron is a focus; This method has advantages such as infiltration rate is fast, desulfuration efficiency is high, sulfur capacity is big, reproduction speed is fast, side reaction is few, cost is low, avirulence; But in practical application, exist equipment requirements high, sulfur recovery rate is not high, and problems such as oxidative degradation appear in complexing agent.
Summary of the invention
The present invention provides a kind of method of the EDTA of use chelated iron copper compound system absorption cleaning hydrogen sulfide for solving the problem in the present technology, and it is high that it has the efficient of removal, and the consumption of raw materials amount of system is little.
The present invention adopts following technical scheme to be achieved:
A kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide of the present invention, it may further comprise the steps;
A. prepare EDTA chelated iron copper composite absorbent liquid: at normal temperatures; At first soluble ferric iron salt is dissolved in according to mass percent 1% ~ 10% and makes iron salt solutions in the deionized water; Then soluble copper salt, EDTA disodium salt are added in the said iron salt solutions; The mass ratio of said soluble ferric iron salt, soluble copper salt, EDTA disodium salt is 1 ~ 5:1:1, and the solid that is stirred at normal temperatures in the solution all dissolves, or remaining solid no longer dissolves; Leave standstill after 30 ~ 120 minutes and filter, promptly get EDTA chelated iron copper composite absorbent liquid;
B. absorption cleaning hydrogen sulfide: the EDTA chelated iron copper composite absorbent liquid of step a gained is joined in the absorption plant; Be that the hydrogen sulfide gas of 800ppm ~ 4000ppm is passed into and carries out absorption cleaning in the absorption plant and handle with concentration then; Reaction system is carried out at normal temperatures and pressures; Said hydrogen sulfide gas feeds in the absorption plant with the flow velocity of 8L/min; Every at a distance from exit concentration of 30min mensuration, till the exit concentration variation was not obvious or constant, remaining hydrogen sulfide tail gas adopted sodium hydroxide solution to absorb processing.
Preferably, described soluble ferric iron salt is a kind of in ferric trichloride, ferric nitrate or the ferric sulfate.
Preferably, described soluble copper salt comprises a kind of in copper chloride, copper nitrate or the copper sulphate.
Preferably, said iron salt solutions concentration is 5%.
Preferably, the mode of said stirring is a mechanical agitation.
Preferably, said filtration is a vacuum filtration.
Preferably, said sulfureted hydrogen gas concentration is 800ppm, when wherein sulfureted hydrogen gas concentration is less than 1000ppm, is defined as low concentration; Sulfureted hydrogen gas concentration is defined as intermediate concentration when 1000ppm to 2000ppm; Sulfureted hydrogen gas concentration is defined as high concentration during greater than 2000ppm.
The present invention compared with prior art has following significant advantage:
(1) the present invention has more stable removal efficient, and the consumption of raw materials amount of system is little simultaneously.
(2) the present invention removes hydrogen sulfide gas efficient height, the regeneration of absorption solution rate is high, and clearance reaches 80% ~ 98%, and the regeneration of absorption solution rate reaches 65% ~ 80%, and the rate of recovery of The product sulfur is higher, can reach 90% ~ 98%, and purity reaches 95% ~ 99%.
(3) the present invention is for H
2The concentration range that S handles is more extensive, for high, medium and low three other H of concentration level
2S has removal effect preferably.
In a word, that the inventive method has is simple to operate, reaction condition is gentle, and the absorption liquid cost is low, and consumption of raw materials is little, and it is high to remove efficient, advantages of wide application range.
The specific embodiment
Below in conjunction with embodiment the present invention is further described.
Embodiment 1
According to the inventive method, prepare concentration earlier and be 1% liquor ferri trichloridi, making molysite, mantoquita, EDTA disodium salt mass ratio then is the EDTA chelated iron copper composite absorbent liquid of 1:1:1, the sulfureted hydrogen gas concentration of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 54.4ppm, and clearance is 93.2%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 218ppm, and clearance is 89.1%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 596ppm, and clearance is 85.1%.
Embodiment 2
According to above-mentioned preparation method, prepare concentration earlier and be 1% liquor ferri trichloridi, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 4:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 28ppm, and clearance is 96.5%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 98ppm, and clearance is 95.1%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 500ppm, and clearance is 87.5%.
Embodiment 3
According to above-mentioned preparation method, prepare concentration earlier and be 1% iron nitrate solution, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 5:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 36.8ppm, and clearance is 95.4%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 218ppm, and clearance is 89.1%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 500ppm, and clearance is 87.5%.
Embodiment 4
According to above-mentioned preparation method, prepare concentration earlier and be 5% liquor ferri trichloridi, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 1:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 21.6ppm, and clearance is 97.3%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 98ppm, and clearance is 95.1%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 604ppm, and clearance is 84.9%.
Embodiment 5
According to above-mentioned preparation method, prepare concentration earlier and be 5% liquor ferri trichloridi, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 4:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 8.8ppm, and clearance is 98.9%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 92ppm, and clearance is 95.4%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 368ppm, and clearance is 90.8%.
Embodiment 6
According to above-mentioned preparation method, prepare concentration earlier and be 5% iron nitrate solution, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 5:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 36.8ppm, and clearance is 95.4%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 218ppm, and clearance is 89.1%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 368ppm, and clearance is 90.8%.
Embodiment 7
According to above-mentioned preparation method, prepare concentration earlier and be 10% liquor ferri trichloridi, make molysite then: mantoquita: the EDTA mass ratio is the EDTA chelated iron copper composite absorbent liquid of 1:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 46.4ppm, and clearance is 94.2%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 168ppm, and clearance is 91.6%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 556ppm, and clearance is 86.1%.
Embodiment 8
According to above-mentioned preparation method, prepare concentration earlier and be 10% liquor ferri trichloridi, make molysite then: mantoquita: the EDTA mass ratio is the EDTA chelated iron copper composite absorbent liquid of 4:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 15.2ppm, and clearance is 98.1%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 124ppm, and clearance is 93.8%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 368ppm, and clearance is 90.8%.
Embodiment 9
According to above-mentioned preparation method, prepare concentration earlier and be 10% iron nitrate solution, make molysite then: mantoquita: EDTA disodium salt mass ratio is the EDTA chelated iron copper composite absorbent liquid of 5:1:1, and the concentration of hydrogen sulfide of processing is 800ppm ~ 4000ppm.Through the reaction under the 8h normal temperature, when the processing sulfureted hydrogen gas concentration was 800ppm, exit concentration was 38.4ppm, and clearance is 95.2%; When the processing sulfureted hydrogen gas concentration was 2000ppm, exit concentration was 120ppm, and clearance is 94.0%; When the processing sulfureted hydrogen gas concentration was 4000ppm, exit concentration was 420ppm, and clearance is 89.5%.
Claims (7)
1. a method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide is characterized in that it may further comprise the steps;
A. prepare EDTA chelated iron copper composite absorbent liquid: at normal temperatures; At first soluble ferric iron salt is dissolved in according to mass percent 1% ~ 10% and makes iron salt solutions in the deionized water; Then soluble copper salt, EDTA disodium salt are added in the said iron salt solutions; The mass ratio of said soluble ferric iron salt, soluble copper salt, EDTA disodium salt is 1 ~ 5:1:1, and the solid that is stirred at normal temperatures in the solution all dissolves, or remaining solid no longer dissolves; Leave standstill after 30 ~ 120 minutes and filter, promptly get EDTA chelated iron copper composite absorbent liquid;
B. absorption cleaning hydrogen sulfide: the EDTA chelated iron copper composite absorbent liquid of step a gained is joined in the absorption plant; Be that the hydrogen sulfide gas of 800ppm ~ 4000ppm is passed into and carries out absorption cleaning in the absorption plant and handle with concentration then; Reaction system is carried out at normal temperatures and pressures; Said hydrogen sulfide gas feeds in the absorption plant with the flow velocity of 8L/min; Every at a distance from exit concentration of 30min mensuration, till the exit concentration variation was not obvious or constant, remaining hydrogen sulfide tail gas adopted sodium hydroxide solution to absorb processing.
2. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that, described soluble ferric iron salt is a kind of in ferric trichloride, ferric nitrate or the ferric sulfate.
3. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that, described soluble copper salt is a kind of in copper chloride, copper nitrate or the copper sulphate.
4. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that said iron salt solutions concentration is 5%.
5. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that the mode of said stirring is a mechanical agitation.
6. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that said filtration is a vacuum filtration.
7. a kind of method of using EDTA chelated iron copper compound system absorption cleaning hydrogen sulfide as claimed in claim 1 is characterized in that said sulfureted hydrogen gas concentration is 800ppm.
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| CN2012101453739A CN102658002A (en) | 2012-05-11 | 2012-05-11 | Method for absorbing and purifying hydrogen sulfide with EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106758164A (en) * | 2016-11-22 | 2017-05-31 | 郑州仁宏医药科技有限公司 | A kind of flue filtering material Final finishing expanded material and its preparation method and application |
| CN109561730A (en) * | 2016-08-17 | 2019-04-02 | 菲利普莫里斯生产公司 | Aerosol with novel tobacco matrix generates product |
| CN109663486A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Hydrogen sulfide leakage inhales disappear liquid and purposes |
| CN109663485A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Hydrogen sulfide gas leakage emergency removes liquid and purposes |
| CN109663472A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Quickly remove the dry-powder-type arresting agent and preparation method of hydrogen sulfide gas |
| CN111807665A (en) * | 2020-06-23 | 2020-10-23 | 诚邦生态环境股份有限公司 | Municipal sludge and garden waste cooperative recycling treatment method and system |
| CN114733334A (en) * | 2022-03-18 | 2022-07-12 | 南阳迎盈环保科技有限公司 | Liquid biomass deodorant |
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| CN101327396A (en) * | 2008-07-31 | 2008-12-24 | 深圳市龙澄高科技环保有限公司 | Method and device for removing hydrogen sulfide from gas containing hydrogen sulfide and recovering sulfer using catalytic oxidation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561730A (en) * | 2016-08-17 | 2019-04-02 | 菲利普莫里斯生产公司 | Aerosol with novel tobacco matrix generates product |
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| CN109663486A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Hydrogen sulfide leakage inhales disappear liquid and purposes |
| CN109663485A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Hydrogen sulfide gas leakage emergency removes liquid and purposes |
| CN109663472A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Quickly remove the dry-powder-type arresting agent and preparation method of hydrogen sulfide gas |
| CN109663472B (en) * | 2017-10-17 | 2021-11-09 | 中国石油化工股份有限公司 | Dry powder type trapping and eliminating agent for quickly removing hydrogen sulfide gas and preparation method thereof |
| CN111807665A (en) * | 2020-06-23 | 2020-10-23 | 诚邦生态环境股份有限公司 | Municipal sludge and garden waste cooperative recycling treatment method and system |
| CN114733334A (en) * | 2022-03-18 | 2022-07-12 | 南阳迎盈环保科技有限公司 | Liquid biomass deodorant |
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Application publication date: 20120912 |