CN104722188A - Mercury vapor absorbing device and mercury vapor absorbing method - Google Patents
Mercury vapor absorbing device and mercury vapor absorbing method Download PDFInfo
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- CN104722188A CN104722188A CN201510092611.8A CN201510092611A CN104722188A CN 104722188 A CN104722188 A CN 104722188A CN 201510092611 A CN201510092611 A CN 201510092611A CN 104722188 A CN104722188 A CN 104722188A
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- membrane contactor
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- absorbing liquid
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Abstract
The invention discloses an absorbing device and absorbing method for absorbing mercury vapor from waste gas. The absorbing device comprises a filter, a fan, a membrane contactor, a constant flow pump, a precipitation filter, and an absorption liquid tank. The absorption method comprises the following steps: chemically reacting the mercury-containing waste gas and absorption liquid through a micropore polymeric membrane in the membrane contactor to generate mercuric sulfide precipitate; absorbing purified clean gas, discharging the clean gas from the membrane contactor, filtering precipitate of the precipitation-containing absorption liquid through a precipitation filter, enabling the filtered precipitate to enter the absorption liquid tank, and recycling the absorption liquid. The loading density of the membrane contactor of the device is large, the flow velocity is not limited, the device has a fixed and computable gas-liquid mass transfer area, and the absorption liquid for operation is small in volume, the volume is at least 5 times smaller than the volume used by the existing absorption tower; the mercury removal rate can achieve 95% and more; the absorption liquid can be recycled, and the resource utilization rate is high.
Description
Technical field
The present invention relates to a kind of exhaust gas absorption device and absorption process, be specifically related to a kind of from waste gas, absorb mercury vapour absorption plant and absorption process, belong to and utilize film absorption technique purified treatment gas field.
Background technology
Mercury is in a liquid state existence under normal temperature, normal pressure, and easily evaporate, the gas after evaporation has severe toxicity; And the compound of mercury and mercury is applied very extensive in industry, agricultural, medicine and daily life.About have more than 80 kind of industrial production product needed mercury to make raw material or auxiliary material in the world at present, the annual mercury scattered and disappeared in the environment is estimated to reach 5000t, constitutes a serious threat to human health.Mercury vapour, as toxic air contaminant, invades human body by the different approaches such as respiratory tract, skin or alimentary canal, causes the poisoning and deep tissue pathology of human nerve, even there will be confusion, and then mad spasm is lethal.On the other hand, mercury and mercuric compounds is again important raw materials for production, as do not made full use of these mercury resources, can cause the serious waste of resource.Therefore the recycling and administration of mercury is become to the focus of current concern.
There is a lot of technology in the domestic and international improvement field at mercury at present, mainly contains solid absorption method, liquid absorption method.Solid absorption method mainly utilizes the active carbon of active carbon or load chlorine, sulphur, silver etc. to remove mercury by fixed adsorption bed, and this process activity charcoal consumption is large, and treatment effeciency is not high, and mercury recycling difficulty is larger; Liquid absorption method mainly will pass in absorption tower containing mercury gas and react to remove mercury with absorbent, but traditional absorption tower exists gas-liquid mass transfer area to be changed with the change of gas-liquid two-phase flow velocity, gas-liquid mass transfer area need by Empirical Equation and measuring, and gas-liquid directly contacts, easily cause the phenomenons such as general liquid, channel and foaming, mass-transfer efficiency is often very low, and absorption equipment volume is large in addition, has that absorbent use amount is comparatively large, high in cost of production is not enough.Therefore, design and develop one and succinctly efficiently can process mercury vapour, the technology that simultaneously can realize again mercury resource reutilization is particularly important, and this will bring environmental protection and economic two aspect benefits.
Summary of the invention
The object of this invention is to provide a kind of mercuryvapour absorption plant and absorption process, adopt absorption and membrane technology integrated technology that mercury vapour is carried out efficient absorption improvement, thus improve air quality, realize mercury resource reclaim recycling, reduce costs.
To achieve these goals, the invention provides a kind of mercury vapour mercury absorption plant, the technical scheme of employing is:
A kind of mercury vapour mercury absorption plant, comprises filter, blower fan, membrane contactor, constant flow pump, deposition filter, absorption flow container; Described filter is connected by the upper end of blower fan with membrane contactor tube side, described constant flow pump one end is connected with the import of membrane contactor shell side, the other end is connected with absorption flow container one end, described deposition filter one end is connected with membrane contactor shell-side outlet, the other end is connected with the absorption flow container other end, described membrane contactor tube side gas vent external connection row vacant duct.
Described membrane contactor is hydrophobic hollow fiber membrane module.
Described membrane contactor is at least one.
Described membrane contactor is for adopting in parallel or series system connection time two or more.
In described hydrophobic hollow fiber membrane module, material is microporous polymer film.
Described microporous polymer film is a kind of in polytetrafluoroethylene (PTFE), polyvinylidene fluoride, polypropylene, polyethylene or material that any several component is formulated.
Described deposition filter is a kind of or several arbitrarily combination in gauze filter, sand-like filter, membranaceous filter.
The present invention also provides a kind of mercuryvapour absorption process, comprises the following steps:
A, the absorbing liquid absorbed in flow container pass in the shell side of membrane contactor through constant flow pump, mercurous waste gas is passed in the tube side of membrane contactor by blower fan after filter, mercurous waste gas, through the microporous polymer film in membrane contactor and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation;
Clean gas after B, absorption cleaning is discharged from membrane contactor, and enter in absorbing liquid tank after the absorbing liquid containing precipitation filters out precipitation by deposition filter, absorbing liquid recycles.
Absorbing liquid described in steps A is a kind of or several arbitrarily combination in the sodium sulfide solution of mass percent concentration 1%-5%, potassium sulfide solution, sodium bisulfide solution, potassium hydrogen sulfide solution, sodium chloride solution, Klorvess Liquid, sodium hydroxide solution, potassium hydroxide solution.
The pH value of absorbing liquid described in steps A is 8-10, and temperature is 10-30 DEG C.
Beneficial effect of the present invention:
(1) mercury vapour absorption plant of the present invention does not need the main equipments such as absorption tower, operating cost is low, simple to operate, the loading density of membrane contactor is large, at least larger than general absorption tower 10 times, and flow velocity is unrestricted, there is fixing, computable gas-liquid mass transfer area, little for the absorbing liquid volume operated, volume extremely when young 5 times more used than existing absorption tower.
(2) absorption process demercuration rate of the present invention can reach more than 95%, higher than the demercuration rate of 70-90% in current mercury administering method.
(3) absorbing liquid that absorption process of the present invention uses can be recycled, and resource utilization is high.
(4) mercury processed of the present invention becomes precipitation and can be used for other aspects, realizes the recycling of mercury resource.
Accompanying drawing explanation
Fig. 1 is present invention process schematic flow sheet.
In accompanying drawing: 1-filter, 2-blower fan, 3-membrane contactor, 4-constant flow pump, 5-deposition filter, 6-absorb flow container.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment 1:
A kind of mercuryvapour absorption process, comprises the following steps:
A, concentration are 0.5mg/m
3, flow is 0.6m
3the mercurous waste gas of/h is passed into by blower fan 2 in the tube side of membrane contactor 3 after filter 1, using pH value be 9, temperature is 25 DEG C, the sodium sulfide solution of mass percent concentration 1% is as absorbing liquid, absorbing liquid passes in the shell side of membrane contactor 3 by constant flow pump 4, mercurous waste gas, through the microporous polymer film in membrane contactor 3 and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation; Membrane contactor 3 selects hydrophobic polypropylene hollow fiber film assembly, and its material is polytetrafluoroethylene (PTFE), and blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5;
Clean gas after B, absorption cleaning is discharged from membrane contactor 3, and enter in absorbing liquid tank 6 after the absorbing liquid containing precipitation filters out precipitation by deposition filter 5, absorbing liquid recycles and carries out continuous absorption.
After the method process of the present embodiment, the concentration that membrane contactor 3 exports mercury vapour is 0.012mg/m
3, be 97%, after continuous absorption is administered to the removal efficiency of mercury, in waste gas, the clearance stable maintenance of mercury vapour is more than 95%.
Embodiment 2
In the present embodiment, in waste gas, the concentration of mercury is 5mg/m
3, waste gas tolerance is 3m
3/ h, absorbing liquid select concentration be 1% sodium bisulfide solution, pH is adjusted to 9, and temperature is 30 DEG C, and adopt two-stage series connection membrane contactor, membrane contactor selects hydrophobic polypropylene hollow fiber film assembly, and its blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5.
A kind of mercuryvapour absorption process, comprises the following steps:
A, concentration are 5mg/m
3, flow is 3m
3the mercurous waste gas of/h is passed into by blower fan 2 in the tube side of membrane contactor 3 after filter 1, using pH value be 9, temperature is 30 DEG C, the sodium bisulfide solution of mass percent concentration 3% and potassium hydrogen sulfide solution is as absorbing liquid, absorbing liquid passes in the shell side of membrane contactor 3 by constant flow pump 4, mercurous waste gas, through the microporous polymer film in membrane contactor 3 and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation; Membrane contactor 3 selects hydrophobic polypropylene hollow fiber film assembly, and its material is polypropylene and polyethylene, and blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5; Membrane contactor 3 adopts two-stage series connection;
Clean gas after B, absorption cleaning is discharged from membrane contactor 3, and enter in absorbing liquid tank 6 after the absorbing liquid containing precipitation filters out precipitation by deposition filter 5, absorbing liquid recycles and carries out continuous absorption.
After the process of the present embodiment method, the concentration that membrane contactor 3 exports mercury vapour is 0.22mg/m
3, be 95.6%, after continuous absorption is administered to the removal efficiency of mercury, in waste gas, the clearance stable maintenance of mercury vapour is more than 95%.
Embodiment 3
A kind of mercuryvapour absorption process, comprises the following steps:
A, concentration are 2mg/m
3, flow is 2m
3the mercurous waste gas of/h is passed into by blower fan 2 in the tube side of membrane contactor 3 after filter 1, using pH value be 9, temperature is 10 DEG C, the sodium chloride solution of mass percent concentration 2% and Klorvess Liquid be as absorbing liquid, absorbing liquid passes in the shell side of membrane contactor 3 by constant flow pump 4, mercurous waste gas, through the microporous polymer film in membrane contactor 3 and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation; Membrane contactor 3 selects hydrophobic polypropylene hollow fiber film assembly, and its material is polyvinylidene fluoride, and blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5; Membrane contactor 3 adopts two-stage series connection;
Clean gas after B, absorption cleaning is discharged from membrane contactor 3, and enter in absorbing liquid tank 6 after the absorbing liquid containing precipitation filters out precipitation by deposition filter 5, absorbing liquid recycles and carries out continuous absorption.
After the process of the present embodiment method, the concentration that membrane contactor 3 exports mercury vapour is 0.074mg/m
3, be 96.3%, after continuous absorption is administered to the removal efficiency of mercury, in waste gas, the clearance stable maintenance of mercury vapour is more than 95%.
Embodiment 4
A kind of mercuryvapour absorption process, comprises the following steps:
A, concentration are 3mg/m
3, flow is 2.5m
3the mercurous waste gas of/h is passed into by blower fan 2 in the tube side of membrane contactor 3 after filter 1, using pH value be 8, temperature is 15 DEG C, the sodium sulfide solution of mass percent concentration 5%, potassium sulfide solution, sodium bisulfide solution, potassium hydrogen sulfide solution, sodium chloride solution, Klorvess Liquid, sodium hydroxide solution and potassium hydroxide solution be as absorbing liquid, absorbing liquid passes in the shell side of membrane contactor 3 by constant flow pump 4, mercurous waste gas, through the microporous polymer film in membrane contactor 3 and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation; Membrane contactor 3 selects hydrophobic polypropylene hollow fiber film assembly, and its material is polytetrafluoroethylene (PTFE), polyvinylidene fluoride, polypropylene and polyethylene, and blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5; Membrane contactor 3 adopts two-stage parallel connection;
Clean gas after B, absorption cleaning is discharged from membrane contactor 3, and enter in absorbing liquid tank 6 after the absorbing liquid containing precipitation filters out precipitation by deposition filter 5, absorbing liquid recycles and carries out continuous absorption.
After the process of the present embodiment method, the concentration that membrane contactor 3 exports mercury vapour is 0.12mg/m
3, be 96.1%, after continuous absorption is administered to the removal efficiency of mercury, in waste gas, the clearance stable maintenance of mercury vapour is more than 95%.
Embodiment 5
A kind of mercuryvapour absorption process, comprises the following steps:
A, concentration are 1mg/m
3, flow is 1m
3the mercurous waste gas of/h is passed into by blower fan 2 in the tube side of membrane contactor 3 after filter 1, using pH value be 10, temperature is 20 DEG C, the sodium sulfide solution of mass percent concentration 4%, Klorvess Liquid and sodium hydroxide solution be as absorbing liquid, absorbing liquid passes in the shell side of membrane contactor 3 by constant flow pump 4, mercurous waste gas, through the microporous polymer film in membrane contactor 3 and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation; Membrane contactor 3 selects hydrophobic polypropylene hollow fiber film assembly, and its material is polytetrafluoroethylene (PTFE), polyvinylidene fluoride, polypropylene and polyethylene, and blade diameter length ratio is 0.2, and load factor is 0.3, and voidage is 0.5;
Clean gas after B, absorption cleaning is discharged from membrane contactor 3, and enter in absorbing liquid tank 6 after the absorbing liquid containing precipitation filters out precipitation by deposition filter 5, absorbing liquid recycles and carries out continuous absorption.
After the process of the present embodiment method, the concentration that membrane contactor 3 exports mercury vapour is 0.032mg/m
3, be 96.8%, after continuous absorption is administered to the removal efficiency of mercury, in waste gas, the clearance stable maintenance of mercury vapour is more than 95%.
Claims (10)
1. a mercury vapour mercury absorption plant, is characterized in that, described device comprises filter (1), blower fan (2), membrane contactor (3), constant flow pump (4), deposition filter (5), absorbs flow container (6); Described filter (1) is connected by the upper end of blower fan (2) with membrane contactor (3) tube side, described constant flow pump (4) one end is connected with membrane contactor (3) shell side import, the other end is connected with absorption flow container (6) one end, described deposition filter (5) one end is connected with membrane contactor (3) shell-side outlet, the other end is connected with absorption flow container (6) other end, described membrane contactor (3) tube side gas vent external connection row vacant duct.
2. mercury vapour absorption plant according to claim 1, is characterized in that, described membrane contactor (3) is hydrophobic hollow fiber membrane module.
3. mercury vapour absorption plant according to claim 2, is characterized in that, described membrane contactor (3) is at least one.
4. mercury vapour absorption plant according to claim 3, is characterized in that, described membrane contactor (3) is for adopting in parallel or series system connection time two or more.
5. mercury vapour absorption plant according to claim 2, is characterized in that, it is characterized in that, in described hydrophobic hollow fiber membrane module, material is microporous polymer film.
6. mercury vapour absorption plant according to claim 5, is characterized in that, described microporous polymer film is a kind of in polytetrafluoroethylene (PTFE), polyvinylidene fluoride, polypropylene, polyethylene or material that any several component is formulated.
7. mercury vapour absorption plant according to claim 1, is characterized in that, it is characterized in that, described deposition filter (5) is gauze filter, a kind of or several arbitrarily combination in sand-like filter, membranaceous filter.
8. the absorption process of mercury vapour absorption plant according to claim 1, is characterized in that, comprise the following steps:
A, the absorbing liquid absorbed in flow container (6) pass in the shell side of membrane contactor (3) through constant flow pump (4), mercurous waste gas is passed in the tube side of membrane contactor (3) by blower fan (2) after filter (1), mercurous waste gas, through the microporous polymer film in membrane contactor (3) and absorbing liquid generation chemical reaction, generates mercuric sulphide precipitation;
Clean gas after B, absorption cleaning is discharged from membrane contactor (3), and the absorbing liquid containing precipitation enters in absorbing liquid tank (6) after filtering out precipitation by deposition filter (5), and absorbing liquid recycles.
9. the absorption process of mercury vapour absorption plant according to claim 8, it is characterized in that, described absorbing liquid is a kind of or several arbitrarily combination in the sodium sulfide solution of mass percent concentration 1%-5%, potassium sulfide solution, sodium bisulfide solution, potassium hydrogen sulfide solution, sodium chloride solution, Klorvess Liquid, sodium hydroxide solution, potassium hydroxide solution.
10. the absorption process of mercury vapour absorption plant according to claim 8, is characterized in that: described absorbing liquid pH value is 8-10, and temperature is 10-30 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510092611.8A CN104722188A (en) | 2015-03-02 | 2015-03-02 | Mercury vapor absorbing device and mercury vapor absorbing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092611.8A CN104722188A (en) | 2015-03-02 | 2015-03-02 | Mercury vapor absorbing device and mercury vapor absorbing method |
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| CN104722188A true CN104722188A (en) | 2015-06-24 |
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| CN201510092611.8A Pending CN104722188A (en) | 2015-03-02 | 2015-03-02 | Mercury vapor absorbing device and mercury vapor absorbing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642126A (en) * | 2016-01-04 | 2016-06-08 | 华东理工大学 | Modification method of polypropylene hollow fiber membrane and application of polypropylene hollow fiber membrane in mercury removal of waste gas |
| CN106734171A (en) * | 2017-01-10 | 2017-05-31 | 昆明理工大学 | A kind of transportable stabilized method of state mercury of soil |
| CN108043864A (en) * | 2017-12-12 | 2018-05-18 | 中国恩菲工程技术有限公司 | The removing system of flying dust Zhong bioxin and mercury metal |
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| CN101053752A (en) * | 2007-02-09 | 2007-10-17 | 上海大学 | Method for removing mercury in flue gas |
| CN104220144A (en) * | 2012-03-22 | 2014-12-17 | 沙特阿拉伯石油公司 | Method for removing mercury from a gaseous or liquid stream |
| CN204093288U (en) * | 2014-08-29 | 2015-01-14 | 甘肃瓮福化工有限责任公司 | A kind of absorption plant improving iodine absorptivity |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043928A (en) * | 2004-08-05 | 2007-09-26 | 电力研究所有限公司 | Reactive membrane process for the removal of vapor phase contaminants |
| CN101053752A (en) * | 2007-02-09 | 2007-10-17 | 上海大学 | Method for removing mercury in flue gas |
| CN104220144A (en) * | 2012-03-22 | 2014-12-17 | 沙特阿拉伯石油公司 | Method for removing mercury from a gaseous or liquid stream |
| CN204093288U (en) * | 2014-08-29 | 2015-01-14 | 甘肃瓮福化工有限责任公司 | A kind of absorption plant improving iodine absorptivity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642126A (en) * | 2016-01-04 | 2016-06-08 | 华东理工大学 | Modification method of polypropylene hollow fiber membrane and application of polypropylene hollow fiber membrane in mercury removal of waste gas |
| CN105642126B (en) * | 2016-01-04 | 2018-04-27 | 华东理工大学 | A kind of method of modifying of polypropylene hollow fiber membrane and its application in exhaust gas demercuration |
| CN106734171A (en) * | 2017-01-10 | 2017-05-31 | 昆明理工大学 | A kind of transportable stabilized method of state mercury of soil |
| CN108043864A (en) * | 2017-12-12 | 2018-05-18 | 中国恩菲工程技术有限公司 | The removing system of flying dust Zhong bioxin and mercury metal |
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