CN101168114A - Chlorine adsorption device generated by electrolyzing fused chloride anode and adsorption method - Google Patents
Chlorine adsorption device generated by electrolyzing fused chloride anode and adsorption method Download PDFInfo
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- CN101168114A CN101168114A CNA2007100560037A CN200710056003A CN101168114A CN 101168114 A CN101168114 A CN 101168114A CN A2007100560037 A CNA2007100560037 A CN A2007100560037A CN 200710056003 A CN200710056003 A CN 200710056003A CN 101168114 A CN101168114 A CN 101168114A
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- chlorine
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Abstract
Disclosed is an absorption method of chlorine which is produced in the processing of electrolyzing and melting the positive pole of chloridate. The components of the used devices include a dust accumulator (1), a chlorine suction tube (2), a centrifugal dust separator (3), a middle tube (4), a fan (5), a connecting tube (4) and a unit (7), wherein the unit (7) further comprises a highly-effective purification tower (8), a submerged pump (9), a liquid storage groove (10), an absorption liquid tube (11), a water-gas separator (12), a pipe (13), a highly-effective purification tower (14) and a chlorine discharging opening (15). The centrifugal dust separator is used to separate the gas from the dust before exhaust gas enters the purification tower, avoiding the dust penetrating into a liquid storage box and the purification tower. Iron powder instead of the common used iron scurf is employed as a reducing agent, reducing the damage of the iron scurf to a motor. The number of the highly-effective purification tower can be increased according to the amount of the chlorine and the absorption effect of the chlorine. The integral set is high in absorption rate of the chlorine, and the amount of the chlorine in the waste gas is less than three ppm.
Description
Technical field
The present invention relates to chemical industry, technical field of metallurgical equipment, specifically the chlorine absorption unit and the absorption process of a cover electrolyzing fused chloride anode generation.
Background technology
The fused chloride electrolysis is the common method of many alloys such as preparation lithium metal, magnesium metal, rare earth metal and magnesium lithium, magnesium calcium, aluminium strontium, rare earth aluminium, rare earth magnesium, and the recycling that anode produces chlorine is the thing that part makes the metallurgy industry headache always.The chlorine chemical property is active, and is soluble in water, and unpleasant penetrating odor is arranged, the serious harm health, and hardware or building had serious corrosion.The amount of chlorine that the quantity-produced electrolytic industry produces is bigger, must handle absorption as much as possible, otherwise can greatly destroy environment.
Chlorine absorbs and generally absorbs with alkali lye or the ferrous chloride absorption, alkali lye mainly is NaOH or limewash, byproduct is clorox or bleaching powder, amount is big and can not recycle, store, transportation trouble (rare earth (in), the 153-154 page or leaf, Xu Guangxian chief editor, metallurgical industry publishing house 2002 Beijing).
Summary of the invention
In order to reduce the pollution of alkali lye and byproduct, the invention provides the chlorine absorption that a cover electrolyzing fused chloride anode produces to environment.Mainly solve the absorption problem of chlorine, also environment is not damaged.
Below in conjunction with accompanying drawing 1, to method of the present invention is that the device of usefulness is specifically described: the chlorine absorption unit that electrolyzing fused chloride anode produces has dust collection 1, chlorine intake line 2, cyclone dust collectors 3, intermediate conduit 4, blower fan 5, connecting pipe 6 and unit 7; Chlorine intake line 2 is connected with cyclone dust collectors 3 middle parts, and cyclone dust collectors 3 tops are connected with intermediate conduit 4, and intermediate conduit 4 links to each other with blower fan 5 inlets, and blower fan 5 outlets are connected with connecting pipe 6, and connecting pipe 6 is access unit 7 again.
There are efficient purifying column 8, submerged pump 9, reservoir 10, absorption liquid pipe 11, steam-water separator 12, pipeline 13, efficient purifying column 14 and chlorine outlet 15 in described unit 7;
Connecting pipe 6 links to each other with efficient purifying column 8 bottoms, efficient purifying column 8 top connecting pipes 13, pipeline 13 links to each other with efficient purifying column 14 bottoms, efficient purifying column 8 is connected reservoir 10 with efficient purifying column 14, submerged pump 9 links to each other with absorption liquid pipe 11 with reservoir 10, absorption liquid pipe 11 connects efficient purifying column 8 and efficient purifying column 14, and steam-water separator 12 is placed in efficient purifying column 8 and efficient purifying column 14 tops respectively.
The present invention adopts ferrous chloride to absorb chlorine oxidation becomes ferric trichloride, becomes ferrous chloride recycling with iron powder reducing again, and ferric trichloride is the sewage disposal common agents, is convenient to market goods locally.The waste gas that the chlorine that produces in view of fused salt chlorimation thing electrolytic anode and the air in the electrolytic cell sky are formed, always take the volatile matter of electrolyte and cathode product out of, waste gas is before the process purifying column, tail gas is removed earlier most of graininess dust in cyclone dust collectors, reduce dust and enter reservoir and purifying column, pollute absorption liquid, and the recyclable utilization of volatile matter; Iron filings commonly used are in the past made reducing agent, and the inventor replaces iron filings with iron powder, reduce the fretting wear of iron filings to motor, prolong motor service life; Device of the present invention can use one or more sets efficient purifying columns, or serial or parallel connection uses; Equipment in parallel can use by turns, guarantees the continuity of production, also can prolong the life-span of consumable accessorys such as motor, blower fan simultaneously, also provides the sufficient time for regeneration of absorption solution.The present invention is simple in structure, and is safe and reliable, the dust removal efficiency height, and the chlorine assimilation effect reaches discharging standards, and the highest permission discharge standard of chlorine pollutant country is 21ppm.Use device provided by the invention, the tail gas chlorinity is less than 3 ppm, if the tail gas chlorinity is higher than 3 ppm, just have Lou chlorine alarm prompting, need to change the ferrous chloride absorption liquid, adjust more exchange device of chlorine absorption technique conditioned disjunction, guarantee that chlorinity in the waste gas is far below national standard; Ferrous chloride absorption liquid recyclable regenerative utilizes, and has reduced second environmental pollution.
The step and the condition of the chlorine absorption process that electrolyzing fused chloride anode produces are as follows:
The tail gas that electrolysis produces enters cyclone dust collectors 3 from chlorine intake line 2, owing to be subjected to centrifugal action, dust drops in the dust collection 1 along the deduster inwall, and the dust of collection will in time be cleared up; Dispose the tail gas of dust,, under the suction of the blower fan 5 of high-quality axle sealing circle, enter unit 7 through intermediate conduit 4 and connecting pipe 6 from cyclone dust collectors 3 tops adopting the corrosion-proof and high-strength impeller; In unit 7, with submerged pump 9 the ferrous chloride solution in the reservoir 10 is upwards sent to efficient purifying column 8 tops through absorption liquid pipe 11, spray downwards, with the abundant haptoreaction of tail gas that rises,
Reaction equation is: Fe+Cl
2=FeCl
2, 2FeCl
2+ Cl
2=2FeCl
3,
Reacted tail gas is discharged from pipeline 13, enters next efficient purifying column 14, continues spray, and reaction equation is the same; At last, discharge from chlorine outlet 15;
Efficient purifying column 8 and 14 pushes up dress steam-water separator 12 respectively, guarantees that the gas that pipeline 13 and chlorine outlet 15 are discharged does not contain liquid, finishes the chlorine absorption that electrolyzing fused chloride anode produces.
Chlorinity＜3ppm in the waste gas of the present invention is lower than state emission standard.
If the chlorine assimilation effect is undesirable, will through one or two unit 7 sprays, absorption, can reach discharge standard again from the tail gas of pipeline 15 discharges.
Ferric trichloride concentration in the described reservoir 10 is less than 40% o'clock, the chlorine good absorbing effect; Ferric trichloride concentration is between 40%～60%, and the chlorine assimilation effect is general; If ferric trichloride concentration surpasses 60%, in the time of no longer absorbing chlorine, can add iron powder, carry out reducing/regenerating, reaction equation is 2FeCl
3+ Fe=3FeCl
2After using a period of time,, iron powder reducing can not added, and ferric trichloride concentration can be discharged greater than 60% o'clock from end opening because the amount that ferric trichloride gathers increases.With its collection, sell as byproduct.
Beneficial effect: be characterized in before tail gas enters purifying column, adopt cyclone dust collectors,, avoid dust to enter liquid reserve tank and purifying column gas and dust separation; Reducing agent adopts iron powder to replace the iron filings that in the past adopted usually, has reduced the destruction of iron filings to motor; What and the chlorine that can look chlorine output are absorbed the different situations of effect, increase the quantity of efficient purifying column, can adopt two covers or many covering devices serial or parallel connection to use.Complete equipment chlorine absorptivity height reaches national requirements for environmental protection, and adopts the fiberglass material, and is anticorrosion, high temperature resistant, the life-span is long.Chlorinity＜3ppm in the waste gas of device provided by the invention is lower than state emission standard.
Description of drawings
Fig. 1 is the structural representation of the chlorine absorption unit of electrolyzing fused chloride anode generation.
Among the figure, the 1st, dust collection, the 2nd, chlorine intake line, the 3rd, cyclone dust collectors, the 4th, intermediate conduit, the 5th, blower fan, the 6th, connecting pipe, 7 is unit; Described unit 7 has 8 to be efficient purifying columns, the 9th, submerged pump, the 10th, and reservoir, the 11st, absorption liquid pipe, the 12nd, steam-water separator, the 13rd, pipeline, the 14th, efficient purifying column and 15 are chlorine outlets.
The specific embodiment
Constituting of the device that uses: dust collection 1, chlorine intake line 2, cyclone dust collectors 3, intermediate conduit 4, blower fan 5, connecting pipe 6 and unit 7; Chlorine intake line 2 is connected with cyclone dust collectors 3 middle parts, and cyclone dust collectors 3 tops are connected with intermediate conduit 4, and intermediate conduit 4 links to each other with blower fan 5 inlets, and blower fan 5 outlets are connected with connecting pipe 6, and connecting pipe 6 is access unit 7 again;
There are efficient purifying column 8, submerged pump 9, reservoir 10, absorption liquid pipe 11, steam-water separator 12, pipeline 13, efficient purifying column 14 and chlorine outlet 15 in described unit 7; Connecting pipe 6 links to each other with efficient purifying column 8 bottoms, efficient purifying column 8 top connecting pipes 13, pipeline 13 links to each other with efficient purifying column 14 bottoms, efficient purifying column 8 is connected reservoir 10 with efficient purifying column 14, submerged pump 9 links to each other with absorption liquid pipe 11 with reservoir 10, absorption liquid pipe 11 connects efficient purifying column 8 and efficient purifying column 14, and steam-water separator 12 is placed in efficient purifying column 8 and efficient purifying column 14 tops respectively.
The step and the condition of the using method of the chlorine absorption unit that electrolyzing fused chloride anode produces are as follows:
Faradaic current 2000A, 880 ℃ of temperature per hour produce 4kg chlorine; The tail gas that contains chlorine that electrolysis produces enters cyclone dust collectors 3 from intake line 2, owing to be subjected to centrifugal action, dust drops in the dust collection 1 along the deduster inwall, and the dust of collection will in time be cleared up.Dispose the tail gas that contains chlorine of dust,, under the suction of the blower fan 5 of high-quality axle sealing circle, enter unit 7 through intermediate conduit 4 and connecting pipe 6 from cyclone dust collectors 3 tops adopting the corrosion-proof and high-strength impeller; In unit 7, with submerged pump 9 the ferrous chloride solution in the reservoir 10 is upwards arrived efficient purifying column 8 tops through absorption liquid pipe 11, spray downwards, with the abundant haptoreaction of tail gas that rises, reaction equation is Fe+Cl
2=FeCl
2, 2FeCl
2+ Cl
2=2FeCl
3, reacted tail gas is discharged from pipeline 13, enters next efficient purifying column 14, continues spray, discharges from chlorine outlet 15 at last.Efficient purifying column 8 and 14 is top-loaded with steam-water separator 12, guarantees that the gas that pipeline 13 and chlorine outlet 15 go out does not contain liquid.When ferric trichloride concentration surpasses 60%, in the time of no longer absorbing chlorine, can add iron powder, carry out reducing/regenerating; After using a period of time,, iron powder reducing can not added, and ferric trichloride concentration can be discharged greater than 60% o'clock from end opening because the amount that ferric trichloride gathers increases.With its collection, sell as byproduct.Chlorinity＜1ppm in the waste gas of present embodiment.
If the chlorine assimilation effect is undesirable, will be from the tail gas of pipeline 15 discharges, again through one or two unit 7 sprays, absorption, until reaching discharge standard.
The absorption plant that uses is identical with the device among the embodiment 1;
Step and condition that concrete chlorine absorbs are as follows: Faradaic current 1000A, 900 ℃ of temperature, per hour produce chlorine 3kg, the tail gas that electrolysis produces enters cyclone dust collectors 3 from chlorine intake line 2, owing to be subjected to centrifugal action, dust drops in the dust collection 1 along the deduster inwall, and the dust of collection will in time be cleared up.Dispose the tail gas of dust,, under the suction of the blower fan 5 of high-quality axle sealing circle, enter unit 7 through intermediate conduit 4 and connecting pipe 6 from cyclone dust collectors 3 tops adopting the corrosion-proof and high-strength impeller; In unit 7, with submerged pump 9 the ferrous chloride solution in the reservoir 10 is upwards sent to efficient purifying column 8 tops through absorption liquid pipe 11, spray downwards, with the abundant haptoreaction of tail gas that rises, reaction equation is Fe+Cl
2=FeCl
2, 2FeCl
2+ Cl
2=2FeCl
3, reacted tail gas is discharged from pipeline 13, enters next efficient purifying column 14, continues spray, discharges from chlorine outlet 15 at last.Efficient purifying column 8 and 14 is top-loaded with steam-water separator 12, guarantees that the gas that pipeline 13 and chlorine outlet 15 go out does not contain liquid.During the chlorinity of the gas of emptying＞3ppm, report to the police leaking chlorine alarm place; When ferric trichloride concentration surpasses 60%, in the time of no longer absorbing chlorine, can add iron powder, carry out reducing/regenerating; After using a period of time,, iron powder reducing can not added, and ferric trichloride concentration can be discharged greater than 60% o'clock from end opening because the amount that ferric trichloride gathers increases.With its collection, sell as byproduct.Chlorinity＜2ppm in the present embodiment waste gas is lower than state emission standard.
If the chlorine assimilation effect is undesirable, the tail gas of discharging from pipeline 15 through one or two unit 7 sprays, absorption, can be reached discharge standard again.
Claims (5)
1. the chlorine absorption process of electrolyzing fused chloride anode generation is characterized in that the device of use constitutes: dust collection 1, chlorine intake line 2, cyclone dust collectors 3, intermediate conduit 4, blower fan 5, connecting pipe 6 and unit 7; Chlorine intake line 2 is connected with cyclone dust collectors 3 middle parts, and cyclone dust collectors 3 tops are connected with intermediate conduit 4, and intermediate conduit 4 links to each other with blower fan 5 inlets, and blower fan 5 outlets are connected with connecting pipe 6, and connecting pipe 6 is access unit 7 again;
There are efficient purifying column 8, submerged pump 9, reservoir 10, absorption liquid pipe 11, steam-water separator 12, pipeline 13, efficient purifying column 14 and chlorine outlet 15 in described unit 7; Connecting pipe 6 links to each other with efficient purifying column 8 bottoms, efficient purifying column 8 top connecting pipes 13, pipeline 13 links to each other with efficient purifying column 14 bottoms, efficient purifying column 8 is connected reservoir 10 with efficient purifying column 14, submerged pump 9 links to each other with absorption liquid pipe 11 with reservoir 10, absorption liquid pipe 11 connects efficient purifying column 8 and efficient purifying column 14, and steam-water separator 12 is placed in efficient purifying column 8 and efficient purifying column 14 tops respectively;
Step and condition are as follows: the tail gas that electrolysis produces enters cyclone dust collectors 3 from chlorine intake line 2, owing to be subjected to centrifugal action, dust drops in the dust collection 1 along the deduster inwall, and the dust of collection will in time be cleared up; Dispose the tail gas of dust,, under the suction of the blower fan 5 of high-quality axle sealing circle, enter unit 7 through intermediate conduit 4 and connecting pipe 6 from cyclone dust collectors 3 tops adopting the corrosion-proof and high-strength impeller; In unit 7, with submerged pump 9 the ferrous chloride solution in the reservoir 10 is upwards sent to efficient purifying column 8 tops through absorption liquid pipe 11, spray downwards, with the abundant haptoreaction of tail gas that rises,
Reaction equation is: Fe+Cl
2=FeCl
2, 2FeCl
2+ Cl
2=2FeCl
3,
Reacted tail gas is discharged from pipeline 13, enters next efficient purifying column 14, continues spray, and reaction equation is the same; At last, discharge from chlorine outlet 15;
Efficient purifying column 8 and 14 pushes up dress steam-water separator 12 respectively, guarantees that the gas that pipeline 13 and chlorine outlet 15 are discharged does not contain liquid, finishes the chlorine absorption that electrolyzing fused chloride anode produces.
2. the chlorine absorption process that electrolyzing fused chloride anode as claimed in claim 1 produces is characterized in that described unit 7 is two.
3. when the chlorine assimilation effect is undesirable, will be from the tail gas of pipeline 15 discharges, again through a unit 7 sprays, absorption.
4. the chlorine absorption process that electrolyzing fused chloride anode as claimed in claim 1 produces is characterized in that,, in the time of no longer absorbing chlorine, can add iron powder, carry out reducing/regenerating, reaction equation is 2FeCl
3+ Fe=3FeCl
2
5. the chlorine absorption process that electrolyzing fused chloride anode as claimed in claim 1 produces, it is characterized in that, ferric trichloride concentration in the described reservoir 10 surpasses 60%, because the amount that ferric trichloride gathers increases, can not add iron powder reducing, ferric trichloride is being collected from the end opening discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100560037A CN101168114A (en) | 2007-08-28 | 2007-08-28 | Chlorine adsorption device generated by electrolyzing fused chloride anode and adsorption method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100560037A CN101168114A (en) | 2007-08-28 | 2007-08-28 | Chlorine adsorption device generated by electrolyzing fused chloride anode and adsorption method |
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|---|---|
| CN101168114A true CN101168114A (en) | 2008-04-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091527A (en) * | 2010-12-23 | 2011-06-15 | 何卫东 | Method and device for absorbing waste chlorine generated in lithium production process by utilizing iron powder |
| CN102728195A (en) * | 2011-04-12 | 2012-10-17 | 陆宏卿 | Chlorine gas absorption device |
| CN103143235A (en) * | 2013-02-28 | 2013-06-12 | 包头稀土研究院 | Method for treating tail gas during production process for rare-earth metals and alloys |
| CN106219612A (en) * | 2016-06-30 | 2016-12-14 | 栗晓光 | A kind of processing method of waste chlorine |
| CN115888393A (en) * | 2023-01-09 | 2023-04-04 | 云南国钛金属股份有限公司 | Molten salt chlorinated chlorine absorption circulating system and method |
-
2007
- 2007-08-28 CN CNA2007100560037A patent/CN101168114A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091527A (en) * | 2010-12-23 | 2011-06-15 | 何卫东 | Method and device for absorbing waste chlorine generated in lithium production process by utilizing iron powder |
| CN102728195A (en) * | 2011-04-12 | 2012-10-17 | 陆宏卿 | Chlorine gas absorption device |
| CN103143235A (en) * | 2013-02-28 | 2013-06-12 | 包头稀土研究院 | Method for treating tail gas during production process for rare-earth metals and alloys |
| CN103143235B (en) * | 2013-02-28 | 2014-09-03 | 包头稀土研究院 | Method for treating tail gas during production process for rare-earth metals and alloys |
| CN106219612A (en) * | 2016-06-30 | 2016-12-14 | 栗晓光 | A kind of processing method of waste chlorine |
| CN106219612B (en) * | 2016-06-30 | 2017-12-22 | 栗晓光 | A kind of processing method of waste chlorine |
| CN115888393A (en) * | 2023-01-09 | 2023-04-04 | 云南国钛金属股份有限公司 | Molten salt chlorinated chlorine absorption circulating system and method |
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Owner name: CHANGCHUN INST. OF APPLIED CHEMISTRY, CHINESE ACA Free format text: FORMER OWNER: CHANGCHUN INST. OF APPLIED CHEMISTRY, CHINESE ACADEMY OF SCIENCES Effective date: 20080725 |
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Effective date of registration: 20080725 Address after: 5625, Renmin Street, Changchun, Jilin Province, China: 130022 Applicant after: Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Co-applicant after: Guangzhou City Kai Tak environmental protection equipment Co., Ltd. Address before: 5625, Renmin Street, Changchun, Jilin Province, China: 130022 Applicant before: Changchun Institue of Applied Chemistry, Chinese Academy of Sciences |
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Open date: 20080430 |