CN104056523A - System for processing exhaust gas of rare earth electrolysis process - Google Patents
System for processing exhaust gas of rare earth electrolysis process Download PDFInfo
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- CN104056523A CN104056523A CN201410321592.7A CN201410321592A CN104056523A CN 104056523 A CN104056523 A CN 104056523A CN 201410321592 A CN201410321592 A CN 201410321592A CN 104056523 A CN104056523 A CN 104056523A
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Abstract
The invention provides a system for processing exhaust gas of a rare earth electrolysis process. By virtue of the system, the exhaust gas produced after electrolyzing of the rare earth firstly flows through an exhaust gas absorbing device; the exhaust gas is intensively collected and then conveyed to a rear earth recycling device; the residual rare earth in the exhaust gas is recycled, so that the loss of the material is avoided; the exhaust gas after recycling of the rare earth is conveyed to an exhaust gas cooling device, so that the high-temperature electrolysis exhaust gas is cooled, thus direct emission of the high-temperature exhaust gas is avoided; the cooled exhaust gas is conveyed to an exhaust gas purifying device, so that acid gas and dust remaining in the exhaust gas are purified, thus direct emission of the acid gas is avoided; finally, the exhaust gas is conveyed to an exhaust gas neutralizing device, so that the exhaust gas reaches the emission standard, thus safe emission of the electrolysis exhaust gas is achieved.
Description
Technical field
The present invention relates to rare earth preparing technical field, more particularly, relate to a kind of Rare Earth Electrolysis process tail gas treatment system.
Background technology
Rare earth element is active very strong metal, is difficult to extract from its compound by general method under usual conditions.In industrial production, the main method of fused salt electrolysis process and metallothermic reduction that adopts is produced rare earth metal or its alloy by monobutyltin trichloride thing, fluoride and the oxide of rare earth.
The electrolysis of rare earth dissolved salt is to take rare earth oxide as main material, produces a kind of technique of rare earth metal and rare earth alloy by electrolytic method.In electrolysis reflection process, can produce certain acidic materials such as fluorinated gas and rare earth dust in existing rare earth oxide electrolysis production process, sour gas and dust that electrolysis is produced generally do not process, directly to outside drain, not only have a strong impact on operating personnel's life safety, also can produce acidity and dust pollution to atmospheric environment.
Therefore, how reducing the discharge of sour gas and dust in Rare Earth Electrolysis, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of Rare Earth Electrolysis process tail gas treatment system, to realize the discharge that reduces sour gas and dust in Rare Earth Electrolysis.
In order to achieve the above object, the invention provides following technical scheme:
A Rare Earth Electrolysis process tail gas treatment system, comprises electrolysis tail gas is concentrated to the device for absorbing tail gas absorbing; Be connected the rare earth retracting device that the rare earth in electrolysis tail gas is reclaimed with described device for absorbing tail gas; Be connected the tail gas heat sink that the electrolysis tail gas after rare earth is reclaimed is lowered the temperature with described rare earth retracting device; Be connected the exhaust gas cleaner that the electrolysis tail gas after cooling is purified with described tail gas heat sink; And be connected with described exhaust gas cleaner, the electrolysis tail gas after purifying is neutralized to the tail gas neutralising arrangement purifying.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, in described device for absorbing tail gas, be provided with the wind speed absorber that electrolysis tail gas is absorbed.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, described rare earth retracting device comprises the centrifugal retracting device that the rare earth in electrolysis tail gas that is linked in sequence reclaims and the rare earth in the electrolysis tail gas after centrifugal is carried out to the fine filtering apparatus that essence reclaims.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, in described centrifugal retracting device, be provided with the rare earth in electrolysis tail gas is carried out to the retracting device that the centrifugal dirt of control of dust falls.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, in described fine filtering apparatus, be provided with the particulate membrane filtration plate retracting device that the rare earth in electrolysis tail gas is reclaimed.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, in described tail gas heat sink, be provided with the tail gas heat sink that high-temperature electrolysis tail gas is carried out to shower water cooling.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, between described tail gas heat sink and described exhaust gas cleaner, be also sequentially set with the fluorine gas in electrolysis tail gas is carried out to the spray cleaning device of spray cleaning and the hydrometallurgic recovery device that the rare earth in the electrolysis tail gas after spray cleaning is reclaimed.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, described exhaust gas cleaner comprises and is disposed in order the first purifying column, the second purifying column and the 3rd purifying column that the gas in electrolysis tail gas is purified.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, after described tail gas neutralising arrangement, be also provided with the demister that electrolysis tail gas is carried out to demist work.
Preferably, in above-mentioned Rare Earth Electrolysis process tail gas treatment system, on described rare earth retracting device and described hydrometallurgic recovery device, be connected with the rare earth harvester that the rare earth after reclaiming is collected.
Rare Earth Electrolysis process tail gas treatment system provided by the invention, comprises electrolysis tail gas is concentrated to the device for absorbing tail gas absorbing; Be connected the rare earth retracting device that the rare earth in electrolysis tail gas is reclaimed with device for absorbing tail gas; Be connected the tail gas heat sink that the electrolysis tail gas after rare earth is reclaimed is lowered the temperature with rare earth retracting device; Be connected the exhaust gas cleaner that the electrolysis tail gas after cooling is purified with tail gas heat sink; And be connected with exhaust gas cleaner, the electrolysis tail gas after purifying is neutralized to the tail gas neutralising arrangement purifying.Tail gas after Rare Earth Electrolysis is first through device for absorbing tail gas, and tail gas, by centralized collection, is then sent to rare earth retracting device, and rare earth remaining in tail gas is reclaimed, and avoids the loss of material.Tail gas after recovering rare earth is sent to tail gas heat sink, electrolysis tail gas to high temperature is lowered the temperature, avoid the direct discharge of high-temperature tail gas, after cooling, send into exhaust gas cleaner, sour gas remaining in tail gas and dust etc. are purified, avoid the direct discharge of sour gas, finally by tail gas neutralising arrangement, make tail gas reach discharge standard, realize the safety dumping of electrolysis tail gas.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the technique syndeton schematic diagram of Rare Earth Electrolysis process tail gas treatment system provided by the invention.
The specific embodiment
The invention discloses a kind of Rare Earth Electrolysis process tail gas treatment system, reduced the discharge of sour gas and dust in Rare Earth Electrolysis.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, Fig. 1 is the technique syndeton schematic diagram of Rare Earth Electrolysis process tail gas treatment system provided by the invention.
The invention provides a kind of Rare Earth Electrolysis process tail gas treatment system, comprise electrolysis tail gas 1 is concentrated to the device for absorbing tail gas 2 absorbing; Be connected the rare earth retracting device that the rare earth in electrolysis tail gas 1 is reclaimed with device for absorbing tail gas 2; Be connected the tail gas heat sink 5 that the electrolysis tail gas after rare earth is reclaimed is lowered the temperature with rare earth retracting device; Be connected the exhaust gas cleaner that the electrolysis tail gas after cooling is purified with tail gas heat sink 5; And be connected with exhaust gas cleaner, the electrolysis tail gas after purifying is neutralized to the tail gas neutralising arrangement 11 purifying.Tail gas after Rare Earth Electrolysis is first through device for absorbing tail gas 2, and tail gas, by centralized collection, is then sent to rare earth retracting device, and rare earth remaining in tail gas is reclaimed, and avoids the loss of material.Tail gas after recovering rare earth is sent to tail gas heat sink 5, electrolysis tail gas to high temperature is lowered the temperature, avoid the direct discharge of high-temperature tail gas, after cooling, send into exhaust gas cleaner, sour gas remaining in tail gas and dust etc. are purified, avoid the direct discharge of sour gas, finally by tail gas neutralising arrangement, make tail gas reach discharge standard, realize the safety dumping of electrolysis tail gas.
In the present invention's one specific embodiment, in device for absorbing tail gas 2, be provided with the wind speed absorber that electrolysis tail gas 1 is absorbed.By the uptake of rational wind speed absorber is set, the discharge rate of the tail gas that cooperation Rare Earth Electrolysis equipment is produced, all absorbs the tail gas after electrolysis, also avoids wind speed absorber to waste too much energy simultaneously.
In the present invention's one specific embodiment, rare earth retracting device comprises the centrifugal retracting device 3 that the rare earth in electrolysis tail gas that is linked in sequence reclaims and the rare earth in the electrolysis tail gas after centrifugal is carried out to the fine filtering apparatus 4 that essence reclaims.Electrolysis tail gas is after all reclaiming, first through centrifugal retracting device 3, the larger rare earth of electrolysis tail gas endoparticle is reclaimed, and then after 4 pairs of fine filtering apparatus are centrifugal, in tail gas, the less rare earth of particle absorbs, and has realized the abundant absorption to rare earth in electrolysis tail gas.
In the present invention's one specific embodiment, in centrifugal retracting device 3, be provided with the rare earth in electrolysis tail gas is carried out to the retracting device that the centrifugal dirt of control of dust falls.Centrifugal retracting device 3 adopts the centrifugal dirt of control of dust to fall mode, is easy to realize the absorption to electrolysis tail gas inner exhaust gas by centrifugal retracting device.
In the present invention's one specific embodiment, in fine filtering apparatus 4, be provided with the particulate membrane filtration plate retracting device that the rare earth in electrolysis tail gas is reclaimed.Fine filtering apparatus 4 adopts particulate membrane filtration plate to carry out essence and reclaims, and guarantees the recovery of the rare earth particulate that particle is less, the recovering effect further guaranteeing.
In the present invention's one specific embodiment, in tail gas heat sink 5, be provided with the tail gas heat sink that high-temperature electrolysis tail gas is carried out to shower water cooling.The tail gas carrying out after rare earth recovery is lowered the temperature by shower water, and tail gas is cooled to normal temperature, reduces the impact of high-temperature tail gas on environment.
In the present invention's one specific embodiment, between tail gas heat sink 5 and exhaust gas cleaner, be also sequentially set with the fluorine gas in electrolysis tail gas is carried out to the spray cleaning device 6 of spray cleaning and the hydrometallurgic recovery device 7 that the rare earth in the electrolysis tail gas after spray cleaning is reclaimed.Tail gas after cooling is by spray cleaning device 6, and the residual rare earth in the process of spray in tail gas can further be absorbed by shower water absorption, by multiple tracks, absorbs reclaimer, guarantees that the rare earth in tail gas is reclaimed completely, avoids the waste of material.
In the present invention's one specific embodiment, exhaust gas cleaner comprises and is disposed in order the first purifying column 8, the second purifying column 9 and the 3rd purifying column 10 that the gas in electrolysis tail gas is purified.Tail gas, through fully absorbing after recovering rare earth, is further evolved three grades of purifying columns to the gas in tail gas or other impurity, dust etc., further improves the degree of purity of tail gas.Then by the sour gas in 11 pairs of tail gas of tail gas neutralising arrangement, neutralize, making the gas after discharging is neutral gas, and after tail gas neutralising arrangement, be provided with the demister that electrolysis tail gas is carried out to demist work, and after demist, obtain the tail gas of qualified discharge, through exhaust apparatus 12, discharge.
In the present invention's one specific embodiment, on rare earth retracting device and hydrometallurgic recovery device 7, be connected with the rare earth harvester 13 that the rare earth after reclaiming is collected.Centrifugal retracting device 3 and fine filtering apparatus 4 and the rear rare earth harvester 13 that is simultaneously connected of hydrometallurgic recovery device 7, after rare earth through reclaiming is collected, realize the recycling to rare earth.
The Rare Earth Electrolysis process tail gas treatment system providing by this case is processed electrolysis tail gas, the treatment and purification rate of electrolysis tail gas can reach more than 98.5%, after purifying, the index of electrolysis tail gas reaches national rare earth emission request, the rare earth of this system recoveries can directly return production and application simultaneously, not only make the electrolysis treating tail gas of contaminated environment in enterprise's production be solved, also make to produce raw material loss and reduced 3 percentage points.When having increased the performance of enterprises, saved rare earth resources utilization, Ye Shi enterprise becomes clean, environment-friendly type enterprise.
In this description, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a Rare Earth Electrolysis process tail gas treatment system, is characterized in that, comprises electrolysis tail gas is concentrated to the device for absorbing tail gas absorbing; Be connected the rare earth retracting device that the rare earth in electrolysis tail gas is reclaimed with described device for absorbing tail gas; Be connected the tail gas heat sink that the electrolysis tail gas after rare earth is reclaimed is lowered the temperature with described rare earth retracting device; Be connected the exhaust gas cleaner that the electrolysis tail gas after cooling is purified with described tail gas heat sink; And be connected with described exhaust gas cleaner, the electrolysis tail gas after purifying is neutralized to the tail gas neutralising arrangement purifying.
2. Rare Earth Electrolysis process tail gas treatment system according to claim 1, is characterized in that, is provided with the wind speed absorber that electrolysis tail gas is absorbed in described device for absorbing tail gas.
3. Rare Earth Electrolysis process tail gas treatment system according to claim 1, it is characterized in that, described rare earth retracting device comprises the centrifugal retracting device that the rare earth in electrolysis tail gas that is linked in sequence reclaims and the rare earth in the electrolysis tail gas after centrifugal is carried out to the fine filtering apparatus that essence reclaims.
4. Rare Earth Electrolysis process tail gas treatment system according to claim 3, is characterized in that, in described centrifugal retracting device, is provided with the rare earth in electrolysis tail gas is carried out to the retracting device that the centrifugal dirt of control of dust falls.
5. Rare Earth Electrolysis process tail gas treatment system according to claim 3, is characterized in that, is provided with the particulate membrane filtration plate retracting device that the rare earth in electrolysis tail gas is reclaimed in described fine filtering apparatus.
6. Rare Earth Electrolysis process tail gas treatment system according to claim 1, is characterized in that, is provided with the tail gas heat sink that high-temperature electrolysis tail gas is carried out to shower water cooling in described tail gas heat sink.
7. Rare Earth Electrolysis process tail gas treatment system according to claim 6, it is characterized in that, between described tail gas heat sink and described exhaust gas cleaner, be also sequentially set with the fluorine gas in electrolysis tail gas is carried out to the spray cleaning device of spray cleaning and the hydrometallurgic recovery device that the rare earth in the electrolysis tail gas after spray cleaning is reclaimed.
8. Rare Earth Electrolysis process tail gas treatment system according to claim 1, is characterized in that, described exhaust gas cleaner comprises and is disposed in order the first purifying column, the second purifying column and the 3rd purifying column that the gas in electrolysis tail gas is purified.
9. Rare Earth Electrolysis process tail gas treatment system according to claim 1, is characterized in that, after described tail gas neutralising arrangement, is also provided with the demister that electrolysis tail gas is carried out to demist work.
10. Rare Earth Electrolysis process tail gas treatment system according to claim 7, is characterized in that, is connected with the rare earth harvester that the rare earth after reclaiming is collected on described rare earth retracting device and described hydrometallurgic recovery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410321592.7A CN104056523A (en) | 2014-07-07 | 2014-07-07 | System for processing exhaust gas of rare earth electrolysis process |
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| CN201410321592.7A CN104056523A (en) | 2014-07-07 | 2014-07-07 | System for processing exhaust gas of rare earth electrolysis process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107358A (en) * | 2015-08-31 | 2015-12-02 | 赣州嘉通新材料有限公司 | Rare earth metal smelting tail gas recovery device and method |
| CN105132955A (en) * | 2015-08-25 | 2015-12-09 | 赣州三友稀土新材料有限公司 | Movable rare earth electrolysis cell flue gas absorption device |
| CN105603459A (en) * | 2016-02-03 | 2016-05-25 | 中南大学 | Rare-earth electrolysis fume cleaning system and method |
| CN106693618A (en) * | 2016-12-12 | 2017-05-24 | 余建华 | Harmless treatment system for exhaust and waste gas produced in deep processing of coal tar |
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| US4134755A (en) * | 1976-08-27 | 1979-01-16 | Koichi Maeda | Method for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| CN102247708A (en) * | 2011-07-19 | 2011-11-23 | 北京北科环境工程有限公司 | Process for treating tail gas of rare earth mineral powder and concentrated sulphuric acid roasting process |
| CN203139858U (en) * | 2013-03-18 | 2013-08-21 | 赣州嘉通新材料有限公司 | Novel rare-earth metal electrolytic cleaning device |
| CN203620498U (en) * | 2013-12-19 | 2014-06-04 | 宜兴新威利成稀土有限公司 | Rare-earth waste gas treatment system |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4134755A (en) * | 1976-08-27 | 1979-01-16 | Koichi Maeda | Method for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| CN102247708A (en) * | 2011-07-19 | 2011-11-23 | 北京北科环境工程有限公司 | Process for treating tail gas of rare earth mineral powder and concentrated sulphuric acid roasting process |
| CN203139858U (en) * | 2013-03-18 | 2013-08-21 | 赣州嘉通新材料有限公司 | Novel rare-earth metal electrolytic cleaning device |
| CN203620498U (en) * | 2013-12-19 | 2014-06-04 | 宜兴新威利成稀土有限公司 | Rare-earth waste gas treatment system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132955A (en) * | 2015-08-25 | 2015-12-09 | 赣州三友稀土新材料有限公司 | Movable rare earth electrolysis cell flue gas absorption device |
| CN105107358A (en) * | 2015-08-31 | 2015-12-02 | 赣州嘉通新材料有限公司 | Rare earth metal smelting tail gas recovery device and method |
| CN105603459A (en) * | 2016-02-03 | 2016-05-25 | 中南大学 | Rare-earth electrolysis fume cleaning system and method |
| CN105603459B (en) * | 2016-02-03 | 2018-05-11 | 中南大学 | Rare Earth Electrolysis flue gas purification system and method |
| CN106693618A (en) * | 2016-12-12 | 2017-05-24 | 余建华 | Harmless treatment system for exhaust and waste gas produced in deep processing of coal tar |
| CN106693618B (en) * | 2016-12-12 | 2019-05-17 | 余建华 | The harmless processing system of process tail gas and exhaust gas during a kind of coal tar deep processing |
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Application publication date: 20140924 |