CN102021608A - Device for manufacturing zinc by ZnCl2 molten salt electrolysis - Google Patents
Device for manufacturing zinc by ZnCl2 molten salt electrolysis Download PDFInfo
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- CN102021608A CN102021608A CN2009101956030A CN200910195603A CN102021608A CN 102021608 A CN102021608 A CN 102021608A CN 2009101956030 A CN2009101956030 A CN 2009101956030A CN 200910195603 A CN200910195603 A CN 200910195603A CN 102021608 A CN102021608 A CN 102021608A
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- electrolyzer
- mist eliminator
- salt electrolysis
- fused salt
- zncl
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Abstract
The invention provides a device for manufacturing zinc by ZnCl2 molten salt electrolysis. The device comprises a heating device, an electrolytic bath, a demister, a graphite electrode, a current-conducting rod, a thermoelectric couple, an electrolytic power supply and a chlorine absorption tower. The device for manufacturing the zinc by ZnCl2 molten salt electrolysis can effectively recycle Zn in a by-product ZnCl2 generated by a method for producing polysilicon by using Zn to reduce SiCl4, and can realize a closed loop production process for producing the polysilicon by using the Zn to reduce the SiCl4, so that the aims that the process for producing the polysilicon by using the Zn to reduce the SiCl4 has high efficiency, low energy consumption and zero emission can be fulfilled, and the production cost of the polysilicon is better lowered.
Description
Technical field
The present invention relates to a kind of electrolyzer, particularly a kind of ZnCl
2Fused salt electrolysis system zinc device.
Background technology
The polysilicon purifying technique mainly adopts Siemens Method, improvement Siemens Method, silane decomposition, fluidized bed method, zone melting method of purification (FZ), pulling of crystals method (CZ) or the like.The most sophisticated at present polysilicon purifying technique is the improvement Siemens Method.
Therefore, the improvement Siemens Method is the production method that has comparative advantage at present, and international mainstream manufacturer overwhelming majority polysilicons all are with this method production, accounts for 74% of world production ability in 2004.The improvement Siemens Method is to grow up on traditional Siemens Method technology basis, comprises that mainly hydrogenation, rectification and purification, reduction and tail gas dry process reclaim, and exist a large amount of by product SiCl
4Pollution problem.
China also had large quantities of polysilicon project begun newlies to go into operation at these several years.According to " Chinese photovoltaic industry development report ", to the end of the year 2008, the domestic polysilicon of first phase production capacity of can realizing will reach 18,760 tons.And by 2010, the output of main manufacturer will reach 85250 tons/year.The production of polysilicon line that these newly start except middle silicon company etc. independent research, what other producers utilized is Russian polysilicon purification techniques, but these technology are compared with international advanced technology and also had a certain distance, the by product SiCl of output
4Amount very huge.
At present, reduce SiCl with Zn
4Producing polysilicon becomes focus just gradually, and developed countries such as Japan have begun in recent years to pay attention to that " Zn reduces SiCl
4" this environment protection method produces solar cell starting material polysilicon, and planned its industrialization.
Zn reduces SiCl
4The principle reaction formula be:
SiCl
4(g)+2Zn(g)→Si(s)+2ZnCl
2(g)
The raw material that the Zn reduction method is used is SiCl
4, different with traditional " Siemens Method " material therefor, have that production technique is brief, speed of response is fast, constant product quality, can realize advantage such as cost control.According on September 17th, 2008 " daily magazine news ", new Japanese sun silicon company has planned to begin in April, 2010 to produce solar cell starting material polysilicon with " Zn reduction method ".As seen the production of following polysilicon must be to develop to low-cost, low pollution, by product reusable edible, direction that production technique is brief.
Yet thisly reduce SiCl with Zn
4Produce the method for polysilicon, according to reaction formula SiCl
4(g)+2Zn (g) → Si (s)+2ZnCl
2(g) calculate, the silicon of one times of amount of every production will produce the ZnCl of ten times of amounts
2By product, how economically effective recycling ZnCl
2Become a big problem.
Summary of the invention
Purpose of the present invention is exactly in order to provide a kind of energy efficient recovery Zn reduction SiCl
4Produce the by product ZnCl that produces in the polysilicon method
2In the ZnCl of Zn
2Fused salt electrolysis system zinc device.
Technical scheme of the present invention is: a kind of ZnCl
2Fused salt electrolysis system zinc device, it comprises:
Heating unit is columnar structured, and its border and bottom are sandwich structure, are covered with resistive heater in the interlayer;
Electrolyzer is inlaid in the heating unit;
Mist eliminator is connected the top of electrolyzer, and mist eliminator comprises a cover plate, and cover plate is provided with ZnCl
2Fused salt opening for feed and the outlet of at least one chlorine;
Graphite Electrodes is arranged in pairs in the electrolyzer;
Current conducting rod, its upper end is connected on the mist eliminator cover plate and protrudes upward, and the lower end is stretched in the electrolyzer and is linked to each other with Graphite Electrodes;
Thermopair, its upper end is connected on the mist eliminator cover plate and protrudes upward, and the lower end is stretched in the electrolyzer;
Electrolysis power links to each other with current conducting rod by lead;
Chlorine gas absorption tower links to each other with the chlorine outlet of mist eliminator by gas piping.
Described Graphite Electrodes is the acyclic type electrode, and the monolithic thickness of electrode is that 20～40mm, width are 50～100mm, highly are 100～200mm that two cube electrodes vertically are oppositely arranged, interelectrode distance 2～10mm, and top of electrodes is threaded with current conducting rod.
Described electrolyzer and mist eliminator are made by quartz or zirconia ceramics or silicon nitride ceramics.
The part of described current conducting rod below the mist eliminator cover plate is with porcelain bushing.
The internal diameter of described heating unit is 150～300mm, and heated height is 300～600mm, and the outside is provided with insulating.
The external diameter of described electrolyzer is 150～300mm, highly is 300～600mm.
Also comprise Zn liquid discharging siphon pipe, this siphonal upper end of Zn liquid discharging is connected on the mist eliminator cover plate and outwards draws, and the bottom of electrolyzer is goed deep in the lower end.
ZnCl of the present invention
2Fused salt electrolysis system zinc device can efficient recovery Zn reduction SiCl
4Produce the by product ZnCl that produces in the polysilicon method
2In Zn, can realize Zn reduction SiCl
4Produce polysilicon loop production technology, thereby can make Zn reduction SiCl
4Produce polysilicon process and reach high-level efficiency, less energy-consumption, zero release, reduce the production of polysilicon cost better.Device has the compact construction novelty, make that assembling is simple, the economical operation cost is low, working method is simple and convenient, can realize advantage such as industrialization.
Description of drawings
Fig. 1 is ZnCl of the present invention
2The basic structure synoptic diagram of fused salt electrolysis system zinc device;
Fig. 2 is the plan structure synoptic diagram of the mist eliminator cover plate among the present invention.
Embodiment
Accompanying drawing has provided a preferred embodiment of the present invention, and the invention will be further described below in conjunction with accompanying drawing.
Referring to Fig. 1, cooperate referring to Fig. 2 ZnCl of the present invention
2Fused salt electrolysis system zinc device comprises heating unit 1, electrolyzer 2, mist eliminator 3, Graphite Electrodes 4, current conducting rod 5, thermopair 6, electrolysis power 7 and chlorine gas absorption tower 8.
Heating unit 1 is columnar structured, and its border and bottom are sandwich structure, is covered with resistive heater 11 in the interlayer, the internal diameter of heating unit is 150～300mm, heated height is 300～600mm, and the outside is provided with insulating 12, and Heating temperature can reach 600～800 ℃.
Electrolyzer 2 is inlaid in the heating unit 1 and is suitable with heating unit, and this electrolyzer 2 is made by the stupalith of quartz or corrosion-and high-temp-resistant such as zirconia ceramics or silicon nitride ceramics, and its external diameter is 150～300mm, highly is 300～600mm.
Graphite Electrodes 4 is arranged in pairs in the electrolyzer, Graphite Electrodes 4 is the acyclic type electrode, and the monolithic thickness of electrode is that 20～40mm, width are 50～100mm, highly are 100～200mm that two cube electrodes vertically are oppositely arranged, interelectrode distance 2～10mm, top of electrodes is threaded with current conducting rod 5.
The upper end of current conducting rod 5 is connected on the mist eliminator cover plate 31 and protrudes upward, and the lower end is stretched in the electrolyzer 2 and is threaded with Graphite Electrodes 4, and the part of current conducting rod 5 below the mist eliminator cover plate is with porcelain bushing, is corroded to prevent current conducting rod 5.
The upper end of thermopair 6 is connected on the mist eliminator cover plate 31 and protrudes upward, and the lower end is stretched in the electrolyzer 2, is used to measure the internal temperature of electrolyzer 2.
Chlorine gas absorption tower 8 links to each other with the chlorine outlet 33 of mist eliminator by gas piping 9.
The upper end of Zn liquid discharging siphon pipe 36 is connected on the mist eliminator cover plate and outwards draws, and the bottom of electrolyzer 2 is goed deep in the lower end.Siphon pipe 36 is made as zirconia ceramics, silicon nitride ceramics by quartz or corrosion-and high-temp-resistant pottery.Utilize siphon principle directly the high temperature Zn liquid that electrolysis generated to be incorporated into Zn reduction SiCl
4Zn steam feeder system in the preparation polysilicon can realize Zn reduction SiCl
4Produce the close loop maneuver of the whole technology of polysilicon.
Claims (7)
1. ZnCl
2Fused salt electrolysis system zinc device is characterized in that comprising:
Heating unit is columnar structured, and its border and bottom are sandwich structure, are covered with resistive heater in the interlayer;
Electrolyzer is inlaid in the heating unit;
Mist eliminator is connected the top of electrolyzer, and mist eliminator comprises a cover plate, and cover plate is provided with ZnCl
2Fused salt opening for feed and the outlet of at least one chlorine;
Graphite Electrodes is arranged in pairs in the electrolyzer;
Current conducting rod, its upper end is connected on the mist eliminator cover plate and protrudes upward, and the lower end is stretched in the electrolyzer and is linked to each other with Graphite Electrodes;
Thermopair, its upper end is connected on the mist eliminator cover plate and protrudes upward, and the lower end is stretched in the electrolyzer;
Electrolysis power links to each other with current conducting rod by lead;
Chlorine gas absorption tower links to each other with the chlorine outlet of mist eliminator by gas piping.
2. ZnCl according to claim 1
2Fused salt electrolysis system zinc device, it is characterized in that: described Graphite Electrodes is the acyclic type electrode, and the monolithic thickness of electrode is that 20～40mm, width are 50～100mm, highly are 100～200mm that two cube electrodes vertically are oppositely arranged, interelectrode distance 2～10mm, top of electrodes is threaded with current conducting rod.
3. ZnCl according to claim 1
2Fused salt electrolysis system zinc device is characterized in that: described electrolyzer and mist eliminator are made by quartz or zirconia ceramics or silicon nitride ceramics.
4. ZnCl according to claim 1
2Fused salt electrolysis system zinc device is characterized in that: the part of described current conducting rod below the mist eliminator cover plate is with porcelain bushing.
5. ZnCl according to claim 1
2Fused salt electrolysis system zinc device is characterized in that: the internal diameter of described heating unit is 150～300mm, and heated height is 300～600mm, and the outside is provided with insulating.
6. ZnCl according to claim 1
2Fused salt electrolysis system zinc device is characterized in that: the external diameter of described electrolyzer is 150～300mm, highly is 300～600mm.
7. ZnCl according to claim 1
2Fused salt electrolysis system zinc device is characterized in that: also comprise Zn liquid discharging siphon pipe, this siphonal upper end of Zn liquid discharging is connected on the mist eliminator cover plate and outwards draws, and the bottom of electrolyzer is goed deep in the lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101956030A CN102021608A (en) | 2009-09-11 | 2009-09-11 | Device for manufacturing zinc by ZnCl2 molten salt electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101956030A CN102021608A (en) | 2009-09-11 | 2009-09-11 | Device for manufacturing zinc by ZnCl2 molten salt electrolysis |
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| Publication Number | Publication Date |
|---|---|
| CN102021608A true CN102021608A (en) | 2011-04-20 |
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ID=43863374
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101956030A Pending CN102021608A (en) | 2009-09-11 | 2009-09-11 | Device for manufacturing zinc by ZnCl2 molten salt electrolysis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397371A (en) * | 2013-07-22 | 2013-11-20 | 商丘师范学院 | Novel improved method for preparing ZnO nano-needle array |
| CN106929882A (en) * | 2015-12-31 | 2017-07-07 | 宁波创润新材料有限公司 | Electrolysis unit |
| CN108677218A (en) * | 2018-04-26 | 2018-10-19 | 西安建筑科技大学 | A kind of method that molten-salt electrolysis prepares metallic zinc |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003031666A1 (en) * | 2001-10-03 | 2003-04-17 | Umicore | Chloride melt process for the separation and recovery of zinc |
| WO2008004602A1 (en) * | 2006-07-07 | 2008-01-10 | Kinotech Solar Energy Corporation | Electrolysis system and method |
| WO2009057270A1 (en) * | 2007-10-30 | 2009-05-07 | Kinotech Solar Energy Corporation | Electrolysis system |
| CN201485518U (en) * | 2009-09-11 | 2010-05-26 | 上海太阳能工程技术研究中心有限公司 | ZnCl2 fusion electrolysis zinc production device |
-
2009
- 2009-09-11 CN CN2009101956030A patent/CN102021608A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003031666A1 (en) * | 2001-10-03 | 2003-04-17 | Umicore | Chloride melt process for the separation and recovery of zinc |
| WO2008004602A1 (en) * | 2006-07-07 | 2008-01-10 | Kinotech Solar Energy Corporation | Electrolysis system and method |
| WO2009057270A1 (en) * | 2007-10-30 | 2009-05-07 | Kinotech Solar Energy Corporation | Electrolysis system |
| CN201485518U (en) * | 2009-09-11 | 2010-05-26 | 上海太阳能工程技术研究中心有限公司 | ZnCl2 fusion electrolysis zinc production device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397371A (en) * | 2013-07-22 | 2013-11-20 | 商丘师范学院 | Novel improved method for preparing ZnO nano-needle array |
| CN106929882A (en) * | 2015-12-31 | 2017-07-07 | 宁波创润新材料有限公司 | Electrolysis unit |
| CN108677218A (en) * | 2018-04-26 | 2018-10-19 | 西安建筑科技大学 | A kind of method that molten-salt electrolysis prepares metallic zinc |
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Application publication date: 20110420 |