CN202482489U - Secondary feeding device for polycrystalline silicon cast ingots - Google Patents
Secondary feeding device for polycrystalline silicon cast ingots Download PDFInfo
- Publication number
- CN202482489U CN202482489U CN2011203597336U CN201120359733U CN202482489U CN 202482489 U CN202482489 U CN 202482489U CN 2011203597336 U CN2011203597336 U CN 2011203597336U CN 201120359733 U CN201120359733 U CN 201120359733U CN 202482489 U CN202482489 U CN 202482489U
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- filling tube
- barrel
- tube
- assembly
- air inlet
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Abstract
The utility model relates to a secondary feeding device for polycrystalline silicon cast ingots. The secondary feeding device comprises a feeding cylinder assembly, an air inlet/outlet assembly, a feeding tube moving assembly and a feeding tube assembly. The air inlet/outlet assembly comprises a furnace chamber air inlet/outlet (12) communicated with an ingot furnace chamber, a feeding cylinder air outlet (14) communicated with a feeding cylinder and an air inlet pipe (13) for connecting the furnace chamber air inlet/out (12) and the feeding cylinder air inlet/outlet (14). The feeding tube moving assembly comprises an upper bellow (5), a lower bellow (7), a flange for connecting the upper bellow and the lower bellow, a guide rod (8) fixed on an ingot furnace coil base and a guide sleeve (6) fixed on the flange for connecting the upper bellow and the lower bellow. The feeding tube assembly comprises an upper feeing tube (4), a lower feeing tube (9) and a stop valve (3) arranged between the feeding cylinder (2) and the upper feeding tube (4). The secondary feeding device can improve utilization rate of polycrystalline silicon cast ingot quartz crucibles, improves production capacity of a single ingot furnace, guarantees service life of the feeding tube and reduces cost of cast ingots.
Description
Technical field
The utility model relates to a kind of polycrystalline silicon ingot casting and uses the secondary charging device.Belong to the polycrystalline silicon ingot casting field in the photovoltaic industry production process.
Background technology
The mode of polycrystalline silicon ingot casting employing at present is the silicon material of in quartz crucible, packing into, high temperature melting in ingot furnace, the cooling from the bottom then, directional freeze formation ingot casting.The silicon material of crucible is a bulk si material not of uniform size owing to pack into, and certain gap is arranged between the material, and the silicon material melts crucible top, back and has certain surplus.In crucible, add a certain amount of silicon material once more if melt the back, can improve the utilization ratio of ingot casting quartz crucible, improve the production capacity of separate unit ingot furnace, reduce the ingot production cost at the silicon material.
Chinese patent (CN201624086) provides a kind of secondary charging device that is used for polycrystalline furnace, and this device can add a certain amount of silicon material once more after the silicon material melts, reach the purpose of secondary charging.But the used filling tube of this device will remain on original position all the time, and is half the half the outside thermal field in thermal field; The easy corrosion of rupturing and in thermal field, receiving silicon steam of the uneven filling tube that is heated; Work-ing life is very short, and uses the filling tube of corrosion-and high-temp-resistant material, and price is very expensive again.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency; A kind of utilization ratio that can improve the polycrystalline silicon ingot casting quartz crucible is provided; Improve the production capacity of separate unit ingot furnace, can prolong the work-ing life of filling tube again, reduce the polycrystalline silicon ingot casting of ingot casting cost and use the secondary charging device.
The purpose of the utility model is achieved in that a kind of polycrystalline silicon ingot casting uses the secondary charging device, comprises that barrel assembly, turnover gas assembly, filling tube move assembly and filling tube assembly;
Said barrel assembly comprises: barrel and lid barrel loam cake above that;
Said turnover gas assembly comprises: the furnace chamber air inlet/outlet that communicates with the ingot furnace furnace chamber, the barrel air inlet/outlet that communicates with barrel and be connected the furnace chamber air inlet/outlet and the inlet pipe of barrel air inlet/outlet;
Said filling tube moves assembly and comprises: go up corrugated tube, down corrugated tube, connect corrugated tube up and down flange, be fixed on the ingot furnace table guide rod be fixed on is connected about guide pin bushing on the flange of corrugated tube;
Said filling tube assembly comprises: be divided into the last filling tube and the following filling tube of two joints up and down and be arranged on barrel and last filling tube between stopping valve;
Said barrel is positioned at the topmost of whole device;
The last corrugated tube upper end that said filling tube moves assembly is fixedly connected with stopping valve through upper flange, and the lower end of following corrugated tube is connected with flange on the ingot furnace bell;
The last filling tube of said filling tube assembly lays respectively in corrugated tube and the following corrugated tube with following filling tube, and the upper end of last filling tube is fixed on the upper flange of corrugated tube, and the upper end of following filling tube is fixed on down on the upper flange of corrugated tube.In the filling tube, muff on the ingot furnace thermal field was passed in following filling tube lower end under inserted last filling tube lower end.
The beneficial effect of the utility model is:
1, uses the utility model to realize the repeatedly reinforced of ingot casting process, after the silicon material melts fully in crucible, in crucible, add a certain amount of silicon material once more, fill up vacant space, crucible top, improved the utilization ratio of crucible, improved the production capacity of separate unit table.
2, the silicon ingot height increases, and silicon ingot is reduced by the influence of impurity back diffusion and crucible bottom diffusion of contaminants relatively, thereby the good article rate of silicon ingot also can be improved.
3, filling tube can stretch into thermal field when reinforced, and the non-reinforced time remains on the thermal field outside, and the time of filling tube in thermal field shortens greatly, and be greatly improved the work-ing life of filling tube.
Description of drawings
Fig. 1 is that the utility model polycrystalline silicon ingot casting is with the non-reinforced status architecture synoptic diagram of secondary charging device.
Fig. 2 is that the utility model polycrystalline silicon ingot casting is with the reinforced status architecture synoptic diagram of secondary charging device.
Reference numeral among the figure:
Barrel loam cake 1, barrel 2, stopping valve 3, go up filling tube 4, go up corrugated tube 5, guide pin bushing 6, corrugated tube 7, guide rod 8, filling tube 9, muff 10, ingot furnace bell 11, furnace chamber air inlet/outlet 12, inlet pipe 13, barrel air inlet/outlet 14 down down.
Embodiment
Referring to Fig. 1 ~ 2, Fig. 1 is that the utility model polycrystalline silicon ingot casting is with the non-reinforced status architecture synoptic diagram of secondary charging device.Fig. 2 is that the utility model polycrystalline silicon ingot casting is with the reinforced status architecture synoptic diagram of secondary charging device.Can find out that by Fig. 1 and Fig. 2 the utility model polycrystalline silicon ingot casting is used the secondary charging device, by barrel assembly, turnover gas assembly, filling tube moves assembly and the filling tube assembly is formed.
Said barrel assembly comprises: the barrel 2 of charge and lid barrel loam cake 1 above that.
Said turnover gas assembly comprises: the furnace chamber air inlet/outlet 12 that communicates with the ingot furnace furnace chamber, the barrel air inlet/outlet 14 that communicates with barrel and inlet pipe 13.
Said filling tube moves assembly and comprises: go up corrugated tube 5, down corrugated tube 7, connect corrugated tube up and down flange, be fixed on the ingot furnace table guide rod 8 be fixed on the flange that is connected upper and lower corrugated tube on guide pin bushing 6.
Said filling tube assembly comprises: be divided into two joints up and down last filling tube 4 and following filling tube 9, be arranged on the stopping valve 3 between barrel 2 and the last filling tube 4.
Said barrel 2 is positioned at the topmost of whole device.Barrel 2 is a stainless steel, and inwall evenly is coated with Teflon and handles.The barrel air inlet/outlet 14 that communicates with barrel is located on the barrel loam cake 1.
Be communicated with inlet pipe 13 between the furnace chamber air inlet/outlet 12 of said turnover gas assembly and the barrel air inlet/outlet 14, keep equating with the furnace chamber internal gas pressure in the barrel.
Last corrugated tube 5 upper ends that said filling tube moves assembly are fixedly connected with stopping valve 3 through upper flange, and the lower end of following corrugated tube 7 is connected with flange on the ingot furnace bell 11.Fixing horizontal base on the ingot furnace table, guide rod 8 are fixed on the pedestal and perpendicular to pedestal.Guide pin bushing is fixed on up and down on the corrugated tube flange connecting.To the ingot furnace thermal field between the muff bottom surface, upper limit is higher than muff end face on the ingot furnace thermal field to following filling tube lower end lower limit at silicon liquid level.When following filling tube was positioned at lower limit, the low side of last filling tube was still in following filling tube.
The last filling tube 4 and the following filling tube 9 of said filling tube assembly lay respectively in corrugated tube 5 and the following corrugated tube 7, and the upper end of last filling tube 4 is fixed on the upper flange of corrugated tube 5, and the upper end of following filling tube 9 is fixed on down on the upper flange of corrugated tube 7.Muff 10 on the ingot furnace thermal field is passed in following filling tube 9 lower ends.Reinforced filling tube at present puts in the thermal field, and is as shown in Figure 2, after reinforced the completion, will descend filling tube to propose thermal field, as shown in Figure 1.In order to prevent that the silicon material from leaking and to make things convenient for down that filling tube moves up and down, last filling tube 4 external diameters are less than the internal diameter of filling tube 9 down, and the insertion of last filling tube 4 lower ends is down in the filling tube 9.Last filling tube 4 is a stainless steel, and following filling tube 9 is quartz or graphite material.
Below in conjunction with preferred practical implementation instance the utility model is further specified:
Use the utility model to carry out ingot casting, the one feeding amount is 280Kg in the crucible, in barrel, adds silicon material 150Kg.Add the thermalization material according to normal casting ingot process, wait after the silicon material melts fully in the crucible, filling tube is moved, open stopping valve, feed in raw material, continue reinforcedly after 10 minutes, close stopping valve.The silicon material feeds in raw material according to above-mentioned steps after melting fully once more, so repeats, and the silicon material in barrel adds fully.After the silicon material melts fully, get into long brilliant program, accomplish long brilliant process.After going out ingot, silicon ingot is intact, the silicon ingot and the indistinction of silicon ingot check quality and normal ingot casting.
Detected result is following:
The same table secondary charging of table 1. silicon ingot detects data with normal silicon ingot
| Silicon ingot | Silicon ingot weight (kg) | Type (P/N) | Top resistivity (Ω cm) | End resistivity (Ω cm) | Average minority carrier lifetime (μ s) |
| Normal silicon ingot | 282.3 | P | 1.5 | 2.2 | 4.13 |
| Normal silicon ingot | 282.3 | P | 1.2 | 2.0 | 4.45 |
| Normal silicon ingot | 282.1 | P | 1.4 | 2.1 | 3.84 |
| The secondary charging ingot | 431.5 | P | 1.3 | 2.1 | 4.68 |
| The secondary charging ingot | 432.1 | P | 1.4 | 2.3 | 4.43 |
| The secondary charging ingot | 431.8 | P | 1.3 | 2.1 | 3.96 |
Table 2. separate unit polycrystalline furnace cost and benefit is adjusted like following table:
See from comparing result, use the ingot furnace of this invention, every month production capacity of separate unit improves more than 20% crucible cost savings 20%.
Claims (3)
1. a polycrystalline silicon ingot casting is used the secondary charging device, it is characterized in that: said device comprises that barrel assembly, turnover gas assembly, filling tube move assembly and filling tube assembly;
Said barrel assembly comprises: barrel (2) and lid barrel loam cake (1) above that;
Said turnover gas assembly comprises: the furnace chamber air inlet/outlet (12) that communicates with the ingot furnace furnace chamber, the barrel air inlet/outlet (14) that communicates with barrel and be connected furnace chamber air inlet/outlet (12) and the inlet pipe (13) of barrel air inlet/outlet (14);
Said filling tube moves assembly and comprises: go up corrugated tube (5), down corrugated tube (7), connect corrugated tube up and down flange, be fixed on the ingot furnace table guide rod (8) be fixed on be connected about guide pin bushing (6) on the flange of corrugated tube;
Said filling tube assembly comprises: be divided into the last filling tube (4) and the following filling tube (9) of two joints up and down and be arranged on barrel (2) and last filling tube (4) between stopping valve (3);
Said barrel (2) is positioned at the topmost of whole device;
Last corrugated tube (5) upper end that said filling tube moves assembly is fixedly connected with stopping valve (3) through upper flange, and the lower end of following corrugated tube (7) is connected with flange on the ingot furnace bell (11);
The last filling tube (4) of said filling tube assembly and following filling tube (9) lay respectively in corrugated tube (5) and the following corrugated tube (7); The upper end of last filling tube (4) is fixed on the upper flange of corrugated tube (5); The upper end of following filling tube (9) is fixed on down on the upper flange of corrugated tube (7); Muff on the ingot furnace thermal field (10) is passed in following filling tube (9) lower end, and insert in the following filling tube (9) last filling tube (4) lower end.
2. a kind of polycrystalline silicon ingot casting according to claim 1 is used the secondary charging device, it is characterized in that: said upward filling tube (4) is a stainless steel, and following filling tube (9) is quartz or graphite material.
3. a kind of polycrystalline silicon ingot casting according to claim 1 is used the secondary charging device; It is characterized in that: said barrel (2) is a stainless steel; Barrel (2) inwall applies Teflon, and the barrel air inlet/outlet (14) that communicates with barrel is located on the barrel loam cake (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203597336U CN202482489U (en) | 2011-09-23 | 2011-09-23 | Secondary feeding device for polycrystalline silicon cast ingots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203597336U CN202482489U (en) | 2011-09-23 | 2011-09-23 | Secondary feeding device for polycrystalline silicon cast ingots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202482489U true CN202482489U (en) | 2012-10-10 |
Family
ID=46956926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203597336U Withdrawn - After Issue CN202482489U (en) | 2011-09-23 | 2011-09-23 | Secondary feeding device for polycrystalline silicon cast ingots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202482489U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312282A (en) * | 2011-09-23 | 2012-01-11 | 海润光伏科技股份有限公司 | Two-stage feeding device for polysilicon ingot casting |
| CN105951180A (en) * | 2016-06-01 | 2016-09-21 | 江苏协鑫硅材料科技发展有限公司 | Secondary feeding device for polysilicon ingot furnace and polycrystalline ingot casting system |
| CN113564703A (en) * | 2021-07-20 | 2021-10-29 | 江苏拓正茂源新能源有限公司 | Polycrystalline silicon ingot furnace convenient for feeding |
-
2011
- 2011-09-23 CN CN2011203597336U patent/CN202482489U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312282A (en) * | 2011-09-23 | 2012-01-11 | 海润光伏科技股份有限公司 | Two-stage feeding device for polysilicon ingot casting |
| CN102312282B (en) * | 2011-09-23 | 2014-02-26 | 海润光伏科技股份有限公司 | Two-stage feeding device for polysilicon ingot casting |
| CN105951180A (en) * | 2016-06-01 | 2016-09-21 | 江苏协鑫硅材料科技发展有限公司 | Secondary feeding device for polysilicon ingot furnace and polycrystalline ingot casting system |
| CN105951180B (en) * | 2016-06-01 | 2019-03-15 | 江苏协鑫硅材料科技发展有限公司 | Polycrystalline silicon ingot or purifying furnace secondary charging device and polycrystalline cast ingot system |
| CN113564703A (en) * | 2021-07-20 | 2021-10-29 | 江苏拓正茂源新能源有限公司 | Polycrystalline silicon ingot furnace convenient for feeding |
| CN113564703B (en) * | 2021-07-20 | 2023-08-29 | 江苏拓正茂源新能源有限公司 | Polycrystalline silicon ingot furnace convenient for feeding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140226 |
|
| RGAV | Abandon patent right to avoid regrant |