CN203382847U - Secondary feeding device for polycrystalline silicon ingot furnace - Google Patents
Secondary feeding device for polycrystalline silicon ingot furnace Download PDFInfo
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- CN203382847U CN203382847U CN201320500455.0U CN201320500455U CN203382847U CN 203382847 U CN203382847 U CN 203382847U CN 201320500455 U CN201320500455 U CN 201320500455U CN 203382847 U CN203382847 U CN 203382847U
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Abstract
The utility model discloses a secondary feeding device for a polycrystalline silicon ingot furnace. The secondary feeding device comprises an ingot furnace body, wherein multiple feeding boxes are arranged above the ingot furnace body and are mutually communicated; each feeding box is connected with a feeding pipe; two ends of each feeding pipe are communicated with the inner part of the ingot furnace body and the inner part of the corresponding feeding box; and the feeding pipes are movable in the ingot furnace body. Compared with the conventional polycrystalline silicon ingot technologies, the secondary feeding device for the polycrystalline silicon ingot furnace is capable of increasing single feeding amount obviously due to arrangement of the multiple feeding boxes, thereby improving the utilization rate of a crucible, reducing production cost and improving single ingot productivity; the utilization rate of silicon material is increased effectively and good quality of silicon ingots is guaranteed as the influence of the bottom impurity diffusion on the silicon ingots is reduced due to the height increase of the silicon ingots; feeding time is reduced effectively and the splashing of fusing silicon liquid is avoided during the feeding process as symmetric secondary feeding is adopted; and the feeding process can be observed effectively as a middle view hole is formed in the ingot furnace.
Description
Technical field
The utility model relates to a kind of device, especially relates to a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace, belongs to photovoltaic industry polycrystalline silicon ingot casting technical field.
Background technology
In the photovoltaic field, casting polycrystalline silicon is as a kind of low-cost high-efficiency energy material, always in occupation of the principal market of commodity crystal-silicon solar cell.And casting polycrystalline silicon extensively adopts directional solidification method at present; the quartz crucible of filling polycrystalline silicon material is positioned in the ingot furnace thermal field; heat melted silicon material under protection of inert gas; then by Base Heat board heat radiation, make the silicon material from bottom to top directional long crystal form the polycrystal silicon ingot in certain crystal orientation.But there are a large amount of spaces between the silicon material of the crucible of packing into, after the fusing of silicon material, space is filled, and cause the crucible top to leave certain space, and crucible is as disposable input product, the single crucible feeds intake less, can directly cause that the polycrystal silicon ingot production cost is higher and production efficiency is lower.Current directional solidification method casting polycrystalline silicon ingots that adopt, by the polycrystalline silicon material quartz crucible of packing into, start long brilliantly again from bottom coohng along vertical temperature gradient after heat fused, form the polycrystal silicon ingot in certain crystal orientation.
The feeding device of existing polycrystalline silicon ingot or purifying furnace utilizes the vision slit charging of ingot furnace top center, lacked the monitoring of vision slit to reinforced process, can't make accurate judgement to reinforced number, and the reinforced silicon material of single charging opening single-point is easily piled up, reinforced required time is longer, the more important thing is that this scheme do not make rational explanation to concrete technology, directly to molten silicon material secondary charging, must cause that melt silicon liquid splashes, thereby bring safety problem to casting unit.Have a large amount of gaps in crucible between the silicon material, cause the rear crucible of the silicon material fusing top of filling also to have certain space, this part space easily causes that melt silicon liquid splashes.
The utility model content
The purpose of this utility model is to overcome in existing polycrystalline silicon ingot or purifying furnace and exists single charging opening single-point silicon material that feeds in raw material easily pile up when feed in raw material, reinforced required time is longer, easily cause the problem that melt silicon liquid splashes, designed a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace, this feeding device can be realized the secondary charging in the polycrystalline silicon ingot casting process, on the basis that does not affect the polycrystal silicon ingot quality, can effectively improve the single charging capacity, cast out heavy weight polycrystal silicon ingot, make the quartz crucible of disposable input obtain larger utilization, reduce production costs simultaneously, enhance productivity.
The purpose of this utility model is achieved through the following technical solutions: a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace, comprise the ingot casting body of heater, the top of described ingot casting body of heater is provided with several charging boxs, between charging box, be interconnected, and charging box all is connected with feed-pipe, and the two ends of feed-pipe respectively with the inside of ingot casting body of heater and the internal communication of charging box, feed-pipe can move in the ingot casting body of heater.Can effectively reduce feed time by a plurality of charging boxs that arrange, the phenomenon that not there will be molten silicon liquid to splash in reinforced process, vision slit can effectively be observed reinforced process in the middle of the ingot furnace original tape, the sight line of having avoided existing feed way to occur stop problem.
Further, the quantity of described charging box is two, and is symmetricly set on the top of ingot furnace along the medullary ray of ingot casting body of heater.The concrete quantity of charging box is set according to actual use, but certain more than two, even number is best, as the medullary ray along the ingot casting body of heater, is symmetrical arranged, general two charging boxs in appearance and efficiency just can meet the demand of feeding in raw material.
Further, described feed-pipe comprises upper feeding pipe and lower feed-pipe, the upper feeding pipe be arranged on lower feed-pipe directly over, upper feeding pipe and charging box are communicated with, be provided with the feed-pipe valve between upper feeding pipe and lower feed-pipe, the feed-pipe valve is communicated with upper feeding pipe and lower feed-pipe simultaneously; Be provided with the charging box bottom valve between described charging box and upper feeding pipe, the charging box bottom valve is communicated with charging box and upper feeding pipe simultaneously, and the charging box bottom valve is arranged on feed-pipe valve top.Lower filling tube and upper filling tube are by the lifting device seamless link.
Further, on the outer wall of described upper feeding pipe, be provided with lifting gear, lifting gear is linked on the outer wall of upper feeding pipe, and the bottom of lifting gear is fixed with corresponding feed-pipe valve.Lifting gear is to carry out vertical movement for the position to lower feed-pipe, makes lower feed-pipe can stretch into and break away from the scope of graphite heater.
Further, the below of described charging box is provided with support, and the top of support and the bottom face of charging box are fixed, and the other end is arranged on the top of ingot casting body of heater, feed-pipe through after support with the internal communication of ingot casting body of heater; The top of described feed-pipe valve is provided with adapter sleeve, and lower feed-pipe is communicated with the feed-pipe valve through adapter sleeve, and the bottom of adapter sleeve is connected with the ingot casting body of heater, and the sidewall of adapter sleeve is connected with support.Support is that lifting gear has a relay point when being promoted simultaneously, utilizes adapter sleeve as supporting charging box, making charging box that a point of suppon can be arranged, and support is connected with the ingot casting body of heater.
Further, described lifting gear adopts molybdenum to make; Lower filling tube adopts quartz to make; Upper filling tube adopts stainless steel to make, and inwall applies Teflon coating; Charging box adopts stainless steel to make, and inwall applies Teflon coating.Teflon refers to tetrafluoroethylene, is a kind of synthetic macromolecular material that has used fluorine to replace all hydrogen atoms in polyethylene.This material has the characteristics of antiacid alkali resistant, anti-various organic solvents, is dissolved in hardly all solvents.Simultaneously, tetrafluoroethylene has resistant to elevated temperatures characteristics, and its frictional coefficient is extremely low, so, after can making lubrication, in the utility model, use Teflon coating, makes the silicon material can not attach at wall, reduces wastage of material.
Further, between described charging box, be provided with extraction pipe, extraction pipe is communicated with all charging boxs respectively; Be provided with charging box top cover valve between described extraction pipe and charging box, charging box top cover valve is communicated with extraction pipe and corresponding charging box simultaneously, and charging box top cover valve is arranged on the top of charging box.Extraction pipe is to extract out for the gas by charging box, makes the interior pressure of air pressure ingot furnace in charging box consistent.
In sum, the beneficial effects of the utility model are:
(1) compare with conventional polycrystalline silicon casting ingot process, by a plurality of charging boxs are set, can obviously increase the single charging capacity, improved the crucible utilization ratio, reduce production costs, improve single ingot casting production capacity;
(2) height of silicon ingot increases, and silicon ingot is subject to the impurities at bottom minimizing that extends influence, and has effectively improved the utilization ratio of silicon material, has guaranteed the quality of silicon ingot;
(3) this device symmetrical secondary is reinforced, has effectively reduced feed time, the phenomenon that not there will be molten silicon liquid to splash in reinforced process, and in the middle of the ingot furnace original tape, vision slit can effectively be observed reinforced process.
The accompanying drawing explanation
Fig. 1 is working state schematic representation of the present utility model;
Fig. 2 is the partial schematic diagram of Fig. 1.
Mark and corresponding component title in accompanying drawing: 1-charging box top cover valve; 2-charging box; 3-charging box bottom valve; 4-lifting gear; 5-upper feeding pipe; 6-feed-pipe valve; 7-lower feed-pipe; 8-bleeding point; 9-charging box bottom funnel; 10-vision slit; 11-support; 12-ingot furnace top cover; 13-heat-insulation cage top; 14-ingot casting body of heater; 15-top graphite heater; 16-crucible cover plate; 17-polysilicon small powder; 18-polysilicon melt; 19-sidepiece graphite heater; 20-crucible side guard plate and base plate; 21-heat exchange platform; 22-lifting device.
embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this.
Embodiment:
As shown in Figure 1 and Figure 2, a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace, comprise ingot casting body of heater 14, the top of ingot casting body of heater 14 is provided with several charging boxs 2, between charging box 2, be interconnected, and charging box 2 all is connected with feed-pipe, and the two ends of feed-pipe respectively with the inside of ingot casting body of heater 14 and the internal communication of charging box 2, feed-pipe can be in the interior movement of ingot casting body of heater 14.Utilize a plurality of charging boxs 2 that arrange the crucible in ingot casting body of heater 14 to be fed in raw material simultaneously, improved reinforced efficiency, secondary charging device and ingot furnace are one-piece constructions, with conventional polycrystalline silicon ingot or purifying furnace, compare, can obviously increase the single charging capacity, improve the crucible utilization ratio, reduced production costs, improved single ingot casting production capacity.
Embodiment 2:
As shown in Figure 1 and Figure 2, on the basis of embodiment 1, the quantity of charging box 2 is two, and is symmetricly set on the top of ingot casting body of heater 14 along the medullary ray of ingot casting body of heater 14; Be provided with extraction pipe between described charging box 2, extraction pipe is communicated with all charging boxs 2 respectively; Be provided with charging box top cover valve 1 between extraction pipe and charging box 2, charging box top cover valve 1 is communicated with extraction pipe and corresponding charging box 2 simultaneously, and charging box top cover valve 1 is arranged on the top of charging box 2.Offer bleeding point 8 on extraction pipe, open charging box top cover valve 1, utilize extraction pipe to be bled, after keeping the interior pressure of charging box 2 and the interior pressure of ingot casting body of heater 14 being consistent, close charging box top cover valve 1.
Embodiment 3:
As shown in Figure 1 and Figure 2, on the basis of above-described embodiment, feed-pipe comprises upper feeding pipe 5 and lower feed-pipe 7, upper feeding pipe 5 be arranged on lower feed-pipe 7 directly over, upper feeding pipe 5 and charging box 2 are communicated with, be provided with feed-pipe valve 6 between upper feeding pipe 5 and lower feed-pipe 7, feed-pipe valve 6 is communicated with upper feeding pipe 5 and lower feed-pipe 7 simultaneously; Be provided with charging box bottom valve 3 between charging box 2 and upper feeding pipe 5, charging box bottom valve 3 is communicated with charging box 2 and upper feeding pipe 5 simultaneously, and charging box bottom valve 3 is arranged on feed-pipe valve 6 tops.Charging box 2 is fixed on support 11 for convenience detach, and the inner charging box bottom funnel 9 that forms, be convenient to feed in raw material, and charging box bottom valve 3 be set as stopping valve in funnel bottom, the upper end of upper filling tube 5 closely is connected with charging box 2 by charging box bottom valve 3.
Embodiment 4:
As shown in Figure 1 and Figure 2, on the basis of above-described embodiment, be provided with lifting gear 4 on the outer wall of upper feeding pipe 5, lifting gear 4 is linked on the outer wall of upper feeding pipe 5, and the bottom of lifting gear 4 is fixing with corresponding feed-pipe valve 6; The below of charging box 2 is provided with support 11, and the bottom face of the top of support 11 and charging box 2 is fixed, and the other end is arranged on the top of ingot casting body of heater 14, and feed-pipe passes support 11 afterwards and the internal communication of ingot casting body of heater 14; The top of feed-pipe valve 6 is provided with adapter sleeve, and lower feed-pipe 7 is communicated with feed-pipe valve 6 through adapter sleeve, and the bottom of adapter sleeve is connected with ingot casting body of heater 14, and the sidewall of adapter sleeve is connected with support 11.The bottom of adapter sleeve is to be connected with ingot furnace top cover 12.Lower filling tube 7 adopt lifting gears 4 can free adjustment under the length ingot casting body of heater 14 in of filling tube 5, lower filling tube 7 and upper filling tube 5 pass through lifting gear 4 seamless links.
Principle of work: take off charging box 2, close charging box bottom valve 3, the diameter of packing into is crossed the polysilicon small powder 17 of filtration in the 0.5-2cm scope, again charging box 2 is fixed on support 11 afterwards, cover the top cover of charging box, the outer air extractor that connects of bleeding point 8, charging box 2 bottoms are connected closely with upper filling tube 5, the lifting gear 4 be connected with lower filling tube 7 is positioned at the state risen, and close feed-pipe valve 6, the interior placement of ingot casting body of heater 14 is by the charged quartz crucible of formula, and this is the same with conventional charging method, and the heating phase is identical with normal process.Open charging box top cover valve 1 and bled, keep the interior pressure of charging box and the interior pressure of ingot casting body of heater 14 always, close charging box top cover valve 1.After the interior silicon material of ingot casting body of heater 14 all melts, segment space can be vacated in quartz crucible top, now reduce the heating power of top graphite heater 15, adjust the power of sidepiece graphite heater 19 to keep temperature-resistant, and observe the slow crystallization in silicon melt top in quartz crucible by ingot furnace top view hole 10, adjust lifting gear 4, opening feed-pipe valve 6 fixes lower feed-pipe 7 through top graphite heater 15 and crucible cover plate 16 places, slowly open afterwards charging box bottom valve 3, polysilicon small powder 17 is put under in quartz crucible, can observe whole reinforced state from ingot furnace top cover vision slit 10.After completing secondary charging, close charging box bottom valve 3, lifting gear 4 is promoted, lower feed-pipe 7 is risen to the top graphite heater more than 15, avoid the work-ing life of the lower filling tube 7 of continuous high temperature impact, close feed-pipe valve 6, whole secondary feeds end of processing, recover top heater 15 heating powers afterwards, until melt whole silicon material, form polysilicon melt 18, the long crystalline substance of residue, annealing, process for cooling and conventional casting ingot process are similar.In this process, be provided with heat-insulation cage in ingot casting body of heater 14, crucible is arranged in heat-insulation cage, crucible is fitted with crucible side guard plate and base plate 20, heat-insulation cage top 13 is passed by lower filling tube 7, is provided with heat exchange platform 21 in heat-insulation cage, and heat exchange platform 21 is arranged on the below of crucible bottom plate.Heat-insulation cage top 13 is connected with lifting device 22, and lifting device 22 reaches ingot casting body of heater 14 outsides.
Take aforesaid way, just can realize preferably the utility model.
Claims (10)
1. the secondary charging device for polycrystalline silicon ingot or purifying furnace, it is characterized in that: comprise ingot casting body of heater (14), the top of described ingot casting body of heater (14) is provided with several charging boxs (2), charging box is interconnected between (2), and charging box (2) all is connected with feed-pipe, and the two ends of feed-pipe respectively with the inside of ingot casting body of heater (14) and the internal communication of charging box (2), feed-pipe can move in ingot casting body of heater (14).
2. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 1, it is characterized in that: the quantity of described charging box (2) is two, and is symmetricly set on the top of ingot casting body of heater (14) along the medullary ray of ingot casting body of heater (14).
3. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 2, it is characterized in that: described feed-pipe comprises upper feeding pipe (5) and lower feed-pipe (7), upper feeding pipe (5) be arranged on lower feed-pipe (7) directly over, upper feeding pipe (5) and charging box (2) are communicated with, be provided with feed-pipe valve (6) between upper feeding pipe (5) and lower feed-pipe (7), feed-pipe valve (6) is communicated with upper feeding pipe (5) and lower feed-pipe (7) simultaneously.
4. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 3, it is characterized in that: between described charging box (2) and upper feeding pipe (5), be provided with charging box bottom valve (3), charging box bottom valve (3) is communicated with charging box (2) and upper feeding pipe (5) simultaneously, and charging box bottom valve (3) is arranged on feed-pipe valve (6) top.
5. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 4, it is characterized in that: be provided with lifting gear (4) on the outer wall of described upper feeding pipe (5), lifting gear (4) is linked on the outer wall of upper feeding pipe (5), and the bottom of lifting gear (4) is fixing with corresponding feed-pipe valve (6).
6. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 5, it is characterized in that: the below of described charging box (2) is provided with support (11), the bottom face of the top of support (11) and charging box (2) is fixed, the other end is arranged on the top of ingot casting body of heater (14), and feed-pipe passes support (11) afterwards and the internal communication of ingot casting body of heater (14).
7. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 6, it is characterized in that: the top of described feed-pipe valve (6) is provided with adapter sleeve, lower feed-pipe (7) is communicated with feed-pipe valve (6) through adapter sleeve, and the bottom of adapter sleeve is connected with ingot casting body of heater (14), the sidewall of adapter sleeve is connected with support (11).
8. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 5, is characterized in that: the making of described lifting gear (4) employing molybdenum; Lower filling tube (7) adopts quartz to make; Upper filling tube (5) adopts stainless steel to make, and inwall applies Teflon coating; Charging box (2) adopts stainless steel to make, and inwall applies Teflon coating.
9. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 1, it is characterized in that: described charging box is provided with extraction pipe between (2), and extraction pipe is communicated with all charging boxs (2) respectively.
10. a kind of secondary charging device for polycrystalline silicon ingot or purifying furnace according to claim 9, it is characterized in that: be provided with charging box top cover valve (1) between described extraction pipe and charging box (2), charging box top cover valve (1) is communicated with extraction pipe and corresponding charging box (2) simultaneously, and charging box top cover valve (1) is arranged on the top of charging box (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320500455.0U CN203382847U (en) | 2013-08-16 | 2013-08-16 | Secondary feeding device for polycrystalline silicon ingot furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320500455.0U CN203382847U (en) | 2013-08-16 | 2013-08-16 | Secondary feeding device for polycrystalline silicon ingot furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107815735A (en) * | 2016-09-14 | 2018-03-20 | 上海新昇半导体科技有限公司 | A kind of polysilicon secondary charging device and method |
| CN110886015A (en) * | 2019-11-25 | 2020-03-17 | 大同新成新材料股份有限公司 | Thermal field crucible adjusting type heat preservation equipment for polycrystalline silicon |
-
2013
- 2013-08-16 CN CN201320500455.0U patent/CN203382847U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107815735A (en) * | 2016-09-14 | 2018-03-20 | 上海新昇半导体科技有限公司 | A kind of polysilicon secondary charging device and method |
| CN110886015A (en) * | 2019-11-25 | 2020-03-17 | 大同新成新材料股份有限公司 | Thermal field crucible adjusting type heat preservation equipment for polycrystalline silicon |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20170816 |
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| CF01 | Termination of patent right due to non-payment of annual fee |