CN204434769U - Improve the insulation construction of ingot casting qualification rate - Google Patents
Improve the insulation construction of ingot casting qualification rate Download PDFInfo
- Publication number
- CN204434769U CN204434769U CN201420844487.7U CN201420844487U CN204434769U CN 204434769 U CN204434769 U CN 204434769U CN 201420844487 U CN201420844487 U CN 201420844487U CN 204434769 U CN204434769 U CN 204434769U
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- China
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- heat exchange
- exchange platform
- insulation layer
- thermal insulation
- ingot casting
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Abstract
A kind of insulation construction improving ingot casting qualification rate, comprise graphite side, graphite base plate, heat exchange platform and thermal insulation layer, graphite side is arranged on the surrounding of crucible, graphite base plate is arranged on the bottom face of crucible, heat exchange platform is arranged on the bottom face of graphite base plate, the surrounding of heat exchange platform is provided with thermal insulation layer, the contact surface of thermal insulation layer and heat exchange platform has some vertical orientation radiating grooves.Owing to being provided with thermal insulation layer in the surrounding of heat exchange platform, crystal that thermal field design defect causes can be improved to tilt problem, greatly slow down the vertical surface of heat exchange platform to surrounding radiating and cooling, make crystal orientation during crystal growth be tending towards vertical and reach the effect of even oriented heat dissipating impurities removal, improve the serious epirelief phenomenon of the excessive solid-liquid interface caused of temperature thermoisopleth fluctuation in vertical direction simultaneously, and then reach the object shortening the ingot casting cycle, improve ingot furnace production capacity, an average stove can save 10 hours, give production cost-saving, reduce energy consumption.
Description
Technical field:
The utility model relates to sun power silicon ingot production unit, particularly relates to the thermal field insulation construction improving polycrystalline ingot furnace ingot casting qualification rate.
Background technology:
Sun power is green regenerative energy sources, and in effective utilization of sun power, solar photovoltaic utilization is the research field that development in recent years is fast, the most most active.Along with solar cell in recent years develop rapidly with constantly apply, market is increasing for the demand of solar cell.Crystal silicon solar energy battery is more and more applied to energy field, and wherein, silicon materials are main carriers of solar photovoltaic utilization, and the preparation of crystalline silicon is the basis of photovoltaic cell.
In photovoltaic field, utilizing the method for directional freeze to produce polycrystal silicon ingot is the method generally adopted.Its ultimate principle is, is placed on by polycrystalline silicon raw material in quartz ceramic crucible, and quartz ceramic crucible is placed on by " plumbago crucible " that backplate at the bottom of graphite and side guard plate are formed, is placed in thermal field system, and heating makes silicon material melt completely.Then, open bottom thermal field, heat discharges from crucible bottom, and temperature reduces, and the bottom of crucible will be cooled to the ctystallizing point temperature of silicon materials gradually.Then silicon solution starts crystallization in crucible bottom, upwards grows gradually, and shape is columnar crystal structure from bottom to top.The growth pattern of polycrystal silicon ingot grows straight up, this just requires that the thermal field structure in polycrystalline furnace must provide the thermograde straight up needed for crystal growth and Transverse Temperature Gradient to go to zero, and to realize in thermal field the important thermal field component heat exchange platform of thermograde straight up, but the heat exchange platform of polycrystalline ingot furnace is cube structure, after seeding generates, the defect of silicon crystal is more, the centre of the solid-liquid interface of long brilliant process is generally more protruding, the both sides gradient is larger, research shows that the solid-liquid face of long brilliant process is more smooth, more favourable to the discharge of long brilliant Process Impurity, larger impact is had on the total quality of crystal, and the corner parts of silicon ingot to compare centre portions long brilliant consuming time longer, need time expand just can complete the long crystalline substance in corner, thus cause ingot casting cycle stretch-out 4-6 hour, the production capacity of ingot furnace is had a certain impact.
Utility model content:
The utility model provides a kind of insulation construction improving ingot casting qualification rate, and it can make long brilliant process solid-liquid face keep relative level, improves the production time, improves the quality of products.
The technical scheme that the utility model adopts is:
A kind of insulation construction improving ingot casting qualification rate, comprise graphite side, graphite base plate and heat exchange platform, graphite side is arranged on the surrounding of crucible, graphite base plate is arranged on the bottom face of crucible, heat exchange platform is arranged on the bottom face of graphite base plate, it is characterized in that: the surrounding of heat exchange platform is provided with thermal insulation layer, the contact surface of thermal insulation layer and heat exchange platform has some vertical orientation radiating grooves.
Further, some vertical orientation radiating grooves are had in the first-class spacing of contact surface of thermal insulation layer and heat exchange platform.
Further, the cross-sectional shape of described vertical orientation radiating groove is rectangle, semicircle or trilateral.
Further, heat pipe is installed the below of the vertical orientation radiating groove of thermal insulation layer is dismountable.
Further, described thermal insulation layer is graphite thermal insulation layer.
Further, the base of thermal insulation layer is parallel with the base of heat exchange platform, and the thickness of thermal insulation layer is 40mm.
Owing to being provided with thermal insulation layer in the surrounding of heat exchange platform, crystal that thermal field design defect causes can be improved to tilting and the epirelief problem of solid-liquid interface, the graphite thermal insulation layer of heat exchange platform surrounding greatly can slow down the vertical surface of heat exchange platform to surrounding radiating and cooling, thus crystal orientation when making crystal growth is tending towards vertical and reaches the effect of even oriented heat dissipating impurities removal, improve the serious epirelief phenomenon due to the excessive solid-liquid interface caused of temperature thermoisopleth fluctuation in vertical direction simultaneously, and then reach the shortening ingot casting cycle, improve the object of ingot furnace production capacity, an average stove can save 10 hours, give production cost-saving, reduce energy consumption.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of thermal insulation layer;
Fig. 3 is the rear view of thermal insulation layer contact surface in Fig. 2;
In figure: 1-graphite side; 2-graphite base plate; 3-heat exchange platform; 4-thermal insulation layer; 41-contact surface; 42-vertical orientation radiating groove; 43-heat pipe.
Embodiment:
Specific embodiments of the present utility model is described in detail below in conjunction with accompanying drawing:
A kind of insulation construction improving ingot casting qualification rate, as shown in FIG. 1 to 3, comprise graphite side 1, graphite base plate 2, heat exchange platform 3 and thermal insulation layer 4, graphite side 1 is arranged on the surrounding of crucible, graphite base plate 2 is arranged on the bottom face of crucible, heat exchange platform 3 is arranged on the bottom face of graphite base plate 2, the surrounding of heat exchange platform 3 is provided with the graphite thermal insulation layer 4 that thickness is 40mm, having cross-sectional shape at thermal insulation layer 4 with the first-class spacing of contact surface 41 of heat exchange platform 3 is semicircular vertical orientation radiating groove 42, heat pipe 43 is installed the below of the vertical orientation radiating groove 42 of thermal insulation layer 4 is dismountable, the base of thermal insulation layer 4 is parallel with the base of heat exchange platform 3.
Claims (5)
1. one kind is improved the insulation construction of ingot casting qualification rate, comprise graphite side (1), graphite base plate (2) and heat exchange platform (3), graphite side (1) is arranged on the surrounding of crucible, graphite base plate (2) is arranged on the bottom face of crucible, heat exchange platform (3) is arranged on the bottom face of graphite base plate (2), it is characterized in that: the surrounding of heat exchange platform (3) is provided with thermal insulation layer (4), the contact surface (41) of thermal insulation layer (4) with heat exchange platform (3) has some vertical orientation radiating grooves (42).
2. improve the insulation construction of ingot casting qualification rate according to claim 1, it is characterized in that: have some vertical orientation radiating grooves (42) at thermal insulation layer (4) and the first-class spacing of contact surface of heat exchange platform (3).
3. according to claim 1 or 2, improve the insulation construction of ingot casting qualification rate, it is characterized in that: the cross-sectional shape of described vertical orientation radiating groove (42) is rectangle, semicircle or trilateral.
4. improve the insulation construction of ingot casting qualification rate according to claim 1, it is characterized in that: heat pipe (43) is installed the below of the vertical orientation radiating groove (42) of thermal insulation layer (4) is dismountable.
5. improve the insulation construction of ingot casting qualification rate according to claim 1, it is characterized in that: the base of thermal insulation layer (4) is parallel with the base of heat exchange platform (3), the thickness of thermal insulation layer (4) is 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420844487.7U CN204434769U (en) | 2014-12-25 | 2014-12-25 | Improve the insulation construction of ingot casting qualification rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420844487.7U CN204434769U (en) | 2014-12-25 | 2014-12-25 | Improve the insulation construction of ingot casting qualification rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204434769U true CN204434769U (en) | 2015-07-01 |
Family
ID=53602663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420844487.7U Expired - Fee Related CN204434769U (en) | 2014-12-25 | 2014-12-25 | Improve the insulation construction of ingot casting qualification rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204434769U (en) |
-
2014
- 2014-12-25 CN CN201420844487.7U patent/CN204434769U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20171225 |