CN217922434U - Heat-insulation polycrystalline silicon ingot furnace - Google Patents
Heat-insulation polycrystalline silicon ingot furnace Download PDFInfo
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- CN217922434U CN217922434U CN202222399563.5U CN202222399563U CN217922434U CN 217922434 U CN217922434 U CN 217922434U CN 202222399563 U CN202222399563 U CN 202222399563U CN 217922434 U CN217922434 U CN 217922434U
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Abstract
The utility model relates to a polycrystalline silicon ingot casting technical field, a thermal-insulated type polycrystalline silicon ingot furnace, including furnace body, heater, thermal-insulated cage, crucible and thermal-insulated cage lifting unit, thermal-insulated cage includes thermal-insulated cage top cap, thermal-insulated cage curb plate and thermal-insulated cage bottom plate, thermal-insulated cage curb plate includes interior plate and outer panel, the interior plate includes interior plate, a plurality of well interior plate and lower interior plate, go up interior plate, well interior plate and the equal detachable fixed connection of interior plate down, well interior plate specifically is the strip structure of trapezoidal cross-section, the crisscross and outer panel connection of long base and the short base of the trapezoidal cross-section of well interior plate, the utility model discloses the mounting means of well interior plate has alleviateed the work load that the staff carries out the monoblock and changes the interior plate, has reduced manufacturing cost simultaneously, and the material of interior plate is the polyacrylonitrile base, is good thermal insulation material.
Description
Technical Field
The utility model relates to a polycrystalline silicon ingot casting technical field specifically is a thermal-insulated type polycrystalline silicon ingot furnace.
Background
The solar cell can convert light energy into electric energy, and is a key point of the development of the modern energy-saving society. According to the difference of base materials, the existing solar cells are classified into polycrystalline silicon solar cells, single crystal silicon solar cells and quasi single crystal silicon solar cells. The conversion efficiency of the monocrystalline silicon solar cell is high, but the production cost is also high, the conversion efficiency of the polycrystalline silicon solar cell is 1% -2% lower than that of the monocrystalline silicon solar cell, but the production cost is also low, and the quasi-monocrystalline silicon solar cell is a cell between the monocrystalline silicon cell and the polycrystalline silicon solar cell. In comprehensive consideration, solar cells in the market at present are mainly polycrystalline silicon solar cells. The existing polycrystalline silicon ingot for producing the polycrystalline silicon solar cell is generally manufactured by adopting an ingot casting process, the ingot casting process is generally realized by a polycrystalline silicon ingot furnace, and the growth of polycrystalline silicon is mainly completed by the directional growth of a silicon material in the polycrystalline silicon ingot furnace.
At present, each enterprise and factory building commonly used polycrystal ingot furnace comprises a top plate, a bottom plate and double-layer side plates, wherein the side plates are divided into an upper part and a lower part. The polycrystalline ingot furnace is also provided with a crucible and a heater for smelting raw materials. Wherein the heater surrounds the periphery of the upper half of the crucible, and the heater is closer to the inner side plate of the upper half. Because the inside plate of upper portion is close to the heater, can appear serious pulverization phenomenon after being heated for a long time, the powder will drop when the curb plate receives certain external force a little, consequently the corresponding gradual thinning of inside plate thickness will for the thermal-insulated effect of the heat insulating cage in the polycrystal ingot furnace worsens, and then needs bigger heating power in order to maintain the thermal field temperature in the heat insulating cage, and more importantly because thermal field temperature gradient is no longer even, appears the shade when making silicon ingot grow the crystal. Meanwhile, the fallen powder can also enter the molten silicon liquid, so that the carbide of the cast silicon ingot seriously exceeds the standard.
CN 205529141U discloses polycrystal ingot furnace and thermal-insulated cage thereof, thermal-insulated cage includes horizontally roof and bottom plate, still include outer panel and interior plate, the upper surface of bottom plate all rigid coupling has the interior plate all around, the side of roof supports tightly interior plate all around, the equal vertical outer panel that has stacked in the outside of interior plate, interior plate and outer panel detachable fixed connection, the interior plate all includes vertical lower interior plate from bottom to top, well interior plate and last interior plate and the equal detachable fixed connection of lower interior plate. The utility model discloses need not to dismantle each part that is used for fixed interior plate down for the process of interior plate is simplified greatly in the dismantlement, has made things convenient for the operation of changing of tearing open of staff, and save time can not hinder the production progress too much moreover, has guaranteed the thermal-insulated effect of thermal-insulated cage, but the utility model discloses in, when the pulverization appears in certain region of last interior plate, need change whole last interior plate, increased manufacturing cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a thermal-insulated type polycrystalline silicon ingot furnace, the concrete implementation mode is as follows:
a heat insulation type polysilicon ingot furnace comprises a furnace body, a heater, a heat insulation cage, a crucible and a heat insulation cage lifting component, wherein the crucible is positioned in the middle of the furnace body, the heater comprises a top heater and a side heater, a heater cover is arranged above the crucible, the heat insulation cage cover is arranged at the periphery of the heater and the crucible, the top of the furnace body is provided with the heat insulation cage lifting component, the heat insulation cage lifting component is mechanically connected with the heat insulation cage,
further, thermal-insulated cage includes thermal-insulated cage top cap, thermal-insulated cage curb plate and thermal-insulated cage bottom plate, thermal-insulated cage curb plate includes interior plate and outer panel, the interior plate includes interior plate, a plurality of well interior plate and lower interior plate, go up interior plate, well interior plate and the equal detachable fixed connection of interior plate down, well interior plate specifically is trapezoidal cross-section's bar structure, the crisscross and outer panel connection of short base of the trapezoidal cross-section of well interior plate.
Furthermore, the joints of the upper inner side plate and the lower inner side plate with the middle inner side plate are provided with inclined edges matched with the inclined edges of the trapezoidal section, and the joints of the upper inner side plate and the lower inner side plate with the middle inner side plate and the middle inner side plate are tightly combined.
Furthermore, a graphite cooling block positioned at the bottom of the crucible is arranged in the furnace body, the graphite cooling block is supported by a plurality of supporting columns, the supporting columns penetrate through the bottom plate of the lower heat insulation cage, the bottom end of the supporting columns is fixed on the inner wall of the bottom of the furnace body, and a crucible protective plate is arranged on the periphery of the crucible.
Further, the height of the top surface of the lower inner side plate is lower than or equal to the height of the bottom surface of the side heater.
Furthermore, the upper inner side plate, the middle inner side plate and the lower inner side plate are fixedly connected with the outer side plate through graphite screws and graphite nuts.
Further, an overflow blanket is arranged at the bottom of the furnace body.
Further, the inner side plate is a polyacrylonitrile-based graphite felt.
Furthermore, an observation tube is arranged on the central axis of the furnace body from top to bottom.
Furthermore, a high-temperature heat absorption layer is arranged on the inner side wall of the furnace body.
Owing to adopted above technical scheme, the beneficial technological effect of the utility model is that:
1. the utility model discloses in set up thermal-insulated cage, thermal-insulated cage includes thermal-insulated cage top cap, thermal-insulated cage curb plate and thermal-insulated cage bottom plate, and thermal-insulated cage curb plate includes interior plate and outer panel, and the interior plate includes interior plate, a plurality of well interior plate and lower interior plate, and upper interior plate, well interior plate and the equal detachable fixed connection of lower interior plate, well interior plate specifically is the strip structure of trapezoidal cross-section, the crisscross long base and the short base of the trapezoidal cross-section of well interior plate are connected with the outer panel, the utility model discloses the mounting means of well interior plate is convenient for the staff to carry out regionalization replacement when discovering that the interior plate has the loss, has alleviateed the staff and has carried out the work load that the interior plate was changed to the monoblock, can reduce manufacturing cost simultaneously;
2. the utility model discloses well interior curb plate's material is polyacrylonitrile base graphite felt, and polyacrylonitrile base graphite felt still has elasticity, can tailor advantage such as wantonly except that the purity that possesses cubic graphite is high, high temperature resistant, corrosion-resistant, not melting, is a good thermal insulation material, can effectively alleviate the pulverization process of self, has reduced the quantity that the product was fallen into to the powder, has guaranteed the quality of product.
Drawings
FIG. 1 is a first structural schematic diagram of a heat insulation type polysilicon ingot furnace of the present invention;
fig. 2 is a schematic structural diagram of a heat insulation type polysilicon ingot furnace of the present invention.
Description of the reference numerals:
1. a furnace body 2, a heater 3, a heat insulation cage 4, a crucible 5, a heat insulation cage lifting component,
11. a graphite cooling block, 12, a support column, 13, an overflow blanket, 14, an observation tube,
21. a top heater, 22, a side heater,
31. a heat insulation cage top cover 32, heat insulation cage side plates 33 and a heat insulation cage bottom plate,
321. an inner side plate, 322, an outer side plate,
3211. an upper inner side plate 3212, a middle inner side plate 3213, a lower inner side plate,
41. and (4) protecting the crucible.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings:
it should be noted that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy that the present invention can produce and the purpose that the present invention can achieve.
Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The heat insulation type polysilicon ingot furnace of the present invention is explained with reference to fig. 1 to 2:
embodiment 1, a heat insulation type polysilicon ingot furnace, comprising a furnace body 1, a heater 2, a heat insulation cage 3, a crucible 4 and a heat insulation cage lifting assembly 5, wherein the crucible 4 is located in the middle of the furnace body 1, the heater 2 comprises a top heater 21 and a side heater 22, the heater 2 is covered above the crucible 4, the heat insulation cage 3 is covered on the peripheries of the heater 2 and the crucible 4, the top of the furnace body 1 is provided with the heat insulation cage lifting assembly 5, the heat insulation cage lifting assembly 5 is mechanically connected with the heat insulation cage 3,
the heat insulation cage 3 comprises a heat insulation cage top cover 31, heat insulation cage side plates 32 and a heat insulation cage bottom plate 33, each heat insulation cage side plate 32 comprises an inner side plate 321 and an outer side plate 322, each inner side plate 321 comprises an upper inner side plate 3211, a plurality of middle inner side plates 3212 and a lower inner side plate 3213, each upper inner side plate 3211, each middle inner side plate 3212 and each lower inner side plate 3213 are detachably and fixedly connected, each middle inner side plate 3212 is specifically of a strip-shaped structure with a trapezoidal section, and long bottom edges and short bottom edges of the trapezoidal section of each middle inner side plate 3212 are connected with the outer side plates 322 in a staggered manner.
The joints of the upper inner side plate 3211, the lower inner side plate 3213 and the middle inner side plate 3212 are both provided with inclined edges matched with the inclined edges of the trapezoidal sections, and the joints of the upper inner side plate 3211, the lower inner side plate 3213, the middle inner side plate 3212 and the middle inner side plate 3212 are both tightly combined.
By applying the heat insulation type polysilicon ingot furnace provided by the embodiment, related workers enter the furnace body 1 from the bottom of the polysilicon ingot furnace and reach the position of the heat insulation cage bottom plate 33, firstly observe the position of the inner side plate 321 needing to be replaced, if the upper inner side plate 3211 needs to be replaced, the hasp connection of the upper inner side plate 3211 and the middle inner side plate 3212 is released, then the upper inner side plate 3211 is horizontally pulled out, if the middle inner side plate 3212 needs to be replaced, when the short bottom edge of the replaced middle inner side plate 3212 with the trapezoidal section is close to the middle inner side plate 3212 of the outer side plate 322, the middle inner side plate 3212 which needs to be replaced can be directly and horizontally pulled out after the hasp is released, when the long bottom edge of the replaced middle inner side plate 3212 with the trapezoidal section is close to the middle inner side plate 3212 of the outer side plate, the whole middle inner side plate 3212 which needs to be replaced needs to be taken out firstly, thereby reducing the workload of the workers for replacing the inner side plate 321, and reducing the production cost at the same time.
In embodiment 2, the height of the top surface of the lower inner plate 3213 is lower than or equal to the height of the bottom surface of the side heater 22, and the lower inner plate 3213 is difficult to detach, so the lower inner plate 3213 needs to be offset from the side heater 22, and the side heater 22 does not affect the quality of the lower inner plate 3213 too much.
In embodiment 3, the upper inner plate 3211, the middle inner plate 3212, and the lower inner plate 3213 are all fixedly connected to the outer plate 322 by graphite screws and graphite nuts, which are more resistant to high temperature than metal screws and metal nuts, and have better thermal shock resistance, and can maintain their own form without cracks under the condition of continuous temperature change. Meanwhile, the graphite screw and the graphite nut are easier to process than the metal screw and the metal nut, so that the graphite screw and the graphite nut can be replaced in time when damaged.
Embodiment 4, the inner side plate 321 is a polyacrylonitrile-based graphite felt, and the polyacrylonitrile-based graphite felt has the advantages of elasticity, being capable of being cut at will, and the like, besides the characteristics of high purity, high temperature resistance, corrosion resistance, non-melting and the like of the bulk graphite, and is an excellent heat insulating material, which can effectively alleviate the self pulverization process, reduce the amount of powder falling into the product, and is beneficial to improving the product quality.
Example 6, the bottom of the furnace body 1 is provided with an overflow blanket 13, which can monitor the crucible 4 for breakage or overflow leakage.
In embodiment 7, the observation tube 14 is arranged on the central axis of the furnace body 1 from top to bottom, which is convenient for the staff to observe the growth state of the polysilicon from the outside.
In embodiment 8, the inner sidewall of the furnace body 1 is provided with a high-temperature heat absorption layer, and the high-temperature heat absorption layer can increase the absorbed heat and increase the cooling speed.
The working principle and the working process of the embodiment are as follows: firstly, polysilicon raw material is loaded into a crucible 4, then the crucible 4 is placed on a graphite cooling block 11, the central line of the crucible 4 is ensured to be mutually superposed with the central line of a heater 2, then a movable part of a heat insulation cage 3 is lowered to a heat insulation cage bottom plate 33 through a heat insulation cage lifting assembly 5 to form a closed space, a furnace body 1 is closed, and material melting is carried out, at this time, because the heat insulation cage inner side plate 321 is made of polyacrylonitrile-based graphite felt, the heat insulation effect of the polyacrylonitrile-based graphite felt ensures that the temperature in the heat insulation cage is very high, and the material melting time is shortened, so that the power consumption of the heater is reduced, in addition, the height of the top surface of the lower inner side plate 3213 is lower than or equal to the height of the bottom surface of the side heater 22, the loss of the lower inner side plate 3213 can be reduced, and because the upper inner side plate 3211 and the middle inner side plate 3212 are different in loss due to different distances from the heater 2, therefore, in the utility model, the upper inner side plate 3211, the middle plate and the inner plate and the lower plate are detachably fixedly connected, the middle inner plate 3212 is particularly in a strip-shaped structure, the long cross section of the inner side plate 3212 and the short side plate is connected with the short side plate, so that the working cost of workers can be reduced, and the replacement of the working personnel can be conveniently removed, and the replacement cost of the replacement can be reduced. When the temperature needs to be adjusted, the movable part of the heat insulation cage 3 can be lifted through the heat insulation cage lifting assembly 5, the connection gap between the lower part of the movable part of the heat insulation cage 3 and the heat insulation cage bottom plate 33 is large, the heat of the heat insulation cage 33 is dissipated from the gap to form a temperature gradient, namely, the temperature difference is from top to bottom, the upper part is high and the lower part is low, meanwhile, the heat directly radiates to the high-temperature heat absorption coating on the inner wall of the furnace body 1, the high-temperature heat absorption coating can increase the absorbed heat, and the cooling speed is increased.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (9)
1. The utility model provides a thermal-insulated type polycrystalline silicon ingot furnace, includes furnace body (1), heater (2), thermal-insulated cage (3), crucible (4) and thermal-insulated cage lifting unit (5), its characterized in that: the crucible (4) is positioned in the middle of the furnace body (1), the heater (2) comprises a top heater (21) and a side heater (22), the heater (2) is covered above the crucible (4), the heat insulation cage (3) is covered on the peripheries of the heater (2) and the crucible (4), the top of the furnace body (1) is provided with a heat insulation cage lifting component (5), the heat insulation cage lifting component (5) is mechanically connected with the heat insulation cage (3),
the heat insulation cage (3) comprises a heat insulation cage top cover (31), heat insulation cage side plates (32) and a heat insulation cage bottom plate (33), the heat insulation cage side plates (32) comprise an inner side plate (321) and an outer side plate (322), the inner side plate (321) comprises an upper inner side plate (3211), a plurality of middle inner side plates (3212) and a lower inner side plate (3213), the upper inner side plate (3211), the middle inner side plates (3212) and the lower inner side plates (3213) are fixedly connected in a detachable mode, the middle inner side plates (3212) are of strip structures with trapezoidal sections, and the long bottom edge and the short bottom edge of each trapezoidal section of the middle inner side plate (3212) are connected with the outer side plate (322) in a staggered mode.
2. The insulated polysilicon ingot furnace of claim 1, wherein: the joints of the upper inner side plate (3211) and the lower inner side plate (3213) with the middle inner side plate (3212) are both provided with oblique edges matched with the oblique edges of the trapezoidal sections, and the joints of the upper inner side plate (3211) and the lower inner side plate (3213) with the middle inner side plate (3212) and the middle inner side plate (3212) are both tightly combined.
3. The insulated polysilicon ingot furnace of claim 1, wherein: furnace body (1) is inside to be equipped with graphite cooling block (11) that are located crucible (4) bottom, graphite cooling block (11) are supported for a plurality of support columns (12), and support column (12) pass lower part heat-insulating cage (3) bottom plate, and the bottom mounting is on furnace body (1) bottom inner wall, the periphery of crucible (4) is equipped with crucible backplate (41).
4. The heat insulation type polycrystalline silicon ingot furnace according to claim 2, is characterized in that: the height of the top surface of the lower inner side plate (3213) is lower than or equal to the height of the bottom surface of the side heater (22).
5. The insulated polysilicon ingot furnace of claim 2, wherein: the upper inner side plate (3211), the middle inner side plate (3212) and the lower inner side plate (3213) are fixedly connected to the outer side plate (322) by graphite screws and graphite nuts.
6. The insulated polysilicon ingot furnace of claim 1, wherein: the bottom of the furnace body (1) is provided with an overflow blanket (13).
7. The insulated polysilicon ingot furnace of claim 1, wherein: the inner side plate (321) is a polyacrylonitrile-based graphite felt.
8. The insulated polysilicon ingot furnace of claim 1, wherein: an observation tube (14) is arranged on the central axis of the furnace body (1) from top to bottom.
9. The insulated polysilicon ingot furnace of claim 1, wherein: and a high-temperature heat absorption pattern layer is arranged on the inner side wall of the furnace body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222399563.5U CN217922434U (en) | 2022-09-09 | 2022-09-09 | Heat-insulation polycrystalline silicon ingot furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222399563.5U CN217922434U (en) | 2022-09-09 | 2022-09-09 | Heat-insulation polycrystalline silicon ingot furnace |
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| CN217922434U true CN217922434U (en) | 2022-11-29 |
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| CN202222399563.5U Active CN217922434U (en) | 2022-09-09 | 2022-09-09 | Heat-insulation polycrystalline silicon ingot furnace |
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