Insulation sleeve for reduction furnace
By designing a removable insulation sleeve and using aerogel and polytetrafluoroethylene cloth for heat insulation, the increase in power consumption and cost increase caused by high temperature of the reduction furnace in polysilicon production is solved, and the effect of reducing heat loss and power consumption is achieved.
Patent Information
- Application Number
- CN202422176705.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The high temperature of the reduction furnace in polysilicon production leads to an increase in production power consumption and an increase in overall cost.
A removable insulation cover is designed, including multiple rectangular insulation sheets and accessories, fixed to the outer wall of the reduction furnace by Velcro and rivets, and insulated with aerogel and PTFE cloth.
It effectively reduces the heat loss of the reduction furnace, increases the reaction temperature in the furnace, indirectly reduces the power consumption of polysilicon production, and achieves cost reduction and efficiency improvement.
Smart Images
Figure CN223020873U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polysilicon production, and more specifically, to a heat preservation sleeve for a reduction furnace. Background Art
[0002] In the production of polysilicon, after the chassis and the furnace barrel of the reduction furnace are heat-exchanged by water, the surface temperatures reach above 85°C and above 100°C respectively. These high-temperature components generate a large amount of heat radiation in the production hall, directly leading to a significant increase in the temperature of the hall. To ensure the working environment of workers, external air-conditioning units are usually used for cooling, but this measure additionally increases the heat loss during the polysilicon production process, further raising the production power consumption and increasing the overall cost. Summary of the Invention
[0003] The technical problem to be solved by the utility model is the problem that the high temperature of the reduction furnace in polysilicon production increases the production power consumption and the overall cost.
[0004] To solve the above technical problem, according to the utility model, a heat preservation sleeve for a reduction furnace is provided, which includes a heat preservation cylindrical sleeve and accessories. The heat preservation cylindrical sleeve is detachably wrapped around the outer wall of the reduction furnace to insulate the outer wall of the reduction furnace; the accessories protrude from the outer surface of the heat preservation cylindrical sleeve and are used to wrap the protruding parts of the outer wall of the reduction furnace.
[0005] Preferably, the heat preservation cylindrical sleeve includes a plurality of rectangular heat preservation sheets, and the plurality of heat preservation sheets are detachably connected to form a heat preservation cylindrical sleeve.
[0006] Preferably, the adjacent heat preservation sheets are fixedly connected by magic tape.
[0007] Preferably, a plurality of rivets are further provided on the surface of the heat preservation sheet to facilitate fixing the heat preservation sleeve on the outer wall of the reduction furnace.
[0008] Preferably, the heat preservation sheet includes an outer lining cloth and aerogel, and the aerogel is sandwiched inside the outer lining cloth to reduce the heat loss of the reduction furnace.
[0009] Preferably, the outer lining cloth is made of polytetrafluoroethylene.
[0010] Preferably, the accessories are also detachably fixed to the outer surface of the heat preservation cylindrical sleeve by magic tape.
[0011] Preferably, the accessories are integrated with the cylindrical sleeve.
[0012] Preferably, the number of the accessories includes a plurality.
[0013] Preferably, the accessories include a sight glass accessory for wrapping the sight glass on the reduction furnace.
[0014] Compared with the prior art, the technical solutions provided by the embodiments of the present utility model can at least achieve the following beneficial effects:
[0015] First, the addition of the heat preservation sleeve not only effectively reduces the heat loss of the reduction furnace during production, but also indirectly reduces the power consumption of polysilicon production by increasing the reaction temperature inside the furnace, achieving the established goal of cost reduction and efficiency improvement.
[0016] Second, the heat preservation sleeve includes a plurality of detachable heat preservation sheets, which are convenient for installation and later maintenance and replacement.
[0017] Third, the number of the heat preservation sheets can be selected according to the diameter of the reduction furnace, with a wide adaptation range.
[0018] Fourth, the outer lining cloth of the heat preservation sheet is made of polytetrafluoroethylene, which has a small friction coefficient, is easy to clean, and is resistant to acids and alkalis.
[0019] Fifth, the aerogel is sandwiched inside the outer lining cloth. As a nano-porous solid material, the aerogel has strong plasticity. Its excellent heat insulation performance ensures the reduction of heat loss of the reduction furnace chassis; the aerogel also has the characteristics of corrosion resistance and non-combustibility, and can adapt to the long-term use of the reduction furnace.
[0020] Sixth, a plurality of rivets are further provided on the surface of the heat preservation sheet. After disassembly and reinstallation, the heat preservation sleeve can still wrap the outer wall of the reduction furnace.
[0021] This guarantee is crucial for the production of polysilicon because there is a direct proportional relationship between the reaction temperature inside the reduction furnace and the production power consumption.
[0022] In response to this problem, we conducted in-depth technical discussions and power consumption analysis, and finally decided to add a heat preservation sleeve to the chassis and the sight glass part of the furnace barrel of the reduction furnace. When the reduction furnace is in operation, we will properly cover this set of heat preservation devices on the upper side section from the chassis to the sight glass, so as to effectively isolate and reduce the heat dissipated from the reduction furnace chassis. Through this measure, we successfully increased the reaction temperature inside the reduction furnace, and this is crucial for the production of polysilicon because there is a direct proportional relationship between the reaction temperature inside the reduction furnace and the production power consumption.
[0023] In summary, the addition of the heat preservation sleeve not only effectively reduces the heat loss of the reduction furnace during production, but also indirectly reduces the power consumption of polysilicon production by increasing the reaction temperature inside the furnace, achieving the established goal of cost reduction and efficiency improvement. Description of the Drawings
[0024] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present utility model and do not limit the present utility model.
[0025] Figure 1 It is a schematic perspective view of a heat preservation sleeve for a polysilicon reduction furnace provided in this embodiment. Specific embodiments
[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0027] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The "first", "second", and similar terms used in the description and claims of the patent application of the present utility model do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one.
[0028] Embodiment 1
[0029] Refer to Figure 1 , this embodiment provides a heat preservation sleeve for a reduction furnace. The heat preservation sleeve includes four rectangular heat preservation sheets 1. The four heat preservation sheets 1 are detachably connected to form a heat preservation cylindrical sleeve for wrapping around the outer wall of the reduction furnace to insulate the outer wall of the reduction furnace. Preferably, the heat preservation sleeve is sleeved on the bottom of the reduction furnace because the temperature of the reduction furnace chassis is high. Adjacent heat preservation sheets 1 are fixedly connected by Velcro 2. The number of the heat preservation sheets 1 can be selected according to the diameter of the reduction furnace.
[0030] The heat-insulating sheet 1 includes an outer lining cloth and aerogel. The aerogel is sandwiched inside the outer lining cloth and is used to reduce the heat loss of the reduction furnace. As a nano-porous solid material, the aerogel has strong plasticity, and its excellent heat-insulating performance ensures the reduction of heat loss at the chassis of the reduction furnace. The aerogel also has the characteristics of corrosion resistance and non-combustibility, and can adapt to the long-term use of the reduction furnace. The outer lining cloth is preferably made of polytetrafluoroethylene, which has a small friction coefficient, is easy to clean, and is resistant to acids and alkalis. The surface of the heat-insulating sheet 1 is also provided with a plurality of rivets, which are convenient for fixing the heat-insulating sleeve on the outer wall of the reduction furnace, and the plurality of rivets are evenly distributed.
[0031] The heat-insulating sleeve further includes accessories, and the accessories are also detachably protruded on the outer surface of the heat-insulating cylindrical sleeve through Velcro and are used to wrap the parts protruding from the outer wall of the reduction furnace. The number of the accessories includes a plurality, such as a sight glass accessory 3 and an exhaust positioning whistle accessory 4, etc. The sight glass accessory 3 is used to wrap the sight glass on the reduction furnace. Preferably, the material of the accessories is the same as that of the heat-insulating sheet 1.
[0032] When the heat-insulating sleeve is in use, stick the Velcro 2 at the corresponding connection parts of the plurality of heat-insulating sheets 1, stick the Velcro of the accessories, and fix the rivets to the outer wall of the reduction furnace to complete the installation. When the heat-insulating sleeve is not in use, simply detach the heat-insulating sheets 1 in sequence, which is easy to operate.
[0033] In practice, a heat-insulating sleeve is added to the chassis of the reduction furnace and the sight glass part of the furnace barrel. When the reduction furnace is in operation, wrap the heat-insulating sleeve around the upper side section from the chassis to the sight glass, so as to effectively isolate and reduce the heat dissipated from the chassis of the reduction furnace. Through this measure, the reaction temperature inside the reduction furnace is successfully increased. The production power consumption is proportional to the temperature of the reduction furnace. When the same reaction temperature of the reduction furnace is required, the heat loss of the reduction furnace is reduced and the power consumption is reduced.
[0034] It can be seen that compared with the prior art, the addition of the heat-insulating sleeve not only effectively reduces the heat loss of the reduction furnace during production, but also indirectly reduces the power consumption of polysilicon production by increasing the reaction temperature inside the furnace, achieving the established goal of cost reduction and efficiency improvement.
[0035] Embodiment 2
[0036] This embodiment provides a heat-insulating sleeve for a reduction furnace. The same as Embodiment 1, the only difference is that the accessories are fixed on the outer surface of the heat-insulating cylindrical sleeve, or the accessories are integrated with the heat-insulating cylindrical sleeve. When the heat-insulating sleeve is in use, just stick the Velcro 2 at the corresponding connection parts of the heat-insulating sheets 1 and fix the rivets to the outer wall of the reduction furnace to complete the installation. When the heat-insulating sleeve is not in use, simply detach the heat-insulating sheets 1 in sequence, which is easy to operate.
[0037] The above description is only an exemplary embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. The protection scope of the present utility model is determined by the appended claims.
Claims
1. A heat preservation jacket for a reduction furnace, characterized in that: It comprises a heat-insulating cylindrical sleeve and accessories. The heat-insulating cylindrical sleeve can be detachably wrapped around the outer wall of the reduction furnace to insulate the outer wall of the reduction furnace. The accessories are protruding from the outer surface of the heat-insulating cylindrical sleeve and are used to wrap the protruding parts of the outer wall of the reduction furnace.
2. The thermal insulation cover according to claim 1, characterized in that: The heat-insulating cylindrical sleeve comprises a plurality of rectangular heat-insulating sheets, and the plurality of heat-insulating sheets are detachably connected to form a heat-insulating cylindrical sleeve.
3. The thermal insulation cover according to claim 2, characterized in that: The adjacent thermal insulation sheets are fixedly connected by Velcro.
4. The thermal insulation cover according to claim 2, characterized in that: The surface of the thermal insulation sheet is also provided with a plurality of rivets to facilitate fixing the thermal insulation sleeve to the outer wall of the reduction furnace.
5. The thermal insulation cover according to claim 2, characterized in that: The heat-insulating sheet comprises an outer lining cloth and an aerogel, wherein the aerogel is sandwiched in the outer lining cloth to reduce heat loss of the reduction furnace.
6. The thermal insulation cover according to claim 5, characterized in that: The outer lining cloth is made of polytetrafluoroethylene.
7. The thermal insulation cover according to claim 1, characterized in that: The accessory is also detachably fixed to the outer surface of the heat-insulating cylindrical sleeve by means of Velcro.
8. The thermal insulation cover according to claim 1, characterized in that: The attachment is integrated with the cylindrical sleeve.
9. The thermal insulation cover according to claim 1, characterized in that: The number of the attachments includes multiple.
10. The thermal insulation cover according to claim 9, characterized in that: The accessories include a sight glass accessory for wrapping the sight glass on the reduction furnace.