CN220926283U - Byproduct steam recovery system of reducing furnace and polysilicon production line - Google Patents
Byproduct steam recovery system of reducing furnace and polysilicon production line Download PDFInfo
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- CN220926283U CN220926283U CN202322178881.3U CN202322178881U CN220926283U CN 220926283 U CN220926283 U CN 220926283U CN 202322178881 U CN202322178881 U CN 202322178881U CN 220926283 U CN220926283 U CN 220926283U
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- 239000006227 byproduct Substances 0.000 title claims abstract description 77
- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 11
- 229920005591 polysilicon Polymers 0.000 title abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 53
- 230000006837 decompression Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000010992 reflux Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a recovery system of byproduct steam of a reducing furnace and a polysilicon production line, and relates to the technical field of polysilicon production, wherein the production line comprises the system, and the system comprises: a reduction furnace having a byproduct steam outlet; an electric boiler having a boiler steam outlet; a decompression station, the inlet of which is connected with the outlet of the byproduct steam, and the outlet of which is connected with the inlet of the multi-stage using equipment; the inlet of the pressurizing station is connected with the byproduct steam outlet and the boiler steam outlet, and the outlet of the pressurizing station is connected with the inlet of the multi-stage using equipment; the multi-stage using equipment is directly connected with the reduction furnace or the electric boiler or connected with the decompression station or the pressurization station. With the increase of the number of the reduction furnaces, the surplus byproduct steam can be used for multi-stage use equipment after pressure regulation, and the unnecessary byproduct steam is not required to be cooled into condensate to be reused by a cooler, so that the energy waste is reduced.
Description
Technical Field
The utility model relates to the technical field of polysilicon production, in particular to a recovery system for byproduct steam of a reducing furnace and a polysilicon production line.
Background
In the polysilicon production process by the improved Siemens method, the byproduct steam of the reduction furnace from the reduction furnace is generally 4 kg of steam, and after the byproduct steam is recycled (heat energy is utilized), only a part of equipment of enterprises can be used, and the byproduct steam (4 kg of steam) of the reduction furnace can not meet the use requirement due to the requirement of higher heating temperature, so that a gas boiler is required to be started to independently produce steam with higher pressure level (a gas boiler which is generally matched with 50t/h 12 kg of steam).
In the production process, based on the characteristics of the gas boiler, the gas boiler must be kept running to ensure steam supply, so that energy waste is caused; when a problem occurs in the gas boiler system, the recovery steam supply time is long, and the production is greatly affected.
In addition, as the number of open furnaces of the reduction furnaces increases, the recovered reduction furnace byproduct steam (4 kg steam) is excessive, and a cooler is required to be separately added to cool the excessive reduction furnace byproduct steam into condensate for reuse, which results in a large amount of energy (heat energy) being wasted.
Disclosure of utility model
Aiming at the situation, the utility model provides a byproduct steam recovery system of a reducing furnace and a polysilicon production line, which aim to solve the problem that in the production process, a gas boiler must be kept running to ensure steam supply, so that energy waste is caused; when a problem occurs in the gas boiler system, the recovery steam supply time is longer, and the production is greatly influenced; in addition, as the number of the reduction furnaces opened increases, the recovered reduction furnace byproduct steam is excessive, and a cooler is required to be separately added to cool the excessive reduction furnace byproduct steam into condensate for reuse, which causes a technical problem that a large amount of energy (heat energy) is wasted.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
In a first aspect, the present utility model provides a byproduct steam recovery system for a reduction furnace, which may mainly include:
A reduction furnace having a byproduct steam outlet;
An electric boiler having a boiler steam outlet;
A pressure reducing station, the inlet of which is connected with the byproduct steam outlet, and the outlet of which is connected with the inlet of the multi-stage using equipment;
A pressurizing station, the inlet of which is connected with the byproduct steam outlet and the boiler steam outlet, and the outlet of which is connected with the inlet of the multi-stage using equipment; and
And the multistage use equipment is directly connected with the byproduct steam outlet and the boiler steam outlet, or is connected with the byproduct steam outlet or the boiler steam outlet through the decompression station or the pressurization station.
In some embodiments of the utility model, the reduction furnace has a reduction return port, the electric boiler has a boiler return port, and the outlet of the multi-stage use apparatus is connected to the reduction return port and the boiler return port.
In some embodiments of the utility model, the electric boiler further has a backup boost conduit to which a pressure regulating valve is connected.
In some embodiments of the utility model, a water replenishing device for replenishing water to the reduction furnace and the electric boiler is further included.
In some embodiments of the utility model, the water replenishment device replenishes desalted water to the reduction furnace and the electric boiler.
In some embodiments of the utility model, the pressure of the byproduct steam in the byproduct steam outlet is 4 kg.
In some embodiments of the utility model, the pressure of the byproduct steam in the byproduct steam outlet is 6 kg.
In some embodiments of the utility model, the pressure of the boiler steam in the boiler steam outlet is 12 kg.
In some embodiments of the utility model, the multi-stage usage apparatus comprises:
S6, using equipment, wherein an inlet of the equipment is directly connected with the byproduct steam outlet;
s2, using equipment, wherein an inlet of the equipment is connected with an outlet of the decompression station;
s4, using equipment, wherein an inlet of the equipment is connected with an outlet of the decompression station; and
S12, using equipment, wherein the inlet of the equipment is connected with the outlet of the decompression station, and/or the inlet of the S12 is directly connected with the boiler steam outlet of the electric boiler;
wherein: the S6 using equipment refers to equipment with the required steam pressure of 6 kg, the S2 using equipment refers to equipment with the required steam pressure of 2 kg, the S4 using equipment refers to equipment with the required steam pressure of 4 kg, and the S12 using equipment refers to equipment with the required steam pressure of 12 kg.
In a second aspect, the utility model provides a polysilicon production line, which mainly comprises the byproduct steam recovery system of the reduction furnace.
The embodiment of the utility model has at least the following advantages or beneficial effects:
1. With the increase of the number of the reduction furnaces, the surplus byproduct steam can be used for multi-stage use equipment after pressure regulation, and the unnecessary byproduct steam is not required to be cooled into condensate to be reused by a cooler, so that the waste of energy (heat energy) is reduced.
2. After the electric boiler is started for a period of time for the first time, the electric boiler can be stopped to be used as a standby based on the characteristics of the electric boiler; on the one hand, compared with a gas boiler, the electric boiler has the advantages that the energy consumption is reduced because the electric boiler does not need to work all the time; on the other hand, the electric boiler has relatively short recovery time.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a structure of a byproduct vapor recovery system of a reduction furnace provided in this embodiment;
FIG. 2 is a schematic view of a prior art electric boiler;
fig. 3 is a schematic structural diagram of the pressure boosting pipe and the pressure regulating valve according to the present embodiment.
Icon:
1-a reduction furnace, 11-a byproduct steam outlet, 12-a reduction reflux port,
2-A water supplementing device, wherein the water supplementing device comprises a water supplementing device,
3-Electric boiler, 31-boiler steam outlet, 32-boiler return port, 33-standby pressure-increasing pipeline, 34-pressure regulating valve,
4-A pressure-reducing station for reducing the pressure of the fluid,
A 5-pressurizing station, wherein the pressurizing station is provided with a pressure sensor,
61-S6 using the device, 62-S2 using the device, 63-S4 using the device, 64-S12 using the device.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Examples
Referring to fig. 1 to 3, the present embodiment provides a polysilicon production line, which may mainly include a recovery system for byproduct steam of a reduction furnace; the recovery system of byproduct steam of the reducing furnace mainly comprises the reducing furnace, water supplementing equipment, an electric boiler, a decompression station, a pressurizing station and multi-stage using equipment.
The reduction furnace is provided with a byproduct steam outlet and a reduction reflux port; the byproduct steam outlet is used for discharging byproduct steam with the pressure of 6 kg; the byproduct steam is used by the multi-stage using equipment to generate condensate, the condensate returns to the reducing furnace from the reducing reflux port, and the condensate is used for supplementing water.
The water replenishing device is used for replenishing desalted water to the reduction furnace to generate byproduct steam and replenishing desalted water to the electric boiler to generate boiler steam.
The electric boiler is used for generating boiler steam with the pressure of 12 kg; the electric boiler is provided with a boiler steam outlet and a boiler return port; the boiler steam outlet is used for discharging boiler steam; after the boiler steam is used by the multi-stage using equipment, condensate is generated, the condensate returns to the electric boiler from the boiler reflux port, and the condensate is used for supplementing water.
The electric boiler is also provided with a standby boosting pipeline which is connected with a pressure regulating valve.
The pressure reducing station is used for reducing the pressure of the boiler steam and byproduct steam entering the pressure reducing station; the inlet of the decompression station is connected with the byproduct steam outlet of the reduction furnace, the outlet of the decompression station is connected with the inlet of the multistage use equipment, and the outlet of the multistage use equipment is connected with the reduction reflux port of the reduction furnace.
The pressurizing station is used for increasing the pressure of the boiler steam and byproduct steam entering the pressurizing station; the inlet of the pressurizing station is connected with the byproduct steam outlet of the reduction furnace and the boiler steam outlet of the electric boiler, the outlet of the pressurizing station is connected with the inlet of the multi-stage using equipment, and the outlet of the multi-stage using equipment is connected with the reduction reflux port of the reduction furnace and the boiler reflux port of the electric boiler.
The multi-stage using equipment is used for directly using the boiler steam and the byproduct steam, or using the boiler steam and the byproduct steam after pressure regulation by a pressure reducing station or a pressure increasing station; the used boiler steam is returned to the electric boiler, and the used byproduct steam is returned to the reduction furnace.
The multi-stage using device includes an S6 using device, an S2 using device, an S4 using device, and an S12 using device, wherein: the S6 using equipment refers to equipment with the required steam pressure of 6 kg, the S2 using equipment refers to equipment with the required steam pressure of 2 kg, the S4 using equipment refers to equipment with the required steam pressure of 4 kg, and the S12 using equipment refers to equipment with the required steam pressure of 12 kg.
S6, an inlet of the using equipment is directly connected with a byproduct steam outlet of the reduction furnace; s2, connecting an inlet of the using device with an outlet of the decompression station; s4, connecting an inlet of the using device with an outlet of the decompression station; the inlet of the S12 utilization device is connected with the outlet of the depressurization station, and/or the inlet of the S12 utilization device is directly connected with the boiler steam outlet of the electric boiler.
The working principle of the byproduct steam recovery system of the reducing furnace is as follows:
When the electric boiler is started for the first time, the pressure of byproduct steam of the reduction furnace is raised to 6 kg, and the electric boiler is used for generating boiler steam with the pressure of 12 kg; the boiler steam with the pressure of 12 kg passes through the decompression station to reach the S2 using equipment and the S4 using equipment, passes through the supercharging station or directly reaches the S12 using equipment; the byproduct steam with the pressure of 6 kg directly reaches the S6 using equipment, or reaches the S2 using equipment and the S4 using equipment through a decompression station, or reaches the S12 using equipment through a pressurization station; the byproduct steam and the boiler steam after use are respectively returned to the reduction furnace and the electric boiler.
After a period of initial start-up, the electric boiler can stop working for standby; after the electric boiler stops working, the standby pressure of the electric boiler can be increased by using the pressure regulating valve so as to keep the temperature in the electrode water tank of the electric boiler, namely, the electric boiler is in a hot standby state, and the steam supply can be realized within ten minutes after the electric boiler is restarted.
In combination with the above, the present embodiment has at least the following advantages:
1. with the increase of the number of the reduction furnaces, the surplus byproduct steam can be used for S2 using equipment, S4 using equipment and S12 using equipment after pressure regulation, and the surplus byproduct steam is not required to be cooled into condensate by a cooler to be reused, so that the waste of energy (heat energy) is reduced.
2. After the electric boiler is started for a period of time for the first time, the electric boiler can be stopped to be used as a standby based on the characteristics of the electric boiler; on the one hand, compared with a gas boiler, the electric boiler has the advantages that the energy consumption is reduced because the electric boiler does not need to work all the time; on the other hand, the electric boiler has relatively short recovery time.
3. After the electric boiler is stopped, the standby pressure of the electric boiler can be increased by using the pressure regulating valve so as to maintain the temperature in the electrode water tank of the electric boiler, namely, the electric boiler is in a hot standby state, so that the speed of recovering steam supply is further accelerated.
4. Compared with the prior art, the advantage of the embodiment that the pressure of the byproduct steam is increased from 4 kg to 6 kg is that the step utilization of energy is favorably met, specifically, the pressurizing station is used for mechanical pressurizing through the centrifugal compressor, the pressurizing station can compress 1 time of pressure once, namely, after the pressure of the byproduct steam is increased to 6 kg, the pressurizing station can be used for increasing the pressure of the byproduct steam to 12 kg once, and the use of various equipment can be met; however, 4 kg of byproduct steam needs to be compressed twice to reach 12 kg, which increases the investment in equipment and wastes energy.
Finally, it should be noted that: the above is only a preferred embodiment of the present utility model, and it is not intended to limit the present utility model, and various modifications and variations of the present utility model may be possible to those skilled in the art, and the embodiments of the present utility model and features in the embodiments may be arbitrarily combined with each other without collision. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. A reduction furnace byproduct steam recovery system, characterized by comprising:
A reduction furnace having a byproduct steam outlet;
An electric boiler having a boiler steam outlet;
A pressure reducing station, the inlet of which is connected with the byproduct steam outlet, and the outlet of which is connected with the inlet of the multi-stage using equipment;
A pressurizing station, the inlet of which is connected with the byproduct steam outlet and the boiler steam outlet, and the outlet of which is connected with the inlet of the multi-stage using equipment; and
And the multistage use equipment is directly connected with the byproduct steam outlet or the boiler steam outlet, or is connected with the byproduct steam outlet or the boiler steam outlet through the decompression station or the pressurization station.
2. The by-product vapor recovery system of a reduction furnace according to claim 1, wherein the reduction furnace has a reduction return port, the electric boiler has a boiler return port, and the outlet of the multi-stage use apparatus is connected to the reduction return port and the boiler return port.
3. The by-product vapor recovery system of a reduction furnace according to claim 1, wherein the electric boiler further has a backup pressure increasing pipe to which a pressure regulating valve is connected.
4. The by-product vapor recovery system of a reduction furnace according to claim 1, further comprising a water replenishing device for replenishing water to the reduction furnace and the electric boiler.
5. The by-product vapor recovery system of a reduction furnace according to claim 1, wherein the pressure of the by-product vapor in the by-product vapor outlet is 4 kg.
6. The by-product steam recovery system for a reduction furnace according to any one of claims 1 to 4, wherein the pressure of the by-product steam in the by-product steam outlet is 6 kg.
7. The by-product vapor recovery system of a reduction furnace according to claim 6, wherein the pressure of the boiler vapor in the boiler vapor outlet is 12 kg.
8. The reduction furnace byproduct steam recovery system of claim 7 wherein said multi-stage utilization apparatus comprises:
S6, using equipment, wherein an inlet of the equipment is directly connected with the byproduct steam outlet;
s2, using equipment, wherein an inlet of the equipment is connected with an outlet of the decompression station;
s4, using equipment, wherein an inlet of the equipment is connected with an outlet of the decompression station; and
S12, using equipment, wherein the inlet of the equipment is connected with the outlet of the decompression station, and/or the inlet of the S12 is directly connected with the boiler steam outlet of the electric boiler;
wherein: the S6 using equipment refers to equipment with the required steam pressure of 6 kg, the S2 using equipment refers to equipment with the required steam pressure of 2 kg, the S4 using equipment refers to equipment with the required steam pressure of 4 kg, and the S12 using equipment refers to equipment with the required steam pressure of 12 kg.
9. A polycrystalline silicon production line, characterized by comprising the reduction furnace byproduct steam recovery system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322178881.3U CN220926283U (en) | 2023-08-14 | 2023-08-14 | Byproduct steam recovery system of reducing furnace and polysilicon production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322178881.3U CN220926283U (en) | 2023-08-14 | 2023-08-14 | Byproduct steam recovery system of reducing furnace and polysilicon production line |
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| CN220926283U true CN220926283U (en) | 2024-05-10 |
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| CN202322178881.3U Active CN220926283U (en) | 2023-08-14 | 2023-08-14 | Byproduct steam recovery system of reducing furnace and polysilicon production line |
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| CN (1) | CN220926283U (en) |
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- 2023-08-14 CN CN202322178881.3U patent/CN220926283U/en active Active
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