CN211260746U - Polycrystalline silicon reduction byproduct steam recovery system - Google Patents
Polycrystalline silicon reduction byproduct steam recovery system Download PDFInfo
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- CN211260746U CN211260746U CN201922310453.5U CN201922310453U CN211260746U CN 211260746 U CN211260746 U CN 211260746U CN 201922310453 U CN201922310453 U CN 201922310453U CN 211260746 U CN211260746 U CN 211260746U
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Abstract
The application discloses polycrystalline silicon reduction by-product steam recovery system, including the low pressure steam trunk line that is connected to reduction flash distillation device and the middling pressure steam trunk line that is connected to the middling pressure steam user, the low pressure steam trunk line with still be connected with between the middling pressure steam trunk line and be used for the vapor compressor who is the middling pressure steam with low pressure vapor compression, vapor compressor with middling pressure steam passageway between the middling pressure steam trunk line still has a branch road, the branch road is connected to humidification device, humidification device is used for injecting water the branch road and with middling pressure steam mixes and forms saturated steam and gets into the middling pressure steam trunk line. The polycrystalline silicon reduction byproduct steam recovery system can reduce energy waste, reduce consumption of circulating water and reduce production cost.
Description
Technical Field
The utility model relates to a semiconductor material makes technical field, more specifically says, relates to a polycrystalline silicon reduction by-product steam recovery system.
Background
At present, the polysilicon industry pays more and more attention to the recovery of the reduction heat energy, the reduction heat energy is mainly recovered in a byproduct steam mode, and the low-pressure steam of the reduction byproduct cannot be completely consumed in other processes along with the improvement of the recovery rate of the reduction heat energy, so that the redundant steam needs to be cooled by circulating water, the waste of energy is caused, and the consumption of the circulating water is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a polycrystalline silicon reduction by-product steam recovery system can reduce the waste of energy, reduces the consumption of circulating water, reduction in production cost.
The utility model provides a pair of polycrystalline silicon reduction by-product steam recovery system, including the low pressure steam trunk line that is connected to reduction flash distillation unit and the middling pressure steam trunk line that is connected to the middling pressure steam user, the low pressure steam trunk line with still be connected with between the middling pressure steam trunk line and be used for the vapor compressor who is the middling pressure steam with low pressure vapor compression for middling pressure steam, vapor compressor with middling pressure steam passage between the middling pressure steam trunk line still has a branch road, the branch road is connected to humidification device, humidification device is used for injecting water the branch road and with middling pressure steam mixes and forms saturated steam and gets into the middling pressure steam trunk line.
Preferably, in the above-described system for recovering a byproduct vapor from the reduction of polycrystalline silicon, the humidifying device is connected to the medium-pressure vapor passage through a temperature regulating valve.
Preferably, in the above system for recovering a byproduct vapor from the reduction of polycrystalline silicon, the vapor compressor is a centrifugal compressor or a steam turbine compressor.
Preferably, in the system for recovering a byproduct vapor from the reduction of polycrystalline silicon, the humidifying device is a water pump.
Preferably, in the above system for recovering a byproduct vapor from the reduction of polycrystalline silicon, the vapor compressor is a vapor compressor having a compression ratio of 1.5 to 2.
Preferably, in the above system for recovering a byproduct vapor from the reduction of polycrystalline silicon, the medium-pressure steam user is a cold hydrogenation apparatus.
According to the above technical scheme, the utility model provides an above-mentioned polycrystalline silicon reduction by-product steam recovery system, because low pressure steam trunk line with still be connected with the vapor compressor who is used for low pressure vapor compression to middling pressure steam between the middling pressure steam trunk line, vapor compressor with middling pressure steam passageway between the middling pressure steam trunk line still has a branch road, the branch road is connected to humidification device, humidification device is used for injecting water the branch road and with middling pressure steam mixes and forms saturated steam and get into middling pressure steam trunk line, consequently can carry out recycle with the unnecessary part of reduction by-product steam, reduces the consumption of outer benefit middling pressure steam to can the waste of energy reduces the consumption of circulating water, reduction in production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a system for recovering by-product vapor from the reduction of polysilicon according to the present application.
Detailed Description
The core of the utility model is to provide a polycrystalline silicon reduction by-product steam recovery system, can reduce the waste of energy, reduce the consumption of circulating water, reduction in production cost.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic view of a polysilicon reduction byproduct steam recovery system provided by the present application, where the polysilicon reduction byproduct steam recovery system includes a main low-pressure steam pipe 2 connected to a reduction flash apparatus 1 and a main medium-pressure steam pipe 4 connected to a medium-pressure steam user 3, it should be noted that in the prior art, redundant low-pressure steam in a byproduct is discharged, and some flows requiring medium-pressure steam need to introduce medium-pressure steam for external supplement again, so that there are problems of waste and high cost, and therefore, in this embodiment, the two are combined together, a steam compressor 5 for compressing low-pressure steam into medium-pressure steam is further connected between the main low-pressure steam pipe 3 and the main medium-pressure steam pipe 4, in this case, most of the low-pressure steam is still supplied to the relevant users, and the surplus low-pressure steam can be sent to the steam compressor 5 for pressurization through the low-pressure steam regulating valve, and the medium-pressure steam passage between the steam compressor 5 and the medium-pressure steam main pipe 4 is also provided with a branch which is connected to the humidifying device 6, and the humidifying device 6 is used for spraying water into the branch and mixing the water with the medium-pressure steam to form saturated steam to enter the medium-pressure steam main pipe 4, so that the recycling of the surplus low-pressure steam is realized, and the flow needing the medium-pressure steam does not need to be introduced from external supplement, thereby reducing the production cost in both aspects.
According to the technical scheme, the embodiment of above-mentioned polycrystalline silicon reduction by-product steam recovery system that this application provided, because still be connected with the vapor compressor who is used for compressing the low pressure steam to middling pressure steam between low pressure steam main pipe and the middling pressure steam main pipe, the middling pressure steam passageway between vapor compressor and the middling pressure steam main pipe still has a branch road, the branch road is connected to humidification device, humidification device is used for spouting water into the branch road and forms saturated steam with middling pressure steam mixture and gets into middling pressure steam main pipe, consequently, can carry out recycle with the unnecessary part of reduction by-product steam, reduce the consumption of outer benefit middling pressure steam, thereby can reduce the waste of energy, reduce the consumption of circulating water, and the production cost is reduced.
In one embodiment of the above-described system for recovering a byproduct vapor from the reduction of polycrystalline silicon, with continued reference to fig. 1, the humidifying device 6 is connected to the medium-pressure vapor passage through a temperature regulating valve 7, and the temperature of the pressurized vapor can be adjusted to saturated vapor by such a temperature regulating valve 7.
In another embodiment, the vapor compressor 5 may be preferably a centrifugal compressor or a steam turbine compressor, wherein the centrifugal compressor can make the vapor obtain higher pressure, the processing capacity is larger, and the efficiency is higher, and the steam turbine compressor increases the gas pressure by the interaction force between the rotating impeller and the gas flow, and makes the gas flow generate acceleration to obtain kinetic energy, then the gas flow decelerates in the diffuser to convert the kinetic energy into pressure energy, further increasing the pressure, the gas flow is continuous in the compression process, and is widely used for conveying air and various gases in various processes and increasing the pressure thereof, although other types of vapor compressors can be selected according to the actual needs, and the invention is not limited herein.
Further, the vapor compressor may be a vapor compressor having a compression ratio of 1.5 to 2, which can effectively compress low-pressure vapor to medium-pressure vapor and is low in cost.
In another embodiment of the above system for recovering byproduct steam from polysilicon reduction, the humidifying device 6 may preferably be a water pump, it should be noted that superheated medium-pressure steam is obtained after pressurization, and saturated steam actually required by a user, so that the superheated medium-pressure steam needs to be sprayed by the water pump to become saturated medium-pressure steam, so as to be reasonably used by the user, and if the water pump is adopted, the cost is lower, the operation is simple, and of course, other types of humidifying devices can be selected according to actual needs, and this is not limited here.
The application also provides another preferred embodiment, wherein the medium-pressure steam user 3 is a cold hydrogenation device, in this case, a production example is used for illustration, the low-pressure steam in the reduction by-product is rich in 30t/h, and the cold hydrogenation device needs to supplement the medium-pressure steam for 30t/h, through the embodiment, the low-pressure steam rich in the reduction can be used for the cold hydrogenation device after being pressurized, so that the steam consumption can be saved by 30t per hour, and the circulating water consumption is reduced by about 1500m3And/h, 22296 tons of standard coal can be saved every year.
It should be noted that the vapor pressure of the main low-pressure steam pipe may preferably be 0.2MPa · G to 0.5MPa · G, and the vapor pressure of the main medium-pressure steam pipe may preferably be 0.4MPa · G to 1.0MPa · G, where the unit MPa · G is a gauge pressure, i.e., a value equal to an absolute pressure plus a standard atmospheric pressure.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a polycrystalline silicon reduction by-product steam recovery system, is including the low pressure steam trunk line that is connected to reduction flash distillation device and the middling pressure steam trunk line that is connected to the middling pressure steam user, its characterized in that, the low pressure steam trunk line with still be connected with between the middling pressure steam trunk line and be used for the vapor compressor who is low pressure vapor compression to middling pressure steam, vapor compressor with middling pressure steam passageway between the middling pressure steam trunk line still has a branch road, the branch road is connected to humidification device, humidification device is used for with water is injected the branch road and with the middling pressure steam mixes and forms saturated steam and gets into the middling pressure steam trunk line.
2. The system for recovering by-product vapor from the reduction of polycrystalline silicon according to claim 1, wherein the humidifying device is connected to the medium-pressure vapor passage through a temperature regulating valve.
3. The system for recovering the byproduct vapor from the reduction of polycrystalline silicon according to claim 1, wherein the vapor compressor is a centrifugal compressor or a vapor turbine compressor.
4. The system for recovering the byproduct vapor from the reduction of polysilicon according to claim 1, wherein the humidifying device is a water pump.
5. The system for recovering the byproduct vapor from the reduction of polycrystalline silicon according to claim 1, wherein the vapor compressor is a vapor compressor having a compression ratio of 1.5 to 2.
6. The system for recovering by-product vapor from the reduction of polycrystalline silicon according to claim 1, wherein the medium-pressure steam user is a cold hydrogenation apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922310453.5U CN211260746U (en) | 2019-12-20 | 2019-12-20 | Polycrystalline silicon reduction byproduct steam recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922310453.5U CN211260746U (en) | 2019-12-20 | 2019-12-20 | Polycrystalline silicon reduction byproduct steam recovery system |
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| Publication Number | Publication Date |
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| CN211260746U true CN211260746U (en) | 2020-08-14 |
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| CN201922310453.5U Active CN211260746U (en) | 2019-12-20 | 2019-12-20 | Polycrystalline silicon reduction byproduct steam recovery system |
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| CN (1) | CN211260746U (en) |
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