CN218833601U - Steam utilization system in polycrystalline silicon production process - Google Patents
Steam utilization system in polycrystalline silicon production process Download PDFInfo
- Publication number
- CN218833601U CN218833601U CN202223182883.1U CN202223182883U CN218833601U CN 218833601 U CN218833601 U CN 218833601U CN 202223182883 U CN202223182883 U CN 202223182883U CN 218833601 U CN218833601 U CN 218833601U
- Authority
- CN
- China
- Prior art keywords
- steam
- cooling subsystem
- pipeline
- outlet
- flash tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model relates to the technical field of polysilicon production, in particular to a steam utilization system in the polysilicon production process, which comprises a jacket cooling subsystem, a chassis cooling subsystem, a rectifying tower, a flash tank, a main steam pipe and waste heat power generation equipment; a steam outlet in the jacket cooling subsystem is connected with a steam inlet of the rectifying tower through a pipeline, a steam condensate outlet of the rectifying tower is connected with an inlet end of the flash tank through a pipeline, and a steam outlet of the flash tank is connected with a main steam pipe; a steam outlet of the chassis cooling subsystem is connected with a main steam pipe through a pipeline; the steam main pipe is used for mixing steam and then sending the mixed steam into the waste heat power generation equipment. Through the system, the problem of large heat energy loss can be effectively solved, and resources are saved conveniently.
Description
Technical Field
The utility model relates to a polycrystalline silicon production technical field especially relates to a steam utilization system in polycrystalline silicon production process.
Background
At present, in the production process of polycrystalline silicon, a polycrystalline silicon reduction furnace is used in the reduction process, and the polycrystalline silicon reduction furnace is a core device in the production of polycrystalline silicon. The polysilicon reduction furnace generally needs to be provided with a cooling system, and generally comprises a jacket cooling subsystem and a chassis cooling subsystem. The jacket cooling subsystem is used for keeping the temperature of the inner wall of the reduction furnace jacket, and needs to introduce a cooling medium into the reduction furnace jacket and remove the heat radiated to the inner wall of the jacket by the silicon rod. A common refrigerant is desalted water. The chassis cooling subsystem is used for keeping the temperature of the chassis of the reduction furnace, and cooling media need to be introduced into the chassis of the reduction furnace to remove the heat radiated by the silicon rods. A common refrigerant is desalted water.
During operation of the reduction furnace, the jacket cooling subsystem produces 0.4Mpa of steam and the chassis cooling subsystem produces 0.2Mpa of steam. 0.4Mpa steam can be directly used for rectification, 135 ℃ steam condensate can be generated by the used 0.4Mpa steam, in order to effectively utilize the part of steam condensate, domestic manufacturers utilize air cooling or circulating water to condense the redundant steam, and recover the steam condensate, but the redundant heat is consumed by the circulating water or the air cooling, and a large amount of energy consumption loss is caused by the part.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a steam utilization system in polycrystalline silicon production process, which can effectively solve the problem of large heat energy loss and is convenient for saving resources.
The utility model discloses a realize through adopting following technical scheme:
a steam utilization system in the production process of polycrystalline silicon comprises a jacket cooling subsystem and a chassis cooling subsystem, and is characterized in that: the system also comprises a rectifying tower, a flash tank, a main steam pipe and waste heat power generation equipment; a steam outlet in the jacket cooling subsystem is connected with a steam inlet of the rectifying tower through a pipeline, a steam condensate outlet of the rectifying tower is connected with an inlet end of the flash tank through a pipeline, and a steam outlet of the flash tank is connected with a main steam pipe; a steam outlet of the chassis cooling subsystem is connected with the main steam pipe through a pipeline; the main steam pipe is used for mixing steam and then sending the mixed steam into the waste heat power generation equipment.
And a steam condensate outlet of the waste heat power generation equipment is connected with a liquid inlet of the chassis cooling subsystem through a pipeline, and a liquid outlet of the chassis cooling subsystem is connected with a liquid inlet of the jacket cooling subsystem through a first pipeline.
The chassis cooling system is characterized by further comprising a water return pipe connected with a liquid inlet of the jacket cooling subsystem, a pump is arranged on the water return pipe, and the first pipeline is connected with the water return pipe to realize that a liquid outlet of the chassis cooling subsystem is connected with a liquid inlet of the jacket cooling subsystem.
And a condensate outlet of the flash tank is connected with the water return pipe through a second pipeline.
The number of the pumps is two, and the two pumps are respectively arranged on the first pipeline and the second pipeline.
And the rectifying tower and the flash tank are respectively provided with a pressure regulating device for controlling the pressure of the rectifying tower and the pressure of the flash tank to be 190-210Kpa.
Compared with the prior art, the beneficial effects of the utility model are shown in:
1. the utility model discloses in, carry out different processing with the steam of the different pressure that the different positions of reducing furnace produced, specifically for the steam of 0.4Mpa that will press from both sides the production of cover cooling subsystem uses the back through the rectifying column, produces the steam condensate, and the flash tank carries out abundant flash distillation with this part steam condensate again, flash distillation out the saturated steam of 0.2Mpa, and the steam of 0.2Mpa that this part steam and chassis cooling subsystem produced delivers to waste heat power generation equipment. Utilize the steam turbine among the waste heat power generation facility to change heat energy into kinetic energy, change kinetic energy into electric energy again, avoid prior art directly to utilize circulating water or air cooler to directly absorb the heat energy of low-grade steam, greatly reduced energy consumption improves energy utilization.
2. The utility model discloses in, exhaust steam condensate of waste heat power generation equipment is used for letting in chassis cooling subsystem, and as the make-up fluid in the lump with current demineralized water, at chassis cooling subsystem mesocycle for absorb the heat of silicon rod radiation, produce 0.2Mpa steam and steam condensate once more, and this steam condensate is let in and presss from both sides cover cooling subsystem and is used for carrying out the heat exchange once more.
In the process, the chassis cooling subsystem carries out heat exchange all the time, and one inlet and one outlet are always in circulating operation, so that the heat absorption effect is better. The heat in the steam condensate discharged by the waste heat power generation equipment and the chassis cooling subsystem can be reused, so that the heat energy loss is lower, the chassis cooling subsystem utilizes the steam condensate discharged by the waste heat power generation equipment to more easily generate 0.2Mpa steam, and the jacket cooling subsystem utilizes the steam condensate discharged by the chassis cooling subsystem to more easily generate 0.4Mpa steam.
3. Through the setting of wet return and first pipeline for the pipe network is arranged more rationally, also is convenient for set up parts such as valve on first pipeline for the leakage fluid volume and the easy access etc. of control chassis cooling subsystem.
4. And a condensate outlet of the flash tank is connected with the water return pipe through a second pipeline, so that the flashed steam condensate of 120 ℃ can be conveniently pumped to the jacket cooling subsystem, the heat can be conveniently further recovered, and the steam of 0.4Mpa can be generated again.
5. The number of the pumps is two, the pumps are respectively arranged on the first pipeline and the second pipeline and are used for respectively pumping corresponding steam condensate to the water return pipe, so that the two conveying pipelines of the first pipeline and the second pipeline can independently operate and are not interfered with each other.
6. In the operation process, the pressure of the rectifying tower and the pressure of the flash tank can be controlled to be 190-210Kpa by setting the pressure regulating device, so that the stability of the whole 0.2Mpa steam pipe network is ensured, and the stability of the inlet air of the waste heat power generation equipment is ensured.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
fig. 1 is a schematic structural diagram of the present invention, wherein S4 represents 4bar steam, S2 represents 2bar steam, C4 represents 4bar steam condensate, and C1 represents 1bar steam condensate;
the labels in the figure are:
1. the system comprises a jacket cooling subsystem 2, a chassis cooling subsystem 3, a rectifying tower 4, a flash tank 5, a steam main pipe 6, a waste heat power generation device 7, a first pipeline 8, a water return pipe 9, a second pipeline 10 and a pump.
Detailed Description
Example 1
As the basic implementation mode of the utility model, the utility model discloses a steam utilization system in polycrystalline silicon production process, including pressing from both sides cover cooling subsystem 1, chassis cooling subsystem 2, rectifying column 3, flash tank 4, steam person in charge 5 and waste heat power generation equipment 6. A steam outlet in the jacket cooling subsystem 1 is connected with a steam inlet of the rectifying tower 3 through a pipeline, a steam condensate outlet of the rectifying tower 3 is connected with an inlet end of the flash tank 4 through a pipeline, and a steam outlet of the flash tank 4 is connected with a main steam pipe 5. And a steam outlet of the chassis cooling subsystem 2 is connected with a main steam pipe 5 through a pipeline. The main steam pipe 5 is used for mixing steam and then sending the mixed steam to the waste heat power generation equipment 6.
Example 2
As a better embodiment of the utility model, the utility model discloses a steam utilization system in polycrystalline silicon production process, including pressing from both sides cover cooling subsystem 1, chassis cooling subsystem 2, rectifying column 3, flash tank 4, steam person in charge 5 and waste heat power generation equipment 6. A steam outlet in the jacket cooling subsystem 1 is connected with a steam inlet of the rectifying tower 3 through a pipeline, a steam condensate outlet of the rectifying tower 3 is connected with an inlet end of the flash tank 4 through a pipeline, and a steam outlet of the flash tank 4 is connected with a main steam pipe 5.
And a steam outlet of the chassis cooling subsystem 2 is connected with a main steam pipe 5 through a pipeline. The main steam pipe 5 is used for mixing steam and then sending the mixed steam to the waste heat power generation equipment 6. And a steam condensate outlet of the waste heat power generation equipment 6 is connected with a liquid inlet of the chassis cooling subsystem 2 through a pipeline, and a liquid outlet of the chassis cooling subsystem 2 is connected with a liquid inlet of the jacket cooling subsystem 1 through a first pipeline 7.
Example 3
As another preferred embodiment of the present invention, the present invention includes a steam utilization system in the polysilicon production process, which comprises a jacket cooling subsystem 1, a chassis cooling subsystem 2, a rectifying tower 3, a flash tank 4, a steam main pipe 5, a water return pipe 8 and a waste heat power generation device 6. A steam outlet in the jacket cooling subsystem 1 is connected with a steam inlet of the rectifying tower 3 through a pipeline, a steam condensate outlet of the rectifying tower 3 is connected with an inlet end of the flash tank 4 through a pipeline, and a steam outlet of the flash tank 4 is connected with a main steam pipe 5. And a steam outlet of the chassis cooling subsystem 2 is connected with a main steam pipe 5 through a pipeline. The main steam pipe 5 is used for mixing steam and then sending the mixed steam to the waste heat power generation equipment 6.
The water return pipe 8 is connected with a liquid inlet of the jacket cooling subsystem 1, and a pump 10 is arranged on the water return pipe 8. And a steam condensate outlet of the waste heat power generation equipment 6 is connected with a liquid inlet of the chassis cooling subsystem 2 through a pipeline, and a liquid outlet of the chassis cooling subsystem 2 is connected with a water return pipe 8 through a first pipeline 7. And a condensed water outlet of the flash tank 4 is connected with the water return pipe 8 through a second pipeline 9.
Example 4
As the best mode of the utility model, referring to the attached figure 1 of the specification, the utility model discloses a steam utilization system in polycrystalline silicon production process, including pressing from both sides cover cooling subsystem 1, chassis cooling subsystem 2, rectifying column 3, flash tank 4, steam main pipe 5, wet return 8 and waste heat power generation equipment 6. The jacket cooling subsystem 1 and the chassis cooling subsystem 2 are conventional structures in the field, and generally comprise a liquid inlet, a liquid outlet and a circulating pipeline, wherein circulating liquid is injected from the liquid inlet, circulates along the circulating pipeline and is discharged from the liquid outlet, and the circulating liquid can be desalted water and continuously circulates to take away heat.
The steam outlet of the jacket cooling subsystem 1 is connected with the steam inlet of the rectifying tower 3 through a pipeline, the steam condensate outlet of the rectifying tower 3 is connected with the inlet end of the flash tank 4 through a pipeline, the steam outlet of the flash tank 4 is connected with the main steam pipe 5, and the condensate outlet of the flash tank 4 is connected with the water return pipe 8 through a second pipeline 9.
A steam outlet of the chassis cooling subsystem 2 is connected with a main steam pipe 5 through a pipeline; and a liquid outlet of the chassis cooling subsystem 2 is connected with the water return pipe 8 through a first pipeline 7. The first pipeline 7 and the second pipeline 9 are respectively provided with a pump 10, the other end of the water return pipe 8 is connected with a liquid inlet of the jacket cooling subsystem 1, the pump 10 is used for pumping liquid into the jacket cooling subsystem 1 to supplement circulating liquid for the jacket cooling subsystem 1, and due to the temperature of the pump, the pump is convenient for generating corresponding steam after absorbing heat better.
The main steam pipe 5 is used for mixing steam and then sending the mixed steam to the waste heat power generation equipment 6. The waste heat power generation equipment 6 can comprise a steam turbine, a steam condensate outlet of the waste heat power generation equipment 6 is connected with a liquid inlet of the chassis cooling subsystem 2 through a pipeline and used for supplementing circulating liquid for the chassis cooling subsystem 2, and due to the temperature of the waste heat power generation equipment, corresponding steam can be generated after better heat absorption.
The rectifying tower 3 and the flash tank 4 are respectively provided with a pressure regulating device, and the pressure regulating devices can be realized by adopting conventional structures in the field, and comprise pressure control valves and the like. Through the pressure adjusting device, the pressure of the rectifying tower 3 and the pressure of the flash tank 4 can be controlled between 190 Kpa and 210Kpa in the operation process, so that the stability of the whole 0.2Mpa steam pipe network is ensured, and the stability of the air inlet of the waste heat power generation equipment 6 is ensured.
Through the connecting pipeline, the jacket cooling subsystem 1 absorbs heat to generate 0.4Mpa steam which can be supplied to the rectifying tower 3 for use, and 135 ℃ steam condensate (corresponding saturated steam pressure is 0.22 Mpa) after the rectifying tower 3 is used enters the flash tank 4 for flash evaporation, generates 0.2Mpa steam and is merged into the steam main pipe 5, and finally is supplied to the waste heat power generation equipment 6 for power generation. Steam condensate of 60-80 ℃ and 1bar generated after the power generation of the waste heat power generation equipment 6 is used for being sent to the chassis cooling subsystem 2, so that 0.2Mpa steam can be generated as a byproduct again and is supplied to the waste heat power generation equipment 6 again for power generation. And (3) respectively feeding the flashed 120-DEG C steam condensate and the steam condensate generated by the chassis cooling subsystem 2 to the jacket cooling subsystem 1 through a pump 10, and generating a byproduct of 0.4MPa steam again, and circulating until the production is finished.
In conclusion, after the person skilled in the art reads the document of the present invention, the technical solutions and concepts of the present invention do not need to create mental labor, and other various corresponding transformation schemes are all included in the protection scope of the present invention.
Claims (6)
1. A steam utilization system in a polycrystalline silicon production process comprises a jacket cooling subsystem (1) and a chassis cooling subsystem (2), and is characterized in that: the system also comprises a rectifying tower (3), a flash tank (4), a main steam pipe (5) and waste heat power generation equipment (6); a steam outlet in the jacket cooling subsystem (1) is connected with a steam inlet of the rectifying tower (3) through a pipeline, a steam condensate outlet of the rectifying tower (3) is connected with an inlet end of the flash tank (4) through a pipeline, and a steam outlet of the flash tank (4) is connected with a main steam pipe (5); a steam outlet of the chassis cooling subsystem (2) is connected with a main steam pipe (5) through a pipeline; the main steam pipe (5) is used for mixing steam and then sending the mixed steam to the waste heat power generation equipment (6).
2. The steam utilization system in the production process of the polycrystalline silicon as set forth in claim 1, wherein: the steam condensate outlet of the waste heat power generation equipment (6) is connected with the liquid inlet of the chassis cooling subsystem (2) through a pipeline, and the liquid outlet of the chassis cooling subsystem (2) is connected with the liquid inlet of the jacket cooling subsystem (1) through a first pipeline (7).
3. The steam utilization system in the production process of the polycrystalline silicon as set forth in claim 2, wherein: still include wet return (8) that link to each other with the inlet of jacket cooling subsystem (1), be equipped with pump (10) on wet return (8), first pipeline (7) are through linking to each other with wet return (8), realize that the liquid outlet of chassis cooling subsystem (2) links to each other with the inlet of jacket cooling subsystem (1).
4. The steam utilization system in the production process of the polycrystalline silicon as set forth in claim 3, wherein: and a condensate outlet of the flash tank (4) is connected with the water return pipe (8) through a second pipeline (9).
5. The steam utilization system in the production process of the polycrystalline silicon as set forth in claim 4, wherein: the number of the pumps (10) is two, and the pumps are respectively arranged on the first pipeline (7) and the second pipeline (9).
6. The steam utilization system in the production process of the polycrystalline silicon as set forth in claim 1, wherein: and the rectifying tower (3) and the flash tank (4) are respectively provided with a pressure regulating device for controlling the pressure of the rectifying tower (3) and the pressure of the flash tank (4) to be 190-210Kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182883.1U CN218833601U (en) | 2022-11-30 | 2022-11-30 | Steam utilization system in polycrystalline silicon production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182883.1U CN218833601U (en) | 2022-11-30 | 2022-11-30 | Steam utilization system in polycrystalline silicon production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218833601U true CN218833601U (en) | 2023-04-11 |
Family
ID=87306416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223182883.1U Active CN218833601U (en) | 2022-11-30 | 2022-11-30 | Steam utilization system in polycrystalline silicon production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218833601U (en) |
-
2022
- 2022-11-30 CN CN202223182883.1U patent/CN218833601U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102022144B (en) | Thermal power generation system with function of exhaust steam recovery | |
| CN202381129U (en) | Power supplying system | |
| CN112856849A (en) | Thermal power system energy storage peak regulation system for recovering latent heat in flue gas and working method | |
| CN110454760B (en) | Fermentation tank empty waste heat recovery device and process | |
| CN110078904B (en) | Polyester esterification steam waste heat utilization method and device | |
| CN113375209B (en) | Large temperature difference heat supply method and system for coal-fired unit coupling compression heat pump | |
| CN202647718U (en) | Supercritical clamminess heating machine set heat supply net drainage treating system | |
| CN214665329U (en) | Thermal power system energy storage peak regulation system for recovering latent heat in flue gas | |
| CN105953215B (en) | A kind of demineralized water absorbs the recovery system of steam power plant's waste heat | |
| CN218833601U (en) | Steam utilization system in polycrystalline silicon production process | |
| CN110259537B (en) | Carbon dioxide Rankine cycle power system and operation method thereof | |
| CN201803601U (en) | Comprehensive utilization system for heat energy of reducing furnace | |
| CN101788141B (en) | Application of absorption type heat regenerator in regenerative circulation system of power plant | |
| CN111397248A (en) | Green heat pump refrigerating and heating device applied to working of steam turbine | |
| CN208282663U (en) | A kind of nuclear steam turbine group circulating water waste heat utilization | |
| CN205807387U (en) | Power plant's demineralized water absorbs residual neat recovering system | |
| CN213840883U (en) | Chemical water replenishing system utilizing dead steam waste heat of direct air cooling unit | |
| CN210069822U (en) | High-pressure high-temperature condensed water flash evaporation recovery system | |
| CN203907580U (en) | Condensate water recovery system based on condensation water returning heat exchanger | |
| CN210030526U (en) | Polyester esterification steam waste heat utilization equipment | |
| CN107191992A (en) | A kind of air compression station heat recovery cyclic utilization system | |
| CN206817578U (en) | A kind of air compression station heat recovery cyclic utilization system | |
| CN104006374A (en) | Condensate water recovery system based on returned condensate water heat exchanger and working method | |
| CN219605363U (en) | System for generating power by using waste heat of process waste hot water | |
| CN211716914U (en) | Energy-saving consumption-reducing device for comprehensive utilization of energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |