CN213928478U - Steam turbine shaft seal steam recycling device - Google Patents
Steam turbine shaft seal steam recycling device Download PDFInfo
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- CN213928478U CN213928478U CN202022827105.8U CN202022827105U CN213928478U CN 213928478 U CN213928478 U CN 213928478U CN 202022827105 U CN202022827105 U CN 202022827105U CN 213928478 U CN213928478 U CN 213928478U
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Abstract
The utility model discloses a steam turbine shaft seal vapour recycle device sets up between steam turbine and oxygen-eliminating device, be equipped with shaft seal vapour retrieval and utilization pipe on the steam turbine, be equipped with high temperature vapour supply pipe on the oxygen-eliminating device, high temperature vapour supply pipe is connected with the steam jet and is responsible for, the last steam jet ware that is equipped with of steam jet is responsible for, steam jet is responsible for and is located high temperature vapour supply pipe with be equipped with the bearing seal vapour between the steam jet ware and take out the steam pipe, shaft seal vapour retrieval and utilization pipe with bearing seal vapour extraction union coupling sets up. The utility model discloses steam turbine shaft seal vapour no longer gets into the gland cooler, and then the high temperature steam of directly sneaking into the oxygen-eliminating device uses, has removed heat transfer process's heat loss from, has improved energy utilization.
Description
Technical Field
The utility model relates to a steam turbine shaft seals vapour recycle device.
Background
In a heating system, a deaerator is generally used for deaerating water for a boiler, a water body is converted into steam after being heated by a series of equipment such as a boiler, and the steam is supplied to a steam turbine to complete output such as heating. The deaerator has the advantages that except for deaerating, the deaerator also has the function of mixing and heating, and the heat source of mixing and heating is supplied high-temperature steam; the steam turbine also adopts pressurized steam to seal the bearing, so to speak, in the heat supply system, the steam is not only a product but also a raw material.
For a steam turbine, shaft seal steam is kept flowing, flowing steam is usually transferred to a steam seal cooler for condensation after passing through a shaft seal, and the steam seal cooler also belongs to a heat exchanger in nature, so that heat released by shaft seal steam condensation is mostly transferred to other hot water supply bodies for recycling. However, the heat exchange efficiency of any heat exchanger is not 100%, and heat energy loss exists in the heat exchange process. For steam with a large amount of steam used for steam turbine shaft seal, the steam seal cooler is used only to cause a large amount of waste of heat energy. Therefore, the recycling of the shaft seal steam of the steam turbine needs to be improved so as to reduce the heat energy loss and improve the energy utilization rate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a reduce heat energy loss, improve energy utilization's steam turbine shaft seal vapour recycle device is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the shaft seal steam recycling device of the steam turbine is arranged between the steam turbine and a deaerator, a shaft seal steam recycling pipe is arranged on the steam turbine, a high-temperature steam supply pipe is arranged on the deaerator, the high-temperature steam supply pipe is connected with a steam jet main pipe, a steam jet device is arranged on the steam jet main pipe, a shaft seal steam extraction pipe is arranged on the steam jet main pipe and located between the high-temperature steam supply pipe and the steam jet device, and the shaft seal steam recycling pipe is connected with the shaft seal steam extraction pipe.
According to the preferable technical scheme, a shaft seal steam supplementing pipe is arranged between the shaft seal steam extraction pipe and the steam ejector on the steam jet main pipe, and a steam supplementing electric regulating valve is arranged on the shaft seal steam supplementing pipe.
As the preferred technical scheme, a shaft seal steam sealing valve is respectively arranged on the shaft seal steam extraction pipe and the shaft seal steam supplementing pipe.
As a preferred technical scheme, the steam jet main pipe is provided with a jet electric regulating valve.
By adopting the technical scheme, the shaft seal steam recycling device of the steam turbine is arranged between the steam turbine and the deaerator, the steam turbine is provided with a shaft seal steam recycling pipe, the deaerator is provided with a high-temperature steam supply pipe, the high-temperature steam supply pipe is connected with a steam jet main pipe, the steam jet main pipe is provided with a steam jet device, the steam jet main pipe is positioned between the high-temperature steam supply pipe and the steam jet device and is provided with a shaft seal steam extraction pipe, and the shaft seal steam recycling pipe is connected with the shaft seal steam extraction pipe. The utility model discloses steam turbine shaft seal vapour no longer gets into the gland cooler, and then the high temperature steam of directly sneaking into the oxygen-eliminating device uses, has removed heat transfer process's heat loss from, has improved energy utilization.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic diagram of an embodiment of the present invention.
In the figure: 1-shaft seal steam recycling pipe; 2-a deaerator; 3-high temperature steam supply pipe; 4-main steam jet pipe; 5-a steam jet device; 6-shaft seal steam extraction pipe; 7-shaft seal steam supplementing pipe; 8-steam-supplementing electric regulating valve; 9-shaft seal steam seal valve; 10-jet flow electric regulating valve.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, exemplary embodiments of the invention are described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the steam turbine shaft seal steam recycling device is arranged between a steam turbine and a deaerator 2, the steam turbine is provided with a shaft seal steam recycling pipe 1, the deaerator 2 is provided with a high-temperature steam supply pipe 3, the structure is a structure easily known in the prior art, and the structure is not repeated and the steam turbine is not shown in the figure.
The high-temperature steam supply pipe 3 is connected with a steam jet main pipe 4, and a steam jet device 5 is arranged on the steam jet main pipe 4. In heating systems, a steam ejector 5 is often used in a steam delivery pipeline to increase delivery pressure and delivery speed, which is well known to those skilled in the art and will not be described herein. Preferably, the main steam jet pipe 4 and the steam jet device 5 can directly adopt the existing pipeline and jet device in front of the high-temperature steam supply pipe 3 on the deaerator 2.
And a shaft seal steam extraction pipe 6 is arranged between the high-temperature steam supply pipe 3 and the steam jet device 5 on the steam jet main pipe 4, and the shaft seal steam reuse pipe 1 is connected with the shaft seal steam extraction pipe 6. Because the steam ejector 5 lifts the steam pressure in the steam jet main pipe 4, negative pressure suction is easily generated at the shaft seal steam extraction pipe 6, and the suction can promote the shaft seal steam at the shaft seal steam extraction pipe 6 to be quickly mixed into the steam jet main pipe 4. In the embodiment, the shaft seal steam is directly supplied to the steam jet main pipe 4 by the shaft seal steam extraction pipe 6 and is mixed with high-pressure steam for use, so that the loss of heat energy during heat exchange can be avoided, and the energy utilization rate is improved.
In this embodiment, a shaft seal steam supplementing pipe 7 is arranged between the shaft seal steam extraction pipe 6 and the steam ejector 5 on the steam jet main pipe 4, and a steam supplementing electric regulating valve 8 is arranged on the shaft seal steam supplementing pipe 7. When the pressure in the steam jet main pipe 4 becomes large, the negative pressure suction at the shaft seal steam extraction pipe 6 also becomes large, in order to avoid the influence of the increased negative pressure suction on the shaft seal steam used on the steam turbine, in this embodiment, the steam supplementing electric regulating valve 8 is used for opening the shaft seal steam supplementing pipe 7 to a certain extent, and part of high-pressure steam in the steam jet main pipe 4 can be mixed into the shaft seal steam extraction pipe 6 through the shaft seal steam supplementing pipe 7, so that the negative pressure suction in the shaft seal steam recycling pipe 1 is reduced, and the normal operation of the shaft seal steam on the steam turbine is ensured.
In this embodiment, the shaft seal steam extraction pipe 6 and the shaft seal steam supplementing pipe 7 are respectively provided with a shaft seal steam sealing valve 9. When the steam turbine is not operated and steam is still delivered in the main steam jet pipe 4, the two shaft seal steam seal closing valves 9 can be closed in this embodiment, so that the shaft seal steam recycling pipe 1 is completely separated from the main steam jet pipe 4, and the delivery of steam in the main steam jet pipe 4 does not interfere with the non-operation of the steam turbine.
In this embodiment, the steam jet main pipe 4 is provided with a jet electric regulating valve 10. When the pressure in the main steam jet pipe 4 continues to increase, the electric jet regulating valve 10 can temporarily reduce the pressure and flow of the main steam jet pipe 4 so as to avoid the influence of too high pressure on the shaft seal steam of the steam turbine. And when the pressure in the steam jet main pipe 4 is gradually recovered to be normal, the jet electric regulating valve 10 is recovered to be in an initial opening state.
This embodiment is responsible for 4 with the steam turbine shaft seal vapour direct introduction steam efflux to get into oxygen-eliminating device 2 and carry out recycle after mixing, avoided the thermal loss of heat transfer process, improved energy utilization. The setting of a plurality of valves is further passed through to this embodiment for steam transport does not influence the normal use of turbine shaft cover vapour. The embodiment has simple structure and is easy to be directly transformed and used.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The steam turbine shaft seal steam recycle device sets up between steam turbine and oxygen-eliminating device, be equipped with shaft seal steam recycling pipe on the steam turbine, be equipped with high temperature steam supply pipe on the oxygen-eliminating device, its characterized in that: the steam jet device comprises a high-temperature steam supply pipe, a steam jet main pipe, a steam jet device, a shaft seal steam extraction pipe and a shaft seal steam reuse pipe, wherein the high-temperature steam supply pipe is connected with the steam jet main pipe, the steam jet main pipe is provided with the steam jet device, the shaft seal steam extraction pipe is arranged between the high-temperature steam supply pipe and the steam jet device on the steam jet main pipe, and the shaft seal steam reuse pipe is connected with the shaft seal steam extraction pipe.
2. The steam turbine shaft seal steam recycling device of claim 1, wherein: and a shaft seal steam supplementing pipe is arranged between the shaft seal steam extraction pipe and the steam ejector on the steam jet main pipe, and a steam supplementing electric regulating valve is arranged on the shaft seal steam supplementing pipe.
3. The steam turbine shaft seal steam recycling device of claim 2, wherein: and the shaft seal steam extraction pipe and the shaft seal steam supplementing pipe are respectively provided with a shaft seal steam sealing valve.
4. The steam turbine shaft seal steam recycling device of claim 1, wherein: and the steam jet main pipe is provided with a jet electric regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022827105.8U CN213928478U (en) | 2020-11-30 | 2020-11-30 | Steam turbine shaft seal steam recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022827105.8U CN213928478U (en) | 2020-11-30 | 2020-11-30 | Steam turbine shaft seal steam recycling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213928478U true CN213928478U (en) | 2021-08-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022827105.8U Active CN213928478U (en) | 2020-11-30 | 2020-11-30 | Steam turbine shaft seal steam recycling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213928478U (en) |
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2020
- 2020-11-30 CN CN202022827105.8U patent/CN213928478U/en active Active
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