CN214196424U - Cylinder cutting operation system without cooling steam bypass - Google Patents
Cylinder cutting operation system without cooling steam bypass Download PDFInfo
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- CN214196424U CN214196424U CN202022439828.0U CN202022439828U CN214196424U CN 214196424 U CN214196424 U CN 214196424U CN 202022439828 U CN202022439828 U CN 202022439828U CN 214196424 U CN214196424 U CN 214196424U
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Abstract
The utility model discloses a do not have jar operating system that cuts of cooling steam bypass especially relates to and cuts jar operating system technical field, including steam turbine intermediate pressure jar and steam turbine low pressure jar, steam turbine low pressure jar is located steam turbine intermediate pressure jar one side, through the pipe connection between steam turbine intermediate pressure jar and the steam turbine low pressure jar. This jar operating system that cuts of no cooling steam bypass, it is spacing to close through the minimum of canceling low pressure jar intercommunication valve, can realize that the unit does not have low pressure jar cooling steam bypass and cuts jar operation, solve the cooling steam bypass and arrange the problem, can reduce simultaneously and reform transform initial investment, this system compares under the same jar transformation of cutting, reduce low pressure jar cooling steam bypass, need not to lift high low pressure jar intercommunication valve height in low pressure simultaneously, and to typical 300MW subcritical double low pressure jar unit, can promote unit heat supply steam extraction ability, the problem that most power plants do not have conventional cooling steam bypass to arrange the position or arrange comparatively difficult at present has been solved.
Description
Technical Field
The utility model relates to a cut jar operating system technical field, especially relate to a do not have jar operating system that cuts of cooling steam bypass.
Background
At present, China is advancing the construction pace of new energy power production, coal-fired generating sets undertake heavier and heavier peak regulation tasks, and most of the generating sets need to realize the reduction of the peak regulation function in the heat supply period. Due to the limitations of design, production process and the like, the blowing problem of the low-pressure cylinder under small volume flow affects the safe operation of a unit, and most communication valves of medium and low-pressure cylinders of a power plant adopt the minimum limiting operation. Most power plants currently have no conventional cooling steam bypass arrangement location or arrangement difficult.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a jar operating system is cut of no cooling steam bypass, solved most power plants at present and do not have conventional cooling steam bypass and arrange the position or arrange comparatively difficult problem.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a no cooling steam bypass cut jar operating system, includes turbine intermediate pressure jar and turbine low pressure jar, turbine low pressure jar is located turbine intermediate pressure jar one side, pass through the pipe connection between turbine intermediate pressure jar and the turbine low pressure jar, turbine intermediate pressure jar opposite side is equipped with the heat supply network heater, pass through the pipe connection between turbine intermediate pressure jar and the heat supply network heater, heat supply network heater one side is equipped with the heat supply network drainage pump, pass through the pipe connection between heat supply network heater and the heat supply network drainage pump, heat supply network drainage pump one side is equipped with the condenser heat-well, pass through the pipe connection between heat supply network drainage pump and the condenser heat-well.
Preferably, a pipeline between the turbine intermediate pressure cylinder and the turbine low pressure cylinder is provided with an intermediate pressure cylinder communicating valve.
Preferably, a heating steam extraction regulating valve is arranged on a pipeline between the steam turbine intermediate pressure cylinder and the heat supply network heater.
Preferably, the low-pressure cylinder of the steam turbine is connected with the hot well of the condenser through a pipeline.
Compared with the prior art, the utility model discloses the beneficial effect who realizes: this kind of no cooling steam bypass cut jar operating system, it is spacing to close through the minimum of canceling low pressure jar intercommunication valve, can realize that the unit does not have low pressure jar cooling steam bypass and cuts jar operation, solve the cooling steam bypass and arrange the problem, can reduce simultaneously and reform transform initial investment, this system compares the same and cuts under the jar transformation, reduce low pressure jar cooling steam bypass, need not to lift high plateau low pressure jar intercommunication valve height simultaneously, and to the subcritical two low pressure jar units of typical 300MW, can promote unit heat supply steam extraction ability.
Drawings
Fig. 1 is an overall schematic view of the present invention.
In the figure: 1-a turbine intermediate pressure cylinder, 2-a medium and low pressure cylinder communicating valve, 3-a turbine low pressure cylinder, 4-a heating steam extraction regulating valve, 5-a heat supply network heater, 6-a heat supply network drain pump and 7-a condenser heat well.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in FIG. 1, a cylinder cutting operation system without cooling steam bypass comprises a steam turbine intermediate pressure cylinder 1 and a steam turbine low pressure cylinder 3, wherein the steam turbine low pressure cylinder 3 is located on one side of the steam turbine intermediate pressure cylinder 1, the steam turbine intermediate pressure cylinder 1 is connected with the steam turbine low pressure cylinder 3 through a pipeline, a heat supply network heater 5 is arranged on the other side of the steam turbine intermediate pressure cylinder 1, the steam turbine intermediate pressure cylinder 1 is connected with the heat supply network heater 5 through a pipeline, a heat supply network drain pump 6 is arranged on one side of the heat supply network heater 5, the heat supply network heater 5 is connected with the heat supply network drain pump 6 through a pipeline, a condenser heat well 7 is arranged on one side of the heat supply network drain pump 6, the heat supply network drain pump 6 is connected with the condenser heat well 7 through a pipeline, a medium and low pressure cylinder communicating valve 2 is installed on the pipeline between the steam turbine intermediate pressure cylinder 1 and the steam turbine low pressure cylinder 3, and a heating steam extraction regulating valve 4 is, the low-pressure turbine cylinder 3 is connected with the condenser hot well 7 through a pipeline, and under the pure condensation working condition, the exhausted steam in the medium-pressure turbine cylinder 1 is regulated jointly by the medium-low pressure cylinder communicating valve 2 and the heating steam extraction regulating valve 4 and then completely enters the low-pressure turbine cylinder 3 to continuously generate power and do work;
under the working condition of conventional condensing heat supply, after the exhaust steam in the turbine intermediate pressure cylinder 1 is jointly regulated by the medium and low pressure cylinder communicating valve 2 and the heating steam extraction regulating valve 4, part of the steam enters the turbine low pressure cylinder 3 to continuously generate power and do work, part of the steam enters the heat supply network heater 5 to exchange heat with the circulating water of the heat supply network, and the cooling water after heat exchange enters the condenser heat well 7 through the heat supply network drain pump 6 to complete working medium circulation;
under the working condition of cylinder cutting and heat supply, by canceling the minimum closing limit of the medium and low pressure cylinder communicating valve 2, after the exhaust steam in the turbine medium pressure cylinder 1 is jointly regulated by the medium and low pressure cylinder communicating valve 2 and the heating steam extraction regulating valve 4, only a small part of steam enters the turbine low pressure cylinder 3 to cool the low pressure rotor heated by blast friction, the safe operation of a unit is ensured, most of steam enters the heat supply network heater 5 to exchange heat for heat supply network circulating water, and the cooling water after heat exchange enters the condenser heat well 7 through the heat supply network drain pump 6 to complete working medium circulation;
in conclusion, the minimum closing limit of the low-pressure cylinder communicating valve 2 is cancelled, the operation of the unit without a low-pressure cylinder cooling steam bypass can be realized, the cooling steam bypass arrangement problem is solved, the initial reconstruction investment can be reduced, the low-pressure cylinder cooling steam bypass is reduced under the same cylinder cutting reconstruction condition compared with the system, the height of the high-pressure low-pressure cylinder communicating valve 2 is not required to be raised, and the heat supply and steam extraction capacity of the unit can be improved for a typical 300MW subcritical double-low-pressure cylinder unit, so that the system can realize the partial thermoelectric decoupling function of the unit under the condition of heat supply in winter, the initial engineering investment is reduced, and the low-pressure cylinder reconstruction problem limited by the site-based problem of part of the power plant is solved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a no cooling steam bypass cut jar operating system, includes steam turbine intermediate pressure cylinder (1) and steam turbine low pressure cylinder (3), steam turbine low pressure cylinder (3) are located steam turbine intermediate pressure cylinder (1) one side, its characterized in that:
through the pipe connection between steam turbine intermediate pressure cylinder (1) and the steam turbine low pressure cylinder (3), steam turbine intermediate pressure cylinder (1) opposite side is equipped with heat supply network heater (5), through the pipe connection between steam turbine intermediate pressure cylinder (1) and heat supply network heater (5), heat supply network heater (5) one side is equipped with heat supply network drainage pump (6), through the pipe connection between heat supply network heater (5) and heat supply network drainage pump (6), heat supply network drainage pump (6) one side is equipped with condenser heat-well (7), through the pipe connection between heat supply network drainage pump (6) and condenser heat-well (7).
2. The cylinder-cutting operation system without cooling steam bypass according to claim 1, wherein: and a pipeline between the turbine intermediate pressure cylinder (1) and the turbine low pressure cylinder (3) is provided with an intermediate pressure cylinder communicating valve (2).
3. The cylinder-cutting operation system without cooling steam bypass according to claim 1, wherein: and a heating steam extraction regulating valve (4) is arranged on a pipeline between the steam turbine intermediate pressure cylinder (1) and the heat supply network heater (5).
4. The cylinder-cutting operation system without cooling steam bypass according to claim 1, wherein: and the steam turbine low-pressure cylinder (3) is connected with the condenser hot well (7) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022439828.0U CN214196424U (en) | 2020-10-28 | 2020-10-28 | Cylinder cutting operation system without cooling steam bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022439828.0U CN214196424U (en) | 2020-10-28 | 2020-10-28 | Cylinder cutting operation system without cooling steam bypass |
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| Publication Number | Publication Date |
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| CN214196424U true CN214196424U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022439828.0U Active CN214196424U (en) | 2020-10-28 | 2020-10-28 | Cylinder cutting operation system without cooling steam bypass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
-
2020
- 2020-10-28 CN CN202022439828.0U patent/CN214196424U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
| CN114704340B (en) * | 2022-05-06 | 2023-12-08 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure cylinder zero-output steam turbine unit regenerative system and operation method |
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