CN107035439B - Rear cylinder cooling system of condensing steam turbine - Google Patents
Rear cylinder cooling system of condensing steam turbine Download PDFInfo
- Publication number
- CN107035439B CN107035439B CN201710499356.8A CN201710499356A CN107035439B CN 107035439 B CN107035439 B CN 107035439B CN 201710499356 A CN201710499356 A CN 201710499356A CN 107035439 B CN107035439 B CN 107035439B
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- Prior art keywords
- steam turbine
- valve
- condensing steam
- condenser
- rear cylinder
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
Abstract
The invention belongs to the technical field of steam turbine equipment, and particularly relates to a rear cylinder cooling system of a condensing steam turbine. The cooling system comprises a vacuumizing device, a condenser and a condensate pump, wherein the condenser is connected with the condensate pump through a pipeline, the condensate pump is respectively connected with a spray device and a condensate header through a pipeline and a tee joint, a first check valve, a first stop valve and a regulating valve are arranged on the pipeline of the condensate pump and the spray device, and a second check valve and a second stop valve are arranged on the pipeline of the condensate pump and the condensate header; the condenser is connected with the vacuumizing device through a pipeline, and temperature measuring elements are arranged on the circuits of the condenser and the rear cylinder of the condensing steam turbine; the spray device atomizes the condensed water and then enters a rear cylinder of the condensing steam turbine; the regulating valve is a manual valve or an electric valve. The invention has the advantages of simple structure, small occupied space, low cost, safety and reliability.
Description
Technical field:
the invention belongs to the technical field of steam turbine equipment, and particularly relates to a rear cylinder cooling system of a condensing steam turbine.
The background technology is as follows:
in the operation process of the condensing steam turbine, due to some characteristic conditions (such as long-time air load operation), the temperature of a rear cylinder of the condensing steam turbine can be increased, so that the condensing steam turbine is caused to vibrate greatly, and the machine is stopped. Therefore, the rear cylinders of such condensing turbines must be cooled. The rear cylinder of the condensing steam turbine is cooled, and a set of water spraying and temperature reducing system is mainly introduced at present, but the method has the advantages of complex structure, large required space and high cost. Therefore, it is necessary to design a cooling system for the rear cylinder of a condensing turbine without an external water spray temperature reduction system.
The invention comprises the following steps:
the invention overcomes and improves the defects of the prior art, and provides a cooling system for the rear cylinder of the condensing steam turbine, which realizes the cooling of the rear cylinder of the condensing steam turbine through a regulating valve and a spraying device, utilizes the original condensing system of the condensing steam turbine, realizes the cooling of the rear cylinder of the condensing steam turbine, has a simple structure and saves the cost.
The invention adopts the technical scheme that: the cooling system comprises a vacuumizing device, a condenser and a condensate pump, wherein the condenser is connected with the condensate pump through a pipeline, the condensate pump is respectively connected with a spray device and a condensate header through a pipeline and a tee joint, a first check valve, a first stop valve and a regulating valve are arranged on the pipelines of the condensate pump and the spray device, and a second check valve and a second stop valve are arranged on the pipelines of the condensate pump and the condensate header; the condenser is connected with the vacuumizing device through a pipeline, and a temperature measuring element is arranged on a line of the condenser and a rear cylinder of the condensing steam turbine.
The spray device atomizes the condensed water and then enters the rear cylinder of the condensing steam turbine.
The regulating valve is a manual valve or an electric valve.
The invention has the beneficial effects that: simple structure, small occupied space, low cost, safety, reliability, economy, applicability and easy large-scale popularization and use. According to the cooling system, under the condition that an external water spraying and temperature reducing system is not utilized, one path of condensed water is led through the outlet of the condensed water pump, and enters the rear cylinder of the condensing steam turbine for cooling through the check valve, the stop valve, the regulating valve and the spraying device, and meanwhile, the vacuum degree of the condenser is controlled by controlling the cooling water flow of the vacuumizing device and the condenser, the temperature of the condensed water is regulated, and the rear cylinder of the condensing steam turbine is cooled. Has the advantages of simple structure and convenient use; the flow control is realized by adjusting the opening of the regulating valve, and the valve has the outstanding characteristic of convenient operation; the spray device can atomize the condensed water at the outlet of the condensed water pump, and has simple structure and high safety coefficient.
Description of the drawings:
FIG. 1 is a schematic diagram of a post-cylinder cooling system of a condensing turbine.
The specific embodiment is as follows:
referring to fig. 1, a cooling system for a rear cylinder of a condensing steam turbine comprises a vacuumizing device 4, a condenser 3 and a condensate pump 5, wherein the condenser 3 is connected with the condensate pump 5 through a pipeline, the condensate pump 5 is respectively connected with a spraying device 9 and a condensate header pipe through a pipeline and a tee joint, a first check valve 6, a first stop valve 7 and a regulating valve 8 are arranged on the pipelines of the condensate pump 5 and the spraying device 9, and a second check valve 10 and a second stop valve 11 are arranged on the pipelines of the condensate pump 5 and the condensate header pipe; the condenser 3 is connected with the vacuumizing device 4 through a pipeline, and a temperature measuring element 2 is arranged on a line between the condenser 3 and the rear cylinder 1 of the condensing steam turbine; the spray device 9 atomizes the condensed water and then enters the rear cylinder 1 of the condensing steam turbine; the regulating valve 8 is a manual valve or an electric valve. The cooling system can cool the cylinder 1 after entering the condensing turbine by leading one path of condensed water from the outlet of the condensed water pump 5 and passing through the check valve 6, the stop valve 7, the regulating valve 8 and the spraying device 9 without using an external water spray temperature reducing system, and simultaneously controls the flow of cooling water of the vacuumizing device 4 and the condenser 3, thereby controlling the vacuum degree of the condenser 3, regulating the temperature of the condensed water and cooling the cylinder 1 after the condensing turbine.
According to the system diagram shown in FIG. 1, the construction of a post-cylinder cooling system of the condensing steam turbine is completed. Before the condensing steam turbine operates, firstly, a stop valve 11 is opened, a stop valve 7 and a regulating valve 8 are closed, then a condensate pump 5 and a vacuumizing device 4 are opened, and the system starts to operate; when the temperature measuring element 2 shows that the temperature of the rear cylinder 1 of the condensing steam turbine is high, the stop valve 7 is opened, the opening of the regulating valve 8 is controlled, and the rear cylinder 1 of the condensing steam turbine is cooled; in the cooling process, the vacuum degree of the condenser 3 can be controlled by controlling the cooling water flow of the vacuumizing device 4 and the condenser 3, so that the temperature of the condensed water can be adjusted;
when the condensing steam turbine stops running, the stop valve 7 and the regulating valve 8 are closed first, and then the condensate pump 5, the vacuumizing device 4 and the stop valve 11 are closed.
Claims (3)
1. A condensing steam turbine rear cylinder cooling system is characterized in that: the cooling system comprises a vacuumizing device (4), a condenser (3) and a condensate pump (5), wherein the condenser (3) is connected with the condensate pump (5) through a pipeline, the condensate pump (5) is respectively connected with a spraying device (9) and a condensate header pipe through a pipeline and a tee joint, a first check valve (6), a first stop valve (7) and a regulating valve (8) are arranged on the pipelines of the condensate pump (5) and the spraying device (9), and a second check valve (10) and a second stop valve (11) are arranged on the pipelines of the condensate pump (5) and the condensate header pipe; the condenser (3) is connected with the vacuumizing device (4) through a pipeline, and a temperature measuring element (2) is arranged on a line between the condenser (3) and the rear cylinder (1) of the condensing steam turbine.
2. The condensing steam turbine post-cylinder cooling system of claim 1, wherein: the spray device (9) atomizes the condensed water and then enters the rear cylinder (1) of the condensing steam turbine.
3. The condensing steam turbine post-cylinder cooling system of claim 1, wherein: the regulating valve (8) is a manual valve or an electric valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499356.8A CN107035439B (en) | 2017-06-27 | 2017-06-27 | Rear cylinder cooling system of condensing steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499356.8A CN107035439B (en) | 2017-06-27 | 2017-06-27 | Rear cylinder cooling system of condensing steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107035439A CN107035439A (en) | 2017-08-11 |
| CN107035439B true CN107035439B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710499356.8A Active CN107035439B (en) | 2017-06-27 | 2017-06-27 | Rear cylinder cooling system of condensing steam turbine |
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| CN203702271U (en) * | 2013-12-31 | 2014-07-09 | 山西大唐国际运城发电有限责任公司 | Device for lowering exhaust steam temperature of steam turbine |
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| CN205654386U (en) * | 2016-04-14 | 2016-10-19 | 长安益阳发电有限公司 | Jar cooling system behind turbine unit |
| CN106224020A (en) * | 2016-09-30 | 2016-12-14 | 北京北方三合能源技术有限公司 | A kind of fired power generating unit two-way accumulation of energy fall coal consumption system |
| CN206845236U (en) * | 2017-06-27 | 2018-01-05 | 中国船舶重工集团公司第七�三研究所 | A kind of condensing turbine exhaust casing cooling system |
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| CN107035439A (en) | 2017-08-11 |
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