CN105134307A - Water cooling system for thermal power plant - Google Patents
Water cooling system for thermal power plant Download PDFInfo
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- CN105134307A CN105134307A CN201510603578.0A CN201510603578A CN105134307A CN 105134307 A CN105134307 A CN 105134307A CN 201510603578 A CN201510603578 A CN 201510603578A CN 105134307 A CN105134307 A CN 105134307A
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- cooling
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Abstract
The invention discloses a water cooling system for a thermal power plant. The water cooling system comprises a steam turbine generator unit and a first cooling water pump which is connected with a motor. A water inlet of the first cooling water pump is connected with a first circulating water pipe through a pipeline. A water outlet is connected with a plurality of user devices needing to be cooled through pipelines. Electric isolating valves are arranged on the pipeline of the water inlet end and the pipelines of the water outlet end of the first cooling water pump respectively. The user devices are connected with a second circulating water pipe which is connected with the first circulating water pipe through a pipeline. Isolating valves are arranged on the pipelines of the front end and the rear end of each user device respectively. A second cooling water pump is arranged between the first circulating water pipe and the user devices. The second cooling water pump is connected with an output shaft of the steam turbine generator unit. Electric isolating valves are arranged on a pipeline of the water inlet end and pipelines of the water outlet end of the second cooling water pump respectively. As a steam turbine is adopted for driving, operation is reliable, operation economy is good, safety is high, use efficiency of the system is improved, space is saved, and the water cooling system is convenient to assemble and disassemble.
Description
Technical field
The present invention relates to thermal power generating equipment technical field, relating to is a kind of thermal power plant cooling water system utilizing Steam Turbine Driven cooling water system to run.
Background technique
The each rotating machinery in thermal power plant can produce heat when running, and for ensureing device security reliable operation, needs to adopt cooling water to cool running device.Usually the cooling water system arranging a set of motoring in prior art provides cooling water source to each equipment user; For ensureing the stability that cooling water system runs and Security, a set of cooling water system need configure the cooling waterpump group equipment of 100% capacity of two cover motoring, and an operation one is for subsequent use.The defect that the cooling system of prior art exists is, because cooling water system random group runs without interruption, adopts motoring to need to expend more station service; And consider the Security of unit operation, need the standby equipment of configuration 100% capacity, easily cause the idleness of equipment and increase power plant operation and maintenance workload.
Summary of the invention
Object of the present invention is exactly the problems referred to above existed for solving prior art, provides a kind of thermal power plant water cooling system; The present invention adopts Steam Turbine Driven, and power source is stable, not by system grid fluctuations affect, reliable, avoids the equipment caused because of electrical equipment malfunction reason to stop transport; Reduce power consumption, reduce operating cost, improve performance driving economy, Security is high, consumer is few, operation is convenient, is convenient to equipment repair and maintenance, improves system utilization efficiency, save space, and be easy for installation and removal, the present invention reaches security of system, reliable operation, reduces the object of power consumption.
The technological scheme of technical solution problem of the present invention is:
A kind of thermal power plant water cooling system, comprise Turbo-generator Set, cooling waterpump one, cooling waterpump one is connected with motor, described cooling waterpump one water intake is connected with circulating pipe one by pipeline, water outlet is connected with needing the some customer equipmenies cooled by pipeline, the water intake of cooling waterpump one and the pipeline of water outlet end are respectively equipped with motor-operated isolation valve, customer equipment is connected with circulating pipe two, circulating pipe two-way piping is connected with circulating pipe one, the pipeline of customer equipment rear and front end is respectively equipped with separating valve, cooling waterpump two is provided with between circulating pipe one and customer equipment, cooling waterpump two and cooling waterpump one are for being arranged in parallel, described cooling waterpump two is connected with the output shaft of Turbo-generator Set, the pipeline of cooling waterpump two water intake and water outlet end is respectively equipped with motor-operated isolation valve, the pipeline of waterexit end is provided with flowmeter and pressure gauge.
The pipeline three in parallel with cooling waterpump two is provided with between on the pipeline of circulating pipe one with cooling waterpump two water outlet end, pipeline is provided with recirculation modulating valve, and the link position of pipeline three and cooling waterpump two water outlet end pipeline is between motor-operated isolation valve and cooling waterpump two.
The axial extension in front end of described Turbo-generator Set stretches out predetermined length and forms connecting end, and described connecting end adopts screw-thread fit to be connected with coupling one end, and the coupling the other end is connected with the power input shaft of cooling waterpump two.
Described cooling waterpump one, cooling waterpump two adopt the horizontal centrifugal pump with the 3000rpm of turbine LP rotors rotational speed matches.
The flow of described recirculation modulating valve is 30% of cooling waterpump rated flow, when steam turbine generator unit start or the shutdown stage, also do not reach rated speed 3000rpm time, adjust the aperture of recirculation modulating valve gradually, set up the cooling water medium self-circulation system of cooling waterpump; When recirculating mass reaches 30% of rated flow, open cooling exit of pump motor-operated isolation valve and supply water to system user, close recirculation modulating valve simultaneously.
Beneficial effect of the present invention:
1. the present invention is reliable, and owing to adopting Steam Turbine Driven, power source is stable, not by system grid fluctuations affect, avoids the equipment caused because of electrical equipment, power supply failure cause to stop transport.
2. improve performance driving economy.Owing to driving power to adopt steam turbine, reduce power consumption, reduce operating cost.
3. Security is high, because system layout electrical equipment is few, decreases the dangerous matter sources that electric shock accidents occurs.
4. consumer is few, and operation is convenient, is convenient to equipment repair and maintenance, reduces the workload of equipment operation and conventional maintenance, improves system utilization efficiency.
5. the axial extension in the front end of Turbo-generator Set forms connecting end, connecting end adopts screw-thread fit to be connected with coupling one end, the coupling the other end is connected with the power input shaft of cooling waterpump two, Steam Turbine Driven cooling waterpump adopts with steam turbine coaxially arranged, improve the utilization ratio in steam turbine region, need not bamboo product layout area separately, save space, and be easy for installation and removal.
6. cooling waterpump adopts the horizontal centrifugal pump with the 3000rpm of turbine LP rotors rotational speed matches, when Turbo-generator Set starts, shuts down the stage, can the break-make of controlled circulation cooling water easily, and ensure that cooling water medium is normally carried.
7. by cooling waterpump outlet, directly extraction one road recirculating line and recirculation modulating valve are connected to entrance circulating pipe one; recirculation regulating valve flow is chosen as 30% of cooling waterpump rated flow; when steam turbine generator unit starts or the shutdown stage does not also reach rated speed 3000rpm; adjust the aperture of recirculation modulating valve gradually; set up the self-loopa of cooling water medium, prevent cooling waterpump generation cavitation.When recirculating mass exceedes 30% of rated flow; then open cooling exit of pump motor-operated isolation valve to supply water to system user; close recirculating mass valve 204 simultaneously; when after halt turbines or before starting; driving power cannot be provided for cooling waterpump; now; start and provide cooling water by the cooling waterpump for subsequent use of motoring to system user; the horizontal centrifugal pump of Steam Turbine Driven cooling waterpump same model, rotating speed selected by cooling waterpump for subsequent use; ensure reliability, the continuity of system cloud gray model, ensure security of system stability.
Accompanying drawing explanation
Fig. 1 is the structural representation of invention.
Embodiment
In order to understand the present invention better, explain embodiments of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of thermal power plant water cooling system, comprises Turbo-generator Set 101, cooling waterpump 2 201, motor-operated isolation valve 202, motor-operated isolation valve 203, recirculation modulating valve 204, flowmeter 205, cooling waterpump 1, motor-operated isolation valve 302, motor-operated isolation valve 303, separating valve 401,402,403,404,405,406.Cooling waterpump 1 is connected with motor; Described cooling waterpump 1 water intake is connected with circulating pipe 1 by pipeline, water outlet is connected with needing the some customer equipmenies cooled by pipeline, the water intake of cooling waterpump 1 and the pipeline of water outlet end are respectively equipped with motor-operated isolation valve 302,303, customer equipment is connected with circulating pipe 22, circulating pipe 22 is connected with circulating pipe 1 by pipeline, and the pipeline of customer equipment rear and front end is respectively equipped with separating valve 401,402,403,404,405,406 etc.Cooling waterpump 2 201 is provided with between circulating pipe one and customer equipment, cooling waterpump 2 201 and cooling waterpump 1 are for being arranged in parallel, described cooling waterpump 2 201 is connected with the output shaft of Turbo-generator Set 101, the pipeline of cooling waterpump 2 201 water intake and water outlet end is respectively equipped with motor-operated isolation valve 202,203, the pipeline of waterexit end is provided with flowmeter 205 and pressure gauge.
The pipeline three in parallel with cooling waterpump 2 201 is provided with between on the pipeline of circulating pipe 1 with cooling waterpump 2 201 water outlet end, pipeline 3 is provided with recirculation modulating valve 204, and the link position of pipeline three and cooling waterpump 2 201 water outlet end pipeline is between motor-operated isolation valve 203 and cooling waterpump 2 201.
The axial extension in front end of described Turbo-generator Set 101 stretches out predetermined length and forms connecting end, and described connecting end adopts screw-thread fit to be connected with coupling one end, and the coupling the other end is connected with the power input shaft of cooling waterpump 2 201.
Described cooling waterpump 1, cooling waterpump 2 201 adopt the horizontal centrifugal pump with the 3000rpm of turbine LP rotors 101 rotational speed matches.
The flow of described recirculation modulating valve 204 is 30% of cooling waterpump 201 rated flow, when steam turbine generator unit 101 start or the shutdown stage, also do not reach rated speed 3000rpm time, adjust the aperture of recirculation modulating valve 204 gradually, set up the cooling water medium self-circulation system of cooling waterpump; When recirculating mass exceedes 30% of rated flow, open cooling waterpump 201 and export motor-operated isolation valve 203 to system user water supply, close recirculating mass valve 204 simultaneously.
The connecting end that the present invention goes out one section in Turbo-generator Set 101 steam turbine front end shaft extension is connected with coupling by screw-thread fit, the coupling the other end is directly connected with the power input shaft of cooling waterpump 201, cooling waterpump 201 adopts the horizontal centrifugal pump with the 3000rpm of turbine LP rotors 101 rotational speed matches, the entrance of cooling waterpump 201 and outlet configuration motor-operated isolation valve 202,203, when Turbo-generator Set 101 start, stop phase, can the break-make of controlled circulation cooling water easily, ensure that cooling water medium is normally carried.
Entrance circulating pipe 1 is connected to by exporting directly extraction one road recirculating line and recirculation modulating valve 204 at cooling waterpump 201; recirculation modulating valve 204 flow is chosen as 30% of cooling waterpump 201 rated flow; when steam turbine generator unit 101 starts or the shutdown stage does not also reach rated speed 3000rpm; adjust the aperture of recirculation modulating valve 204 gradually; set up the self-loopa of cooling water medium, prevent cooling waterpump 201 from cavitation occurring.When recirculating mass reaches 30% of rated flow, then open cooling waterpump 201 and export motor-operated isolation valve 203 to system user water supply, close recirculation modulating valve 204 simultaneously.
When after halt turbines or before starting; driving power cannot be provided for cooling waterpump 201; now; start and provide cooling water by the cooling waterpump for subsequent use 301 of motoring to system user; the horizontal centrifugal pump of Steam Turbine Driven cooling waterpump 201 same model, rotating speed selected by cooling waterpump 301 for subsequent use; ensure reliability, the continuity of system cloud gray model, ensure security of system stability.Because halt turbines or initial start stage rotary speed unstabilization are determined, for ensureing security of system reliable operation, two kinds of measures are taked to deal with respectively: first, design configurations one tunnel, Steam Turbine Driven cooling waterpump outlet port recirculating system, when steam turbine initial start stage, when rotating speed is also unstable, ensure cooling waterpump safety by opening recirculating line modulating valve 204; When after stabilization of speed, then open cooling waterpump 201 outlet valve 203 and provide cooling water to system user; The second, when after halt turbines or start before, cannot provide driving power for cooling waterpump 201, now, starting cooling waterpump 301 for subsequent use provides cooling water to system user, ensure security of system, reliable operation.
Under normal operation mode, only need the Steam Turbine Driven cooling waterpump 201 that puts into operation, only after halt turbines, start time and the maintenance stage just drop into cooling waterpump 301 for subsequent use.The present invention has following advantage:
1, this system adopts Steam Turbine Driven to replace conventional motors to drive cooling waterpump.
2, this system exports directly extraction one road recirculating line and recirculation modulating valve 204 at cooling waterpump 201 and is connected to entrance circulating pipe 1;
3, recirculation modulating valve 204 flow is chosen as 30% of cooling waterpump 201 rated flow; when steam turbine generator unit 101 starts or the shutdown stage does not also reach rated speed 3000rpm; adjust the aperture of recirculation modulating valve 204 gradually; set up the self-loopa of cooling water medium, prevent cooling waterpump 201 from cavitation occurring.
By reference to the accompanying drawings the embodiment of invention is described although above-mentioned; but not limiting the scope of the invention; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (5)
1. a thermal power plant water cooling system, comprise Turbo-generator Set, cooling waterpump one, it is characterized in that, cooling waterpump one is connected with motor, described cooling waterpump one water intake is connected with circulating pipe one by pipeline, water outlet is connected with needing the some customer equipmenies cooled by pipeline, the water intake of cooling waterpump one and the pipeline of water outlet end are respectively equipped with motor-operated isolation valve, customer equipment is connected with circulating pipe two, circulating pipe two-way piping is connected with circulating pipe one, the pipeline of customer equipment rear and front end is respectively equipped with separating valve, cooling waterpump two is provided with between circulating pipe one and customer equipment, cooling waterpump two and cooling waterpump one are for being arranged in parallel, described cooling waterpump two is connected with the output shaft of Turbo-generator Set, the pipeline of cooling waterpump two water intake and water outlet end is respectively equipped with motor-operated isolation valve, the pipeline of waterexit end is provided with flowmeter and pressure gauge.
2. thermal power plant as claimed in claim 1 water cooling system, it is characterized in that, described circulating pipe one with on the pipeline of cooling waterpump two water outlet end between be provided with the pipeline three in parallel with cooling waterpump two, pipeline is provided with recirculation modulating valve, and the link position of pipeline three and cooling waterpump two water outlet end pipeline is between motor-operated isolation valve and cooling waterpump two.
3. thermal power plant as claimed in claim 1 water cooling system, it is characterized in that, the axial extension in front end of described Turbo-generator Set stretches out predetermined length and forms connecting end, described connecting end adopts screw-thread fit to be connected with coupling one end, and the coupling the other end is connected with the power input shaft of cooling waterpump two.
4. thermal power plant as claimed in claim 1 water cooling system, is characterized in that, described cooling waterpump one, cooling waterpump two adopt the horizontal centrifugal pump with the 3000rpm of turbine LP rotors rotational speed matches.
5. thermal power plant as claimed in claim 2 water cooling system, it is characterized in that, the flow of described recirculation modulating valve is 30% of cooling waterpump rated flow, when steam turbine generator unit start or the shutdown stage, also do not reach rated speed 3000rpm time, adjust the aperture of recirculation modulating valve gradually, set up the cooling water medium self-circulation system of cooling waterpump; When recirculating mass reaches 30% of rated flow, open cooling exit of pump motor-operated isolation valve and supply water to system user, close recirculation modulating valve simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510603578.0A CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510603578.0A CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
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| CN105134307A true CN105134307A (en) | 2015-12-09 |
| CN105134307B CN105134307B (en) | 2017-01-18 |
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| CN201510603578.0A Active CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247739A (en) * | 2016-09-28 | 2016-12-21 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's industrial cooling circulating water system and on off control method thereof |
Citations (4)
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| CN102720551A (en) * | 2012-07-02 | 2012-10-10 | 上海汽轮机厂有限公司 | Control method for steam thermal system with dual-machine backheating steam extraction |
| CN103397919A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Feed pump system driven by straight condensing small turbine and speed-governed by power frequency generator and method |
| CN104832223A (en) * | 2015-06-02 | 2015-08-12 | 济南达能动力技术有限责任公司 | Steam turbine with power-losing self-start emergency oil supply system and work method of steam turbine |
| CN204941619U (en) * | 2015-09-21 | 2016-01-06 | 山东电力建设第一工程公司 | Thermal power plant water cooling system |
-
2015
- 2015-09-21 CN CN201510603578.0A patent/CN105134307B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720551A (en) * | 2012-07-02 | 2012-10-10 | 上海汽轮机厂有限公司 | Control method for steam thermal system with dual-machine backheating steam extraction |
| CN103397919A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Feed pump system driven by straight condensing small turbine and speed-governed by power frequency generator and method |
| CN104832223A (en) * | 2015-06-02 | 2015-08-12 | 济南达能动力技术有限责任公司 | Steam turbine with power-losing self-start emergency oil supply system and work method of steam turbine |
| CN204941619U (en) * | 2015-09-21 | 2016-01-06 | 山东电力建设第一工程公司 | Thermal power plant water cooling system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247739A (en) * | 2016-09-28 | 2016-12-21 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's industrial cooling circulating water system and on off control method thereof |
| CN106247739B (en) * | 2016-09-28 | 2019-01-29 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's industrial cooling circulating water system and its start-up and shut-down control method |
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| CN105134307B (en) | 2017-01-18 |
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Address after: No.6 building, zone 2, Hanyu financial and business center, hi tech Zone, Jinan City, Shandong Province Patentee after: SEPCO1 ELECTRIC POWER CONSTRUCTION CORPORATION Co.,Ltd. Address before: 250131 No. 244 Industrial North Road, Jinan City, Shandong Province Patentee before: SEPCO1 ELECTRIC POWER CONSTRUCTION Corp. |
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