CN105134307B - Water cooling system for thermal power plant - Google Patents
Water cooling system for thermal power plant Download PDFInfo
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- CN105134307B CN105134307B CN201510603578.0A CN201510603578A CN105134307B CN 105134307 B CN105134307 B CN 105134307B CN 201510603578 A CN201510603578 A CN 201510603578A CN 105134307 B CN105134307 B CN 105134307B
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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, being related to is a kind of fire being run using Steam Turbine Driven cooling water system
Power power-plant cooling water system.
Background technology
The each rotating machinery in thermal power plant can produce heat when running, and for ensureing equipment safety reliability service, needs to adopt
Cooling water cools down to running device.The cooling water system of a set of motor-driven is generally set in prior art to each equipment
User provides cooling water source；For ensureing stability and the security of cooling water system operation, a set of cooling water system need to configure two
The cooling water pump group equipment of 100% capacity of set motor-driven, an operation one is standby.The cooling system of prior art is deposited
Defect be, due to cooling water system random groups run without interruption, need to expend more station service using motor-driven；
And the security of consideration unit operation, need to configure the stand-by equipment of 100% capacity, easily cause the idleness of equipment and increase power plant
Operation maintenance workload.
Content of the invention
The purpose of the present invention is exactly for solving the problems referred to above that prior art exists, providing a kind of thermal power plant water cooling
System；The present invention adopts Steam Turbine Driven, and power source is stable, is not subject to system grid fluctuations affect, reliable, it is to avoid because
The equipment that electrical equipment malfunction reason causes is stopped transport；Reduce power consumption, reduce operating cost, improve performance driving economy, safety
Property high, electrical equipment is few, runs easy to operate, is easy to equipment repair and maintenance, improves system service efficiency, save space, and
It is easy for installation and removal, the present invention reaches the safe and reliable operation of system, reduce the purpose of power consumption.
The technical scheme that the present invention solves technical problem is:
A kind of thermal power plant water cooling system, including Turbo-generator Set, cooling water pump one, cooling water pump one with electronic
Machine connects；Described cooling water pump one water inlet is connected with circulating water pipe one by pipeline, and delivery port passes through pipeline and needs to cool down
Some user equipmenies connect, the water inlet of cooling water pump one and the pipeline of water outlet end are respectively equipped with motor-operated isolation valve, use
Family equipment is connected with circulating water pipe two, and circulating water pipe two-way piping is connected with circulating water pipe one, in user equipment rear and front end
Pipeline on be respectively equipped with isolating valve, be provided with cooling water pump two between circulating water pipe one and user equipment, cooling water pump two with
Cooling water pump one is to be arranged in parallel, and described cooling water pump two is connected with the output shaft of Turbo-generator Set, enters in cooling water pump two
It is respectively equipped with motor-operated isolation valve on the mouth of a river and the pipeline of water outlet end, flowmeter and pressure gauge are provided with the pipeline of water side.
Circulating water pipe one with the pipeline of cooling water pump two water outlet end between be provided with the pipe in parallel with cooling water pump two
Road three, is provided with recycling regulating valve on pipeline, and pipeline three is located at electricity with the link position of cooling water pump two water outlet end pipeline
Between dynamic isolating valve and cooling water pump two.
The front end axle of described Turbo-generator Set stretches out and stretches out predetermined length formation connection end, and described connection end adopts
Screw thread cooperation is connected with shaft coupling one end, and the shaft coupling other end is connected with the power input shaft of cooling water pump two.
Described cooling water pump one, cooling water pump two are using sleeping with the 3000rpm of turbine LP rotors rotational speed matches
Formula centrifugal water pump.
The described flow recycling regulating valve is the 30% of cooling water pump metered flow, when steam turbine generator unit starting or
The shutdown stage, when being also not up to rated speed 3000rpm, gradually adjustment recycles the aperture of regulating valve it is established that cooling water pump
Cooling aqueous medium self-circulation system；When recirculating mass reaches the 30% of metered flow, open cooling water pump outlet electronic
Isolating valve supplies water to system user, simultaneously closes off recycling regulating valve.
Beneficial effects of the present invention:
1. the present invention is reliable, and due to adopting Steam Turbine Driven, power source is stable, is not subject to system power network fluctuation shadow
Ring, it is to avoid because the equipment that electrical equipment, power supply failure cause cause is stopped transport.
2. improve performance driving economy.Due to driving power to adopt steam turbine, reduce power consumption, reduce operating cost.
3. safe, because system configuration electrical equipment is few, decrease the dangerous matter sources of electric shock accidents generation.
4. electrical equipment is few, runs easy to operate, is easy to equipment repair and maintenance, reduces equipment and runs operation and conventional maintenance
Workload, improve system service efficiency.
5. the front end axle of Turbo-generator Set stretch out formation connection end, connection end adopt screw thread cooperation with shaft coupling one
End connects, and the shaft coupling other end is connected with the power input shaft of cooling water pump two, and Steam Turbine Driven cooling water pump adopts and steamer
Machine is coaxially arranged, improves the utilization rate in steam turbine region, without independent redesign layout area, save space, and convenient peace
Assembly and disassembly.
6. cooling water pump, using the horizontal centrifugal pump with the 3000rpm of turbine LP rotors rotational speed matches, works as vapour
Turbine generator group starts, shuts down the stage, can easily control the break-make of recirculated cooling water it is ensured that cooling aqueous medium is normally defeated
Send.
7. pass through to directly lead out a road recirculating line in cooling water pump outlet and recycling regulating valve is connected to entrance circulation
Water pipe one, recycles regulating valve flow and is chosen as the 30% of cooling water pump metered flow, when steam turbine generator unit starting or stop
When the machine stage is also not up to rated speed 3000rpm, gradually adjustment recycles the aperture of regulating valve it is established that cooling down aqueous medium certainly
Circulation, prevents cooling water pump from cavitation occurring.When recirculating mass exceedes the 30% of metered flow, then open cooling water pump outlet
Motor-operated isolation valve to system user supply water, simultaneously close off recirculating mass valve 204, after halt turbines or start before it is impossible to
There is provided for cooling water pump and drive power, now, start and provide cooling from the standby cooling water pump of motor-driven to system user
Water, standby cooling water pump select Steam Turbine Driven cooling water pump same model, rotating speed centrifugal pump of horizontal axis it is ensured that system operation can
By property, continuity it is ensured that system security and stability.
Brief description
Fig. 1 is the structural representation of invention.
Specific embodiment
For a better understanding of the present invention, embodiments of the present invention are explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of thermal power plant water cooling system, including Turbo-generator Set 101, cooling water pump 2 201,
Motor-operated isolation valve 202, motor-operated isolation valve 203, recycle regulating valve 204, flowmeter 205, cooling water pump 1, electronic isolation
Valve 302, motor-operated isolation valve 303, isolating valve 401,402,403,404,405,406.Cooling water pump 1 is connected with motor；
Described cooling water pump 1 water inlet is connected with circulating water pipe 1 by pipeline, if delivery port passes through pipeline and needs cooling
Dry user equipment connects, the water inlet of cooling water pump 1 and the pipeline of water outlet end are respectively equipped with motor-operated isolation valve 302,
303, user equipment is connected with circulating water pipe 22, and circulating water pipe 22 is connected with circulating water pipe 1, in user equipment by pipeline
Isolating valve 401,402,403,404,405,406 etc. is respectively equipped with the pipeline of rear and front end.Set with user in circulating water pipe one
It is provided with cooling water pump 2 201, cooling water pump 2 201 and cooling water pump 1 are to be arranged in parallel, described cooling water pump two between standby
201 are connected with the output shaft of Turbo-generator Set 101, on the pipeline with water outlet end for cooling water pump 2 201 water inlet respectively
It is provided with motor-operated isolation valve 202,203, flowmeter 205 and pressure gauge are provided with the pipeline of water side.
It is provided with cooling water pump 2 201 simultaneously between on the pipeline of circulating water pipe 1 and cooling water pump 2 201 water outlet end
The pipeline three of connection, is provided with recycling regulating valve 204, the company of pipeline three and cooling water pump 2 201 water outlet end pipeline on pipeline 3
Connect position to be located between motor-operated isolation valve 203 and cooling water pump 2 201.
The front end axle of described Turbo-generator Set 101 stretches out and stretches out predetermined length formation connection end, described connection end
It is connected with shaft coupling one end using screw thread cooperation, the shaft coupling other end is connected with the power input shaft of cooling water pump 2 201.
Described cooling water pump 1, cooling water pump 2 201 adopt and turbine LP rotors 101 rotational speed matches
The horizontal centrifugal pump of 3000rpm.
The described flow recycling regulating valve 204 is the 30% of cooling water pump 201 metered flow, when steam turbine generator unit
101 start or shut down the stage, also be not up to rated speed 3000rpm when, gradually adjustment recycle regulating valve 204 aperture, build
Erect the cooling aqueous medium self-circulation system of cooling water pump；When recirculating mass exceedes the 30% of metered flow, open cooling
Water pump 201 outlet motor-operated isolation valve 203 supplies water to system user, simultaneously closes off recirculating mass valve 204.
The connection end that the present invention goes out one section in Turbo-generator Set 101 steam turbine front end shaft extension is coordinated by screw thread and shaft coupling
Device connects, and the shaft coupling other end is directly connected with the power input shaft of cooling water pump 201, and cooling water pump 201 adopts and steam turbine
The horizontal centrifugal pump of the 3000rpm of generating set 101 rotational speed matches, the entrance of cooling water pump 201 and outlet configuration are electronic
Isolating valve 202,203, starts when Turbo-generator Set 101, stop phase, can easily control the break-make of recirculated cooling water,
Ensure that cooling aqueous medium normally conveys.
It is connected to entrance by exporting to directly lead out a road recirculating line and recycle regulating valve 204 in cooling water pump 201
Circulating water pipe 1, recycles regulating valve 204 flow and is chosen as the 30% of cooling water pump 201 metered flow, when steam turbine generator machine
When group 101 starts or the shutdown stage is also not up to rated speed 3000rpm, gradually adjustment recycles the aperture of regulating valve 204, builds
Erect cooling aqueous medium self-loopa, prevent cooling water pump 201 from cavitation occurring.When recirculating mass reaches the 30% of metered flow
When, then open cooling water pump 201 outlet motor-operated isolation valve 203 and supply water to system user, simultaneously close off recycling regulating valve 204.
Drive power it is impossible to provide for cooling water pump 201 after halt turbines or before starting, now, start by electronic
The standby cooling water pump 301 that machine drives provides cooling water to system user, and standby cooling water pump 301 selects Steam Turbine Driven to cool down
Water pump 201 same model, the centrifugal pump of horizontal axis of rotating speed are it is ensured that the reliability of system operation, continuity are it is ensured that system safety and stability
Property.Because halt turbines or initial start stage rotary speed unstabilization are fixed, for ensureing system safe and reliable operation, take two kinds of measures respectively
To tackle: first, Steam Turbine Driven cooling water pump exit design configurations one tunnel recirculating system, when steam turbine initial start stage,
When rotating speed is also unstable, ensure cooling water pump safety by opening recirculating line regulating valve 204；After stabilization of speed, then
Opening cooling water pump 201 outlet valve 203 provides cooling water to system user；Second, after halt turbines or before startup, no
Method be cooling water pump 201 provide drive power, now, start standby cooling water pump 301 to system user provide cooling water it is ensured that
The safe and reliable operation of system.
It is only necessary to the Steam Turbine Driven cooling water pump 201 that puts into operation under normal operation mode, only in halt turbines
Afterwards, start when and the maintenance stage just put into standby cooling water pump 301.The present invention has the advantage that
1st, this system adopts Steam Turbine Driven to replace conventional motors to drive cooling water pump.
2nd, this system directly leads out a road recirculating line in cooling water pump 201 outlet and recycling regulating valve 204 is connected to
Entrance circulating water pipe 1；
3rd, recycle regulating valve 204 flow and be chosen as the 30% of cooling water pump 201 metered flow, when steam turbine generator unit
When 101 startups or shutdown stage are also not up to rated speed 3000rpm, gradually adjustment recycles the aperture of regulating valve 204, foundation
Play cooling aqueous medium self-loopa, prevent cooling water pump 201 from cavitation occurring.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of invention, not to the scope of the present invention
Restriction, on the basis of technical scheme, those skilled in the art do not need to pay creative work and can make
Various modifications or deformation still within protection scope of the present invention.
Claims (5)
1. a kind of thermal power plant water cooling system, including Turbo-generator Set, cooling water pump one, is characterized in that, cooling water pump
One is connected with motor, and described cooling water pump one water inlet is connected with circulating water pipe one by pipeline, delivery port pass through pipeline with
The some user equipmenies needing cooling connect, the water inlet of cooling water pump one and the pipeline of water outlet end are respectively equipped with electronic every
From valve, user equipment is connected with circulating water pipe two, and circulating water pipe two-way piping is connected with circulating water pipe one, before user equipment
It is respectively equipped with isolating valve on the pipeline at two ends afterwards, be provided with cooling water pump two, cooling water between circulating water pipe one and user equipment
Pump two and cooling water pump one are to be arranged in parallel, and described cooling water pump two is connected with the output shaft of Turbo-generator Set, in cooling water
It is respectively equipped with motor-operated isolation valve on pump two water inlet and the pipeline of water outlet end, the pipeline of cooling water pump two water outlet end sets
There are flowmeter and pressure gauge.
2. thermal power plant as claimed in claim 1 water cooling system, is characterized in that, after described circulating water pipe one and flowmeter
It is provided with the pipeline three in parallel with cooling water pump two between the pipeline of cooling water pump two water outlet end of side, pipeline three is provided with again
Circulating regulation valve, pipeline three is located at motor-operated isolation valve and cooling water pump two with the link position of cooling water pump two water outlet end pipeline
Between.
3. thermal power plant as claimed in claim 1 water cooling system, is characterized in that, the front end axle of described Turbo-generator Set
Extend outward predetermined length and form connection end, described connection end adopts screw thread cooperation to be connected with shaft coupling one end, and shaft coupling is another
One end is connected with the power input shaft of cooling water pump two.
4. thermal power plant as claimed in claim 1 water cooling system, is characterized in that, described cooling water pump one, cooling water pump
Two using 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, is characterized in that, the flow of described recycling regulating valve is
The 30% of cooling water pump metered flow, when steam turbine generator unit starting or shutdown stage, is also not up to rated speed 3000rpm
When, gradually adjustment recycles the aperture of regulating valve it is established that the cooling aqueous medium self-circulation system of cooling water pump two；Work as recycling
When flow exceedes the 30% of metered flow, the outlet motor-operated isolation valve opening cooling water pump two supplies water to system user, simultaneously closes off
Recycle regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510603578.0A CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510603578.0A CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
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| CN105134307A CN105134307A (en) | 2015-12-09 |
| CN105134307B true CN105134307B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510603578.0A Active CN105134307B (en) | 2015-09-21 | 2015-09-21 | Water cooling system for thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| CN102720551B (en) * | 2012-07-02 | 2014-10-08 | 上海汽轮机厂有限公司 | Control method for steam thermal system with dual-machine backheating steam extraction |
| CN103397919B (en) * | 2013-08-13 | 2016-01-06 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine of industrial frequency generator speed governing drives feed-water pump and method |
| CN104832223B (en) * | 2015-06-02 | 2016-03-02 | 济南达能动力技术有限责任公司 | There is dead electricity self set-up type to meet an urgent need the steam turbine of oil supply system and method for work thereof |
| 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 |
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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. |