CN102644581A - Subsystem debugging method for un-commissioned circulating water system of firepower generator set - Google Patents
Subsystem debugging method for un-commissioned circulating water system of firepower generator set Download PDFInfo
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- CN102644581A CN102644581A CN2012100822276A CN201210082227A CN102644581A CN 102644581 A CN102644581 A CN 102644581A CN 2012100822276 A CN2012100822276 A CN 2012100822276A CN 201210082227 A CN201210082227 A CN 201210082227A CN 102644581 A CN102644581 A CN 102644581A
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Abstract
The invention relates to a subsystem debugging method for an un-commissioned circulating water system of a firepower generator set. The subsystem debugging method is characterized in that condensed delivered water is used a cooling medium of an air compressor system; a desalting water tank and a circulating system composed of a condensed delivering pump and a condensed water tank are used as auxiliary cooling means, so that the heat radiation problem of test run equipment is solved in a subsystem debugging process. Compared with the prior art, the subsystem debugging method has the beneficial effects that auxiliary equipment of the generator set is differentially treated according to heating amount; when an air compressor is subjected to a test run, the system is improved and an additional water source is considered to replace closed type water. With the adoption of a cooling water system, the cooling effect is obvious; and the subsystem debugging method has the advantages of simple structural design and mounting process, fewer temporary consumed materials, less water consumption water and small power consumption; under the condition of not commissioning the circulating water system, the power consumption of a factory is greatly saved, and the debugging work of each subsystem is guaranteed in an engineering debugging process, so that all connection points of engineering are smoothly engaged and a firm foundation is laid for on-time and smooth commission of the engineering.
Description
Technical field
The present invention draws and the testing and measuring technology of a kind of thermoelectric generator component system debug phase, particularly a kind of subsystem testing and measuring technology when circulation puts into operation condition because of certain reason does not temporarily also possess in thermal power plant.
Background technique
The thermal power generation unit is a great system engineering, and it need be through just putting into commercial operation behind monomer debugging, subsystem debugging and a whole set of startup test run supervisor after equipment installs.Circulation is the fundamental prerequisite that clammy fired power generating unit starts test run; Except that the cooling turbine discharge; The heat that produces during the operation of accessory machineries such as gas fan, induced draught fan, feed water pump, air compressor all will be taken away through closed cooling water system, and the enclosed cooling water then is to cool off with open cycle water through water-water exchanger.If there is not circulation, then cooling water system just can not be worked, and the heat that accessory machinery produced can't be taken away, and Aided Machine just can not carry out test run.Therefore; In the subsystem debugging, one of system that the debugging of circulation is normally carried out the earliest, the circulation test run finishes; Just can carry out the test run of open type water system, closed cooling water system; The debugging that next is only compressed air system has had pressurized air to debug some pneumatic valves, pneumatic baffle, last again other system is carried out test run.If because certain reason causes circulation not debug as scheduled, that debugging work that also just means other system can not be carried out.
General electric power plant circulating water system gets/and draining is in the sea or Large River, and in tidal land, river bank construction, the construction geology condition is more abominable, the engineering time restriction in flood season of making moist, the construction time is long.Sometimes there is uncertain factor in long distance construction execution conditions many thorny problems such as policy processing on the way that also involve complicated and changeable not only.Therefore the construction of circulation usually is the key factor of the whole project progress of influence.In power plant's Capital Construction Debugging, implement not have follow the debugging of pump subsystem can be one month earlier about in addition more project progress, given play to economic benefit in advance for engineering and imitated the crucial effect of playing with society.
Summary of the invention
Technical problem to be solved by this invention is: a kind of thermoelectric generator component system testing and measuring technology is provided, and the heat that produces when taking away the Aided Machine test run makes the good debug work that under the situation that circulation does not put into operation, still can carry out other system.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
The subsystem adjustment method that a kind of thermal power generation unit circulation does not put into operation; It is characterized in that: coagulating the cooling medium of water delivery as air compressor system; Sweet-water tank and the auxiliary cooling way of circulatory system conduct that coagulates defeated pump, condensate water tank composition, the heat dissipation problem of test run equipment when solving the subsystem debugging.
Specifically may further comprise the steps:
1) treats with a certain discrimination by heating value for the subsidiary engine equipment of generator set; The mode that adopts enclosed water to change water during general Aided Machine test run is cooled off; Promptly adopt to coagulate defeated pump and constantly mend low temperature to the enclosed water tank and coagulate water delivery, the mode of the enclosed water through closed Water System water return pipeline discharging heat simultaneously reaches control and reduces the purpose of enclosed coolant-temperature gage; The enclosed coolant-temperature gage is during greater than 40 ℃; The nothing of opening the subscriber's outlet that cooling water amount is bigger among the enclosed water user presses water spot and discharges water, and replenishes fresh demineralized water by condensate transfer pump to the enclosed water tank simultaneously, and control enclosed water temperature is below 30 ℃;
2) when the air compressor test run; System is transformed; Use a condensate transfer pump C to be cooling water demand bigger air compressor and cooling driers service thereof specially; The practical implementation step: isolate the closed water line of former steam turbine building closed Water System to pneumatics machine room, connect enclosed cooling water inlet pipe road in one tunnel interim pipeline to the pneumatics machine room from condensate transfer pump C export pipeline, and through enclosed CWR road in the pneumatics machine room; With interim pipe backwater is taken back again and coagulate defeated pump C recirculating line, with coagulating defeated pump A or coagulating defeated pump B and 2 sweet-water tanks are beaten to circulate and changed water cooling.
The present invention compared with prior art has following beneficial effect: the subsidiary engine equipment for generator set is treated with a certain discrimination by heating value, when the air compressor test run, system is transformed, and considers that other substitutes enclosed water in the water receiving source.
After adopting cooling water system of the present invention, cooling effect is remarkable, and the present invention has that simple, the interim consumptive material of project organization and mounting process is few, water usage and the little characteristics of power consumption; Under the situation of the circulation that do not come into operation; Practiced thrift station service greatly, in time guaranteed the debugging work of each subsystem in the engineering debug process, each contact of engineering is connected smoothly; For engineering on schedule, go into operation smoothly, laid solid foundation.
Description of drawings
Fig. 1, thermal power plant coagulate water delivery and change the cooling water system schematic representation into; Label among the figure is represented respectively: 1, coagulate defeated pump C inlet valve, 2, coagulate defeated pump C temporary export valve, 3, coagulate defeated pump C outlet valve; 4, coagulate water delivery Temporary Importation pipe; 5, coagulate water delivery temporary export pipe, 6, coagulate defeated pump C recirculation pipe, 7, coagulate defeated pump C recycle valve.
Fig. 2, thermal power plant's closed Water System schematic representation, the label among the figure is represented respectively: 1 ', the enclosed water tank coagulates the water delivery water-feeding valve, and 2 ', enclosed water tank water of condensation water-feeding valve, 3 ', little machine lube oil cooler water outlet place discharging valve, 4 ', enclosed water recycle valve.
Below in conjunction with accompanying drawing and practical implementation method the present invention is made further detailed description.
Embodiment
With the coal-fired unit of certain 1000MW of thermal power plant ultra supercritical is example, provides concrete application of the present invention.
The coal-fired unit of certain 1000MW of thermal power plant ultra supercritical because of the circulating water intake at tidal land; Execution conditions are abominable; Construction speed does not catch up with the overall progress of unit, but catches up with the social total short of electricity, for embodying the social responsibility of power industry; Implemented no circulation subsystem debugging; The present invention is coagulating the cooling medium of water delivery as air compressor system, and the circulatory system that sweet-water tank and with fixed attention defeated pump, condensate water tank are formed is as assisting cooling way, the heat dissipation problem of test run equipment during the debugging of solution subsystem.
Specifically take following measure:
1) treat with a certain discrimination by heating value for the subsidiary engine equipment of generator set, smaller because of the heat that spin friction produces for rotating machineries such as blower fan, air preheaters, the mode that adopts enclosed water to change water is carried out.The mode that adopts enclosed water to change water when being general Aided Machine test run is cooled off; Shown in figure (2); Comprise: the enclosed water tank coagulates water delivery water-feeding valve 1 ', enclosed water tank water of condensation water-feeding valve 2 ', little machine lube oil cooler water outlet place discharging valve 3 ', enclosed water recycle valve 4 '; Designed a kind of row's moisturizing heat exchange mode; Promptly adopt to coagulate defeated pump A or coagulate defeated pump B and constantly mend low temperature to the enclosed water tank and coagulate water delivery, the mode of the enclosed water through closed Water System water return pipeline discharging heat simultaneously reaches control and reduces the purpose of enclosed coolant-temperature gage.During enclosed coolant-temperature gage high (greater than 40 ℃); The nothing of opening the subscriber's outlet that cooling water amount is bigger among the enclosed water user presses water spot discharge water (like the little machine lube oil cooler water outlet place discharging valve 3 ' among Fig. 2); Replenish fresh demineralized water by condensate transfer pump to the enclosed water tank simultaneously, control the enclosed water temperature like this below 30 ℃.
Enclosed water is originally in circular flow constantly, and itself also overcomes the resistance conversion heat constantly, when no user; Finally have nearly temperature rise more than 20 ℃, if Aided Machine is arranged in test run, temperature constantly rises enclosed water flows through the cooler of supplementary equipment as cooling medium after; Must control the enclosed water temperature for reaching cooling effect; At this moment just must discharge the enclosed water of heat, and replenish fresh demineralized water toward closed Water System simultaneously, reach the effect of reduction enclosed water temperature through water return pipeline.
2) more and more along with the supplementary equipment that gets into debugging in the subsystem and put into operation; Enclosed water user can increase gradually; Compressed air system wherein must at first put into operation; This is to be related to the key whether each subsystem pneumatic valve of power plant can come into operation, if compressed air system can not come into operation as early as possible, its result will inevitably have influence on the debugging progress of each subsystem.When coming into operation, air compressor machine and cooling driers can produce a large amount of heats; When adopting the closed Water System cooling, the enclosed coolant-temperature gage can raise rapidly, if still adopt defeated pump changes the mode from moisturizing to closed Water System of coagulating; Then can't effectively control the temperature rise of enclosed water; Final closed Water System and compressed air system can be forced to because of enclosed water water temperature is too high stop transport, in case closed Water System and compressed air system are stopped transport, all the other each systems of power plant all can't debug and put into operation.
For air compressor, because of its compressed air to do work, bigger merit transforms for heat, needs more cooling water inflow to cool off, and the mode of leaning on enclosed water to change water can not satisfy the requirement of test run, considers that other substitutes enclosed water in the water receiving source.Usually, be furnished with the condensate transfer pump system near the pressurized air room, consider the cooling water system power (shown in accompanying drawing 1) of a usefulness condensate transfer pump wherein, coagulate the cooling water medium of water delivery as air compressor as air compressor.When the air compressor test run, the heat of generation is taken away by coagulating water delivery, to coagulating the heat exchange of water delivery case; And by coagulating the heat radiation of aqueduct and water tank ambient; Work as hot weather, when water delivery case water temperature still had little time to descend with fixed attention, available other water transport pump with fixed attention changed water to jumbo condensate water tank and lowers the temperature.
For this transforms system, use a condensate transfer pump (to coagulate defeated pump C, 93m specially
3/ h is bigger air compressor of cooling water demand and cooling driers service thereof 16.9kW), through 500m
3Condensate water tank is played circulation; As shown in Figure 1; Comprise condensate water tank, coagulate defeated pump A, coagulate defeated pump B; It also is provided with coagulates defeated pump C, and condensate water tank coagulates defeated pump C and links to each other through coagulating the interior enclosed cooling water inlet pipe road of water delivery Temporary Importation pipe 4, enclosed water inlet valve and pneumatics machine room through coagulating defeated pump C inlet valve 1 and coagulating defeated pump C and link to each other; Enclosed water out valve is passed through on enclosed CWR road in the pneumatics machine room, water delivery temporary export pipe 5 links to each other with fixed attention defeated pump C recirculation pipe 6 with fixed attention, links to each other with condensate water tank through failing pump C recycle valve 7 with fixed attention at last.Coagulating defeated pump A, with fixed attention defeated pump B links to each other with 2 sweet-water tanks through coagulating defeated pump discharge valve 3 respectively.At this moment, system flow is:
500m
3The defeated pump C recycle valve → 500m of the defeated pump C recirculation pipe of the defeated pump C of the defeated pump inlet valve of water tank → coagulate → coagulate → coagulate user → enclosed water out valves such as water delivery Temporary Importation pipe → enclosed water inlet valve → air compressor and cooling driers thereof → coagulate water delivery temporary export pipe → coagulate → coagulate
3Water tank.
Practical implementation: the closed water line of isolating former steam turbine building closed Water System to pneumatics machine room; Connect enclosed cooling water inlet pipe road in one tunnel interim pipeline to the pneumatics machine room from coagulating defeated pump C export pipeline; And, with interim pipe backwater is taken back again and coagulate defeated pump C recirculating line through enclosed CWR road in the pneumatics machine room.This design has utilized coagulates the geography superiority of defeated pump near the pneumatics machine room, has shortened the mounting distance of interim pipe greatly, has saved the consumptive material of interim pipe, and mounting process is simple, and another advantage is that with fixed attention defeated pump C power is less, helps saving station service.The cooling water of taking out of from air compressor and cooling driers that contains a large amount of heats is sent condensate water tank back to after getting back to and coagulating defeated pump C recirculating line, because the condensate water tank volume is bigger, total measurement (volume) reaches 500m
3Hot water can carry out abundant hybrid cooling in condensate water tank; The not open close condensate water tank of crossing dispels the heat to the external world; So the climbing speed of condensing water temperature is very slow, this makes the cooling water temperature rise of air compressor and cooling driers obtain effective control, can guarantee the work of air compressor and cooling driers long period.Adopt interim chilled water system of the present invention, if worked by day 12 hours, the cooling of stopping transport when ambient temperature is low evening, this mode can be used repeatedly and need not change water.
When in the condensate water tank during water temperature rise, with coagulating defeated pump A or B (300m
3/ h is 132kW) with 2 1500m
3Sweet-water tank is played circulation and is changed water cooling, like this 1 500m
3Condensate water tank and 2 1500m
3Sweet-water tank is as radiator, and ambient is dispelled the heat, the heat dissipation problem when having solved the subsidiary engine test run.At 500m
3When the water tank water temperature is high, utilize 2 1500m of chemical water making station
3Sweet-water tank is to 500m
3The pipeline of water tank water charging system adopts and coagulates defeated pump with 500m
3The higher hot water of temperature is mended 1500m in the chemical water making station in the water tank
3Sweet-water tank is again with another 1500m in the chemical water making station
3The water of condensation that temperature is lower in the sweet-water tank refills 500m
3Condensate water tank is through 500 m
32 1500m of condensate water tank and chemical water making station
3Sweet-water tank change water, solved 500m
3Water tank temperature is high changes water problems, and hot water is mended into 1500m simultaneously
3Can carry out natural cooling behind the sweet-water tank, need not the water of condensation resource have been practiced thrift in directly discharging to external world of hot water.
After the cooling problem when having solved the Aided Machine test run, just can under the situation that circulating water does not put into operation, normally carry out subsystem debugging work.For the washing pipe stage and a whole set of startup test run of fired power generating unit, because the more Aided Machine that need put into operation simultaneously still needs a large amount of circulating water.
The concrete test run duration of this unit is following: first air compressor test run starts from March 17th, 2011, and first is followed the pump test run and start from April 15th, 2011, and the boiler washing pipe starts from April 19.This shows, adopt interim cooling water system of the present invention, brought into play nearly 30 days effect, make engineering shift to an earlier date nearly about 1 month time, reduced a large amount of construction investment moneys, one month earlier generate electricity by way of merging two or more grid systems simultaneously.
See from practical application, adopt cooling water system of the present invention after, cooling effect is remarkable; And the present invention has that simple, the interim consumptive material of project organization and mounting process is few, water usage and the little characteristics of power consumption, under the situation of the circulation that do not come into operation, has practiced thrift station service greatly; In time guaranteed the debugging work of each subsystem in the engineering debug process; Each contact of engineering is connected smoothly, for engineering on schedule, go into operation smoothly, laid solid foundation.
The power of this every circulating water pump of power plant is 2800kW, and it is a mixed flow pump, calculates so test run phase power is pressed rated power; Deduction coagulates defeated pump A or B and coagulates the power consumption of defeated pump C, can practice thrift station service in 30 days: (2800kW-132kW-22kW) * 30d * 24h/d=1,905; 120kWh by Zhejiang Province's commercial power price in 2011, can reduce expenses: 1; 905,120 kWh * 0.866 yuan/kWh=164.98 ten thousand yuan, power plant's rate for incorporation into the power network is 0.48 yuan/kW; Gross coal consumption rate is 0.29kg/kWh, and it is 850 yuan/1000kg that power plant's standard is used the coal cost, and the 1000MW unit calculates according to 30 days mode of the continuous operation of 80% Rate of load condensate; Can directly produce economic benefit is: 1,000,000 kW * 30d * 24h/d * (0.48 yuan/kWh-0.29kg/kWh * 850 yuan/1000kg) * and 80%=1,3,449 ten thousand yuan, 13,449 ten thousand yuan+164.98 ten thousand yuan=13614.58 ten thousand yuan; Add 30 days cost such as construction investment cost and water saving; After adopting the present invention, conservative estimation is for this project has been created the benefit more than 1.36 hundred million yuan.This shows, the invention of the subsystem adjustment method that this thermal power generation unit circulation does not put into operation, the prospect of its popularization and utilization is boundless.
Claims (2)
1. subsystem adjustment method that thermal power generation unit circulation does not put into operation; It is characterized in that: coagulating the cooling medium of water delivery as air compressor system; Sweet-water tank and the auxiliary cooling way of circulatory system conduct that coagulates defeated pump, condensate water tank composition, the heat dissipation problem of test run equipment when solving the subsystem debugging.
2. the subsystem adjustment method that a kind of thermal power generation unit circulation as claimed in claim 1 does not put into operation is characterized in that specifically may further comprise the steps:
1) treats with a certain discrimination by heating value for the subsidiary engine equipment of generator set; The mode that adopts enclosed water to change water during general Aided Machine test run is cooled off; Promptly adopt to coagulate defeated pump and constantly mend low temperature to the enclosed water tank and coagulate water delivery, the mode of the enclosed water through closed Water System water return pipeline discharging heat simultaneously reaches control and reduces the purpose of enclosed coolant-temperature gage; The enclosed coolant-temperature gage is during greater than 40 ℃; The nothing of opening the subscriber's outlet that cooling water amount is bigger among the enclosed water user presses water spot and discharges water, and replenishes fresh demineralized water by condensate transfer pump to the enclosed water tank simultaneously, and control enclosed water temperature is below 30 ℃;
2) when the air compressor test run; System is transformed; Use a condensate transfer pump C to be cooling water demand bigger air compressor and cooling driers service thereof specially; The practical implementation step: isolate the closed water line of former steam turbine building closed Water System to pneumatics machine room, connect enclosed cooling water inlet pipe road in one tunnel interim pipeline to the pneumatics machine room from condensate transfer pump C export pipeline, and through enclosed CWR road in the pneumatics machine room; With interim pipe backwater is taken back again and coagulate defeated pump C recirculating line, with coagulating defeated pump A or coagulating defeated pump B and 2 sweet-water tanks are beaten to circulate and changed water cooling.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104595885A (en) * | 2015-02-05 | 2015-05-06 | 广东电网有限责任公司电力科学研究院 | Control method of minimum-flow recirculation valve of water supply pump of power station boiler |
| CN110057205A (en) * | 2018-01-18 | 2019-07-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Box-like cooling water system in a kind of opened water and recirculated water |
| CN110686234A (en) * | 2019-03-08 | 2020-01-14 | 安徽皖能电力运营检修有限公司 | Circulating fluidized bed cooling system |
| CN111126810A (en) * | 2019-12-16 | 2020-05-08 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating operation safety of source side generator set |
| CN112128730A (en) * | 2020-09-15 | 2020-12-25 | 华北电力科学研究院有限责任公司西安分公司 | Cleaning and film forming system for closed water system of thermal power plant and operation method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595885A (en) * | 2015-02-05 | 2015-05-06 | 广东电网有限责任公司电力科学研究院 | Control method of minimum-flow recirculation valve of water supply pump of power station boiler |
| CN104595885B (en) * | 2015-02-05 | 2016-06-08 | 广东电网有限责任公司电力科学研究院 | Station boiler Minimum Flowrate of Feed Pump recycle valve control method |
| CN110057205A (en) * | 2018-01-18 | 2019-07-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Box-like cooling water system in a kind of opened water and recirculated water |
| CN110057205B (en) * | 2018-01-18 | 2024-05-28 | 中国电力工程顾问集团华东电力设计院有限公司 | Open water and circulating water combined cooling water system |
| CN110686234A (en) * | 2019-03-08 | 2020-01-14 | 安徽皖能电力运营检修有限公司 | Circulating fluidized bed cooling system |
| CN111126810A (en) * | 2019-12-16 | 2020-05-08 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating operation safety of source side generator set |
| CN111126810B (en) * | 2019-12-16 | 2023-08-22 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating operation safety of source side generator set |
| CN112128730A (en) * | 2020-09-15 | 2020-12-25 | 华北电力科学研究院有限责任公司西安分公司 | Cleaning and film forming system for closed water system of thermal power plant and operation method |
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Application publication date: 20120822 |