CN103776016A - Startup and shutdown system applicable to reactor comprising once-through steam generator - Google Patents
Startup and shutdown system applicable to reactor comprising once-through steam generator Download PDFInfo
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- CN103776016A CN103776016A CN201210406177.2A CN201210406177A CN103776016A CN 103776016 A CN103776016 A CN 103776016A CN 201210406177 A CN201210406177 A CN 201210406177A CN 103776016 A CN103776016 A CN 103776016A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The invention belongs to the field of nuclear reactors and particularly relates to a startup and shutdown system applicable to a reactor comprising a once-through steam generator. the startup and shutdown system applicable to the reactor comprising the once-through steam generator comprises a system inlet pipe set with one end connected with the main steam pipeline of the once-through steam generator, a temperature and pressure reducing valve with the working medium inlet connected with the other end of the system inlet pipe set, a first pipe with one end connected with the working medium outlet of the temperature and pressure reducing valve, a process condenser with the working medium inlet connected with the other end of the first pipe, a system outlet pipe set with one end connected with the working medium of the process condenser, and startup water feeding pumps arranged on the system outlet pipe set. The other end of the system outlet pipe set is connected to the water feeding system of the reactor. The startup and shutdown system applicable to the reactor comprising the once-through steam generator avoids the problems due to usage of unqualified steam of steam equipment of a secondary loop and simplifies the system configuration. When water feeding sources of the feeding system malfunctions, the two startup water feeding pumps of the startup and shutdown system can be put into production and provide 50% of rated fed water flow.
Description
Technical field
The invention belongs to nuclear reactor field, be specifically related to a kind of start stop system that is applicable to adopt once through steam generator reactor.
Background technology
The steam generator that nuclear power station adopts both at home and abroad mostly at present is natural circulation steam generator, and some Small reactors have adopted small-sized, efficient once through steam generator now.Once through steam generator is starting the raising along with thermic load of when operation, steam generator secondary side outlet working medium from water to steam water interface, saturated vapor and superheated steam change, until produce the superheated steam meeting the demands, thereby complete whole start-up course, it is out of service is the inverse process that starts operation.The working medium that does not meet instructions for use (water, steam water interface, saturated vapor) that secondary coolant circuit system need to produce once through steam generator in shutdown process is carried out disposal and utilization, and once through steam generator has specific requirement in startup operation and flow, temperature, the pressure that secondary circuit is fed water out of service.Therefore,, for the reactor that adopts once through steam generator, special start stop system need to be set and complete the steam/water circulating that starts operation and process out of service.
Summary of the invention
The object of this invention is to provide one and be applicable to adopt once through steam generator, to realize the reactor start stop system of the steam/water circulating in once through steam generator startup and process out of service.
In order to realize object of the present invention, by the following technical solutions, a kind of start stop system that adopts once through steam generator reactor, comprise the system inlet tube group that one end is connected with the main steam pipe of once through steam generator, the steam converter valve that working medium import is connected with the described system inlet tube group other end, the first pipeline that one end is connected with the sender property outlet of described steam converter valve, the process condensate device that working medium import is connected with the other end of described the first pipeline, the system outlet pipe group that one end is connected with the sender property outlet of described process condensate device, be arranged on the startup feed pump in described system outlet pipe group, the other end of described system outlet pipe group is connected to the water supply system of reactor.
Further described steam converter valve is multistage orifice plate decompression and spray desuperheating valve, and its inner spray desuperheating device is connected with outside desuperheat cooling water pipe.
Further described process condensate device is surface-type heat exchanger, it comprises housing, is arranged on the cooling water piping in housing, the working medium import of described cooling water piping is connected with outer loop water inlet pipe, and the sender property outlet of cooling water piping is connected with outer loop water outlet pipe.
In further described system outlet pipe group, be also provided with feed water filter, check-valves, isolating valve.
Further comprise the second pipeline that one end is connected with described system outlet pipe group, the described feedwater second pipeline other end is connected with water supply source.
Further described system inlet tube group comprises two pipelines in parallel.
Further described system outlet pipe group comprises two pipelines in parallel.
Further described water supply system comprises that an one end is connected to the feed pipe group that the supply line group of described system outlet pipe group, one end are connected with the described main feed line other end, and the other end of described feed pipe group is connected on the main feed line of steam generator.
Technique effect of the present invention is:
(1) this system is provided with steam converter valve, process condensate device and starts feed pump, circulation, the problem of having avoided secondary circuit gas utilization unit to use the steam of defective quality to bring are processed and made it to the working medium producing during to once through steam generator irregular operation;
(2) start stop system does not set up water supply line, and has used the supply line group of water supply system, thereby has simplified system configuration;
(3), if the water supply source of water supply system provides to be broken down, two startup feed pumps of start stop system drop into, and 50% specified feedwater flow can be provided.
Accompanying drawing explanation
Fig. 1 is a kind of integral reactor start stop system of the present invention schematic diagram;
Fig. 2 is the water supply system part schematic diagram of using during with the operation of a kind of integral reactor start stop system of the present invention;
Wherein, 1 is start stop system import isolating valve; 2 is steam converter valve; 3 is steam converter valve cooling water isolating valve; 4 is steam converter valve cooling water isolating valve; 5 is process condensate device; 6 is recirculated water import and export isolating valve; 7 is circulating water intake control valve; 8 is process condensate device isolating valve; 9 for starting feed pump import isolating valve; 10 is feed water filter; 11 for starting feed pump; 12 for starting feed pump outlet non-return valve; 13 for starting feed pump outlet isolating valve; 14 is start stop system and water supply source isolating valve; 15 is system inlet tube group; 16 major steam lines; 17 is outside desuperheat water pipe; 18 is water supply source; 19 is containment; 20 is the import of water supply system working medium; 21 is system outlet pipe group; 22 is main feed-regulating valve entrance isolating valve; 23 is main feed-regulating valve; 24 is main feed water isolating valve; 25 is bypass feed-regulating valve entrance isolating valve; 26 is bypass feed-regulating valve; 27 is bypass feedwater isolation valve; 28 is flowmeter; 29 is orifice plate; 30 is feed water check valve; 31 is circulating water intake pipe; 32 for recirculated water is except a mouthful pipe; 33 is the first pipeline; 34 is female pipe; 35 is main feed line; 36 is bypass; 37 is supply channel; 38 is the second pipeline; 39 is tributary steam generator.
The specific embodiment
Below in conjunction with Fig. 1, Fig. 2 and embodiment, the present invention is further illustrated.
The start stop system of a kind of integral reactor of the present invention, its system inlet tube group 15 comprises two pipelines in parallel, an import isolating valve 1 is set respectively on every pipeline, and every pipeline one end is all connected with the major steam line of tributary steam generator 39 in main steam system, their other end is connected with the working medium import of the steam converter valve 2 of a multistage orifice plate decompression in inside and spray desuperheating; The spray Desuperheating device of these steam converter valve 2 inside is connected with outside desuperheat water pipe 17 one end, and these outside desuperheat water pipe 17 other ends are connected with water supply source 18; On this outside desuperheat water pipe 17, be provided with a steam converter valve cooling water isolating valve 3 and a steam converter valve cooling water isolating valve 4;
One is the process condensate device 5 of surface-type heat exchanger, and it comprises housing, is arranged on the cooling water piping in housing, is provided with working medium import and the sender property outlet of condensation vapour on housing, and described cooling water piping is arranged between above-mentioned working medium import and sender property outlet; The working medium import of described process condensate device 5 is connected by the first pipeline 33 with the sender property outlet of steam converter valve 2; And one end of the close working medium inlet side of cooling water piping is connected with the circulating water intake pipe 31 of this hull outside, one end of close sender property outlet side of cooling water piping and the recirculated water of this hull outside are managed 32 except mouth and are connected, on described circulating water intake pipe 31 and circulating water outlet pipe 32, be provided with recirculated water and import and export isolating valve 6, and a circulating water intake control valve 7 is also set on circulating water intake pipe 31; The sender property outlet of described process condensate device 5 is provided with a process condensate device isolating valve on it mother by one manages 34 and is connected in system outlet pipe group 21.
System outlet pipe group 21 is two pipelines in parallel, starts feed pump import isolating valve 9, feed water filter 10, starts feed pump 11, starts feed pump outlet non-return valve 12, starts feed pump outlet isolating valve 13 on its each pipeline from being disposed with near female pipe 34 ends;
System outlet pipe group 21 is connected with water supply system working medium import 20; Particularly, water supply system comprises main feed line group and two the feed pipe groups that supply channel 37 in parallel forms that a main feed line 35 being connected with system outlet pipe group 21 and the bypass 36 in parallel with this main feed line 35 form, and the upstream extremity of the parallel pipeline that main feed line 35 forms with bypass 36 is connected away from one end of described female pipe 34 with two parallel pipelines of said system outlet group 21; Described main feed line 35 has main feed-regulating valve entrance isolating valve 22, main feed-regulating valve 23 and main feed water isolating valve 24 from upstream to arranged downstream; Described bypass 36 has bypass feed-regulating valve entrance isolating valve 25, bypass feed-regulating valve 26 and bypass feedwater isolation valve 27 from upstream to arranged downstream; On described two feed pipes 37 in parallel, be all disposed with a flowmeter 28, orifice plate 29 to downstream from upstream and respectively at two inside and outside feed water check valves 30 of containment 19; Article two, feed pipe 37 one end in parallel are connected in series with described main feed line 35 and bypass 36 in parallel, and two feed pipe 37 other ends in parallel are connected respectively on the supply line of once through steam generator 39 in integral reactor;
Article one, second pipeline 38 one end are connected on a wherein pipeline of said system outlet group 21 parallel pipelines, and their link position is between the startup feed pump import isolating valve 9 wherein arranging on a pipeline near female pipe 34 ends and this of this parallel pipeline; Above-mentioned second pipeline 38 other ends are connected with water supply source 18, and on it, are provided with start stop system and water supply source isolating valve 14;
In the time that integral reactor start stop system of the present invention carries out, to need working medium to be processed to introduce start stop system from main steam system, be introduced into steam converter valve 2 it is carried out to multistage orifice plate decompression and spray desuperheating, required cooling water enters described desuperheat cooling water pipe 17, and is regulated according to the temperature after steam converter valve by steam converter valve cooling sea water regulating valve 3.Working medium enters process condensate device 5 through the sender property outlet end outflow of steam converter valve 2 through the first pipeline 33 and is condensed into solidifying water by the cooling piping of its inside, the low-temperature receiver of this process condensate device 5 is provided by outer loop water inlet pipe, recirculated water flows through in cooling water piping, make cooling water piping outer surface in cold conditions, steam discharge is because contacting and condensed with cooling water pipe outer surface, and the latent heat of condensation is taken away by recirculated water.Then condensate water enters tributary steam generator 39 through starting feed pump 10 through the bypass 36 of water supply system and the feed pipe 37 of water supply system, and now the bypass feed-regulating valve 26 of water supply system is opened, thereby main feed-regulating valve 23 cuts out realization isolation.
Two startup feed pumps 10 in said system outlet group are speed change electric centrifugal pump, and start and stop whens operation, a startup feed pump 10 can provide corresponding flow, i.e. another is for subsequent use in operation.If the water supply source of water supply system 18 sends feedwater fault, two startup feed pumps 10 can drop into automatically, and 50% specified feedwater flow can be provided.
Claims (8)
1. one kind adopts the start stop system of once through steam generator reactor, it is characterized in that: comprise the system inlet tube group that one end is connected with the main steam pipe of once through steam generator, the steam converter valve that working medium import is connected with the described system inlet tube group other end, the first pipeline that one end is connected with the sender property outlet of described steam converter valve, the process condensate device that working medium import is connected with the other end of described the first pipeline, the system outlet pipe group that one end is connected with the sender property outlet of described process condensate device, be arranged on the startup feed pump in described system outlet pipe group, the other end of described system outlet pipe group is connected to the water supply system of reactor.
2. start stop system as claimed in claim 1, is characterized in that: described steam converter valve is multistage orifice plate decompression and spray desuperheating valve, and its inner spray desuperheating device is connected with outside desuperheat cooling water pipe.
3. start stop system as claimed in claim 1, it is characterized in that: described process condensate device is surface-type heat exchanger, it comprises housing, is arranged on the cooling water piping in housing, the working medium import of described cooling water piping is connected with outer loop water inlet pipe, and the sender property outlet of cooling water piping is connected with outer loop water outlet pipe.
4. start stop system as claimed in claim 1, is characterized in that: in described system outlet pipe group, be also provided with feed water filter, check-valves, isolating valve.
5. start stop system as claimed in claim 1, is characterized in that: also comprise the second pipeline that one end is connected with described system outlet pipe group, the described feedwater second pipeline other end is connected with water supply source.
6. start stop system as claimed in claim 1, is characterized in that: described system inlet tube group comprises two pipelines in parallel.
7. start stop system as claimed in claim 1, is characterized in that: described system outlet pipe group comprises two pipelines in parallel.
8. start stop system as claimed in claim 1, it is characterized in that: described water supply system comprises that an one end is connected to the feed pipe group that the supply line group of described system outlet pipe group, one end are connected with the described main feed line other end, and the other end of described feed pipe group is connected on the main feed line of steam generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406177.2A CN103776016A (en) | 2012-10-23 | 2012-10-23 | Startup and shutdown system applicable to reactor comprising once-through steam generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406177.2A CN103776016A (en) | 2012-10-23 | 2012-10-23 | Startup and shutdown system applicable to reactor comprising once-through steam generator |
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| CN103776016A true CN103776016A (en) | 2014-05-07 |
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| CN201210406177.2A Pending CN103776016A (en) | 2012-10-23 | 2012-10-23 | Startup and shutdown system applicable to reactor comprising once-through steam generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321586A (en) * | 2015-09-29 | 2016-02-10 | 中国核动力研究设计院 | Testing system for simulating steam consumption of secondary circuit steam turbine |
| CN109632354A (en) * | 2018-12-03 | 2019-04-16 | 中国舰船研究设计中心 | U-tube steam generator steam (vapor) outlet external characteristics simulator and analogy method |
| CN110186026A (en) * | 2019-05-06 | 2019-08-30 | 中广核研究院有限公司 | The dry type hot starting, hot start method of continuous steam generator |
| CN111023072A (en) * | 2019-12-18 | 2020-04-17 | 中广核研究院有限公司 | Two return circuits of straight-flow steam generator open and stop system |
| CN114038587A (en) * | 2021-11-10 | 2022-02-11 | 中国核动力研究设计院 | Start-stop system and method suitable for modular small pressurized water reactor nuclear power plant |
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| JP2003176901A (en) * | 2001-12-10 | 2003-06-27 | Kurita Water Ind Ltd | Method for controlling boiler system |
| JP3544689B2 (en) * | 1993-08-06 | 2004-07-21 | バブコック日立株式会社 | Start-up controller for variable-pressure once-through boiler |
| CN1550019A (en) * | 2001-07-24 | 2004-11-24 | ����ͨAnp����˾ | Method and device for supplying pressurised water to a steamgenerator of a nuclear reactor during shut-down periods of the reactor |
| CN202947115U (en) * | 2012-10-22 | 2013-05-22 | 中国核动力研究设计院 | Start-stop system adopting direct current vapor generator reactor |
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2012
- 2012-10-23 CN CN201210406177.2A patent/CN103776016A/en active Pending
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| JP3544689B2 (en) * | 1993-08-06 | 2004-07-21 | バブコック日立株式会社 | Start-up controller for variable-pressure once-through boiler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321586A (en) * | 2015-09-29 | 2016-02-10 | 中国核动力研究设计院 | Testing system for simulating steam consumption of secondary circuit steam turbine |
| CN105321586B (en) * | 2015-09-29 | 2017-04-05 | 中国核动力研究设计院 | A kind of simulation secondary circuit steam turbine consumes the pilot system of vapour |
| CN109632354A (en) * | 2018-12-03 | 2019-04-16 | 中国舰船研究设计中心 | U-tube steam generator steam (vapor) outlet external characteristics simulator and analogy method |
| CN110186026A (en) * | 2019-05-06 | 2019-08-30 | 中广核研究院有限公司 | The dry type hot starting, hot start method of continuous steam generator |
| CN111023072A (en) * | 2019-12-18 | 2020-04-17 | 中广核研究院有限公司 | Two return circuits of straight-flow steam generator open and stop system |
| CN111023072B (en) * | 2019-12-18 | 2022-01-11 | 中广核研究院有限公司 | Two return circuits of straight-flow steam generator open and stop system |
| CN114038587A (en) * | 2021-11-10 | 2022-02-11 | 中国核动力研究设计院 | Start-stop system and method suitable for modular small pressurized water reactor nuclear power plant |
| CN114038587B (en) * | 2021-11-10 | 2023-11-24 | 中国核动力研究设计院 | Start-stop system and method suitable for modularized small pressurized water reactor nuclear power plant |
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Application publication date: 20140507 |