CN106384613B - A kind of nuclear power plant's Auxiliary Steam and processing method - Google Patents
A kind of nuclear power plant's Auxiliary Steam and processing method Download PDFInfo
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- CN106384613B CN106384613B CN201610822622.1A CN201610822622A CN106384613B CN 106384613 B CN106384613 B CN 106384613B CN 201610822622 A CN201610822622 A CN 201610822622A CN 106384613 B CN106384613 B CN 106384613B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
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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
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Abstract
The invention provides a kind of nuclear power plant's Auxiliary Steam and processing method, the system includes, for transmitting the main steam line of main steam caused by secondary circuit；For being converted to the steam transition components of auxiliary steam after main steam is depressurized；For the auxiliary steam after conversion to be transmitted to the auxiliary steam pipeline component of unit user, the device configuration that the present invention passes through simplified Auxiliary Steam, the equipment investment and follow-up operation and maintenance expenses for reducing system are used, and the frequency that comes into operation of nuclear power plant's donkey boiler is effectively reduced, improve the overall economy of nuclear power plant from the angle of initial cost and operating cost；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
Description
Technical field
The present invention relates to nuclear power plant's technical field, more particularly to a kind of nuclear power plant's Auxiliary Steam and processing method.
Background technology
The effect of nuclear power plant's Auxiliary Steam mainly meets unit starting and oxygen-eliminating device, steamer during normal operation
The user's such as arbor envelope and hot water production heater uses vapour demand, and steam used is 1.2MPa.a or so saturated vapor.
Domestic built nuclear power plant generally realizes auxiliary steam using steam converter system and donkey boiler at present
Production, i.e. nuclear power plant's first operating unit using donkey boiler provides auxiliary steam during starting, and in first operating unit normal operation
Afterwards, used by auxiliary steam caused by steam converter system for the startup of follow-up unit and operation.Its main method is：Will
System feedwater after thermal de-aeration is transmitted to thin cooler by STR pumps；Transmitted after dredging cooler heating to steam converter；
The thermal source that the superheated steam to feed water after being depressurized in steam converter by main steam provides, it is heated to be 1.2MPa.a auxiliary
Steam, there is provided to user.
During the present invention is realized, inventor has found that prior art at least has problems with：
System includes STR oxygen-eliminating devices, steam converter, dredges numerous equipment such as cooler, causes the buying expenses of equipment high, together
When system maintenance cost it is high, be unfavorable for controlling the construction cost of nuclear power plant；The efficiency of auxiliary steam is produced by prior art
It is relatively low, such as in some nuclear power projects, 40.9t/h main steam can only produce 37t/h auxiliary steam.
The content of the invention
The present invention is complicated for nuclear power plant's Auxiliary Steam, and equipment purchase and maintenance cost are high, and low production efficiency is asked
Topic, there is provided a kind of nuclear power plant's Auxiliary Steam and processing method.
The technical scheme that the present invention proposes with regard to above-mentioned technical problem is as follows：
The invention provides a kind of nuclear power plant's Auxiliary Steam, the system includes：
Main steam line, connection nuclear power plant secondary circuit, for transmitting main steam caused by secondary circuit；
Steam transition components, the main steam line is connected, for being converted to auxiliary steam after main steam is depressurized；
At least auxiliary steam pipeline component all the way, connects the steam transition components, for by the auxiliary steam after conversion
Transmit to unit user.
According to said system, the auxiliary steam pipeline component include parallel arrangement of first auxiliary steam pipeline component and
Second auxiliary steam pipeline component,
First auxiliary steam pipeline component includes the first isolating valve and the first auxiliary steam pipeline, the second auxiliary steam pipeline
Component includes the second isolating valve and the second auxiliary steam pipeline, and the input of first isolating valve and the second isolating valve connects jointly
Be connected to the output end of the steam transition components, the output end of first isolating valve and the second isolating valve be connected respectively to
For auxiliary steam to be transferred to the first auxiliary steam pipeline of the unit user and for auxiliary steam to be transferred into adjacent machine
The second auxiliary steam pipeline of group user.
According to said system, the steam transition components include the pneumatic operated valve that is connected with main steam line, and with it is described
The pressure-reducing valve for being used to main steam being decompressed to the auxiliary steam needed for preset pressure value of pneumatic operated valve connection.
According to said system, the pneumatic operated valve simultaneously closes off when main steam line closes, the pneumatic valve closing time
Less than 5 seconds.
According to said system, the Auxiliary Steam also includes：
Control assembly, the pneumatic operated valve and pressure-reducing valve is connected respectively, for judging the off state of main steam isolation valve, root
According to off state, pneumatic operated valve turns off or on described in Synchronization Control.
According to said system, the Auxiliary Steam also includes：
Pressure measuring instrument, it is connected between the pressure-reducing valve and the first isolating valve, the second isolating valve and connects the control
Component, for measuring the actual pressure value of decompression valve outlet and transmitting the actual pressure value to the control assembly；
The control assembly is additionally operable to set the preset pressure value, and receives the actual pressure value, when the reality
When pressure value is not inconsistent with the preset pressure value, controls the pressure-reducing valve adjustment openings of sizes and alarm.
According to said system, the preset pressure value is 1.2MPa.a.
According to said system, have between first isolating valve and the first auxiliary steam pipeline for will in pipeline caused by
First drain water piping of hydrophobic discharge, it is provided between second isolating valve and the second auxiliary steam pipeline for by pipeline
Second drain water piping of caused hydrophobic discharge, first drain water piping and the second drain water piping hydrophobic are discharged into collection by what is collected
In puddle.
According to said system, the catch pit is also associated with emptying pump, for by drain discharge to conventional island discharging of waste liquid
System carries out subsequent treatment.
According to said system, the Auxiliary Steam also includes：
Steam turbine, be connected between the main steam line and pneumatic operated valve, for by main steam by six grades of conversions of drawing gas
For moist steam；
Steam-water separation case, it is connected between the pneumatic operated valve and pressure-reducing valve, for being dehumidified to the moist steam, and will
Main steam after dehumidifying is transmitted to the pressure-reducing valve.
According to said system, it is provided between first isolating valve and the first auxiliary steam pipeline for will be produced in pipeline
First drain water piping of raw hydrophobic discharge, the auxiliary steam pipeline component also include the 3rd drain water piping, and the described 3rd dredges
The input of waterpipe connects the steam-water separation case, and the output end of the 3rd drain water piping connects first drain pipe
Road, for by caused hydrophobic discharge in the steam-water separation case.
Present invention also offers a kind of processing method of nuclear power plant's auxiliary steam, it is characterised in that methods described includes：
S1, reception simultaneously transmit main steam caused by nuclear power plant's secondary circuit；
S2, be converted to auxiliary steam after main steam is depressurized；
S3, the auxiliary steam after conversion transmitted to unit user.
According to the above method, the step S2 includes：
S21, judge main steam isolation valve whether unlatching, according to off state, the closing of pneumatic operated valve described in Synchronization Control
Or open；
S22, the preset pressure value is set, when the pneumatic operated valve is opened, is decompressed to main steam by pressure-reducing valve pre-
If the auxiliary steam needed for pressure value.
According to the above method, the step S3 includes：
S31, auxiliary steam is transferred to the unit user by the first auxiliary steam pipeline；
S32, auxiliary steam is transferred to adjacent unit user by the second auxiliary steam pipeline.
According to the above method, the step S2 also includes：
S23, measurement decompression valve outlet actual pressure value, and judge whether it is consistent with preset pressure value；
S24, when the actual pressure value and the preset pressure value are not inconsistent, alarm and control the pressure-reducing valve adjustment to open
Mouth size.
According to the above method, the step S3 also includes：
S33, by caused in the first auxiliary steam pipeline hydrophobic conventional island discharging of waste liquid is discharged into by the first drain water piping
System carries out subsequent treatment；
S34, by caused in the second auxiliary steam pipeline hydrophobic catch pit is discharged into by the second drain water piping；
S35, by emptying pump by drain discharge to conventional island discharging of waste liquid system carry out subsequent treatment.
According to the above method, also include before the step S21：
S25, main steam is drawn gas by six grades by steam turbine is converted to moist steam；
Also include before the step S22：
S26, by steam-water separation case the moist steam is dehumidified, the main steam after by dehumidifying, which is transmitted to described, to be subtracted
Pressure valve.
According to the above method, also include before the step S33：
S36, by hydrophobic caused by the steam-water separation case the first drain water piping is discharged into by the 3rd drain water piping.The present invention
The beneficial effect brought of technical scheme that embodiment provides is：
By simplifying the device configuration of Auxiliary Steam, the equipment investment of system and follow-up operation and maintenance expenses are reduced
With, and the frequency that comes into operation of nuclear power plant's donkey boiler is effectively reduced, it is whole to improve nuclear power plant from the angle of initial cost and operating cost
The economy of body；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
Brief description of the drawings
Fig. 1 is a kind of structural representation for nuclear power plant's Auxiliary Steam that the embodiment of the present invention one provides.
Fig. 2 is a kind of structural representation for nuclear power plant's Auxiliary Steam preferred embodiment that the embodiment of the present invention one provides
Figure.
Fig. 3 is a kind of nuclear power plant's Auxiliary Steam flow chart that the embodiment of the present invention two provides.
Fig. 4 is a kind of nuclear power plant's Auxiliary Steam flow chart that the embodiment of the present invention two provides.
Fig. 5 is a kind of structural representation for nuclear power plant's Auxiliary Steam preferred embodiment that the embodiment of the present invention three provides
Figure.
Fig. 6 is a kind of nuclear power plant's Auxiliary Steam flow chart that the embodiment of the present invention four provides.
Embodiment
In order to solve the problem of nuclear power plant's Auxiliary Steam complexity, equipment purchase and maintenance cost height, low production efficiency,
The present invention is intended to provide a kind of processing method of nuclear power plant's auxiliary steam, its core concept are：It is proposed that a kind of nuclear power plant's auxiliary is steamed
Vapour system, by simplifying the device configuration of Auxiliary Steam, the equipment investment and follow-up operation and maintenance expenses that reduce system are used,
And the frequency that comes into operation of nuclear power plant's donkey boiler is effectively reduced, improve nuclear power plant's entirety from the angle of initial cost and operating cost
Economy；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
In order that the object, technical solutions and advantages of the present invention are clearer, result accompanying drawing is implemented to the present invention below
Mode is described in further detail.
Embodiment one
The embodiments of the invention provide a kind of nuclear power plant's Auxiliary Steam, and referring to Fig. 1, the system includes：
Main steam line 10, connection nuclear power plant secondary circuit, for transmitting main steam caused by secondary circuit；
Steam transition components 20, main steam line 10 is connected, for being converted to auxiliary steam after main steam is depressurized；
At least auxiliary steam pipeline component 30 all the way, connection steam transition components 20, for by the auxiliary steam after conversion
Transmit to unit user 40.
Specifically, parallel arrangement of first auxiliary steam pipeline component is included referring to Fig. 2, institute's auxiliary steam pipeline component 30
With the second auxiliary steam pipeline component,
First auxiliary steam pipeline component includes the first isolating valve 301 and the first auxiliary steam pipeline 302, and the second auxiliary is steamed
Vapour conduit assembly includes the second isolating valve 303 and the second auxiliary steam pipeline 304, the first isolating valve 301 and the second isolating valve 303
Input be commonly connected to the output end of the output ends of steam transition components 20, the first isolating valve 301 and the second isolating valve 303
It is connected respectively to for auxiliary steam to be transferred to the first auxiliary steam pipeline 302 of the unit user and for that will aid in
Vapor transmission gives the second auxiliary steam pipeline 304 of adjacent unit user.
Specifically, referring to Fig. 2, steam transition components 20 include the pneumatic operated valve 201 being connected with main steam line, and with gas
The pressure-reducing valve 202 for being used to main steam being decompressed to the auxiliary steam needed for preset pressure value that dynamic valve 201 connects.
In the present embodiment, the closing of pneumatic operated valve 201 can effectively prevent radioactive diffusion；The pass of pneumatic operated valve 201
The time is closed less than 5 seconds, by judgement of the control assembly 50 to the off state of main steam isolation valve, holding and main steam isolation valve
Synchronous regime, Auxiliary Steam and conventional island secondary coolant circuit system is possessed same radioactive shield horizontal.
In the present embodiment, because pressure-reducing valve 202 is than normally isolating the complicated of valve, in system operation easily
Break down, so being realized by pneumatic operated valve 201, the first isolating valve 301 and the second isolating valve 303 to the online of pressure-reducing valve 202
Maintenance, ensures its normal operation.
Specifically, also include referring to Fig. 2, Auxiliary Steam：
Control assembly 50, pneumatic operated valve 201 and pressure-reducing valve 202 is connected respectively, for judging the shut-off shape of main steam isolation valve
State, according to off state, Synchronization Control pneumatic operated valve 201 turns off or on.
Specifically, also include referring to Fig. 2, Auxiliary Steam：
Pressure measuring instrument 501, it is connected between the isolating valve 301 of pressure-reducing valve 202 and first, the second isolating valve 303, and connects
Control assembly 50, for measuring the actual pressure value of the outlet of pressure-reducing valve 202 and transmitting actual pressure value to control assembly 50；
Control assembly 50 is additionally operable to set preset pressure value, and receives actual pressure value, when actual pressure value and default pressure
When force value is not inconsistent, control pressure-reducing valve adjustment openings of sizes is simultaneously alarmed.
In the present embodiment, preset pressure value 1.2MPa.a.
Specifically, referring to Fig. 2, it is provided between the auxiliary steam pipeline 302 of the first isolating valve 301 and first for will
First drain water piping 3021 of caused hydrophobic discharge in pipeline, between the first isolating valve 301 and the first auxiliary steam pipeline 303
It is provided with for the first drain water piping 3021 of caused hydrophobic discharge in pipeline, the second isolating valve 303 and the second auxiliary to be steamed
It is provided between steam pipe road 304 for by the second drain water piping 3041 of caused hydrophobic discharge in pipeline, the first drain water piping
3021 and second drain water piping 3041 hydrophobic be discharged into what is collected in catch pit 601.
Specifically, emptying pump 602 is also associated with referring to Fig. 2, catch pit 601, for by drain discharge to conventional island waste liquid
Exhaust system 603 carries out subsequent treatment.
In the present embodiment, radioactive problem is there may be due to hydrophobic, so being provided with catch pit 601 and emptying pump
Hydrophobic transmit to conventional island discharging of waste liquid system 603 is carried out subsequent treatment by 602, avoids radioactive pollution.
Specifically, referring to Fig. 2, there is separation 305 on the second auxiliary steam pipeline 304, in the system of separation more than 305
Equipment is all arranged at conventional island factory building, and technique gallery is all distributed in system equipment of the separation below 305.
The embodiment of the present invention by simplify Auxiliary Steam device configuration, reduce system equipment investment and after
Continuous operation and maintenance expenses are used, and effectively reduce the frequency that comes into operation of nuclear power plant's donkey boiler, are improved from the angle of initial cost and operating cost
The overall economy of nuclear power plant；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
Embodiment two
It is auxiliary suitable for the nuclear power plant shown in embodiment one the invention provides a kind of processing method of nuclear power plant's auxiliary steam
Vapour system is helped, referring to Fig. 3, this method includes：
S1, reception simultaneously transmit main steam caused by nuclear power plant's secondary circuit；
S2, be converted to auxiliary steam after main steam is depressurized；
S3, the auxiliary steam after conversion transmitted to unit user 40.
Specifically, include referring to Fig. 4, step S2：
S21, judge main steam isolation valve whether unlatching, according to off state, the closing of Synchronization Control pneumatic operated valve 201 or
Open；
In the present embodiment, the shut-in time of pneumatic operated valve 201 is less than 5 seconds, by controlling pneumatic operated valve 201 to isolate with main steam
The synchronization of valve, solving could be realized by more equipment such as STR oxygen-eliminating devices, steam converter and thin coolers in the prior art
, avoid the steam generator heat exchange tube of nuclear power plant from rupturing and cause shadow of the main steam radioactivity that may be present to auxiliary steam
Ring.
S22, preset pressure value is set, when pneumatic operated valve 201 is opened, is decompressed to main steam by pressure-reducing valve 202 default
Auxiliary steam needed for pressure value.
In the present embodiment, directly main steam is depressurized by pressure-reducing valve 202, saves steam conversion in the prior art
The step of, original 90.46% main steam is directly promoted to 100% to auxiliary steam conversion ratio, substantially increases production
Efficiency.
Specifically, include referring to Fig. 4, step S3：
S31, auxiliary steam is transferred to the unit user 401 by the first auxiliary steam pipeline 302；
S32, auxiliary steam is transferred to adjacent unit user 402 by the second auxiliary steam pipeline 304.
In the present embodiment, when only the unit user 401 needs to use auxiliary steam, the first isolating valve 301 is opened,
The second isolating valve 303 is closed, all auxiliary steams that steam transition components 20 export all are transmitted to the unit user 401；When
When only adjacent unit user 402 needs to use auxiliary steam, the second isolating valve 303 is opened, closes the first isolating valve 301, is steamed
All auxiliary steams that vapour transition components 20 export all are transmitted to adjacent unit user 402；As the unit user 401 and adjacent
When unit user 402 is required for using auxiliary steam, the first isolating valve 301 and the second isolating valve 302 are opened simultaneously, steam conversion
The auxiliary steam that component 20 exports fifty-fifty is transmitted to the unit user 401 and adjacent unit user 401.
Specifically, also include referring to Fig. 4, step S2：
The actual pressure value that S23, measurement pressure-reducing valve 202 export, and judge whether it is consistent with preset pressure value；
S24, when outlet pressure and the preset pressure value of pressure-reducing valve 202 are not inconsistent, alarm and control pressure-reducing valve to adjust
Openings of sizes.
In the present embodiment, preset pressure value 1.2MPa.a.
In the present embodiment, the outlet pressure of pressure-reducing valve 202 is measured by control assembly 50, is preset when outlet pressure is more than
During pressure value, alarm and control the opening of pressure-reducing valve 202 to diminish, reduce outlet pressure；When outlet pressure is less than preset pressure value
When, alarm and control the opening of pressure-reducing valve 202 to become big, increase outlet pressure, so that the outlet pressure control of pressure-reducing valve 202 exists
1.2MPa.a。
Specifically, also include referring to Fig. 4, step S3：
S33, by caused in the first auxiliary steam pipeline hydrophobic conventional island discharging of waste liquid is discharged into by the first drain water piping
System carries out subsequent treatment；
S34, by caused in the second auxiliary steam pipeline 304 hydrophobic catch pit is discharged into by the second drain water piping 3041
601；
S35, drain discharge to conventional island discharging of waste liquid system 603 carried out by subsequent treatment by emptying pump 602.
The embodiment of the present invention by simplify Auxiliary Steam device configuration, reduce system equipment investment and after
Continuous operation and maintenance expenses are used, and effectively reduce the frequency that comes into operation of nuclear power plant's donkey boiler, are improved from the angle of initial cost and operating cost
The overall economy of nuclear power plant；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
Embodiment three
The embodiments of the invention provide a kind of nuclear power plant's Auxiliary Steam, and referring to Fig. 5, the system includes steam conversion group
Part 20, auxiliary steam pipeline component 30 and unit user 40, wherein auxiliary steam pipeline component 30 and unit user 40 are with implementing
Identical in Fig. 2 of example one, difference is, the Auxiliary Steam of the present embodiment also includes：
Steam turbine 70, it is connected between main steam line 10 and pneumatic operated valve 201, turns for main steam to be drawn gas by six grades
It is changed to moist steam；
Steam-water separation case 203, it is connected between pneumatic operated valve 201 and pressure-reducing valve 202, for being dehumidified to moist steam, and
Main steam after dehumidifying is transmitted to pressure-reducing valve 202.
In the present embodiment, it is 2MPa.a that main steam, which becomes pressure, after six grades of steam turbine draw gas, and humidity is about
10% moist steam, it is therefore desirable to dehumidified by steam-water separation case 203 to main steam.
Auxiliary steam pipeline component also includes the 3rd drain water piping 3022, the input connection vapour of the 3rd drain water piping 3022
Water separating tank 203, the output end of the 3rd drain water piping 3022 connect the first drain water piping 3021, for by steam-water separation case 203
In caused hydrophobic discharge.
The embodiment of the present invention by simplify Auxiliary Steam device configuration, reduce system equipment investment and after
Continuous operation and maintenance expenses are used, and effectively reduce the frequency that comes into operation of nuclear power plant's donkey boiler, are improved from the angle of initial cost and operating cost
The overall economy of nuclear power plant；Solve the problems, such as the radioactive shield that possibility occurs, realize radioactive inclusive design.
Example IV
It is auxiliary suitable for the nuclear power plant shown in embodiment three the invention provides a kind of processing method of nuclear power plant's auxiliary steam
Vapour system is helped, referring to Fig. 6, this method includes：
S1, reception simultaneously transmit main steam caused by nuclear power plant's secondary circuit；
S2, be converted to auxiliary steam after main steam is depressurized；
S3, the auxiliary steam after conversion transmitted to unit user 40.
Wherein identical with Fig. 3 of embodiment two step by step, its difference is, in the method for the present embodiment before step S21
Also include：
S25, main steam is drawn gas by six grades by steam turbine 70 is converted to moist steam；
Also include before step S22：
S26, by steam-water separation case 203 moist steam is dehumidified, and the main steam after dehumidifying is transmitted to pressure-reducing valve
202。
In the present embodiment, employ and carry out six grades by steam turbine 70 and draw gas mode and returned to receive and collect nuclear power plant two
Main steam caused by road；It is 2MPa.a that main steam, which becomes pressure, after being drawn gas due to six grades, the moist steam that humidity is about 10%, therefore
Add steam-water separation case 203 to dehumidify to moist steam, then the main steam after dehumidifying is depressurized by pressure-reducing valve 202
Processing, obtain the auxiliary steam that pressure is 1.2MPa.a.
Also include before step S33：
S36, by hydrophobic caused by steam-water separation case 203 the first drain water piping is discharged into by the 3rd drain water piping 3022
3021。
In the present embodiment, can be produced when being dehumidified to main steam may be with active for steam-water separation case 203
It is hydrophobic, the first drain water piping 3021 is discharged into by hydrophobic by the 3rd drain water piping 3022；In the first auxiliary steam pipeline 302 and
During auxiliary steam is transmitted separately to the unit user 401 and adjacent unit user 402 by two auxiliary steam pipelines 304,
Also can produce may be with active hydrophobic；Wherein, the second drain water piping 3041 is located at the technique gallery outside conventional island factory building,
Therefore the transmission by catch pit 601 and emptying pump 602, final first drain water piping 3021, the second drain water piping are also needed to
3041 and the 3rd the hydrophobic conventional island discharging of waste liquid system that is all discharged into caused by drain water piping 3022 carry out subsequent treatment, avoid causing
Radiocontamination.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
It should be noted that：Nuclear power plant's Auxiliary Steam that above-described embodiment provides is realizing nuclear power plant's auxiliary steam
, can as needed will be upper only with the division progress of above-mentioned each functional module for example, in practical application during processing method
State function distribution to be completed by different functional modules, i.e., the internal structure of equipment is divided into different functional modules, to complete
All or part of function described above.In addition, a kind of nuclear power plant's auxiliary steam and nuclear power plant that above-described embodiment provides are auxiliary
The processing method embodiment of steam is helped to belong to same design, its specific implementation process refers to embodiment of the method, repeats no more here.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (18)
1. a kind of nuclear power plant's Auxiliary Steam, it is characterised in that the system includes：
Main steam line, connection nuclear power plant secondary circuit, for transmitting main steam caused by secondary circuit；
Steam transition components, the main steam line is connected, for being converted to auxiliary steam after main steam is depressurized；It is described
Steam transition components include the pneumatic operated valve being connected with main steam line, for keeping the synchronous regime with main steam isolation valve；
At least auxiliary steam pipeline component all the way, connects the steam transition components, for the auxiliary steam after conversion to be transmitted
To unit user.
2. system according to claim 1, it is characterised in that the auxiliary steam pipeline component includes parallel arrangement of the
One auxiliary steam pipeline component and the second auxiliary steam pipeline component,
First auxiliary steam pipeline component includes the first isolating valve and the first auxiliary steam pipeline, the second auxiliary steam pipeline component
Including the second isolating valve and the second auxiliary steam pipeline, the input of first isolating valve and the second isolating valve is commonly connected to
The output end of the steam transition components, the output end of first isolating valve and the second isolating valve be connected respectively to for
Auxiliary steam is transferred to the first auxiliary steam pipeline of the unit user and used for auxiliary steam to be transferred into adjacent unit
The second auxiliary steam pipeline at family.
3. system according to claim 2, it is characterised in that the steam transition components also include connecting with the pneumatic operated valve
What is connect is used to main steam being decompressed to the pressure-reducing valve of the auxiliary steam needed for preset pressure value.
4. system according to claim 3, it is characterised in that the pneumatic operated valve closes simultaneously when main steam line closes
Close, the pneumatic valve closing time is less than 5 seconds.
5. system according to claim 3, it is characterised in that the Auxiliary Steam also includes：
Control assembly, the pneumatic operated valve and pressure-reducing valve is connected respectively, for judging the off state of main steam isolation valve, according to pass
Disconnected state, pneumatic operated valve turns off or on described in Synchronization Control.
6. system according to claim 5, it is characterised in that the Auxiliary Steam also includes：
Pressure measuring instrument, it is connected between the pressure-reducing valve and the first isolating valve, the second isolating valve and connects the control assembly,
For measuring the actual pressure value of decompression valve outlet and transmitting the actual pressure value to the control assembly；
The control assembly is additionally operable to set the preset pressure value, and receives the actual pressure value, when the actual pressure
When value is not inconsistent with the preset pressure value, controls the pressure-reducing valve adjustment openings of sizes and alarm.
7. system according to claim 3, it is characterised in that the preset pressure value is 1.2MPa.a.
8. system according to claim 2, it is characterised in that between first isolating valve and the first auxiliary steam pipeline
It is provided with for by the first drain water piping of caused hydrophobic discharge in pipeline, second isolating valve and the second air vent pipework
It is provided between road for the second drain water piping of caused hydrophobic discharge in pipeline, first drain water piping and second to be dredged
Waterpipe hydrophobic is discharged into what is collected in catch pit.
9. system according to claim 8, it is characterised in that the catch pit is also associated with emptying pump, for will be hydrophobic
It is emitted into conventional island discharging of waste liquid system and carries out subsequent treatment.
10. system according to claim 3, it is characterised in that the Auxiliary Steam also includes：
Steam turbine, be connected between the main steam line and pneumatic operated valve, for main steam is drawn gas by six grades be converted to it is wet
Steam；
Steam-water separation case, it is connected between the pneumatic operated valve and pressure-reducing valve, for being dehumidified to the moist steam, and will dehumidifying
Main steam afterwards is transmitted to the pressure-reducing valve.
11. system according to claim 10, it is characterised in that first isolating valve and the first auxiliary steam pipeline it
Between be provided with for by the first drain water piping of caused hydrophobic discharge in pipeline, the auxiliary steam pipeline component also includes the
Three drain water pipings, the input of the 3rd drain water piping connect the steam-water separation case, the output of the 3rd drain water piping
End connects first drain water piping, for by caused hydrophobic discharge in the steam-water separation case.
12. one kind is using any nuclear power plant's Auxiliary Steam processing nuclear power plant auxiliary steams of claim 3-7,10-11
Method, it is characterised in that methods described includes：
S1, reception simultaneously transmit main steam caused by nuclear power plant's secondary circuit；
S2, control pneumatic operated valve and main steam isolation valve keep synchronous regime, and when the pneumatic operated valve is opened, main steam is carried out
Auxiliary steam is converted to after decompression；
S3, the auxiliary steam after conversion transmitted to unit user.
13. according to the method for claim 12, it is characterised in that the step S2 includes：
S21, judge whether main steam isolation valve is opened, according to off state, pneumatic operated valve turns off or on described in Synchronization Control；
S22, preset pressure value is set, when the pneumatic operated valve is opened, main steam is decompressed to by preset pressure value by pressure-reducing valve
Required auxiliary steam.
14. according to the method for claim 12, it is characterised in that the step S3 includes：
S31, auxiliary steam is transferred to the unit user by the first auxiliary steam pipeline；
S32, auxiliary steam is transferred to adjacent unit user by the second auxiliary steam pipeline.
15. according to the method for claim 13, it is characterised in that the step S2 also includes：
S23, measurement decompression valve outlet actual pressure value, and judge whether it is consistent with preset pressure value；
S24, when the actual pressure value and the preset pressure value are not inconsistent, alarm and control the pressure-reducing valve adjustment opening big
It is small.
16. according to the method for claim 14, it is characterised in that the step S3 also includes：
S33, by caused in the first auxiliary steam pipeline hydrophobic conventional island discharging of waste liquid system is discharged into by the first drain water piping
Subsequent treatment is carried out, first drain water piping is arranged between the first isolating valve and the first auxiliary steam pipeline；
S34, by the second auxiliary steam pipeline it is caused it is hydrophobic catch pit is discharged into by the second drain water piping, described second is hydrophobic
Pipeline is arranged between the second isolating valve and the second auxiliary steam pipeline；
S35, by emptying pump by drain discharge to conventional island discharging of waste liquid system carry out subsequent treatment.
17. according to the method for claim 13, it is characterised in that also include before the step S21：
S25, main steam is drawn gas by six grades by steam turbine is converted to moist steam；
Also include before the step S22：
S26, by steam-water separation case the moist steam is dehumidified, the main steam after by dehumidifying is transmitted to the decompression
Valve.
18. according to the method for claim 16, it is characterised in that also include before the step S33：
S36, by hydrophobic caused by steam-water separation case the first drain water piping, the steam-water separation case are discharged into by the 3rd drain water piping
It is connected between the pneumatic operated valve and pressure-reducing valve.
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| CN107939462B (en) * | 2017-12-21 | 2020-02-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Start-stop system and control method thereof, and secondary loop steam-water system and operation method of nuclear power station |
| CN110155296A (en) * | 2019-04-03 | 2019-08-23 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform auxiliary steam converting system |
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