CN106677844A - Nuclear energy and conventional energy serial-parallel coupling power generation system - Google Patents

Nuclear energy and conventional energy serial-parallel coupling power generation system Download PDF

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Publication number
CN106677844A
CN106677844A CN201510758354.7A CN201510758354A CN106677844A CN 106677844 A CN106677844 A CN 106677844A CN 201510758354 A CN201510758354 A CN 201510758354A CN 106677844 A CN106677844 A CN 106677844A
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China
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heat exchanger
steam
heater
pressure
low
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CN106677844B (en
Inventor
林诚格
沈峰
李连荣
白宁
蒋慧静
张圣君
朱清源
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China Nuclear (beijing) Science And Technology Research Institute Co Ltd
State Nuclear Electric Power Planning Design and Research Institute Co Ltd
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China Nuclear (beijing) Science And Technology Research Institute Co Ltd
State Nuclear Electric Power Planning Design and Research Institute Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin

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Abstract

The invention discloses a nuclear energy and conventional energy serial-parallel coupling power generation system. The system comprises a steam turbine generator unit, a first heat exchanger, a second heat exchanger, a nuclear reactor and a heating device, wherein the steam turbine generator unit comprises a steam turbine and a generator; the steam turbine is connected with the generator and drives the generator to generate electricity; the first heat exchanger and the second heat exchanger are arranged in parallel and are connected with the steam turbine generator unit correspondingly; the nuclear reactor is connected with the first heat exchanger and the second heat exchanger; heat generated by the nuclear reactor heats return water coming from the steam turbine generator unit; the heating device is connected with the first heat exchanger, the second heat exchanger and the steam turbine generator unit and used for heating steam coming from the first heat exchanger and the second heat exchanger through a conventional energy source and then supplying the heated steam to the steam turbine generator unit; and part of extraction steam of the steam turbine generator unit and heated return water discharged out of the first heat exchanger go into the heating device together.

Description

The connection in series-parallel coupled electricity-generation system of nuclear energy and conventional energy resource
Technical field
The present invention relates to nuclear energy applied technical field and conventional energy resource applied technical field, in particular it relates to a kind of nuclear energy with it is normal The connection in series-parallel coupled electricity-generation system of the rule energy.
Background technology
Small reactor has high security, integration, modularization, multiduty feature.The at present research and development of small-sized heap into For the focus of nuclear power field in the world, it has been not less than international advanced three generations's nuclear power skill at present in advanced and security Art is required.But economy is a restrictive factor for restricting rickle marketing application.Conventional electric power unit is due to can be with Using the steam of higher quality, efficiency can reach more than 45%, such as ultra supercritical conventional motor group main steam temperature can be with 600 DEG C are reached, efficiency can reach 49% even more high.
Thermal power generation is the main source of current conventional electric power supply, and corresponding machine set technology is ripe, and the thermal efficiency is higher.But mesh Front thermal power generation often relies on coal, is generated electricity by burning coal, and coal consumption amount is big, seriously polluted.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent.
For this purpose, the present invention proposes the connection in series-parallel coupled electricity-generation system of a kind of nuclear energy and conventional energy resource, the system effectiveness is high, pollution It is few.
The connection in series-parallel coupled electricity-generation system of nuclear energy Yu conventional energy resource according to embodiments of the present invention, including:Turbo-generator Set, The Turbo-generator Set includes steam turbine and generator, and the steam turbine is connected with the generator and drives the generator Generate electricity;First Heat Exchanger and the second heat exchanger, the First Heat Exchanger and the second heat exchanger be arranged in parallel and respectively with the vapour Turbine generator group is connected;Nuclear reactor, the nuclear reactor is connected respectively with the First Heat Exchanger and the second heat exchanger, institute The steam for stating nuclear reactor generation is returned by the First Heat Exchanger and the second heat exchanger to coming from the Turbo-generator Set Water is heated;And heater, the heater and the First Heat Exchanger, the second heat exchanger and the Turbo-generator Set It is connected, it is described for being supplied to after conventional energy resource heats the steam for coming from the First Heat Exchanger and the second heat exchanger Turbo-generator Set a, part for the Turbo-generator Set is drawn gas and enter together with the steam discharged from the First Heat Exchanger Enter the heater.
The connection in series-parallel coupled electricity-generation system of nuclear energy Yu conventional energy resource according to embodiments of the present invention, using First Heat Exchanger and second Working medium of the heat exchanger respectively to flowing out from Turbo-generator Set is heated, and First Heat Exchanger and the second heat exchanger respectively with Nuclear reactor is connected, by the assignment of traffic for adjusting the working medium that Turbo-generator Set flows out, it is possible to achieve nuclear energy and conventional energy resource Different power accountings, engineering can easily be accommodated, and can make full use of nuclear energy provide heat, improve reactor efficiency and The efficiency of coupled system so as to have more preferable economy, with bigger application space, and reduces energy resource consumption, reduces Pollution.
In addition, the connection in series-parallel coupled electricity-generation system of nuclear energy Yu conventional energy resource according to embodiments of the present invention, can also have as follows Additional technical characteristic:
According to one embodiment of present invention, the steam turbine includes high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, the heater With the first steam inlet, the second steam inlet, the first steam (vapor) outlet and the second steam (vapor) outlet, the air intake of the high pressure cylinder It is connected with the first steam (vapor) outlet of the heater, the extraction opening of the high pressure cylinder enters with the first steam of the heater Mouth is connected, and the air intake of medium pressure cylinder is connected with the second steam (vapor) outlet of the heater, the steam drain of medium pressure cylinder It is connected with the air intake of the low pressure (LP) cylinder.
According to one embodiment of present invention, the Turbo-generator Set also includes being connected to the steam drain of the low pressure (LP) cylinder in turn With the condenser between the First Heat Exchanger and the second heat exchanger, condensate pump, hydrophobic heat exchanger, low-pressure heater, remove Oxygen device and feed pump, the First Heat Exchanger is connected between the feed pump and the first steam inlet of the heater, Second heat exchanger is connected between the feed pump and the second steam inlet of the heater.
According to one embodiment of present invention, the low pressure (LP) cylinder also has extraction opening, and the extraction opening of the low pressure (LP) cylinder is low with described Pressure heater is connected to heat the condensate entered into the low-pressure heater from the condenser.
According to one embodiment of present invention, the low-pressure heater includes first to fourth grade of low-pressure heater being one another in series.
According to one embodiment of present invention, discharge from the first order low-pressure heater and the second level low-pressure heater Being drawn gas for low pressure (LP) cylinder returned in the condenser after the hydrophobic heat exchanger, is discharged from the third level low-pressure heater Low pressure (LP) cylinder draw gas into from the third level low-pressure heater discharge backwater in, from the fourth stage low-pressure heater row The drawing gas of the low pressure (LP) cylinder for going out enter into the third level low-pressure heater after the backwater of the heating third level low-pressure heater with Drawing gas for the low pressure (LP) cylinder discharged from the third level low-pressure heater is entered together from returning that the third level low-pressure heater is discharged In water.
According to one embodiment of present invention, the feed pump drives turbine to drive by feed pump, and the feed pump drives turbine Working medium be to come from drawing gas for medium pressure cylinder.
According to one embodiment of present invention, the heater is coal-burning boiler, oil burning boiler or gas fired-boiler.
According to one embodiment of present invention, the nuclear reactor is small-sized heap of the thermal power less than 1000MW.
According to one embodiment of present invention, the steam of the outlet of the First Heat Exchanger or the second heat exchanger includes saturation dry blowing Vapour, saturation moist steam and superheated steam.
According to one embodiment of present invention, the steaming flowed out from first steam (vapor) outlet or the second steam (vapor) outlet of the heater The temperature of vapour is 500 DEG C -660 DEG C.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will from the following description become bright It is aobvious, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will be apparent from from the description with reference to accompanying drawings below to embodiment With it is easy to understand, wherein:
Fig. 1 is the structural representation of the connection in series-parallel coupled electricity-generation system of nuclear energy Yu conventional energy resource according to embodiments of the present invention.
Reference:
Electricity generation system 100;
First Heat Exchanger 10;Second heat exchanger 11;Nuclear reactor 20;
Heater 30;First steam inlet 31;Second steam inlet 32;First steam (vapor) outlet 33;Second steam (vapor) outlet 34;
Steam turbine 40;Intermediate pressure cylinder 41;Low pressure (LP) cylinder 42;High pressure cylinder 43;
Generator 50;Condenser 60;
Condensate pump 61;Hydrophobic heat exchanger 62;Low-pressure heater 63;
First order low-pressure heater 631;Second level low-pressure heater 632;Third level low-pressure heater 633;Fourth stage low pressure Heater 634;
Oxygen-eliminating device 70;Feed pump 80;Feed pump drives turbine 90.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from start to finish Or similar label represents same or similar element or the element with same or like function.Retouch below with reference to accompanying drawing The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The connection in series-parallel coupled electricity-generation system of nuclear energy Yu conventional energy resource according to embodiments of the present invention is specifically described below in conjunction with the accompanying drawings 100。
As shown in figure 1, the connection in series-parallel coupled electricity-generation system 100 of nuclear energy Yu conventional energy resource according to embodiments of the present invention includes vapour Turbine generator group, the heat exchanger 11 of First Heat Exchanger 10 and second, nuclear reactor 20 and heater 30.
Specifically, Turbo-generator Set includes steam turbine 40 and generator 50, and steam turbine 40 is connected and drives with generator 50 Dynamic generator 50 generates electricity, and the heat exchanger 11 of First Heat Exchanger 10 and second is arranged in parallel and is connected with Turbo-generator Set respectively. Nuclear reactor 20 is connected respectively with the heat exchanger 11 of First Heat Exchanger 10 and second, and the steam that nuclear reactor 20 is produced is by the The backwater heating that one heat exchanger 10 and 11 pairs, the second heat exchanger come from Turbo-generator Set.
Heater 30 is connected with First Heat Exchanger 10, the second heat exchanger 11 and Turbo-generator Set, for by conventional energy Source is supplied to Turbo-generator Set, turbine generator after the steam for coming from the heat exchanger 11 of First Heat Exchanger 10 and second is heated A part for unit to be drawn gas and enter heater 30 together with the heated backwater discharged from First Heat Exchanger 10.
Wherein, heater 30 produces steam, and steam turbine 40 is connected with heater 30 and generator 50 and drives generating Machine 50 generates electricity, and the heat exchanger 11 of First Heat Exchanger 10 and second is located between the steam drain of steam turbine 40 and heater 30, Nuclear reactor 20 is connected and to through the heat exchanger of First Heat Exchanger 10 and second with the heat exchanger 11 of First Heat Exchanger 10 and second 11 working medium is heated.
In other words, electricity generation system 100 according to embodiments of the present invention is main by Turbo-generator Set, First Heat Exchanger 10 and the Two heat exchangers 11, nuclear reactor 20 and heater 30 are constituted, wherein, Turbo-generator Set can be commonly used in the art Generating set.In this application, Turbo-generator Set mainly includes steam turbine 40 and generator 50, and heater 30 is produced Steam, steam does work through the driving steam turbine 40 of steam turbine 40, and steam turbine 40 drives generator 50 to generate electricity.
The steam that heater 30 flows out flows back to heater 30 and is circulated utilization, Jing after the acting of steam turbine 40 The vapor (steam) temperature crossed after steam turbine 40 is reduced, and will not generally flow directly into heater 30, but needs to steam the part Vapour is condensed, heats and flow back to heater 30 again afterwards.In this application, a part of steam for flowing out from steam turbine 40 Enter after condensation after 10 and second heat exchanger of First Heat Exchanger 11 that is connected with nuclear reactor 20 heats, then flow back to and add Thermal 30, the heat heated to backwater in the heat exchanger 11 of First Heat Exchanger 10 and second comes from nuclear reactor 20, I.e. using nuclear reactor 20 and the coupling scheme of general energy system, it is possible to use general energy system obtains higher secondary circuit Temperature of Working is improving the economy of reactor.
In addition, the part flowed out from steam turbine 40 is drawn gas enter heating together with the steam discharged from First Heat Exchanger 10 Device 30, by adjust the part draw gas and flow through the heat exchanger 11 of First Heat Exchanger 10 and second working medium flow, can To realize the power accounting of nuclear energy and conventional energy resource so that system can easily be accommodated.
In this application, heated using 20 pairs of backwater flowed out from steam turbine 40 of nuclear reactor, substituted using nuclear energy normal A part for the rule energy, and nuclear energy is in the entire system, and accounting for the ratio of all energy can carry out reasonable adjusting, so as to can With the heat for making full use of nuclear fuel to produce, the use of conventional energy resource is reduced, the effect of energy-saving and emission-reduction can be reached, improve Jing Ji benefit.
Thus, the connection in series-parallel coupled electricity-generation system 100 of nuclear energy Yu conventional energy resource according to embodiments of the present invention, using the first heat exchange Working medium of the heat exchanger 11 of device 10 and second respectively to flowing out from Turbo-generator Set is heated, and the He of First Heat Exchanger 10 Second heat exchanger 11 is connected respectively with nuclear reactor 20, by the assignment of traffic for adjusting the working medium that Turbo-generator Set flows out, The nuclear energy power accounting different with conventional energy resource can be realized, engineering can easily be accommodated, and can make full use of what nuclear energy was provided Heat, improves the efficiency of reactor efficiency and coupled system so as to have more preferable economy, with bigger application space, And energy resource consumption is reduced, pollution is reduced.
According to one embodiment of present invention, steam turbine 40 includes high pressure cylinder 43, intermediate pressure cylinder 41 and low pressure (LP) cylinder 42, plus hot charging Put 30 and there is the first steam inlet 31, the second steam inlet 32, the first steam (vapor) outlet 33 and the second steam (vapor) outlet 34, it is high The air intake of cylinder pressure 43 is connected with the first steam (vapor) outlet 33 of heater 30, the extraction opening and heater of high pressure cylinder 43 30 the first steam inlet 31 is connected, and the air intake of intermediate pressure cylinder 41 is connected with the second steam (vapor) outlet 34 of heater 30, The steam drain of intermediate pressure cylinder 41 is connected with the air intake of low pressure (LP) cylinder 42.
That is, the steam turbine 40 of electricity generation system 100 according to embodiments of the present invention is main by high pressure cylinder 43, intermediate pressure cylinder 41 and low pressure (LP) cylinder 42 constitute, heater 30 then has two steam inlets and two steam (vapor) outlets, i.e. the first steam inlet 31st, the second steam inlet 32, the first steam (vapor) outlet 33 and the second steam (vapor) outlet 34.
Wherein, high pressure cylinder 43 has air intake and extraction opening, the air intake of high pressure cylinder 43 and the first steam of heater 30 Outlet 33 be connected, the extraction opening of high pressure cylinder 43 is connected with the first steam inlet 31, the air intake of intermediate pressure cylinder 41 and add hot charging Put 30 another steam (vapor) outlet i.e. the second steam (vapor) outlet 34 to be connected, the steam drain of intermediate pressure cylinder 41 enters vapour with low pressure (LP) cylinder 42 Mouth is connected.
Further, in certain specific embodiments of the invention, Turbo-generator Set also includes being connected to low pressure (LP) cylinder in turn Condenser 60, condensate pump 61, hydrophobic heat exchange between 42 steam drain and the heat exchanger 11 of First Heat Exchanger 10 and second Device 62, low-pressure heater 63, oxygen-eliminating device 70 and feed pump 80, First Heat Exchanger 10 is connected to feed pump 80 and adds hot charging Put between 30 the first steam inlet 31, the second heat exchanger 11 is connected to feed pump and enters with the second steam of heater 30 Between mouth 32.
Specifically, as shown in figure 1, in this application, the parallel connection of 10 and second heat exchanger of First Heat Exchanger 11 is located at feed pump Between 80 and heater 30, wherein, First Heat Exchanger 10 is located at feed pump 80 and enters with the first steam of heater 30 Between mouth 31, and the second heat exchanger 11 is located between feed pump and the second steam inlet 32 of heater 30.
According to one embodiment of present invention, low pressure (LP) cylinder 42 also has extraction opening, the extraction opening and low-pressure heating of low pressure (LP) cylinder 42 Device is connected to heat the condensate entered into low-pressure heater 63 from condenser 60.Preferably, low-pressure heater 63 includes First order low-pressure heater 631, second level low-pressure heater 632, the third level low-pressure heater 633 and the 4th being one another in series Level low-pressure heater 634.
Further, the low pressure (LP) cylinder 42 discharged from first order low-pressure heater 631 and second level low-pressure heater 632 draws gas By returning to after hydrophobic heat exchanger 62 in condenser 60, the low pressure (LP) cylinder 42 discharged from third level low-pressure heater 633 is taken out Vapour is entered in the backwater discharged from third level low-pressure heater 633, from the low pressure (LP) cylinder 42 that fourth stage low-pressure heater 634 is discharged Draw gas enter into it is low with from the third level after the backwater of heating third level low-pressure heater 633 in third level low-pressure heater 633 Drawing gas for the low pressure (LP) cylinder 42 that pressure heater 633 is discharged is entered together in the backwater discharged from third level low-pressure heater 633.
Thus, low-pressure heater 63 according to embodiments of the present invention can fill to the condensed water flowed out from condensate pump 61 The preheating for dividing.
According to one embodiment of present invention, feed pump 80 drives turbine 90 to drive by feed pump, and feed pump drives turbine 90 Working medium be to come from drawing gas for intermediate pressure cylinder 41.
That is, in this application, for the water pump in oxygen-eliminating device 70 to be delivered into the heat exchanger of First Heat Exchanger 10 and second The power of 11 feed pump 80 comes from feed pump and drives turbine 90, and feed pump drives the working medium of turbine 90 then to come from Intermediate pressure cylinder 41 draws gas.
Specifically, the water after deoxygenation pressurizes via feed pump 80, improves and enter after pressure what is be connected with nuclear reactor 20 The heat exchanger 11 of First Heat Exchanger 10 and second, water Jing nuclear reactors 20 in the heat exchanger 11 of First Heat Exchanger 10 and second Heat becomes saturated vapor or superheated steam.Thus, it is possible in raising system working medium pressure, so as to improve whole system The efficiency of system, and the operating of feed pump 80 is capable of achieving by drawing gas for intermediate pressure cylinder 41, it is possible to reduce energy resource consumption, drop Low operating cost.
In certain specific embodiments of the invention, Turbo-generator Set be mesolow generating set, High-voltage generator set, One kind in supervoltage generator group, subcritical generating set, supercritical generating sets or ultra supercritical unit.I.e. originally Turbo-generator Set used in application includes mesolow generating set, High-voltage generator set, supervoltage generator group, Asia Critical generating set, supercritical generating sets, ultra supercritical unit and not limited to this.
Further, in this application, the heat-supplying mode of the conventional energy resource for being heated to heater 30 includes:Directly add Thermal reactor secondary circuit working medium, high-quality working medium mix with reactor secondary circuit.Specifically, in the present invention some are concrete In embodiment, heater 30 is coal-burning boiler, oil burning boiler or gas fired-boiler.
Thus, the range of choice of heater 30 according to embodiments of the present invention is wider, and heating working medium can be coal, it is also possible to It is natural gas or other biomass energies.
According to one embodiment of present invention, nuclear reactor 20 is small-sized heap of the thermal power less than 1000MW.That is, Electricity generation system 100 according to embodiments of the present invention is applied to small-sized heap of the heat output of reactor less than 1000MW.
In certain specific embodiments of the invention, the steam of the outlet of the heat exchanger 11 of First Heat Exchanger 10 or second includes Saturation dry saturated steam, saturation moist steam and superheated steam.Specifically, the outlet of the heat exchanger 11 of First Heat Exchanger 10 or second Steam can be the saturation dry saturated steam in 5-23MPa pressure limits, saturation moist steam, the 5-23MPa in 5-23MPa pressure limits Superheated steam of the various degrees of superheat in pressure limit etc. and not limited to this.
Thus, the heater 30 of the structure can reduce whole electricity generation system 100 to the heat exchange of First Heat Exchanger 10 and second The requirement of the steam quality of the outlet of device 11, can simplify reheat system after the heat exchanger steam-water separation being connected with reactor, enter One step simplied system structure, reduces cost.
In certain specific embodiments of the invention, from first steam (vapor) outlet 33 or the second steam (vapor) outlet of heater 30 The temperature of 34 steam for flowing out is 500 DEG C -660 DEG C.Thus, the steam of the temperature into Turbo-generator Set can obtain compared with High generating efficiency.
The workflow of electricity generation system 100 according to embodiments of the present invention is detailed below.
Operationally, heater 30 produces steam to electricity generation system 100 according to embodiments of the present invention, and a part of steam is from the One steam (vapor) outlet 33 flows out, and the high pressure cylinder 43 into steam turbine 40 drives generator 50 to generate electricity, and the reheating of high pressure cylinder 43 is taken out Steam flow returns the first steam inlet 31 of heater 30.Another part steam flows out from the second steam (vapor) outlet 34, into steamer The intermediate pressure cylinder 41 of machine 40 and low pressure (LP) cylinder 42 drive generator 50 to generate electricity, and the steam discharged from the steam drain of low pressure (LP) cylinder 42 is successively Into condenser 60, condensate pump 61, hydrophobic heat exchanger 62 and low-pressure heater 63, the extraction opening 421 of low pressure (LP) cylinder 42 It is connected and heats the condensate entered into low-pressure heater 63 from condenser 60 with low-pressure heater 63.
Wherein, the drawing gas for low pressure (LP) cylinder 42 discharged from first order low-pressure heater 631 and second level low-pressure heater 632 passes through Return to after hydrophobic heat exchanger 62 in condenser 60, from third level low-pressure heater 633 discharge low pressure (LP) cylinder 42 draw gas into In entering the backwater discharged from third level low-pressure heater 633, the low pressure (LP) cylinder 42 discharged from fourth stage low-pressure heater 634 is taken out Vapour enter into third level low-pressure heater 633 after the backwater of heating third level low-pressure heater 633 with add from third level low pressure Drawing gas for the low pressure (LP) cylinder 42 that hot device 633 is discharged is entered together in the backwater discharged from third level low-pressure heater 633.
The deoxygenation of oxygen-eliminating device 70 is flowed through through the backwater of level Four low-pressure heater heating, is then pressurizeed by feed pump 80, backwater Heat in the heat exchanger 11 of First Heat Exchanger 10 and second that inflow is connected with nuclear reactor 20, wherein, through First Heat Exchanger Steam after 10 heating mix with drawing gas of flowing out from high pressure cylinder 43 after from the first steam inlet 31 into heater 30, Jing The steam for crossing the heating of the second heat exchanger 11 then enters heater 30 from the second steam inlet 32, is circulated utilization.
That is, in this application, the steam discharge of steam turbine 40 enters condenser 60, and the condensate of the outlet of condenser 60 enters Enter condensate pump 61, the feedwater of the outlet of condensate pump 61 is via hydrophobic heat exchanger 62 (by the hydrophobic heating of low-pressure heater 63) And after level Four low-pressure heater heating (being heated by the level Four regenerative steam of low-pressure heater 63), it is (mixed into oxygen-eliminating device 70 Box-like heater, is heated by the regenerative steam of middle pressure heater, and deoxygenation) after, pressurizeed by feed pump 80, respectively enter The heat exchanger 11 of First Heat Exchanger 10 and second being connected with reactor.
Wherein, part feedwater becomes saturation water after heating via the First Heat Exchanger 10 being connected with reactor, then is given by another Water pump is unsaturated water after further pressurizeing, and supercritical steam or ultra supercritical steam are heated to be into boiler, is entered afterwards The high pressure cylinder 43 of steam turbine 40 does work (driving electrical power generators), and the steam discharge of high pressure cylinder 43 enters the intermediate pressure cylinder of steam turbine 40 41 continue to do work, and the reheated steam of high pressure cylinder 43 is entered after cold section of heating of reheating of boiler, and steamer is entered after reheated hot arc The intermediate pressure cylinder 41 of machine 40 does work, and the steam discharge of intermediate pressure cylinder 41 does work into the low pressure (LP) cylinder 42 of steam turbine 40, steam turbine after acting 40 steam discharge enters condenser 60, completes cyclic process.
Another part feeds water after the second heat exchanger 11 being connected via reactor is heated becomes saturated vapor or superheated steam, with height The intermediate pressure cylinder 41 of steam turbine 40, the acting of low pressure (LP) cylinder 42 are sequentially entered after the 43 reheated steams mixing of cylinder pressure and drives generator 50 Generate electricity, the steam discharge of steam turbine 40 enters condenser after acting, completes cyclic process.
In this application, the heat that nuclear reactor 20 is produced using fuel fission, by two heat exchangers secondary circuits feedwater is heated, There are two feed pumps in whole coupled electricity-generation system, there is provided different feed pressures, after reacted heap heating of feeding water saturation is become Steam or superheated steam, into the hot side again of boiler after mixing with the reheated steam of high pressure cylinder, in addition, steam turbine high-pressure cylinder stream The distribution of amount and again heat flow by being adjusted, and then can adjust the power accounting of nuclear energy and conventional energy resource.
Electricity generation system of the invention 100 is described with reference to specific embodiment.
Embodiment 1
As shown in figure 1, the heater 30 of electricity generation system 100 according to embodiments of the present invention adopts boiler, steam turbine 40 Including high pressure cylinder 43, intermediate pressure cylinder 41 and low pressure (LP) cylinder 42, boiler has two steam inlets and two steam (vapor) outlets, high pressure cylinder 43 air intake is connected with boiler steam (vapor) outlet, and the extraction opening of high pressure cylinder 43 is connected with boiler steam inlet. Intermediate pressure cylinder 41 is connected with another steam (vapor) outlet of boiler, and low pressure (LP) cylinder 42 is connected with intermediate pressure cylinder 41 and generator 50.Low pressure (LP) cylinder 42 outlet is connected with condenser 60 and oxygen-eliminating device 70, and feed pump 80 is located at oxygen-eliminating device 70 and changes with First Heat Exchanger 10 and second Between hot device 11, the heat exchanger 11 of First Heat Exchanger 10 and second respectively with feed pump 80 and two steam inlet phases of boiler Even.Nuclear reactor 20 is connected and to the heat exchanger of First Heat Exchanger 10 and second with the heat exchanger 11 of First Heat Exchanger 10 and second Steam or water in 11 is heated.
The cyclic process of a part of cycle fluid of electricity generation system 100 is:Boiler produces 500 DEG C of steam to 660 DEG C of scopes, The some vapor does work from a steam (vapor) outlet of boiler into high pressure cylinder 43, generator 50 is generated electricity, and high pressure cylinder 43 is taken out Steam flow back boiler, does manual work from another steam (vapor) outlet of boiler after reheating into intermediate pressure cylinder 41 and low pressure (LP) cylinder 42, drives and sends out Motor 50 generates electricity.
The steam discharge discharged from low pressure (LP) cylinder 42 sequentially passes through condenser 60, and (outlet feed pressure is about 0.005MPa, and temperature is at 30 DEG C Left and right), condensate pump 61 (provide condensate to the power demand of oxygen-eliminating device 70, pressure by low-pressure heater 63 pressure drop and The operating pressure of oxygen-eliminating device 70 is determined), hydrophobic heat exchanger 62, low-pressure heater 63 (feed temperature 30 DEG C to 150 DEG C it Between), oxygen-eliminating device 70 and feed pump 80, backwater is pumped to feed pump 80 the second heat exchanger 11 being connected with nuclear reactor 20, Boiler is pumped to by another pump housing (pressure is increased to the scope of 18MPa to 23MPa) after reheating, the part work is completed The cyclic process of matter.
The cyclic process of another part cycle fluid is:Boiler produce 500 DEG C of steam to 660 DEG C of scopes, some vapor from Another steam (vapor) outlet of boiler enters intermediate pressure cylinder 41 and low pressure (LP) cylinder 42 is done manual work, and drives generator 50 to generate electricity.
The steam discharge discharged from low pressure (LP) cylinder 42 sequentially passes through condenser 60, and (outlet feed pressure is about 0.005MPa, and temperature is at 30 DEG C Left and right), condensate pump 61 (provide condensate to the power demand of oxygen-eliminating device 70, pressure by low-pressure heater 63 pressure drop and The operating pressure of oxygen-eliminating device 70 is determined), hydrophobic heat exchanger 62, low-pressure heater 63 (feed temperature 30 DEG C to 150 DEG C it Between), oxygen-eliminating device 70 and feed pump 80, backwater is pumped to feed pump 80 First Heat Exchanger 10 being connected with nuclear reactor 20, Boiler is entered after mixing with drawing gas of extracting out from high pressure cylinder 43 after reheating, the cyclic process of the part working medium is completed.
In this application, the extra-supercritical unit (USC) of the reactor of 1000MW thermal powers and 1000MW is carried out calculating and is divided Analysis, on the premise of 1000MW power outputs are met, is calculated:Small-sized heap heat accounting is 45%, and the coupling of circulation is imitated Rate is 45.9%, and the efficiency of small-sized heap is 41%;Coal consumption is 170g/KWh, with former USC units (coal consumption is 280g/KWh) Compare decline 40% or so.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", the orientation or position relationship of the instruction such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, Be for only for ease of description the present invention and simplify description, rather than indicate or imply indication device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed Or implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or two More than, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " Should be interpreted broadly Deng term, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;Can Being to be mechanically connected, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be with It is the connection of two element internals.For the ordinary skill in the art, above-mentioned art can as the case may be understood Language concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score The first and second feature directly contacts can be included, it is also possible to be not directly contact including the first and second features but logical The other characterisation contact crossed between them.And, fisrt feature second feature " on ", " top " and " on Face " includes fisrt feature directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than the Two features.Fisrt feature second feature " under ", " lower section " and " below " include that fisrt feature is special second Directly over levying and oblique upper, or fisrt feature level height is merely representative of less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specific example ", Or the description of " some examples " etc. means to combine specific features, structure, material or feature that the embodiment or example are described In being contained at least one embodiment of the present invention or example.In this manual, the schematic representation of above-mentioned term is differed Surely identical embodiment or example are referred to.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary, It is not considered as limiting the invention, one of ordinary skill in the art is in the principle without departing from the present invention and the situation of objective Under above-described embodiment can be changed within the scope of the invention, change, replace and modification.

Claims (11)

1. the connection in series-parallel coupled electricity-generation system of a kind of nuclear energy and conventional energy resource, it is characterised in that include:
Turbo-generator Set, the Turbo-generator Set includes steam turbine and generator, the steam turbine and the generator phase Connect and drive the electrical power generators;
First Heat Exchanger and the second heat exchanger, the First Heat Exchanger and the second heat exchanger be arranged in parallel and respectively with the steamer Generating set is connected;
Nuclear reactor, the nuclear reactor is connected respectively with the First Heat Exchanger and the second heat exchanger, and the nuclear reactor is produced Raw steam is heated by the First Heat Exchanger and the second heat exchanger to the backwater for coming from the Turbo-generator Set;With
Heater, the heater is connected with the First Heat Exchanger, the second heat exchanger and the Turbo-generator Set, Send out for being supplied to the steamer after conventional energy resource heats the steam for coming from the First Heat Exchanger and the second heat exchanger Group of motors a, part for the Turbo-generator Set to be drawn gas and enter described together with the steam discharged from the First Heat Exchanger Heater.
2. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 1 and conventional energy resource, it is characterised in that described Steam turbine include high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, the heater have the first steam inlet, the second steam inlet, First steam (vapor) outlet and the second steam (vapor) outlet,
The air intake of the high pressure cylinder is connected with the first steam (vapor) outlet of the heater, the extraction opening of the high pressure cylinder and institute The first steam inlet for stating heater is connected, the second steam (vapor) outlet phase of the air intake of medium pressure cylinder and the heater Even, the steam drain of medium pressure cylinder is connected with the air intake of the low pressure (LP) cylinder.
3. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 1 and conventional energy resource, it is characterised in that described Turbo-generator Set also includes being connected in turn between the steam drain of the low pressure (LP) cylinder and the First Heat Exchanger and the second heat exchanger Condenser, condensate pump, hydrophobic heat exchanger, low-pressure heater, oxygen-eliminating device and feed pump, the First Heat Exchanger connection Between the feed pump and the first steam inlet of the heater, second heat exchanger be connected to the feed pump with Between second steam inlet of the heater.
4. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 3 and conventional energy resource, it is characterised in that described Low pressure (LP) cylinder also has extraction opening, and the extraction opening of the low pressure (LP) cylinder is connected to heat to enter from the condenser with the low-pressure heater Enter to the condensate in the low-pressure heater.
5. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 4 and conventional energy resource, it is characterised in that described Low-pressure heater includes first to fourth grade of low-pressure heater being one another in series.
6. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 5 and conventional energy resource, it is characterised in that from institute State drawing gas after the hydrophobic heat exchanger for the low pressure (LP) cylinder that first order low-pressure heater and the second level low-pressure heater are discharged Return in the condenser, drawing gas for the low pressure (LP) cylinder discharged from the third level low-pressure heater enters low from the third level In the backwater that pressure heater is discharged, the drawing gas for low pressure (LP) cylinder discharged from the fourth stage low-pressure heater enters into the third level The low pressure discharged after the backwater of the heating third level low-pressure heater and from the third level low-pressure heater in low-pressure heater Drawing gas for cylinder is entered together in the backwater discharged from the third level low-pressure heater.
7. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 3 and conventional energy resource, it is characterised in that described Feed pump drives turbine to drive by feed pump, and it is to come from drawing gas for medium pressure cylinder that the feed pump drives the working medium of turbine.
8. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 3 and conventional energy resource, it is characterised in that described Heater is coal-burning boiler, oil burning boiler or gas fired-boiler.
9. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 1 and conventional energy resource, it is characterised in that described Nuclear reactor is small-sized heap of the thermal power less than 1000MW.
10. the connection in series-parallel coupled electricity-generation system of nuclear energy according to claim 1 and conventional energy resource, it is characterised in that institute Stating the steam of the outlet of First Heat Exchanger or the second heat exchanger includes saturation dry saturated steam, saturation moist steam and superheated steam.
The connection in series-parallel coupled electricity-generation system of 11. nuclear energy according to any one of claim 1-10 and conventional energy resource, it is special Levy and be, the temperature of the steam flowed out from first steam (vapor) outlet or the second steam (vapor) outlet of the heater is 500 DEG C -660℃。
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