CN109139161A - Nuclear energy and thermoelectricity coupled electricity-generation system and method based on accumulation of heat and gas converting heat - Google Patents
Nuclear energy and thermoelectricity coupled electricity-generation system and method based on accumulation of heat and gas converting heat Download PDFInfo
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- CN109139161A CN109139161A CN201810994697.7A CN201810994697A CN109139161A CN 109139161 A CN109139161 A CN 109139161A CN 201810994697 A CN201810994697 A CN 201810994697A CN 109139161 A CN109139161 A CN 109139161A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/14—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours using industrial or other waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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Abstract
The invention discloses a kind of nuclear energy based on accumulation of heat and gas converting heat and thermoelectricity coupled electricity-generation system and method, it include: that condensate system, water supply system and nuclear island are sequentially connected, condensate system includes condenser, circulation is connect with condenser, the steam discharge for entering condenser is cooled to condensed water by circulation, condensed water is delivered to water supply system through condensate system, and water supply system is delivered to nuclear island after heating to water supply；The steam (vapor) outlet pipeline of nuclear island connects steam accumulator, non- nuclear fuel can discharge and reforming unit is connect with gas-vapour heat exchanger, non- nuclear fuel can discharge and reforming unit with couple with the connection of the steam inlet pipe road of steam turbine high-pressure cylinder, gas-vapour heat exchanger is separately connected with coupling with the blow-off line of steam turbine high-pressure cylinder with the steam inlet pipe road for coupling with Steam Turbine Through IP Admission.The present invention takes full advantage of the high specific heat capacity characteristic of high pressure gas, and compared with vapor, increasing non-nuclear fuel can discharge and the safety of reforming unit.
Description
Technical field
The present invention relates to energy technology fields, and hair is coupled with thermoelectricity more particularly to the nuclear energy based on accumulation of heat and gas converting heat
Electric system and method.
Background technique
Presurized water reactor is the mainstream technology of modern Commercial nuclear power.Conventional presurized water reactor is generally two circuit systems, wherein secondary circuit
The steam of system drives steam turbine power generation.Since (presurized water reactor mean outlet temperature is generally low for the limitation of reactor catalyst carrier temperature
In 330 degrees Celsius), can only producing lower (5.0~8.0MPa) saturated vapor of pressure or micro- overheat, (degree of superheat is 20~30 to take the photograph
Family name's degree) steam, full mechanism wants that than enthalpy drop very little, steam moisture is again high, and in order to increase single-machine capacity, steam flow is inevitable very
Greatly.The parameter of commercialization nuclear power plant secondary coolant circuit system is generally pressure about 6~8MPa at present, and about 230 DEG C~290 DEG C or so of temperature,
Generating efficiency about 34%.
Most of nuclear power plant all uses saturated vapor, and the work done of nuclear steam turbine 2/3 is completed in low pressure (LP) cylinder, but nuclear power
The exhaust steam moisture of turbine low pressure cylinder is larger, and generally up to 12%~14%, it is be easy to cause blade erosion, corrosion, therefore general
Using half speed turbine, and need after high pressure cylinder plus special separator dehumidified, reheating.And thermal power plant
Superheated steam is generallyd use, the degree of superheat is high, generallys use full speed steam turbine.Half speed turbine root diameter reaches, weight weight, generally
For, the consumption of materials of half speed turbine than full speed steam turbine more than 2 times, for whole unit, half speed turbine
Weight be about 1.2~2.4 times of full speed unit.The support loading of corresponding Turbine Engine Foundation also increases, and construction investment increases；
Half speed turbine transport, lifting, in terms of investment it is also higher than full speed steam turbine.Equipment manufacturing cost and installation structural construction cost,
Half Speed machine is higher than full speed machine by 20%~30% (to be equivalent to high 7% or so) to entire conventional island.
It is well known that the investment of nuclear power plant is much larger than thermal power plant, and the thermal efficiency of thermal power plant generally higher than nuclear power plant.Such as
Fruit uses suitable method, builds suitable system, the therrmodynamic system of thermal power plant can be coupled into nuclear power plant, then can be big
Width reduces initial cost, and can greatly improve operating thermal efficiency, and economy will be substantially improved.
Due to the inherent safety of high temperature gas cooled reactor, the design allowable temperature of fuel element is up to 1600 DEG C, therefore 10MW
High-temperature gas-solid two-phase flow is completed.It proposes within 2007 a kind of by Modular high-temperature air cooled reactor technology and mature at present super
The scheme of transcritical vapor power cycle technology coupling, the scheme of a machine is matched using more heaps, and primary Ioops use helium closed circulation, helium
Gas flows through pebble bed core from top to bottom and is heated to 750 DEG C or so, and secondary circuit uses water and water steam, and vapor is by helium
It is heated to temperature required for supercritical steam power cycle, such as 565 DEG C, generating efficiency is up to 45% or more, however
It is also due to the nuclear island part commercialized Some Key Technologies of enlargement not make a breakthrough yet, therefore high temperature gas cooled reactor is still in concept
Design phase.
The technological difficulties for needing to solve are broken through due to nuclear island and are much higher than conventional thermal power generating equipment, therefore nuclear power and supercritical steam are dynamic
The key point of power circulation coupling, which is to place hope on, breaks through Nuclear island equipment to adapt to thermoelectricity parameter, but breaks through thermal power generating equipment
Adapt to nuclear island parameter, however but never studied personnel pay attention to this thinking.
Nuclear island is limited to the limitation of fuel stringer assembly, there is the requirement of minimum load when safe operation steadily in the long term；Boiler by
It is limited to combustion stablized influence, there is also minimum steadies to fire load.Generally, the load proportion that nuclear island is safely operated steadily in the long term
It is 15% or so of nuclear island rated load, coal-burning boiler maintains a long-term stability the load proportion of safe operation in the case where not throwing oily situation
It is 30% or so of boiler rated load.
The series-parallel coupled electricity-generation system and nuclear energy and conventional energy resource for disclosing nuclear energy and conventional energy resource in the prior art are straight
Thermal coupling electricity generation system is taken over, but all without the specific embodiment for proposing conventional energy resource boiler, more without proposing to adapt to be
System lifting load, starting and the strategy for cutting off boiler island.The specific heat ratio of especially vapor is lower, if nuclear energy and fossil fuel
" pot " of the boiler of coupling is only that the saturated vapor or micro- superheated steam that come out from nuclear island are heated to the steam that height overheats, that
This special boiler is just heated to liquid water the process of saturated vapor, that is to say, that the process not vaporized, this be because
The latent heat of vaporization is absorbed for water not carry out in the boiler, but is carried out in the nuclear island that the various aspects condition such as temperature range is more suitable for
?.Design of boiler used by this is coupled to nuclear power with fossil energy brings new problem, and the solution party of this problem
Case never has open source literature report.
In conclusion not also being directed to without being directed to the particularly effective resolution policy of system lifting load in the prior art
Entrance is the scientific and reasonable design of the boiler of vapor.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention discloses a kind of nuclear energy and thermoelectricity based on accumulation of heat and gas converting heat
Coupled electricity-generation system and method solve the heating surface design problem for the boiler that entrance is vapor, and it is negative to solve system lifting
The problem of lotus is adjusted.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of nuclear energy based on accumulation of heat and gas converting heat and thermoelectricity coupled electricity-generation system disclosed in one or more embodiments
System, comprising: condensate system, water supply system, circulation, coupling steam turbine, band base load turbine, steam accumulation of heat
Device, gas-vapour heat exchanger, non-nuclear fuel can discharge and reforming unit and nuclear island；The coupling includes coupling steamer with steam turbine
Machine high pressure cylinder, coupling Steam Turbine Through IP Admission and coupling turbine low pressure cylinder；
Condensate system, water supply system and nuclear island are sequentially connected, and the condensate system includes condenser, circulation
It is connect with condenser, the steam discharge for entering condenser is cooled to condensed water by circulation, and the condensed water is through condensate system
It is delivered to water supply system, water supply system is delivered to nuclear island after heating to water supply；
The steam (vapor) outlet pipeline of nuclear island connects steam accumulator, and the outlet vapor pipeline of the steam accumulator is divided into four
Road, wherein the first via is connected to band base load turbine, and the second tunnel, which is connected to non-nuclear fuel, can discharge and reforming unit, and third road connects
Condenser is connect, the 4th tunnel drains into atmosphere；
The non-nuclear fuel can discharge and reforming unit is connect with gas-vapour heat exchanger, and the non-nuclear fuel can discharge and turn
Makeup is set and is connect with the steam inlet pipe road of coupling steam turbine high-pressure cylinder, and the gas-vapour heat exchanger uses steam turbine high-pressure cylinder with coupling
Blow-off line be separately connected with the steam inlet pipe road for coupling with Steam Turbine Through IP Admission.
Further, the non-nuclear fuel can discharge and reforming unit includes steam superheater, the outlet of steam accumulator
Steam is heated as main steam by steam superheater, and main steam enters coupling by main steam line and makes of steam turbine high-pressure cylinder
Function.
Further, the non-nuclear fuel can discharge and reforming unit includes gas heat absorption device, and the gas heat absorption device is logical
Gas circulating cooling blower is crossed to connect to form reheat system primary Ioops with gas-vapour heat exchanger；Gas passes through gas circulating cooling wind
Machine forms circulation in reheat system primary Ioops.
Further, the gas-vapour heat exchanger, coupling are used in steam turbine with the blow-off line of steam turbine high-pressure cylinder with coupling
The steam inlet pipe road of cylinder pressure collectively forms reheat system secondary circuit, and gas exchanges heat after absorbing heat in gas heat absorption device in gas-vapour
The cold reheated steam for transferring heat to the discharge of coupling steam turbine high-pressure cylinder in device again, so that cold reheated steam is heated referred to as
Reheat heat steam, reheat heat steam enter power generation of doing work in coupling Steam Turbine Through IP Admission.
Further, the condensate system is the condensate system with low-temperature flue gas waste heat utilization apparatus, is specifically included:
Sequentially connected condenser, condensate pump, gland heater, 2# low-pressure heater, low-temperature flue gas waste heat utilization apparatus, 1# low pressure
Heater and oxygen-eliminating device；The oxygen-eliminating device is using the steam extraction of Steam Turbine Through IP Admission or steam discharge as heat source, the low-temperature flue gas
Residual heat using device the outlet of 2# low-pressure heater is heated as heat source using low-temperature flue gas after, it is solidifying before 1# low-pressure heater entrance
It bears water.
Further, the water supply system is the water supply system with medium temperature flue gas waste heat utilization device, is specifically included: successively
Feed pump, high-pressure heater and the medium temperature flue gas waste heat utilization device of connection；The water supply of water supply system output is delivered to nuclear island；Institute
State that medium temperature flue gas waste heat utilization device can be discharged using non-nuclear fuel and the smoke evacuation of reforming unit is as heat source；
When normal coupling operation, the water supply of oxygen-eliminating device output, which is directly entered in medium temperature flue gas waste heat utilization device, to be heated,
Or it first passes through high-pressure heater and enters back into medium temperature flue gas waste heat utilization device and be heated；When medium temperature flue gas waste heat utilization device
When deactivating, the water supply of oxygen-eliminating device output is heated in high-pressure heater；Water supply after heating is delivered to nuclear island.
Further, from medium temperature flue gas waste heat utilization device come out flue gas successively pass through denitrification apparatus, air preheater,
Enter low-temperature flue gas waste heat utilization apparatus after deduster and air-introduced machine, the flue gas come out from low-temperature flue gas waste heat utilization apparatus passes through
Desulfurizer is finally discharged from chimney.
Further, the circulation includes: water circulating pump, cooling pond and cooling tower；Water circulating pump entrance connects
From cooling pond, water circulating pump outlet connection condenser, cooling tower is connect with cooling pond, in recirculated water and entrance condenser
Steam discharge carries out heat exchange, and cooling pond is then entered after cooling tower cools down.
Further, the non-nuclear fuel that the non-nuclear fuel can discharge and reforming unit uses can include fossil fuel, life
Biomass fuel, rubbish etc..
A kind of nuclear energy based on accumulation of heat and gas converting heat and thermoelectricity coupled electricity-generation disclosed in one or more embodiments
Method, comprising:
Water supply is delivered to nuclear island after being heated, and heated in nuclear island, vaporization becomes saturated vapor or moist steam, described
Saturated vapor or moist steam are exported to steam accumulator；The steam of steam accumulator output is sent all the way to band base load steamer
Machine acting, is delivered to that non-nuclear fuel can discharge and reforming unit is heated becomes main steam all the way, and the main steam enters coupling and uses
It does work in steam turbine high-pressure cylinder, drives the first electrical power generators；
In the first stage of starting, the saturated vapor or moist steam of nuclear island outlet are laggard through steam accumulator adjustment pressure
Enter band base load turbine acting power generation；
In the second stage of starting, non-nuclear fuel can discharge and reforming unit starts on-load, nuclear island Load lifting, system
It can be discharged into nuclear island and non-nuclear fuel and the coupling operational mode of reforming unit: the steam of nuclear island base load being maintained still to enter
Band base load turbine, while in addition to meet maintain nuclear island base load other than steam, can be discharged into non-nuclear fuel and
Reforming unit, which is further heated, becomes main steam, and main steam enters coupling and done work with steam turbine high-pressure cylinder；
Gas in gas-vapour heat exchanger and non-nuclear fuel can discharge and reforming unit in high-temperature steam exchange heat to form reheating
The steam discharge of system primary Ioops, coupling steam turbine high-pressure cylinder enters coupling steamer after the gas heating in gas-vapour heat exchanger
Machine intermediate pressure cylinder does work to form reheat system secondary circuit；Coupling enters coupling with Steam Turbine Through IP Admission steam discharge and makes of turbine low pressure cylinder
Function drives the second electrical power generators.
Further, non-nuclear fuel can discharge and when reforming unit breaks down, and non-nuclear fuel can discharge and reforming unit
Out of service, high pressure cylinder, intermediate pressure cylinder, the low pressure (LP) cylinder of coupling steam turbine are out of service, and the second generator stops power generation；
Non- nuclear fuel can discharge and reforming unit initial stage out of service, and the steam of steam accumulator outlet enters band and bears substantially
Lotus steam turbine does work and drives the first electrical power generators；Extra steam drains into condenser and/or atmosphere in steam accumulator；
The confluent for reducing nuclear island, when the quantity of steam of nuclear island outlet is reduced to the maximum with base load turbine into vapour energy
When the quantity of steam of power, steam accumulator stops to condenser and/or atmospheric steam exhaust.
The invention has the benefit that
1, a kind of nuclear energy and thermoelectricity coupled electricity-generation system based on accumulation of heat and gas converting heat of special designing of the present invention, sufficiently
The high specific heat capacity characteristic of high pressure gas is utilized, compared with vapor, increasing non-nuclear fuel can discharge and the peace of reforming unit
Quan Xing.
2, high pressure gas has been applied in experimental reactor as the primary Ioops of nuclear island high temperature gas cooled reactor, high pressure gas and steam
Heat exchange is applied in experimental reactor in the secondary circuit of nuclear island high temperature gas cooled reactor, gas-vapour heat exchange equipment mature and reliable, but is used
Non- nuclear fuel can discharge and reforming unit in belong to it is pioneering, and for heat reheated steam also belong to it is pioneering.
3, by setting steam accumulator, striven for that steam enters non-nuclear fuel and can discharge and when the buffering of reforming unit
Between, it can be discharged to nuclear island and non-nuclear fuel and the matching of reforming unit operation enhances safety.
4, it is provided with band base load turbine, under the operating conditions such as starting, decoupling, nuclear island can maintain minimum load long-term
Stablize independent operating, greatly reduces the economic loss and security risk of reactor start and stop.
5, the vapor (steam) temperature of coupled system can reach 500~700 degrees Celsius, below with 300 degrees Celsius of nuclear island outlet
Temperature is compared, and thermal efficiency of cycle greatly improves, and under same nuclear island investment and operating cost, the electric power that nuclear energy is issued substantially is mentioned
Height, to realize efficient nuclear energy uses.
6, using medium temperature flue gas waste heat utilization device and low-temperature flue gas waste heat utilization apparatus, the non-nuclear fuel energy cigarette of deep exploitation
The waste heat of gas, saves fuel cost.
7, since steam superheat is higher, after steam turbine does work, exhaust steam moisture is far below the nuclear power vapour of modern Commercial
Turbine, therefore coupling steam turbine has the condition using lighter more compact full speed steam turbine, greatly reduce investment at
This.
8, using conventional two circuit technology of nuclear island, radiation protection and waste processing comparative maturity are simple.
Detailed description of the invention
Fig. 1 is nuclear energy and thermoelectricity coupled electricity-generation system structure diagram based on accumulation of heat and gas converting heat；
Fig. 2 can discharge for non-nuclear fuel and reforming unit structural schematic diagram；
Wherein, 1. non-nuclear fuels can discharge and reforming unit, 2. medium temperature flue gas waste heat utilization devices, 3. gas-vapour heat exchanger,
4. denitrification apparatus, 5. air preheaters, 6. dedusters, 7. air-introduced machines, 8. nuclear islands, 9. first generators, 10. second generators,
11. steamer is used in band base load turbine, 12. coupling steam turbine high-pressure cylinders, 13. coupling Steam Turbine Through IP Admissions, 14. couplings
Machine low pressure (LP) cylinder, 15. steam accumulators, 16. high-pressure heaters, 17. feed pumps, 18. oxygen-eliminating devices, 19.#1 low-pressure heater, 20.
Low-temperature flue gas waste heat utilization apparatus, 21.#2 low-pressure heater, 22. gland heaters, 23. condensers, 24. desulfurizers, 25.
Chimney, 26. water circulating pumps, 27. cooling towers, 28. cooling ponds.
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In order to solve the problems, such as to point out in background technique, the invention discloses a kind of nuclear energy based on accumulation of heat and gas converting heat
With thermoelectricity coupled electricity-generation system, as shown in Figure 1, comprising: the condensate system with low-temperature flue gas waste heat utilization apparatus, band medium temperature cigarette
The water supply system of gas residual heat using device, circulation, coupling steam turbine, band base load turbine 11, steam accumulation of heat
Device 15, reheat system, non-nuclear fuel can discharge and reforming unit 1 and nuclear island 8；
Wherein, the condensate system with low-temperature flue gas waste heat utilization apparatus includes: that condenser 23, condensate pump, axle envelope add
Hot device 22,2# low-pressure heater 21, low-temperature flue gas waste heat utilization apparatus 20,1# low-pressure heater 19 and oxygen-eliminating device 18；Oxygen-eliminating device
18 using the steam extraction of Steam Turbine Through IP Admission or steam discharge as heat source, and low-temperature flue gas waste heat utilization apparatus 20 is heat with low-temperature flue gas
Source heat 2# low-pressure heater 21 export after, the condensed water before 19 entrance of 1# low-pressure heater.
Condensed water is cooled to by circulation into the steam in condenser 23, circulation includes: water circulating pump
26, cooling pond 28 and cooling tower 27；26 entrance of water circulating pump is connected to cooling pond 28.The outlet of water circulating pump 26 connection condenser
23 cooling steam discharges of the coupling with turbine low pressure cylinder 14 and with base load turbine 11, with the steam discharge entered in condenser 23
After carrying out heat exchange, the heated heating of recirculated water enters cooling pond 28 after the cooling of cooling tower 27.27 cool principle of cooling tower with
Conventional thermoelectricity, the cooling tower principle of nuclear power are identical, cooling for example, by using cooling tower filler mode.
Water supply system with medium temperature flue gas waste heat utilization device includes: sequentially connected feed pump 17, high-pressure heater 16
With medium temperature flue gas waste heat utilization device 2；Medium temperature flue gas waste heat utilization device 2 and non-nuclear fuel can discharge and the row of reforming unit 1
Smoke pipeline connection, can be discharged using non-nuclear fuel and the smoke evacuation of reforming unit 1 is as heat source；
Oxygen-eliminating device 18 is connect with feed pump 17, and on connecting line of the feed pump 17 with high-pressure heater 16 and high pressure adds
Valve 1-6 and valve 1-7 is respectively set on hot device 16 and the connecting line of medium temperature flue gas waste heat utilization device 2, in medium temperature flue gas
Valve 1-10 is set on the connecting line of residual heat using device 2 and nuclear island 8；Feed pump 17 also by valve 1-5 and valve 1-9 with
Medium temperature flue gas waste heat utilization device 2 connects, and high-pressure heater 16 is connected directly to nuclear island 8 by valve 1-7 and valve 1-8.
In conjunction with Fig. 1, control valve 1-6, valve 1-7 and valve 1-8 are opened, and valve 1-5, valve 1-9 and valve 1-10 are closed
It closes, the water supply that feed pump 17 exports is delivered to nuclear island 8 after the heating of high-pressure heater 16；
Control valve 1-6, valve 1-7, valve 1-9 and valve 1-10 are opened, and valve 1-5 and valve 1-8 are closed, feed pump
The water supply of 17 outputs is successively sent into nuclear island 8 after high-pressure heater 16 and medium temperature flue gas waste heat utilization device 2 heat；
Control valve 1-5, valve 1-9 and valve 1-10 are opened, and valve 1-6, valve 1-7 and valve 1-8 are closed, feed pump
The water supply of 17 outputs is sent into nuclear island 8 after the heating of medium temperature flue gas waste heat utilization device 2.
It should be noted that this field is traditionally using oxygen-eliminating device as boundary, it is known as condensed water before oxygen-eliminating device, after oxygen-eliminating device
Referred to as water supply.
When normal coupling operation, the water supply that oxygen-eliminating device 18 exports, which is directly entered in medium temperature flue gas waste heat utilization device 2, to be added
Heat, or first pass through high-pressure heater 16 and enter back into medium temperature flue gas waste heat utilization device 2 and be heated；When medium temperature fume afterheat benefit
When being deactivated with device 2, the water supply that oxygen-eliminating device 18 exports is heated in high-pressure heater 16；Water supply after heating is delivered to nuclear island
8。
Water supply enters nuclear island 8 by the feed-water intake pipeline of nuclear island 8, and heated, vaporization becomes saturated vapor or mass dryness fraction
The moist steam of moist steam greater than 0.9, saturated vapor or mass dryness fraction greater than 0.9 is exported by 8 outlet vapor pipeline of nuclear island to steaming
Vapour storage heater 15；Steam accumulator 15 has certain heat storage capacity and buffer capacity to steam.
The outlet vapor pipeline of steam accumulator 15 is divided into four tunnels, and wherein the first via is connected to band base load turbine 11,
Second tunnel is connected to that non-nuclear fuel can discharge and reforming unit 1, third road are connect with condenser 23, and the 4th tunnel drains into atmosphere.Wherein,
The first via is connected to the purposes with base load turbine 11 and is to maintain the minimum load of 8 long-term safety of nuclear island operation, such as core
25% load of island 8 at full capacity；Second tunnel be connected to non-nuclear fuel can discharge and the purposes of reforming unit 1 be using non-core fire
Expect the heat steam of energy, improve vapor (steam) temperature and cycle efficieny；The purposes that third road is connected to condenser 23 is in steam turbine
When accident conditions, steam is discharged by the way that steam is drained into condenser 23；The purposes that 4th tunnel is connected to atmosphere is steam accumulation of heat
To the safety relief of steam when 15 superpressure of device.
As shown in Fig. 2, non-nuclear fuel can discharge and reforming unit 1 includes: steam superheater and gas heat dump；Gas-vapour
Heat exchanger 3 is connect by gas circulating cooling blower with gas heat absorption device, and reheat system primary Ioops are formed；Gas-vapour heat exchanger 3 with
The coupling blow-off line (i.e. cold reheaing steam pipe) of steam turbine high-pressure cylinder 12 and coupling Steam Turbine Through IP Admission 13 into
Steam pipe road (i.e. hot reheat steam line) is separately connected, and forms reheat system secondary circuit.
Be connected to non-nuclear fuel can discharge and the steam of reforming unit 1 in steam superheater further be heated become main steaming
Vapour, main steam enters the acting of coupling steam turbine high-pressure cylinder 12 by main steam line, while gas circulating cooling blower also opens
Dynamic, gas forms circulation in reheat system primary Ioops.Gas is absorbed after heat in gas heat absorption device in gas-vapour heat exchanger 3
In transfer heat to cold reheated steam again so that cold reheated steam is heated referred to as reheat heat steam, reheat heat steam enters
It does work and generates electricity in coupling Steam Turbine Through IP Admission 13.
Non- nuclear fuel can discharge and the flue gas of reforming unit 1 successively through medium temperature flue gas waste heat utilization device 2, denitrification apparatus 4,
Air preheater 5, deduster 6, air-introduced machine 7, low-temperature flue gas waste heat utilization apparatus 20 and 24 heel row of desulfurizer are to chimney 25.It is low
Warm flue gas waste heat utilization device 20, come heat-setting water, takes full advantage of the waste heat of flue gas using the low-temperature flue gas entered in it,
Energy conservation and environmental protection.
It should be noted that non-nuclear fuel can discharge and reforming unit 1 selects fossil fuel dum boiler or fossil combustion
Material direct current cooker or other can convert thermal energy for the chemical energy of non-nuclear fuel, and transfer thermal energy to thermal cycle working medium
Device, such as coal-burning boiler, oil burning boiler, gas fired-boiler, biomass boiler, waste incinerator etc..
On the whole, non-nuclear fuel can discharge and the entrance of reforming unit 1 is steam and gas, wherein steam is in mistake
Medium in hot systems, high pressure gas are the media in reheat system primary Ioops.Gas selects the gas of high specific heat capacity, such as
Helium, carbon dioxide etc..These are also certain common gases of nuclear power station high temperature gas cooled reactor, therefore the spy with mature and reliable
Point.Since the specific heat capacity of these gases is much higher than vapor, compared with entrance only has the boiler of vapor, the safety of boiler
Property greatly improves.
Due to be provided with steam accumulator 15, can largely strive for steam enter non-nuclear fuel can discharge and
The buffer time of reforming unit 1 can discharge to nuclear island 8 and non-nuclear fuel and the matching of reforming unit 1 operation enhances safety.
Preferably, band base load turbine 11 uses half speed turbine, coupling steam turbine high-pressure cylinder 12, coupling vapour
Turbine intermediate pressure cylinder 13, coupling turbine low pressure cylinder 14 are all made of full speed steam turbine.Band base load turbine 11 connection first
Generator 9, coupling connect the second generator 10 with steam turbine.
A kind of nuclear energy based on accumulation of heat and gas converting heat disclosed in one or more embodiments couples hair with thermoelectricity
Method for electrically, comprising:
Coupling steam turbine and steam discharge with base load turbine 11 are cooled to condensed water, and condensed water passes through condensed water
System is delivered to water supply system, and water supply is delivered to nuclear island 8 after being heated, heated, vaporization becomes saturated vapor or mass dryness fraction is big
In 0.9 moist steam, the moist steam of saturated vapor or mass dryness fraction greater than 0.9 is exported by 8 outlet vapor pipeline of nuclear island to steam
Storage heater 15；Steam accumulator 15 has certain heat storage capacity and buffer capacity to steam；The steaming that steam accumulator 15 exports
Vapour is divided into four tunnels, is sent all the way to band base load turbine 11 and is done work, being delivered to non-nuclear fuel all the way can discharge and reforming unit 1
Heated to become main steam, main steam enters coupling and is done work in steam turbine high-pressure cylinder 12, driving the first generator 9 power generation.In addition
Two-way is arranged to atmosphere or is delivered to condenser 23.
In the first stage of starting, valve 1-2,1-3,1-4 are closed, and valve 1-1 is opened, the saturated vapor that nuclear island 8 exports
Or moist steam of the mass dryness fraction greater than 0.9 enters the acting hair of this load turbine of tape base 11 after steam accumulator 15 adjusts pressure
Electricity；
In the second stage of starting, non-nuclear fuel can discharge and reforming unit 1 starts on-load, and 8 load of nuclear island starts to mention
It rises, system enters nuclear island 8 and non-nuclear fuel can discharge and the coupling operational mode of reforming unit 1, valve 1-1 are still opened, dimension
The steam for holding 8 base load of nuclear island still enters band base load turbine 11, while valve 1-2 is also opened, and nuclear island 8 first rises negative
Lotus increases, the steaming other than meeting and maintaining 8 base load of nuclear island into the water supply of nuclear island 8 and from the quantity of steam of nuclear island 8 out
Vapour, can be discharged by valve 1-2 into non-nuclear fuel and reforming unit 1 is further heated as main steam, and main steam enters coupling
Power generation of doing work in steam turbine high-pressure cylinder 12 is shared, while gas circulating cooling blower also starts, gas is in reheat system primary Ioops
Middle formation circulation.Gas transfers heat to cold reheating steaming after absorbing heat in gas heat absorption device again in gas-vapour heat exchanger 3
Vapour, so that cold reheated steam is heated referred to as reheat heat steam, reheat heat steam enters coupling to be made of in Steam Turbine Through IP Admission 13
Function power generation.
When non-nuclear fuel can discharge and reforming unit 1 breaks down, it can discharge and convert with non-nuclear fuel into nuclear island 8
The decoupling operational mode of device 1: closing valve 1-2, and non-nuclear fuel can discharge and reforming unit 1 is out of service, and steamer is used in coupling
High pressure cylinder, intermediate pressure cylinder, the low pressure (LP) cylinder of machine are out of service, correspondingly, the second generator 10 stops power generation；Steam accumulator 15 goes out
The steam of mouth enters the acting of band base load turbine 11 by valve 1-1 and the first generator 9 is driven to generate electricity；Due to stopping suddenly
Only running non-nuclear fuel can discharge and reforming unit 1, and, nuclear island less after all with quantity of steam needed for base load turbine 11
The quantity of steam of 8 outlets are difficult to moment reduction, and extra steam is drained into condenser 23 and atmosphere, together by therefore Open valve 1-3,1-4
When gradually reduce to the confluent of nuclear island 8, when nuclear island 8 export quantity of steam be reduced to steaming needed for base load turbine 11
When vapour amount, valve 1-3,1-4 are closed.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of nuclear energy based on accumulation of heat and gas converting heat and thermoelectricity coupled electricity-generation system characterized by comprising condensation water system
System, water supply system, circulation, coupling with steam turbine, band base load turbine, steam accumulator, gas-vapour heat exchanger,
Non- nuclear fuel can discharge and reforming unit and nuclear island；The coupling steam turbine includes coupling steam turbine high-pressure cylinder, coupling use
Steam Turbine Through IP Admission and coupling turbine low pressure cylinder；
Condensate system, water supply system and nuclear island are sequentially connected, and the condensate system includes condenser, circulation and solidifying
The steam discharge for entering condenser is cooled to condensed water by the connection of vapour device, circulation, and the condensed water is conveyed through condensate system
To water supply system, water supply system is delivered to nuclear island after heating to water supply；
The steam (vapor) outlet pipeline of nuclear island connects steam accumulator, and the outlet vapor pipeline of the steam accumulator is divided into four tunnels,
The middle first via is connected to band base load turbine, and the second tunnel, which is connected to non-nuclear fuel, can discharge and reforming unit, and the connection of third road is solidifying
Vapour device, the 4th tunnel drain into atmosphere；
The non-nuclear fuel can discharge and reforming unit is connect with gas-vapour heat exchanger, and the non-nuclear fuel can discharge and convert dress
It sets and is connect with the steam inlet pipe road of coupling steam turbine high-pressure cylinder, the gas-vapour heat exchanger uses the row of steam turbine high-pressure cylinder with coupling
Steam pipe road is separately connected with the steam inlet pipe road for coupling with Steam Turbine Through IP Admission.
2. a kind of nuclear energy based on accumulation of heat and gas converting heat as described in claim 1 and thermoelectricity coupled electricity-generation system, feature
It is, the non-nuclear fuel can discharge and reforming unit includes steam superheater, and the outlet vapor of steam accumulator is by steam mistake
Hot device is heated as main steam, and main steam enters coupling by main steam line and done work with steam turbine high-pressure cylinder.
3. a kind of nuclear energy based on accumulation of heat and gas converting heat as described in claim 1 and thermoelectricity coupled electricity-generation system, feature
It is, the non-nuclear fuel can discharge and reforming unit includes gas heat absorption device, and the gas heat absorption device is recycled cold by gas
But blower connect to form reheat system primary Ioops with gas-vapour heat exchanger；Gas is by gas circulating cooling blower in reheat system
Circulation is formed in primary Ioops.
4. a kind of nuclear energy based on accumulation of heat and gas converting heat as claimed in claim 3 and thermoelectricity coupled electricity-generation system, feature
Be, the gas-vapour heat exchanger, coupling with the blow-off line of steam turbine high-pressure cylinder with couple the steam inlet pipe for using Steam Turbine Through IP Admission
Road collectively forms reheat system secondary circuit, and gas is absorbed after heat in gas-vapour heat exchanger in gas heat absorption device again heat
The cold reheated steam of coupling steam turbine high-pressure cylinder discharge is passed to, so that cold reheated steam is heated referred to as reheat heat steam,
Reheat heat steam enters power generation of doing work in coupling Steam Turbine Through IP Admission.
5. a kind of nuclear energy based on accumulation of heat and gas converting heat as described in claim 1 and thermoelectricity coupled electricity-generation system, feature
It is, the condensate system is the condensate system with low-temperature flue gas waste heat utilization apparatus, is specifically included: sequentially connected solidifying
Vapour device, condensate pump, gland heater, 2# low-pressure heater, low-temperature flue gas waste heat utilization apparatus, 1# low-pressure heater and deoxygenation
Device；The oxygen-eliminating device is using the steam extraction of Steam Turbine Through IP Admission or steam discharge as heat source, the low-temperature flue gas waste heat utilization apparatus
Using low-temperature flue gas as heat source heat 2# low-pressure heater outlet after, the condensed water before 1# low-pressure heater entrance.
6. a kind of nuclear energy based on accumulation of heat and gas converting heat as claimed in claim 5 and thermoelectricity coupled electricity-generation system, feature
It is, the water supply system is the water supply system with medium temperature flue gas waste heat utilization device, is specifically included: sequentially connected water supply
Pump, high-pressure heater and medium temperature flue gas waste heat utilization device；The water supply of water supply system output is delivered to nuclear island；The medium temperature flue gas
Residual heat using device can be discharged using non-nuclear fuel and the smoke evacuation of reforming unit is as heat source；
When normal coupling operation, the water supply of oxygen-eliminating device output, which is directly entered in medium temperature flue gas waste heat utilization device, to be heated, or
It first passes through high-pressure heater and enters back into medium temperature flue gas waste heat utilization device and be heated；When medium temperature flue gas waste heat utilization device deactivates
When, the water supply of oxygen-eliminating device output is heated in high-pressure heater；Water supply after heating is delivered to nuclear island.
7. a kind of nuclear energy based on accumulation of heat and gas converting heat as claimed in claim 6 and thermoelectricity coupled electricity-generation system, feature
It is, the flue gas come out from medium temperature flue gas waste heat utilization device successively passes through denitrification apparatus, air preheater, deduster and air inducing
Enter low-temperature flue gas waste heat utilization apparatus after machine, the flue gas come out from low-temperature flue gas waste heat utilization apparatus passes through desulfurizer, most
It is discharged afterwards from chimney.
8. a kind of nuclear energy based on accumulation of heat and gas converting heat as described in claim 1 and thermoelectricity coupled electricity-generation system, feature
It is, the circulation includes: water circulating pump, cooling pond and cooling tower；Water circulating pump entrance is connected to cooling pond, follows
Ring exit of pump connects condenser, and cooling tower is connect with cooling pond, and recirculated water and the steam discharge entered in condenser carry out hot friendship
It changes, cooling pond is then entered after cooling tower cools down.
9. a kind of nuclear energy based on accumulation of heat and gas converting heat and thermoelectricity coupled electricity-generation method characterized by comprising
Water supply is delivered to nuclear island after being heated, and heated in nuclear island, vaporization becomes saturated vapor or moist steam, the saturation
Steam or moist steam are exported to steam accumulator；The steam of steam accumulator output send all the way to band base load turbine and does
Function, is delivered to that non-nuclear fuel can discharge and reforming unit is heated becomes main steam all the way, and the main steam enters coupling steamer
It does work in machine high pressure cylinder, drives the first electrical power generators；
In the first stage of starting, the saturated vapor or moist steam of nuclear island outlet enter band after steam accumulator adjusts pressure
Base load turbine acting power generation；
In the second stage of starting, non-nuclear fuel can discharge and reforming unit starts on-load, nuclear island Load lifting, and system enters
Nuclear island and non-nuclear fuel can discharge and the coupling operational mode of reforming unit: the steam of nuclear island base load being maintained still to enter tape base
This load turbine, while the steam other than meeting and maintaining nuclear island base load, can discharge and convert into non-nuclear fuel
Device, which is further heated, becomes main steam, and main steam enters coupling and done work with steam turbine high-pressure cylinder；
Gas in gas-vapour heat exchanger and non-nuclear fuel can discharge and reforming unit in high-temperature steam exchange heat to form reheat system
The steam discharge of primary Ioops, coupling steam turbine high-pressure cylinder enters in coupling steam turbine after the gas heating in gas-vapour heat exchanger
Cylinder pressure does work to form reheat system secondary circuit；Coupling enters coupling with Steam Turbine Through IP Admission steam discharge and is done work with turbine low pressure cylinder,
Drive the second electrical power generators.
10. a kind of nuclear energy based on accumulation of heat and gas converting heat as claimed in claim 9 and thermoelectricity coupled electricity-generation method, feature
It is, when non-nuclear fuel can discharge and reforming unit breaks down, non-nuclear fuel can discharge and reforming unit is out of service, coupling
Out of service with the high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder of steam turbine, the second generator stops power generation；
Non- nuclear fuel can discharge and reforming unit initial stage out of service, and the steam of steam accumulator outlet enters band base load vapour
Turbine does work and drives the first electrical power generators；Extra steam drains into condenser and/or atmosphere in steam accumulator；
The confluent for reducing nuclear island, when the quantity of steam of nuclear island outlet is reduced to the maximum with base load turbine into vapour ability
When quantity of steam, steam accumulator stops to condenser and/or atmospheric steam exhaust.
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