CN210768963U - Peak regulation system of air separation device of nuclear power plant - Google Patents
Peak regulation system of air separation device of nuclear power plant Download PDFInfo
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- CN210768963U CN210768963U CN201920700356.4U CN201920700356U CN210768963U CN 210768963 U CN210768963 U CN 210768963U CN 201920700356 U CN201920700356 U CN 201920700356U CN 210768963 U CN210768963 U CN 210768963U
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Abstract
The utility model discloses a nuclear power plant air separation plant peak regulation system, the peak regulation system includes nuclear power unit, nuclear power unit includes nuclear power boiler, big steam turbine, generator and power plant centralized control system, power plant centralized control system includes the peak regulation control module, the peak regulation control module accepts the peak regulation instruction of electric wire netting dispatch center; the peak shaving control module can be used for shaving the electric power of the generator and/or the steam of the nuclear power plant unit to the air separation device so as to drive the air separation device; the utility model discloses effectively utilize peak shaving surplus electric quantity, the equipment energy supply that heat energy satisfies air separator of nuclear power unit, reduce external supplementary drive air separator's energy consumption, avoid the wasting of resources, improve energy utilization and rate, make the transformation of modern nuclear power plant become the comprehensive mill of electric energy, heat energy, compressed air ability and various air separation gas products.
Description
Technical Field
The utility model relates to an air separation and thermal power peak regulation technical field, more specifically say, relate to a system for utilize nuclear power plant peak regulation electric power or peak regulation steam to give air separation plant energy supply.
Background
At the present stage, the electric energy output and capacity in the electric power system in China are rich, and the peak regulation can be carried out on a gas turbine, a water pump, an energy storage and the like so as to solve the problem of power supply scarcity; at present, contradiction between peak regulation of a power grid and flexibility of a thermal power generating unit is prominent, and the capacity of the power grid for absorbing new energy such as wind power, photoelectricity, hydropower, nuclear power and the like is insufficient.
In the aspect of nuclear power, the fact that global nuclear power is not increased and weak is solved, and the speed of newly building a nuclear reactor is not higher than the speed of closing the nuclear power station. In such a disastrous situation, the relative strengths of the Chinese nuclear power are especially strong: the latest release of world energy prospect 2017 by the international energy agency considers that the prospect of global nuclear power development is still dim, but China can continue to lead the gradual development of nuclear power production. The "prospect" even predicts that by 2030, China surpasses the United states and becomes the largest nuclear power producing country. In the last two years, 2016 and 2017, however, the national energy agency has not approved new nuclear power projects for two consecutive years. In 2017, only two nuclear power generating units which are built before are connected to the power generation network in China. In addition, the mean utilization hours of nuclear power in the whole country in 2015 are reduced by 437 hours, the reduction amplitude reaches 5.6 percent, namely, 125 hundred million-degree electricity is generated, and the mean utilization hours of some nuclear power generating units are already reduced to 5000 hours.
Therefore, how to improve the peak load regulation capability of the nuclear power station becomes an important index for the future nuclear power development.
On the other hand, the large-scale air separation device is more and more widely applied in the industries of steel, chemical industry and synthetic ammonia, new projects of the large-scale air separation device are more and more implemented, and the total energy consumption of the large-scale air separation device in the society is increased year by year.
The air separation equipment takes air as a raw material and separates the air by any one of three methods of cryogenic air separation, pressure swing adsorption or membrane separation. The most mature method is cryogenic air separation, which changes air into liquid by a compression cycle deep freezing method and gradually separates inert gases such as oxygen, nitrogen, argon and the like from the liquid air by rectification.
At present, air separation equipment produced in China has various forms and varieties. There are devices for producing gaseous oxygen, gaseous nitrogen, such as oxygen generators; there are also apparatuses for producing liquid oxygen and liquid nitrogen. However, there are mainly four basic processes, i.e., high-pressure, medium-pressure, high-low-pressure and full-low-pressure processes. The production scale of air separation equipment in China can only produce 20m in the early stage3Oxygen generator for h (oxygen), the current oversize air separation equipment has the production of 20000m3/h、30000m3H and 50000m3Ability/h (oxygen).
From a process flow perspective, an air separation plant can be divided into 5 basic systems: purification system of impurities: the air purifier is mainly used for purifying mechanical impurities, moisture, carbon dioxide, acetylene and the like mixed in the air through devices such as an air filter, a molecular sieve absorber and the like. Air cooling and liquefaction system: the air-conditioning system mainly comprises an air compressor, a heat exchanger, an expander, an air throttle valve and the like, and plays a role in deeply freezing air. Air rectification system: the main components are a rectifying tower (an upper tower and a lower tower), a condensing evaporator, a subcooler, a liquid air throttle valve and a liquid nitrogen throttle valve; which serves to separate the various components of the air. Heating and blowing system: the purification system is regenerated by heating and blowing. An instrument control system: the whole process is controlled by various instruments. In summary, the high energy consumption of large air separation plants is an important bottleneck hindering the development of the air separation industry.
In view of this, the present invention is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize peak regulation electric power or peak regulation steam of nuclear power plant for the energy supply of air separation plant to utilize air separation plant's gaseous product to provide cold volume, heat, compressed air and the high nuclear power plant's of energy utilization rate peak regulation system of empty terminal gas product to outer.
In order to realize the utility model aims at, the utility model adopts the following technical scheme:
a peak regulation system of an air separation device of a nuclear power plant comprises a nuclear power unit, wherein the nuclear power unit comprises a nuclear power boiler, a large steam turbine, a generator and a power plant centralized control system, the power plant centralized control system comprises a peak regulation control module, and the peak regulation control module receives a peak regulation instruction of a power grid dispatching center; the peak shaving control module can be used for shaving the electric power of the generator and/or the steam of the nuclear power plant unit to the air separation device so as to drive the air separation device.
Preferably, the driving steam of the air separation device comes from an extraction pipeline of a large turbine of a nuclear power unit or a main steam pipeline of a power plant.
Preferably, the peak shaving system comprises a small turbine of the steam driven air separation plant, and the small turbine is communicated with a steam extraction pipeline of the large turbine or a main steam pipeline of the power plant.
Preferably, the air separation unit comprises a compressor; the small steam turbine is connected with the compressor through a coupler to drive the compressor.
Preferably, the compressor is an air compressor and/or a supercharger.
Preferably, the air separation unit comprises a compressor; the generator is connected with the compressor to electrically drive the compressor.
Preferably, the compressor is at least one of an air compressor, a supercharger and a product supercharger.
Preferably, the peak shaving system is further provided with an auxiliary small steam turbine, one end of the auxiliary small steam turbine is connected with a steam extraction pipeline of the large steam turbine or a main steam pipeline of the power plant, the other end of the auxiliary small steam turbine is connected with a supercharger, and the small steam turbine is connected with an air compressor.
Preferably, the compressed air produced by the air compression process of the air separation plant is used as a source of industrial drive compressed air for a nuclear power plant or a nearby industrial park.
Preferably, the product booster comprises an oxygen compressor and/or a nitrogen compressor; the air separation device comprises a precooling system, a supercharger, a molecular sieve, an expander, a plate heat exchanger and a cold box which are connected in sequence; the cold box is connected with a product supercharger and a storage tank.
Advantageous effects
1. The peak-shaving surplus electric quantity and the heat energy of the nuclear power unit are effectively utilized to meet the requirement of equipment energy supply of the air separation device, the energy consumption of external supplement driving of the air separation device is reduced, the energy waste is avoided, the energy utilization rate is improved, and the modern nuclear power plant is transformed into a comprehensive factory of electric energy, heat energy, compressed air energy and various air separation gas products;
2. surplus cold energy of a cold box in the air separation device is used for refrigerating air-conditioning circulating water, and the air-conditioning circulating water is used for air-conditioning refrigeration of nuclear power plants or nearby buildings;
3. compressed air generated in the air compression process in the air separation device can be used as an industrial driving compressed air source of a nuclear power unit or a nearby industrial park; the method also realizes the storage of electric energy in a phase-changing manner, can supplement the on-line electric quantity of the nuclear power plant, and relieves the problems of power grid balance and peak-valley difference.
Drawings
Fig. 1 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a second embodiment of the present invention;
fig. 3 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a third embodiment of the present invention;
fig. 4 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural view of a peak shaving system of an air separation plant of a nuclear power plant according to a seventh embodiment of the present invention;
FIG. 8 is a schematic view of a specific flow chart of a peak shaving method of an air separation plant of a nuclear power plant.
Description of the reference numerals
For further clarity of explanation of the structure and connections between the various components of the present invention, the following reference numerals are given and described.
A nuclear power unit 1; a nuclear power boiler 11; a large steam turbine 12; a generator 13; a power plant central control system 14; a peak shaving control module 141; a power grid 2; an air separation unit 3; an air compressor 31; a supercharger 32; a pre-cooling system 33; a molecular sieve 34; an expander 35; a plate heat exchanger 36; a cold box 37; a product booster 38; an oxygen press 381; a nitrogen press 382; a storage tank 39; a power grid dispatching center 4; a small steam turbine 5; the auxiliary small turbine 51.
Through the above reference sign explanation, combine the embodiment of the utility model, can more clearly understand and explain the technical scheme of the utility model.
Detailed Description
The present invention is further described below in conjunction with specific embodiments so that those skilled in the art may better understand the present invention and can implement the present invention, but the scope of the present invention is not limited to the scope described in the detailed description. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Example one
A peak shaving system of an air separation device of a nuclear power plant is shown in figure 1 and comprises a nuclear power unit 1, wherein the nuclear power unit comprises a nuclear power boiler 11, a large steam turbine 12, a generator 13 and accessory equipment thereof and a power plant centralized control system 14; the power plant centralized control system 14 comprises a peak shaving control module 141; the peak regulation control module 141 is respectively connected with the generator 13, the power grid 2 and the air separation device 3 to receive a peak regulation instruction of the power grid dispatching center 4, control the operation and stop of the air separation device 3 and meet the peak regulation requirement of the power grid 2 on the nuclear power plant. When the nuclear power unit operates, the nuclear power boiler 11 operates and transmits steam to the large steam turbine 12, the large steam turbine 12 is driven by high-temperature steam to do work and drive the generator 13 to generate electricity, and the peak shaving control module 141 controls the generator 13 to supply electricity to the power grid 2 according to the requirement.
The peak shaving system comprises a small steam turbine 5, and the small steam turbine 5 is connected and communicated with a steam extraction pipeline of a large steam turbine 12 of the nuclear power unit or a main steam pipeline of a power plant, namely a boiler water supply pipeline and a condensate water pipeline of the nuclear power unit; the air separation unit comprises an air compressor 31 and a supercharger 32; the small steam turbine 5 is respectively connected with an air compressor 31 and a supercharger 32; the peak shaving control module can control the steam quantity of the peak shaving steam such as extraction steam or main steam of the large steam turbine 12 supplied to the small steam turbine 5 to drive the small steam turbine 5, and the small steam turbine 5 does work under the driving of the peak shaving steam to drive the rotating assemblies of the air compressor 31 and the supercharger 32 to rotate.
The air separation device adopts any one or combination of cryogenic air separation, pressure swing adsorption or membrane separation to prepare the related gas product of air separation.
Example two
As shown in fig. 2, the configuration of the peak shaving system of the nuclear power plant air separation device provided in the first embodiment is consistent, and the difference is that the air separation device adopts a cryogenic process, and the air separation device further includes a pre-cooling system 33, a molecular sieve 34, an expander 35, a plate heat exchanger 36, and a cold box 37. The air compressor 31, the precooling system 33, the supercharger 32, the molecular sieve 34, the expander 35, the plate heat exchanger 36 and the cold box 37 are connected in sequence. The cold box 37 is connected with a product booster 38 and a storage tank 39.
EXAMPLE III
As shown in fig. 3, the configuration of the peak shaving system of the nuclear power plant air separation plant according to the second embodiment is consistent, except that the product booster includes an oxygen compressor 381 and a nitrogen compressor 382. The storage tank 39 or storage tank cryogenic liquid phase storage device is capable of storing the resulting final air separation products of the air separation plant, such as liquid nitrogen, liquid oxygen, liquid argon, and the like. A product output port is arranged on the cold box 37; the oxygen compressor 381, the nitrogen compressor 382 and the storage tank 39 are connected to a product output port of the cold box 37, and the resulting gas product is separated by a compressed air separation device, so as to obtain a gas product stored in a high-pressure manner, such as a gas product stored in a high-pressure steel cylinder, such as oxygen or nitrogen.
Example four
As shown in fig. 4, the configuration of the peak shaving system of the air separation plant of the nuclear power plant provided in the third embodiment is the same, except that the oxygen compressor 381 and the nitrogen compressor 382 are electrically connected to the generator 13 of the nuclear power plant, and the oxygen compressor 381 and the nitrogen compressor 382 can obtain peak shaving power from the generator 13 through the peak shaving control module. That is, the power of the generator 13 is supplied to the grid 2, and the peak shaving power is supplied to other electric devices in the air separation plant through the peak shaving control module, such as the generator 13 to supply power to the oxygen compressor 381 and the nitrogen compressor 382.
In the non-power-utilization peak period, the peak regulation control module acquires peak regulation steam from the nuclear power unit and conveys the peak regulation steam to the small steam turbine 5 to drive the small steam turbine 5, and the small steam turbine 5 drives the air compressor 31 and the supercharger 32 to perform air compression and pressurization under the driving of the peak regulation steam. The small turbine 5 for driving is respectively and coaxially connected with an air compressor 31 and a supercharger 32; the small turbine 5 for driving is connected to an air compressor 31 and a supercharger 32 via a coupling.
EXAMPLE five
As shown in fig. 5, the configuration of the peak shaving system of the nuclear power plant air separation plant according to the fourth embodiment is the same, except that the peak shaving system further includes an auxiliary small turbine 51, one end of the auxiliary small turbine 51 is connected to the extraction pipe of the large turbine 12 or the main plant steam pipe, the other end is connected to the booster 32, and the small turbine 5 is connected to the air compressor 31.
The air compressor 31 extracts air from the atmosphere, and the air enters the pre-cooling system 33 after being compressed; the low-temperature air passing through the precooling system 33 enters the molecular sieve 34, and the cold air filtered from the molecular sieve 34 enters the supercharger 32 according to the required amount for supercharging; the compressed air from the supercharger 32 enters the expander 35, the cold air from the expander 35 passes through the plate heat exchanger 36 and then reaches the cold box 37, and the separated gas product is obtained in the cold box 37 and sent to the user after being processed. The compressed air product can be stored or transported by a low-temperature liquid phase storage tank, or sent to a user by a booster pressurized high-pressure gas cylinder or a high-pressure pipeline.
Preferably, the expander 35 of the air separation plant is connected to a supercharger or other device requiring rotation of the air separation plant, and the mechanical energy released by the expansion refrigeration process of the expander 35 can be used to drive the supercharger or other device requiring rotation of the air separation plant. The air separation product of the peak regulation system of the air separation device of the nuclear power plant is oxygen, nitrogen, argon or other rare inert gases.
Preferably, at least one of the cold box 37 and the pre-cooling system 33 is communicated with a refrigeration circulating water pipeline of an external air conditioner, and the cold box 37 and the pre-cooling system 33 transfer surplus cold energy to the refrigeration circulating water pipeline of the external air conditioner to refrigerate the air conditioner of a nuclear power plant or a nearby building.
Preferably, the pre-cooling system 33 is connected to the booster 32 to deliver the rich cold air to drive the booster 32.
In the embodiment, the rotating machines such as the air compressor and the supercharger in all the air separation devices are driven by the peak-shaving steam of the power plant, namely, the peak-shaving surplus steam in the non-power-utilization peak period of the power plant is used for providing power for the air separation devices.
EXAMPLE six
As shown in fig. 6, the configuration of the peak shaving system of the nuclear power plant air separation plant according to the fifth embodiment is consistent, except that the peak shaving system is not provided with the small steam turbine 5, and a generator is connected with the air separation plant to supply power to the air separation plant.
The air separation unit comprises an air compressor 31 and a supercharger 32; the air compressor 31 and the supercharger 32 are both connected with the generator 13; the peak shaving control module can tune the electric quantity in the generator 13 to the air compressor 31 and the supercharger 32 to drive the rotating assemblies of the air compressor 31 and the supercharger 32 to rotate.
During the non-power-utilization peak period, the peak-shaving control module acquires peak-shaving power from the nuclear power unit and transmits the peak-shaving power to the air compressor 31 and the supercharger 32 to serve as power sources of the air compressor 31 and the supercharger 32 to perform air compression and supercharging. Namely, the air compressor 31 and the supercharger 32 respectively obtain peak shaving power from the generator 13 through the peak shaving control module.
In this embodiment, all the air separation units are driven by electric power, and all the air separation units utilize the peak shaving surplus electric power in the non-power-consumption peak period of the power plant, that is, the peak shaving surplus electric power in the non-power-consumption peak period of the power plant is utilized to provide power for the air separation units.
EXAMPLE seven
As shown in fig. 7, the configuration of the peak shaving system of the air separation device of the nuclear power plant provided in the fifth embodiment is the same, except that the air separation device in the peak shaving system is connected to a steam pipeline of a nuclear power generating unit to be driven by peak shaving steam of the power plant; on the other hand, the air separation device is connected with a generator so as to supply power to the air separation device by using the generator.
In this embodiment, the air separation device of the peak shaving system is connected to a steam pipeline of the nuclear power plant, the peak shaving control module can pump the extracted steam or main steam and other peak shaving steam of the large steam turbine 12 to the small steam turbine 5 to drive the small steam turbine 5, and the small steam turbine 5 does work under the driving of the peak shaving steam to drive the rotation assemblies of the air compressor and the supercharger to rotate. On the other hand, the air separation unit is connected to the generator 13 and can obtain peak shaving power from the generator 13 via a peak shaving control module.
That is, in the present embodiment, both the peak shaving steam and the peak shaving electric power are used as the power sources for the air compressor 31 and the supercharger 32. In this embodiment, the air separation device adopts two driving modes of electric driving and steam driving, and the air separation device can utilize the peak shaving surplus electric power and the peak shaving surplus steam in the non-power-consumption peak period of the power plant, that is, the peak shaving surplus electric power and the peak shaving surplus steam in the non-power-consumption peak period of the power plant are both used for providing power for the air separation device.
Example eight
The peak shaving system structure of the nuclear power plant air separation plant is consistent with that of the seventh embodiment, except that the air compressor 31 and the supercharger 32 are connected with the nuclear power plant or the industrial park or industrial facility of the adjacent power plant through pipelines. That is, the compressed air generated by the air compression process of the air compressor 31 and the supercharger 32 can be used as the compressed air for driving the air supply of the boiler or the instrument or the pneumatic valve of the nuclear power plant, or the compressed air for driving the industrial in the adjacent industrial park.
The utility model discloses nuclear power plant's air separation plant peak regulation system effectively utilizes peak regulation surplus electric quantity, the heat energy of nuclear power unit to satisfy the equipment energy supply of air separation plant on the one hand, reduces the energy consumption that the external world supplyes the drive air separation plant, avoids the wasting of resources, improves energy utilization, makes the transformation of modern nuclear power plant become the comprehensive mill of electric energy, heat energy, compressed air ability and various air separation gas products; on the other hand, the surplus cold energy of the cold box in the air separation device is used for refrigerating the air-conditioning circulating water, and is used for air-conditioning refrigeration of nuclear power plants or nearby buildings; furthermore, compressed air generated in the air compression process in the air separation device can be used as an industrial driving compressed air source of a nuclear power unit or a nearby industrial park; the method also realizes the storage of electric energy in a phase-changing manner, can supplement the on-line electric quantity of the nuclear power plant, and relieves the problems of power grid balance and peak-valley difference.
Examples one to eight give two peak shaving drive modes for the air separation unit, one being an electric drive mode and the other being a peak shaving steam drive mode.
A peak shaving method of an air separation unit of a nuclear power plant, as shown in fig. 8, wherein the peak shaving method uses the peak shaving system described in the above embodiment, and the peak shaving method specifically comprises the following steps:
s1: the nuclear power plant receives a deep peak-shaving load reduction or load increase instruction of a power grid dispatching center, and the power for increasing or reducing the on-line electricity quantity is the peak-shaving load quantity PPeak regulation(ii) a Wherein, when the power on the network is increased, the load P of peak regulation is increasedPeak regulationIs negative; when the net surfing quantity is reduced, the load quantity P of peak regulationPeak regulationIs positive;
s2: selecting a peak shaving driving mode of the air separation device, and if the peak shaving driving mode is the electric driving mode, executing step S3; if the peak shaving steam driving mode is selected, executing step S4;
s3: the peak regulation control module regulates the power consumption of the air separation device to respond to a peak regulation instruction of a power grid in time, and the specific formula is as follows:
Ppeak regulation＝PAir consumption'-PEmpty consumption 0Wherein: pEmpty consumption 0For the power consumption of the pre-peak air separation plant, PLoss of power' is the power consumed by the air separation unit after peak shaving;
s4: the peak shaving system comprises a steam supply regulating valve which regulates the flow F of the peak shaving steam source supplied to the air separation devicePeak regulation；
Selecting the optimal peak-shaving steam source according to the condition of the peak-shaving system, wherein the flow F of the peak-shaving steam sourcePeak regulationAnd peak load regulation amount PPeak regulationThe relational formula of (A) is as follows:
Fpeak regulation＝0.278*PPeak regulation/(△HRemainder of*ηSteam engine*ηe)
Wherein: pPeak regulationThe peak load is the peak load regulation, unit kW;
△Hremainder ofThe residual enthalpy difference between the extracted steam from the large steam turbine and the exhaust steam enthalpy value is expressed in kJ/kg; wherein steam is extracted before reheatingIn the case of (3), the residual enthalpy difference comprises an increase in enthalpy due to the reheater;
ηsteam engineThe relative internal efficiency of the turbine for large turbines;
ηeto the generator efficiency;
s5: calculation result F according to S4Peak regulationThe opening of the steam supply regulating valve is regulated to provide the peak-shaving steam source flow FPeak regulationAnd response of the thermal power generating unit to the peak regulation instruction of the power grid is realized.
The calculation formula of S4 is an approximate calculation formula, and can be specifically calculated according to the peak-shaving steam source in the following cases:
(1) the peak shaving steam comes from the main steam, then
FPeak regulation＝0.278*PPeak regulation/{[(H0 height-HHigh row)*ηHeight of+(H0 in-HMiddle row)*ηIn+(H0 is low-HLow row)*ηIs low in]*ηe}
(2) The peak-shaving steam comes from the extraction or exhaust steam of the high-pressure cylinder
FPeak regulation＝0.278*PPeak regulation/{[(HHigh suction or high discharge-HHigh row)*ηHeight of+(H0 in-HMiddle row)*ηIn+(H0 is low-HLow row)*ηIs low in]*ηe}
(3) The peak-shaving steam comes from the steam inlet, extraction or exhaust of the intermediate pressure cylinder
FPeak regulation＝0.278*PPeak regulation/{[(H0 middle or middle suction or middle exhaust-HMiddle row)*ηIn+(H0 is low-HLow row)*ηIs low in]*ηe}
In the above formula:
Fpeak regulationThe peak-shaving steam quantity is unit kg/h;
Ppeak regulationThe peak load is the peak load regulation, unit kW;
H0 heightIs the enthalpy value of main steam, and the unit kJ/kg;
Hhigh rowThe enthalpy value of the discharged steam of the high-pressure cylinder is kJ/kg;
ηheight ofThe efficiency of the high-pressure cylinder in the automobile is improved;
H0 inThe enthalpy value of the steam entering the intermediate pressure cylinder is kJ/kg;
Hmiddle rowThe enthalpy value of the exhausted steam of the intermediate pressure cylinder is kJ/kg;
ηinThe efficiency of the steam turbine of the intermediate pressure cylinder is obtained;
H0 is lowThe enthalpy value of the steam entering the low-pressure cylinder is kJ/kg;
Hlow rowThe enthalpy value of the discharged steam of the low-pressure cylinder is kJ/kg;
ηis low inThe efficiency of the low-pressure cylinder in the automobile is obtained;
ηeto the generator efficiency;
in the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "a specific embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application, and exemplary expressions for the terms above do not necessarily refer to the same embodiment or embodiment in the specification. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood by those skilled in the art that although the embodiments of the present invention have been disclosed in the foregoing description, the same is by way of illustration and example only and is not intended to be limiting. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A peak regulation system of an air separation device of a nuclear power plant comprises a nuclear power unit (1), wherein the nuclear power unit (1) comprises a nuclear power boiler (11), a large steam turbine (12), a generator (13) and a power plant centralized control system (14), the power plant centralized control system (14) comprises a peak regulation control module (141), and the peak regulation control module receives a peak regulation instruction of a power grid dispatching center; the peak shaving control system is characterized in that the air separation device (3) is communicated with a generator (13) and/or a steam pipeline of a nuclear power unit, and the peak shaving control module (141) can be used for shaving the power of the generator (13) and/or the steam of the nuclear power unit to the air separation device (3) so as to drive the air separation device (3).
2. A nuclear power plant air separation plant peak shaving system according to claim 1, characterized in that the drive steam of the air separation plant (3) comes from the extraction steam line of a nuclear power plant large steam turbine (12) or the main plant steam line.
3. A nuclear power plant air separation plant peak shaving system according to claim 2, characterized in that the peak shaving system comprises a small turbine (5) of the steam driven air separation plant, which small turbine (5) is in communication with the extraction conduit of the large turbine (12) or the main plant steam conduit.
4. The nuclear power plant air separation plant peak shaving system according to claim 3, wherein the air separation plant includes a compressor; and the small steam turbine (5) is connected with the compressor through a coupler so as to drive the compressor.
5. The nuclear power plant air separation plant peak shaving system according to claim 4, wherein the compressor is an air compressor (31) and/or a booster (32).
6. The nuclear power plant air separation unit peak shaving system according to one of claims 1 to 4, characterized in that the air separation unit (3) comprises a compressor; the generator (13) is connected to the compressor to electrically drive the compressor.
7. The nuclear power plant air separation plant peak shaving system of claim 6, wherein the compressor is at least one of an air compressor (31), a booster (32), and a product booster.
8. A nuclear power plant air separation plant peak shaving system according to claim 7, characterized in that the peak shaving system is further provided with an auxiliary small turbine (51), one end of the auxiliary small turbine (51) is connected with the extraction pipeline of the large turbine (12) or the main plant steam pipeline, the other end is connected with a booster (32), and the small turbine (5) is connected with the air compressor (31).
9. The nuclear power plant air separation unit peak shaving system of claim 8, wherein the compressed air generated by the air compression process of the air separation unit is used as a source of industrial drive compressed air for a nuclear power plant or a nearby industrial park.
10. The nuclear power plant air separation plant peak shaving system of claim 8, wherein the product booster (38) includes an oxygen compressor (381) and/or a nitrogen compressor (382); the air separation device (3) comprises a precooling system (33), a supercharger (32), a molecular sieve (34), an expander (35), a plate type heat exchanger (36) and a cold box (37) which are connected in sequence; the cold box (37) is connected with a product supercharger (38) and a storage tank (39).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113914951A (en) * | 2021-10-15 | 2022-01-11 | 西安热工研究院有限公司 | Nuclear power plant peak regulation system based on compressed air energy storage and operation method |
| CN113914951B (en) * | 2021-10-15 | 2024-01-19 | 西安热工研究院有限公司 | Nuclear power plant peak shaving system based on compressed air energy storage and operation method |
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