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CN113793964A - A thermal power peak shaving system and working method based on solid oxide fuel cells - Google Patents

A thermal power peak shaving system and working method based on solid oxide fuel cells Download PDF

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Publication number
CN113793964A
CN113793964A CN202111064435.9A CN202111064435A CN113793964A CN 113793964 A CN113793964 A CN 113793964A CN 202111064435 A CN202111064435 A CN 202111064435A CN 113793964 A CN113793964 A CN 113793964A
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solid oxide
oxide fuel
fuel cell
cathode
anode
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薛朝囡
许朋江
石慧
张建元
王妍
邓佳
吕凯
温婷
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1231Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/04Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04014Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
    • H01M8/04022Heating by combustion
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for AC mains or AC distribution networks
    • H02J3/24Arrangements for preventing or reducing oscillations of power in networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for AC mains or AC distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/40Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
    • 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
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Power Engineering (AREA)
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  • Electrochemistry (AREA)
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  • General Engineering & Computer Science (AREA)
  • Fuel Cell (AREA)

Abstract

本发明公开了一种基于固体氧化物燃料电池的火电调峰系统及工作方法,本发明通过在机组蒸汽系统中增加固体氧化物燃料电池系统,来提高系统的调频能力:本发明通过用电高峰时通过氢气和氧气的氧化反应补充发电,并将未完全反应的部分燃烧后产生的蒸汽补充至系统,提高系统做功能力,提高机组灵活性;本发明通过用电低谷时通过将机组蒸汽系统中的蒸汽电解进行储能,减少机组供电量,增加调峰深度;本发明使固体氧化物燃料正、逆反应效率均高,能保证整个系统的效率;固体氧化物燃料具有低污染的特点,整个过程中不会产生更多的污染性气体。

Figure 202111064435

The invention discloses a thermal power peak regulation system and a working method based on a solid oxide fuel cell. The present invention improves the frequency regulation capability of the system by adding a solid oxide fuel cell system to the steam system of the unit: At the same time, the power generation is supplemented by the oxidation reaction of hydrogen and oxygen, and the steam generated by the incompletely reacted part of the combustion is supplemented to the system, so as to improve the working ability of the system and improve the flexibility of the unit; The steam electrolysis in the electric power plant can store energy, reduce the power supply of the unit, and increase the depth of peak regulation; the present invention makes the forward and reverse reaction efficiencies of the solid oxide fuel high, and can ensure the efficiency of the entire system; the solid oxide fuel has the characteristics of low pollution, and the whole No more polluting gases are produced during the process.

Figure 202111064435

Description

Thermal power peak regulation system based on solid oxide fuel cell and working method
Technical Field
The invention belongs to the field of thermal power generation, and particularly relates to a thermal power peak regulation system based on a solid oxide fuel cell and a working method.
Background
With the rapid development of economy and the improvement of the living standard of people, the electricity utilization structure is greatly changed, and the valley-peak difference of the power grid is increased day by day; in addition, the generated energy of new energy such as wind power, photovoltaic and the like is rapidly increased, the requirements on the peak regulation capacity and the operation flexibility of the thermal power generating unit are higher and higher, and more thermal power generating units with high parameters and large capacity are responsible for peak regulation of a power grid. But limited by the lowest stable combustion load and the like, the participating peak shaving depth of the large-scale unit is limited. How to make the thermal power generating unit have better peak regulation depth to adapt to the requirement of new energy rapid development under the premise of ensuring the peak regulation safety of the unit is a problem to be solved urgently in the power industry.
In recent years, in order to improve the peak regulation depth of a unit, not only is the unit system modified, such as low-pressure cylinder zero-output modification which is widely applied recently, but also an auxiliary system is added to the original system to improve the peak regulation depth, such as a lava heat storage system and a flywheel energy storage system are added.
Disclosure of Invention
The invention aims to overcome the defects and provides a thermal power peak regulating system based on a solid oxide fuel cell and a working method thereof.
In order to achieve the purpose, the thermal power peak regulation system based on the solid oxide fuel cell comprises the solid oxide fuel cell, wherein the cathode of the solid oxide fuel cell is connected with a hydrogen tank and a reheat steam outlet pipe, the anode of the solid oxide fuel cell is connected with an oxygen tank, the solid oxide fuel cell is connected with an inverter, and the inverter is connected with a generator.
The cathode and the anode of the solid oxide fuel cell are both connected with the catalytic combustor.
A cathode heat exchanger is arranged on a pipeline between the hydrogen tank and the cathode of the solid oxide fuel cell, and an anode heat exchanger is arranged on a pipeline between the oxygen tank and the anode of the solid oxide fuel cell.
High-temperature steam discharged from the catalytic combustion chamber is used as a heat source and sent into the cathode heat exchanger and the anode heat exchanger.
And heat sources after heat exchange in the cathode heat exchanger and the anode heat exchanger are sent into the low-pressure cylinder through pipelines.
The reheat steam is led out from the reheat steam side of the boiler.
A working method of a thermal power peak regulation system based on a solid oxide fuel cell comprises the following steps:
when the unit is in a peak power consumption state, hydrogen stored in the hydrogen tank is sent to the cathode of the solid oxide fuel cell, oxygen stored in the oxygen tank is sent to the anode of the solid oxide fuel cell, the solid oxide fuel cell performs a power generation reaction, and the generated electricity is supplemented to the generator for power generation through the inverter;
when the unit is in the electricity consumption valley, the reheated steam is sent to the cathode of the solid oxide fuel cell to carry out reverse reaction, electricity is taken from the generator through the inverter to be supplied to the solid oxide fuel cell as electricity for the reheated steam electrolysis, hydrogen generated by the cathode of the electrolyzed solid oxide fuel cell is stored in the hydrogen tank, and oxygen generated by the anode is stored in the oxygen tank.
And high-temperature steam discharged from the catalytic combustion chamber is used as a heat source for preheating hydrogen and oxygen and is respectively sent into the cathode heat exchanger and the anode heat exchanger.
And heat sources after heat exchange in the cathode heat exchanger and the anode heat exchanger are converged into a low-pressure cylinder of the steam turbine to do work.
Compared with the prior art, the invention improves the frequency modulation capability of the system by adding the solid oxide fuel cell system in the unit steam system: according to the invention, the power generation is supplemented through the oxidation reaction of hydrogen and oxygen at the power consumption peak, and the steam generated after the incompletely-reacted part is combusted is supplemented to the system, so that the work capacity of the system is improved, and the flexibility of a unit is improved; according to the invention, energy is stored by electrolyzing steam in the steam system of the unit during the power consumption valley, so that the power supply amount of the unit is reduced, and the peak regulation depth is increased; the invention ensures that the positive reaction efficiency and the reverse reaction efficiency of the solid oxide fuel are high, and the efficiency of the whole system can be ensured; the solid oxide fuel has the characteristic of low pollution, and no more polluting gas is generated in the whole process.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
the fuel cell comprises a solid oxide fuel cell 1, a cathode 2, a hydrogen tank 3, a hydrogen tank 4, an anode 5, an inverter 6, a generator 7, an oxygen tank 8, a catalytic combustion chamber 9, a cathode heat exchanger 10, an anode heat exchanger 11, a low-pressure cylinder 12 and a boiler.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the thermal power peak-shaving system based on the solid oxide fuel cell comprises a solid oxide fuel cell 1, wherein a cathode 2 of the solid oxide fuel cell 1 is connected with a hydrogen tank 3 and a reheat steam outlet pipe, reheat steam is led out from the reheat steam side of a boiler 12 (the temperature exceeds 600 ℃), an anode 4 of the solid oxide fuel cell 1 is connected with an oxygen tank 7, the solid oxide fuel cell 1 is connected with an inverter 5, and the inverter 5 is connected with a generator 6. The cathode 2 and the anode 4 of the solid oxide fuel cell 1 are both connected to a catalytic combustor 8. A cathode heat exchanger 9 is arranged on a pipeline between the hydrogen tank 3 and the cathode 2 of the solid oxide fuel cell 1, and an anode heat exchanger 10 is arranged on a pipeline between the oxygen tank 7 and the anode 4 of the solid oxide fuel cell 1. The high-temperature steam discharged from the catalytic combustor 8 is used as a heat source and sent to the cathode heat exchanger 9 and the anode heat exchanger 10. And heat sources after heat exchange in the cathode heat exchanger 9 and the anode heat exchanger 10 are sent into the low-pressure cylinder 11 through pipelines, so that the generating capacity of the steam turbine is improved.
A working method of a thermal power peak regulation system based on a solid oxide fuel cell comprises the following steps:
when the unit is in a peak power utilization state, hydrogen stored in the hydrogen tank 3 is sent to the cathode 2 of the solid oxide fuel cell 1, oxygen stored in the oxygen tank 7 is sent to the anode 4 of the solid oxide fuel cell 1, the solid oxide fuel cell 1 carries out power generation reaction, and the generated electricity supplements the generator 6 to generate electricity through the inverter 5; the incomplete combustion products enter the catalytic combustion chamber 8 when the solid oxide fuel cell 1 performs power generation reaction, and high-temperature steam discharged from the catalytic combustion chamber 8 is used as heat sources for preheating hydrogen and oxygen and is respectively sent into the cathode heat exchanger 9 and the anode heat exchanger 10. The heat source after heat exchange in the cathode heat exchanger 9 and the anode heat exchanger 10 is converged into a low-pressure cylinder 11 of the steam turbine to do work.
When the unit is in the electricity consumption valley, the reheated steam is sent to the cathode 2 of the solid oxide fuel cell 1 to perform reverse reaction, electricity is taken from the generator 6 through the inverter 5 to be supplied to the solid oxide fuel cell 1 as electricity for the reheated steam electrolysis, hydrogen generated by the cathode 2 of the solid oxide fuel cell 1 after the electrolysis is stored in the hydrogen tank 2, and oxygen generated by the anode 4 is stored in the oxygen tank 7.

Claims (9)

1.一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,包括固体氧化物燃料电池(1),固体氧化物燃料电池(1)的阴极(2)连接氢气罐(3)和再热蒸汽引出管,固体氧化物燃料电池(1)的阳极(4)连接氧气罐(7),固体氧化物燃料电池(1)连接逆变器(5),逆变器(5)连接发电机(6)。1. A thermal power peak regulation system based on a solid oxide fuel cell, characterized in that, comprising a solid oxide fuel cell (1), and a cathode (2) of the solid oxide fuel cell (1) is connected to a hydrogen tank (3) and The reheat steam extraction pipe, the anode (4) of the solid oxide fuel cell (1) is connected to the oxygen tank (7), the solid oxide fuel cell (1) is connected to the inverter (5), and the inverter (5) is connected to power generation machine (6). 2.根据权利要求1所述的一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,固体氧化物燃料电池(1)的阴极(2)和阳极(4)均连接催化燃烧室(8)。2. A thermal power peak-shaving system based on solid oxide fuel cell according to claim 1, characterized in that the cathode (2) and the anode (4) of the solid oxide fuel cell (1) are both connected to a catalytic combustion chamber (8). 3.根据权利要求2所述的一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,氢气罐(3)与固体氧化物燃料电池(1)阴极(2)间的管路上设置有阴极换热器(9),氧气罐(7)与固体氧化物燃料电池(1)阳极(4)间的管路上设置有阳极换热器(10)。3. A thermal power peak regulation system based on solid oxide fuel cell according to claim 2, characterized in that, a pipeline between the hydrogen tank (3) and the cathode (2) of the solid oxide fuel cell (1) is provided with There is a cathode heat exchanger (9), and an anode heat exchanger (10) is arranged on the pipeline between the oxygen tank (7) and the anode (4) of the solid oxide fuel cell (1). 4.根据权利要求3所述的一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,催化燃烧室(8)排出的高温蒸汽作为热源送入阴极换热器(9)和阳极换热器(10)中。4. A thermal power peak-shaving system based on solid oxide fuel cells according to claim 3, characterized in that, the high-temperature steam discharged from the catalytic combustion chamber (8) is sent to the cathode heat exchanger (9) and the anode as a heat source in the heat exchanger (10). 5.根据权利要求3所述的一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,阴极换热器(9)和阳极换热器(10)中换热后的热源通过管路送入低压缸(11)中。5. A thermal power peak-shaving system based on solid oxide fuel cells according to claim 3, characterized in that, the heat source after heat exchange in the cathode heat exchanger (9) and the anode heat exchanger (10) passes through a pipe into the low pressure cylinder (11). 6.根据权利要求3所述的一种基于固体氧化物燃料电池的火电调峰系统,其特征在于,再热蒸汽从锅炉(12)再热蒸汽侧引出。6. A thermal power peak regulation system based on solid oxide fuel cells according to claim 3, characterized in that the reheated steam is drawn from the reheated steam side of the boiler (12). 7.权利要求1所述的一种基于固体氧化物燃料电池的火电调峰系统的工作方法,其特征在于,包括以下步骤:7. The working method of a solid oxide fuel cell-based thermal power peak-shaving system according to claim 1, characterized in that, comprising the following steps: 当机组处于用电高峰时,氢气罐(3)中存储的氢气送入固体氧化物燃料电池(1)的阴极(2),氧气罐(7)中存储的氧气送入固体氧化物燃料电池(1)的阳极(4),固体氧化物燃料电池(1)进行发电反应,发出来的电通过逆变器(5)补充发电机(6)发电;When the unit is at the peak of electricity consumption, the hydrogen stored in the hydrogen tank (3) is sent to the cathode (2) of the solid oxide fuel cell (1), and the oxygen stored in the oxygen tank (7) is sent to the solid oxide fuel cell ( In the anode (4) of 1), the solid oxide fuel cell (1) performs a power generation reaction, and the generated electricity passes through the inverter (5) to supplement the generator (6) to generate electricity; 当机组处于用电低谷时,再热蒸汽送入固体氧化物燃料电池(1)的阴极(2),进行逆反应,从发电机(6)处通过逆变器(5)取电供固体氧化物燃料电池(1),作为再热蒸汽电解用电,电解后固体氧化物燃料电池(1)的阴极(2)产生的氢气储存至氢气罐(2),阳极(4)产生的氧气储存至氧气罐(7)。When the unit is at a low power consumption point, the reheated steam is sent to the cathode (2) of the solid oxide fuel cell (1) to carry out the reverse reaction, and electricity is drawn from the generator (6) through the inverter (5) to supply the solid oxide fuel The fuel cell (1) is used as electricity for reheating steam electrolysis, the hydrogen produced by the cathode (2) of the solid oxide fuel cell (1) after electrolysis is stored in the hydrogen tank (2), and the oxygen produced by the anode (4) is stored in the oxygen Tank (7). 8.根据权利要求7所述的一种基于固体氧化物燃料电池的火电调峰系统的工作方法,其特征在于,固体氧化物燃料电池(1)进行发电反应时不完全燃烧产物进入催化燃烧室(8),催化燃烧室(8)排出的高温蒸汽作为氢气和氧气预热的热源分别送入阴极换热器(9)和阳极换热器(10)中。8. The working method of a thermal power peak-shaving system based on solid oxide fuel cells according to claim 7, wherein the incomplete combustion products enter the catalytic combustion chamber when the solid oxide fuel cell (1) performs a power generation reaction (8), the high temperature steam discharged from the catalytic combustion chamber (8) is sent to the cathode heat exchanger (9) and the anode heat exchanger (10) respectively as a heat source for hydrogen and oxygen preheating. 9.根据权利要求8所述的一种基于固体氧化物燃料电池的火电调峰系统的工作方法,其特征在于,阴极换热器(9)和阳极换热器(10)中换热后的热源汇入汽轮机低压缸(11)做功。9. The working method of a solid oxide fuel cell-based thermal power peak-shaving system according to claim 8, characterized in that, after heat exchange in the cathode heat exchanger (9) and the anode heat exchanger (10) The heat source is fed into the low-pressure cylinder (11) of the steam turbine to do work.
CN202111064435.9A 2021-09-10 2021-09-10 A thermal power peak shaving system and working method based on solid oxide fuel cells Pending CN113793964A (en)

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CN114774956A (en) * 2022-05-06 2022-07-22 西安热工研究院有限公司 Energy storage peak regulation system and method based on solid oxide hydrogen production
CN115172801A (en) * 2022-07-21 2022-10-11 西安交通大学 Solid oxide fuel cell and photo-thermal utilization integrated system and method
CN115172801B (en) * 2022-07-21 2024-03-12 西安交通大学 Solid oxide fuel cell and photo-thermal utilization integrated system and method

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