CN217334159U - Zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for LNG receiving station - Google Patents

Zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for LNG receiving station Download PDF

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CN217334159U
CN217334159U CN202220619278.7U CN202220619278U CN217334159U CN 217334159 U CN217334159 U CN 217334159U CN 202220619278 U CN202220619278 U CN 202220619278U CN 217334159 U CN217334159 U CN 217334159U
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fuel cell
reversible fuel
power generation
temperature
supply device
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张超
姚辉超
王秀林
侯建国
隋依言
宋鹏飞
张瑜
段品佳
穆祥宇
侯海龙
周树辉
张雨晴
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CNOOC Gas and Power Group Co Ltd
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CNOOC Gas and Power Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The utility model discloses a be used for zero carbon of LNG receiving station to arrange reversible fuel cell energy supply/energy storage system of high temperature. The structure of the energy supply/storage system is as follows: a natural gas inlet of the natural gas reforming device is connected with the LNG storage tank, a product outlet is connected with an anode of the high-temperature reversible fuel cell power generation and supply device, and a cathode of the high-temperature reversible fuel cell power generation and supply device is connected with an oxygen/air inlet pipeline; the raw material inlet of the high-temperature reversible fuel cell electrolysis energy storage device is connected with a tail gas discharge pipeline of the high-temperature reversible fuel cell power generation and supply device, and the product gas outlet is connected with the anode of the high-temperature reversible fuel cell power generation and supply device; the high-temperature reversible fuel cell electrolysis energy storage device is powered by offshore wind power; the high-temperature reversible fuel cell power generation and supply device supplies power to the LNG receiving station. The utility model discloses the heat energy of the reversible fuel cell electricity generation energy supply device byproduct of make full use of high temperature realizes the dynamic balance of the system with the heat demand, promotes system energy utilization greatly.

Description

Zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for LNG receiving station
Technical Field
The utility model relates to a be used for zero carbon of LNG receiving station to arrange reversible fuel cell energy supply/energy storage system of high temperature belongs to the reversible fuel cell energy supply of high temperature and energy storage technical field.
Background
Liquefied Natural Gas (LNG) is a clean and efficient fossil energy, the liquefied natural gas in China is mainly transported to China from overseas through ocean trade, dozens of liquefied natural gas receiving stations are built in various places along the sea in China, the liquefied natural gas receiving stations have the main function of receiving the liquefied natural gas and storing the liquefied natural gas in large LNG storage tanks, then the liquefied natural gas is changed into gaseous natural gas by using a gasification system, and the clean and efficient natural gas is provided through an external transportation pipeline of a pressurization system. Nevertheless, LNG receiving stations have a large demand for electricity, and for example, an LNG receiving station with an annual processing capacity of 600 ten thousand tons has an annual electricity consumption of about 1.5 million degrees and an indirect carbon dioxide emission of about 10 ten thousand tons. In addition, BOG (Boil Off Gas) is inevitably formed in the low-temperature characteristics of Liquefied Natural Gas (LNG), and the daily evaporation rate of a large LNG storage tank is generally 0.03 to 0.08 mass%. Especially, the amount of BOG generated in large LNG storage tanks is considerable, special equipment needs to be arranged to process the BOG, and a large amount of extra power consumption needs to be consumed. Under the background of 'carbon peak reaching' and 'carbon neutralization' double-carbon, how to make the LNG receiving station cleaner and lower carbon is achieved to optimize the power consumption requirement of the LNG receiving station and realize energy conservation and consumption reduction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel reversible energy supply of high temperature and energy storage system are arranged to clean efficient zero carbon of LNG receiving station adopts the reversible solid oxide fuel cell electricity generation of high temperature as fuel to provide stable power supply for the LNG receiving station, utilizes marine wind power generation to adopt the reversible solid oxide electrolytic cell of high temperature to electrolyze water altogether and carbon dioxide to obtain carbon monoxide and hydrogen again as the power generation fuel simultaneously.
The utility model provides a zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for an LNG receiving station, which comprises a natural gas reforming device, a high-temperature reversible fuel cell power generation and supply device and a high-temperature reversible fuel cell electrolysis energy storage device;
the natural gas reforming device is provided with a natural gas inlet, a steam inlet and a product outlet, wherein the natural gas inlet is connected with an LNG storage tank and used for enabling BOG generated by the LNG storage tank to enter the natural gas reforming device, the product outlet is connected with the anode of the high-temperature reversible fuel cell power generation and supply device, and the cathode of the high-temperature reversible fuel cell power generation and supply device is connected with an oxygen/air inlet pipeline;
a raw material inlet of the high-temperature reversible fuel cell electrolysis energy storage device is connected with a tail gas discharge pipeline of the high-temperature reversible fuel cell power generation and supply device, and a product gas outlet is connected with an anode of the high-temperature reversible fuel cell power generation and supply device;
the high-temperature reversible fuel cell electrolysis energy storage device is powered by offshore wind power;
the high-temperature reversible fuel cell power generation and supply device supplies power to the LNG receiving station;
the heat of the fuel cell energy supply/storage system is derived from the waste heat generated by the high-temperature reversible fuel cell power generation and supply device.
In the above fuel cell energy supply/storage system, a natural gas purification device is disposed on a connection pipeline between the LNG storage tank and the natural gas reforming device, so as to desulfurize the BOG.
In the above fuel cell energy supply/storage system, the LNG storage tank is connected with the connecting pipeline of the natural gas purification device, the natural gas purification device is connected with the connecting pipeline of the natural gas reforming device, and the natural gas purification device is connected with the waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device, so as to utilize the waste heat generated by the high-temperature reversible fuel cell power generation and supply device.
In the above fuel cell energy supply/storage system, the steam inlet of the natural gas reforming device is connected to the steam generator;
and the inlet pipeline of the steam generator is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device so as to heat water by using waste heat generated by the high-temperature reversible fuel cell power generation and supply device to obtain water vapor.
In the above fuel cell energy supply/storage system, the oxygen/air inlet pipeline is connected to a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device, so as to heat air or oxygen by using waste heat generated by the high-temperature reversible fuel cell power generation and supply device.
In the above fuel cell energy supply/storage system, the tail gas exhaust pipeline of the high-temperature reversible fuel cell power generation and supply device is provided with a tail gas concentration device, so as to concentrate the tail gas generated in the power generation process of the high-temperature reversible fuel cell power generation and supply device.
In the above fuel cell energy supply/storage system, the product gas outlet pipeline of the high-temperature reversible fuel cell electrolysis energy storage device is joined with the product outlet pipeline of the natural gas reforming device and then connected with the high-temperature reversible fuel cell power generation and supply device.
When the fuel cell energy supply/storage system is used for supplying power to the LNG receiving station, the method can be carried out according to the following steps:
BOG (the main component is natural gas) from the LNG storage tank enters the natural gas reforming device after being heated and purified, and the BOG and the introduced steam are subjected to conversion reaction to obtain reformed gas (the main components are carbon monoxide and hydrogen);
the mixed gas of the reformed gas and the carbon monoxide and the hydrogen from the high-temperature reversible fuel cell electrolysis energy storage device enters the anode of the high-temperature reversible fuel cell power generation and supply device to generate electric power to supply power for the LNG receiving station and generate surplus heat at the same time; air or oxygen enters the cathode of the high-temperature reversible fuel cell power generation and supply device after being heated, and oxygen is obtained as O generated by electrons 2- The electrolyte reaches the anode and reacts with carbon monoxide and hydrogen respectively to generate carbon dioxide and water, and electrons are lost, so that the power generation process of the high-temperature reversible fuel cell power generation and supply device is completed;
tail gas generated in the power generation process of the high-temperature reversible fuel cell power generation and supply device enters the high-temperature reversible fuel cell electrolysis energy storage device for electrolysis, and obtained carbon monoxide and hydrogen are mixed with the reformed gas;
the high-temperature reversible fuel cell electrolysis energy storage device is powered by offshore wind power.
In the method, the temperature of the BOG is-155 ℃ to-120 ℃;
the BOG is heated to 200-250 ℃ by waste heat from the high-temperature reversible fuel cell power generation and supply device and then subjected to desulfurization treatment, and then heated to 380-480 ℃ by waste heat from the high-temperature reversible fuel cell power generation and supply device and then enters the natural gas reforming device;
the water is heated by the waste heat from the high-temperature reversible fuel cell power generation and supply device to obtain steam with the temperature of 320-420 ℃.
In the method, the temperature at the cathode of the high-temperature reversible fuel cell power generation and supply device is 600-800 ℃;
the electrolysis temperature of the high-temperature reversible fuel cell electrolysis energy storage device is 600-800 ℃.
The utility model discloses owing to take above technical scheme, it has following advantage:
(1) the utility model discloses system make full use of liquefied natural gas's BOG is the electricity generation basic material, and the energy that liquefies BOG again is reduced greatly, for the BOG utilization of LNG receiving station opens up new route.
(2) The utility model discloses set up reversible fuel cell energy supply of high temperature and energy storage system, this system contains reversible fuel cell electricity generation energy supply device of many high temperatures and the reversible fuel cell electrolysis energy storage device of high temperature, because above device has reversible function, can carry out corresponding conversion according to LNG receiving station power consumption load and marine wind-powered electricity generation's scale, guarantees that energy supply and energy storage system are steady.
(3) The utility model discloses the carbon dioxide emission problem of natural gas power generation has been solved to the system to carbon dioxide and vapor that the reaction generated are the raw materials, utilize offshore wind power electrolysis to obtain carbon monoxide and hydrogen, further provide the raw materials for natural gas power generation, changing waste into valuables has realized that process system material utilization is showing and has promoted.
(4) The utility model discloses the system design heat utilization network, the heat energy of the reversible fuel cell electricity generation energy supply device byproduct of make full use of high temperature realizes the dynamic balance of system's heat demand, the energy utilization of lift system greatly.
Drawings
Fig. 1 is the utility model discloses a structural schematic diagram that is used for zero carbon of LNG receiving station to arrange reversible fuel cell energy supply/energy storage system of high temperature.
The respective symbols in the figure are as follows:
the system comprises an LNG storage tank 1, a natural gas purification device 2, a natural gas reforming device 3, a high-temperature reversible fuel cell power generation and supply device 4, a tail gas concentration device 5, a high-temperature reversible fuel cell electrolysis energy storage device 6, an offshore wind power supply device 7 and a steam generation device 8.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
As shown in fig. 1, the utility model provides a novel high temperature reversible energy supply of zero carbon row of clean efficient LNG receiving station and energy storage system's structural schematic diagram, including LNG storage tank 1, natural gas purifier 2, natural gas reforming unit 3, the reversible fuel cell electricity generation energy supply device 4 of high temperature, tail gas enrichment facility 5, the reversible fuel cell electrolysis energy storage device 6 of high temperature, marine wind power supply device 7 and steam generation device 8.
The LNG storage tank 1, the natural gas purification device 2 and the natural gas reforming device 3 are sequentially connected, a steam inlet of the natural gas reforming device 3 is connected with the steam generating device 8, a product gas outlet is connected with an anode of the high-temperature reversible fuel cell power generation and supply device 4, and a cathode of the high-temperature reversible fuel cell power generation and supply device 4 is connected with an oxygen/air inlet pipeline. The raw material inlet of the high-temperature reversible fuel cell electrolysis energy storage device 6 is connected with the tail gas discharge pipeline of the high-temperature reversible fuel cell power generation and supply device 4, the tail gas discharge pipeline is connected with the tail gas concentration device 5, and the product gas outlet of the high-temperature reversible fuel cell electrolysis energy storage device 6 is converged with the product gas outlet of the natural gas purification device 2. The offshore wind power supplies power to the high-temperature reversible fuel cell electrolysis energy storage device 6 after passing through the offshore wind power supply device 7.
The utility model discloses fuel cell energy supply/energy storage system's heat comes from the waste heat that the reversible fuel cell electricity generation energy supply device of high temperature 4 produced, realizes the heat supply through following cooperation:
the pipeline between the LNG storage tank 1 and the natural gas purification device 2 is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device 4, and is used for receiving waste heat Q1 and heating BOG.
The pipeline between the natural gas purification device 2 and the natural gas reforming device 3 is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device 4, and is used for receiving waste heat Q3 and heating natural gas.
An oxygen/air inlet pipeline connected with the cathode of the high-temperature reversible fuel cell power generation and supply device 4 is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device 4, and is used for receiving waste heat Q4 and heating air/oxygen.
An inlet pipeline of the steam generating device 8 is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device 4, and is used for receiving waste heat Q4 and heating water to obtain water vapor.
The utility model discloses clean efficient LNG receiving station zero carbon row novel high temperature reversible energy supply and energy storage system's working process as follows:
using 1000Nm 3 BOG gas volatilized by an LNG storage tank with the temperature of minus 130 ℃ is heated to 214 ℃ through waste heat Q1 from the high-temperature reversible fuel cell power generation and supply device 4, enters the natural gas purification device 2 for desulfurization, and is heated to 413 ℃ through waste heat Q3 from the high-temperature reversible fuel cell power generation and supply device 4. The steam generator 8 obtains waste heat Q2 of the high-temperature reversible fuel cell power generation and supply device 4, and heats water from the outside to obtain water vapor with 385 ℃. The heated natural gas and 2140kg/h of steam are mixed together and enter the natural gas reforming device 3 to carry out conversion reaction to obtain reformed gas (the main components are carbon monoxide and hydrogen).
5000Nm 3 The air/h is heated by waste heat Q4 from the high-temperature reversible fuel cell power generation and supply device 4 and then enters the cathode of the high-temperature reversible fuel cell power generation and supply device 4 (the reaction temperature is 720 ℃). According to the gradual decreasing proportion of 1:1 to 1:5, the reformed gas and the carbon monoxide and the hydrogen from the high-temperature reversible fuel cell electrolysis energy storage device are mixed and enter the anode of the high-temperature reversible fuel cell power generation and supply device 4 to generate stable power of 0.5MW to 2MW, and simultaneously generate surplus heat of 0.4MW to 1.5MW, thereby providing a heat source for the system of the utility model.
The tail gas generated in the power generation process of the high-temperature reversible fuel cell power generation and supply device 4 passes through the tail gas concentration device 5 to obtain carbon dioxide and water vapor with high purity, and then enters the high-temperature reversible fuel cell electrolysis energy storage device 6 (the reaction temperature is 720 ℃). 5MW offshore wind power supplies electric energy to the high-temperature reversible fuel cell electrolysis energy storage device 6 through the offshore wind power supply device 7, and electrolyzes the carbon dioxide and the vapor entering the high-temperature reversible fuel cell electrolysis energy storage device to obtain carbon monoxide and hydrogen, and then mixes the carbon monoxide and the hydrogen with the reformed gas according to a certain proportion to the high-temperature reversible fuel cell power generation energy supply device 4 to convert the carbon dioxide and the vapor into stable electric energy.

Claims (7)

1. A zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for an LNG receiving station comprises a natural gas reforming device, a high-temperature reversible fuel cell power generation and supply device and a high-temperature reversible fuel cell electrolysis energy storage device; the method is characterized in that:
the natural gas reforming device is provided with a natural gas inlet, a steam inlet and a product outlet, wherein the natural gas inlet is connected with an LNG storage tank and used for enabling BOG generated by the LNG storage tank to enter the natural gas reforming device, the product outlet is connected with the anode of the high-temperature reversible fuel cell power generation and supply device, and the cathode of the high-temperature reversible fuel cell power generation and supply device is connected with an oxygen/air inlet pipeline;
a raw material inlet of the high-temperature reversible fuel cell electrolysis energy storage device is connected with a tail gas discharge pipeline of the high-temperature reversible fuel cell power generation and supply device, and a product gas outlet is connected with an anode of the high-temperature reversible fuel cell power generation and supply device;
the high-temperature reversible fuel cell electrolysis energy storage device is powered by offshore wind power;
the high-temperature reversible fuel cell power generation and supply device supplies power to the LNG receiving station;
the heat of the fuel cell energy supply/storage system is derived from the waste heat generated by the high-temperature reversible fuel cell power generation and supply device.
2. The fuel cell energy supply/storage system of claim 1, wherein: and a natural gas purification device is arranged on a connecting pipeline between the LNG storage tank and the natural gas reforming device.
3. The fuel cell energy supply/storage system of claim 2, wherein: the LNG storage tank with natural gas purifier's connecting line natural gas purifier with natural gas reformer's connecting line all with the reversible fuel cell electricity generation energy supply device's of high temperature waste heat recovery pipeline is connected.
4. A fuel cell powered/stored energy system according to any of claims 1-3, characterized in that: the steam inlet of the natural gas reforming device is connected with a steam generator;
and the inlet pipeline of the steam generator is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device.
5. The fuel cell energy supply/storage system of claim 4, wherein: and the oxygen/air inlet pipeline is connected with a waste heat recovery pipeline of the high-temperature reversible fuel cell power generation and supply device.
6. The fuel cell energy supply/storage system of claim 4, wherein: and a tail gas exhaust pipeline of the high-temperature reversible fuel cell power generation and supply device is provided with a tail gas concentration device.
7. The fuel cell energy supply/storage system of claim 6, wherein: and a product gas outlet pipeline of the high-temperature reversible fuel cell electrolysis energy storage device is converged with a product outlet pipeline of the natural gas reforming device and then is connected with the high-temperature reversible fuel cell power generation and supply device.
CN202220619278.7U 2022-03-21 2022-03-21 Zero-carbon-emission high-temperature reversible fuel cell energy supply/storage system for LNG receiving station Active CN217334159U (en)

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