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An integrated coal gasification fuel cell power generation system and method utilizing high temperature sensible heat of coal gas

An integrated coal gasification and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as loss of power generation capacity, and achieve the effects of reducing volume, easy sequential startup, and simplifying system processes

Active Publication Date: 2019-01-04
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

700°C advanced ultra-supercritical coal-fired units and high-parameter IGCC can greatly improve the net efficiency of coal-based power generation technology, but there are still bottlenecks in the distance from commercial demonstration of 700°C advanced ultra-supercritical coal-fired units
This process involves the conversion of high-temperature sensible heat of gas into steam heat energy, which will inevitably result in loss of power generation capacity

Method used

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  • An integrated coal gasification fuel cell power generation system and method utilizing high temperature sensible heat of coal gas
  • An integrated coal gasification fuel cell power generation system and method utilizing high temperature sensible heat of coal gas
  • An integrated coal gasification fuel cell power generation system and method utilizing high temperature sensible heat of coal gas

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Embodiment 1

[0041] Embodiment 1: Utilize high temperature sensible heat of coal gas to heat cathode air

[0042] see figure 1 As shown, the present invention is an integrated coal gasification fuel cell power generation system utilizing high temperature sensible heat of coal gas. The system flow is as follows:

[0043] The raw coal is pulverized and dried in the coal preparation unit 1 to form dry coal powder, and the high-pressure nitrogen at the outlet of the nitrogen compressor 29 is transported to the gasifier 2. The pressurized steam is sent to the gasification furnace 2 for reaction at the same time. The bottom of the gasification furnace 2 produces slag, and the high-temperature crude gas generated at the top is mixed with the low-temperature gas at the outlet of the circulating gas compressor 5. After being chilled, it is sent to the waste heat boiler 3; The heat released inside is used to heat the air exiting from the cold side of the cathode regenerator 22, and the heated air i...

Embodiment 2

[0044] Embodiment 2: Utilize high temperature sensible heat of coal gas to heat cathode air

[0045] see figure 2 As shown, the present invention is an integrated coal gasification fuel cell power generation system utilizing high temperature sensible heat of coal gas. The system flow is as follows:

[0046] The raw coal is pulverized and dried in the coal preparation unit 1 to form dry coal powder, and the high-pressure nitrogen at the outlet of the nitrogen compressor 29 is transported to the gasifier 2. The pressurized steam is sent to the gasification furnace 2 for reaction at the same time. The bottom of the gasification furnace 2 produces slag, and the high-temperature crude gas generated at the top is mixed with the low-temperature gas at the outlet of the circulating gas compressor 5. After being chilled, it is sent to the waste heat boiler 3; The heat released inside is used to heat the air exiting from the cold side of the cathode regenerator 22, and the heated air ...

Embodiment 3

[0047] Embodiment 3: Utilize high temperature sensible heat of coal gas to heat cathode air and fuel gas

[0048] see image 3 As shown, the present invention is an integrated coal gasification fuel cell power generation system utilizing high temperature sensible heat of coal gas. The system flow is as follows:

[0049] The raw coal is pulverized and dried in the coal preparation unit 1 to form dry coal powder, and the high-pressure nitrogen at the outlet of the nitrogen compressor 29 is transported to the gasifier 2. The pressurized steam is sent to the gasification furnace 2 for reaction at the same time. The bottom of the gasification furnace 2 produces slag, and the high-temperature crude gas generated at the top is mixed with the low-temperature gas at the outlet of the circulating gas compressor 5. After being chilled, it is sent to the waste heat boiler 3; The heat released inside is used to heat the air exiting from the cold side of the cathode regenerator 22, and the...

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Abstract

The invention discloses an integrated coal gasification fuel cell power generation system and method utilizing high-temperature sensible heat of coal gas, which comprises a waste heat boiler, an ejector, a fuel cell and a cathode regenerator. As that high temperature sensible heat of the gas is utilize to directly heat the cathode air, the fuel gas needed for maintain the operating temperature inthe fuel cell is saved, the high temperature sensible heat of the gas is avoided to be converted into steam, the steam turbine generate electricity, and the net power generation efficiency of the system is improved; Cathode air is directly heated by high temperature sensible heat of coal gas, which reduces the volume of cathode regenerator, avoids the correlation between gas cooling process and steam power generation process, simplifies the system flow, and is easy to realize the sequential start-up of the system. The invention effectively improves the net power generation efficiency of the IGFC under the premise of ensuring the reasonable cost of the equipment, and solves the problems existing in the prior art.

Description

technical field [0001] The invention belongs to the technical field of clean coal power generation, in particular to an integral coal gasification fuel cell power generation system. Background technique [0002] Coal is the most important basic energy in my country, and its status will not change for a long time in the future. my country's coal-fired power generation technology has made great progress after more than ten years of hard work. The coal consumption of a million-kilowatt double-reheated ultra-supercritical coal-fired power generation unit can reach 265 grams / kWh, which is in the leading position in the world. Pollutants The emission indicators of the company continue to improve, and the ultra-low emission pollutant control technology can control the main pollutants of coal-fired units to the emission level of natural gas combined cycle power generation. In 2012, my country built and put into operation the first 250,000-kilowatt integrated gasification combined cy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0612H01M8/0662H01M8/04014C10J3/46C10J3/84F01K17/04F01K23/10
CPCH01M8/04014H01M8/04022H01M8/0643H01M8/0675F01K17/04F01K23/10C10J3/46C10J3/84Y02P20/129Y02E60/50
Inventor 周贤彭烁许世森钟迪王保民
Owner HUANENG CLEAN ENERGY RES INST
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