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Coal-based fuel near zero emission power generation system and method

A near-zero-emission, coal-based fuel technology, applied in engine components, gas turbine devices, machines/engines, etc., can solve the problems of low power generation efficiency, high cost, difficult processing, etc., to improve efficiency, reduce investment costs, and improve heating Efficiency and effect of steam temperature

Active Publication Date: 2012-08-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is aimed at conventional coal-fired power station CO 2 To solve the problems of difficult, high cost and low power generation efficiency, a coal-based fuel near-zero emission power generation system and method are proposed

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  • Coal-based fuel near zero emission power generation system and method

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specific Embodiment approach 1

[0020] Specific implementation mode one: as figure 1 As shown, the coal-based fuel near-zero emission power generation system described in this embodiment includes a demineralization pretreatment system 1, an ultra-clean coal pure oxygen burner 2, an air separation system 3, a high-pressure combustion chamber 4, Advanced turbine 5, circulating water preheater 6, condenser 7, water purification treatment system 8 and CO 2 Recycling device 9; demineralization pretreatment system 1 is used to remove minerals in raw coal, the ultra-clean coal outlet of demineralization pretreatment system 1 is connected with ultra-clean coal pure oxygen burner 2, and the oxygen of air separation system 3 The outlet is connected to the ultra-clean coal pure oxygen burner 2, and the ultra-clean coal pure oxygen burner 2 cooperates with the high-pressure combustion chamber 4 to ensure high-pressure pure oxygen combustion. The mixed gas outlet of the high-pressure combustion chamber 4 is connected to ...

specific Embodiment approach 2

[0021] Specific implementation mode two: as figure 1 As shown, the demineralization pretreatment system 1 described in this embodiment removes the minerals in the raw coal to obtain ultra-clean coal with an ash mass fraction lower than 0.1%, which ensures clean combustion and can meet the requirements of advanced turbine mixing. air quality requirements. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0022] Specific implementation mode three: as figure 1As shown, the ultra-clean coal pure oxygen burner 2 in this embodiment has three inlets of ultra-clean coal, oxygen and circulating water, and an ignition device is also provided on the ultra-clean coal pure oxygen burner 2, and the ultra-clean coal pure oxygen The burner 2 cooperates with the high-pressure combustion chamber 4 to realize the feeding and good mixing of ultra-clean coal, oxygen and circulating water, and ensure the ignition and stable combustion of the ultra-clean coal. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention provides a coal-based fuel near zero emission power generation system and a method, and the invention relates to the technical field of coal-based fuel CO2 zero emission power generation. The method comprises the following steps: raw coal is subjected to demineralization pretreatment to be produced into ultra-clean coal; the ultra-clean coal is combusted in a high-pressure combustion chamber under pure oxygen condition; water sprayed into the combustion chamber step by step is directly heated into high temperature and high pressure mixed gas and an advanced turbine is pushed by the mixed gas to do work; exhaust gas is condensed by using a condenser to be produced into high concentration CO2; and zero emission of atmospheric pollutant is finally realized. The invention also provides a system for realizing the above processes. The system mainly consists of a demineralization pretreatment system, an ultra-clean coal pure oxygen combustor, an air separation system, the high-pressure combustion chamber, the advanced turbine, the condenser, a water purification treatment system and a CO2 recovery processing device. According to the invention, problems of conventional power generation methods, such as high pollutant emission and high CO2 capture cost, are solved. Furthermore, efficient and clean usage and zero pollutant emission of combusted coal are realized.

Description

technical field [0001] The present invention relates to coal-based fuel CO 2 The technical field of zero-emission power generation, in particular to a coal-based fuel oxygen combustion near-zero-emission power generation system and method. Background technique [0002] Climate warming has become the biggest environmental problem facing mankind in the 21st century. To control global climate change, the key is to control CO 2 emissions. Coal-fired power plants are CO 2 It is of great significance to develop and research new solid fuel utilization technology and realize high-efficiency and zero-pollution emission power generation technology. Conventional Pulverized Coal Boiler Power Plant Reduces CO 2 The emission problem is: CO in flue gas 2 The volume concentration is low, only about 12%-15%, the separation is difficult, the cost of power generation increases significantly, and the overall efficiency of the power plant drops by nearly 12 percentage points. Ensure high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C3/04F02C3/30F01D25/32
Inventor 孙绍增孟顺许焕焕邱朋华孙锐赵义军郭洋洲吴少华秦裕琨
Owner HARBIN INST OF TECH
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