Coal pyrolysis and gasification polygeneration process based on circulating fluidized bed and coal pyrolysis and gasification polygeneration system based on circulating fluidized bed

A circulating fluidized bed and polygeneration technology, applied in the field of coal pyrolysis, can solve problems such as pollution and low combustion efficiency, and achieve resource and environmental problems, low energy consumption and oxygen consumption, reduced energy consumption and purification cost effect

Inactive Publication Date: 2015-01-07
SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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Problems solved by technology

[0002] my country is rich in coal resources. In 2012, my country's coal output reached 3.6 billion tons, of which about 80% was used for direct combustion. Direct combustion of coal has pro

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  • Coal pyrolysis and gasification polygeneration process based on circulating fluidized bed and coal pyrolysis and gasification polygeneration system based on circulating fluidized bed

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Embodiment Construction

[0028] Such as figure 1 As shown, in the coal pyrolysis gasification polygeneration system based on circulating fluidized bed of the present invention, low-quality coal or low-volatile coal directly enters circulating fluidized bed boiler 1 for combustion from coal hopper 3 through coal delivery pipe 11, and utilizes circulation The high-temperature circulating ash of the fluidized bed boiler is used as a heat carrier to pyrolyze the high-volatile coal with a volatile content of 15%-45% from the pyrolysis coal hopper 2 in the moving bed pyrolysis reactor 4 to obtain pyrolysis gas, of which , the pyrolysis temperature is controlled by adjusting the ratio of circulating ash and feed coal, and the range of pyrolysis temperature is 400-700°C. The solid-phase product discharged from the pyrolysis reactor enters the sieve device 5 for sieving treatment. The opening size of the sieve plate can be adjusted within the range of 1-10mm. The circulating ash and powdery coke under the siev...

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Abstract

The invention provides a coal pyrolysis and gasification polygeneration process based on a circulating fluidized bed and a coal pyrolysis and gasification polygeneration system based on a circulating fluidized bed. The process comprises the following steps: sequentially carrying out pyrolysis, gasification and combustion processes on high volatile coal from the reactivity of coal; feeding low-value powdered semicoke or powdered active semicoke which is generated by granular crushing in the pyrolysis or gasification process; finally preparing active semicoke by using high-value granular semicoke and using the active semicoke in the field of an adsorbent and a catalyst and the like; and directly feeding low volatile coal, coal gangues and fault coal into the circulating fluidized bed to combust. High-quality and inferior coal resources are reasonably utilized for graded conversion and utilization, so that the resource and environmental problems are better solved. The process is a coal graded utilization process which combines pyrolysis, gasification and combustion, thereby achieving joint production of heat, electricity, tar, coal gas and active carbon.

Description

technical field [0001] The invention relates to the field of coal pyrolysis, in particular to a coal pyrolysis gasification polygeneration process and system based on a circulating fluidized bed. Background technique [0002] my country is rich in coal resources. In 2012, my country's coal output reached 3.6 billion tons, of which about 80% was used for direct combustion. Direct combustion of coal has problems such as low combustion efficiency and serious pollution. Therefore, new technologies for efficient comprehensive utilization of coal and low pollution emissions are developed imminent. Contents of the invention [0003] The invention provides a coal pyrolysis gasification polygeneration process based on a circulating fluidized bed, which is a coal classification utilization process combining pyrolysis, gasification and combustion, and can realize heat, electricity, tar, gas and active coke joint production. [0004] It is another object of the invention to provide a...

Claims

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Application Information

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IPC IPC(8): C10J3/60C10J3/62C10J3/66C10J3/48C10J3/84
CPCC10J3/00C10B49/18C10J3/62C10J3/66C10J3/84C10J2300/0943
Inventor 梁鹏王东飞裴建勋王伟林张玮武加峰
Owner SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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