Gasification system for carbon-containing fuel

A gasification system and fuel gasification technology, applied in the manufacture of combustible gas, chemical industry, joint combustion mitigation, etc., can solve the problems of inability to efficiently use high-temperature water to discharge heat, and achieve the effect of carbon loss and waste reduction
CN103710046AActive Publication Date: 2014-04-09MITSUBISHI POWER LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI POWER LTD
Publication Date
2014-04-09

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Abstract

The present invention provides a gasification system for carbon-containing fuel that achieves both the utilization of high-temperature waste water and waste heat generated by a gasifier and the reduction in the equipment and construction costs of the gasifier. In a gasifier (3) for gasifying carbon-containing fuel, high-temperature water is pulled out from a slag-cooling water pool (12) at the bottom of the gasifier, and fed to the downstream side of the gasifier or the upstream side of a dust removing part (8) through a water supply system (c) so as to be mixed with a syngas, thereby cooling the syngas. Thus, a heat recovery part (7) of the syngas can be miniaturized or eliminated. The high-temperature water pulled out from the slag-cooling water pool is easily evaporated while being mixed with the syngas, such that the syngas can be cooled with high efficiency. Solids in the high-temperature water pulled out from the slag-cooling water pool are recovered by the duct removing part with the syngas, and fed into the gasifier again. Thus, the utilization of the waste heat of the high-temperature water is realized, and the carbon loss and waste material are reduced.
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Description

technical field

[0001] The present invention relates to a gasification system for carbon-based fuels such as coal, in particular to a gasification system for carbon-based fuels that takes into account both drainage and waste heat utilization and waste reduction. Background technique

[0002] The product gas produced by gasifying carbon-based fuel such as coal reaches 1000°C or higher at the outlet of the gasifier. In order to purify the generated gas by removing dust, impurities such as chlorine components and sulfur components, it is necessary to cool the generated gas to less than 400°C. In gasification systems for power generation, energy efficiency is improved by recovering heat when the produced gas is cooled.

[0003] The generated gas from the gasification furnace is accompanied by a large amount of solid matter consisting of unburned carbon and ash components. Therefore, in the process of cooling while recovering heat from the generated gas, it is necessary to prev...

Claims

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