Circulating fluidized bed coal gas purification method

A circulating fluidized bed and gas technology, which is applied in combustible gas purification, combustible gas purification/transformation, and combustible gas manufacturing. It can solve the problems of high consumption, reduce washing water volume, wide adjustable range, and increase flexibility. Effect

Active Publication Date: 2015-10-28
HUALU ENG & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The wet process needs to consume a large amount of primary water, and the concentration of particulate matter and ammonia in the scrubbing water is high; the dry process does not produce scrubbing water, but the content of particulate matter and ammonia in the gas is higher than that of the wet process

Method used

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  • Circulating fluidized bed coal gas purification method

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Embodiment Construction

[0028] An embodiment of the present invention see figure 1 , the high-temperature gas from the circulating fluidized bed passes through the two-stage cyclone separator (1, 2) for dust removal and separation, and then enters the waste heat boiler (3) for waste heat recovery, and the gas after waste heat recovery passes through the dry dust collector (4) in turn , gas cooler (5), scrubber (6), enters the desulfurization system (7), and the gas that exits the desulfurization system is sent to the user. The gas is cooled in the gas cooler (5) by a combination of direct spraying and indirect heat exchange, the gas condensed water enters the clarification tank (8), and the bottom liquid of the clarification tank with high dust content is pumped with a clarification tank bottom pump (11 ) into the filtration system (9) for filtration, the filtrate returns to the clarifier, and the clear liquid from the clarifier is sent to the stripper (10) for deamination. The gas condensed water i...

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Abstract

The invention discloses a circulating fluidized bed coal gas purification method. A gas purification technology with the dry process and the wet process combined is adopted, and gas on which cyclone dust removal and waste heat recovery are carried out is fed to a dry dust collector and then enters a gas washing tower to be washed after being cooled by a gas cooler. By combining the two processes, the gas cleanliness is greatly improved, and washing water consumption is reduced. Gas condensation water and gas washing water are respectively processed according to different kinds of impurity content. Particulate matter in the gas condensation water is removed by means of filtering, and ammonia in the gas condensation water and the gas washing water is recycled by means of a stripping tower, so that closed cycle is achieved for the gas washing water.

Description

technical field [0001] The invention relates to the field of gas purification, in particular to a circulating fluidized bed coal-made gas purification method. Background technique [0002] Industrial gas is widely used in production fields such as building materials, metallurgy, and chemical industry to provide the required heat for a large number of industrial production processes. Using coal as raw material to produce industrial gas through coal gasification or coal pyrolysis is in line with my country's energy resources pattern and is the main way of my country's industrial gas production. The method of producing gas by circulating fluidized bed pyrolysis or gasification is superior to other coal gasification or pyrolysis technologies in terms of coal type adaptability, carbon conversion rate, gas cleanliness, and economic and technical indicators. main direction. [0003] The bed temperature of the circulating fluidized bed is high (900-1100°C), the temperature gradien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/02C10K1/04C10K1/10C10K1/00C10J3/84C10J3/86
CPCY02P20/129
Inventor 姜坤张翔周敬林王煊余涛刘艳军陈一萍曹培忠
Owner HUALU ENG & TECH
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