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Oxygenation intermittent coal gas preparation

An intermittent gasification technology, applied in fixed bed gasification, combustible gas production, climate sustainability, etc., can solve problems such as lack of reliable alternative gas production devices, high exhaust pollution, and impact on the development of coal chemical industry , to achieve the effect of reducing time, increasing gas making time and improving composition

Inactive Publication Date: 2012-07-25
武汉奥泰自动化工程有限责任公司
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Problems solved by technology

[0004] The above-mentioned backward gas preparation process, high energy consumption and high exhaust pollution have seriously affected the development of my country's coal chemical industry, especially the fertilizer industry.
The National Development and Reform Commission has made it clear that it will eliminate this ancient gas production method, which accounts for more than 70% of the national fertilizer industry's gas production process, but there is a lack of reliable alternative gas production devices

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  • Oxygenation intermittent coal gas preparation

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Embodiment Construction

[0068] The invention relates to an oxygen-increasing intermittent coal gas preparation method, the steps of which are actually two steps of heating up by blowing air and cooling by gas production to form a cycle of producing coal gas (water gas or semi-water gas).

[0069] 1. "Blowing" stage, that is, blowing to heat up, by controlling the amount of oxygen in different concentrations in the air, reducing the time of the blowing stage, wherein the oxygen content in the blowing air is 21% or 22% or 23% or 24% or 25% or 26% or 27% or 28%... etc; blowing percentage corresponds to 22% or 20.7% or 19.6% or 18.5% or 17.5% or 16.6% or 15.8% or 15.0%... etc; one cycle blowing time Corresponding to 33 seconds or 31.1 seconds or 29.37 seconds or 27.78 seconds or 26.32 seconds or 24.97 seconds or 23.72 seconds or 22.56 seconds...etc.

[0070] The purpose of the blowing stage is to use the oxygen in the natural air to blow into the gas-making furnace to oxidize and react with the hot carbo...

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Abstract

The invention discloses an intermittent coal gas (water gas and semiwater gas) preparation process for oxygenating in a fixed bed gas making furnace, which provides oxygen by utilizing the industrialized air separation oxygen preparing technology in China and automatically adjust the oxygenation concentration in air according to gas components generated in stages of blowing, ascending, descendingand blowing-off of the gas preparation circulation so as to lead the furnace temperature to be stabilized at higher average temperature for less circulation fluctuation, thereby completely playing the heat efficiency during the gas preparation process, increasing the gas preparation temperature of the gas making furnace, improving the yield of the gas making furnace, lowering the consumption of raw material coal, reducing the discharge amount of the blowing and achieving the purposes of saving energy and reducing emission.

Description

technical field [0001] The invention relates to a coal gas preparation method, in particular to a fixed-bed intermittent gas preparation method for saving coal and reducing emissions. The method utilizes increasing the oxygen content in the furnace air to promote coal combustion and improve the decomposition time of steam and hot carbon layers. of heat. Background technique [0002] In the process of producing water gas and semi-water gas, how to use aerobic is a key technology. At present, most of the coal combustion process in our country adopts 21% oxygen in the natural air to support combustion. In the fixed bed gasifier, the coal in the fixed bed is basically oxidized intermittently, and the furnace temperature is increased to supply the heat required for steam decomposition to produce CO and H 2 , Generate water gas or semi-water gas as gas fuel and raw material gas for industrial production. In particular, the raw material gas (semi-water gas) for the production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/02C10J3/16
CPCY02E20/18Y02P20/10
Inventor 张凤葵姚飞龙
Owner 武汉奥泰自动化工程有限责任公司
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