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Coal gas production method

A production method and technology for a gas generator, which are applied to the field of coal production from pulverized coal, can solve the problems of high coal consumption of coal gas and low calorific value of coal gas, and achieve the effects of good gas composition, reduced pulverized coal amount, and reduced coal consumption.

Active Publication Date: 2007-10-31
KEDA INDUSTRIAL GROUP CO LTD +1
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Problems solved by technology

The above factors have caused the unit gas and coal consumption of production to be relatively high, usually at 0.3Kg / Nm 3 ~0.4Kg / Nm 3 above; and the calorific value of gas produced by the above-mentioned traditional process is low

Method used

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Embodiment Construction

[0018] The implementation of the present invention is specifically described below with reference to Fig. 1:

[0019] The raw pulverized coal 1 with a water content of ≤8% is sent to the gasifier through the coal feeder. If the water content of the raw pulverized coal is higher than 8%, it needs to be dried first. When the furnace temperature is normal, the raw pulverized coal 1 is sent from the upper part of the gasifier; at the same time, the high-temperature gasification agent 7 with a temperature of 750-850 ° C is added to the gasifier from three positions. A reaction occurs in the gasifier to generate gas. One of the three positions is added from the lower part of the gasifier, and the addition amount is 50%-60%, and the other is added from the middle of the gasifier. The amount is 35%-45%, and the third one enters from the inlet of the circulating coal of the gasifier, and at the same time, the circulating coal is sent to the gasifier, accounting for 5% of the total high...

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Abstract

The invention discloses a preparing method of coal-gas, which comprises the following steps: which comprises the following steps: adding raw material ash coal and high temperature gasifying agent into coal-gas producer; proceeding heat change with exiting furnace coal gas and gasifying agents; generating high temperature gasifying agents; proceeding heat change with coal gas and water after heat change with gasifying agent; generating steam; setting the steam as component of gasifying agent; further-dedusting and desulfurizing the coal gas; exporting; proceeding dry type high temperature treatment before heat-changing with gasifying agent and after generating coal gas; separating dust coal; coming back to coal-gas producer; proceeding dry type low temperature treatment before heat-changing with coal gas and water and after generating high temperature gasifying agent; separating dust coal; coming back to coal-gas producer; setting the temperature of high temperature gasifying agent at 750-850 deg. c; entering through three position of the coal-gas producer. This method possesses low coal consumption and small device depletion.

Description

technical field [0001] The invention relates to a method for producing coal gas, in particular to a method for producing coal gas with pulverized coal. Background technique [0002] The process of using pulverized coal to produce gas usually includes sending pulverized coal, steam, air and oxygen into the gasifier to make them react at high temperature to generate gas, and the generated gas passes through the cyclone dust collector to return the pulverized coal Gas generator, the gas is used to generate steam through the waste heat boiler, and the washed and cooled gas is sent to the user. Because the temperature of the gas coming out of the gas generator is very high, the steam generated after passing through the waste heat boiler exceeds the needs of gas production, and the excess part will be used for other purposes; at the same time, due to the composition of steam, air and oxygen entering the gas furnace The temperature of the gasification agent is relatively low, usua...

Claims

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Application Information

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IPC IPC(8): C10J3/00C10J3/86
CPCY02P20/129
Inventor 谢志平
Owner KEDA INDUSTRIAL GROUP CO LTD
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