Method and device for producing coal gas by pulverized coal pyrolysis

A technology of production device and production method, which is applied in gas dust removal, combustible gas production, combustible gas purification, etc., can solve the problems of low cost, high nitrogen content, low gas calorific value, etc., and achieves low coal quality conversion cost and purification. Simple system and high calorific value of gas

CN103980951AInactive Publication Date: 2014-08-13CHANGAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and device for producing a coal gas by pulverized coal pyrolysis. The coal gas production method disclosed by the invention comprises the following step: with an unpurified raw gas which is obtained from raw coal by dry distillation pyrolysis as a raw material, producing the high-quality coal gas inside a regenerative chamber in a pyrolysis manner. The device disclosed by the invention comprises a raw coal drying oven, a dry distillation furnace, a regenerative chamber for pyrolyzing the raw gas, and a hot blast heater for supplying heat. The raw gas is pyrolyzed to produce the coal gas, water vapor in the raw gas reacts with coke powder to produce a water gas, and meanwhile tar is cracked into the coal gas, so as to serve multiple purposes. The method and device disclosed by the invention have the advantages of low energy consumption, low investment, high calorific value of the gas, low semicoke ash and low coal quality transformation cost.
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Description

technical field

[0001] The invention relates to coal dry distillation pyrolysis technology, in particular to a method and device for preparing coal gas by pyrolysis of coal. Background technique

[0002] Coal gasification to prepare coal gas is an important process for coal conversion. The high-temperature and high-pressure coal gasification process requires complex equipment and large investment scale; the atmospheric pressure coal gasification process causes heavy pollution, low coal conversion rate, and low calorific value of coal gas.

[0003] Obtaining coal gas through coal pyrolysis requires small investment and low cost, but most of the traditional coal pyrolysis is an internal heating process, with high nitrogen content in the gas and low calorific value of the gas.

[0004] The gas produced by traditional external heating coal pyrolysis has a high calorific value, but the gas yield is low, the thermal efficiency is low, and the tar capture process is complicated. ...

Examples

Embodiment

[0050] refer to figure 1 and figure 2 , the device of this embodiment comprises a drying furnace 1, a dry distillation furnace 2, a regenerator 3 and a hot blast furnace 6;

[0051] Drying furnace 1 is a flue gas external heating drying furnace, dry distillation furnace 2 is a rotary furnace combining external heating and internal heating, and the regenerator 3 includes two regenerator monomers. The two monomers have the same structure and are both Including the container body and the heat storage material filled in the container body, the two regenerator cells adopt the method of regular reversing to realize the heat exchange of hot flue gas and coal gas;

[0052] Wherein the drying furnace 1 is located above the carbonization furnace 2, and the outlet of the drying furnace 1 is connected with the inlet of the carbonization furnace 2, the crude gas outlet of the carbonization furnace 2 is connected with the inlet of the cyclone dust collector 4, and the outlet of the cyclon...