Method for using sludge to produce coal gas

A sludge and gas technology, which is applied in the direction of pyrolysis treatment of sludge, granular/powdered fuel gasification, etc., can solve the problems of large waste of water resources, low calorific value of sludge and coal slurry, and high cost of sludge disposal

Inactive Publication Date: 2011-09-21
光大清洁技术股份有限公司
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Problems solved by technology

[0008] The main purpose of the present invention is to: provide a kind of method that uses sludge to make gas, in order to overcome or at least alleviate existing sludge disposal method, gasification of coal-water slurry and the defects and deficiencies of sludge-coal-water slurry
The technical problems to be solved by the present invention are the high cost of existing sludge disposal, the problems of secondary environmental pollution and incomplete sludge disposal in the process of sludge disposal; excessive loss of coal heat energy in the process of gasifying coal-water slurry, The application problems of large waste of water resources and low calorific value of sludge and coal slurry

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Embodiment Construction

[0027] Below, the present invention will be further described in combination with specific embodiments.

[0028] The primary innovation of the present invention is to use sludge as the main raw material or one of the main raw materials to prepare gas. And usually the following three specific ways can be used to prepare gas from sludge: 1) prepare gas from sludge coal slurry; 2) directly send sludge into the gasifier to burn with other fuels and react to generate gas; and 3) Separately dry the sludge and send it directly into the gasifier for combustion and reaction to generate coal gas.

[0029] The method for producing coal gas according to the first embodiment of the present invention includes the following steps: 1) making sludge coal slurry with sludge and coal; and 2) sending the sludge coal slurry into the gasifier to make the sludge Coal slurry and gasification agent undergo combustion reaction and gasification reaction to generate coal gas.

[0030]Apparently, the ab...

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Abstract

The invention discloses a method for using sludge to produce coal gas. The method comprises the following steps: (1) using sludge and coal to prepare sludge and coal slurry; (2) sending the sludge and coal slurry into a vapourizing furnace, allowing the sludge and coal slurry and a gasifying agent to react to generate coal gas. For example, the sludge and coal slurry and the gasifying agent are subject to a combustion reaction and a gasification reaction at a temperature higher than the melting point of the sludge and coal slurry to generate coal gas. The process flow of the method is: preparation of sludge water and coal sludge-combustion-cooling-coal gas. By adopting sludge as the main raw material of coal gas production, on one hand, the sludge is effectively processed (the sludge goes through the high temperature processing of combustion and gasification and bacteria are killed) ; on the other hand, the resource utilization of sludge is realized.

Description

technical field [0001] The invention relates to environmental protection technology, in particular to sludge disposal technology, in particular to a method for producing gas from sludge. Background technique [0002] Sludge is solid waste generated during sewage treatment, mainly including urban dewatered sludge and industrial dewatered sludge (such as papermaking sludge, printing and dyeing sludge, etc.). With the development of science and technology and people's increasing environmental requirements, The proportion and degree of sewage treatment in the world are gradually increasing. At present, the amount of sludge (dry weight) discharged by domestic sewage treatment plants in my country is about 1.3 million tons per year, and the annual growth rate is greater than 10%. Sludge is an effective Potentially dangerous substances, the reasons are: 1) wet sludge contains various bacteria, viruses and parasites, and germs multiply in large numbers. 2) The sludge also contains he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46C02F11/10
Inventor 吴淼孙浩巩长勇
Owner 光大清洁技术股份有限公司
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