Process of generating combustible gas by gasification of sludge

Abstract

The invention discloses a process for generating combustible gas by virtue of sludge gasification. The process comprises the following steps: 1, dewatering sludge; 2, granulating the dewatered sludge, airing and drying; 3, feeding dried sludge granules into an integrated sealed pyrolysis gasification device, and gradually drying, drily distilling, carbonizing, gasifying and combusting the sludge granules from top to bottom in the integrated sealed pyrolysis gasification device; and finally discharging gas generated in the device through a pipeline, collecting the gas, combusting organic matter residues and inorganic matters at high temperature to obtain harmless molten slag, and discharging the molten slag through a slag outlet. According to the process, 200 tons of sludge with the water content of less than 60% can be treated by a monomer gasification device each day; the reduction, the harmlessness and the energization of the sludge treatment are realized; the dioxin generation conditions are avoided; the operating cost is low, namely a large quantity of manpower cost can be reduced due to automated operation and management; 1 ton of sludge with the water content of less than 30% can be averagely gasified to generate 1600Nm<3> of combustible gas.

Description

technical field

[0001] The invention belongs to the field of environmental protection, and in particular relates to a process for gasifying sludge containing organic components such as municipal sludge, pharmaceutical factory sludge, leather sludge, paper and printing and dyeing sludge to generate combustible gas. Background technique

[0002] With the aggravation of water environment pollution in our country and the acceleration of the construction of sewage treatment plants, the treatment and disposal of sludge from sewage treatment plants has become a nationwide problem. A large amount of sludge has not been safely treated and disposed of, resulting in secondary pollution to the environment, which has greatly affected the effect of building sewage treatment plants.

[0003] Sludge treatment needs to follow the "three modernizations" principles, that is, reduction, harmlessness, and resource utilization. First of all, there are many pollutants in sludge, especially in Chi...

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