Two-stage drying and gasification integrated device and method of organic matter

Abstract

The invention discloses a two-stage drying and gasification integrated device and a two-stage drying and gasification integrated method of an organic matter. The device comprises a gasification device, a two-stage drying device, a gas purification device, a gas storage device, a gas fired boiler and an air preheating device. In a two-stage drying process of the organic matter, high-temperature combustible gas produced in an organic matter gasification process is used as a drying medium to dry the organic matter in a first-stage drying process; and saturated vapor is utilized as a drying medium to dry the organic matter in a second-stage drying process. The organic matter which is subjected to two-stage drying is used as a solid fuel for gasification reaction. Sensible heat of the high-temperature combustible gas produced by gasification and a heat value of the combustible gas are used as energy required by the two-stage drying. In the invention, the two-stage drying of the organic matter is combined with the organic matter gasification process, so that the heat value included in the organic matter can be fully utilized, zero supply of external energy can be realized, and purification problem of gasified gas is effectively solved.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for drying and resource utilization of organic matter, in particular to a method for drying high-humidity organic matter through different drying processes by using heatable gas and process heat generated by gasification of organic matter. Background technique [0002] The treatment of high-humidity organic matter with a moisture content of 80% or higher, such as urban organic matter, mainly includes anaerobic digestion, drying, and incineration. The anaerobic digestion method mainly produces methane gas through the anaerobic fermentation process, and realizes the energy utilization of high-humidity organic matter, but the organic matter produced after the anaerobic process has a high low-sludge moisture content, which is difficult to follow-up treatment. [0003] The drying method is mainly to reduce the moisture in the organic matter, and the volume and weight o...

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Problems solved by technology

[0006] Aiming at the problem that high-humidity organic matter needs to consume a lot of energy in the drying and dehydration process, the invention provides a method that utilizes the heat value contained in the organic matter itself to provide energy for the drying process of high-humidity organic matter through gasification reaction.

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