Closed pyrolysis carbonization poly-generation process

Abstract

The invention discloses a closed pyrolysis carbonization poly-generation process, and relates to a technical field of renewable energy. The process is used in pyrolysis carbonization processing lines of various biomasses in actual productions. The process is mainly composed of 4 processes of material crushing, material drying, pyrolysis carbonization and carbon-gas separation. According to the invention, a biomass material fed continuously with a closed state is crushed and dried, and is delivered to a pyrolysis carbonization process; in a working initial stage, an external heat source supplies initiation energy for material carbonization; when high-temperature fuel gas produced by crude fuel gas high-temperature pyrolysis in the carbon-gas separation process supplies energy for the operation of pyrolysis carbonization, the external heat source is disconnected. Therefore, an "external excitation initiation and closed cyclic operation" heat source utilization mode is realized. With the process, biochar and fuel gas poly-generation can be realized, and high-efficiency residual heat recovery can be realized with a multi-path closed cycle technology, such that the purposes of energy saving, emission reduction and energy consumption reduction are achieved. The process is suitable for the pyrolysis carbonization processes of various biomasses.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and in particular relates to a closed pyrolysis carbonization polygeneration process, which is suitable for the pyrolysis carbonization assembly line processing of various biomass in actual production. In work, this process can not only realize the cogeneration of biochar and gas, but also realize efficient waste heat recovery through multi-channel closed cycle technology. Background technique [0002] Biochar is a solid product produced by thermal cracking of biomass organic materials in an anoxic or anaerobic environment. It is rich in resources and has a wide range of uses. It can be used not only as a high-quality energy source, but also as a reducing agent, as well as a soil improver, fertilizer slow-release carrier and carbon dioxide sequestration agent. my country's energy structure is mainly based on coal, because of the environmental pollution caused by its use, the ecological ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high energy consumption, large heat loss and imperfect production process in the existing biomass pyrolysis carbonization technology described in the technical background, and disclose a closed pyrolysis carbonization polygeneration The process is characterized in that the process is mainly composed of four processes: material crushing, material drying, pyrolysis carbonization, and carbon gas separation. The continuously sealed and fed biomass materials enter the pyrolysis carbonization process after crushing and drying. In the initial stage, the external heat source provides energy for the carbonization of the material. When the high-temperature gas generated by the pyrolysis of the raw gas in the carbon-gas separation process supplies energy for the pyrolysis carbonization, the external heat source is disconnected to realize the heat source of "external excitation, start-up, and closed cycle operation". use mode

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