System and method for producing activated carbon and hydrogen through low-temperature pyrolysis of biomass steam

A technology for the production of activated carbon and low-temperature pyrolysis, which is applied to chemical instruments and methods, carbon compounds, and the manufacture of combustible gases, etc., to achieve the effects of simplifying the production process, improving heat utilization, and saving investment

Active Publication Date: 2013-04-03
SHENWU TECH GRP CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to solve some problems existing in the existing biomass pyrolysis gasification technology, develop biomass, especial...

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  • System and method for producing activated carbon and hydrogen through low-temperature pyrolysis of biomass steam

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specific Embodiment approach

[0033] refer to figure 1 , this embodiment takes bark, stem crops and sawn wood as raw materials to prepare activated carbon and hydrogen by low-temperature steam pyrolysis of biomass as an example. The processing capacity of raw materials is 0.5t / h, and the particle size is 5.0-10.0mm. The as-received basis moisture content was 15.0%. The specific embodiment comprises the processing steps of following order:

[0034] (1) Send the biomass raw material with a particle size of 5.0 to 10.0 mm into the biomass pretreatment drying unit 1; the material moves downward along the guiding porous partition of the biomass pretreatment drying chamber, and is pyrolyzed through the guiding partition. The mixture of gas and water vapor is contacted in countercurrent, heat exchanged and dried. The opening ratio of the guide partition is 20.0%, and the aperture is 1.5mm;

[0035] (2) The dried material enters the steam low-temperature pyrolysis unit 2, and is evenly distributed on the porous...

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Abstract

The invention provides a system for producing activated carbon and hydrogen through low-temperature pyrolysis of biomass steam. The system comprises a biomass pretreating and drying unit (1), a low-temperature steam pyrolyzing unit (2), a high-temperature cyclone separation unit (3), a steam catalytic reforming unit (4), hydrogen cooling and a purifying and separating unit (5), wherein the biomass pretreating and drying unit (1) is sequentially connected with the low-temperature steam pyrolyzing unit (2), the high-temperature cyclone separation unit (3), the steam catalytic reforming unit (4) and the hydrogen cooling, purifying and separating unit (5); and a gas outlet of the biomass pretreating and drying unit (1) is connected with the high-temperature cyclone separation unit (3). The system dries biomass, pyrolyzes the steam at a low temperature, performs steam activation on coke and performs catalytic reforming on pyrolysis gas and the steam, so that the system improves the heat utilizing rate in a pyrolyzing process, reduces the dust content and the coke content in pyrolysis air in a subsequent working section, simplifies the production process of the activated carbon and the hydrogen and is low in investment and energy consumption.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a system and method for producing activated carbon and hydrogen by low-temperature pyrolysis of biomass steam. Background technique [0002] Biomass low-temperature pyrolysis refers to the decomposition of biomass macromolecules (lignin, cellulose, hemicellulose, etc.) tar) thermochemical conversion technology. Pyrolysis is an essential initial stage of biomass combustion and gasification. According to the pyrolysis temperature, it can be divided into three types: low-temperature pyrolysis of 400-650°C, medium-temperature pyrolysis of 650-850°C and high-temperature pyrolysis of 850-1100°C. In the pyrolysis process, because the heat is first transferred from the heat source to the surface of the material, and then transferred from the surface to the inside of the material, the pyrolysis process of biomass is carried out layer by layer from the outside ...

Claims

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Application Information

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IPC IPC(8): C01B31/10C10J3/56C10J3/60C01B32/336
Inventor 李爱蓉吴道洪王其成
Owner SHENWU TECH GRP CO LTD
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