Device and method for accelerating gas generating speed by biomass pyrolysis and obtaining nanoscale carbon dioxide material

Abstract

The invention provides a device and method for accelerating gas generating speed by biomass pyrolysis and obtaining a nanoscale carbon dioxide material. The device comprises a spiral feeding device, a pre-treatment stirrer, a pyrolysing device, a combusting device, a steam generator and a calcining device. A biomass raw material is fed to the pre-treatment stirrer through the spiral feeding device, stirred biomass raw material and superheated water vapor generated by the steam generator are mixed and enter the pyrolysing device, a combustible gas separated out by the pyrolysing device combusts in the combusting device, hot smoke generated by the combusting device heats the superheated water vapor generated by the steam generator, and ash discharged from an ash opening at the lower part of the pyrolysing device combusts in the combusting device. The device provided by the invention uses superheated water vapor to heat and dry the biomass raw material, and the drying speed is high compared with that of a method in which biomass raw material is dried by synthermal hot air, so that a pyrolytic gas separating speed of the system is greatly improved compared with the pyrolytic gas separating speed and the gas generating heat value of the conventional system.

Description

technical field [0001] The invention relates to a device and method for accelerating biomass pyrolysis gas production speed and obtaining nanometer silicon dioxide material. Background technique [0002] Silica Although abundant in many natural resources, high-purity amorphous silica is rarely found in natural sources. At present, there have been reports on the production of amorphous silica by using inorganic materials, but the production cost of the process is high, the energy consumption is large, and the environmental pollution is serious. [0003] In addition, there are also reports on methods for extracting silica from biomass: for example, patent ZL02807291.X describes the process of producing high-purity amorphous silica from rice husks, but they do not consider organic matter and energy utilization. , can not make effective use of biomass. Although the patent application 102653406 introduces the process of preparing amorphous silica by anaerobic pyrolysis of rice ...

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Problems solved by technology

[0002] Silica Although abundant in many natural resources, high-purity amorphous silica is rarely found in natural resources

At present, there have been reports on the use of inorganic materials to produce amorphous silica, but the production cost of the process is high, energy consumption is large, and environmental pollution is serious

[0003] In addition, there are also reports on methods for extracting silica from biomass: for example, patent ZL02807291.X describes the process of producing high-purity amorphous silica from rice husks, but they do not consider organic matter and energy utilization. , can not make effective use of biomass

Although the patent application 102653406 introduces the process of preparing amorphous silica by anaerobic pyrolysis of rice husk, the raw material is pickled and dried to destroy the macromolecular chain structure of lignocellulose to promote the pyrolysis reaction. , but did not consider the influence of the water content of biomass raw materials in the whole process system on the speed and efficiency of pyrolysis gas production, and the pyrolysis temperature is too low to easily produce macromolecular condensable gas in the pyrolysis gas, resulting in pyrolysis gas transportation pipelines, Problems such as tar condensation on the wall of combustion equipment

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