A method and device for continuous pyrolysis and carbonization of biomass

Abstract

The invention relates to a biomass continuous pyrolysis carbonization treatment method and device. The device comprises a heat supply part, a pretreatment part, a carbonization treatment part, a gas treatment part, a gas utilization part and a pressure control part, wherein a port of a combustor is connected into a combustion chamber to obtain high temperature flue gas; biomass is put in a pretreatment chamber and the high temperature flue gas in the heat supply part is introduced to heat the biomass; the pretreated biomass is sent to a carbonization treatment chamber and the high temperature flue gas in the heat supply part is introduced to heat the biomass; gaseous products generated in pretreatment and carbonization treatment are collected and condensed to obtain condensed fluid and non-condensable gases; the non-condensable gases are introduced in the combustion chamber to be combusted; the pressures in outer hot jackets of the pretreatment part and the carbonization treatment part become negative by adjusting air duct adjusting devices. The invention also provides a device for implementing the method. The method has the advantages of simplified process, simple equipment, stability and reliability in operation, high heat energy utilization rate, low production cost, and the like.

Description

Technical field: [0001] The invention belongs to the technical field of biomass carbonization and its energy utilization, and more specifically relates to a biomass continuous pyrolysis carbonization treatment method and device. Background technique: [0002] In recent years, with the depletion of petroleum and other fossil fuels and the global concern about climate change caused by greenhouse gas emissions, the development and utilization of renewable energy, the improvement of energy efficiency, and the realization of energy conservation and emission reduction have become the main theme of world energy development . At present, biomass energy accounts for 14% of the world's total energy consumption, ranking fourth after petroleum, coal and natural gas. As a new energy source, biomass energy has large reserves, renewable, storable and replaceable It has the characteristics of low sulfur and low nitrogen net emissions, and has unique advantages in energy utilization and env...

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Problems solved by technology

[0003] Chinese Invention Patent Publication CN102226092A discloses a continuous biomass low-temperature pyrolysis carbonization method and its carbonization furnace. The carbonization furnace includes a drying device, a pyrolysis carbonization device, a cooling device and a combustion chamber. Reasonably control the residence time of biomass in the carbonization furnace according to the requirements. Among them, the temperature of different sections in the carbonization furnace is controlled according to the amount of biomass raw material feed and the high-temperature flue gas flow generated by the combustion of biomass pyrolysis gas. In the actual use process According to the applicant’s reflection, this set of equipment can complete the drying and carbonization of biomass raw materials well, but it has certain problems: although the labyrinth heat exchange device is installed in the outer sleeve of the pyrolysis carbonization device to improve the Thermal efficiency, but the overall process and corresponding structure of the equipment are complex and costly. At the same time, the heat supply of different sections in the carbonization furnace is not easy to adjust according to the actual needs of drying and carbonization, resulting in low heat utilization and large equipment footprint and high production cost

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