Continuous biomass low-temperature pyrolytic charring method and charring furnace thereof

Abstract

The invention discloses a continuous biomass low-temperature pyrolytic charring method and a charring furnace thereof, belonging to the fields of biomass charring and biomass energy source utilization. The furnace body of the charring furnace adopts a screw propelling feed mode, and the power is derived from the drive of a motor; an external heating cylinder is sheathed outside an internal heating cylinder of the furnace body, the internal cylinder and the external cylinder are spaced, and the internal flue inside the sleeve has a labyrinth path to ensure heat supply from hot flue gas to pyrolytic reaction to uniformly heat a biomass raw material; and during charring, the generated flue gas supplies heat to a reaction cylinder after combustion in a combustion chamber, and the hot flue gas enters a heat exchanger device to dry the raw material after flowing through the sleeve. Through screw propelling, the method disclosed by the invention realizes continuous low-temperature pyrolytic charring reaction, and realizes accuracy control of the retention time of the biomass inside the charring furnace; and the furnace body adopts a sleeve structure, which fully utilizes the afterheat of the charring flue gas, and the reaction cylinder adopts interior heating and outer wall heating together, which enhances the uniformity characteristic of the temperature inside the reaction cylinder and prolongs the service life of an auger shaft.

Description

technical field [0001] The invention relates to a continuous biomass low-temperature pyrolysis carbonization method and a carbonization furnace thereof, belonging to the field of biomass carbonization and its energy utilization. Background technique [0002] The world is rich in biological resources in various forms, mainly including firewood, agricultural and forestry crops, aquatic plants, poultry and livestock manure, etc. The total amount of biomass energy grown on the earth every year is about 140 billion tons to 180 billion tons (dry weight), which is equivalent to about 10 times the current total energy consumption in the world. [0003] Biomass pyrolysis and carbonization technology is a promising biomass energy utilization technology. It uses pyrolysis technology to decompose biomass into three products: biomass charcoal, pyrolysis gas and tar. According to different operating temperatures, this technology can be divided into low-temperature carbonization, medium-t...

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Problems solved by technology

Chinese patent CN101220283A discloses a continuous biomass carbonization device, but because this method does not reasonably separate the biomass anoxic combustion and carbonization process, it brings certain difficulties to production control

The defects of the above-mentioned biomass carbonization devices also limit the development of the industrialization of biomass energy to a certain extent.

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