Method and device for dry distillation and charring of internal combustion self-heating moving bed

Abstract

Disclosed is a wood (bamboo) moving bed consecution dry distillation charring process and a corresponding internal combustion self-heating moving bed consecution dry distillation retort, wherein the raw material, the gas and steam produced by dry distillation are in counter-current flow in the bed layers, the lower portion of the furnace is provided by at least four air intakes for leading-in air in a controlled manner, the combustible constituent produced in the combustion charring process can calcinate the wood (bamboo) charcoal at the temperature of 601-800 deg. C, the blanking tube is made of material with good thermal conductivity, the incinerated wood (bamboo) charcoal can be cooled to room temperature and discharged through the blanking tube.

Description

technical field [0001] The invention belongs to the technical field of wood pyrolysis, and relates to a method for preparing wood (bamboo) vinegar, wood (bamboo) charcoal and wood (bamboo) gas by thermally decomposing wood (bamboo) materials and other biomass materials and corresponding equipment . Background technique [0002] Among the current dry distillation and carbonization techniques and equipment, it is generally considered that the best is "vertical internal heat moving bed continuous carbonization carbonization", and its core equipment is called "internal heat vertical carbonization kettle" (see "Forest Chemical Industry Encyclopedia" No. 951-954, Chapter 24 of Part Two), in a cylindrical shape, made of 14mn thick steel plate, with an inner diameter of 2.6-2.9m, a total height of 24m, and a working height of 15m. The top of the kettle is equipped with a feeder, a water seal cover, and a steam gas outlet; two conical funnels are installed in the middle of the kettl...

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Problems solved by technology

But it also has obvious disadvantages. First, the process is complicated. There are raw materials-charcoal flow, heat carrier-steam, gas flow, "cold gas"-"hot gas" flow. There are too many logistics, so it is naturally more difficult to control and balance; two. The calcination temperature of charcoal is low, and it is impossible to produce charcoal with high carbonization degree and high conductivity; the third is that the requirements for feeding and discharging equipment are high and the operation is troublesome. If the gas leaks out, it is necessary to use the carbon unloader with three gates to operate step by step, which is both troublesome and prone to failure; fourth, the system and equipment are complex and expensive, and it is difficult to adapt to moderate-scale production in areas where resources are not concentrated; especially in recent years In the future, the protection of resources and the environment has been paid more and more attention. Large-scale cutting of firewood and burning charcoal has been banned. Waste materials and waste materials from forest product processing have become the main raw materials for burning charcoal. new dry distillation carbonization furnace

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