Horizontal pushing type vertical biomass charcoal gas-oil co-production device and use method thereof

Abstract

The invention relates to a horizontal pushing type vertical biomass charcoal gas-oil co-production device. Biomass moves down in a reciprocating manner by layers in a vertical pyrolyzing furnace by a horizontal pushing device; and a gas carrying heat medium directly passes through a material layer, and the biomass is heated in form of convection. The structure specifically comprises an external furnace body and a drying destructive distillation reaction space surrounded by a brasque in the furnace body, wherein the drying destructive distillation reaction space is substantially modularized and separated to six layers of horizontal box type spaces equally; the six layers of space are divided into three areas: a water removing area, a low-temperature pyrolysis area and a high-temperature pyrolysis area; and a horizontal fire grate is arranged in each layer of horizontal box space of the device in a pull back manner in many times. According to the invention, physical partition of the pyrolyzing process is realized, the adjustability of the destructive distillation process is greatly improved, pyrolysis products and the material layer are fast separated, and the liquid product yield in the pyrolysis products is high; the power consumption of a draught fan is greatly reduced, and the operating cost is lowered; and the device provided by the invention is vertically arranged, small in occupied area, and easy for parallel operation of multiple sets.

Description

Technical field [0001] The invention relates to a device and method for biomass carbon-gas-oil co-production through a thermochemical method, in particular to a horizontally pushing vertical biomass carbon-gas-oil co-production device and its use method. Background technique [0002] The known biomass charcoal-gas-oil co-production technology includes two methods, one is to use the reactor indirect heating pyrolysis technology to carry out charcoal-oil thermochemical processing of biomass. The second is to use circulating fluidized bed technology to process biomass for carbon, gas and oil thermochemical processing. [0003] The indirect heating technology is suitable for small-scale production mode. The process method is: after the biomass is shaped, put it into the reactor to isolate the air and heat it up for pyrolysis. The heat source heats the wall of the reactor outside the reactor, and the heat is transmitted to the inside of the reactor through the wall. Biomass comp...

AI Technical Summary

Problems solved by technology

The disadvantage of indirect heating is mainly the low heat transfer efficiency. In this process, the temperature rise of the biomass in the middle of the kettle is mainly realized by heat conduction. Since the thermal conductivity of the biomass itself is low, and the surrounding biomass is filled with a gas with high thermal resistance, So heat conduction is slow

Inefficient heat transfer has four adverse effects on production:

[0004] 1. In the indirect heating process, the temperature of biomass rises slowly, which leads to a decrease in the pyrolysis rate of biomass, and finally reduces the yield of liquid products in biomass pyrolysis products

[0005] 2. Under the condition that the treatment equipment remains unchanged, the reduction of the biomass pyrolysis rate will eventually lead to a decrease in the biomass treatment capacity and an increase in the treatment cost

[0006] 3. The low heat transfer efficiency not only makes the thermal efficiency of the whole heating process low, but also increases the cost of biomass pyrolysis

[0007] 4. In the indirect heating process, the biomass needs to be shaped first, and the shaping of the biomass increases the comprehensive cost of the carbon-gas-oil co-production process

However, due to the low energy density of biomass and the constraints of transportation radius, the application of large-scale circulating fluidized bed biomass carbon-gas-oil cogeneration system is not yet mature.

[0010] 2. The pyrolysis gas contains a large amount of dust, and the cost of dust removal is very high, and the liquid product contains a large amount of inorganic dust that is difficult to separate, making the deep processing of bio-oil very difficult

[0011] 3. The power consumption of the fluidized bed is high, which affects the economy of the system

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