Biomass gas and biomass charcoal preparation system

Abstract

The present invention relates to a biomass gas and biomass charcoal preparation system, including three successive working units: a feeding unit, a pyrolysis reaction unit, and a discharging unit, and further having a pyrolysis reaction control system. The pyrolysis reaction unit has a pyrolysis reaction body. The pyrolysis reaction body is provided therein with a helical propulsion device and an air supply device. The pyrolysis reaction body is a rectangular cavity having a metal shell. The cavity of the pyrolysis reaction body is divided into two parts: an upper part and a lower part that are separable. In the present invention, the pyrolysis reaction body is provided therein with a thermal insulating layer, which effectively separates the metal shell from a high-temperature reaction medium, so requirements for the heat resistance of the material of the cavity of the pyrolysis reaction body are lowered, a common carbon steel material can be used and the cost is reduced, and the metal shell is effectively relieved of thermal deformation, and heat loss is reduced; the pyrolysis reaction body is divided into an upper part and a lower part, so it is easier to disassemble wearing parts on the bottom of the reaction body to facilitate maintenance and replacement.

What is claimed is: 
     
         1 . A biomass gas and biomass charcoal preparation system, including three successive working units: a feeding unit ( 1 ), a pyrolysis reaction unit ( 2 ), and a discharging unit ( 3 ), and further having a pyrolysis reaction control system ( 4 ), wherein the feeding unit ( 1 ) has a helical feeding device ( 11 ) with helical blades provided at varying densities; the pyrolysis reaction unit ( 2 ) has a pyrolysis reaction body ( 21 ), and the pyrolysis reaction body ( 21 ) is provided therein with a helical propulsion device ( 22 ) and an air supply device ( 23 ); and the discharging unit ( 3 ) has a helical discharging device ( 32 ) and an air feeding system ( 33 );
 the pyrolysis reaction body ( 21 ) is a rectangular cavity having a metal shell; and   the air supply device ( 23 ) has a porous box disposed on the bottom of the pyrolysis reaction body ( 21 ),   characterized in that the cavity of the pyrolysis reaction body ( 21 ) is divided into parts: an upper part and a lower part that are separable.   
     
     
         2 . The biomass gas and biomass charcoal preparation system according to  claim 1 , characterized in that an interface ( 27 ) between the upper part and the lower part of the cavity of the pyrolysis reaction body ( 21 ) is opened on the lower part of the cavity, so that the bottom of the cavity together with the air supply device ( 23 ) can be detached from the pyrolysis reaction body ( 21 ) during separation. 
     
     
         3 . The biomass gas and biomass charcoal preparation system according to  claim 1 , characterized in that an interface ( 27 ) between the upper part and the lower part of the cavity of the pyrolysis reaction body ( 21 ) is opened at the end of the lower part of the cavity. 
     
     
         4 . The biomass gas and biomass charcoal preparation system according to  claim 2 , characterized in that an inner surface of the cavity other than a bottom surface of the pyrolysis reaction body ( 21 ) is provided with a thermal insulating layer ( 28 ). 
     
     
         5 . The biomass gas and biomass charcoal preparation system according to  claim 3 , characterized in that the thermal insulating layer ( 28 ) is made of a light-weight, high-temperature resistant and corrosion resistant thermal insulating material.