Feeding device for biomass gasifier

Abstract

The invention discloses a feeding device for a biomass gasifier. The feeding device comprises a circular tube-shaped mixing chamber and a cone-shaped hot carrier air inlet pipe, wherein the inner diameter of the top of the hot carrier air inlet pipe is smaller than that of the tail end of the hot carrier air inlet pipe; a discharge hole of the mixing chamber is connected with a feeding hole of the biomass gasifier; an air inlet hole of the mixing chamber is connected with a hot carrier air pipeline by the hot carrier air inlet pipe; the mixing chamber is provided with a catalyst inlet hole at the part close to the discharge hole of the mixing chamber; the mixing chamber is provided with a biomass raw material inlet hole which is close to the air inlet hole of the mixing chamber; and after extending into the mixing chamber from the air inlet hole of the mixing chamber, the top of the hot carrier air inlet pipe extends to the position under the biomass raw material inlet hole. The feeding device is simple in structure; the biomass raw material and a catalyst are evenly mixed together and come into contacted with each other for sufficient heat exchange; the catalyst is high in catalytic efficiency, and the calorific value of combustible gas produced by gasification is high.

Description

technical field [0001] The invention relates to the technical field of biomass gasification equipment, in particular to a feed device used in a biomass gasification furnace. Background technique [0002] With the gradual depletion of fossil energy, renewable energy has attracted worldwide attention. Since biomass is a renewable energy with the characteristics of renewability, low pollution and wide distribution, the development and utilization of biomass fuel has been become one of the focuses of the world's attention. Biomass raw materials are mainly crop straw and forest waste. [0003] The Chinese invention patent document with the patent application number 201210172196.3 discloses a stepped biomass automatic feeding device. A funnel-shaped hopper is arranged on the top of the biomass gasifier, and a biomass feeder is installed inside the biomass gasifier. The grate connected to the blower outside the gasifier; when working, the blower supplies catalyst to the biomass g...

AI Technical Summary

Problems solved by technology

The feeding devices of the above two structures both transport biomass raw materials and catalysts into the biomass gasifier from different inlets of the biomass gasifier, so the normal temperature biomass transported to the biomass gasifier The raw material and the high-temperature catalyst cannot be mixed uniformly and fully contacted, resulting in insufficient heat exchange between the two, which will directly affect the catalytic efficiency of the catalyst, resulting in insufficient gasification of the biomass raw material in the biomass gasifier. It will inevitably increase the amount of tar produced after biomass gasification, greatly reducing the gas calorific value of combustible gas

Images