A biomass gasifier grate system

Abstract

The invention discloses a biomass gasification furnace grate system, which is arranged in a furnace body. The gasification furnace grate system is sequentially arranged with an air inlet pipe, a main air pipe, a branch air pipe and a main air pipe from bottom to top Reinforcing pipe, four of which form the grate body; the grate body is dish-shaped, and the fan-shaped gap between the air inlet pipe, main air pipe, branch air pipe and main air pipe reinforcement pipe is the ash falling channel; The air inlet pipe, main air pipe, branch air pipe and main air pipe reinforcement pipe are all covered with split modular grates; the upper part of the grate body is an ash layer with a thickness of not less than 200mm. The volume of the dish-shaped grate of the invention is reduced by 5 times, the height is reduced by nearly 1 meter, the effective volume of the furnace can be increased by about 10%, and more RDF derived fuel can be accommodated. The ash-falling channels of the grate are increased, the ash-falling cross-section is increased by 2 times, the ash-falling is more uniform, the slump of the fixed charcoal combustion layer is also more uniform, and the chance of the grid body being burned by the unevenly slumped hot charcoal is reduced.

Description

technical field [0001] The invention relates to a gasification furnace, in particular to a grid system of a biomass gasification furnace. Background technique [0002] Biomass waste gasification application technology has been developed in my country for nearly 30 years, but it has not been commercialized for two reasons: low calorific value and miscellaneous properties. For the gasification application technology, the combustible gas has low calorific value and poor pyrolysis gasification performance. [0003] The coal gasifier grate scheme has always been used in the biomass gasifier grate, that is, the conical grate body, which has a large volume, a high grate body, a single ash drop channel, and a single air outlet, and the following problems exist: [0004] 1. In order to protect the grid body from being burned, the ash must be higher than the top of the grid body by more than 200mm. The large volume and high height of the grid body reduce the effective volume of the g...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the disadvantages of the grid body with few air outlets, uneven distribution of air outlets, and large height difference of the air outlets in the background technology; to overcome the ash falling congestion caused by the small ash falling cross-sectional area in the background technology, and the ash falling has local fast, The shortcoming of local slowness; overcome the shortcoming of high thermal loss rate in the background technology; overcome the problem of excessive heavy metal content in the ash slag in the background technology

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