Composite biomass staged gasification furnace

Abstract

The invention relates to the technical field of gasification furnaces, and in particular to a composite biomass staged gasification furnace. The furnace comprises a furnace body; a fire grate is fixedon the side wall of the lower part in the furnace body; a space below the fire grate is a slag cavity; an ash discharge port is formed in the side wall of the furnace body corresponding to the slag cavity; a filter screen is also fixed on the inner wall of the furnace body; the filter screen is positioned above the fire grate; a fine filter is fixed to the top wall of the interior of the furnacebody, a feeding mechanism is fixed to the outer side of the furnace body, a primary filtering mechanism is fixed to the feeding mechanism and connected with the feeding mechanism through a feeding pipe, and the primary filtering mechanism is connected with the upper portion of the side wall of the furnace body and a fine filtering mechanism through a first air pipe and a second air pipe. Accordingto the composite biomass staged gasification furnace, the content of tar and smoke dust in fuel gas is greatly reduced, the fuel gas quality is improved, equipment is protected, the filtered tar is returned to the furnace again to be subjected to high-temperature cracking to generate small molecular fuel gas, then the fuel gas generation efficiency is improved again, and the tar generation amountis reduced.

Description

technical field [0001] The invention relates to the technical field of gasification furnaces, in particular to a composite biomass graded gasification furnace. Background technique [0002] my country is extremely rich in biomass energy resources. Biomass gasification technology is currently the most extensive technical means to utilize biomass energy. Using biomass fuel gasification to generate electricity can make full use of agricultural waste, save resources, and protect the ecological environment. [0003] When the existing biomass gasifier gasifies biomass, it will produce tar products. Tar has a special odor, is flammable and corrosive, so it can lead to a decrease in gasification efficiency, and it is harmful to gasification equipment and gas consumption. All equipment will have adverse effects, resulting in reduced equipment life and increased risk. In view of this, we propose a composite biomass grading gasifier. Contents of the invention [0004] The object of ...

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Problems solved by technology

[0003] When the existing biomass gasifier gasifies biomass, it will produce tar products. Tar has a special odor, is flammable and corrosive, so it can lead to a decrease in gasification efficiency, and it is harmful to gasification equipment and gas consumption. Equipment will have adverse effects, resulting in reduced equipment life and increased risk, in view of this, we propose a composite biomass graded gasifier

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