Chain furnace grate protecting method for incinerating biomass fuel and its special device

Abstract

The invention discloses the guard method of the fire grate of grate-fired furnace used to burn the biological materials, before laying the biological materials on the chain grate by the hopper, first lay a stable substance bed that can not generate chemical reaction with the alkali metals or its oxide in the burnt ash of biological materials through the hopper at the foreside of biological materials hopper, then lay the biological fuel on the narrated stable substance by the hopper. Therefore, using the method of the present invention, the fire grate made by relative low price of the ordinary material can be used, it can effectively protect against corrosion of the grate, avoid burning-out on the high temperature, improve the layout of the wind and combustion conditions of the grate at the same time and greatly reduce the cost of the grate. The specialized devices comprise stable material transportation equipment, cooling equipment, screening equipment and sending-back equipment. Thus the device can make the stable material repeatedly recycled, and lower overall operating costs.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering, and relates to a protection method and a special device for the fire grate of a chain furnace burning biomass fuel, and is especially suitable for a protection method and a special device for the fire grate of a chain furnace burning low-ash biomass fuel . Background technique [0002] Biomass fuel is a renewable new energy source. It is a general term for organic combustibles produced by photosynthesis. Combustibles such as various crops, trees, and weeds are all biomass fuels. my country is a large agricultural country with abundant biomass fuels. Therefore, the development and utilization of biomass fuel resources in my country is of great significance. It can not only alleviate the energy crisis, reduce the dependence on fossil fuels, but also reduce environmental pollution. [0003] At present, the direct incineration of biomass fuel is realized by using chain furnace. T...

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Problems solved by technology

[0009] The object of the present invention is to solve the defects that the grate of the chain furnace in the above-mentioned prior art is unfavorable for uniform air distribution, low combustion efficiency and high cost of using high temperature resistant and corrosion resistant alloy steel grate when burning biomass fuel , to provide a chain furnace that uses a grate made of relatively low-priced ordinary cast iron materials. When burning biomass fuel, it can effectively protect the grate from corrosion, prevent the grate from being burned out at high temperatures, and improve The air distribution and combustion conditions of the grate can also greatly reduce the cost of the grate. The grate protection method and special device for the chain furnace burning biomass fuel

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