Circulating fluidized bed boiler for purely burning furfural residues

Abstract

The invention belongs to the technical field of fluidized bed boilers and particularly relates to a circulating fluidized bed boiler for purely burning furfural residues. According to the circulating fluidized bed boiler for purely burning the furfural residues, a high-temperature platen superheater is arranged in a hearth; a fluidized bed combustion chamber is arranged on the lower portion of the interior of the hearth; a wind distribution plate is arranged at the bottom of the fluidized bed combustion chamber; a wind cap is arranged on the wind distribution plate; a wind chamber is arranged below the wind distribution plate; a residue discharge pipe is arranged in the wind chamber; an ignition device is arranged on the wind chamber; the upper portion of a separator communicates with an outlet in the upper portion of the hearth; a lower vertical pipe of the separator is connected with the upper portion of a material return system; the lower portion of the material return system communicates with the fluidized bed combustion chamber; a low-energy-consumption self-balancing material return valve is mounted on a vertical pipe of the material return system; an inlet of a vertical shaft flue communicates with an outlet tube in the center of the upper portion of the separator; an evaporation pipe bundle, low-temperature superheaters, economizers and an air preheater are all arranged in the vertical shaft flue; and the vertical shaft flue is further provided with soot blowing points.

Description

technical field [0001] The invention belongs to the technical field of fluidized bed boilers, in particular to a circulating fluidized bed boiler which uses furfural slag as a single fuel and purely burns furfural slag. Background technique [0002] Furfural slag is the waste residue produced when furfural is extracted from corncobs. It has high volatile content, high water content, and a little acid residue, and low ash content. Most of the furfural slag can be used in the following ways: burning in a small fixed grate furnace, but it is difficult to meet the national environmental protection requirements; or stacking and discarding naturally, resulting in pollution. Due to the increasingly strict national environmental protection policies and the gradual improvement of people's living standards, it is urgent to seek a new technology to fully utilize furfural slag from its original state to meet the dual requirements of economic and environmental benefits. [0003] Charact...

AI Technical Summary

Problems solved by technology

Most of the furfural slag is used in the following ways: using small fixed grate furnaces to burn, but it is difficult to meet the national environmental protection requirements; or natural stacking, waste, and pollution

Images