Coal-saving high-temperature boiling furnace

Abstract

The invention discloses a coal-saving high-temperature boiling furnace, which comprises a blower, a coal feeding system, a slag hole, a small nozzle button, a large nozzle button, a boiling combustion chamber, a high-temperature resistant material, a fire barrier, a settling chamber and a second combustion chamber, wherein an outlet of the coal feeding system is connected with the boiling combustion chamber; an external wall of the boiling combustion chamber is made of the high-temperature resistant material; the small nozzle button and the large nozzle button are arranged at the bottom of the boiling combustion chamber; the small nozzle button and the large nozzle button correspond to the outlet of the blower; the fire barrier is arranged between the boiling combustion chamber and the settling chamber; and the second combustion chamber is arranged on the fire barrier. The coal-saving high-temperature fluidized bed furnace has the advantages that: fire coal of 0 to 10 mm is mechanically fed to a distributor in the furnace; high-pressure air passes through the distributor to make coal particles in the furnace and furnace charges boil; and because the coal particles only account for1 percent of the furnace charges, the contact area of the coal particles and air in a boiling combustion process is large, a speed of relative movement is high, a time interval between feed-in of rawcoal and discharge-out of the raw coal is long, and some low-quality coals with a low heating value can be stably combusted by the second combustion chamber, so a quite high burn-off degree is achieved.

Description

technical field [0001] The invention relates to a coal-saving high-temperature fluidized furnace, which belongs to the technical field of material drying production. Background technique [0002] The typical structure of the common fluidized fluidized furnace combustion chamber includes four parts: air distribution system, fluidized bed, feeding and slag discharge system. ① Air distribution system. The bottom of the combustion chamber is an air distribution plate, and holes are directly opened on the plate or many air caps with small ventilation holes are installed. The function of the air distribution plate is to carry the material layer and make the air rising speed evenly distributed along the cross section of the furnace. ② Fluidized bed. A certain amount of bed material (including solid fuel and a large amount of ash or limestone particles) is placed on the air distribution board. During operation, when the air in the material layer reaches a certain rising speed, t...

AI Technical Summary

Problems solved by technology

The disadvantages are: the fine particle fuel in the fluidized bed is easily carried out by the flue gas, so the unburned loss is large and the combustion efficiency is low; when burning low-quality coal with high ash content, a large amount of fly ash fills the furnace, which seriously affects the combustion state

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