High temperature fluidized bed combustion device

Abstract

The invention relates to a high temperature fluid bed combustion device in the energy resource field. The device comprises a furnace, an inclined uneven air distribution plate, a low speed primary air chamber, a high speed primary air chamber, an air classification deslagging pipe, a secondary air inlet opening, a material inlet opening, classifying air pipes and a deslagging opening. The connection relations are that the inclined uneven air distribution plate is arranged at the bottom of the furnace, the low speed primary air chamber and the high speed primary air chamber are arranged under the inclined uneven air distribution plate, the low speed primary air chamber is positioned under the lower end position of the inclined uneven air distribution plate, the high speed primary air chamber is positioned under the higher end position of the inclined uneven air distribution plate, the secondary air inlet opening is arranged on the upper part of the furnace, the material inlet opening is arranged on the furnace wall close to the low speed primary air chamber, the deslagging opening is positioned at the crossing position of the lower end of the inclined uneven air distribution plate and the furnace wall, one end of the air classification deslagging pipe is connected with the deslagging opening, the classifying air pipes are arranged on the two sides of the air classification deslagging pipe, and the classifying air pipes are communicated with the air classification deslagging pipe. The device of the invention is simple, the investment expense is low, the reliability is high, the overall combustion reaction speed is enhanced, and the fly ash carbon content is reduced.

Description

technical field [0001] The invention relates to a device in the technical field of combustion equipment, in particular to a high-temperature fluidized bed combustion device. Background technique [0002] As an advanced combustion technology, the fluidized bed has been widely used because of its strong adaptability to coal types and favorable pollutant control. Because the furnace temperature of the fluidized bed is lower than that of the pulverized coal furnace, only 850-900°C, the bed material is usually circulated repeatedly in it, that is, the circulating fluidized bed method. It is generally believed that the combustion efficiency is close to the level of the pulverized coal furnace with the same capacity. Extensive practice of burning highly reactive fuels such as lignite does show that circulating fluidized bed boiler fly ash has a low carbon content. But in fact, the vast majority of circulating fluidized bed boilers in my country use difficult-to-combustible coals, ...

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Problems solved by technology

This patent is a very practical and valuable improved circulating fluidized bed device for difficult-to-combustible coal, but due to the addition of fly ash collectors, return controllers, and pneumatic conveying injectors, the system is complicated and greatly increases investment costs and operation. Although it is beneficial to reduce the carbon content of fly ash, it cannot fundamentally solve the problem of low combustion efficiency

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