Bundle radiation boiler capable of relieving combustion fouling of perbasic coal

Abstract

The invention discloses a bundle radiation boiler capable of relieving the combustion fouling of perbasic coal. The bundle radiation boiler comprises an n-type boiler body and a bundle radiation boiler body, wherein a horizontal flue is arranged on one side of the top of the n-type boiler body, and the n-type boiler body is communicated with a flue inlet at the top of the bundle radiation boiler body via the horizontal flue; and the bundle radiation boiler body comprises a radiation heat exchange part, a convection heat exchange part and a casing, wherein the radiation heat exchange part is located in the middle of the casing, the convection heat exchange part is located between the radiation heat exchange part and the casing, and a fume outlet is arranged at the upper end of the side wall of the casing and is higher than the part for convection and heat exchange. According to the invention, the adopted traditional n-type boiler is matched with the radiation boiler, the formation of a convection heat exchange surface is avoided within a temperature range of 600 DEG C to 1,100 DEG C, and the fouling problem of the heating surface can be relieved by utilizing the downgoing bundle radiation boiler and the flume, which are the same in the flowing direction and the arrangement direction.

Description

technical field [0001] The invention relates to a thermal gasification furnace of the coal gasification technology, in particular to a beam-shaped radiation boiler for reducing the pollution caused by the burning of high-alkaline coal. Background technique [0002] my country's power generation industry is dominated by thermal power generation, with thermal power installed capacity exceeding 70%. Thermal power coal mostly uses low-quality and low-grade coal. Slagging of boiler furnace water wall and contamination of convective heating surface are one of the important problems that affect the normal operation of power plant boilers for a long time. Slagging and contamination will reduce the heat transfer efficiency of the boiler, affect the output of the boiler, and seriously reduce the operating safety of the equipment. Severe slagging and contamination may lead to major accidents such as boiler flameout, tube burst, and unplanned shutdown. [0003] In order to prevent vari...

AI Technical Summary

Problems solved by technology

The proportion of high-alkaline coal fired in the boiler should not exceed 30%. When the proportion of mixed fired coal increases, the convective heating surface will be seriously contaminated and ash will form a flue gas corridor, and the flue gas will cause leakage of the high-temperature reheater and high-temperature superheater.

Since high-alkaline coal is mostly used in pithead power stations in Xinjiang, the demand for coal blended with foreign coal is large. This method is often limited by transportation conditions, which greatly increases operating costs.

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