Cyclone separator with wear-resistant target section and guiding device for circulating fluidized bed boiler

Abstract

A cyclone separator with a wear-resisting target section and a guiding device for a circulating fluidized bed boiler. The cyclone separator comprises a separator inlet flue, a separator barrel body connected with an outlet of the separator inlet flue, a separator cone and a separator standpipe, which are successively connected below the separator cylinder body, and a separator central cylinder inserted into the upper part of the separator barrel body. The lower part of the separator central cylinder is provided with a central cylinder necking; the separator inlet flue is a tapered inlet flue, which is provided inside with a smoke guiding boss, and a smoke diversion part at the outlet; the smoke guiding boss and the smoke diversion part are covered with a high-strength refractory wear-resistant material layer; and one or a plurality of soot blowing mouths are arranged surrounding the smoke guiding boss. Optimization on the flow field in the cyclone separator reduces the direct impact of airflow and wear on the refractory wear-resistant material in the target section, and can improve the continuous operation cycle of the circulating fluidized bed boiler.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed boilers, and in particular relates to a circulating fluidized bed boiler cyclone separator with a wear-resistant target area and a guiding device. Background technique [0002] my country is the country with the largest number of installed circulating fluidized bed boilers in the world, and circulating fluidized bed boilers have gradually become an indispensable and important part of the field of thermal power generation. Affected by factors such as poor coal types, the failure rate of circulating fluidized bed boilers is high, and the failure of cyclone separators is a major problem affecting the long-term efficient operation of circulating fluidized bed boilers. [0003] The cyclone separator is an important equipment for the circulating fluidized bed boiler to separate the circulating materials. Its function is to separate and capture the particles from the flue gas by using t...

AI Technical Summary

Problems solved by technology

If the cyclone separator breaks down, it will bring the following problems: (1) Fine particles cannot be effectively burned and affect the operating economy of the boiler; (2) The increase in the amount of fly ash will aggravate the wear of the tail heating surface and increase the energy consumption of the dust removal equipment; (3) The amount of circulating ash entering the circulation loop decreases, and the circulation rate decreases, which affects the heat transfer characteristics of the furnace; (4) If the cyclone separator is blocked, the boiler will be forced to stop for maintenance

This method changes the flow defense line of the airflow, which will affect the separation efficiency. The construction of the corrugated surface is very difficult. At the same time, if the design of the downtilt angle is implemented in the boiler renovation, a large area of ​​the boiler water wall needs to be changed, and the renovation is difficult.

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