Improved control device for adding CFB power plant bed materials

Abstract

The invention belongs to the technical field of bed material adding and particularly relates to an improved control device for adding CFB power plant bed materials. The improved control device comprises a slag bin, an oscillator, a slag conveying pipe A, a slag conveying pipe B, a slag conveying pipe C, a slag conveying pipe D, a weight sensor set A, a weight sensor set B, a weight sensor set C and a manhole. One end of the slag conveying pipe A communicates with the bottom of the slag bin, the other end of the slag conveying pipe A forms Y-shaped connection with the slag conveying pipe B andthe slag conveying pipe C, a high pressure draught fan is arranged on the slag conveying pipe A, the weight sensor set A is further arranged, a bucket elevator is arranged below the other end of the slag conveying pipe B, the weight sensor set B is arranged at the lower end of the bucket elevator, the slag conveying pipe C and the slag conveying pipe D form V-shaped connection, a shut-off valve isinstalled at the connection part of the slag conveying pipe C and the slag conveying pipe D, the oscillator is installed on the slag conveying pipe D, the other end of the slag conveying pipe D penetrates through the manhole in the boiler, and the weight sensor set C is arranged at a connector of the slag conveying pipe D and the manhole. The device can utilize the heat energy of furnace slag andcircularly comprehensively utilize furnace slag solid waste and can be widely applied to various boiler power plant bed material adding devices.

Description

technical field [0001] The invention belongs to the technical field of bed material addition, and in particular relates to an improved control device for bed material addition in a CFB power plant. Background technique [0002] my country's current energy structure system is dominated by coal. At the same time, in terms of power supply system, the power generation structure dominated by coal-fired generating units will not change for a period of time in the future. Circulating fluidized bed boiler (CFB) has the characteristics of high fuel utilization rate, high fuel adaptability, etc., and is encouraged to be popularized and applied by the state. [0003] In the ignition start-up stage of the CFB boiler, the starting bed material needs to be laid and replenished on the furnace air distribution plate and the feeder. In recent years, most units use boiler slag discharge as the starting bed material. At present, most CFB units use the coal conveying system to add bed material...

AI Technical Summary

Problems solved by technology

This scheme uses the existing coal delivery system of the power plant, and the operation is simple. However, if an accident occurs and the bed material needs to be added again, the raw coal bunker has too much raw coal, which makes the system unable to operate normally. Therefore, the raw coal needs to be emptied before the bed material can be added. Takes 5 hours or more

In addition, when the coal is transported by the belt, due to the non-standard and hardness of the slag particles, the belt will be greatly worn, and the replacement of the belt will also cause certain economic problems.

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