Enhanced 300MW circulating fluidized bed boiler deslagging pipe inlet smooth-deslagging device and installation method

Abstract

The invention relates to an enhanced 300MW circulating fluidized bed boiler deslagging pipe inlet smooth-deslagging device and an installation method. An existing slag falling pipe inlet structure angle is adverse to slag falling, blockage is easily caused, the distance between a slag falling pipe inlet and a funnel cap is far, and bed materials are accumulated to hinder deslagging. The enhanced 300MW circulating fluidized bed boiler deslagging pipe inlet smooth-deslagging device provided by the invention comprises a deslagging pipe, wherein the angle of the deslagging pipe and a perpendiculardirection form 30 degrees; the deslagging pipe comprises a cylinder I (3); the cylinder I (3) is connected with a cylinder II (4) through a connecting flange; the cylinder II and a cylinder III (5) are fixed through welding; a supporting and guiding device (2) is arranged on the outer wall of the cylinder III; a seal box (8) is welded onto an inclined plane of the upper part of the cylinder I; the outer side of the seal box and a boiler steel girder are fixed; one end of a hoisting device (1) is connected with a boiler support beam through a bolt; the other end of the hoisting device is connected with the outer wall of the cylinder III through a support lug; and a funnel cap (7) arranged on a center line of a deslagging pipe inlet is 150mm away from the lower part of the slag falling pipe. The invention is applied to the enhanced 300MW circulating fluidized bed boiler deslagging pipe inlet smooth-deslagging device.

Description

Technical field: [0001] The invention relates to a device and an installation method for enhancing the smooth discharge of slag at the entrance of a slag discharge pipe of a 300MW circulating fluidized bed boiler. Background technique: [0002] The entrance of the original slag fall pipe, that is, the outlet of the furnace bed material, is designed to have a pipe diameter of 754mm and an inner diameter of 250mm. It is poured with wear-resistant and high-temperature resistant castables. The castables on the upper part of the air distribution plate are arranged in parallel, and 2*1348 hoods are arranged on the upper part of the air distribution plate. The distance between the hoods and the lower part of the slag discharge pipe entrance is 300mm. ; Second, the inner diameter of the slag falling pipe is small, which is easy to block; Third, the entrance of the slag falling pipe is far away from the air cap, and the accumulation of bed material hinders the slag dropping. Wind ca...

AI Technical Summary

Problems solved by technology

[0002] The entrance of the original slag fall pipe, that is, the outlet of the furnace bed material, is designed to have a pipe diameter of 754mm and an inner diameter of 250mm. It is poured with wear-resistant and high-temperature resistant castables. The castables on the upper part of the air distribution plate are arranged in parallel, and 2*1348 hoods are arranged on the upper part of the air distribution plate. The distance between the hoods and the lower part of the slag discharge pipe entrance is 300mm. ; Second, the inner diameter of the slag falling pipe is small, which is easy to block; Third, the entrance of the slag falling pipe is far away from the air cap, and the accumulation of bed material hinders the slag dropping. Wind cap, this distance is easy to cause accumulation of bed materials

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