Ash valve

Abstract

The invention provides an ash valve. A valve seat with an ash discharge opening is arranged in a shell. The ash valve further comprises a valve head, a valve rod with two closed ends, and an executing mechanism. One end of the valve rod is inserted into the valve head and welded to the valve head as a whole. The valve rod is of an interlayer structure and comprises an outer valve rod tube and an inner valve rod tube. The two ends of the outer valve rod tube are closed. One end of the inner valve rod tube is closed, and the other end of the inner valve rod tube is open. The inner valve rod tube is inserted into the outer valve rod tube. The closed end of the inner valve rod tube is exposed out of the outer valve rod tube and is provided with a water inlet. A screw plate is arranged on the outer wall of the inner valve rod tube, and a water outlet is formed in the top of the outer valve rod tube. The valve seat is a hexagonal-pyramid-shaped arc valve seat, and the front end of the valve head is a hexagonal pyramid face or a cone ball face and is tangent to the hexagonal pyramid. The valve rod penetrates out of the shell to be connected with the executing mechanism. On the premise that equipment space is not increased, the adjusting capacity of ash flow is comprehensively achieved, and the fault that an ash discharge channel is blocked due to coking caused by the change of the ash fusion point is avoided.

Description

technical field [0001] The invention relates to an ash and slag valve, which belongs to boiler combustion bottom slag discharge control equipment, in particular, it can close the corresponding slag discharge port of the boiler without stopping the furnace, and then maintain the subsequent slag conveying equipment of the boiler. It is widely used in metallurgy, electric power, chemical industry and other industrial fields. Background technique [0002] Since the 100MW evaporating CFB boiler was put into use in my country in 1996, the application and development of large CFB boilers have been rapidly advancing in China. In particular, the popularization and application of large CFB boilers burning low-quality coal has promoted the development of clean application of low-quality coal in boilers, and found a simple and convenient channel for the consumption and treatment of low-quality coal. [0003] With the commissioning of large CFB boilers burning low-quality coal or blendi...

AI Technical Summary

Problems solved by technology

This will make it difficult to control the amount of slag discharged from the bottom of the boiler, and the combustion cannot continue normally

Especially when repairing or replacing the follow-up supporting equipment of the boiler, the boiler must be shut down, which brings great trouble to daily repair and maintenance.

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