A Boiler Operation Control Method for Reducing the Influence of High Temperature Corrosion of Water Wall

Abstract

The invention discloses a boiler running control method for reducing water-cooled wall high-temperature corrosion influences. The running control method comprises the steps that the outlet oxygen volume of an economizer and the running manner of coal mills are adjusted, the average value of the outlet oxygen volume of the economizer is adjusted to be 3.0%-4.6%, and the rotation speed of a dynamicseparator of each coal mill is adjusted to be 60 rpm-75 rpm; and the output of the coal mills is controlled, the A mill output is 40 t / h-45 t / h, the B mill output is 42 t / h-49 t / h, the C mill output is 32 t / h-38 t / h, the D mill output is 33 t / h-40 t / h, the E mill output is 37 t / h-44 t / h, and the F mill output is 34 t / h-41 t / h. By adoption of the control method, front-back opposed combustion mannerboiler hearth combustion can be effectively improved, water-cooled wall face atmosphere parameters are improved, the boiler efficiency is improved, and the boiler water-cooled wall high-temperature corrosion influences are reduced.

Description

technical field [0001] The invention relates to a boiler operation control method, in particular to an operation control method for reducing the influence of high-temperature corrosion of a water-cooled wall on a boiler in a front-to-back opposed combustion mode. Background technique [0002] High-temperature corrosion in the water wall area of ​​power plant boilers is a common problem in coal-fired power plants, and it is also one of the main factors affecting the safe production of electric power. High-temperature corrosion refers to the metal corrosion on the flue gas side that occurs at the high-temperature flue gas environment on the high-temperature heating surface of the metal. Corrosion can reduce the wall thickness and strength of the water-cooled wall, and easily cause accidents such as pipe bursts and leakage, resulting in The unplanned outage of the unit seriously affects the safety and economy of the thermal power unit operation and the safe production and dispa...

AI Technical Summary

Problems solved by technology

However, the overfire air technology is prone to cause coking and high temperature corrosion in the burner area

Severe high-temperature corrosion of water-cooled walls is common in domestic and foreign opposed-fired boilers, especially the water-cooled walls on both sides of the burner area of ​​ultra-supercritical and supercritical swirling opposed units are more likely to cause high-temperature corrosion

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