Title: Power plant boiler high temperature corrosion cause analysis and Prevention
Abstract
In recent years, the coal market, coal quality, heating surface of boiler high temperature corrosion phenomenon is relatively common, especially in subcritical, lean coal boiler water wall high temperature corrosion of pipe problems have become increasingly prominent, the part of the plant has been the cause of repeated bursting of water wall tube, each maintenance must be replaced by a corrosion standard wall pipe, causing great manpower, material waste, a serious threat to the safe and economic operation of power plant, power plant is causing unplanned outage is one of important factors.
In this paper due to the high temperature corrosion of water wall of #5boiler in xindianpowerplant tube explosion of water cooled by causing, wall surface atmosphere and experiment data, analyses the reason of high temperature corrosion of water wall, and puts forward the prevention measures. Power plant combining unit maintenance, prevention of high temperature corrosion in accordance with the requirements of measures, through a series of comprehensive treatment, boiler water wall high temperature corrosion phenomenon get changing apparently. On coal-fired power plants at present coal into the furnace coal seriously deviate from the designed value, high sulphur content of the actual situation, prevention of subcritical coal boiler water wall high temperature corrosion area has a certain referential significance.
Keyword: air heater：Boiler water wall tube；High temperature corrosion；Water wall surface atmosphere test；Cause analysis and Prevention；Comprehensive management
