High-pressure boiler tubes clear the depth effect

Severe temperature change occurred after burning high sulfur anthracite through the boiler corrosion. Analysis of water wall tube at a high temperature corrosion temperature conditions in a reducing atmosphere high temperature sulfur corrosion mechanism of chlorine corrosion and high-temperature corrosion and corrosion mainly produce, combined use of low sulfur coal than the Yangquan Datong bituminous coal the actual situation, the combustion system transformation. High pressure boiler tube clear the depth shall not exceed the nominal wall thickness of the negative deviation, its cleanup at the actual wall thickness of not less than the minimum allowed. Prevent high-pressure boiler in the fire rapidly warming deformed slump, its measures are varied, the key is to take different approaches depending on the circumstances, such as the use of insulation, refractory steel barrier direct flame burning, reduce the speed of heat transfer postpone the steel temperature, the strength becomes weak time. But no matter what method adopted, the principle is the same. Fire retardant paint is a kind of fire in recent years, more advanced technical measures. Since the impurity elements for high-pressure boiler quality impact, high levels of harmful elements in steel products and the inclusion of control has very strict requirements, to try all kinds of impurity elements are required to control at very low levels, often in production using secondary refining the production process in order to protect its cleanliness.

Special reminder, high pressure boiler tube One installation is difficult, especially supercritical once-through boiler no drum, increasing the starting system, heating pipe systems, bulky traditional subcritical boiler rigid beam than quantity, and all with the heating surface welding installation difficult. High-pressure boiler tubes often in high temperature and pressure conditions when using the tube under the action of high temperature gas and water vapor, oxidation and corrosion will occur.