Boiler heating surface simulation experiment device

Abstract

The invention discloses a boiler heating surface simulation experiment device. The boiler heating surface simulation experiment device comprises an air powder supply system, a combustion cylinder, anignition source, a water cooling wall pipe, a cooling system and a temperature measuring system, wherein the air powder supply system is used for providing air powder mixtures with different concentrations; the combustion cylinder comprises a combustion chamber communicated with the air powder supply system; the ignition source is used for igniting the air powder mixtures, and the ignited air powder mixtures are combusted in the combustion chamber; the water cooling wall pipe is arranged in the combustion chamber and comprises a pipe wall and a pipe cavity which is formed in the pipe wall andused for medium flowing; the cooling system is communicated with the pipe cavity of the water cooling wall pipe in a sealed mode and used for providing cooling media for the pipe cavity; the temperature measuring system comprises a first temperature measuring device used for measuring the wall surface temperature of the pipe wall and a second temperature measuring device used for measuring the smoke temperature in the combustion chamber. The boiler heating surface simulation experiment device can simulate the process of pulverized coal combustion in a boiler hearth and the acting process on aboiler heating surface, and therefore the high-temperature corrosion and slagging mechanism of pipes of the boiler heating surface can be studied.

Description

technical field [0001] The invention relates to the field of thermal equipment simulation experiments, in particular to a simulation experiment equipment for a heating surface of a boiler. Background technique [0002] At present, due to the high sulfur content of the incoming coal in large-scale power plant pulverized coal boilers, the lack of oxygen and low nitrogen combustion in the furnace and other factors, the high-temperature corrosion and slagging of the heating surface of the furnace are serious. High temperature corrosion will lead to rapid thinning of the tube wall on the heating surface and frequent tube bursts. After slagging on the heating surface of the boiler, the heat exchange capacity with the flue gas decreases, resulting in overheating of the tube wall, an increase in the amount of desuperheating water, and a decrease in boiler efficiency. The high-temperature corrosion and slagging of the heating surface have seriously affected the safety and economy of...

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Problems solved by technology

[0002] At present, due to factors such as high sulfur content in the incoming coal quality of large-scale power station pulverized coal boilers, lack of oxygen and low nitrogen combustion in the furnace, etc., the high-temperature corrosion and slagging of the furnace heating surface are serious.

High temperature corrosion will lead to rapid thinning of the tube wall on the heating surface and frequent tube bursts

After slagging on the heating surface of the boiler, the heat exchange capacity with the flue gas decreases, resulting in overheating of the tube wall, an increase in the amount of desuperheating water, and a decrease in boiler efficiency

The high-temperature corrosion and slagging of the heating surface seriously affect the safety and economy of the unit's operation

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