Voltage increasing subsection heating high-temperature erosion abrasion machine

Abstract

The invention relates to a pressurized multistage heating high temperature erosion abrasion tester for simulating abrasion research of a coal burning boiler of a heat power plant, comprising a high temperature air-heating furnace, an abrasive grain feeder, a sample heating erosion machine, an erosion air feeding piping, after the erosion air feeding piping impenetrates the high temperature air-heating furnace, and directly passes over the sample heating erosion machine, an exit of the erosion air feeding piping points to the middle of a sample block vertically arranged in the sample heating erosion machine and forms a certain angle, an exit of the abrasive grain feeder is connected on the erosion air feeding piping between the high temperature air-heating furnace and the sample heating erosion machine. Provided is a pressurized multistage heating high temperature erosion abrasion tester for simulating erosion-corrosion operating conditions of the coal burning boiler of the heat power plant and validating spray coating performance of the boiler. Compared with the prior art, the invention has the advantages of good erosion abrasion simulating effect, short testing period, high testing efficiency and low testing cost.

Description

technical field [0001] The invention relates to a high-temperature erosion wear tester, in particular to a pressurized segmental heating high-temperature erosion wear tester for simulating the wear research of a coal-fired boiler in a thermal power plant. Background technique [0002] Compared with other types of boilers, the working conditions of coal-fired boilers in thermal power plants are extremely harsh, and higher requirements are placed on the material properties of the heating surface pipes. The working conditions of coal-fired boilers in thermal power plants have the following main characteristics: [0003] One is high temperature erosion and wear, which is the main reason for the heating surface failure and tube burst of coal-fired boilers in thermal power plants. In coal-fired boilers in thermal power plants, the largest coal particle size is more than ten millimeters (the average coal particle size of pulverized coal furnace is less than 0.1mm), the material co...

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Problems solved by technology

[0004] The second is high-temperature oxidation. The temperature in the furnace is about 900°C, and the high-temperature oxidation phenomenon on the surface of the heating surface such as water-cooled wall tubes is very serious.

[0005] The third is gas corrosion. The flue gas in the furnace often contains some traces of corrosive gases, such as SO 2 , SO 3 、H 2 S, etc., make high-temperature corrosion and high-temperature wear alternately, and corrosion promotes the speed of wear to further aggravate

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