High-temperature reactor inner wall corrosion damage prewarning method

Abstract

The invention discloses corrosion damage warning method of in-wall in high-temperature reactor, comprising the following steps: according to the quality and energy conservation principles calculate average temperature of gas and temperatures on the border of connected slag blanket at different position and height; obtain temperature in reactor by thermocouple, and according to this, calculate initial temperature distribution of exterior surface of flame retardant coating through Lagrange quadratic interpolation method; establish the steady-state thermal conductive partial differential reasoning equation of top and lateral section of the inner wall including the slag blanket; then calculate the inner wall temperature distribution and the thickness of the slag layer at different height including the slag blanket through the equation; predict the border position of solid slag blanket attached on the in-wall of the reactor; integrate into the corrosion damage warning message of in-wall of reactor after judgment and compare of thickness of the slag layer at different height of the in-wall in reactor to warning threshold value. The invention provides accurate, fast and lower-cost corrosion damage warning methods of in-wall in high-temperature reactor.

Description

technical field [0001] The invention relates to a method for early warning of corrosion damage on the inner wall of a high-temperature reactor. Background technique [0002] The reaction process in the high-temperature reactor is a complex reaction process with multiple operating variables and multi-process coupling. Further improving the overall operation and control level of the high-temperature reactor, improving the life of the inner wall of the reactor and ensuring safe production are key issues. For the inner wall of the reactor, the working conditions are harsh, there is high temperature, high speed, and high matte gas scour, and the inner wall is easily burned and sudden accidents occur. Research and development of a pre-warning method for corrosion damage on the inner wall of the high-temperature reactor can increase the accuracy of the boundary identification of the slag layer on the inner wall of the reactor, so that operators can timely and accurately judge the ...

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Problems solved by technology

[0004] Among the above methods, method 1 and method 2 can only partially detect the corrosion damage of the inner wall of the reactor based on experience, and method 3 obtains thermal images by capacitive sensor arrays by means of the difference in dielectric constant between coke and ore on the blast furnace. Therefore, it cannot be transferred to a high-temperature reactor, and the method 4 infrared thermal imaging camera is very expensive

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