Preparation method of corrosion-resistant and anti-scaling composite coating for water wall of waste-to-energy plant

Abstract

The invention discloses a method for preparing a corrosion-resistant and anti-scaling composite coating on a water wall of a waste-to-energy plant, belonging to the field of new material preparation. The technical scheme is as follows: mix and stir the mass fraction of acrylic acid of 40%, the mass fraction of acetic acid of 10% and the mass fraction of propyltrimethylsilane of 50% in a mixer at 120° C. to prepare the mixture A. The cross-linking agent is prepared by mixing and stirring the cross-linked acetic anhydride with a mass fraction of 50% and the mixed amide with a mass fraction of 50%. Then mix and stir ethyl cellosolve with mass fraction of 50% and diacetone with mass fraction of 50%, then add crosslinking agent with mass fraction of 20% and stir for 20 minutes to prepare mixture B. and many more. After coating, dry at a temperature of 180‑500 for 3 hours to form a semi-metallurgical bond with a bond strength of 230Mpa. Compared with the prior art, the coating material prepared by the present invention has a high temperature resistance of up to 800°C, a bonding strength of 230Mpa, a penetration function, a surface hardness of HV800, wear resistance and corrosion resistance (15% hydrochloric acid resistance), anti-sticking function, and Absorbs heat energy and has a long service life.

Description

technical field [0001] The invention relates to a method for preparing a corrosion-resistant and anti-scaling composite coating on a water cooling wall of a garbage power plant, belonging to the field of new material preparation. Background technique [0002] With the increase of the calorific value of waste, the high temperature corrosion of waste heat boilers in waste incineration power plants has been plagued by its safety and stability. Therefore, it is imminent to solve the problem of high temperature corrosion of waste heat boilers in waste incineration power plants. The high-temperature corrosion of waste-to-energy plants has played a key role in the safety and stability of unit operation. At present, most of the research on corrosion problems in waste-to-energy plants in my country focuses on superheaters and heat exchangers, but according to waste-to-energy plants According to the actual operation survey, the corrosion problem of the water wall of the waste incinerat...

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Problems solved by technology

The high-temperature corrosion of waste-to-energy plants has played a key role in the safety and stability of unit operation. At present, most of the research on corrosion problems in waste-to-energy plants in my country focuses on superheaters and heat exchangers, but according to waste-to-energy plants According to the actual operation survey, the corrosion problem of the water wall of the waste incinerator is also relatively serious.

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