High-temperature-resisting anti-corrosive thermal-insulation composite lining structural member and manufacturing method thereof

Abstract

The invention discloses a high-temperature-resisting anti-corrosive thermal-insulation composite lining structural member and a manufacturing method thereof. The high-temperature-resisting anti-corrosive thermal-insulation composite lining structural member comprises a metal shell, a light thermal-insulation lining material layer, a cellucotton layer and an anchor nail, further comprises a dew-point corrosion preventing coating layer, and can also comprise high-temperature-resisting alloy-steel wires and a high-temperature-resisting fiber paper layer. The manufacturing method comprises the following steps of welding and fixing the head of the anchor nail on the inner wall of the metal shell body, blade-coating the dew-point corrosion preventing coating layer, applying the light thermal-insulation lining material layer, and spray-coating the cellucotton layer. According to the invention, a composite lining layer is formed by the dew-point corrosion preventing coating layer, the light thermal-insulation lining material layer and the cellucotton layer through a special structure, which play the roles of resisting high-temperature, preventing dew-point corrosion and insulating heat simultaneously, and ensures that the composite lining layer can be combined with a shell body of a thermal facility into a firm integer; meanwhile, the composite lining structural member has better strain property on expansion on heating and contraction on cooling, and makes petrochemical thermal power equipment be used for a long time in the reliable and economical premise.

Description

technical field [0001] The invention relates to a lining structural part for high-temperature thermal power equipment and a manufacturing method thereof, in particular to a high-temperature-resistant, anti-corrosion, heat-insulating composite lining structural part for high-temperature thermal power equipment and a manufacturing method thereof. Background technique [0002] In petrochemical and other high-temperature thermal equipment (including kilns), the scientific design of the lining structure and the optimal selection of materials are the keys to determine whether the equipment can adapt to the working conditions at full load for a long period of time. [0003] The characteristics of petrochemical thermal power equipment are: ①The equipment has a large volume, a large heat dissipation area, and a large heat loss. ② The composition of the medium is complex, containing many corrosive components such as sulfur, nitrate, and chlorine, and it is easy to generate multiple ac...

AI Technical Summary

Problems solved by technology

②The composition of the medium is complex, containing many corrosive components such as sulfur, nitrate, and chlorine, and it is easy to generate multiple acidic gases. In this way, it is easy to generate acidic liquid at high temperature dew point, resulting in high temperature acid dew point corrosion

③ The internal structure of the thermal power equipment is complex, which can easily cause the high-temperature airflow to form a vortex, causing unbalanced erosion of certain parts and walls

④After the equipment is put into production, the continuity is strong, and production cannot be stopped for maintenance at will

The disadvantage of this patent is that refractory cement is used as the anti-dew point corrosion coating. Since refractory cement is an inorganic material, there are gaps, which will cause acid gas and water droplets to corrode through the gaps, and the anti-corrosion effect is not good.

The lining material can only play the role of high temperature resistance and heat insulation but not anti-corrosion

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