Datang Fuxin Coal-to-Natural Gas Chemical Cleaning Project was contracted and constructed by Rui Chi Hi-Tech Co., Ltd. Recently, as the chemical cleaning hazard notification signs and warning lines have been set up, the guardian and the relevant staff of the owner are in place, according to the progress requirements, the members of the Tang Fuxin Coal-to-Natural Gas Chemical Cleaning Project Department of Riichi Hi-Tech Data Corporation are ready to complete the preparations. The chemical cleaning of the sulphur recovery unit has been gradually launched. The Liaoshen Evening News reported on the project on June 6, 2020.

The chemical cleaning work of the sulfur recovery device is mainly to chemically clean the boiler feed water pipeline and the external medium pressure steam pipeline. The inside of equipment and pipelines will produce "scales" due to corrosion and rust. These phenomena will definitely affect the use of equipment and pipelines and the quality of products when the device is started. The smoothness of the equipment and pipelines will directly affect the product. Therefore, the carbon steel equipment and process pipelines of the installation must be chemically cleaned before starting up. The cleaning method adopted by Rui Chi Hi-Tech for this sulfur recovery device is cyclic cleaning. The cyclic cleaning is mainly to form a closed circulation loop between the equipment and the equipment by temporary piping, and then use the circulation cleaning pump to add hydrogen to the entire system according to the program. Sodium oxide, citric acid, sodium nitrite and other pharmaceutical solutions are constantly flowing, and water washing and system pressure test, acid washing, waste liquid treatment, rinsing, neutralization and passivation are carried out one by one, so as to achieve degreasing, degreasing, and degreasing. Rust and protect the pipe wall.