Knowledge related to chemical cleaning

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Before putting new chemical equipment into operation, it must undergo chemical cleaning and passivation treatment. Practice has shown that chemical cleaning and passivation before driving is of great significance for production safety and economic efficiency. The economic benefits it generates are enormous. I. Purpose of cleaning and passivating before driving: During the rolling process, the raw materials used in manufacturing equipment such as steel pipes, steel plates, and stainless steel develop scale; during manufacturing, storage, transportation, and installation, rust, weld slag, as well as oil-based rust inhibitors applied to the steel for corrosion protection, along with impurities such as dust, sand, cement, and insulation materials, can also end up inside the equipment. As the capacity of the equipment increases, the time required from the production of steel pipes and plates, through equipment manufacturing, storage and transportation, installation, to its final operation becomes longer. The number of welds on the equipment increases, as does the surface area exposed to heat; as a result, the total amount of various impurities such as scale, rust, slag, rust inhibitors, and sediment increases. After cleaning, a dense chemical passivation film is formed on the clean metal surface. This passivation film effectively prevents the reformation of dirt and provides good protection for the equipment. Protect the equipment from corrosion or other chemical damage. It can effectively ensure the safety of the equipment and extend its service life. The chemical cleaning and passivation before starting operation mainly include the following points: 1. To ensure smooth operation and that the product meets the standards from the first attempt. 2. Maintain normal production and extend the service life of equipment. 3. Increase production capacity and ensure product quality. 4. Reduce energy consumption and lower production costs. 5. Decrease production accidents and ensure production safety. 6. Improve the appearance of equipment and purify the environment. II. The importance of chemical cleaning before starting up: In chemical processing plants, various raw materials are used during production, along with catalysts. The purity requirements for certain raw materials and catalysts are extremely high; therefore, the cleanliness of the equipment and pipelines used in the production process must also be very high. The presence of any impurities can lead to catalyst poisoning, the occurrence of side reactions, and ultimately the disruption of the entire manufacturing process. Furthermore, certain devices and accessories in the system also require high precision and are highly sensitive to the effects of contaminants. Therefore, any intrusion of impurities is highly likely to degrade the quality of precision components and affect normal production.