Tips for improving the service life of the chemical machinery,during the production process of chemical products, corrosion problems are prone to occur, causing corrosion of chemical production machinery and equipment, seriously affecting the service life of production equipment. If chemical equipment suffers from severe corrosion, it will affect the smooth production of chemical products, and even lead to the scrapping of chemical equipment, greatly reducing the production efficiency of chemical products.
Chemical machinery is an important component of the operation process of the chemical industry, and it can be said that they are the basic conditions for chemical production. Once mechanical equipment undergoes corrosion, it is easy to affect the quality of chemical products. Secondly, corrosion can cause delays in the construction period of equipment, and also bury numerous safety hazards. Therefore, in order to improve the quality of chemical engineering and reduce personnel and property casualties, it is necessary to pay attention to equipment corrosion, Take timely response measures to ultimately assist chemical enterprises in achieving high production and efficiency.
1. Causes of corrosion in chemical production equipment
1.1 Internal reasons
The corrosion resistance of the material itself. The reasonable design and construction of internal components and equipment in chemical production equipment, as well as the corrosion resistance of the raw materials used in the equipment, directly affect the long-term stable operation and production of mechanical equipment. From the perspective of components, the corrosion resistance of components or the anti-corrosion ability of surface coatings directly determine the magnitude of the consequences of corrosion on mechanical equipment damage. The poor anti-corrosion performance of the surface of components leads to a shorter cycle of corrosion, which directly leads to a shorter service life of mechanical equipment. If the design of mechanical equipment is not reasonable, there may be some structural problems inside, such as residual liquid materials and accumulation of solid materials. The long-term concentration of residual chemical products directly leads to equipment corrosion. The selection of raw materials for mechanical equipment is also prone to equipment corrosion, and unreasonable material selection will greatly reduce the operating life of the equipment and affect production.
1.2 External reasons
Due to the differences in production processes and functions, as well as the significant differences in the media in contact with each equipment, the degree of corrosion of the metals used in equipment components can also vary depending on the media in contact. In actual production processes, the media is usually a mixture, and most of the components do not cause corrosion in the production process of the equipment, On the contrary, the corrosive media that can mainly cause corrosion are precisely those trace impurities or corrosive media generated by reactions, which are the fundamental causes of corrosion problems. During the production work of chemical machinery equipment, the corrosive gases and liquids that come into contact with the equipment during the working process can also cause erosion and corrosion of the equipment.
2. Anti-corrosion Measures for Chemical Equipment
2.1 choosing the highly anti-corrosion equipment
The raw materials of mec hanical equipment directly affect the severity of corrosion during operation, as well as the service life of chemical material production machinery. Therefore, when selecting production equipment, it is necessary to have a deep understanding of the raw materials and anti-corrosion level of the equipment. And in actual production, relevant inspections should be carried out on the corrosion resistance of the equipment after it is put into production. Some materials cannot be repaired during use, so regular maintenance and protection of mechanical equipment should be carried out based on actual production conditions to avoid safety issues in mechanical equipment components.
2.2 Chemical and physical anti-corrosion methods
In general, liquid environment and gas environment are the main working environment of chemical production equipment. The corrosion prevention of equipment metal in liquid working environments is the application of electrochemical methods for anti-corrosion work. Electrochemical protection uses chemical machinery equipment as the cathode and inert electrodes as the anode. After connecting these two poles with a DC power supply, the flow of electrons will cause the current of the metal components to disappear, thus playing a preventive role. The cost of physical corrosion protection is much lower compared to chemical corrosion protection and physical corrosion protection for equipment corrosion protection. The main reason is that physical corrosion prevention generally adopts the method of painting and brushing the outer surface of the metal to ensure that the equipment does not come into contact with external media. The other is to coat the equipment with Noble metal to isolate the contact between the equipment and free electrons in the air to prevent ionization. The use of physical anti-corrosion methods is more reasonable and economical, and is also widely used in practical anti-corrosion applications, with immediate results.
2.3 Environmental anti-corrosion
There are two specific aspects to the implementation of environmental anti-corrosion, one of which is to minimize the presence of secondary substances in the environment during the operation of chemical equipment. The second is the addition of preservatives. When using additives, it is necessary to configure the corresponding ratio concentration according to the actual situation. If the concentration is too high, it will directly lead to more severe corrosion of mechanical equipment. If the concentration is too low, it will directly lead to less significant or even no effect. At the same time, attention should also be paid to whether the operation process of the equipment is integrated with the surrounding environment, which constitutes its electrolyte and accelerates the corrosion of the equipment. This requires staff to fully evaluate the surrounding environmental conditions when selecting equipment installation locations.
In summary, it can be seen that the production of chemical products has certain specificity and contains certain risk factors. Therefore, in order to ensure the efficiency and safety of the production process, it is necessary to pay attention to the optimization of efficiency throughout the entire process. The corrosive of chemical machinery equipment is one of the key contents, because reducing corrosive is the key to improving the Factor of safety. This article summarizes the causes of corrosion in chemical machinery and equipment, analyzes the mechanism of corrosion, and proposes certain prevention strategies based on work experience. It is hoped to provide some assistance for the safe operation and corrosion reduction of chemical machinery and equipment.