In winter, how do chemical plants prevent freezing and condensation? I’ll tell you

Thread Content

As winter sets in and temperatures drop sharply, making the weather increasingly cold, many chemical plants begin to experience equipment damage, leaks, and freezing cracks. This is especially true in the northern regions with low temperatures; therefore, winter anti-freezing measures are very important. The anti-freezing and anti-condensation measures in chemical enterprises during winter involve two aspects: anti-freezing process management and equipment management. Anti-freezing process management primarily refers to the recording of various operating parameters of the equipment used in the anti-freezing process. This task may seem simple, but it is still very important and crucial for the entire chemical industry: https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/a266ae594e5746d382d6692e830246da~noop.image?_iz=58558&from=article.pc_detail&x-expires=1671412270&x-signature=P6xHfLnnGECHmtLHquiO0QL1aJE%3D. First, it involves recording the operating parameters of equipment used for freeze prevention and anti-condensation purposes, thereby providing a reliable basis for developing scientific measures to prevent freezing and condensation. Pipelines for transporting low-temperature media generally carry air, nitrogen, steam, and other media with relatively low temperatures. For pipes handling corrosive media, insulation measures are generally also employed. For cooling water pipes, insulation measures must also be taken due to the large temperature fluctuations of the cooling water. For equipment pipelines containing coagulants or surfactants, cleaning and anti-corrosion measures are usually also required. For high-temperature equipment, there are many cases in which anti-freezing and anti-condensation measures cannot be applied, such as high-temperature containers, which need to be heated. If the device operates in a low-temperature environment where the temperature is too low for it to function properly, this can easily lead to damage to the device ； If the temperature is too high and it cannot operate properly, it is likely to lead to an explosion ； If moisture and impurities enter the equipment, it can easily lead to problems such as pipeline rupture, corrosion, and scaling. Therefore, for equipment and facilities at risk of freezing or condensation issues, it is essential to develop anti-freezing and anti-condensation strategies during the design phase, and relevant data on freezing and condensation should also be recorded and analyzed as part of regular maintenance. II. During the anti-freezing and anti-condensation period, replace leaking equipment or pipes promptly to ensure the complete reliability of system operation. In areas such as the absorber towers and the tops of distillation towers for easily condensable gases, timely cleaning should be carried out during freezing and condensation prevention periods to ensure the proper operation of the system. If freezing occurs, production must be stopped immediately, appropriate measures taken to prevent the situation from worsening, and the relevant authorities must be notified promptly for handling. 1. Clean the scale and debris accumulated in the cooling water pipes in a timely manner ； 2. Inspect all storage tanks for any leaks ； Add water appropriately according to the on-site conditions ； 3. Strengthen the inspection and maintenance of various valves to prevent production accidents caused by freezing damage ； 4. Strengthen the insulation of equipment, especially to prevent pipes, pumps (magnetic pumps, chemical shielded pumps, chemical centrifugal pumps, etc.) and valves from freezing due to low temperatures. https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/929a5142535240219e3310cbb839b272~noop.image?_iz=58558&from=article.pc_detail&x-expires=1671412270&x-signature=B2rpCiLNwRH3gwawJJnbYTTSj%2Fo%3D Third, depending on the actual circumstances, insulation measures should be taken for equipment that does not require heating, in order to prevent damage due to freezing and resulting accidents. The various types of equipment used in chemical enterprises suffer from complex operating conditions, are prone to damage and wear, and have strict technical requirements; especially during winter, this makes it easy for such equipment to get damaged ； Therefore, chemical enterprises should formulate anti-freezing measures based on the actual situation. Appropriate anti-freezing measures must be taken for equipment that is prone to corrosion, flammability, explosiveness, and toxicity. The various workshops in chemical enterprises should also carry out anti-freezing and anti-condensation measures in a targeted manner based on their own conditions. For example, in the raw material processing area, care must be taken to prevent moisture in the air from entering the raw material system ； The material flowing between the towers must be sealed using packing or valves to prevent leakage ； Large-scale equipment such as reaction vessels should be equipped with insulation measures to prevent external heat from entering the equipment ； Each process unit also needs to closely monitor various production stages in order to ensure the device operates properly during winter. As an important device for transporting fluids in chemical plants, chemical pumps require proper insulation during winter, as advised by Richter; this is necessary to ensure the normal operation of the equipment and to enable it to perform at its best.