50 cubic meters dichloromethane storage tank
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I would like to ask the experts here: our company’s tank area plans to install 20 storage tanks with a capacity of 50 cubic meters each, having a diameter of 3.6 meters and a height of 5.4 meters. Floor-standing type without a skirt base. There are two dichloromethane storage tanks, with pointed roofs, nitrogen sealing, and operating at atmospheric pressure; their outer surfaces are equipped with spray systems, while their interiors contain glycol-cooled coil units. Is it necessary to install an ethylene glycol coil inside this storage tank for cooling?
Ask your design institute about this; those who prepared the design drawings for you will know clearly
Our company has dichloromethane storage tanks; we recommend that you apply insulation or cooling measures, with a thickness of 10 cm being sufficient. Spraying coolant gives an unsightly appearance, and with insulation in place, the temperature inside will not rise to 39.8°C even under intense summer sunlight, so there is no need to waste refrigerant salt water
It is recommended to use coil cooling combined with an external insulation layer to maintain the storage temperature of the liquid material at 5–10°C； Dichloromethane has a low boiling point and vaporizes easily, resulting in significant losses at the exhaust outlet. Spraying is not necessary; its effect on dichloromethane is average. Furthermore, since your company is using such a large amount of dichloromethane at once, you could go to the manufacturers of dichloromethane to find out more about it.
It is best to add internal coils for insulation; in Shandong, our tanks only have external insulation without any coils. In summer, for tanks of the same type, the temperature of dichloromethane reaches 32 degrees while that of isobutanol reaches 34 degrees. The reason for this is the volatility of dichloromethane, which causes its temperature to be higher than that of isobutanol.
Although the fire hazard classification of dichloromethane liquid has been changed from \"Class A B\" in the \"Petroleum Chemical Industry Code\" GB 50160-92 (1999 edition) to \"Class C B\" in the GB 50160-2008 edition, considering that dichloromethane is a flammable liquid with a low boiling point, it is recommended to refer to Article 4.2.4 of the \"Design Code for Tank Areas in Petroleum and Chemical Industry Storage and Transportation Systems\" SH/T 3007-2014 when selecting storage tanks.
Dichloromethane has a boiling point above 100 degrees, is explosive – isn’t it classified as Category B?
At room temperature, dichloromethane is not considered a \"flammable\" liquid. In Table 2, which provides examples of the fire hazard classification for flammable liquids in Clause 3.0.2 of the explanatory notes to the \"Code for Fire Protection Design of Petrochemical Enterprises\" GB 50160-2008 (2018 edition), dichloromethane is classified as Category \"C3B\". If the process operating temperature is higher than its boiling point (~40°C), it is upgraded to the “Category B” category in accordance with point 3 of the explanatory provisions of this clause.