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1. Use suitable coolant
Choosing a coolant with a lower freezing point is the key. Different types of coolants have different freezing points. For example, the common ethylene glycol-water solution can significantly reduce the freezing point when the ethylene glycol concentration reaches a certain proportion. According to the local minimum temperature, select a coolant that meets the antifreeze requirements and ensure that the concentration of the coolant meets the regulations. At the same time, check the concentration and performance of the coolant regularly, because after long-term use, the composition of the coolant may change, affecting its antifreeze effect.
2. Tank insulation
Insulating the storage tank can effectively reduce heat loss. Insulation materials such as polyurethane foam, fiberglass, etc. can be used to wrap the storage tank. These insulation materials have good thermal insulation properties and can prevent the external low temperature from being transmitted to the tank. The thickness of the insulation layer should be determined according to the local climatic conditions and the size of the tank. Generally speaking, a thicker insulation layer is required in cold areas. In addition, ensure that the insulation material is installed tightly without gaps or damage to ensure the insulation effect.
3. Heating device
Installing a heating device in or around the storage tank is an effective antifreeze method. For example, an electric heating cable can be used, which is wrapped around the outer wall of the storage tank and generates heat by powering on to maintain the tank temperature. The power of the electric heating cable should be selected according to the size of the tank and the required heating temperature. In addition, a heating rod can also be installed in the tank, but attention should be paid to the installation position and safe use of the heating rod to avoid accidents such as uneven heating or fire. At the same time, it is equipped with a temperature controller to automatically control the operation of the heating device according to the set temperature to keep the coolant temperature within the appropriate range.
4. Drainage and venting
If the storage tank is not used for a long time during low temperatures, you can consider draining the coolant in the tank to prevent freezing. Before draining the coolant, drain the coolant in the pipes and valves to avoid residual liquid freezing and damaging the equipment. Before reusing the storage tank, it is necessary to check the tank body and pipes to ensure that there is no damage before refilling the coolant.
5. Regular inspection
Regularly check whether the insulation layer, heating device, temperature controller and other equipment of the storage tank are operating normally, and whether the liquid level and temperature of the coolant are within the normal range. Timely discover and deal with problems such as damage to the insulation layer and failure of the heating device to ensure the effectiveness of antifreeze measures. At the same time, pay attention to weather forecasts and take preventive measures in advance before the arrival of extreme low temperature weather, such as strengthening insulation and increasing heating temperature.
