Annual operation plan of process refrigeration (antifreeze in winter)
For refrigeration equipment installed outdoors or without heating, three methods are usually used to prevent freezing in winter:
1: Drainage and antifreeze: After the equipment is shut down, drain the ordinary circulating water of the water system through the lowest drain of the equipment, and confirm that there is no accumulation of water in the expansion tank, evaporator, circulating water pump, and low position of the system pipeline to prevent the equipment. Frost damage. Key point: Drainage must be clean and thorough. Disadvantages: This method is only suitable for users who do not operate in winter or rarely switch between start and stop.
2: Circulation antifreeze: The circulating pump in the equipment runs continuously, and the water system keeps circulating, which can also avoid freezing and ice blocking caused by low ambient temperature. The key point: the water system insulation is as complete as possible; strictly prevent power outages and shutdowns. Disadvantages: This method is suitable for the user's needs for uninterrupted continuous production in winter, and requires personnel to be on duty to ensure no shutdown. In addition, energy consumption is also a drawback.
3. Add antifreeze: According to the lowest operating environment temperature, add antifreeze with a safe freezing point to prevent freezing and blocking of the equipment water system. Key point: Choose high-quality antifreeze. 1: The freezing point is stable to prevent freezing; 2: the antifreeze will not corrode and will not cause damage to the equipment system; 3: long-term antifreeze, with a service life of 3-5 years, reducing use costs.