What is the sequence for initially cooling the cryogenic tank and adding refrigerant?
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What is the sequence for initially cooling the cryogenic tank and adding refrigerant?
The general principle for adding refrigerant is to start with the heavier parts first, and in small amounts multiple times. If a large amount of N2 or ethylene is added from the start, the pressure will rise rapidly; as a result, when the system is put into operation, there will be a severe imbalance in the temperature of the cold box, preventing the temperatures in the middle and upper sections from being maintained at the desired levels, and the liquid level in the refrigerant separator tank cannot be kept stable.
I’ll take a look at your compressor; if it’s a fixed-frequency type with a limited range of load adjustment, then use ethylene, methane, and nitrogen in larger quantities, along with a small amount of propane. After startup, a light mixture is used primarily to increase pressure and flow rate, ensuring the proper operation of the compressor. Thereafter, propane and butane are gradually added to increase the cooling rate. The frequency conversion is easy to explain, but the principle remains the same; the addition of recomponents can be done earlier.
What determines the light and heavy components? What are the heavy components?
What determines this light Reorganization component?