For the plant, which nitrogen capacity is not larger than oxygen capacity, waste nitrogen chilling type pre-cooling system is preferred. Such system is to cool compressed air with dry waste nitrogen. Towers in pre-cooling system are filled with structured packing, which features on little resistance, high efficiency, low power consumption (only with 1 unit of water pump), large feeding capacity and etc. Such pre-cooling system can also wash the process air.
We are the first Chinese supplier who bring such waste nitrogen chilling pre-cooling system into configuration of small air separation plant.