Air cooler

Nitrogen-water precooler is generally installed in all low-pressure air separation plant. It mainly uses the unsaturation of the water in the nitrogen to make part of the water evaporate. When the water evaporates, it absorbs the latent heat of vaporization to lower the cooling water temperature, and then uses it to cool the processed air to lower the air temperature entering the tower. Therefore, it includes air cooling tower and water cooling tower. The fundamental purpose of setting nitrogen-water precooler is to reduce the temperature of air entering the air separation tower and avoid the sharp fluctuation of the temperature entering the tower. Because the air temperature in the tower directly affects the working condition of switching heat exchanger and distillation column and the economy of the whole air separation plant. When designing, the temperature of air entering the tower is generally set at 30℃. When the inlet temperature of the tower is higher than the design index du...

Liquid air and liquid nitrogen supercooler uses nitrogen as cold source to cool liquid air or liquid nitrogen. There are Pipe type and plate type cooling device. When leakage occurs, it will affect the normal operation of the distillation column. It can be divided into two situations: 1) liquid air and liquid nitrogen leak to the nitrogen side. Since the liquid air leaks to the nitrogen side, it will be further recovered in the heat exchanger, so the increase of cold loss is not obvious, but the temperature at the cold end is Ding. Will drop, the cold end is too cold. If it is liquid leakage, because of the low concentration of nitrogen in liquid, the leak into the gas nitrogen will make the purity of gas nitrogen decline. After the leakage of liquid, the amount of liquid going into the tower will decrease and the recirculation fluid will decrease, which will worsen the rectifying working condition and decrease the oxygen output. In severe cases, the distillation tower will not work...