The issue of high specific consumption of circulating water
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Our company has a large volume of circulating water. The specific consumption of circulating water per unit is as follows: the designed value for atmospheric and vacuum distillation is 3.99 t/t, while the actual value during operation is 6.8 t/t； The catalytic design value is 26.3 t/t, while the actual operation value is 45.4 t/t ； The designed value for coking is 5.51 t/t, while the actual value during operation is 12.16 t/t ； The pressure in my recirculating water system is 0.45 MPa; the outlet water temperature is kept below 28 degrees, and the concentration ratio is controlled to be no more than 5 ； May I ask the experts what causes the high specific consumption of circulating water?
The high specific consumption of circulating water is mainly due to the unsoptimized heat exchange processes within various units; the heat that needs to be removed cannot be eliminated, so circulating water has to be used for cooling.