Shandong Huaxing Petrochemical Group Co., Ltd.

Joint cooling circulating water system for oil refining

The object of technology improvement is the cooling circulating water system with two or three cycles. The two-cycle type is mainly used in the 1,000,000t oil refining catalytic system, including distillation, absorption and stabilization, gas separation, MTBE, etc. Two 250kW and four 710kW cooling pumps (generally 2-3 in service) are used. After system optimization and adjustment, three 710kW pumps are changed into high-efficiency pumps, and the operating mode is unchanged. The three-cycle type is mainly used for heat exchange and cooling of 1,400,000t/a DCC, 80,000t ethylbenzene and styrene device, 6,000,000t raw material pretreatment device, 1,400,000t coking gasoline and diesel hydrogenation device, solvent regenerator, acidic water stripper, etc. Three 710kW (generally 2 in service) and three 1250kW cooling pumps (generally 2-3 in service) are used. After system optimization and adjustment, two 710kW pumps and three 1,250kW pumps are changed into high-efficiency pumps, and the operating mode is unchanged. According to the acceptance results, 12,303,700KWH power can be saved annually by the two-cycle and three-cycle systems.