Tangshan Guofeng Iron & Steel Co., Ltd.

Circulating water system of 1250 plate rolling device

The object of technology improvement is the circulating water system of the 1250 plate rolling device of the second hot-rolling workshop. The system is divided into four subsystems: turbid circulating normal-pressure water, flat-flow upper tower cooling water, clean circulating water and air-conditioning cooling water. The turbid circulating normal-pressure water system is mainly used for spraying and cooling of the roller supporting turbid circulating water of the second hot-rolling workshop and the roughly rolled supporting roller, and equipped with three 450kW cooling pumps, two in service and one for standby. The flat-flow upper tower cooling water system is mainly used for filtration and cooling of turbid circulating water of the second hot-rolling workshop, and equipped with six 450kW cooling pumps, three in service and three for standby. The clean circulating water system of the mill is mainly used for cooling of the motor and lubricating oil system, and equipped with three 280kW cooling pumps, two in service and one for standby. The air-conditioning clean circulating cooling water system is mainly used for water-cooling air-conditioning of the power distribution room and control room at the end, and equipped with two 200kW cooling pumps, one in service and one for standby. After system optimization and adjustment, 14 high-efficiency pumps are used in total, and the operating mode is unchanged. According to the acceptance results, 9,120,000KWH power can be saved annually.