Brief Introduction to Flow Balance of Packaging Steel Strip Production Power System

Brief Introduction to Flow Balance of Packaging Steel Strip Production Power System
　　The water used in the hot-rolled steel strip workshop is mainly used for cooling. The cooling methods are divided into two types: direct cooling of cooling rolls or finished products and indirect cooling of cooling heating furnace slide rails and underground oil storage lubricating oil. According to different uses, the cooling water can be recycled water, industrial water, tap water, sea water, etc. Circulating water is to use the used water after coagulation and sedimentation treatment by wastewater treatment equipment. Circulating water cooling is mostly used for the heating furnace, roll, descaling, and output roller table with the largest use, and the circulation rate is generally above 95%. Industrial water has better water quality than circulating water and is used in places with high water quality requirements such as measuring instruments and bearing cooling. Some of the used water enters the circulating water system, and some uses a separate industrial water circulating system. Tap water is used for cooling of measuring instruments and room coolers, but the amount is small. Most of the sea water is used to cool the slide rail of the heating furnace.
　　 In addition, the cooling of the output roller table also adopts the method of using the circulating water treated by the waste water treatment equipment and the untreated water together. Generally speaking, the more new and higher the output of the rolling mill, the more water it consumes. In particular, the increase in cooling water for rolls and output rollers is more significant. The amount of cooling water is generally 20-60 m/ton.
　　 Steam and compressed air are generally supplied by the power center of the steel plant, but some air compressors are also located near the 'users' in the rolling workshop. Steam is used as the heat source of the heavy oil heater, or used for atomization during combustion. Compressed air is used for power sources such as cylinders and valve openings and closings, or cooling of meter and instrument devices. The amount of cooling water is shown in Table 2-48, the actual amount of steam and compressed air is shown in Table 2-49, and the flow balance example of cooling water is shown in Figure 2-63~69.