The correct selection of the blower and the quality of the installation will have a greater impact on the safety, reliability, reasonable operation and economic benefits of the blower. The following points need to be paid attention to when selecting models.
1. Air volume and pressure. The air volume and air pressure of the blower are two important basic parameters in the selection of the fan. The pressure of the blower depends on the top pressure of the blast furnace. Large-scale blast furnaces will be gradually changed to high-pressure furnace tops, with pressures ranging from 0.1 MPa to 0.25 MPa; it also determines the resistance in the furnace and pipeline loss; the pressure of the blast furnace blower must ensure that the blast furnace situation deteriorates. It can also be operated safely.
Due to the change of climatic conditions and the fluctuation of the process operation itself, the required air volume and pressure also need to be changed accordingly, so that the blower cannot be fixed at one operating point, but in an operating area. When selecting a blower, the operating conditions of the blower should be included in the effective use range of the fan characteristic curve as much as possible.
2. The efficiency of the fan. In the cruel market competition of steel products, all steel companies are seeking measures to reduce production costs. In addition to adopting blast furnace coal injection to reduce the coke ratio, increase the smelting coefficient, and increase production capacity, improving the efficiency of the blast furnace air supply system is also an important measure. one.
The efficiency of the blower determines the economy of the normal operation of the blower. Therefore, a blower with a high rated efficiency and a wide high efficiency area should be selected as much as possible, so that the blower can operate economically for as long as possible throughout the year.
3. Increase the output of the blast furnace when the equipment conditions of the blast furnace have been determined. In order to achieve the goals of high yield, high quality and low consumption in blast furnace production, under the condition that the equipment conditions of the blast furnace have been determined, it is necessary to start with both the blast furnace operation and the quality of raw materials. Blast furnace operation requires blast furnace intensified smelting, and high-pressure operation is a measure of intensified smelting, that is, to increase the top pressure, reduce the pressure difference, and promote the anterograde of the blast furnace. This is a measure to ensure the anterograde of the large blast furnace under high-intensity smelting conditions. Important measures. The high-pressure operation requires the blower to have the pressure to meet the high-pressure operation, and to ensure that sufficient air volume can be supplied to the blast furnace under the high-pressure operation.
