High-pressure scale removing water system and control method thereof

Abstract

The invention relates to a high-pressure scale removing water system which comprises an energy-storage tank set. The energy-storage tank set is connected to an injection valve set through a first pipeline, and the injection valve set is connected to a scale removing header through a second pipeline. The high-pressure scale removing water system further comprises a water supply pump set which is connected to the energy-storage tank set and the injection valve set through a third pipeline. The water supply pump set comprises a pump set motor, a speed regulating coupler connected with the pump set motor, a coupler speed regulating oil cylinder connected with the speed regulating coupler, and a water pump, the water pump is connected to the third pipeline, and a PLC is further arranged between the energy-storage tank set and the coupler speed regulating oil cylinder. The energy-storage tank set comprises a high-pressure gas storage tank, and a pressure sensor and a liquid level sensor are arranged on a water storage tank and connected to the PLC. By means of the high-pressure scale removing water system and a control method, the problem of system water pressure large-range fluctuation caused by lagging of the response of the pump set and the delayed supply of water for removing scales can be well solved, and the stable water pressure needed by the scale removing technology is maintained.

Description

technical field [0001] The invention belongs to the technical field of on-line removal of iron scale in the hot rolling process of steel products, and relates to a high-pressure descaling device and method, in particular to a high-pressure descaling water system and its control method, using the high-pressure descaling The water system and control method can not only effectively remove the iron scale in the hot rolling process of steel products, but also control the pressure stability of the descaling water system. Background technique [0002] The hot-rolling and rolling production process of steel requires the use of high-pressure water jetting to remove the oxide scale formed on the surface of the steel during heating and rolling to control the quality of the finished product. The water pressure of the descaling system is a key parameter to ensure the quality of descaling. And with the increase of the strength and performance grade of steel, the demand for descaling wate...

AI Technical Summary

Problems solved by technology

Because the descaling process has obvious characteristics of short-term large water volume, relying on the water level control method of the energy storage tank, its volume setting is relatively large, and there is a large lag between the pumping speed and pressure compared with the system water pressure demand, often resulting in high pressure water. The range of water pressure fluctuations is large due to timely replenishment, especially when the water level is near the lower limit, the remaining water in the tank group is not enough for one descaling water, and it is difficult to maintain the required descaling water pressure, resulting in descaling quality problems

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