Automatic control system for pressure of liquid chlorine gasification device

Abstract

The invention relates to the technical field of metallurgical production, and discloses an automatic control system for pressure of a liquid chlorine gasification device. The system comprises the liquid chlorine gasification device, a liquid chlorine conveying pipeline, a chlorine conveying pipeline and a steam conveying pipeline, wherein the liquid chlorine conveying pipeline is provided with a liquid chlorine cut-off valve and a liquid chlorine adjusting valve in sequence; the chlorine conveying pipeline is provided with a chlorine pressure sensor; the steam conveying pipeline is provided with a steam pressure sensor; a pressure signal detected by the chlorine pressure sensor is transmitted to a host; a valve opening control signal is emitted to the liquid chlorine adjusting valve by the host to control the opening of the liquid chlorine adjusting valve; the detected steam pressure signal is transmitted to the host by the steam pressure sensor; a liquid chlorine cut-off valve opening control signal is emitted by the host to control the opening of the liquid chlorine cut-off valve. The system has the chlorine pressure on-line detection and pressure automatic adjustment functions, can realize automatic protection during steam decompression or low voltage of the liquid chlorine gasification device, the input of the liquid chlorine is cut off through one key, and the safety performance of production equipment is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgical production, in particular to an automatic pressure control system of a liquid chlorine gasification device in hydrometallurgical production. Background technique [0002] Chlorine gas pressure control system is a control device used in non-ferrous metal hydrometallurgy process to convert chlorine gas from liquid state to gaseous state after heating. At present, the commonly used ways to control the chlorine gas pressure include manual control, PID regulator control, etc. The manual control method mainly uses the control of the opening of the gaseous chlorine gas valve to realize the control of the chlorine gas pressure. This method has the labor intensity of the operator. The safety is not high, the control accuracy is low, and the control cannot be realized in time when the chlorine gas pressure fluctuates; although the PID regulator control can automatically control the chlorine gas pressu...

AI Technical Summary

Problems solved by technology

At present, the commonly used ways to control the chlorine gas pressure include manual control, PID regulator control, etc. The manual control method mainly uses the control of the opening of the gaseous chlorine gas valve to realize the control of the chlorine gas pressure. This method has the labor intensity of the operator. The safety is not high, the control accuracy is low, and the control cannot be realized in time when the chlorine gas pressure fluctuates; although the PID regulator control can automatically control the chlorine gas pressure, due to the relatively large hysteresis of the system during the control process, the pressure parameters are not easy to adjust , long transition time, low control precision and other technical defects

In the above control method, when the steam loses pressure or has no pressure during the liquid chlorine gasification process, the efficiency and quality of the gasification are not high, and it is easy for liquid chlorine gas to enter the gaseous pipeline, resulting in process instability and equipment damage, as well as personal injury. safety hazards, and the safety performance is not high; when gaseous chlorine leaks and emergency shutdown is required, the control system cannot automatically and quickly cut off, the control is not timely, and there are safety hazards

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