Electrolytic tank single-tank overpressure protection device and method

Abstract

The invention relates to an electrolytic tank single-tank overpressure protection device and method. The device comprises a hydrogen evacuation main pipe, a hydrogen dehydrogenation main pipe, a chlorine absorption main pipe, a chlorine dechlorination main pipe, an electrolytic tank, a first automatic control valve, a second automatic control valve, a first pressure gauge, a second pressure gauge,a differential pressure gauge and a DCS control system. The DCS control system is connected with the first pressure gauge, the second pressure gauge, the differential pressure gauge, the first automatic control valve and the second automatic control valve and is used for sending the acquired pressure value of the hydrogen dehydrogenization main pipe and the acquired pressure value of the chlorinedechlorinization main pipe to the differential pressure gauge, and determining and controlling the states of the first automatic control valve and the second automatic control valve according to a result returned by the differential pressure gauge and a preset differential pressure value. The automatic control valves are automatically adjusted according to the pressure difference of hydrogen andchlorine, risks and accidents caused by the too large pressure difference of hydrogen and chlorine of the electrolytic cell are eliminated, and the service life of the ionic membrane is prolonged.

Description

Technical field [0001] The invention relates to the technical field of electrolytic cells, in particular to a single cell overpressure protection device and method for electrolytic cells. Background technique [0002] In the chlor-alkali industry, the pressure difference control method for the overpressure of a single cell in the electrolysis cell is the hydrogen pressure overpressure. Open the single cell hydrogen header hand valve to make the hydrogen go to the venting header; if the chlorine pressure is overpressure, open the single cell chlorine header hand valve to make chlorine Go to the absorption header to ensure the single tank hydrogen and chlorine header pressure. The membrane pole is separated from the ion membrane of the electrolyzer and the anode and cathode. If the pressure or pressure difference is unstable, it may cause damage or even tearing of the ion membrane. Therefore, the traditional single tank overpressure control method mainly has manual manual control ...

AI Technical Summary

Problems solved by technology

The ionic membrane of the electrolytic cell with the membrane electrode distance is attached to the anode and the cathode. If the pressure or pressure difference is unstable, the ionic membrane may be damaged or even torn

Therefore, the traditional single-tank overpressure control method mainly has manual control limited by personnel experience, and the adjustment of differential pressure may not be timely or accurate enough. In addition, manual operation or misoperation by personnel will easily cause large fluctuations in differential pressure. ion membrane damage

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