What should I do if the liquid ammonia storage tank is inaccurate due to high pressure

What should I do if the liquid level of the liquid ammonia storage tank is inaccurate? Which level gauge should be used to measure the liquid level of liquid ammonia storage tank? Liquid ammonia is a common chemical raw material. For the convenience of transportation and storage, liquid ammonia is usually obtained by pressurizing or cooling gaseous ammonia. Liquid ammonia dissolves in water to form ammonium ions NH4+ and hydroxide ions OH-, and the solution is alkaline. Liquid ammonia is mostly stored in pressure-resistant steel cylinders or steel tanks. Liquid ammonia is widely used in industry, is corrosive and easily volatile, so its chemical accident rate is very high. Liquid level gauges commonly used in liquid ammonia storage tanks include magnetic flap liquid level gauges and float type liquid level gauges, both of which are contact measurement methods. Root valves are installed at the gas and liquid liquid level interfaces of the storage tank and then connected to the connector. The liquid level value of the liquid ammonia storage tank is indirectly measured by detecting the liquid level in the communicating device. According to the principle of buoyancy, the float moves up and down with the rise and fall of the liquid level in the measuring tube, and the permanent magnet in the float drives the red , The white flip column is turned 180°, the flip column turns from white to red when the liquid level rises, and from red to white when it falls, so as to realize the liquid level indication of the magnetic flip plate level gauge. The reasons for the fluctuation of the liquid level in the liquid ammonia storage tank are: (1) The liquid level gauge is damaged and failed; (2) The DCS remote signal is wrong; (3) The outlet pipe of the liquid level gauge is blocked; (4) The local temperature of the liquid ammonia storage tank is unbalanced Cause liquid level fluctuation; (5) The liquid level measurement is inaccurate due to the pressure fluctuation of the liquid ammonia storage tank. Traditional contact measuring level gauges are easily damaged due to mechanical parts, and liquid ammonia is a dangerous medium. To replace the level gauge in the middle, it is necessary to clear the tank and reinstall it, and it needs to stop production and stop work, which will cause great safety hazards. and economic losses. The externally attached liquid level gauge is a non-contact liquid level instrument, which can measure the liquid level height in a closed container non-contact. The opening of the measuring container is easy to install, and it can accurately measure the liquid level of various toxic substances, strong acids, strong alkalis and various pure liquids in high temperature and high pressure airtight containers. The liquid level gauge has no special requirements for the material of the liquid medium and the container, and adopts an explosion-proof design to meet the explosion-proof requirements, and can meet the needs of liquid ammonia measurement. It can perfectly solve the problem of inaccurate liquid level measurement in liquid ammonia storage tanks due to excessive pressure.

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