Cryogenic liquid carbon dioxide storage tank

The error between the liquid level displayed by the pointer differential pressure gauge of the storage tank and the actual liquid level of the storage tank is too large. Solution: open the balance valve of the storage tank → close the gas phase and liquid phase instrument valves of the storage tank at the same time → use an explosion-proof wrench to relieve the pressure in the instrument pipe (if the liquid level gauge is normal, the pointer of the liquid level gauge should be at the 0 scale position) → if the liquid level The pointer of the level gauge is around the 0 scale but not at the position of the 0 scale. At this time, open the glass panel of the liquid level gauge and use a small flat screwdriver to perform mechanical zero adjustment until the pointer returns to zero → use an explosion-proof wrench to restore the previous disassembly position → open the gas phase and liquid phase of the storage tank Instrument valve → close the liquid level gauge flat valve;