In order for the dry gas seal to operate normally, it is necessary to ensure that the gas source entering the sealed chamber is clean and dry. During the compressor shutdown and start-up phase, due to the absence of a high-pressure gas source, the gas in the compressor will leak through the labyrinth seal to the dry gas seal, bringing dirt to the dry gas seal chamber. In the normal operation of the compressor, if the regular cutting of the dry gas filter and the replacement of the filter element can be ensured, the sealing gas can be cleaned; however, if the quality of the labyrinth seal is not good, the impurities in the process gas will be brought into the sealed cavity. Causes damage to the seal.

After the modification of the compressor dry gas sealing air supply system, labyrinth seal and speed increase curve, the dry gas seal operation is good and the force is always constant. The measured value of the orifice plate truly reflects the leakage of the dry gas seal and also avoids The amount of leakage caused by the lubricating oil entering the pressure guiding tube fluctuates.

When the dry gas seal venting system was found, the original empty wire installation position was located on the riser section of the torch vent line in the compressor area. Since the vent line of the compressor area was filled with lubricating oil, a liquid seal was formed in the riser section of the dry gas vent line, making FI325 After B measured the orifice, the pressure increased. In addition, the lubricating oil present in the venting system enters the metering pressure tube through the vent line, causing large fluctuations in the measured value. If the heat-insulating lining insulation fails, serious consequences will result. Therefore, the heat resistance of the material of the pressurized tube is critical. In addition, the construction and installation must strictly implement the construction technical plan, there must be quality assurance measures, and at the same time, a water jacket is installed around the pressure tube for cooling, so that the heat can be taken away when there is a trace of gas.