If the upper and lower correction irons outside the shell of the fractionator are broken or lost during transportation, the pearlite in the fractionator shall be unloaded, a vertical line shall be hung from the top of the upper tower to the condensing evaporator, and the distance between the vertical line and the tower body shall be measured from the top, middle and bottom, and the verticality deviation shall not be greater than 1 / 1000. Every 90 degrees, the measured values should be basically consistent. If not, the bottom of fractionator can be adjusted by adding pad iron to make it meet the requirements.DEAR Air separation equipment.Abnormal operation of molecular sieve purification system will shorten the operation cycle of the device. It is mainly caused by the following reasons: short circuit of molecular sieve adsorber bed. In the process of start-up, due to unstable air velocity control or too large pressure difference between the two tanks during switching, the bed will be impacted, resulting in uneven molecular sieve bed and short circuit of bed.
DEAR Air separation equipment.From the operation point of view, electric heating will not affect the regeneration of adsorber due to steam leakage, so the equipment cost is low. Whether steam or electric heating is used for regeneration of Molecular Sieve Purifier depends on equipment capacity and plant conditions. Generally, if the capacity of equipment is large and the factory has sufficient steam source, steam heating is often used;DEAR Air separation equipment.For the pipeline with pressure, the most common problem in the production process is the leakage at the joint flange. Once leakage is found, do not tighten the bolts under pressure. Because there are some reasons for the leakage during operation, such as gasket damage, pipe thermal stress, etc.DEAR Air separation equipment.For switching heat exchanger, one of the reasons for the expansion of temperature difference at the hot end is that there is too much cooling capacity of the backflow gas. For example, if the circulating gas volume or intermediate pumping volume is too large, the cooling capacity can not be fully recovered in the heat exchanger, the temperature of the backflow gas out of the heat exchanger will decrease, and the temperature difference at the hot end will expand. At this time, the circulation or pumping volume should be adjusted properly.
DEAR Air separation equipment.The oxygen flow rate in the oxygen pipeline shall be in accordance with the provisions of code for design of oxygen station (GB 50030-91): when the pressure is greater than 10MPa, the oxygen flow rate shall be less than 6m / S; when the pressure is between 3Mpa and 10MPa, the oxygen flow rate shall not be greater than 10m / S; when the pressure is between 0.1MPa and 3Mpa or less, the oxygen flow rate shall not be greater than 15m / S; when the pressure is between 3Mpa and 3Mpa, the oxygen flow rate shall not be greater than;DEAR Air separation equipment.Plate fin type is widely used in various air separation plants, mainly used in medium and large air separation plants. It is the condensation and evaporation of gaseous nitrogen and liquid oxygen in the adjacent channels. The adjustment of their heat load should be carried out according to their different working principles.DEAR Air separation equipment.When the upper tower surface pressure exceeds 0.06mpa, but the upper tower safety valve does not act or cannot be eliminated after the safety valve jumps open, the upper tower emergency vent valve shall be opened quickly, and the oxygen and nitrogen delivery valve shall be opened. If the above measures are taken, the upper tower pressure can not be reduced.
