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Treatment of problems in cryogenic storage tank
Date: Dec 24, 2019
Analysis and treatment of cryogenic storage tank problems: the insistence on the vacuum degree of the liquid storage tank interlayer of cryogenic storage tank is not only the guarantee of the thermal insulation function of the tank, but also the fundamental guarantee of the normal operation of the tank. After the tank is put into use, the common problems are often related to the vacuum degree.
1.There is significant large area of "sweating" and "frosting" outside the tank of cryogenic storage tank. It may be caused by leakage of the pipeline in the interlayer of the storage tank, unfilled pearlescent sand or other reasons leading to damage of the vacuum degree of the interlayer. This requires inspection and repair, or leak detection, or make up for pearlescent sand, which can be re vacuumized.
2.The pressure in the tank of cryogenic storage tank rises abnormally, and the safety valve jumps. It may be caused by the following three reasons: (1) the vacuum degree of the storage tank interlayer is damaged; (2) the booster valve in the tank is out of order and needs to be repaired or replaced;(3) the leakage part at the lower part of the interface is at the welding position of stainless steel and carbon steel shell, or the joint position of copper pipe and stainless steel inner cylinder, i.e. the dissimilar welding joint, which mainly constitutes electrochemical corrosion at the dissimilar welding joint 。
3.The evaporation capacity and vacuum degree of the liquid storage tank of the cryogenic storage tank become larger and smaller. It may be the cause of air release of pearlite. Pearlite sand has certain grain size and temperature requirements when filling. When the particle size and temperature of the pearlescent sand are not suitable, after a period of operation, the water vapor will be released from the pearlescent sand, reducing the vacuum degree and increasing the evaporation.
4."Sweating" on the top of the outer cylinder of the cryogenic storage tank. It may be because the pearlite sand is assembled in the lower part. After the cryogenic storage tank is put into operation for a period of time, the pearlite sand sinks, forming space on the top of the tank, part of the insulation effect is significantly reduced, leading to the tank running cold. In this case, if the evaporation is very large, the top of the jacket outer cylinder can be excavated to add pearlescent sand.
Jianshen tank is a company specializing in the production of low temperature storage tanks, oil tanks, LPG tanks and LPG skid mounted storage and transportation equipment. The company is equipped with professional technicians and factories. If you need to purchase, please contact us
1.There is significant large area of "sweating" and "frosting" outside the tank of cryogenic storage tank. It may be caused by leakage of the pipeline in the interlayer of the storage tank, unfilled pearlescent sand or other reasons leading to damage of the vacuum degree of the interlayer. This requires inspection and repair, or leak detection, or make up for pearlescent sand, which can be re vacuumized.
2.The pressure in the tank of cryogenic storage tank rises abnormally, and the safety valve jumps. It may be caused by the following three reasons: (1) the vacuum degree of the storage tank interlayer is damaged; (2) the booster valve in the tank is out of order and needs to be repaired or replaced;(3) the leakage part at the lower part of the interface is at the welding position of stainless steel and carbon steel shell, or the joint position of copper pipe and stainless steel inner cylinder, i.e. the dissimilar welding joint, which mainly constitutes electrochemical corrosion at the dissimilar welding joint 。
4."Sweating" on the top of the outer cylinder of the cryogenic storage tank. It may be because the pearlite sand is assembled in the lower part. After the cryogenic storage tank is put into operation for a period of time, the pearlite sand sinks, forming space on the top of the tank, part of the insulation effect is significantly reduced, leading to the tank running cold. In this case, if the evaporation is very large, the top of the jacket outer cylinder can be excavated to add pearlescent sand.
Jianshen tank is a company specializing in the production of low temperature storage tanks, oil tanks, LPG tanks and LPG skid mounted storage and transportation equipment. The company is equipped with professional technicians and factories. If you need to purchase, please contact us
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