極低温貯蔵タンクのためのダブルセットの液体レベルアラームインターロッキングシステム

極低温液体タンク産業分野で広く使用されています。 In order to ensure the safe use of cryogenic storage tanks, nitrogen seals should be set between the inner and outer tank sandwiches of the cryogenic storage tanks to maintain a positive pressure state of the sandwiches to prevent the entry of humid air. In addition to the good thermal insulation properties of chemical products, what safety protection measures need to be equipped in low temperature storage tanks.

たとえば、極低温貯蔵タンク内のタンクには、2セットの液体レベルアラームインターロックシステムを装備する必要があります。 When the cryogenic storage tank liquid level is higher than the set value, the high-level alarm is activated, and when the high-level liquid level is reached, the interlock system is activated.極低温貯蔵タンクの入口パイプのバルブを切り取ります。

極低温貯蔵タンクの液体レベルが設定値よりも低い場合、低レベルのアラームがアクティブになります。 When the low-level liquid level is reached, the interlock system is activated, the valve on the cryogenic storage tank drain pipeline is shut off, and the loading pump is closed. 2セットの圧力監視とアラームインターロックシステムをセットアップします。 When the cryogenic storage tank pressure is higher than the set value, the high-pressure alarm will be activated, the interlocking system will be activated, and the automatic valve on the pipeline of the booster system of theLNGストレージタンク増加を止めるためにシャットダウンされます。プレッシャー。When the cryogenic storage tank pressure is lower than the set value, a low-pressure alarm is activated, and the backflow regulating valve at the outlet of the BOG compressor is opened to ensure that the tank pressure in the cryogenic storage tank does not form a negative pressure. When the minimum pressure is reached, the interlock system is started Open the automatic valve on the pipeline of the cryogenic storage tank pressurization system, and the vaporized part of the cryogenic storage tank pressurizes the inner tank.

Not only that, there is a complete safety system in the cryogenic storage tank, that is, double sets of safety valves and double sets of breathing valves, which are switched by using three-way valves.内部タンクの圧力が25kpaを超えると、安全バルブは圧力を放出し始めます。 When the inner tank pressure is lower than -0.5kPa, the breathing valve opens and air enters the inner tank to ensure that equipment damage and problems are avoided.