Issues with the EAG heater for LNG tank venting
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I would like to ask everyone: In a project where the natural gas generated by the vaporization of LNG in storage tanks within a factory is used as fuel for boilers, there is 1 LNG storage tank with a capacity of 30 cubic meters, along with 2 vaporizers, each with a capacity of 400 cubic meters (one in use and one as a backup). If an EAG heater is not installed after safe venting of the LNG from the storage tank, is it possible to connect the gas to the backup vaporizer? Thank you!
It mainly depends on whether your EAG can achieve vaporization when it enters the carburetor; if the carburetor is unable to carry out vaporization, the accumulation of EAG at the bottom will have an impact on the carburetor.
If a backup unit is connected, it becomes a Bog gasifier; the original setup of one in use and one as backup no longer exists. The piping also needs to be changed, otherwise the liquid phase and gas phase will share the same pipeline, causing the liquid to flow back.
It is generally not recommended to connect directly to the vaporizer; firstly, EAG involves overpressure discharge, and it is necessary to determine whether your vaporizer and valves can withstand the pressure generated by EAG. The issue of liquid phase backflow should be avoidable; the equipment I built includes a check valve installed after the vaporizer, which effectively prevents liquid phase backflow. The third issue is that the EAG of the storage tank is in a gas-liquid mixed phase; if direct vaporization is possible and the first two problems do not pose any issues for your equipment, then the final problem is that the flow rate will definitely be unstable.
It is generally not recommended to connect directly to the vaporizer; firstly, EAG involves overpressure discharge, and it is necessary to determine whether your vaporizer and valves can withstand the pressure generated by EAG. The issue of liquid phase backflow should be avoidable; the equipment I built includes a check valve installed after the vaporizer, which effectively prevents liquid phase backflow. The third issue is that the EAG of the storage tank is in a gas-liquid mixed phase; if direct vaporization is possible and the first two problems do not pose any issues for your equipment, then the final problem is that the flow rate will definitely be unstable.
Agree with the view on floor 5; EAG is used for safety venting, while BOG can be recycled.
Definitely not, it violates pipeline specifications. EAG is derived from the safety valve; if a backup vaporizer is connected, it is as if the back pressure of the safety valve were the operating pressure of the pipeline, and this pressure increases as the pressure in the storage tank rises, which is equivalent to having no safety valve in place.