VACUUM INSULATED CRYOGENIC TANKS FOR LNG STORAGE

摘要

In summary, the storage tanks receive liquid natural gas from highway transports and store the liquid to give a ready reserve of natural gas. When gas is needed in the distribution main, liquid natural gas will be forced out of the tanks toward the main by a tank pressure, created and/or maintained by a pressure building coil, which is higher than main pressure. On the way to the pipeline, the liquid is evaporated and the resulting gas is warmed. If tank pressure approaches the safety valve setting, a back-pressure regulator will open to allow a small flow of vapor from the top of the tank to a warming coil, and to the main, thus holding tank pressure at a safe level without wasting gas to the atmosphere. This operation will be automatic for all seasons, manually shut off only if a need for maintenance arises.