PURPOSE: To detect the gas leak from an inner tank at an early stage and to detect the leaking point, by partitioning at least one part of the outer surface of the inner tank, and providing a gas-leak-detecting sampling means for every cell covered by a film.
CONSTITUTION: Cells are formed in the roof part and the side plate part of an inner tank 1. A film 2 is provided in each cell so as to cover the cell wall. The outside of the film is contacted with the outer surface of the inner tank 1. A gas-leak-detecting sampling device 3 is provided between the outer surface of the inner tank and the film 2 in each cell. The part between the film 2 and an outer tank 4 is filled with pearlite 5. Nitrogen gas between the outer surface of the inner tank and the film 2 in each cell is sucked to a gas-leak detecting instrumentation by a pump, which is connected to the gas sampling device 3. Nitrogen gas is introduced into the space from a nitrogen feeding pipe and made to of flow through the space. When stored low-temperature liquid gas leaks from the inner tank, the gas is mixed into the flowing nitrogen gas. The gas is sampled and detected by the gas-leak detecting instrumentation.
KAIHOU KATSUHARU
MASAGO MASAKAZU
TODA HISASHI
KOKUBU YUUICHI
| JPS5418404A | 1979-02-10 |
Next Patent: GAS LEAKAGE DETECTING APPARATUS OF GAS STORAGE TANK