초록 ▼

A method of leakage testing a volatile liquid tank farm together with a vapour recovery system, to collect vapour from the tanks at the time of re-filling them with volatile liquid. The tank farm has individual fill-pipes (13) for each tank (10) with each fill-pipe outlet below the normal minimum li

A method of leakage testing a volatile liquid tank farm together with a vapour recovery system, to collect vapour from the tanks at the time of re-filling them with volatile liquid. The tank farm has individual fill-pipes (13) for each tank (10) with each fill-pipe outlet below the normal minimum liquid level in the tank and each tank having a vent-pipe (11) connected to a common manifold (25). To perform the test, the common manifold is closed to atmosphere and one side of a shut-off valve (17) is connected to the manifold (25), a flow meter (20) being connected to the other side of the shut-off valve. Flow meters (22, 23) are coupled to all but one of the fill-pipes (13), the shut-off valve (17) is opened to allow volatile liquid to be supplied to the remaining fill-pipe so as to increase the volume of volatile liquid in the associated tank, and the out-flow of gas or wet vapour from the common manifold (25) is monitored via the flowmeters (20, 22, 23) for substantial correlation to the volume of volatile liquid admitted into the tank associated with the remaining fill-pipe. The method can be modified also to allow the testing of individual tanks of a tank farm, where the vent pipes of the tanks individually vent to atmosphere, with the leakage test or vapour recovery system test then being performed one at time, on each of the individual tank(s).

대표청구항 ▼

A method of leakage testing a volatile liquid tank farm together with a vapour recovery system, to collect vapour from the tanks at the time of re-filling them with volatile liquid. The tank farm has individual fill-pipes (13) for each tank (10) with each fill-pipe outlet below the normal minimum li

A method of leakage testing a volatile liquid tank farm together with a vapour recovery system, to collect vapour from the tanks at the time of re-filling them with volatile liquid. The tank farm has individual fill-pipes (13) for each tank (10) with each fill-pipe outlet below the normal minimum liquid level in the tank and each tank having a vent-pipe (11) connected to a common manifold (25). To perform the test, the common manifold is closed to atmosphere and one side of a shut-off valve (17) is connected to the manifold (25), a flow meter (20) being connected to the other side of the shut-off valve. Flow meters (22, 23) are coupled to all but one of the fill-pipes (13), the shut-off valve (17) is opened to allow volatile liquid to be supplied to the remaining fill-pipe so as to increase the volume of volatile liquid in the associated tank, and the out-flow of gas or wet vapour from the common manifold (25) is monitored via the flowmeters (20, 22, 23) for substantial correlation to the volume of volatile liquid admitted into the tank associated with the remaining fill-pipe. The method can be modified also to allow the testing of individual tanks of a tank farm, where the vent pipes of the tanks individually vent to atmosphere, with the leakage test or vapour recovery system test then being performed one at time, on each of the individual tank(s). ertically inclined path of travel for the bags of potatoes, the chute having an open upper end located at the elevated position configured for receiving the bags of potatoes from the conveyor, and an opposite lower end disposed at a lower elevation than the upper end; and a plurality of flaps pivotally coupled to the chute at spaced apart locations along the length of the chute defining a plurality of sequential vertical stops and dividing the chute into a plurality of individual compartments sized to receive at least one of the bags of potatoes, each of the plurality of flaps pivoting between (i) a first stop position in which the flaps extend transversely to the chute and into the path of travel of the bags of potatoes to stop the bags of potatoes from continued travel along the chute, and (ii) a second pass position in which the flaps extend generally parallel to the chute and the path of travel of the bags of potatoes to allow the bags of potatoes to continue traveling along the chute, the plurality of flaps sequentially pivoting in order from the upper end to the lower end of the chute from the first stop position to the second pass position, each flap pivoting from the first stop position to the second pass position after receiving at least one of the bags of potatoes to lower the bags of potatoes to the next lower flap, such that the bags of potatoes are sequentially lowered from one flap to another; and the plurality of flaps including a first upper flap located closer to the upper end of the chute th