摘要:
The present invention relates to floating roof storage tanks (1), having a tank shell (2) which is supported on a fixed base (3), and a floating roof (4) supported by the liquid (17) stored in the tank (1). Included in the base (3) or roof (4) is a displacement means (18,51) to substantially displace the stored liquid (17) when the floating roof (4) is in its lowest position. In this way the volume of the heel of liquid (17) unable to be removed from the tank is reduced. The displacement means can take the form of a container (51) which protrudes downwardly from the roof (4), or a layer of ballast on the base (3) of the tank. The ballast layer can be a liquid (18) heavier than the stored liquid (17) which can be retained in a dam (30,40) if desired.
摘要:
The present invention relates to floating roofs for tanks that are used for storage of flammable liquids, such as petroleum or refinery products such as diesel, kerosene, gasoline, etc. In one aspect, the present invention concerns a method for forming a fire retardant coating of a floating roof, and a floating roof obtainable thereby. In another aspect, the present invention relates to improvements in structure of a floating roof. The floating roof tank may be a seamless composite floating roof tank for refineries.
摘要:
A cleaning device (1) for cleaning interior surfaces of containers, such as oil-tanks, the cleaning device comprises: a flushing liquid inlet pipe (3) for the supply of liquid; an extended flushing liquid pipe (4), extending vertically from an upper position of the oil tank and downwardly to the bottom (5) of the oil-tank and being in fluid communication with the flushing liquid inlet pipe (3); a nozzle hub (6) arranged at the distal end of the extended flushing liquid pipe (4), so as to form a fluid connection between the (4) nozzle hub (6) and a nozzle (7); one or more nozzles (7), arranged on the nozzle hub (6), configured for discharging jets of flushing liquids; the cleaning device (1) being arranged between a wall (8) of the oil-tank and a rim seal (10) of a floating roof (9) of the oil-tank.
摘要:
A float (10) floating in a liquid has a spherical body (12) having a spherical shape from which parts are cut off so as to form a regular hexagonal shape when viewed from one direction. In addition, the float (10) is shaped so as to form a regular hexagonal shape when viewed from the above-mentioned one direction, and the floats (10) are arranged in a honeycomb geometry to thereby reduce the contact area between the liquid and air.
摘要:
A floating roof monitoring system (41) and method. One or more sensors can be disposed atop a liquid storage tank (1) having a floating roof (5) covering liquid (4) stored in the liquid storage tank. Each laser sensor (21, 23, 25) measures the distance (9, 11, 13) between the sensor and the floating roof. One or more liquid level gauges (27) can be deployed, which measure a liquid position of the liquid stored in the liquid storage tank. A computing system (10) communicates electronically with the laser sensor(s) and the liquid level gauge(s) to calculate the difference between the liquid position and the distance between the sensor(s) and the floating roof to determine the exact position of the floating roof and activate an alarm or force a process associated with the liquid storage tank to halt.