Abstract: Crude oil is discharged from an oil tank. A nozzle is inserted into a support opening formed in advance on a roof of the oil tank. A cleaning liquid containing LCO is injected from the nozzle over the sludge accumulated inside the oil tank after the crude oil is discharged from the oil tank. The cleaning liquid in which the sludge is dissolved is discharged from the oil tank and is returned to the oil tank for recycle cleaning. Subsequently, the cleaning liquid in which the sludge is dissolved is discharged from the oil tank.

Abstract: An unloading device includes: a separator connected to a suction hose connected to the reactor and to another suction hose connected to a vacuum car, the separator separating a catalyst sucked from the reactor by the vacuum car from air; a flexible container bag for storing the catalyst dropped from the separator; and a dumping hose provided between the separator and the flexible container bag for transferring the catalyst dropped from the separator to the flexible container bag. The separator includes a blower unit for blowing a gas to the catalyst unloaded in the separator body toward a lower cone and a cover that openably closes a catalyst outlet.

Abstract: An unloading device includes: a separator connected to a suction hose connected to the reactor and to another suction hose connected to a vacuum car, the separator separating a catalyst sucked from the reactor by the vacuum car from air; a flexible container bag for storing the catalyst dropped from the separator; and a dumping hose provided between the separator and the flexible container bag for transferring the catalyst dropped from the separator to the flexible container bag. The separator includes a blower unit for blowing a gas to the catalyst unloaded in the separator body toward a lower cone and a cover that openably closes a catalyst outlet.

Abstract: A cooling method of a hydrotreating plant having a desulfurization section (1) including a furnace (12) for heating liquid to be processed, reactors (14, 15) for hydrotreating sulfur to generate hydrogen sulfide, a hydrogen sulfide absorber (19) for absorbing the hydrogen sulfide generated in the reactors (14, 15), and a compressor (21) for compressing and transferring fluid from the hydrogen sulfide absorber (19) toward the reactors (14, 15), the cooling method comprising the steps of gradually depressurizing the hydrotreating plant at the desulfurization section (1) to a pressure level at which reactor material does not embrittle and gas does not leak due to difference of mechanical thermal expansion in the plant after stopping supply of the liquid to be processed, operating the compressor (21) approximately at the maximum rotation number, and completely extinguishing burners (12A, 12B) in the furnace (12) during plant shutdown operation.

Abstract: A catalyst dumping device (10) for unloading a catalyst (50) inside a reactor (1), in which smashed used catalyst is thrown into a dumping pipe (11) formed of a plurality of pipe member (12) provided to the reactor (1) to unload to outside of the reactor (1) by fall by dead weight. Accordingly, the catalyst can be unloaded only by throwing the catalyst into the dumping pipe (11), thereby improving work efficiency. Furthermore, no special apparatus such as a vacuum apparatus is unnecessary, thereby reducing cost for the special apparatus.

Abstract: A washing method of petroleum equipment using washing solution capable of being used in a waterless environment is provided. A compound of surface-active agent and oil is used as the washing solution of the petroleum equipment. Content of the surface-active agent in the compound is preferably 1 to 20 volume %. The surface-active agent is preferably selected from the group consisting of anionic surface-active agent, cationic surface-active agent, amphoteric surface-active agent and nonionic surface-active agent. The oil is preferably at least one selected from the group consisting of kerosene, light gas oil, vacuum gas oil and light cycle oil fraction obtained from a fluid catalystic cracking unit.

Abstract: A washing method of petroleum equipment using washing solution capable of being used in a waterless environment is provided. A compound of surface-active agent and oil is used as the washing solution of the petroleum equipment. Content of the surface-active agent in the compound is preferably 1 to 20 volume %. The surface-active agent is preferably selected from the group consisting of anionic surface-active agent, cationic surface-active agent, amphoteric surface-active agent and nonionic surface-active agent. The oil is preferably at least one selected from the group consisting of kerosene, light gas oil, vacuum gas oil and light cycle oil fraction obtained from a fluid catalystic cracking unit.

Abstract: A repairing method of a petroleum refining plant for efficiently conducting cleaning process of process equipment and pipings, unloading process of agglomerated catalyst, rinsing work of the process equipment and the pipings, thereby reducing plant shutdown time, preventing stress-corrosion cracking by polythionic acid, improving production efficiency, ensuring work safety and reducing production cost, is provided. For the object, the repairing method of the petroleum refining plant of the present invention has a first step of cleaning the process equipment and the pipings and softening agglomerated catalyst inside the process equipment, second step of rinsing the process equipment and the pipings and coating a surface of the softened catalyst by a coating agent, and third step of dumping the coated catalyst from the process equipment and re-rinsing the process equipment and the pipings.

Abstract: A catalyst dumping device (10) for unloading a catalyst (50) inside a reactor (1), in which smashed used catalyst is thrown into a dumping pipe (11) formed of a plurality of pipe member (12) provided to the reactor (1) to unload to outside of the reactor (1) by fall by dead weight. Accordingly, the catalyst can be unloaded only by throwing the catalyst into the dumping pipe (11), thereby improving work efficiency. Furthermore, no special apparatus such as a vacuum apparatus is unnecessary, thereby reducing cost for the special apparatus.

Abstract: A catalyst dumping device (10) for unloading a catalyst (50) inside a reactor (1), in which smashed used catalyst is thrown into a dumping pipe (11) formed of a plurality of pipe member (12) provided to the reactor (1) to unload to outside of the reactor (1) by fall by dead weight. Accordingly, the catalyst can be unloaded only by throwing the catalyst into the dumping pipe (11), thereby improving work efficiency. Furthermore, no special apparatus such as a vacuum apparatus is unnecessary, thereby reducing cost for the special apparatus.

Abstract: In a hydrogen treating plant which includes a recycle gas line having a reactor for regenerating a hydrogen sulfide by hydrogenating sulfur and an H2S absorber for absorbing the hydrogen sulfide generated in the reactor, and includes the liquid cyclic line circulating liquid for absorbing the hydrogen sulfide in the H2S absorber therein, a refrigerant unit provided in the liquid cyclic line which is lower temperature and lower pressure relative to the recycle gas line.

Abstract: The first step, wherein a catalyst is built up in predetermined positions by a catalyst loading means disposed inside a reactor to form said plurality of built-up sections only by said predetermined height, and the second step, wherein the position or direction for releasing the catalyst of said loading means is changed in accordance with the height of the charged catalyst, are alternately repeated to fill said reactor with a predetermined quantity of said catalyst.

Abstract: The present invention relates to a method of unloading a catalyst from a reactor wherein the reactor is filled with mixed liquid of condensed ring aromatic hydrocarbon having a required number of ring members, i.e. preferably 2 to 4 ring members, and gas oil, to wet the catalyst so as to form a coating of film on the catalyst before unloading the catalyst from the reactor.