Crude oil tank is the storage tank where crude oil untreated or unrefined store for temporary basis. It is an important equipment in oil mill machinery and serve an important role. However, crude oil is full of sludge and problem begins when contaminants settle down on the bottom of oil storage tanks. The source of contaminants can come from various sources, and even some of the contaminants are indigenous to the crude oil itself. Sludge is formed when naturally occurring solids as well as rust from piping and tank walls, and higher molecular weight hydrocarbons are separated from lighter hydrocarbons, and sink to storage tank bottoms.
Crude oil storage tank is an important storage device in oil refinery and need to take care of. In most organization, a crude oil storage tank of an oil refinery must be regularly examined every 8-10 years because of danger of oil spills by leaks of the tanks. Also, oil sludge need to be cleaned at regular interval as accumulated sludge can reduce the storage capacity and negatively affecting the total processes. Sludge can result in shortening cleaning cycle period of a heat exchanger and deactivation of a catalyst, and thus minimizes the reducing of throughout attributed to frequent filtering operation in catalyst process.
How To Clean Crude Oil Tank
Said Sludge Treatment is an effective treatment where the accumulated sludge is removed from the tank and also recover the oil from discharge sludge. The sludge is being melt by heating tube or use of steam, and milling and discharging the sludge by ejecting the stream of crude oil under high pressure using a nozzle mounted on the tank. The technique is known as SuperMacs and mainly used in Korea.
Another method for crushing and discharging the sludge through ejection of a crude oil stream under high pressure using a nozzle has been used in Japan and western countries. Crude oil washing treatment is another process when the sludge is crushed by ejecting the oil under high pressure through tens ejection nozzles mounted on the tank roof. In western countries a process by giving high pressure and nozzle to the manhole of the tank and result a positive displacement. There are other various treatment to remove sludge from the tank but the it reduces removal efficiency, washing time and highly expensive.
Types of Crude Oil Storage Tank Roof
The roof construction of oil storage tank is important because it reduces the outflow of oil and restrict the external negative catalysts. The vertical cylindrical storage tanks are full proofed by modernized roof construction for aggressive sulfur containing crude oil and petroleum products. The nature of roof is such so that it can't affect by corrosive elements and other adversaries. The most corrosion resistant tank roofs are those which have supporting structures such as girders, beams, trusses etc. These are arranged outside the tank, while the inside of the roof has a smooth, uniform surface.
