Oil soil treatment technique for tank cleaning

Abstract

The invention discloses a disposing craft of tank-cleaning oil sludge, which comprises the following steps: putting tank-cleaning oil sludge into one and two grade homogeneous machine; adding into extracting agent at finite ratio; heating; stirring; proceeding once and twice solid-liquid separation in centrifuge; leading into water-oil separating tank; proceeding settling segregation; separating out of oil, wastewater and sand; proceeding continuous extraction; handling; discharging; burning; biological degrading; or using as process-type adhesive.

Description

Technical field: [0001] The invention relates to a process technology for treating oil sludge in oil field tank cleaning, and belongs to the technical field of oil field pollution control and environmental protection. Background technique: [0002] Oil tanks are important equipment for storing crude oil in oil fields and oil gathering and transportation systems. Due to the deposition of solid particles such as mud and sand during their operation, oil sludge will gradually form over time, which will affect the normal operation of the entire gathering and transportation system. Therefore, it must be regularly Clear the tank and deal with the removed sludge. [0003] At present, domestic and foreign attach great importance to the research of biological treatment and disposal technology and high temperature treatment technology of oily sludge. In terms of oily sludge disposal, professional environmental protection companies in foreign countries are usually responsible for the t...

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Problems solved by technology

The technologies currently used in China mainly include incineration method, separation method and biodegradation method. The incineration method is to build special incineration equipment and use diesel oil to incinerate oil sludge sand. This method requires high equipment investment and high operating costs, which will cause energy waste. Although The treatment is relatively thorough, but the practical application is very difficult; the separation method uses physical or chemical methods to separate the oil and mud sand in the oil sludge sand. This method can recycle the oil in the oil sludge sand, but the cost is high, and the separation The silt still contains a certain amount of petroleum substances, and it will cause environmental pollution if it is directly discharged into the environment. Therefore, the silt separated by this method still needs to be treated by incineration, storage or burial; biodegradation refers to the use of microorganisms The cost of decomposing the oily substances contained in the oil sludge sand is high, the technology is not very mature, and the contained oily substances cannot be effectively utilized

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