Oil sludge treatment process and equipment in Xinjiang tank farm

Description :

　　Oil sludge treatment process and equipment in Xinjiang tank farm

　　The production of oily sludge (oil sludge sand): Oily sludge is a solid waste containing oil generated during the processes of oil extraction, transportation, refining, and oily wastewater treatment. It is one of the main sources of pollution in the production process of oilfield enterprises, with a wide variety of types and complex properties. The sludge generated during the crude oil extraction process mainly comes from the surface treatment system, the oily sludge generated during the oil production wastewater treatment process, and the flocs formed by the water purification agent added in the wastewater purification treatment, equipment and pipeline corrosion products and scale, bacteria (corpses), etc., which constitute the sludge. When oil storage tanks in petrochemical enterprises store oil products, small amounts of mechanical impurities, sand particles, soil, heavy metal salts, as well as heavy oil components such as paraffin and asphaltene, deposit at the bottom of the oil tank, forming tank bottom sludge.

　　The hazards of oily sludge (oil sludge sand): Oily sludge contains a large amount of toxic substances such as benzene, phenols, anthracene, pyrene, etc., which have a foul odor. If oily sludge is not treated, it will seriously pollute the soil and environment. On the other hand, if the oily sludge in the sludge is not collected in a timely manner, it will cause waste of resources. Sludge generally has an oil content of 10-50% and a water content of 10-60%. Oily sludge contains abundant crude oil. If crude oil is separated and extracted from it, with a water content of less than 4%, it meets the standards for crude oil recovery and can be recycled by crude oil recovery plants and refineries, achieving economic value.

　　Current status of oily sludge (oil sludge sand) treatment: Oily sludge is generally composed of a stable suspension emulsion system consisting of water in oil (o/w), oil in water (w/o), and suspended solids. The dewatering effect is poor, and the composition and physical properties of the sludge are affected by factors such as sewage quality, treatment process, and dosing agents. Due to the large differences in oil sludge and oil content, the situation of each unit is not uniform, making it difficult to develop standardized equipment and difficult to handle.

　　The treatment process of Ruichen Environmental Protection oily sludge

　　At present, there are various treatment processes for oily sludge in China, among which thermal decomposition treatment and thermal desorption treatment are more commonly used. The thermal analysis treatment scheme for oil sludge adopts a closed high-temperature liquefaction gasification method, which has a relatively high energy consumption, difficult crude oil collection, low treatment efficiency (about 5 tons/hour), and relatively high treatment costs. The oil sludge thermal desorption treatment scheme has low energy consumption, low input, and high efficiency in crude oil recovery and treatment (about 20 tons/hour), making it economically efficient and easy to put into production. Currently, it has become a widely used oil sludge treatment scheme.

　　Ruichen Environmental Protection Company, based on the characteristics of oily sludge and relying on the technical advantages of solid-liquid separation integration solutions, combined with years of experience in the research and application of oilfield solid-liquid separation equipment systems, has launched this economically efficient "oil sludge thermal desorption treatment solution".

　　Step: Use sorting equipment to separate stones, weeds, tree roots, and other debris from oily sludge.

　　Step 2: Use heating tank equipment, mixing equipment, and dosing equipment to fully separate water, oil, sediment, and other substances through water temperature and chemical mixing, taking advantage of the different physical characteristics of oil-water density. The specific gravity of oil is small and attached to the upper layer, followed by the specific gravity of water in the middle layer, and the specific gravity of sediment is large and settles in the bottom layer.

　　Step 3: Utilize three-phase separation equipment, which can also be achieved through oil-water separation equipment and sludge water separation equipment. The purpose is to achieve three-phase separation of water, oil, and sludge, as well as crude oil recovery and water reuse. Mud and water enter the mud and water treatment equipment, and the water can be reused in the heating tank or further processed through the water treatment equipment.

　　Composition of Ruichen Environmental Protection Oil containing Sludge Treatment System

　　Ruichen Environmental Protection has designed and configured a complete integrated oily sludge treatment system based on the "Oil Sludge Thermal Desorption Treatment Plan". It has the characteristics of flexible equipment selection, flexible configuration, low investment, and high output. The Ruichen Environmental Protection oily sludge treatment system consists of oil sludge pretreatment equipment, oil sludge sand screening equipment, dosing system, oil-water separation equipment, sludge water separation equipment and other equipment.

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