Oil water sand separation horizontal screw centrifuge, oil water sand three-phase separator, spiral sedimentation three-phase horizontal screw centrifuge

Description :

　　Oil water sand separation horizontal screw centrifuge, oil water sand three-phase separator, spiral sedimentation three-phase horizontal screw centrifuge

　　Technical name: Three phase horizontal spiral centrifuge. This series of equipment technology is mainly used in the production of three mixtures of oil-water sludge and oil cement (sand), such as oil field aging sludge treatment, tank sediment, ground mud, drilling mud, etc.

　　Analysis of the practical application of spiral settling three-phase horizontal screw centrifuge:

　　In recent years, with the significant increase in the water content of oilfield produced fluids, there has been a sharp increase in the processing capacity, transportation time, and energy consumption of produced fluids. Dehydration and oil removal are required for the extracted fluid in order to proceed with the next step of processing the crude oil. The use of a three-phase horizontal spiral centrifuge for the three-phase separation of oil, water, and sand in oilfield produced fluids can achieve one-time compliance with wastewater discharge standards while removing harmful solid particles and recovering useful oil phases.

　　Dehydration of oily sludge has long been a common technical challenge for refining and petrochemical enterprises in the treatment of "three sludge". For example, the sewage treated by the sludge dewatering system in Shengli Oilfield in China is generally modified sewage or heavy oil sewage. Due to high oil content and inorganic content in the influent, as well as small density difference between oil and water, the temporarily operated centrifugal dewatering system has poor operational performance.

　　Oil water sand separation horizontal screw centrifuge, oil water sand three-phase separator, spiral sedimentation three-phase horizontal screw centrifuge, application process:

　　Add aged oil demulsifier to the heated aged heavy oil through a dosing pump, and then transport the aged heavy oil with demulsifier added to the aged oil buffer settling tank for about 8 hours of insulation settling. Transport the settled aged heavy oil to a three-phase horizontal spiral centrifuge to separate the oil cement three-phase, where the oil is pumped into a storage tank or directly into the crude oil gathering and transportation system; After the water is pumped up, it goes to the sewage treatment system of the joint station; Oil sludge is regularly transported by truck to the centralized treatment plant. The moisture content has decreased from the initial 45-50% to around 8%. The oil content in the sludge is 20%, and the average oil content in the wastewater is 2623.68ppm. However, the oil content in the sludge and sewage did not meet the national standards.

　　Oil water sand separation horizontal screw centrifuge, oil water sand three-phase separator, spiral sedimentation three-phase horizontal screw centrifuge structure and technical features: (as shown in the figure)

　　1. A three-phase horizontal spiral centrifuge for oil-water sand separation, comprising a rotary drum, a spiral conveyor (2), a large end flange (3), a small end flange (4), a left spiral journal (5), a right spiral journal (6), and a planetary gear differential (7), wherein the rotary drum comprises a column section cylinder (1) and a cone section cylinder (1a), and the liquid pool in the rotary drum along the radial position is light liquid layer oil, heavy liquid layer water, and solid sediment layer sand from inside to outside, characterized in that: 12 vertical plates (8) are welded in a circumferential direction on the wall of the spiral conveyor (2), and the spiral conveyor blades (9) are welded to the vertical plates (9). 8) On the upper part, a material distribution port (16) is set up in the distribution bin of the screw conveyor (2), and an oil baffle (10) is welded to the wall surface at the right end of the column cone junction of the screw conveyor (2); The rotary drum is equipped with an annular guide plate (11) near the large end, and an overflow baffle plate (12) is provided on the outer end surface of the large end flange (3) to control the size of the overflow oil outlet. An annular separator plate (13) is externally mounted on the large end flange (3), which is connected to the large end flange (3) through a pipe flange (14) and screws (15).

　　The three-phase horizontal spiral centrifuge for oil-water sand separation belongs to the field of petroleum exploration and development. The spiral conveyor wall of this horizontal spiral centrifuge is welded with 12 vertical plates in the circumferential direction, and the blades of the spiral conveyor are welded on the vertical plates. The addition of 12 vertical plates reduces the settling distance of oil droplets in the liquid pool, increases the settling time, and is more conducive to the separation of oil and water phases. There is a column cone shaped oil baffle welded on the wall at the right end of the spiral conveyor column cone junction, which can prevent the oil phase from moving towards the sand outlet and reduce the oil content of the sand. A circular guide plate is installed near the large end of the drum, which is more conducive to the separation of oil and water phases and improves oil removal efficiency. An overflow oil baffle is installed on the outer end face of the large flange to control the size of the overflow oil outlet, thereby adjusting the depth of the liquid pool and achieving oil-water separation effect. Practice has proven that the three-phase horizontal spiral centrifuge with this structure has a significant separation effect on oil-water sand.

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• Oil water sand separation horizontal spiral centrifuge