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Machine centrifugal extraction solvent extraction from the oil field oil sludge oil extraction technology was studied

by:Deyuan      2020-09-01
Oily sludge is mainly produced in the process of the oil extraction, oil gathering and transferring process, refinery sewage treatment, oil depot and gas stations, large steel continuous casting/tandem turbid circulating wastewater treatment and other industries. Its physical and chemical properties is complex, generally contains a lot of aging oil, wax and asphaltene, colloid and suspended solids, bacteria, parasites, salts, acid gases, corrosion products and a small amount of mechanical impurities, copper, zinc, chromium, mercury and other heavy metal salts, etc. , at the same time also contains benzene, phenol, anthracene, pyrene, etc have a stench of toxic substances. Also joined in the process of oilfield production lots of coagulating agent, corrosion inhibitor, scale inhibitor, bactericide, such as water treatment agent, polymer eor oily sludge oil also weak acid cryogenic adhesive agent and polyacrylamide sulfides and very difficult to separate and processing. In oily sludge, high content of petroleum material, metal and inorganic mineral, has the very important oil and gas recovery and metal material recycling value, so the oil sludge is a kind of resources.
the world common methods of dealing with oily sludge can be divided into biodegradation method, analytical method, the hot washing method, solvent extraction, and curing incineration method, etc. , and usually on sludge pretreatment, with convenient transportation, tempering technology and ultrasonic technology can achieve the effect.
conditioning technology of sludge pretreatment, has been quite mature abroad, the technological process is using chemical demulsifier destroying the structure of oily sludge particles, so as to destroy the stability of the colloid � �, thus improving the sludge dehydration nature, using the centrifuge three-phase separation of sludge oil, water, mud, so can make recovery more than 90% of crude oil processing.
machine centrifugal extraction solvent extraction from oil field oil sludge oil extraction in the extraction process is the use of chemical solvent extraction separation of the sludge recycle oil, after the separation of the oil from the oil sludge extracted for recycle, through methods such as reverse extraction to separate from the mixture solvent recycle. Main process is: put sludge in oil pool, after a period of time after the separation, to join the extraction agent, through distillation kettle distillation, and smoke filter for filtering, liquid fluid entering. cwl - such as oil and water M type centrifugal extraction machine, and put it on extraction of oil separation ( The recovery rate of up to 99. 4%) , at the same time, extraction solvent recycle. Its advantage is oil, water, mud can be used effectively, and used in the extraction solvent chemical stability, can be recycled.
machine centrifugal extraction solvent extraction from the characteristics of oil extraction in the oil field oil sludge:
(1) to adapt to the strong performance - — Compared with the traditional van and extraction tower equipment, under the effect of centrifugal force, the remaining time is short, split phase quickly, to adapt to the wide range of flow ratio, and processing power; By changing the weir plate and frequency control of motor speed can meet the different density and viscosity of liquid materials;
2 material stock of small - — Two-phase material stock in the equipment is small, short contact time, more suitable for processing because of long time volatile activity and variability of materials such as antibiotics, etc. , of course, individual system needs two phase together contact time long also can operate separately.
(3) high extraction efficiency - — Phase equilibrium set up fast, easy to implement series single stage or multistage counter-current or wrong washing and extraction, high mass transfer efficiency and grade efficiency approaching 100%, stop not to undermine the established after concentration distribution at different levels, can at any time at all levels of sampling, facilitate testing.
(4) to take up the space is little, — Motor direct drive, no transmission attachments, compact structure, save area and operating space, less auxiliary equipment.
5] adaptable - — Not because of the change of the material influence extraction effect, can deal with small difference in density between the viscosity of the system, and has a strong ability of demulsification.
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