A two-stage skid-mounted separation device for continuous extraction of oil-based components in oily solid waste using supercritical carbon dioxide
A technology for solid waste and carbon dioxide, which is used in solid waste removal, separation methods, solvent extraction, etc., can solve the problems of discontinuous treatment methods, many equipment, unfavorable prying, etc., to ensure mobile treatment while drilling and simplify operations. Process and the effect of saving equipment space
Active Publication Date: 2021-11-02
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0003] Among the currently disclosed supercritical carbon dioxide extraction devices, some devices (CN104724894A, CN107913527A, CN104946291A) can realize intermittent treatment of oily solid waste, but cannot realize multi-stage and continuous extraction of oily solid waste by supercritical carbon dioxide, and intermittent The traditional treatment process is not conducive to prying due to the large number of equipment and discontinuous treatment methods, resulting in an increase in the cost of oily solid waste treatment in remote oil and gas stations due to the increase in transportation costs
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[0022] The first step: open the third valve 10, the fourth valve 11, close the second valve 7, the seventh valve 38, and the eighth valve 39;
[0023] The second step: open the pressure reducing valve 8, the gas mass flow controller 4, the first gas compressor 5, and the first heat exchanger 6, pressurize and heat up the carbon dioxide gas to a supercritical state and inject it into the system, and pass the first pressure Table 1 monitors the pressure change situation of the carbon dioxide injected into the system;
[0024] Step 3: after the supercritical carbon dioxide is injected into the system, turn on the electric mixer 23 to stir the oily solid waste into uniform solid phase particles;
[0025] The fourth step: open the third heat exchanger 34, adjust to the required temperature, open the booster pump to inject the pressurized and heated oily solid waste into the tubular supercritical extraction reactor 24 and combine it with the supercritical extraction system provided ...
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The invention provides a two-stage skid-mounted separation device for continuously extracting oil-based components in oily solid waste by using supercritical carbon dioxide. The device consists of a valve, a booster pump, a gas compressor, a heat exchanger, a pressure gauge, a gas cylinder, Tank, electric mixer, tubular supercritical extraction reactor, primary cyclone separation extraction reactor, secondary separation extraction reactor, supercritical fluid separation kettle and other equipment; the device is divided into supercritical carbon dioxide supply system, oily solid waste Material supply system, temperature control and pressure control system, oil-based extraction system and reflux system. The device can switch the primary and secondary extraction processes according to the oil content of solid waste, realize the secondary and continuous extraction of oil base in solid waste and reduce the processing cost, and realize the mobile treatment while drilling of oily solid waste in the petrochemical industry. It has the advantages of high degree of automation, easy prying and convenient operation.
Description
technical field [0001] The invention relates to a two-stage skid-mounted separation device for continuously extracting oil-based components in oil-containing solid waste by using supercritical carbon dioxide, and relates to the field of treatment and resource utilization of oil-containing solid waste in the petrochemical industry. Background technique [0002] According to statistics, my country's petrochemical industry produces an average of about 800,000 tons of oily solid waste every year. The content of oil base in these solid wastes is usually between 10% and 50%, and has the characteristics of sufficient emulsification, high viscosity, and high treatment cost. If these oily solid wastes are discharged directly without treatment, it will not only occupy a large amount of cultivated land, but also cause serious pollution to soil, water and air. If the oil base in oily solid waste is recycled and reused, there is a huge economic potential. At this stage, the oily solid ...
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IPC IPC(8): B01D11/02B09B3/00
CPCB01D11/0203B01D11/0284B01D2011/007B09B3/80
Inventor 贾文龙宋硕硕李长俊吴瑕杨帆宋晓琴
Owner SOUTHWEST PETROLEUM UNIV