Pollution-free oil-containing mud cleaning treatment method and treatment system thereof

Abstract

The invention relates to a pollution-free oily sediment purification treatment method and a treatment system, and the implementation steps are as follows: adopting a mechanical feeding device for conveying oily sediment to a miscellany removing and sorting device, filtering out and removing the miscellanies therein, perfusing hot water and a reagent into the oily sediment; evenly regulating the oily sediment through mechanical rolling; treating oil, water and sediment in an input tank through a cavitation and air flotation three-phase separator, so as to realize the three-phase separation of the oil, the water and the sediment, and discharging most of the separated oil; separating the sediment through a cyclone separator, and discharging net sand; separating slurry through a centrifuge, discharging net mud; separating fine mud from the water through a pressing filter, discharging net fine mud; separating the oil-water through natural ascending and descending, outputting the oil, and continuously heating water for the cyclic utilization; and curling and molding the discharged net sand and net mud according to routine. The invention realizes the resource recovery of crude oil in oily sediment and reduces the cost for purifying and treating oily sediment effectively, and the purified sediment is made into cured resin used for building materials.

Description

technical field [0001] The invention relates to a purification treatment method and system, in particular to a pollution-free oily sediment purification treatment method and treatment system. Background technique [0002] At present, a large amount of oily sludge and sand will be produced in various links of domestic and foreign crude oil development, production, refining, pipeline transportation, and transportation. , sand, and water in a multiphase mixed state, which is a solid waste and cannot be used directly. These wastes cannot be discharged casually, otherwise it will cause serious environmental pollution. Because the oil field produces a large amount of oily sediment all the year round, and its accumulation continues to increase, it has been piled up in the open environment for a long time, which cannot be processed, occupies a large amount of land resources, and causes direct pollution to the environment. The oil and toxic and harmful substances in it are washed aw...

AI Technical Summary

Problems solved by technology

[0004] (1) Clean the silt with hot water, and scrape the floating oil out with an oil scraper, but the silt cleaned by this method still contains more oil, and the water for cleaning and the oily silt will be discharged when they are discharged. will cause secondary pollution

[0005] (2) Mix the oil and sand with hot water and then separate them by cyclone. This method cannot separate the oil from the fine mud, which will cause secondary pollution when the water containing fine mud is discharged.

[0006] (3) After mixing the oil and sand with hot water, the principle of air flotation is used to separate the fine mud, and then the centrifuge is used to separate the fine mud. This method has a long process flow and poor separation effect, and there is also the problem of secondary pollution during the discharge process.

[0007] (4) After mixing the oil and sand with hot water, use the principle of ultrasonic cavitation to separate, and then separate all the solidified matter in a centrifuge. This method cannot separate the mud and sand, so that the solidified matter can only be discharged Pollution treatment is not conducive to the recycling of resources and will increase operating costs

[0008] (5) Heating and coking the oily sediment to above 400°C, performing catalytic cracking and separation, and taking out the oil by distillation. This method has a high working temperature, and there are potential safety hazards in operation, and a large amount of gelled asphalt resin is retained for solidification is still a source of pollution

[0009] (6) The biological separation method is still in the experimental stage, and there are no successful examples of large-scale industrial treatment

[0010] Although the above-mentioned various methods can complete the partial purification of oily sediment to a certain extent, there is a lack of an energy-saving and efficient comprehensive treatment method and system for purification of non-polluting oily sediment. The existing purification methods and devices The low efficiency of purification treatment is common, and it is easy to cause secondary pollution and other problems.

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