Oil skimmer, also called degreaser, is a kind of oil removal equipment, which is used in machine tool processing, spraying, food processing plants, etc.The dynamic inclined oil skimmer is an important equipment for oil spill mechanical recovery. It is difficult to achieve ideal oil recovery efficiency due to the poor matching of water flow velocity and oil recovery belt velocity during operation.In order to master the oil recovery mechanism and process of the dynamic bevel skimmer and improve the oil recovery rate, a three-dimensional model of the oil recovery process of the dynamic bevel skimmer was established by using the CFX software, and the dimensional analysis and simulation were carried out. The typical oil recovery state was analyzed, and the matching relationship between the water flow rate and the speed of the oil recovery belt was studied.The simulation results show that under the condition of a certain water flow velocity and oil film thickness, different oil recovery belt speeds can cause different oil surface rolling degrees, and the oil surface rolling degree can qualitatively measure the oil recovery state of the oil skimmer, verify the influence of the oil recovery belt speed on the oil recovery state of the oil skimmer, and obtain the matching formula of water flow velocity and oil recovery belt speed,It can provide a basis for improving the oil recovery rate of the oil skimmer.
Oil skimmers, also called degreasers, have many types.Such as weir skimmer, pipe skimmer, disk skimmer, etc.It is widely used in iron and steel plants, machine tool processing, spraying, food processing plants, underground pools, wastewater pools, coolant pools, cleaning pools, auto repair plants, parking lots and other oil leakage treatment, and large equipment can also be used for cleaning oil slicks on the sea.
classification
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Weir oil skimmer: It is based on the principle that oil floats on the water surface due to the different specific gravity of oil and water.Adjust the weir height of the oil skimmer to be just below the oil layer, so that the oil flows into the oil sump and is pumped away, while the water is blocked outside the weir.
Tubular skimmer: It is a device that uses a certain length of annular tube made of lipophilic materials floating on the water surface to absorb oil spilled on the water surface, scrapes the oil absorbed by the annular tube through the scraper device and stores it in the oil sump.
Belt type oil skimmer: refers to a mechanical device that uses the transmission belt to recover oil spilled on the water surface.The operation of the drive belt will stick the spilled oil on the surface of the water, guide the oil into the oil sump through the scraper, and then pump it to the storage device.The oil scraper belt is made of special corrosion-resistant steel and specially designed polymer material, which is wear-resistant and durable.
working principle
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As we all know, oil is non-polar, and water is polar. According to the laws of similar miscible physics, they are immiscible, and the density of oil is less than that of water. Without stirring, oil will float on the surface of water.
The oil scraper uses the specific physical characteristics between oil and water to remove the oil slick on the surface of the night body through continuous working adsorption of the annular steel belt to reduce the pollution of oil to water, which can be used as pretreatment before filtration.
Brush type oil skimmer: refers to a mechanical device that uses a brush to adhere to spilled oil.The spilled oil sticks to the rotating brush and is scraped off and led into the oil sump. The spilled oil is pumped into the storage setting through the pump.
Vacuum skimmer: refers to a device that uses suction pump or vacuum oil storage tank to establish vacuum and recovers oil-water mixture through the pressure difference at the head of the skimmer.
Disc oil skimmer: refers to a disc made of lipophilic materials that rotates in oil-water mixing. When the disc rotates out, the absorbed spilled oil is scraped into the oil sump by the scraper and pumped to the oil spill recovery equipment of the storage device.
Rope skimmer: It is a kind of oil skimmer.It is a device that uses a certain length of annular rope skimmer made of lipophilic materials floating on the water surface to absorb the spilled oil on the water surface, extrudes the oil adsorbed in the rope through the roller extrusion device and stores it in the oil sump.This oil skimmer is mostly used in diving areas, rivers with a lot of garbage and ports.When collecting oil in narrow waters, this oil skimmer is usually fixed on land.
Vortex floating oil collector: generate uniform centrifugal field through fluid pressure to realize fluid centrifugal separation.
main features
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1. Simple structure, ingenious design, convenient installation and operation, and small maintenance.
2. Strong versatility, suitable for indoor/outdoor large and medium-sized sewage treatment tanks, and also suitable for temporary emergency oil removal in some occasions.
3. Standing structure, which can be fixed or mobile.
4. It is equipped with special high temperature and corrosion resistant lipophilic hydrophobic stainless steel ring belt.(It can be used within the range of temperature 120 ℃ and PH value 3-13).
5. Manual/automatic mode, which can automatically stop/start at any time within 24 hours without manual management.
6. Double sided degreasing, degreasing effect.
7. Physical separation, no chemical pollution.
8. The oil scraper steel belt can be configured according to the size of the liquid level to the mounting surface "A"+the support frame "B" provided by the user.
New oil skimmer
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In order to meet the growing demand for oil pollution control equipment, high-speed oil spreaders, and the other is spreaders that can be installed on fishing boats and tugs for work.The high-speed oil spreader initially developed is a combination of a ship with a high operating speed and an effective oil recovery device.With a speed of 21 knots, the 42 foot long ship can quickly arrive at the scene in case of oil spill.This twin hull catamaran has an asymmetric body, and is measured to have a propulsion engine, fuel oil gun and spill recovery storage tank;The engine power is 110-225 horsepower, and the propeller is driven by a V-shaped transmission gearbox. The machine provides hydraulic power for the recovery device.Spill oil recovery adopts D process P device, which uses annular belt to collect the oil on the water surface, and then sends it down to the recovery area, where the oil is separated by the buoyancy of water, and then the oil is pumped to a 3000 US gallon collection tank.Impurities in the oil slick can cause blocking of the metal grille, so the metal grille should be lifted regularly, and the impurities should be cleaned into the container set on the deck. When the spilled oil is sailing, the recovery device set between the hulls can be lifted above the clean water surface.When there is no task of removing oil pollution, the racket can be used as an ordinary work boat or construction ship.The other oil receiver adopts the same DIP recovery device, which is set on a metal support, and the support is equipped with an inflatable floating chamber.A 40 horsepower diesel power unit installed on the work boat provides hydraulic power for the oil return device and pump from a distance for control.Collect the oil around the oil extractor with the oil boom, and control the return through the bracket installed on the ship. The recovery efficiency of the recovery device matches the ship's speed.The recovered oil can be pumped into the container permanently or temporarily arranged on the working boat deck. When the oil receiver is moved, it can be installed in the 20 suctionInternational standard containerPut it on the bank or Shao for future use. The total length is 19.5 pounds and the amount is 4500 pounds.[1]
Mechanical belt skimmer
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The lubricating oil skimmer developed by bAanaki Company can effectively remove contaminated lubricating oil, sludge and impurities in the most harsh environment.The 20cm wide oil scraper belt of the oil skimmer can break the surface tension of water that absorbs oil and impurities.The textured pressure roller pulls the oil skimming belt above the roller and passes through the inclined wiper blade, and the floating oil is discharged from both sides of the oil skimming belt.A heated storage tank keeps dirty oil flowing and flows out through an outlet with an inner diameter of 10cm.The flow of oil skimmer is 606L/h.The oil skimmer is easy to install due to its smooth and compact design.It can be installed on the plane or suspended on any cantilever or support.The removable protective cover makes maintenance and cleaning of the oil skimmer very convenient.The oil skimming belt can be customized to suit different occasions.Ceramic wiper blade andReinforced fibreThe combination of the belt enables the skimmer to handle thicker, viscous liquid hydrocarbons with a temperature up to 150 ℃.A few random accessories are helpful to use when the oil stain is particularly thick.The combined tail pulley or tail impeller can generate enough eddy current to break the oil stain.When the bonded oil dirt is washed away, the dirt will be adsorbed on the oil skimming belt and discharged.When the sump oil cannot be discharged from the storage tank due to the temperature drop, the spiral drain can be used.The customized spiral drain is attached to the discharge pipe of the storage tank to send the oil from the storage tank to the discharge tank.Other accessories include three-phase electric lines, stabilizer bars and conveying packages.The oil skimmer is mainly used in the drainage ditch, underground storage tank, waste water pool and public facilities of metallurgical plants.[2]
Main purpose
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Used in sewage treatment plants, machinery manufacturing plants, steel mills, oil fields, minerals, metal processing industries, parts cleaning machines, heat treatment systems, docks, harbors, hydropower plants, food processing plants, catering, slaughterhouses, parking lots, automobile repair plantsgas stationThe floating oil stain on the surface of the sewage pool of service facilities such as the sewage pool can be removed to ensure the cleanliness of water and avoid polluting the environment, and the recovered floating oil can be recycled.
example
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Application of New Type Inclined Plate Skimmer on Offshore Platform
The research on the settling separation theory of inclined plate skimmer focuses on the coalescence, floating and settling of droplets.Based on this theory, this paper makes a detailed process calculation for the skimming process of the inclined plate skimmer of a project.In addition, according to the characteristics of the project, a detailed summary is made on the selection of the level control method, mechanical structure design and piping design of the inclined plate skimmer. Through such design, the inclined plate skimmer can not only meet the requirements of the platform, but also save costs. It has been successfully applied with good results.
Rotary oil skimmer
Operating principle of rotary table oil skimmer The vertically placed flat disc rotates around the horizontal axis, and part of the disc is immersed in water with oil film floating on the surface.When the disc rotates, the oil adheres to the surface of the disc, and then is scraped off and transported to the oil collection point through the pipe groove.There are many kinds of products adopting the principle of rotary table skimming, with different shapes and sizes.Literature search shows that the typical disc diameter is 280~800 mm, depending on different needs.The larger rotary oil skimmers are mainly used for oil spill removal in open sea areas, while the smaller ones are used in ports and inland waters.Obviously, the oil receiving capacity of the rotary table skimmer depends on the size and number of disks.Taking a typical example, an oil skimmer with 80 discs and a disc diameter of 820mm can collect 400 tons of oil per hour, while 32 discs are installeddisk, disc diameter.[3]
