SU1761184A2 - Device for cleaning oil-containing waters - Google Patents

Abstract

SUMMARY OF THE INVENTION: The invention relates to a technique for treating oil-containing water and can be used for treating oil-containing water on ships, as well as in wastewater treatment on drilling platforms, oil refining enterprises and other facilities where waste water containing oil products is formed. Inside the central tube of the purification unit, consisting of a frame with a coalescing material, there is a tight fitting insert of hydrophilic material. The cleaning capacity compared with the device according to the basic invention can be increased by 1-3% 2 sludge.

Description

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The invention relates to a technique for treating oil-containing water and can be used to purify oil-containing water on ships, as well as in wastewater treatment on drilling platforms, enterprises of the oil refining and oil-producing industry, and other facilities where waste water containing oil products is formed.

The aim of the invention is to increase the cleaning ability of the device

The goal is achieved by that. that an insert from a hydrophilic material is placed in the central pipe; the hydrophilic material of the insert tightly adjacent to the walls of this pipe prevents the droplets of petroleum product from entering the inside of the central pipe; When the insert fits snugly to the surface of the central pipe, in the absence of a gap between the insert and the inner surface of the pipe, drops of oil product will collect on the outer surface of the central pipe and then, under the influence of archimedean force, will rise up to the oil tank. Thus, the possibility of oil drops falling into the cavity of purified water that increases the cleaning ability of the considered device by (1-3)%.

FIG. 1 is a general view of the device for purifying oil-containing water (section) in FIG. 2 is a section A-A of FIG. one

The device for purifying oil-containing water includes a housing 1 with a nozzle 2 supplying polluted water and a nozzle 3 withdrawing oil from the oil tank 4 located in the upper part of the body. Below nozzle 2 is located the VJ C distribution

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Flow 5 polluted water. Under the distributor 5, a cleaning unit is installed, made in the form of a frame 6 with longitudinal and transverse channels and filtering coalescing material 7. The frame 6 is arranged in a spiral around the central perforated pipe 8, and the coalescing material 7 is placed between the turns of the frame 6. The upper part of the cleaning the block is bounded by a perforated disc 9, having in its central part an impermeable surface to which the central tube 8 is attached. A conical oil collector 10 is tightly attached to the disc 9 along the perimeter to the disc 9, pipe 11 with a suction device made, for example, in the form of a jet apparatus 12. The lower part of the cleaning unit is limited by an impenetrable horizontal partition 13, tightly attached to the housing 1 and the central pipe 8. The partition 13 divides the housing 1 into a cavity 14 contaminated water and the cavity 15 of purified water and has an opening 16. connecting cavity 15 with the inner cavity of the pipe 8. Inside the pipe 8 is placed an insert 17 of hydrophilic material, held in the lower position by one of the known methods, for example eF, by means checks the latch installed in an opening of the central perforated tube. The cavity 15 of the purified water is connected to the pump 18, the discharge nozzle of which is connected to the pipe 19 for discharging the purified water and the pipeline 20 supplying the working fluid to the jet apparatus 12, the outlet of which by the pipeline 21 is connected to the cavity 14 of the polluted water. The insert 17 may be made, for example, in the form of a loose fine-grained material placed in an elastic mesh bag, or in the form of a cylinder of compressed hydrophilic material. As the hydrophilic material can be used, for example, iron slag.

The device works as follows.

The contaminated water through the pipe 2 enters the upper part of the housing 1, is evenly distributed through the channels of the flow distributor 5 and passes along them downward towards the purification unit at a low speed. In the upper part of the housing 1, the separation of petroleum products begins, especially of the part that was presented in the form of large droplets. The separated oil product floats up and is collected in the oil tank 4. Next, the contaminated water enters the treatment plant.

the block, where the smallest drops of oil, which are not separated in the upper part of the device, participate in the process of coalescence, both due to surface and intra-pore coalescence. The purified eod through the central tube 8 and the cavity 15 of the purified water is discharged by the pump 18 to the outside of the device. The movement of fluid in the cleaning unit is as follows. When contaminated water enters through the outer layer of the frame 6 on the filtering and coalescing material 7, it is cleaned due to the coalescence of the oil within the material. The coarse oil product as a result of the pressure difference created by the pump in the central pipe 8 and the cavity 14 of the contaminated water passes through the pores of the material into the longitudinal channel formed by the next layer of the frame. Under the action of the Archimedean force, and the force created by the jet device, part of the enlarged oil product with a part of the ox is retracted to the upper part, and the remaining oil particles coagulate on the surface of the filtering and coalescing material 7, enlarged and also carry the water upwards, and the rest move in two directions x: to the inside of the filtering-coalescing material on the pores and along the spiral channel around it. The separation process on subsequent layers is similar. The physical basis of the process is the movement of oil droplets in the flow to the fibrous wall under the action of mass force due to flow along a curvilinear surface, as well as the subsequent coagulation of oil products into larger droplets on the fibers and their ascent under the influence of the Archimedean and gravitational forces. In the process of moving the purified water along the spiral channel, the probability of oil particles reaching the central pipe 8 is not excluded. However, an insert 17 made of hydrophilic material is an obstacle to the passage of oil particles inside the pipe 8. Due to the tight fit of the insert 17, oil particles will be retained on the outer surface of the insert 17 and on the outer surface of the central tube 8, then they will coagulate and, as a result of the difference between the Archimedean and gravitational forces, will lift Set up to the oil tank.

The proposed device has the following advantages:

improved cleaning ability of the device by 1-3% compared with the device according to the basic invention:

increased device life before replacement of the cleaning unit

Claims (1)

The invention of the device for cleaning oil-containing e with the fact that, for the purpose of cleaning ability of the device is equipped with a tightly adjacent surface of the central pipe waters. No. 1592282, from L and Ch and Yu-5 of the hydrophilic material. Now that, in order to increase the cleaning capacity of the device, it is provided with a tight fit to the inner surface of the central tube of the insert. i x / 17 7 Rig. Z