SU990260A2 - Apparatus for dewatering oil and cleaning it from mechanic impurities - Google Patents

Description

one

The invention relates to the technique and technology of oil treatment and can be used to clean oil from water, crystalline salts and mechanical impurities in oil fields and refineries, it can also be used to regenerate used lubricating oils at oil depots.

According to the main author. St. No. 597392, a device for dewatering and cleaning oil from mechanical impurities is known, including a horizontal tank, inside which there are transverse negative and longitudinal positive electrodes, the negative electrode being made in the form of a grid with a bundle of wires in the nodes, and a positive one in the form of longitudinal plates equipped with a lid one.

A disadvantage of the known device is the difficulty of the process of merging water globules on the surface of positively charged plates. As a result, it is possible to form a layer of highly concentrated emulsion at the bottom of the device and a significant decrease in the intensity of the electric field due to the high specific conductivity of such emulsions. A decrease in the intensity of the floor leads to the disappearance of the corona discharge and the efficiency of the device operation drops sharply.

5The purpose of the invention is to intensify.

the process of dewatering and refining of oil due to flushing of globules of water and particles of impurities from the surface of the electrode

To this end, the device for dewatering and cleaning oil from mechanical

° impurities, including a transverse negative electrode and a longitudinal positive electrode with a lid, the positive electrode and the cover are hollow, perforated and equipped with a supply pipe for the aqueous solution of the demulsifier.

FIG. 1 shows a diagram of the proposed device; in fig. 2 is a section A-A in FIG. one.

A device for dewatering and refining oil from mechanical impurities consists of a horizontal cylindrical body 1 with a fitting 2 for introducing treated oil, a fitting 3 for draining dried and refined oil, a fitting 4 for draining water and a catchment basin 5.

On the inlet side of the oil, on a conical coil 6 made of dielectric material, a copper grid electrode 7 is mounted with bundles of copper wires 8 in the nodes, which is connected to the negative pole of the current source 10 by electrical insulating wire 9.

At a certain distance from the grid electrode 7, a positive electrode P is installed. Electrode 11 consists of a row of vertical hollow ducts 12 arranged parallel to the axis of the dehydrator housing 1 and bent along the cylindrical surface of the lid 13. The walls of the vertical ducts 12 and the lid 13 are perforated with small diameter holes. 14. The internal cavities of the lid 13 and the ducts 12 communicate with each other by means of slotted slots 15. The positive electrode is provided with nozzles 16, which serve to supply an aqueous solution of the demulsifier to o its internal cavity, and also for its fastening to the dehydrator case. The positive electrode 11 and the dehydrator housing are grounded by an insulated electric wire 17.

The device works as follows.

The oil containing the demulsifier and heated to the required temperature is fed through the inlet fitting 2 to the grid electrode 7. At the same time, the oil acquires a negative electrical charge, which is concentrated at the interface of the water-oil phase, crystalline salts-oil, mechanical impurities - oil. Thus, water globules and solids are negatively charged.

The oil then passes through the gaps formed by the vertical boxes 12 of the positive electrode 11. At the same time, the charged solids and water globules are attracted to the walls of the boxes 12 and the covers 13 of the positive electrode.

In the internal cavity of the positive electrode through the pipes 16 serves an aqueous solution of the demulsifier. The latter, emerging from small-diameter holes on the walls of the vertical boxes 12 and the cover 13, irrigates the surface of the electrode 11.

Globules of water and solid particles (salts, mechanical impurities), attracted under the action of electrostatic forces to the surface of the positive electrode, merge or pass into the volume of the film of an aqueous solution of the demulsifier on it. Then, together with the aqueous solution of the demulsifier, it is drained to the bottom of the device, accumulated in the sump 5 and removed through the drainage nozzle 4.

Oil that has been dehydrated, desalted and free from mechanical impurities is discharged through shtucer 3.

As shown by preliminary laboratory studies, the application of the invention allows to increase the productivity of one apparatus with a volume of 200 m from 9.5 million m to 11.8 million m per year.

Claims (1)

Invention Formula A device for dewatering and cleaning oil from mechanical impurities according to ed. St. No. 597392, characterized in that, in order to intensify the processes of dehydration and purification due to s.wash from the surface of the electrode of the globules of water and particles of impurities, the positive electrode and the cover are hollow, perforated and equipped with a pipe for supplying an aqueous solution of the demulsifier. Information sources, taken into account during the examination 1. USSR Copyright Certificate No. 597392, cl. In B1 D 17/06, 1975 (prototype).