SU827110A1 - Electric separator - Google Patents

Description

one

The invention relates to devices for the treatment of petroleum products, petroleum and other non-polar liquids in an electric field and can be used in the petroleum refining and petrochemical industries.

Known electric separators, comprising a housing with nozzles of the inlet and outlet of the liquid and the liquid distributor, over which the electrodes 1 are installed.

The disadvantage of this device is that high-quality purification of oil products in it is achieved only at sufficiently high initial concentrations of electrolyte impurities; in addition, the quality of processing is adversely affected by the uneven distribution of the product across the cross-section of the apparatus, especially in large apparatuses.

The closest in technical sushi, nosti and the achieved result is an electric separator, comprising a housing with liquid inlet and outlet connections and a liquid distributor, over which electrodes are mounted, and provided with a perforated partition installed above the distributor and a reactant supply pipe located above the partition 2. The electric separator can be equipped with mixing vertical nozzles installed at a distance from the partition opposite the openings, bump stops placed at a distance of from the ends of the nozzles and overflow plate, fixed on the partition.

A disadvantage of this device is that high-quality cleaning in it is achieved only at a sufficiently high speed of the oil product in the openings of the partition, i.e., with large pressure drops on the partition, which leads to the condition of the structure.

The aim of the invention is to improve the efficiency of the process.

For this purpose, the vertical mixing nozzles are fixed in the openings of the partition, and the bottom grille is provided with installed additional electrodes.

Holes or slots are made in the walls of the mixing tubes above the level of the partition.

The total flow area of all mixing nozzles is 0.1-0.4 of the cross-section of the interelectrode space.

Claims (4)

The diameter of the electrodes was between 0.20 and 0.07 of the diameter of the mixing tubes. FIG. 1 shows a general view of the electric separator in the section; in fig. 2 is a section along A-A in FIG. 1. The electric separator contains a housing 1, inside of which are placed the main grounded 2 and potential 3 electrodes. The latter are fixed in the grid 4, suspended on insulators 5 and connected with a current-carrying cable 6 through a bushing 7 with a rectifier 8. In the upper part of the electric separator there is a liquid outlet pipe 9, and in the lower part - liquid inlet pipes in the form of a perforated mother liquor -distributor 10 of the pipes. A partition I is placed horizontally above the distributor, a vertical partition 12 and an overflow plate 13. In the case above the partition 11 a reagent supply fitting 14 is fixed, a drainage nozzle 15 is welded in the bottom. In the openings of the partition And the mixing vertical nozzles 16 are fixed, so that their bottom end is flush It is located under the partition 11, along the axis of the nozzles there are placed rod additional electrodes 17 suspended from the intermediate grid 18 connecting the ends of the electrodes 3. In the walls of the mixing nozzles 16 are higher than the level of the partition walls And provided with openings 19. Instead of the holes in the walls of the pipes 16 may be arranged along the slot and slot generator. For the most efficient operation of the apparatus, the diameter of the electrodes 3 is 2.5-4 times smaller than the length of the sides of the square cells formed by the grounded electrodes 2, and the diameter of the rods of the additional electrodes 17 is 0.20-0.07 of the diameter of the nozzles 16. The electric separator works as follows. The oil product is fed into the apparatus through the openings of the distributor 10, above which a reagent-electrolyte layer is maintained. After processing in this layer, the petroleum product passes inside the nozzle 16, in the electric field between the rod electrodes 17 and the walls of the nozzle grounded through the housing. The same electric field is passed through the holes 19 of the reagent-electrolyte spout supplied to the wall And through the fitting 14 and distributed through it by means of the vertical wall 12. The level of the reagent on the wall is shown in FIG. 1 wavy line. Reagent-electrolyte streams, falling into an electric field of high heterogeneity inside the nozzle 16, are polarized and dispersed under the action of electric forces into small droplets, which are picked up by the oil product flow and removed from the mixing nozzles 16. During the movement inside the nozzles, the oil product is treated with a reagent. for example, alkalization, neutralization, extraction, water washing, etc. After exiting the nozzles 16, the flow rate decreases and the largest droplets of reagent settle on the partition I. Smaller droplets fall with oil into the electric field of optimal heterogeneity between electrodes 2 and 3, where under the action of electrical forces, they move relative to the oil product, further processing it, and when two drops approach each other, they merge into a larger and heavy drop that settles onto the partition. The oil product refined from impurities and electrolyte from the reagent is discharged through the upper pipe 9, and the reagent circulates between the pipes 16 and electrodes 2 and 3. Fresh reagent is fed through the fitting 14, its excess from the partition 11 flows through the plate 13 into the lower part of the apparatus, from where its output is through pipe 15. The high efficiency of the proposed device is due to the fact that it creates 2 zones of electrical treatment, differing in the geometry of the interelectrode space and, consequently, the speed of movement of the processed product and The characteristics of the electric field: the zone where the oil is mixed with the reagent in the mixing tubes and the separation zone in the interelectrode space above the partition. The use of the proposed device allows to significantly reduce the consumption of the reagent, since the small size of its particles and their continuous movement provide effective mass transfer. The energy consumption for electrodisnering is many times less than the energy consumption for hydrodynamic dispersion in devices used in engineering. The implementation of all stages of the process in one unit significantly reduces capital costs. Claim 1. Electrical separator comprising a housing with liquid inlet and outlet nozzles, a dispenser of the processed product, above which main electrodes are mounted, fixed between the upper and lower gratings, and a horizontal partition with vertical mixing nozzles, installed above the distributor, characterized in that In order to increase the efficiency of the process, the mixing nozzles are fixed in the openings of the partition, and the lower grate is packed with the additional electrodes. 2. Electrical separator according to claim 1, characterized in that holes or slots are made in the walls of the mixing conic tubes above the level of the partition. 3. The electric separator according to claim 1 is different from the fact that the diameter of the additional electrodes is 0.2-0.07 of the diameter of the mixing tubes. 4. The electrical separator according to claim 1, characterized in that the total flow area of the mixing tubes is 0.1-0.4 and the cross-section of the interelectrode space above the partition. Sources of information taken into account in the examination 1. US patent L 3205160, cl. 204-302, 12.02.65. 2. Certificate of authorship on application no. 2592260 / 23-26, cl. In 01D 17/06, 1978 (prototype).