SU1304848A1 - Apparatus for cleaning liquids - Google Patents

Abstract

The invention relates to a device for cleaning liquids, can be used in the chemical, petrochemical, petroleum, metallurgical and metalworking industries and improves the efficiency of phase separation of concentrated liquids while simultaneously improving the purification of separated phases from suspended venous gases. The device includes a housing with liquid inlet and outlet nozzles, thin-layer separation units from precipitation elements, the precipitation elements of which, with their side edges, are connected to the walls of the housing, and the end edges of the housing form, along the horizontal longitudinal axis of the housing, a slit channel of variable cross section with lattice walls and under the straight angle to the longitudinal axis of the grating wall of the chamber clarification. Thin layers, the cells form a phase separation and purification chamber, equipped with a collector with a liquid supply nozzle and a slot opening for the introduction of liquids into the slot channel between the thin layer blocks. The clarification chamber is provided with collectors with slotted holes and nozzles for draining liquids. 2 h. apt. 5 il. € (L from about 4 00 4 QO

Description

The invention relates to devices designed for cleaning liquids containing petroleum products, suspended and organic substances, in particular for cleaning oil-containing wastewater before being fed to biological treatment plants, as well as for cleaning waste oil from suspended solids using water, and can be used in the chemical, petrochemical, petroleum, metallurgical, and metalworking industries.

The purpose of the invention is to increase the efficiency of the separation of the phases of concentrated liquids while at the same time improving the purification of the separated phases from matter.

Figure 1 shows a device for cleaning a liquid; figure 2 - section aa in figure 1; in FIG. 3 - the same for a three-stage device; Fig. 4 is a variant of the connection scheme of the nozzles of a three-section device; Fig. 5 shows a device, an embodiment with flotation treatment. The device consists of a housing 1, in which thin-layer separation units are installed, made of plate-bearing precipitating elements 2. The lateral edges of the precipitating elements are connected to the walls of the housing 1, and the free edges form the end edges O-O in the housing a slit-shaped drip of 3 small cross-sections with replate walls 4 and at a right angle to the О-О axis peiueT-shaped wall 5. The housing is located with the horizontal direction of its longitudinal axis. The thin-layer blocks form a separation chamber b and phase 6 cleansing. A grate wall 5 borders the phase illumination chamber 7 7.

Chambers 6 and 7 are equipped with a collector 8 for supplying cleaned fluids with a supply nozzle 9 and a slot 10, a light phase drain collector 11 with a drain nozzle 12 and a slot hole 13, a drain phase collector 14 with a discharge nozzle 15 and slot 16, a collector 17 removal of recirculated fluids with a branch pipe 18 of the outlet and a slot hole 19.

During the stepwise cleaning of the liquid, the device is supplied with partitions 20, which form sections 21-23.

In the case of sectional execution of the device, each section operates similarly to a single-section device; the source liquid for each subsequent section is the liquid from the previous sections of the device (Fig. 4). at the same time, pumps 24 and pipelines 25 provide liquid supply and recirculation, and collectors 26 and 27 - accumulation of phases separated from liquid.

In the proposed device can be applied to the tool 28 flotation in the chamber 7

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clarification, while for electrically conductive liquids, it is advisable to use electroflotation means mounted on the longitudinal axis of the housing 1.

The device works as follows.

The cleaned fluid enters the chamber 6 through the slotted hole 10 of the collector 8 with the pipe 9 and moves along the slot channel 3 along the axis O-O to the slot hole 19 of the collector 17 discharging the recirculated liquid with the pipe 18. As the liquid moves but the slot channel 3 it separates with the formation of ascending and descending thin-layer flows between the lamellar precipitating elements 2, in this way the predominantly light ones are concentrated in the ascending liquid flows, and in the downward flows mainly ue particles move along the bottom surfaces of elements 2, heavy-weight particles - in their upper surfaces and are coarsen.

Upon reaching the clarification chamber 7, the enlarged light particles float up and form a light phase, which is discharged through the slit hole 13 to the collector 11 and further to the nipple 12. Heavy particles in the chamber 7 are deposited and carried away by the flow of liquid through the slit 16 a collector 14 and then into the nozzle 15. Light particles, which slowly float up and settle out, enter through the slot 19 to the collector 17 and then into the nozzle 18 for recirculation, which ensures the enlargement of the remaining particles with the particles of the original liquid.

The use of flotation means accelerates the separation of the water and oil phases in the light chamber and reduces the turbine isolation of water in the light chamber when the purified fluid is intensively circulated through the axial collector of the light chamber.

In each version of the device, intensive recirculation of the liquid helps to clean the light phase from suspended particles by washing it in ascending and descending thin layers of liquid.

When using a device for separating mixtures of water and oil, which are formed, for example, by washing the used salt oil with oil-emulsion waste water, separation of the water, oil and sludge phases to the residual oil and sludge content in the water phase is achieved to 80 and 40 mg / l with the initial content of oils in water up to 30 vol.% and sludge up to 0 vol.%.

Claims (3)

1. A device for cleaning liquids, comprising a housing with nozzles for supplying and discharging liquids, a thin layer unit separation from downward precipitating elements, characterized in that, in order to increase the efficiency of separation of liquid phases while improving the purification of separated phases from suspended weights, it is equipped with an additional thin layer separation unit from upward precipitating elements mounted above the down the elements, the side edges of the precipitation elements are connected to the walls of the housing, the input end edges of the elements are located at the horizontal longitudinal axis of the housing with ducation of the slotted channel of variable section, and the output Mechanical edge disposed vertically with the formation of a lightening chamber between them and the housing, the liquid supply nozzle is provided with a collector with a slit opening located in nie.neBOM, and the nozzles for discharge of liquids are provided with collectors with a slit opening. 2. The device according to claim 1, characterized in that it is made of several similar sections and is provided with phase collectors and pipe connecting sections with pumps. 3. The device according to claim 1, characterized in that the clarification chamber is provided with a flotation means installed on the longitudinal axis of the housing. 2 -HXt-C ixi-r-c re-HxJ-c 27 Dodo g Split. butter,, B 911 21 - OTG 25 25 Phi. 12 P .b