RU2327506C1 - Device for continuous cleaning of process liquids - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to the device to separate water-oil emulsions and other liquid mixes with various density and solid impurities and may be used in any industrial branch, in particular, for separation of petroleum products and solid inclusions from water. The device contains a setting zone made in the form of a helix with bens at the end parts incorporating the inlet branch pipe and the top outlet branch pipe. The inlet is shared by the top and bottom drain branch pipes and incorporates a horizontal separation flange. The inlet section area equals that of the settling zone. The inlet and the top drain branch pipes are arranged on the opposite sides of the settling zone.

EFFECT: higher quality of separation, reduced time of separation and simpler separation process.

5 cl, 3 dwg

Description

The invention relates to a device for cleaning liquids from mechanical insoluble impurities, mainly sand and other insoluble solid inclusions, mainly water with oil products and solid inclusions in a continuous cycle, and can be used to clean contaminated pools from industrial production in the extraction of minerals and other products from production waste and improving the environmental consequences of human life and production.

A known installation for the treatment of wastewater from oil products and mechanical impurities, containing a sump with partitions, a compartment for accumulating oil, pipes for supplying wastewater, drainage of purified water and oil products, regulators of the levels of oil and water, the upper edges of the partitions are located at the same level, while the last partition is made blind from below and forms a compartment for purified water, and the purified oil compartment is formed by the last blind partition from below, a nozzle for supplying waste water is open a clean end up at the level of the lower edge of the first partition, and the pipe for draining purified water is located in the lower part of the sump in front of the last partition and is connected to a water seal and equipped with a spray (see RF patent No. 2111197 according to class B01D 17/028 for 1998) .

The disadvantage of these installations is the complexity and cumbersome design of the bath itself and the poor quality of separation of water and solids. In addition, the installation consumes a lot of energy to supply water for spraying and reduces the productivity of the installation itself in the process.

Known settling tank containing a rectangular in plan capacity with an inlet pipe and trays for supplying and discharging water. As a device for collecting and removing sediment used permeable film located at the bottom of the tank. The precipitate is deposited on a film, which is then wound on a shaft using a separate drive, and water without sediment is removed by gravity through the upper drain pan (see RF patent No. 2173570 for class B01D 21/02 for 2001).

The disadvantage of this type of device is the design complexity due to the introduction of level tubes and a drain compartment, unreliable and inefficient separation of liquids during operation. This is because with an increase in the supply of the mixture to the first container, its speed increases, and the path length remains constant. As a result, the residence time of the mixture in the settling zone of the tank decreases, it does not have time to effectively separate with heavy fractions, flows with them into the drain trays and is removed from the tank without being separated from the liquid phase. In addition, the tank itself is bulky and heavy, and in it the fluid flow moves in a narrow stream and not across the entire width of the tank. This is because the internal area of the tank significantly exceeds the area of the inlet channel, and the liquid fills the entire tank only until the liquid reaches the drain trays, and then it moves in a narrow stream and is not mixed with the rest of the liquid in the tank, creates local local flow, mainly in the upper zone, captures fine suspensions and does not separate them from the liquid, because in the tank itself there is no change in the direction of flow, but there is only free flow.

The technical task of the proposed device is to simplify the design, improve the quality of separation of the rigid insoluble phase from the liquid, increase productivity when cleaning liquids and the possibility of its mobility when installed directly on the job near the reservoir to be cleaned, and does not require pumping and transportation of the contents to separate the mixture and vice versa return of the purified liquid.

The specified technical problem is achieved by the fact that in the proposed device for continuous purification of process fluids containing a receiving tank with an inlet channel, a settling zone and at least two drain pipes, the input channel and drain pipes being located in different places of the settling zone, one of the drain pipes is made in the lower and upper parts of the settling zone, the receiving tank and the settling zone itself are made together, have the form of a spiral with limb in the end parts, at the ends of which are the input and upper a drain pipe, the passage area of the inlet channel is at least equal to the area of the passage section of the settling zone, the inlet of the upper and lower drain pipes is made common and provided with a dividing edge located inside the settling zone and parallel to the horizontal generatrix of the settling zone.

Another difference of the proposed device is that the cross-sectional area of the spiral to the lower drain pipe is larger than the cross-section of the spiral after the lower drain pipe, the total cross-sectional area of the upper and lower drain pipes is equal to the cross-sectional area of the settling zone, the opposite ends of the spiral of the settling zone are provided with smooth transitions, which can be single or multi-stage.

Figure 1 shows a diagram of the proposed device (top view).

In Fig.2 - view A of Fig.1 (general view).

Figure 3 is a section along aa of figure 2.

The proposed device contains a receiving tank 1, the input channel 2, the settling zone 3, the upper 4 and lower 5 drain pipes. The settling zone 3 is made in the form of a spiral with branches 6 and 7 and is equipped with a common inlet 8 with a rigid dividing edge 9. In the end parts 10 and 11 of the settling zone 3, smooth bends 12, 13, 14 are made, and the drain pipe 4 is located above the inlet channel 2. The dividing edge 9 is located inside the hole 8 and is parallel to the inner wall of the hole 8 of the branch 6 of the settling zone 3. The area of the passage section of the branch 6 is made equal to the area of the passage section and is equal to (S), and the area of the passage sections of the lower drain pipe 5 (S ₁ ) and top its drain pipe 4 (S ₂ ) are in the ratio S = S ₁ + S ₂ .

The work of the proposed device is as follows. The installation is delivered to the place of work and rigidly fixed. Then a mixture of liquid with solid impurities is pumped from a natural or artificial reservoir or reservoir from the reservoir or main and through the inlet channel 2 it is fed into the settling zone 3. From the settling zone 3, through a smooth transition 12, the mixture is sent to the spiral branch 6. Moving along a curved line, the solid part of the mixture under the influence of inertia and gravity is pressed against the inner surface of the channel of the branch 6, and the liquid moves at a certain distance from it. Having reached the separating edge 9, a part of the liquid, together with insoluble inclusions, is removed from the settling zone by a fluid flow and sent to the filtering units, where they are separated. And the other part of the fluid flow moves upward along the branch 7 of the spiral and, passing smooth transitions 13 and 14, is removed from the device through the upper drain pipe.

Due to the equality of the flow cross sections and the arrangement in a spiral, the entire volume of liquid is forcibly pressed to the outer surface of the branch 6 of the spiral and is removed from it for additional filtration. Most of the liquid without solid heavy inclusions is removed from the device and sent either to the drain, or for additional processing.

Using the proposed device when separating mixtures from heavy solid inclusions allows a more intensive process of separating the mixture, regardless of the amount of the mixture. In addition, the device itself is simpler to manufacture and more mobile compared to known designs of devices for similar purposes.

Another advantage of the proposed device is that the movement of liquids inside the tank is carried out without additional devices, and its direction of motion changes many times and causes the entire volume of liquid to separate immediately, and not only use gravity and settle to the bottom of the tank over its entire area, which makes it economical during operation. In addition, the implementation of the device itself in the form of a spiral with a displacement in the vertical plane and the separation of flows in the lower part allows to simplify the design, reduce the weight of the installation with a good quality separation of the mixture into components, and also allows you to make it mobile with high throughput, which gives a large advantage over known devices of a similar purpose.

Claims (6)

1. A device for continuous cleaning of process fluids, including a receiving tank with an inlet channel, a settling zone and at least two drain pipes, the input channel and drain pipes being located on opposite sides of the receiving tank, characterized in that the drain pipes are made in the lower and upper parts the settling zone, the receiving tank and the settling zone itself are made together, have a spiral shape with bends in the end parts, at the ends of which are the inlet and upper drain pipes, the passage area th input channel cross section, at least, is made equal to the passage section area the settling zone, an inlet in the upper and lower common drain connections formed and provided with a separation edge located inside the settling zone and parallel to the horizontal generatrix of the settling zone. 2. The device according to claim 1, characterized in that the cross-sectional area of the spiral to the lower drain pipe is made larger than the cross-section of the spiral after the lower drain pipe. 3. The device according to claim 1, characterized in that the total area of the upper and lower drain pipes is equal to the area of the passage section of the settling zone. 4. The device according to claim 1, characterized in that the upper drain pipe is located above the upper part of the spiral of the settling zone. 5. The device according to claim 1, characterized in that the opposite ends of the spiral of the settling zone are provided with smooth transitions. 6. The device according to claim 5, characterized in that the smooth transitions can be single or multi-stage.

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