SU1212595A1 - Arrangement for separating suspensions - Google Patents

Description

The invention relates to devices for the separation of liquid inhomogeneous systems under the action of centrifugal forces, in particular to hydrocyclones, and can be used in the chemical, petroleum refining and other industries.

The purpose of the invention is to increase the efficiency of separation and regeneration of the filter element.

The drawing shows the proposed device, a general view. {,

The device consists of a supply manifold:; to which the inlet nozzles 2 connect hydro cyclones 3. Sand nozzles 4 hydrocyclones are connected to a thickening chamber 5 with a discharge nipple 6. The drain nozzles 7 hydrocyclones are connected to the chamber 8 of the collection of the clarified liquid. The latter is made with the outer chamber 9 connected by pipeline 10 through the filtering element 11 with a thickening chamber 5. In the upper part of the thickening chamber there is a pulsation chamber 12 arranged in the form of an annular cavity and equipped with a gas supply 13 and a pneumatic tube 14. Pneumatic tube 14 one end embedded in the pulsation chamber, and the other end connected through the collector 15 with axial tubes 16 installed in the drain nozzles of hydrocyclones. Pneumatic tube from the end face, recessed into the chamber, is equipped with a float valve 17.

The device works as follows.

Separated suspension under pressure from the supply manifold 1 through the inlet nozzles 2 enters the hydrocyclones 3, where it acquires a rotational motion. Under the action of centrifugal forces, the suspension is separated, while solid particles in the form of a thickened suspension are removed from hydrocyclones through the sand nozzles 4 into the thickening chamber 5, and then after additional thickening are removed from it through the discharge nozzle 6. The clarified liquid is removed from the hydrocyclones through the drain nozzles 7 into the collection chamber 8. A jet of liquid released under pressure from chamber 8 into outer chamber 9 ejects the fluid in the latter. In this case, the liquid is sucked through the pipeline 10 and the filtering element 11 from the thickening chamber 5. This achieves an increase in the yield of the clarified liquid and an increase in the degree of thickening of the suspension in the device.

During operation of the device, through the fitting 13, a compressed gas (air or another gas depending on the technology requirements) is fed into the pulsation chamber 12 under a pressure that is greater than the pressure of the suspension in the thickening chamber 5. At the same time

due to the vacuum caused by the rotational movement of fluid in the axial zone (air column) of hydrocyclones through the axial tubes 16, the collector 15 and the pneumatic tube 14, the gas is sucked out of the pulsation chamber 12 and fed into the air column, hydrocyclones. This process is pulsating and is carried out automatically, without any additional devices, as follows.

0 The rate of gas supply to the pulsation chamber is set (for example, by means of a valve) less than the speed of its suction through the pneumatic tube. As a result, at some point in time, the gas pressure in chamber 12 is less than the pressure

suspension in the thickening chamber 5. At the same time, the liquid level in the pulsation chamber in communication with the thickening chamber starts to rise and the float of the valve 17 closes the end of the pneumatic tube 14, which is buried in the chamber 12. The flow of gas into the axial zones of the hydrocyclone stops. As the flow of compressed gas into the pulsation chamber continues, the pressure in it begins to increase and when it exceeds the pressure of the suspension in the thickener chamber, the level of the liquid in it begins to decrease. The float of the valve 17 is lowered and opens the end of the pneumatic tube 14, the flow of gas into the axial zones of the hydrocyclones is resumed. In the following, the cycles described are repeated.

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 1, thus, in the course of the device operation, the gas automatically oscillates into the axial zones of the hydrocyclones 3. At the same time, the suspension oscillates in the thickening chamber 5.

The self-pulsed air supply to the axial zone (air column) of the hydro-cyclone leads (due to the fluctuations arising from this) to a decrease in the effective viscosity of the suspension. This facilitates the separation of particles from the suspension and leads to

0 to increase the degree of clarification in a hydrocyclone.

At the same time, due to the fact that the air supply is pulsating in nature, a pulsed seal of the suspension occurs as it moves in the sand pipe, which ensures a high degree of thickening of the suspension.

Oscillations of the suspension, located in the thickening chamber, lead to continuous destruction and washing off of the sediment layer,

Formed on the surface of the filter element. Due to this, the hydraulic resistance of the filter element is maintained at the same low level during operation of the device. As a result, a high efficiency of filtering the suspension through the filter element for a long time and, consequently, high efficiency of the device as a whole, is provided.

Suspension level

Editor A. Vorovich Order 692/14

Compiled by V. Timoshkov Tehred I. VeresKorrektor M. Demchik

Circulation 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (2)

1. DEVICE FOR SUSPENSION SEPARATION, containing hydrocyclones with inlet, sand and drain pipes, a thickening chamber, a filter element, a clarified liquid collection chamber with an external chamber connected by a pipeline through a filter element with a thickening chamber, characterized in that, in order to increase the separation efficiency and regeneration of the filter element, hydrocyclones are equipped with axial tubes installed in the drain pipes, a pulsation chamber with a gas supply fitting and a tube, one end of which It is located in the pulsation chamber, and the other is connected to the axial tubes, while the pulsation chamber is made in the form of an annular cavity located above the thickening chamber above the filter element. 2. The device according to π. 1, characterized in that the end face of the tube located in the pulsation chamber is equipped with a float valve. go go Joint venture JV>