SU1421422A1 - Hydrocyclone - Google Patents

Abstract

The invention relates to devices for separating inhomogeneous systems under the action of centrifugal forces and can be used in the p-chemical, pulp and paper, oil refining and other industries. The purpose of the invention is to increase efficiency in the separation of low concentrated suspensions. The hydrocyclone consists of body 1 with inlet (VP) 2, SLU1VNYH 3 and Peskovy (PP) 4 branch pipes. PP 4 is made of elastic material and placed in the chamber (K) 5. K 5 is connected

Description

Rocklet

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Razdek ena

suspension

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pipelines through the throttle 6 and the filter element 7 with VP 2. In addition, K 5 is connected via a liquid flow regulator 8 to a drain pipe 3, the drive of regulator 8 is connected to a suspension concentration meter 9, K 5 is made to valve 10. The initial suspension through VP 2 enters the housing 1 and is twisted. In this case, the clarified liquid is removed from the apparatus through the drain pipe 3, and the condensed product through PP 4. When the concentration of the solid phase changes in the initial suspension, the flow cross section of PP A changes by changing the fluid pressure in K 5 by changing the fluid flow through the regulator 8 The liquid is supplied to K 5 from VP 2 through filter element 7 and throttle 6. 1 Il.

one

The invention relates to devices for separating liquid inhomogeneous systems under the action of centrifugal forces and can be used in chemical, pulp and paper, oil refining and other industries.

The purpose of the invention is to increase the efficiency in the separation of less concentrated suspensions.

The drawing shows a hydrocycle. flax, general view

A hydrocyclone consists of body 1 with inlet 2, drain 3 and Peskov 4 branch pipes. The latter is made of elastic material, for example rubber, and is placed in chamber 5. Chamber 5 is connected by pipelines through chokes 6 (in the form of a throttle washer, valve, etc.) and filtering element 7, designed to prevent contamination of the clarified fluid flow and thrott clogging with solid particles with the inlet nozzle 2. In addition, the chamber 5 is connected through the fluid flow controller 8 to the drain nozzle 3. The drive of the regulator 8 is connected to the suspension concentration meter 9. Dp preventing excessively high flow rates of the liquid phase through the sand pipe during periods of starting and stopping a hydrocyclone chamber 5 is provided with a valve 10 designed to lock it at pressures lower than the minimum control level. If it is necessary to extend the control range at the input of the camera 5,

set multiplier (hydraulic amplifier).

Hydrocyclone works as follows.

The initial divided suspension through the inlet 2 enters the housing 1 hydrocyclopea, where it acquires a rotational motion. Under the action of centrifugal forces, the suspension is separated, and the clarified weave is removed from the hydrocyclone through the drain pipe 3, and the solid particles in the form of a thickened suspension are removed through the elastic sand pipe A.

In practice, the work of hydrocyclists is often accompanied by a change in the concentration of the solid phase in the suspension supplied to the separation (the pressure of the suspension at the inlet to the hydrocyclone remains unchanged). A change in the concentration of the suspension at the entrance to the hydrocyclone entails a change in the concentration of the thickened suspension, i.e. . load on the sand pipe on the solid phase. In order to achieve maximum efficiency of the separation process in the hydrocyclone, the flow cross section of the sand pipe 4 is controlled depending on the solids content in the thickened suspension measured by the concentration meter 9 (it is also possible to adjust depending on the solids content in the initial suspension ). The change in flow cross-section (diameter) of the elastic-sand nozzle 4 is made by changing the pressure of the fluid in chamber 5 by changing the flow rate of the fluid through the regulator 8. When the hydrocyclone operates in the optimal (calculated) mode, the regulator 8 is in the state providing maintenance in chamber 5, connected through throttle 6 and filtering element 7 to inlet pipe 2, the fluid pressure at the calculated level at the minimum required flow rate of fluid through the regulator. With an increase in the solid phase content in the slurry, the concentration meter 9 causes the error signal to drive the regulator 8. The flow cross section for the liquid increases and its flow through the regulator to the drain pipe 3 increases. At the same time, the flow rate of fluid from the inlet nozzle 2 due to the presence of throttles 6 is less than the speed of its withdrawal through the regulator 8. As a result, the fluid pressure after the throttles 6, including the chamber .5, decreases. Sand pipe 4 under the action of elastic forces and pressure from the side of the thickened suspension expands, increasing the diameter of the flow area. As a result, the fluid flow through the sand nozzle 4 increases and the concentration of the thickened suspension decreases, returning to the optimum level. With a decrease in the solids content in suspensions, the adjustment process proceeds in the opposite direction: the flow rate of liquid through the regulator 8 decreases (up to complete cessation), the pressure in chamber 5 increases, as a result the diameter of the sand nozzle A decreases, and the concentration of the thickened suspension increases.

Thus, during the operation of the hydrocyclone, the diameter of the sand pipe is automatically controlled depending on the solids content of the suspension. AT

Editor A. Borovich

Compiled by D. Baranov Tehred M. Didyk

Order 4363/8

Circulation 523

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

5 0 5 o d

five

five

The result is to prevent overloading of the sand pipe in the solid phase with an increase in its content in the initial suspension, which prevents its transfer into the clarified fluid flow and, as a result, ensures the high efficiency of clarification in the hydrocyclone. At the same time, the reliability of the hydrocyclone operation with respect to the plugging of the sand pipe is ensured. By decreasing the solids content in the initial suspension, unnecessary "fluid losses with the thickened suspension withdrawn from the hydrocycle are prevented, i.e. the degree of condensation is high. Thus, maximum efficiency and stability of the separation process in the hydrocyclone is achieved. At the same time, external sources of energy are not required for regulation. Hydrocyclone has a wide range of applications, since it can be effectively used not only in separation of highly concentrated, but also in low concentration suspensions.

Claims (1)

Invention Formula A hydrocyclone, comprising a housing, an inlet and a drain connection, a sand connection made of an elastic material, located in a chamber filled with liquid, and means for changing pressure in the chamber, characterized in that, in order to increase the efficiency in separating low-centered suspensions, it is equipped with a throttle and filtering element, - the means of changing the pressure in the chamber is made in the form of a fluid flow regulator, while the chamber is connected to the inlet pipe through the throttle and filter element 1 and to the drain pipe ithout liquid flow regulator. Proofreader L. Pilipenko Subscription