RU23394U1 - HYDROCYCLONE BATTERY FOR SUSPENSION SEPARATION - Google Patents

Abstract

1. A hydrocyclone battery for separating a suspension, including a preliminary separation hydrocyclone interconnected with an inlet, sand and drain nozzles and at least one smaller diameter cylindrical hydrocyclone for cleaning, also equipped with a feed, sand and drain nozzles, connected, in turn, with nozzles with a cylindrical collector for a thin fraction and a collector for a thickened fraction, characterized in that it is additionally equipped with an inlet collector for a shared suspension, setting located above the fine fraction collector, while all the collectors are made in the form of coaxial cylindrical tanks with inlet and outlet nozzles and are mounted on top of each other, and the preliminary separation hydrocyclone is made in the form of a vertical cylinder, which is connected by its sand pipe to the supply pipe of a cylindrical-conical hydrocyclone for cleaning, and the latter is connected by its drain pipe to the inlet of an additional collector for a fine fraction in the form of a second drain. 2. The battery according to claim 1, characterized in that it is additionally equipped with at least one cylindrical hydrocyclone, the sand pipe of which is connected to the supply pipe of the corresponding additional cylinder-conical hydrocyclone.

Description

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P J 3 1 8 1 .iX Bathshea hydrocyclones for suspension separation.

The utility model relates to devices designed to separate suspensions in the field of centrifugal forces and can be used in the construction, chemical and food industries.

Hydrocyclones are used as apparatus for classifying finely divided materials by size in a centrifugal field created as a result of pulp rotation, the technological calculation of which is reduced to determining productivity, particle size characteristics of products, and other indicators. The finer the size of the drain required, the less hydrocyclone should be. With large meals (with x factorization close to straightforward), obtaining a thin drain can be difficult. In such cases, re-classification of the discharge of the first classification technique is required, which is achieved by the use of baton hydrocyclones. Bath {fey hydrocyclones differ from each other in the number of elementary hydrocyclones, their design, size, layout, ways of feeding and unloading classification products. ed. O.S. Bogdanov. T 1. Preparatory processes. M., Nedra, 1972, p. 277-278.

So, it is known to use a hydrocyclone module containing two cylinder-conical bodies with tangential exhaust valves, drain and slurry nozzles and a flow divider. Hydrocyclone

IPC 7 V 04 S 5/24

equipped with a casing with an inlet and main openings, in which a flow divider and cylindrical parts of cylindrical-conical housings are placed, forming annular intermediate strips with cylindrical tubes with discharge windows in the upper part, impellers and screw guides on the inner surfaces, while cylindrical tubes are fitted with concentric drain pipes, with the possibility of rotation around its axis, drain aatubes are made in the form of truncated cones of porous material, and in a cylindrical cone exhaust channels are located on several levels. PRF No. 2014154, BI U, 06/15/94.

A device is also known that contains a preliminary separation hydrocyclone with a tangential inlet pipe, Sand and drain pipes, a group of parallel-connected hydrocyclones connected in parallel with the discharge pipe, the supply pipes of which are tangentially connected to the drain pipe of the preliminary separation hydrocyclone and are located uniformly on its level circles of P. of Germany No. 375759, cl. 50 e 3 / 10.1923 g. The disadvantage of this battery of hydrocyclones is the low separation efficiency.

Closest to the claimed utility model is a hydrocyclone battery designed to clarify suspensions. Improving the efficiency of separation is achieved by the fact that the battery of hydrocyclones is equipped with an additional group of partially reduced hydrocyclones decreasing in size along the drain and collectors of fine and condensed fractions, moreover, the fine fraction collector is poured out in the form of a cylindrical nozzle mounted coaxially above the hydrocyclone, 1c: to which the drain pipes of hydrocyclones of an additional group and having a tangential branch pipe are connected tangentially, and the condensed collector is and made toroidal AS 610564 06/15/78 BI No. 22.

The disadvantage is the high percentage of waste in the form of sand, low discharge capacity, the complexity of installation and dismantling.

The task of creating a useful model for separating a suspension in a field of centrifugal forces is to design a production plant taking into account the specifics of the shared suspension, namely, a suspension from natural chalk.

The technical results that can be obtained using the utility model are:

Reducing the percentage of waste in the form of sand;

Increased separation efficiency;

Simplification of the design;

Decrease in hydraulic resistance;

Simplification of installation and dismantling of separating elements.

including interconnected pre-separation hydrocyclone with inlet, discharge and drain pipes and at least one cylinder-conical hydrocyclone for cleaning, also equipped with supply, sand and drain pipes, connected in turn with pipes with a cylindrical collector for a thin fraction and a collector for a condensed fraction, additionally equipped with a collector for a shared suspension, while all the collectors are made in the form of coaxial cylindrical tanks with inlet and outlet pipes and tanovleny one above the other, and the pre-separation hydrocyclone is designed as a vertical cylinder which Peskov its nozzle connected to a supply pipe for recleaning cylindric hydrocyclone, and the latter to its drain connection is connected to the input of the additional collector for a fine fraction to a second sink.

In the best version of the baht | it can be additionally equipped with at least one more cylindrical hydrocyclone, the sand pipe of which is connected to the supply pipe of the corresponding additional cylinder-conical hydrocyclone.

The possibility of achieving results is justified by the fact that the main factor determining the performance of hydrocyclones is the discharge ratio, that is, the ratio of the diameter of the sand nozzle to the diameter of the drain pipe. With an increase in discharge ratio, the output of sands increases, their fineness decreases, and accordingly, this decreases

fineness, drain its output, and by decreasing the discharge ratio, the discharge yield increases and the difference between the discharge size and the feed size decreases. In a suspension from natural chalk, the solid content is small (2-10% of the solid class + 0.045 mm), and the solid content in the sands should be at least 50%. Therefore, it is advisable to increase the discharge ratio of the preliminary separation hydrocyclone, and enumerate the resulting condensed fraction (sands) in a cylindrical-conical hydrocyclone, i.e. It is not the purification of the preliminary purification hydrocyclone that comes to the fore, but the additional extraction of the finer amount and fraction from the condensed fraction, which became possible due to the supply of a cylindrical hydrocyclone and the connection of its sand nozzle to the feeding nozzle of a cylindrical-conical hydrocyclone. The thickened fraction in the first hydrocyclone, by increasing the discharge ratio, retains the mobility sufficient to supply it through the sand and feed pipes to the cylinder-conical hydrocyclone for purification, which allows to reduce the sand output from 40% to 4-16% depending on the Dt solid content in the feed (2-10% solid class + 0.045 mm).

A useful model is illustrated in FIG. 1, which shows a general view of a battery of two series-connected hydrocyclones, FIG. 2, which shows a general view of the bat1fei and several paired jet skis ISCHV1Sh

new, FIG. 3, which shows a top view of a battery of several ssfennyh hydrocyclones.

The bat {hydrocyclone fairy represents four cylindrical collectors installed one by one. At the top there is a collector 1 for a shared suspension, the inlet of which is a pipe 2, and the output of a pipe 3 connected to a supply pipe 4 of a cylindrical hydrocyclone 5 of preliminary separation. A collector 6 is placed under the collector 1 for a thin fraction of the discharge from the cylindrical hydrocyclone 5, while the outlet of the condensed fraction of the cylindrical hydrocyclone 5 is connected via the sand pipe 7 to the supply pipe 8 of the cylindrical hydrocyclone 9, the fine fraction output of which is connected by the drain pipe 10 to the fine fraction collector located under the collector 6, and the sand outlet pipe 2 is connected to the collector 4 of the thickened fraction. The output from the collectors 6 and the clarified liquid and the collector of the condensed fraction 4 is carried out respectively through nozzles 5.6, P.

The hydrocyclone battery operates as follows.

The separated suspension is fed through the inlet pipe 2 to the collector 1, from which through the pipe Z. connected to the supply pipe 4, it enters the cylindrical hydrocyclone 5, in which under the action of centrifugal forces there is a separation into fractions. The clarified fraction is withdrawn from the hydrocyclone 5 through the slaked pipe 3 to collector b, and the condensed fraction through the sand pipe 7 connected to the supply pipe 8 is fed into a cylinder-hydrocoyic hydrocyclop 9, of a larger diameter, in which the condensed fraction is further separated. The solid fraction from this hydrocyclops enters through the sand pipe 12 to the collector of the thickened fraction 14, and the light-colored fraction is fed to the collector 11. From the collectors 6,11,14, the shared suspension through the outlet pipes 15,163 17 is discharged.

In the best case scenario, at least two cylindrical hydrocyclone – cylindroconic hydrocyclone pairs operating in the same way as the suspension are involved in the separation process, which increases the battery capacity.

The industrial applicability of a hydrocyclone battery is proved by an example of a specific design.

Example 1

The solids content in the shared Cretaceous suspension is 10% grade + 0.045 mm. The separation is carried out on one cylindrical diameter of 75 mm and one cylindrical with a diameter of 50 mm of hndrocyclops. Pa hydrocyclope preliminary separation with a diameter of 75 mm, the discharge rate is 60%, the content in it of the class + 0.045 is 0.3%. The output of sand is 40% with a grade of 0.045 mm - 24.55%. Extraction grade + 0.045 mm on a cylindrical pre-separation hydrocyclone is 98.2%. 40% condensed fraction with

with a grade of + 0.045 mi in an amount of 24.5%, it enters through a cilium feed pipe of a Unroconic hydrocyclone a with a diameter of 50 mm with a percentage separation of plums: sands of 60: 40, respectively. The content in the plum of the class + 0.045 mm is 0%, the content in the sands of the class + 0.045 mm is 61.3%, with the extraction of the class + 0.045 mm - 100%. The output of battery sands is 16%.

 2.

The solids content in the shared Cretaceous suspension is 2% grade + 0.045 mm. The separation is carried out on one cylindrical diameter of 75 mm and one cylindrical with a diameter of 50 mm hydrocyclones :. On a preliminary separation hydrocyclone with a diameter of 75 mm, the discharge yield is 60%, the content in it of class + 0.045 is 0%. The sand yield is 40% with a grade of 0.045 mm - 5%. Extraction grade + 0.045 mm on a cylindrical pre-separation hydrocyclone is 100%. A 40% condensed fraction with a grade content of + 0.045 mm in an amount of 5% is fed through the supply side of a cylinder-conical hydrocyclone with a diameter of 50 mm with a separation percentage of drains: sand of 90: 10, respectively. The content in the discharge of the class +0.045 mm is 0%, the content in the sands of the class + 0.045 mm is 50%, with the extraction of the class + 0.045 mm - 100%. The output of battery sands is 4% g.

S.

As can be seen from examples 1 and 2, even on the same hydrocyclone of preliminary division, a high degree of separation is achieved, but the sand yield is up to 40%. Cleaning them using a second hydrocyclone reduces the yield of sand to 4-16%, depending on the grade + 0.045 mm in the initial suspension.

Thus, supplying a battery of hydrocyclones with two paired hydrocyclones: cylindrical and cylindrical with different diameters allows to obtain a high degree of separation of the chalk suspension, that is, to solve the problem.

Claims (2)

1. A hydrocyclone battery for separating a suspension, including a preliminary separation hydrocyclone interconnected with an inlet, sand and drain nozzles and at least one smaller diameter cylindrical hydrocyclone for cleaning, also equipped with a feed, sand and drain nozzles, connected, in turn, with nozzles with a cylindrical collector for a thin fraction and a collector for a thickened fraction, characterized in that it is additionally equipped with an inlet collector for a shared suspension, setting located above the fine fraction collector, while all the collectors are made in the form of coaxial cylindrical tanks with inlet and outlet nozzles and are mounted on top of each other, and the preliminary separation hydrocyclone is made in the form of a vertical cylinder, which is connected by its sand pipe to the supply pipe of a cylindrical-conical hydrocyclone for cleaning, and the latter is connected by its drain pipe to the inlet of an additional collector for a fine fraction in the form of a second drain. 2. The battery according to claim 1, characterized in that it is additionally equipped with at least one cylindrical hydrocyclone, the sand pipe of which is connected to the supply pipe of the corresponding additional cylinder-conical hydrocyclone.