RU2124949C1 - Liquid nonhomogeneous medium separator - Google Patents

Abstract

FIELD: equipment for separating liquid nonhomogeneous media. SUBSTANCE: separator has housing with closure and drum positioned within housing. Drum has shell with cover and base. Partition wall is positioned in lower part of base above its bottom to define fraction discharge zone. Delivery disk for discharging heavy fraction is positioned in fraction discharge zone. Hollow shaft is provided with axial channel for discharging light fraction. Plate holder with pack of plates and device for supplying separated liquid medium are mounted in drum. Separator has device for filtering medium supplied for separation. Filtering device has annular chamber positioned in housing and provided with filtrate discharge branch pipe. Inner wall of annular chamber is formed as filtering member which defines, together with drum shell, through channel for filtering and supplying of medium into pack of plates from side adjacent to slurry space. Filter mounted below partition wall of base is formed as hollow disk with axial filtrate discharge channel adapted for filtering heavy fraction and portion of light fraction with finely dispersed solid phase. Throttles are positioned in gaps between plates of pack of plates in drum. EFFECT: increased separating efficiency and enhanced reliability in operation. 2 cl, 2 dwg

Description

 The invention relates to technological equipment intended for the separation of inhomogeneous liquid media, for example, suspensions and emulsions, into their constituent fractions in the field of action of centrifugal (gravitational) forces and can be used in food, microbiological, petrochemical, pharmaceutical, medical and other industries.

 A known separator for separating liquid inhomogeneous media, including a drum with a bottom, a tray holder and a package of conical plates, a device for supplying slurry and a device for unloading the concentrate, the tray holder is made with a conical flange forming an annular chamber with a drum bottom for collecting concentrate, and a device for its discharge from the separator is made in the form of a discharge disk mounted in an annular chamber (SU 485774, class B 04 B 11/02, 1975).

 A disadvantage of the known separator is that an increase in its performance and separating ability is achieved by increasing the energy and metal consumption of the separator, its cost.

 The closest technical solution to the proposed one is a separator for separating inhomogeneous liquid media, including a housing with a lid, a drum placed in it on a hollow shaft, consisting of a shell with a lid and a base, in the lower part of which there is a partition forming an area for the removal of separated fractions, a pressure disk placed therein for outputting a heavy fraction and a channel in the hollow shaft for discharging a light fraction, a plate holder with a package of plates, means for supplying a shared liquid medium mounted on the roofs e housing and drum drive (SU 1346256, cl. B 04 B 01/08, 1987).

 The known separator divides the liquid medium into three fractions, one of which is gaseous.

 The separator cannot separate the liquid medium into a larger number of fractions, cannot ensure their filtration.

 The technical result of the invention is to increase the performance and separating ability of the separator, to increase the number of fractions (in particular, up to four) obtained by combining the centrifugation and filtration of a heterogeneous liquid medium.

 To achieve this result, the proposed separator for separating inhomogeneous liquid media, including a housing with a lid, a drum placed in it on a hollow shaft, consisting of a shell with a lid and a base, in the lower part of which a partition is formed above its bottom, forming a zone for the separation of separated fractions, located on it a pressure disk for outputting a heavy fraction and a channel in the hollow shaft for discharging a light fraction, a plate holder with a package of plates, means for supplying a shared liquid medium mounted on the housing cover, and the drum drive is equipped with a filtering device for separating a liquid inhomogeneous medium in the form of an annular chamber located in the housing with a filtrate outlet pipe, the inner wall of which is a filter element and forms a flowing annular channel with a drum shell for filtering and supplying a liquid medium to the plate pack from the slurry space. Under the partition of the base there is a filter in the form of a hollow disk with channels for draining the filtrate, control filtration of the finely divided solid phase of the heavy and part of the light fraction. Inductors should be located in the inter-plate gaps of the plate package to offset the distribution profile of the liquid flow velocity over the flow cross section and excitation in a thin near-wall layer of hydraulic lifting force.

 In FIG. 1 is a schematic longitudinal sectional view of a separator; figure 2 - plate with a throttle.

 The separator for separating liquid inhomogeneous media includes a cylindrical body 1 with a cover 2, a drum 3 located in it, consisting of a shell 4 with a cover 5 and a base 6, in the lower part of which a partition 8 is fixed above its bottom 7, forming a fraction removal zone, located in a pressure disk 9 for outputting a heavy fraction and a channel 10 in the hollow shaft 11 for discharging a light fraction, a plate holder 12 with a package of conical plates 13, means for supplying a shared liquid medium containing a pressure chamber 14 with an inlet pipe 15 and untwisting and ribs 16, mounted on the drum cover 5, and means for filtering that enters the medium separation in the form of an annular chamber 17 located in the housing with a filtrate outlet pipe 18, the inner wall of which is a filter element 19 and forms a flow annular channel 20 with the drum shell 4 for filtering and supplying the medium to the package of plates from the side of the slurry space 21. Under the partition 8 of the base 6 of the drum, a filter 22 with channels 23 of the filtrate outlet is installed, which serves to filter the finely dispersed solid phase heavy and parts of the light fraction and made in the form of a hollow disk having a filter end 24 and side 25 surface. The partition 8 is provided with openings 29 for the passage of the light fraction into the axial channel 10, openings 30 for supplying the finely dispersed phase to the filter element 24 and openings 31 for the passage of the heavy fraction concentrate from the slurry space 21 to the pressure disk 9.

 The shell 4 of the drum and the filter element 19 of the annular chamber 17 are cylindrical and can be made conical or spherical to increase the filtering surface.

 The conical plates 13 installed in the separator drum (Fig. 1) are equipped with a throttle 26 made in the form of a flat washer rigidly connected to the upper part of the plate and forming horizontal channels 36 and vertical 28 with it for passing the light fraction to the axis of rotation and channels 27 for the passage of the finely divided phase of the heavy fraction.

 In the lower part of the separator housing 1 there is a pipe 32 for draining the filtrate II from the filter 22, a pipe 32 for draining the heavy fraction from the axial channel 10.

 The drum drive includes a hollow shaft 11 mounted in the bearing bearings 35, a belt drive and an electric motor (not shown in the drawing).

 The separator works as follows.

 A heterogeneous liquid medium, for example milk, enters the pressure chamber 14 through the inlet pipe 15 and is directed through the flowing annular channel 20 through the flowing annular channel 20 into the space between the drum shell 4 and the filter element 19. A part of the liquid medium passes through the filter element 19 into the filtrate receiving housing 17 and through the pipe 18 is discharged from the separator (first filtrate). The technological effect of the separation of the liquid medium is achieved by combining the processes of separation and filtration in space by coaxially located surfaces 4 and 19, one of which (filter 19) is fixed, and the other 4 rotates, exciting rotation vortices in a thin layer that continuously free the filter surface from particles of a dispersed phase detained by it. The other part of the liquid medium that did not pass through the filter together with the precipitate of particles of the dispersed phase washed away by the vortex of rotation from the surface of the filter element 19, from the channel 20 enters the sludge space 21 of the base 6 of the drum. The heavy fraction under the action of centrifugal force is thrown to the periphery of the slurry space of the base of the drum and through channels 31 enters the pressure disk 9, with which the concentrate is removed from the drum through the pipe 33. Part of the liquid medium from the inter-flow stream containing the finely divided phase of the heavy fraction and light fraction, containing the fatty phase, enters the package of plates 13 having a throttle 26, with the help of which a velocity circulation field and hydraulic lifting force are excited in a thin parietal layer. In each inter-plate space, under the action of a centrifugal separating effect and hydraulic lifting force, the liquid medium is stratified into a stream of light (fat) and heavy (finely dispersed) fractions. The light fraction (fat) from the inter-tray space through the channels 28 through the holes 29 enters the axial channel 10 and through the pipe 34 is removed from the drum. The finely dispersed phase of the heavy fraction from the inter-tray space through the channels 27 through the hole 30 in the partition 8 enters the end surface 24 of the filter 22. The filtrate from the hollow space of the filter 22 passes through the channels 23 through the pipe 32 from the separator drum. The filtered precipitate of a finely divided solid phase of a heavy fraction under the action of a vortex lifting force arising in the space between the fixed surface 24 of the filter 22 and the surface of the rotating partition 8 is continuously "removed" from the end surface of the filter 22, rises to the rotating partition 8, from the surface of which under the action of centrifugal forces are thrown to the periphery of the base 6 of the drum, from where the pressure disk 9 is sucked out and through the pipe 33 is removed from the separator.

 The use of the invention allows to increase the productivity and separating ability of the separator, to reduce its dimensions, metal consumption, energy consumption for the process and the cost of the separator.

Claims (2)

 1. A separator for separating liquid inhomogeneous media, comprising a housing with a cover, a drum placed in it on a hollow shaft, consisting of a shell with a cover and a base, in the lower part of which a partition is strengthened above its bottom, forming a fraction removal zone, a pressure disk placed in it for outputting a heavy fraction and an axial channel in a hollow shaft for outputting a light fraction, a plate holder with a package of plates, means for supplying a shared liquid medium and a drum drive, characterized in that it is provided with a filter for entering it to the separation of the liquid medium in the form of an annular chamber located in a fixed mounted housing with a filtrate outlet pipe, the inner wall of which is a filter element and forms a flow channel with a drum shell for filtering and supplying the shared medium to the plate package from the side of the slurry space, while under the partition a base is installed a filter in the form of a hollow disk with a filtrate removal channel for filtering the heavy fraction and part of the light fraction with a finely divided solid phase.  2. The separator according to claim 1, characterized in that chokes are located in the inter-plate gaps of the plate package.

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