Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B11/00—Feeding, charging, or discharging bowls
  • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B7/00—Elements of centrifuges
  • B04B7/02—Casings; Lids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
  • B04B2001/2041—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with baffles, plates, vanes or discs attached to the conveying screw
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
  • B04B2001/2083—Configuration of liquid outlets

Definitions

• the invention relates to a solid bowl centrifuge, in particular a two- or three-phase solid bowl centrifuge (also called two- or three-phase decanter) according to the preamble of claim 1 and a method for controlling the separation process with such a centrifuge.
• a solid bowl centrifuge in particular a two- or three-phase solid bowl centrifuge (also called two- or three-phase decanter) according to the preamble of claim 1 and a method for controlling the separation process with such a centrifuge.
• a suspension of solids to be processed is clarified with a two-phase decanter.
• a liquid phase and a solid phase are thus drained from the drum. It is known to change the pond depth in the drum during operation.
• “Pond depth” means the radial depth of the liquid layer in the area of the liquid outlet.
• the depth of the pond is traditionally fixed using weir discs.
• the pond depth results from the (overflow) diameter of the built-in weir discs.
• the decanter must be stopped to change the pond depth.
• WO 03/074 185 A1 shows a three-phase decanter with which two liquid phases and one solid phase can be derived from the bowl.
• the outflow volume of the heavier liquid phase can be adjusted with a weir.
• the separation zone the radial zone in which two liquid phases separate in the centrifugal field.
• the invention aims to solve this problem.
• the invention solves this problem with the subject matter of claim 1 .
• a solid bowl worm centrifuge which has a rotor or a rotating system during operation with a rotating drum during operation, which has an inlet for a suspension to be processed in the centrifugal field and a separation space in which a rotating screw is arranged.
• the drum has a solids discharge for discharging a solids phase, preferably in the region of one axial end of the drum and a liquid outlet for discharging at least one liquid phase in the region of the other axial end of the drum.
• the one or more liquid outlets have a device for influencing, in particular for controlling or regulating, the liquid level in the separation chamber, this device having one or more pressure chamber(s) which are connected via a common chamber into which a fluid supply line opens , via which the pressure in the respective pressure chamber can be influenced in order to be able to apply a gas pressure to at least one liquid surface of the liquid phase running off in the respective pressure chamber or also to apply it during operation in order to create a separation zone and/or a pond depth in the drum during operation affect, in particular set controlling or regulating, the respective pressure chamber is formed in the rotor, and in the region of the respective pressure chamber one or more function discs are arranged, with all of these function discs rotating with the rotor during operation.
• the pond depth is in turn adjusted via a pneumatic pressure in the area of the liquid outlet.
• This pressure is applied to the surface of the liquid in a pressure chamber rotating with the drum. Since one or more function discs are arranged in the area of the pressure chamber, with all of these function discs rotating with the rotor during operation, there are no major energy losses due to friction on these discs, unlike on function discs that are stationary during operation and that are immersed in a rotating liquid.
• a gas pressure is a pneumatically acting pressure.
• pressurized air or an inert gas can be used to generate the gas pressure in the respective pressure chamber.
• the pressure chambers can be designed in such a way that they extend into the respective weir openings and are connected to a further common annular pressure chamber and are supplied with gas pressure via this.
• a weir disc or a siphon disc all the function discs on/in the pressure chamber(s) are fastened to the drum or the auger and thus have their speed.
• the energy losses are reduced, which arise in the known constructions because one or more, in particular a stationary siphon disc, is immersed in the liquid rotating at the drum speed.
• the term "functional disk” should not be defined too narrowly.
• Such a disk can be designed as a one-piece or multi-piece circumferential and peripherally closed ring disk, but it can also consist of one or more segments, in particular ring segments, and for example only limit one or more of the entire weir openings or the like provided in the circumferential direction.
• the energy losses are kept particularly low if, according to one variant, the pressure chamber is delimited on all sides only by elements rotating with the rotor during operation.
• the invention is suitable both for two-phase decanters (liquid/solid separation) and for three-phase decanters (liquid/liquid/solid separation), the latter two liquid outlets for two liquid phases of different densities - one have a lighter liquid phase and a heavier liquid phase. Depending on the design, it is then possible to adjust either the pond depth and/or the separation zone.
• the invention can be used in the most varied of types of liquid outlets (free discharge, internal or external impeller, impeller tube) or liquid discharge.
• the possibility of adjusting the pond depth during operation is always an advantage.
• the arrangement of the new functional disks to form the pressure chambers can be implemented cost-effectively.
• the at least one liquid outlet is a weir with one or more Has weir openings and in which the one or more pressure chambers are assigned to the weir.
• first siphon disk which extends from radially inwards outwards into the area of the weir openings, as one of the functional disks is. This delimits a respective first siphon, which is formed between the separation space and the respective weir opening with a downstream first weir disk.
• the fluid supply line has at least two line sections, one of these line sections being formed in the non-rotating area of the solid bowl scroll centrifuge and the other of these line sections or several of these second line sections being formed in the rotor and opens into one or more pressure chambers in the rotor.
• the pressure thus reaches the rotating annular part of the pressure chamber on the drum through a rotary feedthrough with one or more seals and its level can be adjusted during operation.
• the one or more liquid outlets for the light liquid phase is associated with one of the pressure chambers, which are connected to the annular part of the pressure chamber into which the fluid supply line in the rotor opens, and/or that the one or more liquid outlets for the heavy liquid phase is assigned to one of the pressure chambers, which are connected to the annular part of the pressure chamber, into which the fluid supply line in the rotor opens.
• the pond depth and/or the separation zone diameter in the separation space can be easily influenced.
• the control or regulation of the pond depth and/or the separation zone diameter is/are preferably carried out via a control unit of the centrifuge, which is equipped with a corresponding control and/or regulation program.
• the depth of the pond and/or the position of the separation zone is adjusted via pneumatic pressure in the area of the respective liquid outlet.
• This pressure is applied to the surface of the liquid in a chamber rotating with the drum.
• the pressure reaches the rotating chamber on the drum via a seal and can be adjusted during operation.
• This type of pond depth adjustment can be used with both 2-phase and 3-phase decanters.
• the pond depth in the separation space can be adjusted and/or the separation zone in the drum can be easily shifted, which also leads to a change in the liquid level.
• a conversion that would otherwise be required due to changes in the properties of the product can usually be omitted by using the given control range.
• the design effort to create the pressure chambers) is low.
• the overflow for the possibly other phase can be realized, for example, by means of radial discharge pipes which penetrate the drum jacket or drum cover radially outwards.
• the one or more liquid outlets for the lighter liquid phase are assigned one of the pressure chambers, which are connected via a common annular pressure chamber into which a fluid supply line in the rotor opens, and that one or the several liquid outlets for the heavier liquid phases are each assigned a discharge pipe, with which the heavier liquid phase can be discharged from the drum.
• the one or more liquid outlets for the heavier liquid phase is assigned one of the pressure chambers, which are connected via a common annular pressure chamber into which a fluid supply line in the rotor opens, and that the one or more liquid outlets for the lighter liquid phase is assigned a discharge pipe, with which the lighter liquid phase can be derived from the drum.
• This is also structurally good and easy to implement.
• the invention also provides a method for operating a solid bowl worm centrifuge according to one of the claims relating thereto, in which a control gas is passed through a rotary passage into the rotating system and there into one or more pressure chamber(s) rotating during operation.
• the regulation of the separation process in the drum can then include, for example, setting the pressure in the pressure chamber as a manipulated variable.
• the regulation of the separation process in the drum includes changing the speed of the drum as a further manipulated variable.
• the separation process in the drum can be regulated as a function of the concentration in the solid phase or in one or both of the derived liquid phases.
• FIG. 1 shows a schematic sectional view of a portion of a first solid bowl centrifuge according to the invention
• FIG. 2 shows a schematic sectional view of a partial area of a second solid bowl centrifuge according to the invention
• FIG. 3 shows a schematic sectional view of a portion of a third solid bowl centrifuge according to the invention
• FIG. 4 shows a schematic sectional view of a partial area of a fourth solid bowl centrifuge according to the invention
• 5 shows a schematic sectional view of a portion of a fifth solid bowl centrifuge according to the invention
• FIG. 6 shows a schematic sectional view of a portion of a sixth solid bowl centrifuge according to the invention.
• FIG. 7 is a schematic sectional view of the first solid bowl scroll centrifuge according to the present invention.
• Figure 7 shows a first solid bowl scroll centrifuge.
• This representation serves on the one hand to represent a variant of the invention and on the other hand to illustrate the basic principle of a solid bowl centrifuge to give an example of a solid bowl centrifuge in which the invention can be implemented as shown or in another way.
• FIGS. 1 to 6 can also be advantageously implemented in the solid bowl worm centrifuge of FIG.
• a frame 7 which cannot be rotated during operation or is stationary on a foundation or the like, and a rotor R which can be rotated or rotated during operation.
• the rotor R has a rotatable drum 1 with an axis of rotation A that is horizontal here. However, the axis of rotation A can also be oriented differently in space, in particular vertically.
• the rotor R also includes a screw 2 arranged in the drum 1, the axis of rotation of which coincides with the axis of rotation of the drum 1 A.
• the drum 1 has a section 11 that is cylindrical on the inside and outside here and a section 12 that is conical here on the inside and outside and adjoins it axially.
• the cylindrical section 11 is closed off by a drum cover 13 that extends essentially radially.
• the worm 2 here also has a section 21 that is cylindrical at least on the outside and a section 22 that adjoins it axially and is at least conical on the outside. It is arranged inside the drum 1 .
• the drum 1 is rotatable during operation.
• the worm 2 can be rotated during operation.
• the two elements drum 1 and screw 2 are rotated in operation at a different speed to each other.
• One or more appropriate drives such as electric motors and/or gears (not shown here), are used for turning.
• ment M1, M2 for rotating the drum or the worm in shafts W1, W2 fed directly or indirectly via a gear (not shown) rotatably connected to the drum 1 or the worm 2 are connected.
• the worm 2 also has a worm body 23 and a worm helix 24 which extends radially outwards from the body and does not touch the inner wall of the drum.
• a baffle plate can be provided on the screw body 23 towards the conical section of the screw.
• the drive rotates the drum 1 on the one hand and the screw 2 on the other.
• the drum 1 is rotatably mounted at both of its axial ends with one or more drum bearings 17 arranged axially in the direction of the axis of rotation, in particular rotatably mounted on the frame.
• the worm 2 is also rotatably mounted on the frame 7 at both of its axial ends with one or more worm bearings 25 arranged axially in the direction of the axis of rotation.
• one of the worm bearings 25 - at the end of the cylindrical section 22 of the worm 2 - is shown.
• the drum 1 and/or the screw 2 can also be mounted on one side, in particular when the axis of rotation A (not shown) is oriented vertically.
• Each of the bearings 17, 25 can each consist of one or more individual bearings, which are then arranged axially directly next to one another, so that they can each be considered functionally as an individual bearing.
• the bearings 17, 25 can also be in the form of bearings of a wide variety of types, such as roller bearings--in particular ceramic bearings, hybrid ceramic bearings, magnetic bearings or plain bearings.
• the drum bearing or bearings 17 are arranged between the drum 1 and the frame 7 or a part connected to the frame 7 so that the drum 1 can be rotated relative to the frame 7 .
• the drum bearings 17 are preferably arranged radially between the drum 1 and the frame 7 or a part connected to the frame.
• one worm bearing 25 can be arranged, for example, between the drum cover 13 and the frame 7 .
• the drum cover 13 has a section 131 that extends essentially radially and two axial sections 132, 133 that extend on opposite sides—here away from the inner end of the section 131—(see FIG. 1).
• the axial sections 132, 133 can each be used for arranging one of the drum bearings 17 or the worm bearings 25 and can be used on one or more collars or the like for arranging further elements such as functional disks.
• the drum cover 13 rotates with the drum 1.
• a feed pipe 3 running here concentrically to the axis of rotation, which opens into a distributor 4 through which a suspension Su to be processed can be directed radially into a separation space 5 in the drum 1 .
• the inlet pipe 4 is firmly connected to the frame 7 .
• the inlet pipe 4 may be led into the drum 1 either from the side of the cylindrical drum portion 11 or it may be led into the drum 1 from the side of the conical drum portion 12 .
• the drum 1 is designed as a solid wall drum.
• at least one incoming suspension Su is clarified from solids S and the liquid portion clarified from solids is either discharged as a liquid phase L or optionally separated into at least two liquid phases LI and Lh of different densities.
• the solid phase or the solids S are transported by the screw 2 in the direction of a solids discharge 14 in the conical section 12 of the drum 1 and are ejected from the drum 1 there.
• the at least one liquid phase L thus exits the liquid outlet 15 through the drum cover 13 .
• one or more liquid outlets 15, 16 At the end of the cylindrical section 11 facing the drum cover 13 and/or at the drum cover 13, one or more liquid outlets 15, 16 . These can each be provided once or multiple times.
• the drum cover 13 can be provided with a ring-like weir opening - possibly except for spokes (not shown here) between an inner and an outer section of the drum cover 13 - or two or more weir openings 151, preferably distributed circumferentially on a common radius, which pass through it axially .
• the weir openings can be circular or, for example, arcuate.
• the or the weir openings 151 is a device 6 for influencing, in particular for controlling or regulating the liquid level in the separation chamber 5 - assigned here via a pneumatic pressure, which acts on one or more liquid surfaces of the liquid phase L in the pressure chamber.
• FIG. 1 shows a first exemplary embodiment of the possible configuration of the area, in particular of the drum cover 13 and the—here only one—type of liquid outlet 15 of the solid-bowl scroll centrifuge, as can be used in the centrifuge of FIG.
• the weir opening(s) 151 in FIG. 1 is also assigned the device 6 for influencing, in particular for controlling or regulating—the liquid level—and possibly a separation zone—in the separation chamber 5, as shown in FIG.
• This has a fluid supply line 61, with which a fluid, in particular a gas, can be conducted from a fluid reservoir (not shown) or the like outside the rotor into a respective pressure chamber 62 in the area of the respective liquid outlet 15 in order to generate gas pressure there , which acts on the respective liquid surface.
• the pressure chamber 62 has a first pressure chamber section 62a within the respective weir openings 151 and a pressure chamber section 62b adjoining it axially outwards, here circumferentially ring-shaped, which runs circumferentially inside on the side of the second siphon disk 1513 facing the weir openings 151 and radially can be formed on the outside of the ring socket 1517 and connects the first pressure chamber sections 62a.
• the fluid supply line 61 can preferably open into the circumferential annular pressure chamber section 62b, since the entire pressure chamber 62 can be acted upon with gas under pressure with a single supply line.
• the gas pressure in the respective pressure chamber 62 is adjusted here and according to the other figures, into which a gas is introduced that passes through a rotary feedthrough into the rotor of the drum and there into the respective pressure chamber is conducted, which is preferably limited only by rotating elements during operation, which - as already explained - is favorable from an energetic point of view.
• a gas pressure acts on at least one or more liquid surfaces of the liquid phase running through them at the liquid outlet.
• the respective liquid outlet 15 (or in other figures alternatively or additionally to the respective liquid outlet 16 for the one liquid phase here) are assigned several function disks, here four function disks 1511, 1512, 1513, 1514.
• a functional disc within the meaning of this application is a circumferential or possibly also segment-like disc or a similar element which has a boundary edge on its inner radius or its outer radius, preferably circumferential or provided in segments, which can and preferably also form an overflow edge for a liquid forms in the company.
• the functional disks 1511, 1512, 1513, 1514 of all the exemplary embodiments are each designed as disks that can be rotated and rotated with the rotor during operation. During the centrifugal processing of a suspension, they rotate with the rotor and in particular with the drum 1 or with the screw 2.
• the function disks 1511 , 1512 , 1513 , 1514 are designed as disks rotating with the drum 1 .
• the differential speeds between drum 1 and worm 2 during operation are almost negligible with regard to any energy losses due to friction in the liquid (splashing losses), since the differential speeds are relatively small.
• the term functional disks 1511, 1512, 1513, 1514 should not be defined too narrowly. Such can be designed as a rotating ring disk, but it can also consist of one or more segments, in particular special ring segments exist and each only be provided in the area of the respective weir openings.
• a first of the function disks 1511 is assigned to the one circumferential or the several circumferentially distributed weir openings 151 in the drum cover 13 on its side facing the drum interior or the separation chamber or upstream in the direction of flow.
• This can also be referred to as the inner siphon disk 1511 and it partially covers the weir openings 115 radially outwards, starting from their inner diameter.
• a gap 15111 remains between the outer diameter D1 of the inner siphon disk 1511 and the largest or (outer) diameter of the weir openings 151 , through which liquid can overflow/overflow from the separation chamber 5 into the actual weir opening 151 .
• the inner or first siphon disc 1511 can be connected to the drum cover 13 in a rotationally fixed manner. It can, for example, be supported axially on the inside on a radial collar or directly on the radial section of the drum cover 13 and preferably fixed in a rotationally fixed manner. It can consist of a circumferential ring or of several individual segment elements which, for example, are assigned to the individual weir openings 151, between which gaps can also be formed.
• a type of first siphon 1510 is formed here in the area of each weir opening 151 on the inner siphon disk 1511 . One side of the respective first siphon 1510 is oriented towards the separation space and the other side is oriented towards the respective weir opening 151 and is delimited on the outside of the weir opening 151 by a first weir disk 1512 .
• a type of second siphon Downstream of the liquid outlet 15 with the inner siphon disk 1511 is a type of second siphon, which can be designed as a ring siphon 1516 provided in sections, for example in the area of individual weir openings, or circumferentially.
• This ring siphon 1516 has two function disks 1512 and 1514 - also called weir disks - which extend radially from the outside inwards to an inner diameter D2 (inner weir disk 1512) or D4 (outer weir disk 1514) and which extend at their outer radial ends are connected to one another by an axial wall 1515, so that between the weir plates 1512 and 1514 and the radially outer axial wall, a U-shaped cross-section annular chamber or annular cup 1517 is formed in sections or segments or all around, which is open towards the inside.
• This annular socket 1517 here directly adjoins the side of the drum cover facing away from the separating space 13 on.
• a third function disc 1513 which is provided in sections or continuously and extends radially from the inside outwards, protrudes into the ring socket 1517, which is open towards the inside. In its inner region, for example, it can bear against a collar of the outer axial section of the drum cover 13 .
• the inner weir plate 1512 is arranged on the outside of the drum cover 13 facing away from the separation chamber 5, preferably directly on the drum cover 13, which in turn can be non-rotatably connected to the drum cover 13.
• This inner weir disk 1512 can partially cover the respective weir openings 151 radially from the outside inward, specifically up to an inner diameter D2, with the following preferably applying: D2 ⁇ D5 (inner water level in the annular siphon 1516).
• the liquid or liquid phase flowing out of the separation chamber via the first siphon disc 1511 through the gap 15111 fills the outer area of the actual weir opening 151 up to a diameter D2 and then runs via the inner weir disc 1512 and via the pressure chamber 62 into the annular siphon 1516. From this the liquid then runs over the outer weir disc 1514 from the rotating system.
• the fluid supply line 61 protrudes into the pressure chamber 62 formed between the inner siphon disk 1511 and the outer siphon disk 1513 .
• the fluid supply line is initially formed in a first section 611 in the stationary system, for example in the frame 7 and/or in the feed pipe 4 .
• the fluid supply line 61 also has at least a second section 612 adjoining it in the rotating system.
• a rotary feedthrough 63 for transferring fluid, in particular gas, preferably air, from the stationary system into the rotating system of the solid bowl worm centrifuge.
• the rotary passage 63 can be formed in an annular gap 64 which can be formed radially between the rotating system and the non-rotating system, for example between the drum cover 13 rotating during operation and the feed pipe 3 stationary during operation.
• the rotary feedthrough 63 can be delimited radially in the annular gap by two seals—for example mechanical seals 65, 66—arranged in the annular gap 64 and spaced apart axially. This delimits an annular chamber into which the first line section 611 opens into the rotary feedthrough 63 and into which the respective second line section 612 also opens, which extends into the respective pressure chamber 62 and opens into it, preferably radially on the inside.
• Gas can be fed into the pressure chamber 62 in this way.
• the pressure in the respective pressure chamber 62 delimited on the inside by the drum cover 13 and delimited radially by the inner and outer siphon disks 1511, 1513 and delimited radially on the outside by fluid, can be varied during operation.
• the construction of the rotary feedthrough is preferably to be designed in such a way that a pressure of up to 3 bar can be controlled.
• Each of the weir openings 151 can be associated with one of the pressure chamber(s) 62 (FIG. 1) or only a part of the weir openings 151, 15T, which will be explained in more detail below.
• an inner diameter Dt forms in the separation space 5, up to which the drum 1 extends radially inwards fills with liquid.
• This inner diameter Dt is also referred to as the pond depth.
• the clarified liquid phase L passes through the inner siphon disk 1511 with the outer diameter D1 (D1 >Dt) and the first siphon 1510 into the pressure chamber 62 and then into the second ring siphon 1516, from which it flows out of the rotating system or here the drum 1 It fills this annular siphon radially inwards in the area towards the drum cover 13 up to a diameter D5.
• the pool depth Dt in the drum 1 can then be influenced or controlled or regulated.
• the liquid phase L is passed through the one or more pressure chamber(s) 62 in a two-phase decanter for separating two phases (solid/liquid).
• the pressure imposed by the gas in this respective pressure chamber 62 influences the pond depth Dt of the liquid phase in the drum 1.
• the pond depth increases at a higher gas pressure, and the pond depth decreases as the pressure decreases.
• a row of circumferentially distributed weir openings 151 - e.g. every second or every third weir opening 15T - be designed in such a way that they do not completely penetrate the drum cover 13 from the side of the separation space 5, but are designed like a blind hole.
• the end of a discharge pipe 161 can be located radially inwards in this blind hole 15T, which can pass through the drum cover 13 radially outwards.
• This drain tube terminates internally at a diameter Dr. In this way, a discharge chamber 163 is formed with the aid of the blind hole.
• the pool depth Dt of the two liquid phases L in the drum 1 and the separation diameter Dz are influenced as a function of the pressure imposed by the gas in the respective pressure chamber 161 . With a higher gas pressure, the pond depth increases and the separation diameter increases, with decreasing pressure, the pond depth and the separation diameter decrease.
• a decanter for separating the phases solid/liquid/liquid
• the heavier of the two liquid phases Lh is guided through circumferentially distributed (here collar-like) separating weirs 162 through a respective pressure chamber 62 (Fig. 3) and the lighter liquid phase drained through blind holes 15T axially open on one side and drain pipes 161 at a diameter Dr (which is here equal to pond depth).
• Dr which is here equal to pond depth
• the separation diameter Dz of the two liquid phases in the drum is influenced. With a higher gas pressure, the cutting diameter Dz reduces, with decreasing pressure, the cutting diameter Dz increases.
• the pond depth Dt is independent of the pressure here.
• the lighter of the two phases LI is freely discharged via one or more overflow weirs 1518 .
• An overflow weir 1518 fixed to the drum cover 13 can thus be connected downstream of one or more circumferentially distributed weir openings 151 . This forms a functional disc.
• the pond depth Dt in the separation space 5 is fixed.
• blind hole-like weir openings 15T can in turn be preceded by a type of separating weir 162, via which the heavier liquid phase Lh flows into the area of this respective blind hole 15T with one of the discharge pipes 161.
• the withdrawal of the heavier liquid phase Lh can in turn take place through one of the discharge pipes 161 from a discharge chamber 163 in the blind hole 15T at a radius Dr.
• a pressure chamber 62' is connected upstream of this discharge chamber 163 by means of several function discs 1514, 1512 and the separating weir 162 as a function disc, which pressure chamber 62' can be provided in the area of this respective liquid outlet.
• One in each case again opens into the pressure chamber 62' Lead 61, the second section 612 behind a rotary feedthrough 63 in the rotating system - here in the drum 1 - runs.
• the pressure chamber 62' can in turn be delimited by discs rotating during operation (separator weir 162, inner weir disc 1512 and outer siphon disc 1513) and form a type of siphon in the area of this chamber 62'.
• the heavier of the two liquid phases Lh is thus conducted via the separating weir 162 and then through the respective pressure chamber 62' and discharged from the respective discharge chamber 163 in the respective blind hole 15T via one of the discharge pipes 161 in each case.
• the separation diameter Dz of the two liquid phases LI, Lh in the drum 1 is influenced as a function of the pressure imposed by the gas in the pressure chamber 62'. With a higher gas pressure, the cutting diameter Dz reduces, with decreasing pressure, the cutting diameter Dz increases.
• the pond depth Dt is independent of the gas pressure.
• the heavier of the two liquid phases Lh is discharged via a weir disk 1518 of a passage opening 151 .
• a separating weir 162 is connected upstream of the passage opening 151 .
• the lighter of the two liquid phases is conducted at the discharge chamber 163 or here at the blind hole 15T through a pressure chamber 62' with the gas supply line 612 (FIG. 5) and discharged via one of the discharge pipes 161.
• Both the pond depth Dt of the two liquid phases LI, Lh in the drum 1 and the separation diameter Dz are influenced as a function of the pressure imposed by the gas in the respective pressure chamber 62'. With a higher gas pressure, the pond depth Dt and the separation diameter Dz increase, with decreasing pressure the pond depth Dt and the separation diameter Dz decrease.
• both liquid phases are conducted through two different pressure chambers 62, 62' (FIG. 6).
• the lighter of the two liquid phases LI is discharged as in Fig. 1, the heavier liquid phase Lh, however, as in Fig. 4 via a discharge tion tube 161 derived from a chamber 63, which is preceded by a pressure chamber 62'.
• At least two pressure chambers 62, 62' are provided for the discharge of the light as well as the heavy liquid phases LI, Lh. These are separated by separate fluid lines 6111, 6112; 6121, 6122 with two rotary feedthroughs 631, 632 here. In this way, different gas pressures can be set in the chambers 62, 62'.
• the pressure could then be supplied via a fluid supply line 61 with a line section 611 in the frame 7, a rotary feedthrough 63 and line section(s) 612 in the worm 2 into a pressure chamber 62 in the worm
• Drum cover 13 radially extending portion 131 axially extending portions 132, 133

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• Centrifugal Separators (AREA)

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Citations (6)

• 2022
  • 2022-01-11 DE DE102022100511.9A patent/DE102022100511A1/de active Pending
• 2023
  • 2023-01-05 JP JP2024540978A patent/JP2025500633A/ja active Pending
  • 2023-01-05 EP EP23700443.7A patent/EP4463268A1/de active Pending
  • 2023-01-05 US US18/727,744 patent/US20250099982A1/en active Pending
  • 2023-01-05 AU AU2023207411A patent/AU2023207411B2/en active Active
  • 2023-01-05 KR KR1020247021759A patent/KR20240134875A/ko active Pending
  • 2023-01-05 CA CA3239855A patent/CA3239855A1/en active Pending
  • 2023-01-05 CN CN202380016897.4A patent/CN118524893A/zh active Pending
  • 2023-01-05 WO PCT/EP2023/050173 patent/WO2023135051A1/de not_active Ceased

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