WO2014135502A1 - Séparateur solide-liquide - Google Patents

Séparateur solide-liquide Download PDF

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Publication number
WO2014135502A1
WO2014135502A1 PCT/EP2014/054101 EP2014054101W WO2014135502A1 WO 2014135502 A1 WO2014135502 A1 WO 2014135502A1 EP 2014054101 W EP2014054101 W EP 2014054101W WO 2014135502 A1 WO2014135502 A1 WO 2014135502A1
Authority
WO
WIPO (PCT)
Prior art keywords
solids
surface structure
solid
scavenging
rotation
Prior art date
Application number
PCT/EP2014/054101
Other languages
German (de)
English (en)
Inventor
Ulrich Braun
Original Assignee
Ulrich Braun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ulrich Braun filed Critical Ulrich Braun
Publication of WO2014135502A1 publication Critical patent/WO2014135502A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/74—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force

Definitions

  • raw black water, and preferably animal fattening effluents present very large problems with solids separation, as the suspended solids are very volatile mechanically - a simple pump crushes the solids such that they are difficult to separate by conventional separation techniques.
  • non-separated tissue paper such as toilet paper as a cellulose in wastewater treatment systems is almost biologically inert, thus clogging fixed bed reactors and, when crushed into individual fibers, tend to spontaneously clog, ultimately causing membrane pores to clog.
  • An unsolved problem of the treatment of black water is the insufficient selectivity of the separation of toilet paper.
  • Solid / liquid mixtures are a common phenomenon in industry and settlement economy - correspondingly diverse are the methods for solid / liquid separation. Often some separation processes are suitable for one mixture (eg sieve drums for granulate-containing waters), for others, however, completely unsuitable (sieve drums for greasy waters). Thus, many different methods of solid / liquid separation must be used, although it is in itself only a single process step.
  • the solids-containing liquid medium is advantageously transferred or separated into a solids-enriched medium and into a solids-depleted liquid.
  • it finds here at least partially (Ab) separation or transfer of the solid-containing, liquid medium in 1) low-solids liquid medium or solids-depleted phase or solids-depleted liquid, and
  • the process expediently comprises the rotation of the solids-scavenging surface structure, in particular in such a way that the solids-enriched medium is separated from the solids-scavenging surface structure by centrifugal force.
  • the solids-scavenging surface structure may, for example, rotate below the solids-separating minimum rotational speed. In a further embodiment, the solids-scavenging surface structure does not rotate during loading during separation and / or during transfer.
  • the Feststoffstoffabtumblede minimum speed is here preferably the speed at which at least a part, preferably a large part of the (separated) separated or transferred solids-enriched medium from the solids scavenging surface structure again dissolves.
  • the rotation of the solids-collecting surface structure preferably takes place above the solids-separating minimum rotational speed, which preferably depends on the centrifugal force.
  • the method according to the invention makes use, in particular, of the solids retention of the principle of a solids-scavenging surface structure, preferably similar to a brush and / or particularly preferably of membranes, the pore sizes of the membranes expediently being all sizes below 0.1 mm, preferably below 0.1 ⁇ ⁇ ⁇ , further preferably below 100 nm, and more preferably below 5 nm may comprise, associated with the cleaning of the solids-collecting surface structure by mechanical forces, particularly preferably by centrifugal force and / or pressure. It is therefore particularly preferably a rotary body which is equipped with a solids-scavenging surface structure on which the medium to be separated (preferably aqueous media, particularly preferably black water) is applied.
  • the medium to be separated preferably aqueous media, particularly preferably black water
  • the liquid phase can seep through the solid-matter-intercepting surface structure as far as possible free of solids, or be sucked off and discharged via a collecting funnel, while the solids are retained predominantly by the solids-scavenging surface structure.
  • the method can also be carried out without moving parts.
  • the solids can be intermittently removed by means of a jerky relief pressure from the solids-trapping surface structure, while the solids-depleted liquid can be vacuumed alternately by means of negative pressure through the solids-collecting surface structure.
  • a pressure surge is used, in particular after the filtration process, which is designed in terms of size and arrangement such that the solids-enriched medium due to the pressure surge, possibly in combination with the rotation of the solids scavenging surface structure of the solids-collecting surface structure is separated.
  • the device and / or the method can be designed such that, for example, at least during the charging, a negative pressure in the device at least partially sucks the solids-depleted liquid.
  • the solids-collecting surface structure can be easily dismantled and re-assembled, for example by means of one or more clip closures and / or latching means.
  • the solids-scavenging surface structure can be adapted, optimized and installed to special requirements of the solid / liquid mixture. So are you brush-like surface structures are better for retaining fibers, while fir-tree like surface structures are more suitable for retaining granular solids. Thus, it is a device for solid / liquid separation, which can be adjusted and used optimally for the most diverse requirements.
  • a filtration device preferably an ultrafiltration or microfiltration membrane, is provided below or in lieu of the solids scavenging surface structure, with very small solids permeating through the solids scavenging surface structure can be kept.
  • this filtration device as well as the solids-scavenging surface structure - freed by centrifugal force and / or by pressure against the flow or suction again from the retained solids.
  • the filtration device is mounted below the solids-collecting surface structure on a separate rotary body, which preferably can rotate separately or be pressurized against the direction of flow.
  • the filtration device below the solids-collecting surface structure during the solid / liquid separation phase on the collecting funnel and is firmly sucked by negative pressure, while it has a distance to the collecting funnel during the rotation phase , In a further, particularly preferred embodiment of the method according to the invention and / or the device according to the invention, this distance is caused by the centrifugal forces during the rotation.
  • the process according to the invention is thus a process for the separation of suspended and / or unsuspended solids having the following characteristics:
  • Controllable and / or controllable process for the separation of solids from a solids-containing, liquid medium comprising the following steps:
  • step (b.iv) a regular, and / or controllable rest phase of the feed according to step (a) is inserted.
  • the device disclosed here for separating solids from a solids-containing, liquid medium comprises, for example, the following devices:
  • the device according to the invention comprises one or more devices for the separation of solids from liquid media with the following features.
  • Controllable and / or controllable device for the separation of solids from a solids-containing, liquid medium comprising the following devices:
  • Device according to item 1 or 2, wherein the separation of the solids-enriched phase is operated continuously by one or more devices operated batchwise.
  • (a, i) is a regulation and / or controllable device for the quiescent phase during which the solid scavenging surface structure is not charged according to device (a).
  • step (a.ii) a regular, and / or controllable rest phase of the feed according to step (a) is inserted.
  • steps (c.ii) are pushed with a preferably rotating device for further removal.
  • Device according to one of the preceding points, wherein the direction of rotation of the respective steps (c) and (c.ii) can be opposite for themselves, and / or in the sequence.
  • steps (c) and (c.ii) are pushed with a preferably rotating device for further removal.
  • Fig. 1 shows schematically the individual steps of the method for separating
  • Fig. 2a is a sectional view taken along the line A - B of Figure 2b, and
  • Fig. 2b is a sectional view taken along the line C - D of Figure 2a.
  • Fig. 1 describes the inventive method.
  • Reference numeral 1 shows the charge of the solid-scavenging surface structure of the method according to the invention for FFT.
  • Reference numeral 2 shows the separation of the solids-depleted liquid, preferably also by permeation with or without negative pressure.
  • Numeral 3 2 eigt the feed stop after the solids scavenging surface structure of the process according to the invention for FFT is loaded with solids and the remaining solids depleted liquid or phase seep through, preferably sucked off and can flow off.
  • the reference numeral 4 shows the subsequent rotation of the solid scavenging surface structure, especially after the vacuum has been released.
  • Reference numeral 5 shows the rotation of the solid scavenging surface structure without a (controlled or controlled) feed stop, especially during a time in which preferably no inflow of a solid / liquid mixture takes place.
  • the reference numeral 6 shows the separation of the solids from the solids scavenging surface structure, particularly preferably by centrifugal force.
  • the separation of the intercepted solids and / or individual substances can also be effected by detachment by means of chemical and / or physical processes.
  • Reference numeral 7 shows the rotation stop of the solid-scavenging surface structure after the solids have been spun off, and reference numeral 8 shows the repetition of the process steps 1 to 7.
  • a filtration device is integrated into the solids scavenging surface structure.
  • the filtration device may also be constructed and operated separately from the solids scavenging surface structure in other embodiments.
  • the reference numeral 1 shows the device 1 for feeding the solids-collecting surface structure 3 of the inventive method for FFT with the inlet pipe 1, and the preferably round inlet manifold 1a with overflow edge 1b.
  • the inlet pipe 1 Through the inlet pipe 1, the solids-containing liquid medium enters the inlet manifold 1a, over the edge 1b it finally flows into the separation space.
  • the diameter of the intake manifold 1a preferably depends on the design of the rotary body 4 and determines the minimum centrifugal force for removing or separating the solids, in addition to the rotational speed of the rotary body itself.
  • Reference numeral 2 shows a (head) distributor 2. Such a distributor 2 may be provided above and in particular on a rotatable and preferably round body. The distributor 2 serves in particular to at least partially distribute the solids-containing liquid medium.
  • Reference numeral 3 shows the solid scavenging surface structure 3 of the device in a particularly preferred brush-like structure. At least a substantial portion, preferably a majority, of solids or even all solids will remain on the solids scavenging surface structure 3. Thus, the solids, or at least a substantial part or a majority thereof, are separated from the liquid medium. The separated liquid medium is referred to as solids depleted liquid or low solids liquid. The solids depleted liquid may conveniently seep through and drain through the solids scavenging surface structure.
  • the rotary body may not be round but polygonal in a particularly preferred embodiment.
  • the solid-scavenging surface structure 3 is preferably an adaptive variable of the device.
  • other chemical and / or physical and / or biological properties of certain surface materials eg lipophilic surfaces in the separation of fats or oils
  • Nanocoatings are also conceivable here, as well as biological receptors (eg antibodies) for the isolation of certain substances.
  • the reference numeral 4 shows the rotary body 4 rotatable here, on which the solid-matter-intercepting surface structure 3 can be fastened.
  • the configuration of the geometry of the rotary body 4 as well as the separation forces necessary to detach the trapped solids determine its minimum speed and / or maximum speed at least. Lower speeds can also be used to sort separable solids.
  • the (rotary) body can also extend in a straight line, preferably in the shape of a truncated cone, downwards, or flatten outwards with one or more corners. In this case, the increasing flattening of the rotary body 4 is selectively used down.
  • the centrifugal force F Z f necessary for the separation of the solids provided for the separation is calculated from the mass of the smallest particle m to be separated off, the web speed v and the radius of curvature of the web H of the rotating body: v 2
  • the necessary centrifugal force F Zf is calculated, since the centrifugal force must exceed the specific adhesive force in order to separate the solid. From the necessary centrifugal force, in turn, the necessary rotational speed i u of the rotary body 4 then results, as a function of the respective radius r of the rotary body, from the formula:
  • solids scavenging surface structure 3 may be utilized to increase the adhesive forces for these solids such that the separation of other intercepted solids concentrates the solids intended for isolation on the solids scavenging surface structures.
  • the reference numeral 5 shows one of the openings 5 of the rotary body 4, through which the solids-depleted phase can flow or be sucked into the inner side of the rotary body 4, whereby the openings 5 can particularly preferably also be pores of a membrane.
  • the membrane surface does not have to be equal to the surface of the solid-matter-intercepting surface structure 3 - it can also be limited to the outer regions of the rotary body in the centrifugal force direction.
  • the hydraulically required flow rate is the determining factor in determining the area of the filtration surface.
  • the reference numeral 6 shows fastening struts 6, with which the rotary body is fixed to the axis 8.
  • the reference numeral 7 shows an overflow protection 7 at the lower end of the rotary body 4, with which a drainage of the solids-depleted phase in the transport-round channel 12 of the solids-enriched phase is prevented.
  • the reference numeral 8 shows the axis 8, which is driven by a motor and with which the rotary body 4 can be rotated.
  • the reference numeral 9 shows the drip pan 9 for the solid-depleted phase seeped through the solid-scavenging surface structure 3.
  • the rotary body 4 is seated during the loading phase on the edge of the collecting trough 9, and a negative pressure is applied in the resulting space with which the solids-depleted phase is sucked through the openings 5.
  • the body 4 can rotate or not.
  • the reference numeral 10 shows the drain pipe 10 of the collected in the drip tray 9 solids depleted phase.
  • the reference numeral 11 shows the preferably round or polygonal baffle 11, to which the solids-enriched phase is thrown by the rotating rotary body 4.
  • the reference numeral 12 shows the preferably round transport channel 12, in which the solids-enriched phase slips along the baffle 11 along.
  • the Reference numeral 13 shows the axle attachment 13 of the solids-depleted phase rotatable reamer.
  • the reference numeral 14 shows the rotatable reamer 14, can be collected with the remaining on baffle 11 solids, and with the solid-phase enriched in the transport channel 12, the worm 15 can be pushed.
  • the reference numeral 15 shows the screw conveyor 15, with which the solids-enriched phase can be transported out of the device according to the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Centrifugal Separators (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de séparation solide-liquide de milieux liquides contenant des matières solides.
PCT/EP2014/054101 2013-03-03 2014-03-03 Séparateur solide-liquide WO2014135502A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013003397.7 2013-03-03
DE102013003397 2013-03-03

Publications (1)

Publication Number Publication Date
WO2014135502A1 true WO2014135502A1 (fr) 2014-09-12

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PCT/EP2014/054101 WO2014135502A1 (fr) 2013-03-03 2014-03-03 Séparateur solide-liquide

Country Status (1)

Country Link
WO (1) WO2014135502A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110215149A (zh) * 2019-05-24 2019-09-10 中国航天空气动力技术研究院 一种无异味气动热厕具、安装方法及其应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB802255A (en) * 1955-06-11 1958-10-01 Hans Karl Muller Apparatus for filtering
DE1288563B (de) * 1964-07-29 1969-02-06 Gutwirth Karel Verfahren zum Eindicken von Suspensionen mit rotierenden Filterkoerpern
DE2249468A1 (de) * 1972-10-09 1974-04-18 Bhs Bayerische Berg Druckfiltereinrichtung
US5882529A (en) * 1997-05-12 1999-03-16 Gupta; Rajendra P. Reverse centrifugal filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB802255A (en) * 1955-06-11 1958-10-01 Hans Karl Muller Apparatus for filtering
DE1288563B (de) * 1964-07-29 1969-02-06 Gutwirth Karel Verfahren zum Eindicken von Suspensionen mit rotierenden Filterkoerpern
DE2249468A1 (de) * 1972-10-09 1974-04-18 Bhs Bayerische Berg Druckfiltereinrichtung
US5882529A (en) * 1997-05-12 1999-03-16 Gupta; Rajendra P. Reverse centrifugal filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110215149A (zh) * 2019-05-24 2019-09-10 中国航天空气动力技术研究院 一种无异味气动热厕具、安装方法及其应用

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