WO2009065509A1 - Procédé et dispositif pour le traitement de boues - Google Patents

Procédé et dispositif pour le traitement de boues Download PDF

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Publication number
WO2009065509A1
WO2009065509A1 PCT/EP2008/009484 EP2008009484W WO2009065509A1 WO 2009065509 A1 WO2009065509 A1 WO 2009065509A1 EP 2008009484 W EP2008009484 W EP 2008009484W WO 2009065509 A1 WO2009065509 A1 WO 2009065509A1
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WO
WIPO (PCT)
Prior art keywords
rotor
sludge
disintegration
dependent
cavitation
Prior art date
Application number
PCT/EP2008/009484
Other languages
German (de)
English (en)
Inventor
Jochen Friedrich Knauer
Original Assignee
J.F. Knauer Industrie-Elektronik Gmbh
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 J.F. Knauer Industrie-Elektronik Gmbh filed Critical J.F. Knauer Industrie-Elektronik Gmbh
Priority to DE200811003045 priority Critical patent/DE112008003045A5/de
Publication of WO2009065509A1 publication Critical patent/WO2009065509A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2332—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements the stirrer rotating about a horizontal axis; Stirrers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2122—Hollow shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/50—Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a method and an apparatus for treating sludge.
  • Sludges from a variety of sources and processes such as industrial process or mining sludges, or environmental or biogenic sludges to be disposed of or environmentally problematic, must undergo various treatments, particularly dewatering and / or disintegration.
  • Biogenic sludges are of animal or human origin and are a mixture of liquid phase or liquid, mostly water, and solid phase or solid particles comprising biogenic particles or organic solids and are like cells and microorganisms, especially bacteria, and aggregates thereof.
  • organic or inorganic substances can also be dissolved in biogenic sludges and also a gas phase, for example in the form of gas bubbles or dissolved gas, the gas originating in particular from the, in particular aerobic or anaerobic, decomposition of organic substances in the sludge.
  • Sewage sludge is a biogenic sludge that occurs in wastewater treatment.
  • Wastewater treatment plants are used to purify wastewater, which usually have a pre-treatment tank after mechanical pre-treatment, in which undissolved substances such as faecal matter and paper etc. settle or float on the surface.
  • the corresponding pre-clarified waste water is now fed to a biological stage in which organic substances in the wastewater are removed by microorganisms and the supply of atmospheric oxygen and inorganic substances are partially oxidized.
  • a common method for this biological step is an activated sludge process in one Aeration tank with a downstream secondary clarifier.
  • the biogenic constituents of the wastewater are continuously degraded by adding activated sludge containing masses of flocculated aggregated bacteria and by aerating in the aeration tank biotically oxidizing aebro.
  • the activated sludge is separated by settling from the wastewater and a portion of the sludge is recycled as return sludge back to the aeration tank to keep the concentration of microorganisms in the activated sludge tank sufficiently high.
  • the excess sludge produced by the increase in biomass in the secondary clarifier is thickened together with the primary sludge of the primary clarifier tank in a pre-thickener for further treatment and then pumped to an anaerobic digestion in a digestion tower.
  • the digested sludge is then fed after passing through a Nacheindickers a sludge press for drainage and then disposed of.
  • a Nacheindickers a sludge press for drainage and then disposed of.
  • only the excess sludge from the secondary clarifier on the pre-thickener is then usually fed without digester the sludge press and then disposed of the dewatered sludge.
  • a method for dewatering or drying sewage or industrial sludge, a method is known in which the sludge through a filter system, in particular a chamber filter system, or a centrifuge (decanter) is performed, which squeezes out the substantially consisting of water liquid content of the sludge and the solid constituents thus filtering out of the mud.
  • a filter system in particular a chamber filter system, or a centrifuge (decanter) is performed, which squeezes out the substantially consisting of water liquid content of the sludge and the solid constituents thus filtering out of the mud.
  • the sludge is now before dewatering a flocculant (flocculant) containing polymers, added to increase the degree of dewatering or the degree of drying of the sludge, so to better drain the sludge.
  • the mode of action of the flocculant can be thought of as the polymers binding the particulate matter in the sludge in flakes or flocculation and thereby assisting or improving their separation from the water.
  • the filtered out dehydrated Block mass is also referred to as a filter cake.
  • the polymers also improve the passage of water through the filter cake at the subsequent sludge levels.
  • DE 198 08 156 A1 discloses a device for treating conditioner for aqueous sludge with a rotating distributor head for mixing a mixture of active substance stock solution and make-up water in a mixing chamber and a seed device which mixes the active substance solution mixed in the mixing chamber as a conditioning agent at the flowing in a delivery pipe aqueous sludge emits.
  • the distributor head has distributed about its axis of rotation substantially parallel to the axis of rotation extending longitudinal slots as fluid outlets for the mixture and radially outward, and along the axis of rotation extending mixing vanes.
  • the mixture flows through a shaft of the distributor head and through the slit-shaped fluid outlets to the outside into the mixing chamber where it is mixed by the mixing blades.
  • the speed of the distributor head is operated in a range between 700 rpm (revolutions per minute) and 2,500 rpm.
  • the effectiveness of the biological treatment stage in sewage treatment plants can be increased by using so-called homogenizers or disintegrators for treating the sewage sludge, in particular the return sludge, primary sludge or excess sludge and also the digested sludge.
  • homogenizers or disintegrators for treating the sewage sludge, in particular the return sludge, primary sludge or excess sludge and also the digested sludge.
  • DE 100 40 546 A 1 discloses a system for the mechanical disintegration of biogenic sewage sludge with a rapidly rotating tube-head structure having a head with radial openings and radial wings.
  • DE 100 40 545 A 1 also discloses a system for the mechanical disintegration of biogenic sewage sludge, in which the sewage sludge in a starting state comprises microorganisms in the form of cells and a solid, which is formed essentially by aggregates of the cells and suspended solids, and in which causes a disintegration process for the destruction of aggregates and destruction of cells, wherein in a first disintegration process primarily the destruction of aggregates is caused and in a subsequent, separate second Desinteg- rationsvorgang primarily the destruction of cells is caused.
  • the sewage sludge is preferably subjected to separation parts such as strip-shaped wings and possibly additionally with slot-like openings of a rotary wing device and the cells are destroyed only to a very limited extent, but released by the destruction of aggregates enzymes that destroy cells.
  • the sewage sludge is preferably treated with an ultrasonic homogenizer or by means of high-power pulses, and cells are destroyed directly and to a considerable extent by the cavitation generated thereby.
  • WO 2005/028375 A1 discloses a method for comminuting or dosing down particulate substances in suspensions of microorganisms in a carrier medium, in particular in waste waters or sludges of biological sewage treatment plants, in which the carrier medium carries with it a flow channel constructed in the manner of a load nozzle narrowing and then widening cross-section is pumped under pressure and thereby accelerated quickly and then delayed again, causing hydrodynamic cavitation in the Laval nozzle.
  • the invention is based on the object of specifying a new method and a new device for treating sludge, in particular sludge, containing organic cells and aggregates of cells, in particular biogenic sludge such as sewage sludge.
  • the invention is based on the consideration, when withdrawing liquid or liquid phase, in particular water (dewatering), from sludges prior to the addition of flocculant to subject the slurry to an upstream disintegration step and thereby particles and / or aggregates contained in the sludge, in particular organic cells and aggregates From organic cells, at least partially disintegrate, so destroy, break up, unlock, dissolve and / or crush.
  • liquid or liquid phase in particular water (dewatering)
  • the disintegration, destruction or dissolution of the aggregates, in particular cell aggregates or cell aggregates leads to a separation of the particles, in particular cells, or to a smaller average cell or cell aggregate size or aggregate or particle size and thus to a larger surface to which the flocculant can attach or wet it.
  • the flocculant can now displace a larger amount of water or general liquid molecules of the particles or cells, which significantly increases the degree of drying of the sludge with the same added amount of flocculant per sludge amount unit.
  • the disintegration or destruction or rupture or disruption of the cells renders all cells and microorganisms such as bacteria, archaea and fungi or, in the case of plant cells, also the (additional) cell wall, accesses the cytoplasm or cell interior, which consists of water at a percentage of typically 80 to 95%.
  • the flocculent can also contain the cell membrane and possibly the cell wall as well as inside or inside the cytoplasm Components of the cells that are to be assigned to the solid phase bind or accumulate on them and separate them from the water or the liquid.
  • cavitation is generated in the sludge upon disintegration.
  • Cavitation is the creation of gas-filled cavities in a liquid when the static pressure falls below the vapor pressure of the liquid, which is typically several millibars. The local short-term vaporization of the liquid then forms gas bubbles which, when the static pressure exceeds the vapor pressure, implosion-like collapse virtually at the speed of sound. In the collapsed cavities, very high pressures of possibly thousands of bar are created. Cavitation thus arises when the flow velocity exceeds a corresponding value, so that the static pressure correspondingly falls below the vapor pressure. The cavitation leads to enormous inertial forces in the medium or sludge that cause disintegration.
  • any method known per se can be used, for example the use of ultrasound or high-performance pulses or stirred ball mills, For example, as described in DE 100 40 545 ⁇ 1, or a hydrodynamic method as described for example in WO 2005/028375 A 1, where, as described there in each case a further disintegration upstream with a rotating rotor, so a two-stage disintegration can be provided.
  • At least one rotor is used for disintegrating the sludge prior to flocculant addition, which rotor is rotated about its axis of rotation in the sludge, in particular in a flow space in which the sludge flows.
  • cavitation is also generated with the rotor by rotating the rotor at a rotational speed in the slurry which is adjusted, controlled or regulated depending on the nature and flow of the slurry and the geometry of the rotor occurs in the mud on the rotor, in particular on each rotor blade, or, in other words, is above the cavitation limit.
  • the speed of the rotor is also dependent on the pressure in the sewage sludge, ie the static pressure, as well as on the flow velocity of the sewage sludge and thus the dynamic pressure of the sewage sludge.
  • the pressure and flow rate of the sewage sludge in turn depend on the delivery pressure of a conveyor, in particular a pump, for the sludge and on the geometry of the flow channel or space in which the sewage sludge flows and in which the rotor is arranged, as well as on the viscosity of the sludge , From certain flow velocities, correspondingly higher rotational speeds, of the rotor, a larger stationary cavity occurs on the rotor surface, in particular the rotor blades, that is to say a coherent gas layer which surrounds the rotor blades.
  • full cavitation in comparison to partial cavitation, in which individual gas bubbles form on the surface.
  • Full cavitation is more advantageous than partial cavitation in terms of the somewhat more uniform surface loading.
  • the rotational speed of the rotor required in each case for the occurrence of partial cavitation or full cavitation becomes empirical or metrological or even theoretical for the respectively given plant-specific parameters and parameters such as the geometry of the flow space and the rotor, the sludge properties, in particular viscosity, and the sludge pressure or delivery pressure determined and set in operation.
  • the speeds required for cavitation can be very different depending also on the geometry of the rotor, in particular its diameter.
  • rotors with speeds above 3,000 rpm in particular between 3000 rpm and 7000 rpm, preferably between 5000 rpm and 6200 rpm, or even between 3,300 and 4,500 rpm, have proven themselves, however these values are not limiting.
  • the or each rotor has at least one, in particular at least two, openings and / or slots and / or recesses and / or elevations or projections, which protrude in particular from the axis of rotation to the outside, on.
  • the rotor preferably has demolition edges and / or cutting edges and / or shearing edges which, in particular, tear or shred or separate or separate solid particles and aggregates contained in the sludge, in particular aggregates of cells.
  • the rotor has at least one, in particular at least two, rotor blades. But it can also be provided tooth-like projections in the manner of a gear or a saw blade.
  • edges may additionally or exclusively be formed at openings or slots in the rotor.
  • a plurality of rotors can be arranged side by side, in particular in a star shape or parallel to one another.
  • any known device or method can be used, for example according to DE 198 08 156 ⁇ 1.
  • the flocculant is introduced or inoculated into the sludge via a rotating mixer or mixing head.
  • Any flocculant suitable for the specific application and sludge may also be used as flocculant, with the flocculant usually being introduced in the form of a solution of active substance, in particular of an aqueous polymer solution, ie as a liquid flocculant.
  • a modular system which comprises a rotary drive, which from the outside to a wall of a room in which the sludge is located, in particular a flow space or a flow tube, can be fastened or attached and at the drive shaft either either the disintegration rotor or the mixing rotor can be coupled or fastened.
  • a sliding seal in particular mechanical seal, arranged for sealing in the mud or flow space for the sludge, so that the sludge cools the sliding seal.
  • a disintegration unit which comprises the disintegration rotor and the sliding seal, attached as a unit to the wall and the disintegration rotor coupled to or to the drive shaft of the drive or arranged and releasably secured rotatably, in particular by means of clamping screws.
  • a feed system is coupled with at least one feed channel for the flocculant and arranged a sliding seal for sealing in the feed, so that the flocculant cools the mechanical seal.
  • a mixing unit which comprises the mixing rotor, the flocculant feeding system and the sliding seal is attached as a unit to the wall and the mixing rotor coupled or arranged on or to the drive shaft of the drive and releasably secured, in particular by means of clamping screws.
  • the or each rotor is preferably coupled to a rotary shaft, in particular detachably connected, wherein the rotary shaft for securing against the force surges and load changes at two along the axis of rotation (B) spaced apart locations in two rotary bearings is rotatably or rotatably mounted.
  • a drive which is preferably adjustable in its rotational speed, is provided for the rotor at least for the disintegration rotor.
  • the drive is preferably coupled to the rotor or the rotary shaft via a toothed belt, wherein the toothed belt is flexible and at least partially formed from a mechanically damping material, in particular a composite material made of a tensile material such as a tissue or fibers, in particular glass fibers, and at least one elastomeric material to achieve dissipation of movements within the toothed belt, such as vibrations and load surges, and / or damping decoupling of the drive from the rotor.
  • a mechanically damping material in particular a composite material made of a tensile material such as a tissue or fibers, in particular glass fibers, and at least one elastomeric material to achieve dissipation of movements within the toothed belt, such as vibrations and load surges, and / or damping decoupling of the drive from the rotor.
  • an elastomer material in particular for the teeth, and / or a round tooth profile for a better stress distribution and a higher overall load and / or wear-reducing coatings on the tooth side and / or the back side.
  • an adjusting unit for the drive is preferably provided with which the drive is mounted in particular on a base plate.
  • the rotary shaft now has in one embodiment, in particular between the two pivot bearings, a gear in which engages the toothing of the toothed belt.
  • the drive now preferably has a drive gear, which is directed around a preferably parallel to the axis of rotation of the rotor, Rotary axis is rotated or rotated and has an external toothing, in which the toothing of the toothed belt also engages.
  • the transmission ratio of drive to rotary shaft or rotor is chosen in particular between 1: 1, 5 to 1: 5, preferably at about 1: 2.
  • the rotary shaft can now have a free end at an end facing away from the rotor. Furthermore, the rotary shaft, in particular at an end facing away from the rotor, can be connectable or connected to a feed device for feeding a substance, for example a gas or also a liquid, through a cavity of the rotary shaft to the rotor for introduction into the sludge, wherein in particular Gas is supplied, which reduces the cavitation limit and / or faster by a higher vapor pressure, the Kavitationsgasblasen or the gas film formed, so that the speed of the rotor can be reduced, for example nitrogen.
  • a feed device for feeding a substance, for example a gas or also a liquid, through a cavity of the rotary shaft to the rotor for introduction into the sludge, wherein in particular Gas is supplied, which reduces the cavitation limit and / or faster by a higher vapor pressure, the Kavitationsgasblasen or the gas film formed, so that the speed of the rotor can be reduced
  • FIG. 1 shows a device for treating sludge with a disintegration unit and a flocculant addition unit in a perspective view
  • FIG. 2 shows the device according to FIG. 1 with tube units opened for the purpose of illustration, in a perspective view, FIG.
  • FIG. 3 shows the rotor and the rotary shaft of the disintegration unit according to FIG. 1 and FIG. 2 and a lower half of the associated tube unit in a perspective individual view
  • FIG. 4 shows the rotor of the disintegration unit according to FIG. 3 in a side view
  • 5 shows the rotor according to FIG. 4 in a cross section
  • FIG. 6 shows a further embodiment of a disintegration unit in a partially sectioned side view
  • FIG. 7 shows the rotor of the disintegration unit according to FIG. 6 in a perspective view
  • FIG. 8 shows the rotor of the flocculant adding unit according to FIG. 1 and FIG. 2 and a lower half of the associated tube unit in a perspective individual view, in each case schematically. Corresponding parts and sizes are provided in the Figures 1 to 8 with the same reference numerals.
  • the device according to FIG. 1 is designed as a compact module with a base plate 16 which can be parked on a floor by means of feet and a frame 14 mounted on the base plate 16, on which a control unit 12 is mounted or arranged.
  • a support plate 18 is arranged and fixed, on which in turn a disintegration unit 3, a drive 9 for the disintegration unit 3 and a flocculant addition unit 5 with an associated drive 25 are mounted and fastened.
  • the disintegration unit 3 is associated with a first pipe unit 17, which is designed as a T-shaped pipe connection piece.
  • the first pipe unit 17 has in the flow direction of the sludge S arranged one behind the other initially on a first port 17A as inflow or inlet of the sludge S for connection to an unillustrated transport pipe for the sludge S and then a second port 17B as an outlet or outflow of the sludge S. and between them on a pipe member extending perpendicular thereto, a third terminal 17C for connecting the entire pipe unit 17 to a support plate 37 fixed to the support plate 18.
  • a second, likewise T-shaped pipe unit 15 is assigned to the flocculant addition unit 5 and likewise has a first connection 15A and a second connection 15B arranged one behind the other in the direction of flow of the sludge and a third connection 15C for connection to a piece of pipe perpendicularly projecting therebetween the tube unit 15 to the drive 25 of the flocculant addition unit. 5
  • the ports 17B of the first pipe unit 17 and 15A of the second pipe unit 15 are connected to each other, so that the two pipe units 17 and 15 are connected in series in the direction of flow of the sludge or are successively flowed through by the sludge.
  • the second port 15B of the second pipe unit 15 is also connected to a transport pipe, not shown, for the removal of the sludge.
  • the two tube units 15 and 17 are of identical design in the illustrated embodiment.
  • the connections of the tube units 15 and 17 preferably have connecting flanges, as shown, which are connected to one another by means of screw connections.
  • the transport tubes, not shown, preferably also have connection flanges for connection to the connections 17A or 15B.
  • the rotor 7 of the disintegration unit 3 rotates in operation about a rotation axis B, wherein the axis of rotation B of the rotor 7 is directed in particular perpendicular to the flow direction of the sludge S in the first tube unit 17.
  • the disintegration unit 3 further comprises a rotary shaft 30 coupled to the rotor 7 and extending along the axis of rotation B.
  • the rotary shaft 30 is rotatably or rotationally supported at two locations spaced apart along the axis of rotation B in two pivot bearings 31 and 33.
  • the two pivot bearings 31 and 32 are mounted on the support plate 18.
  • the rotary shaft 30 is guided by the support plate 37.
  • a gear 33 of the disintegration unit 3 is connected to or with the rotary shaft 30 and rotates synchronously with the rotary shaft 30 about the rotation axis B, and is particularly arranged between the two rotary bearings 31 and 32, in the example of FIG 1 closer to the pivot bearing 31.
  • the drive 9 comprises at least one electric drive motor 91, not shown, which drives a drive gear 90 on the front side of the drive motor 91 via a motor shaft, which rotates about a rotation axis A, and preferably also a power converter, in particular frequency converter, for variable-speed control of the drive motor 91
  • the drive gear 90 has an external toothing 93 into which an internal toothing 19 of a toothed belt 11 engages.
  • the toothed belt 1 1 rotates on the one hand the drive gear 90 and on the other side the gear 33 of the disintegration unit 3.
  • the gear ratio between the drive gear 90 and the gear 33 of the disintegration unit 3 is selected so that the drive gear 90 rotates slower than the gear 33, typically in a ratio of 1: 1, 5 to 1: 5, preferably 1: 2.
  • an adjusting unit 92 is mounted on the bottom plate 16, via which the drive 9 relative to the bottom plate 16 and thus to the disintegration unit 3 adjustable, in particular in its distance from the disintegration unit 3 in different positions, preferably continuously, is adjustable.
  • the toothed belt 1 1 consists of a flexible material, in particular at least partially made of a hard elastic material, which also preferably good damping properties, ie a good dissipation of movements or absorption of kinetic energy, within the toothed belt 1 1, for example, vibrations and load surges, has.
  • the toothed belt 11 consists of a, preferably provided with a fabric or fibers as a tensile material, elastomeric material such as a rubber or natural rubber material or a synthetic rubber.
  • the rotor 7 connected to the rotary shaft 30 rotates at the same rotational speed as the rotary shaft 30, also driven by the drive 9 via the toothed belt 1 1. Since the drive 9 is a controllable or controllable drive in its rotational speed, the rotor 7 is also in its speed control or adjustable.
  • the rotational speed of the rotary shaft 30 and its gear 31 and thus of the rotor 7 of the disintegration unit 3 is set or controlled or regulated via the rotational speed of the drive 9 so that it lies above the cavitation boundary, so that cavitation occurs in the sludge S on the rotor 7 .
  • the rotational speed or rotational frequency of the rotor 7 is selected above 3,000 rpm (revolutions per minute) or 50 Hz, in particular between 3,000 rpm. (50 Hz) and 7000 rpm. (116.7 Hz).
  • the rotation speed or angular frequency is the speed or rotation frequency multiplied by 2 ⁇ .
  • the pivot bearings 31 and 32 are formed so that they on the one hand and the considerable mechanical load changes and dynamic tilting moments from the rotor 7 on the one hand during the rapid rotation of the rotary shaft 30
  • Rotary shaft 30 act, yet cause a stable storage.
  • rolling bearings can be used which are used in stone crushing mills or non-contact magnetic bearings.
  • the rotor 7 comprises a central rotor body 71, which is designed as a hollow shaft closed at the front end, at which two mutually offset by 180 ° or in the opposite direction radially to the rotational axis B outwardly projecting rotor blades (or: rotor blades) 70 are arranged.
  • extensions or connecting elements 78 are provided for connection of the rotor 7 with an outer sleeve of the sliding seal 72 by means of a screw connection, not shown.
  • the entire rotor 7 is preferably formed symmetrically to a symmetry plane contained the rotation axis D, d. H. the rotor blades 70 are mirror-symmetrical to each other.
  • the axis of rotation A is a self-axis or main axis of inertia of the rotor 7 and imbalances are kept small or avoided.
  • the rotor blades 70 of the rotor 7, in the embodiment shown in FIGS. 3 to 5, have end faces 7OA on the end viewed in the direction of the rotation axis B and radially outer faces 70B and in the direction of rotation D surfaces 7OC pointing towards the rotor 7 and in the opposite direction to the direction of rotation D. surface 7OD. All mentioned surfaces 7OA to 7OD of the rotor blades 70 are formed in the illustrated embodiment as flat surfaces or flat sides, that is flat.
  • the surfaces 7OC and 7OD directed in the direction of rotation D or in opposite directions to the direction of rotation D are parallel to one another and run essentially parallel to a plane containing the axis of rotation B.
  • Perpendicular to the two surfaces 70C and 70D extends the outer surface 7OB and is thus perpendicular to a radial direction to the axis of rotation B.
  • the outer surfaces 7OB of the rotor blades 70 are flat and form with the surfaces 7OC and 7OD each have a straight edge parallel to the axis of rotation B runs.
  • the outer surfaces 7OB have an approximately uniform rotational speed since they are approximately at the same radius.
  • the end faces 7OA of the two rotor blades 70 are, however, arranged obliquely for optimum fitting in the cross section of the flow space 6, ie at an angle to the radial direction, and planar and thus form with the surfaces 7OC and 7OD respectively a rectilinear edge and with the outer surface 7OB also a perpendicular to these two edges extending another straight edge.
  • end faces 7OA running obliquely away from the end, however, end faces 7OA which extend away from the axis of rotation A in the radial direction and which are directed perpendicular to the outer faces 7OB could also be provided, so that a cuboid rotor blade 70 results.
  • the surfaces 7OC and 7OD are formed wider than the end surfaces 7OA and the outer surfaces 7OB forming narrow sides of the rotor blades 70.
  • the dimensions are indicated in FIGS. 4 and 5, namely the radial dimensions or widths of the rotor blades 70 with d, the length of the rotor blades 70 measured parallel to the rotation axis B with the connecting elements 78 with L and the width of the rotor blades 70 measured perpendicular to the length 1 b.
  • Preferred values for the dimensions of the rotor blades 70 are between 76 mm and 124 mm for the length L, between 4 mm and 18 mm for the width b and between 3 mm and 53 mm for the radial width d.
  • the length L of the rotor blades 70 is adapted to the flow cross-section of the sludge S or diameter of the pipe section of the pipe unit 17 and is in particular between 28% and 95% of the diameter of the sludge pipe of the pipe unit 17.
  • slots 75 are additionally provided in the wall of the rotor body 71 offset by 90 ° relative to the rotor blades 70, through which the sludge S can partially pass into the interior of the rotor body 71 and thereby the disintegration effect can be further increased.
  • the length of the slots 75 measured parallel to the axis of rotation B is denoted by 1 and the width of the slots in a rear area with dl and in a front area with d2, wherein the rear width dl of the slots 75 is preferably smaller than the front width d2.
  • Preferred values of the dimensions of the slots 75 are between 2 mm and 6 mm for the rear width d 1, between 4 mm and 8 mm for the front width d 2 and between 60 and 90 mm for the length 1
  • the rotary shaft 30 protrudes, as seen in Figures 1 to 3, with an end 35 beyond the pivot bearing 32 addition, said end may be free or may be connected to a device not shown, by means of which, if the rotary shaft 30 as Hollow shaft is formed by the hollow shaft, a material, such as a gas or a liquid, can be guided to the rotor 7 of the disintegration unit 3 and via the slots 75 in the sludge S can be introduced.
  • a gas can be supplied which reduces the cavitation limit, which therefore causes the cavitation gas bubbles or the gas film to form faster, for example because of its higher vapor pressure, so that the rotational speed or rotational speed of the rotor 7 of the disintegration unit 3 can be reduced.
  • a gas such as nitrogen can be supplied here.
  • FIGS. 6 and 7 show an alternative embodiment with a closed rotor 7, which passes through an opening in the tube wall 60 of FIG.
  • Sludge pipe 6 projects into the flow space for the sludge S, without requiring a T-piece as in Figures 1 to 3.
  • the rotor 7 according to Figures 6 and 7, no slots 75, but only the rotor blades 70 on the rotor body 71, which can then be solid or not hollow inside.
  • a direct drive is provided as drive 9, which drives the rotor 7 directly about the common axis of rotation B.
  • the rotor 7 and its mechanical seal 72 are arranged completely in the flow space for the sludge S formed inside the pipe unit 17 or the pipe 6.
  • This arrangement of the mechanical seal 72 in the sludge S has the advantage that the mechanical seal 72 can be cooled by the sludge S.
  • the mechanical seal 72 seals the passage of the rotary shaft 30 through the connection 17C and the flange as well as the carrier plate 37 or the tube wall 60.
  • the rotor 8 of the flocculant addition unit 5 is driven directly by a separate drive motor 25, thus rotating at the same rotational speed as the drive motor 25 about the common axis of rotation C.
  • an intermediate transmission with a corresponding transmission ratio may also be provided.
  • the rotor 8 of the flocculant addition unit 5 can also be connected via a further toothed belt or belt another transmission means are driven by the drive motor 91 of the drive 9 for the disintegration unit 3 or by its own drive motor or drive.
  • one of two, in particular identical units, each with a drive (9), a toothed belt (1 1) and one, in particular hollow inside, rotating shaft (30) with pivot bearings (31, 32) and rotor (7, 8) can be used both for the disintegration unit 3 and for the flocculant addition unit 5, so that a single drive module with rotor can be used for both applications.
  • the speeds can then be set correspondingly different and in the case of the disintegration unit 3, the hollow shaft (30) sealed and in the case of Flockschzugabetician 5 can be supplied via the hollow shaft (30), the flocculant F.
  • the rotor 8 of the flocculant addition unit 5 is in particular constructed essentially identical to the rotor 7 of the disintegration unit 3 according to FIGS. 4 and 5 and has an internally hollow rotor body 81 with rotor blades 80 and slots 85 arranged therebetween, through which the latter passes via the interior of the rotor Hollow shaft or the rotor body 81 supplied flocculant F during rapid rotation in the mud S 'emerges.
  • a mechanical seal of the rotor 8 is designated 82.
  • the sludge S to be treated first flows through the tube unit 17 and is subjected to disintegration therein by the rotor 7 of the disintegration unit 3 located in the tube unit 17.
  • the cavitation in the sludge arising at the rotor blades 70 due to the speed of the rotor 7 selected above the cavitation limit considerably increases the disintegration effect.
  • the surfaces 7OC of the rotor blades 70, which are aligned in the direction of rotation D tet also form baffles that have a reducing or homogenizing effect on the sludge composition.
  • the water Due to the previous disintegration, the water is already partially removed from the sludge particles and aggregates of cells and cells themselves, and owing to the larger surface areas achieved, more flocculant can accumulate on the surface of the sludge particles in the flock additive addition unit 5.
  • the average particle size or size of the solid particles formed in the sludge, in particular from the cells can be reduced by a factor of ten.
  • the integrated or digested sludge after the disintegration unit 3 is denoted by S 'and is supplied to the flocculant addition unit 5.
  • S 'and is supplied to the flocculant addition unit 5.
  • the rotor 8 of the flocculant addition unit 5 is continuously in the sludge S ', which has passed through the disintegration unit 3 and flows through the pipe section 15, flocculant F mixed, in particular a per se known flocculant based on polymer.
  • a dewatering unit for example a filter press or centrifuge, not shown here, and dried there or dehydrated.
  • the high-efficiency flocculant in particular based on polymer, improves the degree of drying or the drainage of the sludge.
  • the system according to the invention finds favored use in a sewage treatment plant, in particular in connection with a biological stage, preferably an activated sludge system.
  • the application of the system according to the invention is not limited to this particular application, but can be used in all biogenic sludges or industrial sludges, in particular for their drainage.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Selon la présente invention, lors d'au moins une première étape de procédé, on soumet les boues à un processus de désintégration dans un dispositif de désintégration (3), ledit processus consistant à désintégrer au moins partiellement les particules et/ou les agrégats contenus dans les boues, puis, au cours d'une seconde étape de procédé, on mélange la boue à un agent de floculation dans un dispositif d'alimentation en agent de floculation (5).
PCT/EP2008/009484 2007-11-20 2008-11-11 Procédé et dispositif pour le traitement de boues WO2009065509A1 (fr)

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DE200710055563 DE102007055563A1 (de) 2007-11-20 2007-11-20 Verfahren und Vorrichtung zum Behandeln von Schlamm

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CN101921050A (zh) * 2010-08-03 2010-12-22 中国船舶重工集团公司第七○二研究所 水底淤泥脱水干化装置及方法
WO2012131071A1 (fr) * 2011-03-30 2012-10-04 J.F. Knauer Industrie-Elektronik Gmbh Appareil de mélange pour le broyage de boues
CN105967494A (zh) * 2016-05-19 2016-09-28 山东成泰化工有限公司 一种石化污泥的脱水方法
DE102016101417A1 (de) 2016-01-27 2017-07-27 Clariant lnternational Ltd Vorrichtung und Verfahren zur Flokkulation von Feststoffanteilen eines Fest-flüssig-Gemisches
DE102016006120A1 (de) * 2016-05-18 2017-11-23 Bernhard Giersberg Mischvorrichtung
WO2017211542A1 (fr) * 2016-06-08 2017-12-14 Veolia Water Solutions & Technologies Support Procede ameliore de deshydratation de boues assistee par reactif floculant et installation pour la mise en oeuvre d'un tel procede
US9889621B2 (en) 2011-02-02 2018-02-13 Langenstein & Schemann Gmbh Press and method for pressing workpieces
AT521104A1 (de) * 2018-03-16 2019-10-15 Dr Ulrich Kubinger Verfahren zur Optimierung der Entwässerung von Schlamm aus einem biologischen Reinigungsprozess
FR3086941A1 (fr) * 2018-10-08 2020-04-10 Veolia Water Solutions & Technologies Support Procede ameliore de deshydratation de boues assistee par reactif floculant
CN111704258A (zh) * 2019-03-18 2020-09-25 天津嘉中科技发展有限公司 一种污水中大块不腐烂污物处理器
EP3795543A1 (fr) 2019-09-20 2021-03-24 Ulrich Kubinger Procédé d'optimisation du drainage des boues comprenant des microorganismes
CN112897852A (zh) * 2021-01-29 2021-06-04 深圳市瑞沃工程有限公司 一种泥浆脱水固化施工装置及方法

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CN101921050B (zh) * 2010-08-03 2014-11-19 中国船舶重工集团公司第七○二研究所 水底淤泥脱水干化装置及方法
CN101921050A (zh) * 2010-08-03 2010-12-22 中国船舶重工集团公司第七○二研究所 水底淤泥脱水干化装置及方法
US9889621B2 (en) 2011-02-02 2018-02-13 Langenstein & Schemann Gmbh Press and method for pressing workpieces
US10486996B2 (en) 2011-03-30 2019-11-26 Ecolab Usa Inc. Mixing apparatus for crushing sludge
WO2012131071A1 (fr) * 2011-03-30 2012-10-04 J.F. Knauer Industrie-Elektronik Gmbh Appareil de mélange pour le broyage de boues
US9517959B2 (en) 2011-03-30 2016-12-13 Ecolab Usa Inc. Mixing apparatus for crushing sludge
US10227249B2 (en) 2011-03-30 2019-03-12 Ecolab Usa Inc. Mixing apparatus for crushing sludge
DE102016101417A1 (de) 2016-01-27 2017-07-27 Clariant lnternational Ltd Vorrichtung und Verfahren zur Flokkulation von Feststoffanteilen eines Fest-flüssig-Gemisches
WO2017129419A1 (fr) 2016-01-27 2017-08-03 Clariant International Ltd Dispositif et procédé de floculation de particules solides d'un mélange solide-liquide
DE102016006120A1 (de) * 2016-05-18 2017-11-23 Bernhard Giersberg Mischvorrichtung
DE102016006120B4 (de) 2016-05-18 2022-02-17 Bernhard Giersberg Mischvorrichtung
CN105967494A (zh) * 2016-05-19 2016-09-28 山东成泰化工有限公司 一种石化污泥的脱水方法
US10981820B2 (en) 2016-06-08 2021-04-20 Veolia Water Solutions & Technologies Support Sludge dewatering process assisted by flocculating reactant and plant for the implementation of such a process
FR3052450A1 (fr) * 2016-06-08 2017-12-15 Veolia Water Solutions & Tech Procede ameliore de deshydratation de boues assistee par reactif floculant et installation pour la mise en œuvre d'un tel procede.
WO2017211542A1 (fr) * 2016-06-08 2017-12-14 Veolia Water Solutions & Technologies Support Procede ameliore de deshydratation de boues assistee par reactif floculant et installation pour la mise en oeuvre d'un tel procede
AU2017276542B2 (en) * 2016-06-08 2022-11-03 Veolia Water Solutions & Technologies Support Improved sludge dewatering process assisted by flocculating reactant and plant for the implementation of such a process
AT521104A1 (de) * 2018-03-16 2019-10-15 Dr Ulrich Kubinger Verfahren zur Optimierung der Entwässerung von Schlamm aus einem biologischen Reinigungsprozess
AT521104B1 (de) * 2018-03-16 2021-07-15 Ulrich Kubinger Dr Verfahren zur Optimierung der Entwässerung von Schlamm aus einem biologischen Reinigungsprozess
FR3086941A1 (fr) * 2018-10-08 2020-04-10 Veolia Water Solutions & Technologies Support Procede ameliore de deshydratation de boues assistee par reactif floculant
WO2020074448A1 (fr) * 2018-10-08 2020-04-16 Veolia Water Solutions & Technologies Support Procede ameliore de deshydratation de boues assistee par reactif floculant
CN111704258A (zh) * 2019-03-18 2020-09-25 天津嘉中科技发展有限公司 一种污水中大块不腐烂污物处理器
CN111704258B (zh) * 2019-03-18 2022-11-15 天津嘉中科技发展有限公司 一种污水中大块不腐烂污物处理器
EP3795543A1 (fr) 2019-09-20 2021-03-24 Ulrich Kubinger Procédé d'optimisation du drainage des boues comprenant des microorganismes
CN112897852A (zh) * 2021-01-29 2021-06-04 深圳市瑞沃工程有限公司 一种泥浆脱水固化施工装置及方法

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