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WO2013046162A1 - Appareil d'extrusion destiné au traitement de boues publiques, industrielles et/ou animales - Google Patents

Appareil d'extrusion destiné au traitement de boues publiques, industrielles et/ou animales Download PDF

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Publication number
WO2013046162A1
WO2013046162A1 PCT/IB2012/055182 IB2012055182W WO2013046162A1 WO 2013046162 A1 WO2013046162 A1 WO 2013046162A1 IB 2012055182 W IB2012055182 W IB 2012055182W WO 2013046162 A1 WO2013046162 A1 WO 2013046162A1
Authority
WO
WIPO (PCT)
Prior art keywords
sludge
extrusion
crusher device
outlet
conduit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2012/055182
Other languages
English (en)
Inventor
Antonio Polato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officine Di Cartigliano SpA
Original Assignee
Officine Di Cartigliano SpA
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 Officine Di Cartigliano SpA filed Critical Officine Di Cartigliano SpA
Publication of WO2013046162A1 publication Critical patent/WO2013046162A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
    • 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
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

Definitions

  • the present invention generally finds application in the field of waste treatment, and particularly relates to an extruder apparatus for treatment of civil, industrial and/or animal sludge and similar waste products.
  • Civil, industrial and animal sludge such as chicken droppings, agricultural sludge, biodigestate, tannery or paper sludge, animal manure, are known to be suitable for use as a fuel supply for a biomass power plant.
  • the material that enters such plant should be appropriately dried.
  • sludge is dried by natural convection, i.e. by allowing it to dry in the open air, or by forced convection in large forcing houses equipped with ceiling fans.
  • the Applicant developed a wet waste drying plant, as disclosed in the Italian Application VI2008A000251 , in which sludge is treated beforehand by an extruder equipped with a blade assembly located upstream from a perforated extrusion die to turn the material into a plurality of elongate extruded elements.
  • the sludge has a consistency that significantly hinders its passage through the holes of the extrusion die, because the lower moisture content causes an increase of friction and hardens the sludge in the extrusion holes, thereby obstructing them.
  • JP200513151 1 further discloses a sludge treatment device which comprises a sludge loading line having a feeding screw that compresses sludge and conveys it to an extruder for peptization. Stirring elements are disposed upstream and downstream from the screw, for mixing the sludge.
  • WO2009/1 16170 discloses a further apparatus for treatment of industrial sludge, which also has a sludge feeding screw, which has an extrusion die downstream therefrom, followed by a blade for pelletizing the extruded sludge.
  • a first sludge crushing element is provided upstream from the screw, which consists of perforated pipes for receiving the sludge introduced therein by pressurized air and a second crushing element is located downstream from the first crushing element, and comprises a plurality of stationary and rotating blades.
  • the object of the present invention is to overcome the above described prior art drawbacks, by providing an extruder apparatus for treatment of civil, industrial and/or animal sludge, that is particularly efficient and relatively cost-effective.
  • a particular object of the invention is to provide an extruder apparatus for treatment of civil, industrial and/or animal sludge that removes or at least reduces the risk of sludge lumps sticking therein, and blocking the apparatus or reducing the throughput.
  • a further object of the present invention is to provide an extruder apparatus for sludge treatment, that produces sludge having a relatively small particle size, thereby allowing continuous flow thereof in the apparatus.
  • Yet another object of the present invention is to provide an extruder apparatus for sludge treatment that produces extruded elements of varying sizes.
  • Another object of the present invention is to provide an extruder apparatus for sludge treatment that allows the extrusion die to be cleaned without requiring apparatus down time.
  • an extruder apparatus for treatment of civil, industrial and/or animal sludge as defined in claim 1 , which comprises a load-bearing frame having a feed conduit with an inlet for the sludge to be treated and an outlet for the treated sludge, means for feeding the sludge from said inlet to said outlet, extrusion means for extruding sludge into a plurality of substantially thread-like extruded elements that flow out of said outlet, sludge crushing means housed in said feed conduit.
  • the apparatus is characterized in that these crushing means include a plurality of crusher devices successively arranged along said conduit upstream of said extrusion means, to crush the sludge and any fibrous residue therein, to prevent the formation of compacted sludge lumps.
  • the apparatus will prevent the formation of excessively large and compacted sludge lumps, that might remain in the feed conduit, and block the apparatus.
  • any foreign matter such as fibers, hairs or the like will be suitably chipped to prevent them from aggregating into compacted sludge lumps.
  • FIG. 1 is a schematic view of a sludge treatment plant having an extruder apparatus of the invention
  • FIG. 2 is a perspective view of an extruder apparatus of the invention
  • FIGS. 3 and 4 are a top view and a side view of the apparatus of Fig. 2 respectively;
  • FIG. 5 is a perspective view of a first detail of the apparatus of the invention.
  • FIGS. 6 and 7 are partly sectional top and side views of the detail of Fig. 5 respectively;
  • FIG. 8 is a perspective view of a second detail of the apparatus of the invention.
  • FIG. 9 is a side view of the detail of Fig. 8.
  • FIG. 10 is a sectional side view of the detail of Fig. 8.
  • FIG. 1 1 is a perspective view of a first element of the detail of Fig. 8 in a first configuration
  • FIG. 12 is a perspective view of a first element of the detail of Fig. 8 in a second configuration
  • FIG. 13 is a perspective view of a further element of the second detail of Fig. 8;
  • FIG. 14 is a top view of the element of Fig. 13;
  • FIG. 15 is a bottom perspective view of a third element of the second detail of Fig. 8;
  • FIG. 16 is a sectional side view of the third element of Fig. 15.
  • an extruder apparatus for treatment of industrial, civil and/or animal sludge may be part of a plant I for treatment of organic material, such as solid organic waste, chicken droppings or other animal manure, tannery or paper sludge or other industrial waste.
  • the plant I may be a drying plant as disclosed in the above mentioned Italian application VI2008A000251 and will basically include an extrusion station Si comprising an apparatus 1 of the invention and a drying station, for drying the extruded material coming from the extrusion station S-i.
  • the extrusion station Si may be mounted above the drying station S 2 for the extruded material to be directly conveyed therein.
  • a conveyor belt may be placed between the two stations S-i , S 2 to convey the extruded material into the drying station S 2 .
  • the apparatus 1 comprises a load-bearing frame 2 having a feed conduit 3 with an inlet 4 for the sludge to be treated and an outlet 5 for the treated sludge.
  • Means 6 are provided in the conduit 3 for feeding the sludge from the inlet 4 to the outlet 5 of the conduit 3.
  • the apparatus 1 also comprises extrusion means 7 located proximate to the outlet 5 and adapted to extrude therefrom the treated sludge into a plurality of substantially thread-like extruded elements.
  • the apparatus 1 comprises sludge crushing means 8 located upstream from the extrusion means 7 and adapted to crush the sludge and reduce their particle size, to prevent the formation of compacted sludge lumps.
  • the crushing means 8 will include a plurality of crusher devices 9, 10, 1 1 , arranged in line along the conduit 3 and adapted to reduce the particle size of the sludge and to crush any residue therein, particularly fibrous residues.
  • the crushing means 8 will include a first crusher device 9 located at the inlet of the conduit 3 and designed for coarse crushing of the inflowing sludge.
  • the first crusher device will include a pair of shafts 12, 12' rotating about respective first axes of rotation X, X', which extend parallel to a first substantially longitudinal direction l_i and have respective blade assemblies 13, 13' for crushing the sludge, while assisting their longitudinal feed motion along the conduit 3.
  • the feeding means 6 will include a substantially longitudinal motorized first feeding screw 14 which is housed in the conduit 3 downstream of the crusher device 9.
  • the first screw 14 may have the same axis of rotation as the first 12 of the two shafts of the first crusher device 9.
  • the shaft 15 of the first screw 14 may be integral with the first shaft 12 of the first crusher device 9, and be an extension thereof.
  • first shaft 12 and the first screw 14 may be rotated by a single motor 16, which will also drive the second blade shaft 12' via an appropriate transmission 16', preferably in a direction of rotation opposite to that of the first shaft 12.
  • the crushing means 8 will include a second crusher device 10 located downstream of the first screw 14 and designed to crush any residue in the sludge, such as hairs and fibrous parts.
  • the apparatus 1 will comprise a longitudinal arm 17 hinged to a first fixed bracket 19 at a first end 18 located at the sludge inlet 4.
  • the arm 17 will delimit therein a starting section 3' of the sludge feeding conduit 3, which will house both the first crusher device 9 and the first screw 14.
  • the arm 17 will be connected at its second longitudinal end 20 to an extrusion head 21 , more clearly shown in Fig. 8, which has a structure 22 for containing and supporting the second crusher device 10 and extrusion means 7.
  • the containing and supporting structure 22 will comprise a tubular cylindrical jacket 23 communicating with the starting section 3' of the conduit 3 to define its final section 3", with the outlet 5 for the crushed and extruded sludge.
  • the final section 3" of the conduit 3 extends in a substantially vertical second longitudinal direction L 2 orthogonal to the first longitudinal direction L
  • the cylindrical jacket 23 will house a second feeding screw 24 having a shaft 25 connected to a second electric motor 26 to rotate about a substantially vertical second axis of rotation Y parallel to the second longitudinal direction L 2 .
  • the second screw 24 will have a first axial end 24' facing the first screw 14, particularly its end 14', to receive the crushed sludge therefrom and push it downwards toward the second crusher device 10.
  • the second screw 24 will be a variable pitch screw, for further sludge compression as sludge is being fed, at the second crusher device 10.
  • the latter will comprise a hub 27 which is integral with the shaft 25 of the second screw 24, at a second axial end 24" thereof, to rotate therewith about the second axis of rotation Y and has a lower end equipped with a plurality of chipping elements 28.
  • the chipping elements 28 will be blades and each of them will include a blade 29 that radially extends from the substantially cylindrical hub and has cutting edges 30 extending in a plane substantially orthogonal to the second axis of rotation Y.
  • the chipping elements 28 will include each a sludge grinding roller 31 integral with the hub 27 and idling about a respective substantially radial and horizontal third axis W.
  • the grinding rollers 31 may be mounted to idle about a center axis W each having a corrugated outer peripheral surface 32 for assisting sludge grinding.
  • the second crusher device 10 will include a perforated plate 33 which contacts such chipping elements 28 in interacting fashion.
  • the perforated plate 33 will have a plurality of substantially vertical through holes, allowing the passage of sludge upon reduction of its size by the second crusher device 10.
  • the perforated plate 33 will extend on a plane substantially orthogonal to the second longitudinal direction L 2 .
  • the crushing means 8 will include a third additional crusher device 1 1 , as shown in Fig. 1 1 , which is located downstream from the perforated plate 33 and has a substantially helical blade, rotating about the second longitudinal axis Y, integral with the chipping elements 28 of the second crusher device 10.
  • a third additional crusher device 1 1 as shown in Fig. 1 1 , which is located downstream from the perforated plate 33 and has a substantially helical blade, rotating about the second longitudinal axis Y, integral with the chipping elements 28 of the second crusher device 10.
  • the extrusion means 7 will include at least one extrusion die 36, located downstream from the third crusher device 1 1 , and having one or more extrusion passages 37 of a predetermined diameter for extruding a plurality of extruded elements having a predetermined diameter and a predetermined length.
  • the extrusion means 7 may include a plurality of extrusion dies, e.g. two dies, referenced 36, 38 in the annexed figures, which are adapted to be selectively moved to the outlet 5 of the conduit 3 for interaction with the third crusher device 1 1 .
  • the dies 36, 38 will be substantially similar, with passages 37, 40 a few millimeters in diameter, such that one of them may be used while the other is being cleaned, thereby avoiding downtimes and substantially increasing the throughput of the apparatus.
  • the extrusion dies 36, 38 may have a plate 39 adjacent thereto, having a discharge passage 41 whose diameter is substantially similar to that of the outlet 5, and designed for use in emergency conditions for free sludge discharge.
  • both the dies 36, 38 and the discharge plate 39 will be fixed to a die slide 42, which slides below the cylindrical jacket 23 along substantially transverse guides 43 to be selectively moved, upon actuation of a hydraulic cylinder 49, to the crusher device 1 1 located at the outlet 5 of the conduit 3.
  • the extrusion means 7 may also comprise a cleaning device 44, for cleaning the extrusion dies 36, 38, as shown in greater detail in Figs. 15 and 16.
  • the cleaning device 44 will be mounted integral with the jacket 23 to act upon one of the dies 36, 38 arranged in a non-operating position, and allows the other of the dies 36, 38 to be moved to the work position. Thus, the apparatus 1 shall not be stopped for cleaning of the dies 36, 38.
  • the cleaning device 44 may include a cylinder 45 that slidably receives a piston 46 having a plurality of pointed elements 47 at its lower end, such as needles or nails, for penetrating the passages 37, 40 of the dies
  • the cleaning device 44 may also include a conduit 50 connected to water supply means, not shown, and connected to the nailed piston 46 for simultaneously removing the residues built up in the extrusion passages 37, 40 by the combined mechanical actions of the piston 46 and water.
  • the arm 17 of the frame 2 may be hinged at its first longitudinal end 18 to the fixed bracket 19 to swing at a predetermined angle about a substantially transverse and vertical axis Z.
  • the extrusion head 21 may be equipped with substantially curved second guides 48, defining a rolling track for a wheel associated with the structure 22 for containing and supporting the head 23 to support the latter in its swinging motion.
  • the invention fulfills the intended objects and particularly meets the requirement of providing a sludge extruder apparatus that avoids any risk of compacted sludge lump formation, which might lead to blockage of the apparatus, and ensures high throughput.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatment Of Sludge (AREA)

Abstract

La présente invention se rapporte à un appareil d'extrusion destiné au traitement de boues publiques, industrielles et/ou animales comprenant une armature porteuse (2) possédant un conduit d'alimentation (3) doté d'une entrée (4) destinée aux boues à traiter et d'une sortie (5) destinée aux boues traitées, un moyen (6) destiné à acheminer les boues de l'entrée (4) vers la sortie (5) du conduit (3), un moyen d'extrusion (7) destiné à extruder les boues en une pluralité d'éléments extrudés sensiblement en forme de fil par l'intermédiaire de la sortie (5), un moyen d'écrasement de boues (8), qui est logé dans le conduit (3) en amont du moyen d'extrusion (7) pour réduire leur taille de particule d'une valeur de départ maximale à une valeur finale minimale, ce qui permet d'empêcher la formation de morceaux de boues compactés.
PCT/IB2012/055182 2011-09-29 2012-09-28 Appareil d'extrusion destiné au traitement de boues publiques, industrielles et/ou animales Ceased WO2013046162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI2011A000259 2011-09-29
IT000259A ITVI20110259A1 (it) 2011-09-29 2011-09-29 Apparato estrusore per la lavorazione di fanghi civili, industriali e/o animali

Publications (1)

Publication Number Publication Date
WO2013046162A1 true WO2013046162A1 (fr) 2013-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/055182 Ceased WO2013046162A1 (fr) 2011-09-29 2012-09-28 Appareil d'extrusion destiné au traitement de boues publiques, industrielles et/ou animales

Country Status (2)

Country Link
IT (1) ITVI20110259A1 (fr)
WO (1) WO2013046162A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117700065A (zh) * 2023-12-30 2024-03-15 南通爱可普环保设备有限公司 一种模块化污泥烘干机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315313A1 (fr) * 1975-06-27 1977-01-21 Carad Procede et appareil pour recuperer les fines d'une boue ou d'une suspension
JP2005131511A (ja) 2003-10-29 2005-05-26 Kobelco Eco-Solutions Co Ltd 廃棄物供給装置
WO2009116170A1 (fr) 2008-03-21 2009-09-24 株式会社M&W Appareil de recyclage de boue organique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315313A1 (fr) * 1975-06-27 1977-01-21 Carad Procede et appareil pour recuperer les fines d'une boue ou d'une suspension
JP2005131511A (ja) 2003-10-29 2005-05-26 Kobelco Eco-Solutions Co Ltd 廃棄物供給装置
WO2009116170A1 (fr) 2008-03-21 2009-09-24 株式会社M&W Appareil de recyclage de boue organique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117700065A (zh) * 2023-12-30 2024-03-15 南通爱可普环保设备有限公司 一种模块化污泥烘干机
CN117700065B (zh) * 2023-12-30 2024-06-04 南通爱可普环保设备有限公司 一种模块化污泥烘干机

Also Published As

Publication number Publication date
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