DE3546274A1 - Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process - Google Patents

Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process

Info

Publication number
DE3546274A1
DE3546274A1 DE19853546274 DE3546274A DE3546274A1 DE 3546274 A1 DE3546274 A1 DE 3546274A1 DE 19853546274 DE19853546274 DE 19853546274 DE 3546274 A DE3546274 A DE 3546274A DE 3546274 A1 DE3546274 A1 DE 3546274A1
Authority
DE
Germany
Prior art keywords
mixing
hydrated lime
sewage sludge
lime
individual groups
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.)
Withdrawn
Application number
DE19853546274
Other languages
German (de)
Inventor
Wolfgang Panholzer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19853546274 priority Critical patent/DE3546274A1/en
Publication of DE3546274A1 publication Critical patent/DE3546274A1/en
Withdrawn legal-status Critical Current

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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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/687—Devices for dosing solid compounds
    • 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
    • B01F27/2123—Shafts with both stirring means and feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1292—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part

Abstract

Known processes require very elaborate apparatus and are associated with unwanted additional introduction of water into the sewage sludge. The aim therefore is to specify a process whose device permits the addition of powdered hydrated lime by means of a compact metering and mixing device. The solution provides for accommodation of the metering and mixing device in a common housing. Equipment with mixing tools of various design depending on the particular characteristics of the sludge is also provided for.

Description

Die Erfindung betrifft ein Verfahren zum Hygienisieren von Klärschlämmen durch Zugabe von pulvrigem Kalkhydrat.The invention relates to a method for sanitizing sewage sludge by adding powdered hydrated lime.

Der nach dem Verfahren behandelte Klärschlamm ist seuchenhygienisch unbedenklich und zur Ausbringung in die Landwirtschaft und Landbau geeignet.The sewage sludge treated according to the procedure is hygienic harmless and for application in agriculture and agriculture suitable.

Bekannte Verfahren zur Hygienisierung von Klärschlamm mit Kalk haben den Nachteil, daß der Kalk nicht pulvrig sondern nur in Form von Kalkmilch niedriger Konzentration homogen in den Klärschlamm eingemischt werden kann. Dieses Verfahren bedingt hohen apparativen Aufwand durch notwendige Kalkmilchaufbereitungsstationen. Weiterer Nachteil bisheriger Anwendungen ist der Umstand, daß in erheblichem Umfang zusätzlich Wasser in den Klärschlamm eingebracht wird und damit die Schlammengen und daraus folgend die Ausbringungskosten erhöht werden.Known methods for sanitizing sewage sludge with lime have the disadvantage that the lime is not powdery but only in Form lime milk of low concentration homogeneously in the sewage sludge can be mixed in. This procedure requires high apparatus expenditure due to the necessary lime milk preparation stations. Another disadvantage of previous applications is the fact that to a considerable extent additional water in the sewage sludge is introduced and thus the sludge quantities and from it subsequently the application costs are increased.

Insgesamt betrachtet sind also bekannte Verfahren apparativ aufwendig, die Betriebs- und Ausbringungskosten hoch.Viewed overall, known methods are therefore expensive in terms of equipment, operating and deployment costs high.

Diese Sachlage berücksichtigend ist es Aufgabe der Erfindung, ein Verfahren nach der eingangs beschriebenen Art zu nennen, bei dessen Anwendung der Aufwand reduziert und die Ausbringungskosten minimiert werden.Taking this situation into account, it is the object of the invention to name a method of the type described at the outset, when it is used, the effort is reduced and the application costs be minimized.

Wesentlicher Bestandteil der Erfindung ist der Umstand, daß in einem einzigen Aggregat die Dosierung des Kalks und die Vermischung mit Dünnschlamm in einem voreinstellbaren Verhältnis erfolgt.An essential part of the invention is the fact that in the lime dosing and mixing in a single unit with thin sludge in a preset ratio.

Das kombinierte Dosier- und Mischaggregat besteht im vorderen Teil aus einem Dosier- und Auflockerungswendel und im hinteren Teil aus einem Misch- und Förderorgan. Das gesamte System ist in einem Rohrgehäuse untergebracht, das entweder unter ein Kalksilo montiert wird oder bei entsprechender Ausbildung des Einlaufs auch mit Sackware beschickt werden kann.The combined dosing and mixing unit consists of the front part from a metering and loosening coil and in the rear part from a mixing and funding body. The whole system is in one Pipe housing housed, either mounted under a lime silo will or with appropriate training of the enema  can be loaded with bagged goods.

Eine zur Ausübung des erfindungsgemäßen Hygienisierungsverfahrens vorgesehene Einrichtung ist durch die Verwendung folgender Einzelgruppen gekennzeichnet:One for practicing the sanitation method according to the invention envisaged facility is through the use of the following Individual groups marked:

  • a) einem Rohrgehäuse mit einem zum Anbau an ein Silo geeigneten Flansch oder einem zur Aufgabe von Sackware geeigneten Trichter;a) a pipe housing with a suitable for mounting on a silo Flange or one for sacking suitable funnel;
  • b) einem im vorderen Gehäuseteil eingebauten Dosier- und Auflockerungswendel;b) a metering device installed in the front housing part and loosening coil;
  • c) der im hinteren Teil angeordneten Schlammaufgabestelle;c) the sludge feed point located in the rear part;
  • d) dem ebenfalls im hinteren Teil eingebauten Durchlaufmischer.d) the continuous mixer also installed in the rear part.

Der Durchlaufmischer kann mit beliebigen Mischwerkzeugen ausgestattet sein, wobei sowohl ein Fingerrührer in Ankerform mit zusätzlichen Fingern und Strombrechern, als auch ein schnellaufender Schraubenrührer mit mehreren schrägflächigen Flügeln denkbar ist.The continuous mixer can be equipped with any mixing tools be, with both a finger stirrer in anchor form with additional fingers and baffles, as well as a high-speed one Screw stirrer with several inclined blades is conceivable.

Das erfindungsgemäße Verfahren und seine zur Ausübung erforderliche Einrichtung werden anhand der beigefügten Systemskizzen näher schematisch erläutert.The method according to the invention and its necessary for the exercise Setup are based on the attached system sketches schematically explained in more detail.

Fig. 1 zeigt: die Einrichtung vorgesehen zum Anbau an ein Kalksilo. Fig. 1 shows: the device intended for attachment to a lime silo.

Fig. 2 zeigt: die Einrichtung bei Verwendung von Sackware. Fig. 2 shows the device when using sacks.

Die Einrichtung 1 besteht aus Einlauf mit Anbauflansch für das Silo 1, wobei der Kern im Einlaufbereich ein Dosierwendel 2 in Verbindung mit einem Auflockerungswendel 3 ist. The device 1 consists of an inlet with a mounting flange for the silo 1 , the core in the inlet area being a metering spiral 2 in connection with a loosening spiral 3 .

Im Austragsbereich ist die Einrichtung mit dem Schlammaufgabestutzen 4 versehen. In diesem Bereich ist ebenfalls das Mischorgan 5 untergebracht.In the discharge area, the device is provided with the sludge feed nozzle 4 . The mixing element 5 is also accommodated in this area.

Die Fig. 2 zeigt die Einrichtung in der Abänderung dergestalt, daß anstelle des Anbauflansches für das Silo ein Aufgabetrichter 1 für Sackware angeordnet ist. Fig. 2 shows the device in the modification such that a feed hopper 1 for bagged goods is arranged instead of the mounting flange for the silo.

Claims (10)

1. Verfahren zum Hygienisieren von Klärschlamm durch Zugabe von Kalkhydrat dadurch gekennzeichnet, daß das Kalkhydrat in pulvriger Form zugegeben wird.1. A method for sanitizing sewage sludge by adding hydrated lime, characterized in that the hydrated lime is added in powder form. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Komponenten Klärschlamm und Kalkhydrat in einem kombinierten Dosier- und Mischaggregat zusammengebracht werden.2. The method according to claim 1, characterized in that that the components sewage sludge and hydrated lime in one combined dosing and mixing unit brought together will. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtung direkt an einem Kalksilo angebaut wird.3. The method according to claim 1, characterized in that the facility is grown directly on a lime silo becomes. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtung mit Sackware beschickt wird.4. The method according to claim 1, characterized in that the device is loaded with bagged goods. 5. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1, gekennzeichnet durch die Verbindung der Einzelgruppen Dosier- und Auflockerungsgerät und das Mischorgan in einem gemeinsamen Gehäuse.5. A device for performing the method according to claim 1, characterized by the connection of the individual groups Dosing and loosening device and the mixing element in one common housing. 6. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Einzelgruppen Dosier- und Auflockerungsgerät und das Mischorgan gemeinsam angetrieben werden. 6. Device according to claim 5, characterized in that the individual groups dosing and loosening device and the mixing element are driven together.   7. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Einzelgruppen Dosier- und Auflockerungsgerät und das Mischorgan getrennt angetrieben werden (Fig. 3 + 4).7. Device according to claim 5, characterized in that the individual groups metering and loosening device and the mixing element are driven separately ( Fig. 3 + 4). 8. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Mischwerkzeug des Durchlaufmischers ein Fingerrührer in Ankerform mit zusätzlichen Fingern und Strombrechern ist.8. Device according to claim 5, characterized in that the mixing tool of the continuous mixer is a finger stirrer in anchor form with additional fingers and baffles is. 9. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Mischwerkzeug des Durchlaufmischers ein schnellaufender Schraubenrührer mit mehreren schrägflächigen Flügeln ist.9. Device according to claim 5, characterized in that the mixing tool of the continuous mixer is a high-speed Screw stirrer with several inclined surfaces Wings is. 10. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Mischwerkzeug des Durchlaufmischers ein Doppelwellenmischer mit beliebig ausgebildeten Mischorganen ist.10. Device according to claim 5, characterized in that the mixing tool of the continuous mixer is a twin-shaft mixer with any trained mixing organs.
DE19853546274 1985-12-28 1985-12-28 Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process Withdrawn DE3546274A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853546274 DE3546274A1 (en) 1985-12-28 1985-12-28 Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853546274 DE3546274A1 (en) 1985-12-28 1985-12-28 Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process

Publications (1)

Publication Number Publication Date
DE3546274A1 true DE3546274A1 (en) 1987-07-02

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ID=6289655

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853546274 Withdrawn DE3546274A1 (en) 1985-12-28 1985-12-28 Process for rendering sewage sludge hygienic by adding powdered hydrated lime, and a device for carrying out the process

Country Status (1)

Country Link
DE (1) DE3546274A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478147A (en) * 1995-04-13 1995-12-26 E. D. Etnyre & Co. Portable mixer for mixing ground rubber into liquid asphalt
WO1997030008A1 (en) * 1996-02-13 1997-08-21 Biopartner As A method and apparatus for treating liquid-containing material based on organic waste products
DE19616470A1 (en) * 1996-04-22 1997-10-23 Ruediger Schwenk Sludge conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478147A (en) * 1995-04-13 1995-12-26 E. D. Etnyre & Co. Portable mixer for mixing ground rubber into liquid asphalt
WO1997030008A1 (en) * 1996-02-13 1997-08-21 Biopartner As A method and apparatus for treating liquid-containing material based on organic waste products
US6099741A (en) * 1996-02-13 2000-08-08 Biopartner As Method and apparatus for treating liquid-containing material based on organic waste products
US6299782B1 (en) 1996-02-13 2001-10-09 Conterra As Method and apparatus for treating liquid-containing material based on organic waste products
DE19616470A1 (en) * 1996-04-22 1997-10-23 Ruediger Schwenk Sludge conditioner

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