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WO2013082690A1 - Procédé de traitement de déchets bio-organiques - Google Patents

Procédé de traitement de déchets bio-organiques Download PDF

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Publication number
WO2013082690A1
WO2013082690A1 PCT/CA2012/000728 CA2012000728W WO2013082690A1 WO 2013082690 A1 WO2013082690 A1 WO 2013082690A1 CA 2012000728 W CA2012000728 W CA 2012000728W WO 2013082690 A1 WO2013082690 A1 WO 2013082690A1
Authority
WO
WIPO (PCT)
Prior art keywords
product
drying
organic material
produce
sewage sludge
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/CA2012/000728
Other languages
English (en)
Inventor
Robert Sampson
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.)
N Viro Systems Canada LP
Original Assignee
N Viro Systems Canada LP
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 N Viro Systems Canada LP filed Critical N Viro Systems Canada LP
Publication of WO2013082690A1 publication Critical patent/WO2013082690A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • 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
    • 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
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/02—Combustion or pyrolysis
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/06—Heat exchange, direct or indirect
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08—Drying or removing water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/10—Recycling of a stream within the process or apparatus to reuse elsewhere therein
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/52—Hoppers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the invention relates to the field of bio-organic waste diversion. BACKGROUND OF THE INVENTION
  • An improved method for drying an organic material using a dryer is disclosed and forms one aspect of the invention.
  • the method is of the type wherein a relatively dry material is mixed with the organic material to produce a mixture and the mixture is subjected to a drying process in the dryer to produce a granular product.
  • the organic material is of the type which, if subjected itself to the drying process, would agglomerate.
  • the improvement comprises: use of the organic material, said organic material having been previously dried, as the relatively dry material.
  • the mixture can have less than 60% water by weight.
  • the relatively dry material can have less than 40% water by weight.
  • the granular product can have less than 20% water by weight.
  • the granular product can have less than 10% water by weight.
  • the granular product can have more than 30% solids by weight and less than 70% solids by weight.
  • the granular product can be used as the relatively dry material.
  • the method can be used for drying sewage sludge.
  • the sewage sludge can be raw sewage sludge.
  • the product made by the use of the method can form yet another aspect of the invention and can be used, according to another aspect of the invention, as a fuel for a combustion power plant to produce electricity and ash.
  • An improved method for producing a fertilizer from an organic material forms another aspect of the invention.
  • This method is of the type wherein an alkaline material is blended with the organic material to produce a blend and the blend is subjected to a drying process to produce a granular fertilizer product.
  • the improvement comprises use of the ash as the alkaline material.
  • FIG. 1 is a schematic of a closed-loop waste-to-energy conversion process according to an exemplary embodiment of the invention.
  • FIG. 2 is a photograph of the product indicated by reference numeral 26 in FIG. 1.
  • FIG. 1 Reference is now made to FIG. 1 and the exemplary embodiment 20 illustrated therein in schematic form, which will seen to include:
  • a pug mixer 38 feeding a mixture 40 [52% water by weight] to a rotary dryer 42 and to be characterized in that: a portion 44 of the relatively dry granular fuel product material exiting the dryer [10% water by weight] is mixed as a recycle stream with the portion 24A of the incoming bio-organic waste stream [80% water by weight] so as to produce the 52% water mixture delivered to the pug mixer 38; and the use of waste heat 39 from the energy-production operation 28.
  • the drying operation illustrated schematically does not suffer from balling, agglomeration and caking and thus operates relatively economically, i.e. excess cleaning-associated downtime is not a problem.
  • the fuel product 26 itself has a consistency as shown in FIG.2 and will be seen to have the appearance of pebbles or pea gravel, and to be of a size distribution that is relatively easily handled through conventional materials handling equipment.
  • An advantageous drying cycle involves: the pasteurization of the material at above 70°C for at least 30 minutes, to destroy pathogens, thereby to minimize the need for special handling procedures.
  • the exemplary energy production operation 28 same will be seen to involve the combustion of the granular fuel product 26 to produce electricity 32 and ash 30, and, surprisingly, to be characterized by the absence of a supplemental fuel.
  • bio-organic-derived fuels of the prior art typically require supplemental fuel as a result of (i) insufficient granularity; or (ii) the inert materials introduced as part of the drying process, both impacting negatively on combustion characteristics
  • the fuel product of the present invention has been demonstrated to be capable of self-sustained combustion with negligible hydrocarbon emissions [combustion efficiency estimated at 99.3% based on char carbon content of the ashes and CO and methane concentrations in the flue gas] in a vibrating grate style stoker and combustor at an above bed combustion temperature of 1730 F.
  • the specific characteristics of the fuel product 26 combusted above are as follows:
  • the exemplary fertilizer production operation 34 will be understood to involve, inter alia, the blending of a portion 24B of the bio-organic material with an alkaline material in a manner similar to that described in detail in Canadian Patent 2,410,814, incorporated herein by reference, but to be characterized by the use of the ash 30 from the combustion process as the alkaline material, generating a true closed-loop process.
  • the blend 43 is dried in another rotary dryer 42, again fired using waste heat 41 from the energy-production operation 28.
  • the quantity of the recycle stream 44 will vary, inter alia, with the moisture content of the granular fuel product 26 exiting the dryer and the moisture content of the incoming bio-organic waste stream 24, but as a general rule, it has been found that if the mix produced by the mixer 38 in the drying operation 22 has no more than about 60% water by weight, the drying operation will work effectively and permit drying of the blend to 10% water content or less in conventional dryers
  • the granular product is dried to 10% water content or less, but this is not necessary; drying to 40% water content or less allows for the product to be stored for later use as a recycle stream, to seed the process; drying to 20% water content or less requires less energy than drying to 10% water content or less while providing a product that is capable of self-sustained combustion at least in combustors such as fluidized bed combustors ; drying to 10% water content or less relatively reliably provides a product that is capable of self-sustained combustion in at least some common combustors, such as stokers; drying to 30-50% solids produces a product that is easily stored and suitable for land application via conventional methods
  • the exemplary drying process uses waste heat from the energy-production process, this is not necessary; any form of inexpensive heat can advantageously be used.
  • rotary dryers are specified, this is not necessary.
  • Other types of dryers can be utilized; the dryer can be a direct dryer or an indirect dryer; and can further include direct concurrent flow dryers, horizontal single, double and triple pass indirect dryers, and vertical counter flow dryers.
  • Suitable organic wastes will typically range between 15 and 30% solids: this can originate with, for example, only:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un procédé amélioré permettant de sécher des déchets bio-organiques au moyen d'un dispositif de séchage. Le procédé consiste à mélanger une matière relativement sèche à la matière organique pour produire un mélange, et à soumettre le mélange à un processus de séchage dans le dispositif de séchage pour produire un produit granulaire, la matière organique étant de celles qui s'agglomèrent si elles sont soumises à un processus de séchage. L'amélioration consiste à utiliser comme matière relativement sèche la matière organique, cette dernière ayant été préalablement séchée.
PCT/CA2012/000728 2011-12-08 2012-08-03 Procédé de traitement de déchets bio-organiques Ceased WO2013082690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,761,397 2011-12-08
CA2761397A CA2761397A1 (fr) 2011-12-08 2011-12-08 Procede de traitement de dechets bio-organiques

Publications (1)

Publication Number Publication Date
WO2013082690A1 true WO2013082690A1 (fr) 2013-06-13

Family

ID=48573442

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2012/000728 Ceased WO2013082690A1 (fr) 2011-12-08 2012-08-03 Procédé de traitement de déchets bio-organiques

Country Status (2)

Country Link
CA (1) CA2761397A1 (fr)
WO (1) WO2013082690A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963471A (en) * 1974-06-19 1976-06-15 Hampton Quentin L Apparatus and process for producing an organic product from sewage sludge
US4852269A (en) * 1986-10-29 1989-08-01 Enviro-Gro Technologies, Inc. Combined sewage and lime slude treatment process
US5435923A (en) * 1992-03-20 1995-07-25 Bio Gro Systems, Inc. Method for the treatment of sewage sludge and the like
DE19934381A1 (de) * 1999-05-20 2000-11-23 Josef Merai Verfahren und Anlage zur Vorbehandlung, Pelletierung und Trocknung von Industrieschlämmen für die Wiederverwertung
US20020152937A1 (en) * 2001-04-23 2002-10-24 Logan Terry J. Processes and systems for using biomineral by-products as a fuel and for NOx removal at coal burning power plants
US20030196577A1 (en) * 2002-03-08 2003-10-23 Lefcort Malcolm D. Two-stage wet waste gasifier and burner
US20050067348A1 (en) * 2003-09-25 2005-03-31 Logan Terry J. Method and system for treating sludge using recycle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963471A (en) * 1974-06-19 1976-06-15 Hampton Quentin L Apparatus and process for producing an organic product from sewage sludge
US4852269A (en) * 1986-10-29 1989-08-01 Enviro-Gro Technologies, Inc. Combined sewage and lime slude treatment process
US5435923A (en) * 1992-03-20 1995-07-25 Bio Gro Systems, Inc. Method for the treatment of sewage sludge and the like
DE19934381A1 (de) * 1999-05-20 2000-11-23 Josef Merai Verfahren und Anlage zur Vorbehandlung, Pelletierung und Trocknung von Industrieschlämmen für die Wiederverwertung
US20020152937A1 (en) * 2001-04-23 2002-10-24 Logan Terry J. Processes and systems for using biomineral by-products as a fuel and for NOx removal at coal burning power plants
US20030196577A1 (en) * 2002-03-08 2003-10-23 Lefcort Malcolm D. Two-stage wet waste gasifier and burner
US20050067348A1 (en) * 2003-09-25 2005-03-31 Logan Terry J. Method and system for treating sludge using recycle

Also Published As

Publication number Publication date
CA2761397A1 (fr) 2013-06-08

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