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WO2003064004A1 - Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique - Google Patents

Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique Download PDF

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Publication number
WO2003064004A1
WO2003064004A1 PCT/FI2003/000069 FI0300069W WO03064004A1 WO 2003064004 A1 WO2003064004 A1 WO 2003064004A1 FI 0300069 W FI0300069 W FI 0300069W WO 03064004 A1 WO03064004 A1 WO 03064004A1
Authority
WO
WIPO (PCT)
Prior art keywords
spheres
reactor
mass
set forth
organic mass
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/FI2003/000069
Other languages
English (en)
Inventor
Hannu L. Suominen
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.)
BCDE Group Waste Management Ltd Oy
Original Assignee
BCDE Group Waste Management Ltd Oy
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 BCDE Group Waste Management Ltd Oy filed Critical BCDE Group Waste Management Ltd Oy
Publication of WO2003064004A1 publication Critical patent/WO2003064004A1/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
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • 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
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/145—Feedstock the feedstock being materials of biological origin
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Definitions

  • the invention relates to a method for cleaning the exhaust gases of a bio- oxidizer, said method comprising oxidizing organic mass by means of microbes in a bio-oxidation reactor, which is supplied not only with organic mass but also with dry warm air and from which is discharged hot wet gas.
  • the organic mass can be further provided with a recyclable oxidation surface.
  • the invention relates also to an apparatus for cleaning the exhaust gases of a bio-oxidizer, said apparatus comprising a bio-oxidation reactor, means for supplying organic mass to an inlet end of the oxidation reactor, means for supplying dry warm air to the inlet and/or outlet end of the oxidation reactor, a fan for vacuuming a hot wet exhaust gas from the outlet and/or inlet end of the oxidation reactor, means for cleaning the exhaust gas, and a heat recovery unit for the transfer of heat from the exhaust gas to the supply air.
  • the apparatus is provided with ionizing particle separators for cleaning the exhaust gas.
  • a problem is how to clean exhaust gases of particulate and gaseous impurities.
  • Particles can be e.g. microbial germs or other very small organic or inorganic particles. Harmful gaseous substances may include e.g. ammonia, methane, or hydrogen sulphide.
  • Harmful gaseous substances may include e.g. ammonia, methane, or hydrogen sulphide.
  • the elimination of both particles and harmful gases from a gas mixture to be cleaned is particularly problematic.
  • the removal of small particles ( ⁇ 0,3 ⁇ m) from air is difficult with conventional air cleaners. Filters become blocked quickly, especially in the process of cleaning moist air, and the cleaning and replacement thereof requires a lot of work. Cleaning of gases is prior known by means of gas scrubbers, but e.g. methane, hydrogen sulphide, and ammonia are often present in such large amounts that the process requires powerful and expensive gas scrubbers, which nevertheless do not provide a sufficient degree of cleaning.
  • gases can be discharged to the environment in an particle-free and odourless state.
  • organic mass has a low dry content, e.g. 2%-25% of organic sludges
  • another problem is how to provide oxidation sufficiently powerful for microbial activity.
  • This problem has been addressed by supplying the sludge mass with various builders, such as chips, peat, etc., but an optimal oxidation rate is not obtained by the shape and amount of these builders.
  • the inventive method and apparatus can be additionally used for improving the oxidation rate of the process or the oxygen supply to microbes, such that the entire oxidation process becomes faster and a substantial increase in production capacity is obtained.
  • a tank 1 is supplied with organic mass to be oxidized, which may especially comprise sludge from a sewage treatment plant or liquid manure from farming.
  • the tank 1 is also supplied with a continuous flow of spheres, which comprises spheres 12 of a biologically non-oxidizing material, whose diameter is within the range of 1-5 cm, most conveniently about 2-4 cm, and whose surface has been roughened for enhancing the adherence of organic mass to spherical surfaces.
  • the flow constituted by the spheres 12, is admixed e.g. by means an elevating twin-screw conveyor 2 with an organic mass before feeding the flow of spheres, and the organic mass admixed therewith, from a supply tank 3 by means of a feed conveyor 4 to the inlet end of a biological oxidation reactor 5.
  • the reactor drum 5 is driven in a slow rotating motion, e.g. 4 r/h, while resting on wheels 6.
  • the reactor 5 has its interior provided with adjustable paddles 7, having an extent and design appropriate for mixing spheres and mass, while advancing the same at a suitable speed.
  • the residence time of mass in the reactor 5 can be two or three days, as opposed to 8-10 days it used to be prior to the enhancement of oxidation according to the invention.
  • the enhancement of oxidation is based on the fact that the organic mass is primarily present as thin layers 23 adhered or bonded to the surfaces of the spheres 12, resulting in a substantially increased oxidation area.
  • Another contributing factor is the spherical form of the spheres 12, by virtue of which the inter-sphere air space is larger than the volume of mass to be oxidized.
  • the mass layer present on spherical surfaces has a thickness which is typically only about 2 mm or less. While, in the prior art, the question was about providing more oxidation surface within the mass, the inventive concept is about admixing the organic mass within a flow of spheres.
  • the spheres must be composed of a high melting material, such as polyethylene or nylon.
  • the surface is provided with bonding formations, such as recesses, which further increase the surface area and ensure the adherence of mass to the surface.
  • the reactor 5 should contain as little as possible of such mass which is not included in the layers 23 bonded to the surface of the spheres 12.
  • the mass, oxidized in the oxidation reactor 5, and the spheres 12 are delivered into a drying drum 9, which is driven rotatingly at a speed, e.g. 200 r/h, which is multiple with respect to the reactor's 5 rotation speed.
  • the drying drum 9 is provided with internal paddles 9a for removing oxidized mass from the surfaces of the spheres 12.
  • the oxidized mass and the spheres are delivered to a drum screen 10 for separating the spheres 12 and a finished mass 11 from each other.
  • the screen 10 has a screwthread on its inner surface for discharging the spheres out of the screen's outlet end, and the mass flows through the screen jacket.
  • the spheres 12 are returned by means of a return conveyor 13 back into the tank 1, from which the twin-screw conveyor 2 carries a flow of spheres and organic mass, while mixing the same together, up into the supply tank 3.
  • the twin-screw conveyor 2 By virtue of the inclination of the twin-screw conveyor 2, there will occur certain reflowing of mass and spheres, which enhances mixing for supplying the reactor 5 with spheres 12 having a special coating of sludge 23.
  • the spheres 12 In the reactor 5, the spheres 12 must have a volume which exceeds that of the organic mass 23.
  • the spheres 12 may be hollow, but the specific gravity thereof must be adapted to be as close as possible to that of the organic mass.
  • a hot wet gas to be discharged from the reactor 5 is cleaned by means of ionizing particle separators 14, 24 and 16.
  • the operating principle of ionizing particle separators is such that the particles, present in a gas flowing through a separating chamber, are charged and the charged particles are collected by means of an electric field on energized collector surfaces, from which the particles are flushed with water and the water is discharged to receivers and/or further treatment processes, which do not constitute objects for this invention.
  • a fan 15 for establishing a negative pressure in the first particle separator 14, in the reactor 5, in a supply air inlet duct 22, and in the enclosed assembly 1-4 at the inlet end.
  • the exhaust gases are cleaned by the ionizing particle separators 14 and 24 sufficiently for fans 15 and 25.
  • a singlet oxygen generator 17, downstream of the fans 15 and 25, and a second ionizing particle separator 16 are capable of cleaning the exhaust air effectively of the remainder of small particles, odours, and bacteria.
  • E represents energy.
  • the formation and amount of ozone in exhaust air is monitored continuously by means of a monitor.
  • the exhaust gas is monitored for its moisture and temperature by means of hygro- and thermometers 19, which enable controlling the process, such as the fan's 15 rotation speed and the reactor's 5 rotation speed and direction.
  • the process equipment is subjected to vacuuming air from its odour- generating parts by means of a pipe 29, which connects with a duct between the ionic cleaners upstream of the singlet oxygen generator 17.
  • Heat is transferred from the cleaned exhaust gas to the reactor's 5 supply air by means of a heat recovery unit 18.
  • Fresh air is drawn from outside by way of a pipe 20.
  • the dry fresh air, warmed up in the heat recovery unit 18, is carried by way of a duct 22 to the composter's 5 inlet end.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Fertilizers (AREA)
  • Treating Waste Gases (AREA)

Abstract

L'invention concerne un procédé et un appareil de nettoyage des gaz d'échappement d'un comburant biologique. Une masse organique est oxydée dans un réacteur de bio-oxydation (5) approvisionné en air chaud sec et duquel un gaz humide chaud est déchargé. Pour obtenir une oxydation améliorée de la masse organique, le réacteur contient des sphères (12) biologiquement non oxydants, dont le volume excède celui de la masse organique à oxyder. Ainsi, la masse organique est pourvue d'une grande zone d'oxydation, étant donné que la masse organique présente principalement des couches minces (23) liées à des surfaces des sphères (12). Une oxydation améliorée nécessite une nettoyage effectif d'un gaz d'échappement. Le gaz d'échappement est nettoyé au moyen de séparateurs de particules ionisants et d'un générateur d'oxygène singulet. Une unité de récupération de la chaleur (18) est utilisée pour transférer la chaleur du gaz d'échappement à l'alimentation d'air.
PCT/FI2003/000069 2002-01-30 2003-01-29 Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique Ceased WO2003064004A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20020169A FI20020169A0 (fi) 2002-01-30 2002-01-30 Menetelmõ ja laite orgaanisen massan hapettamiseksi
FI20020169 2002-01-30

Publications (1)

Publication Number Publication Date
WO2003064004A1 true WO2003064004A1 (fr) 2003-08-07

Family

ID=8562967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2003/000069 Ceased WO2003064004A1 (fr) 2002-01-30 2003-01-29 Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique

Country Status (2)

Country Link
FI (1) FI20020169A0 (fr)
WO (1) WO2003064004A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105967490A (zh) * 2016-06-27 2016-09-28 东方电气集团东方锅炉股份有限公司 一种湿质有机废弃物的处理方法及连续式处理系统
WO2019169425A1 (fr) * 2018-03-09 2019-09-12 Green Eco International Pty Ltd Système et procédé de décomposition de déchets alimentaires

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039461A1 (fr) * 1980-05-05 1981-11-11 Kunststofftechnik KG Procédé et dispositif pour l'épuration de l'air usé
EP0358006A1 (fr) * 1988-08-26 1990-03-14 Hydrotechnik Gmbh Procédé et dispositif pour purifier des gaz d'échappement d'un sécheur
WO1991016282A1 (fr) * 1990-04-12 1991-10-31 Biodata Oy Composteur
EP0740963A2 (fr) * 1995-05-02 1996-11-06 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Installation pour la purification des gaz d'échappement chargés de poussières
EP1151785A2 (fr) * 2000-05-04 2001-11-07 Vapo Oy Procédé pour la purification de gaz produits dans un procédé de compostage et pour la récupération de chaleur
WO2002028515A1 (fr) * 2000-10-03 2002-04-11 Scheuch Gmbh Installation d'epuration de rejets gazeux

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039461A1 (fr) * 1980-05-05 1981-11-11 Kunststofftechnik KG Procédé et dispositif pour l'épuration de l'air usé
EP0358006A1 (fr) * 1988-08-26 1990-03-14 Hydrotechnik Gmbh Procédé et dispositif pour purifier des gaz d'échappement d'un sécheur
WO1991016282A1 (fr) * 1990-04-12 1991-10-31 Biodata Oy Composteur
EP0740963A2 (fr) * 1995-05-02 1996-11-06 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Installation pour la purification des gaz d'échappement chargés de poussières
EP1151785A2 (fr) * 2000-05-04 2001-11-07 Vapo Oy Procédé pour la purification de gaz produits dans un procédé de compostage et pour la récupération de chaleur
WO2002028515A1 (fr) * 2000-10-03 2002-04-11 Scheuch Gmbh Installation d'epuration de rejets gazeux

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105967490A (zh) * 2016-06-27 2016-09-28 东方电气集团东方锅炉股份有限公司 一种湿质有机废弃物的处理方法及连续式处理系统
WO2019169425A1 (fr) * 2018-03-09 2019-09-12 Green Eco International Pty Ltd Système et procédé de décomposition de déchets alimentaires
AU2018411732B2 (en) * 2018-03-09 2020-07-09 Green Eco International Pty Ltd System and method for food waste decomposition
GB2585612A (en) * 2018-03-09 2021-01-13 Green Eco Int Pty Ltd System and method for food waste decomposition
GB2585612B (en) * 2018-03-09 2022-10-26 Green Eco Int Pty Ltd System and method for food waste decomposition
US12377420B2 (en) 2018-03-09 2025-08-05 Green Eco International Ltd System and method for food waste decomposition

Also Published As

Publication number Publication date
FI20020169A0 (fi) 2002-01-30

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