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WO2008119733A2 - Procédé pour sécher une biomasse humide - Google Patents

Procédé pour sécher une biomasse humide Download PDF

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Publication number
WO2008119733A2
WO2008119733A2 PCT/EP2008/053639 EP2008053639W WO2008119733A2 WO 2008119733 A2 WO2008119733 A2 WO 2008119733A2 EP 2008053639 W EP2008053639 W EP 2008053639W WO 2008119733 A2 WO2008119733 A2 WO 2008119733A2
Authority
WO
WIPO (PCT)
Prior art keywords
biomass
clinker
drying
cement clinker
air
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/EP2008/053639
Other languages
German (de)
English (en)
Other versions
WO2008119733A3 (fr
Inventor
Matthias Mersmann
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of WO2008119733A2 publication Critical patent/WO2008119733A2/fr
Publication of WO2008119733A3 publication Critical patent/WO2008119733A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/47—Cooling ; Waste heat management
    • C04B7/475—Cooling ; Waste heat management using the waste heat, e.g. of the cooled clinker, in an other way than by simple heat exchange in the cement production line, e.g. for generating steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • 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
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
    • F26B3/205—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor the materials to be dried covering or being mixed with heated inert particles which may be recycled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • F23G2201/101—Drying by heat using indirect heat transfer
    • 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
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
    • 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
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
    • 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
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a method for drying moist biomass, in particular of fibrous plant constituents, is used in the industrial waste heat for heating the biomass to be dried, being driven by the heating of the aqueous fraction of the biomass.
  • the cement industry needs large quantities of fuel to produce cement.
  • low-cost fuels are used, and the manufacturing process allows the use of lower-value fuels, that is, fuels that are generally difficult to handle.
  • biomass As a fuel, since biomass released during the combustion of CO 2 before taken from the atmosphere.
  • the biogenic fuels such as biomass are suitable only to a limited extent for direct combustion, since these fuels must be prepared appropriately before use.
  • biomass is understood as meaning any biogenic material, but in particular understood as fibrous plant material, but also, if appropriate, animal meal or other biogenic substances. If the selected fuels are fibrous biomass, the treatment, comminution and drying, which in principle are either lengthy or energy- is intense, or it is very elaborate. Since the biomass must be dried intensively due to the high water content, the use of biomass fuels in the cement industry is currently only economically feasible in exceptional cases.
  • the object of the invention is therefore to provide an economical method for drying biomass, the specifics of the cement industry to be considered.
  • the object of the invention is achieved by the use of the residual heat of the cement clinker in cement clinker production, which is taken at the end of the production process.
  • the invention proposes to remove the residual heat from the cement clinker at the end of the cement clinker production process.
  • the unground cement clinker which usually has a particle size of less than Millimeters to a few centimeters, is used to dry the biomass.
  • various methods are suitable to remove the residual heat in the clinker.
  • the cement clinker is used to make a hydraulic binder, the cement clinker resulting from the rotary kiln is sufficiently insensitive to moisture for the proposed use. This is due to the fact that the cement clinker itself has a glazed structure on the surface and that the surface of the coming from the rotary kiln cement clinker is very low. Thus, despite the presence of a certain water vapor partial pressure, premature setting does not occur because the cement must be finely ground for further processing of the clinker to be cementable.
  • An advantage of the use of cement clinker as a heat source for drying biomass is that the cement clinker at the end of cement clinker production residual heat between 80 0 C and 300 0 C has.
  • This temperature window is usually uninteresting for heat recovery due to only small temperature gradients. For this reason, the heat in the unattractive temperature window of 80 0 C to 300 0 C is usually discarded in the free atmosphere. But this temperature window is attractive for drying biomass, since it is not to be expected at these temperatures that possibly completely through-dried biomass ignites itself.
  • the initially still moist biomass is culled and crushed either to a few centimeters long straws to fine straw up to fine particles of a few millimeters in diameter.
  • the ideal size should not be too large for a subsequent separation of biomass and clinker by a classifier is possible, the fibrous components of the biomass should not tend to entanglement, so that they do not clinker clinging and on the other hand, the crushed biomass should not Too small a particle size, so that the biomass is still easy to handle.
  • a solid-bed heat exchanger is used in the process according to the invention.
  • the granular cement clinker in the form of granules is contacted directly with the prepared biomaterial and, if necessary, mixed and agitated. This can be done by shaking, rotating in a rotary tube or otherwise.
  • the heat from the cement clinker granules is transferred to the biomass and the biomass dries out.
  • the biomass is separated from the cement clinker and the biomass can then be introduced into the process of cement production.
  • the biomass and the cement clinker are transferred to a heat exchanger where the cement clinker is in direct contact with the biomass.
  • the moisture is driven out of the biomass by direct transfer of heat from the cement clinker to the biomass.
  • drying air is introduced into the heat exchanger, wherein the drying air, the biomass and the cement clinker are mixed together.
  • the drying air absorbs the resulting vapor during drying and removes them from the heat exchanger.
  • the dried biomass is blown out of the cement clinker downright, the denser cement clinker falling down in the separator and on this In this way, the cement clinker, which preferably consists of the larger fraction of the cement clinker granules, is removed from the biomass, the biomass being absorbed in the drying air.
  • a Nachsichter is used, in which case an separator can be used in an advantageous embodiment of the invention, which separates the dried biomass on the one hand and the drying air on the other hand.
  • the clinker from the converter which is discharged with the drying air, preferably using a Querstromsichters, separated from the himendenendes biomass.
  • this is available for the cement clinker production and can be blown in a known manner, for example in the calciner at the appropriate place where the biomass burns and contributes to the calcination of the limestone.
  • the invention is illustrated by the following process scheme. It shows:
  • FIG. 1 shows a process diagram of the biomass drying according to the invention.
  • FIG. 1 shows a diagram of the biomass drying according to the invention.
  • the cold clinker (s), moist biomass (r), and drying air (i) originating from the production process flow into a converter (4) in order to dry the moist biomass (r) according to the invention.
  • a converter (4) in order to dry the moist biomass (r) according to the invention.
  • cold clinker (e) which still has a residual heat at a temperature of 80 0 C to 300 0 C, passed to a sieve (2) to there a fine-grained (f) and to separate a coarse-grained fraction (g) of the cement clinker granules.
  • the clinker cooler (1) operates in a known manner in which cooling air (c) is passed into the clinker cooler (1), the recycled air (a) being returned to the cement clinker production process.
  • cooling air (c) is passed into the clinker cooler (1), the recycled air (a) being returned to the cement clinker production process.
  • the fine fraction (f) of the cement clinker is removed for further processing and the coarse fraction (g) of the cement clinker is passed into a converter (4).
  • moist biomass (r) is passed to a mill (3) where the moist biomass (r) is ground or chopped.
  • the moist biomass (r) in the mill (3) After the moist biomass (r) in the mill (3) has been chopped or ground, it emerges as fine biomass (h) from the mill (3) and is also passed into the converter (4), in which also drying air ( i) is passed.
  • the coarse fraction (g) of the clinker from the sieve (2) is mixed in direct contact with the fine biomass (h) and optionally agitated.
  • the biomass discharged from the mixture of biomass and air (j) pneumatically discharged with the drying air (i) is next deposited in a separator (5).
  • the clinker (I) discharged under the influence of gravity from the converter (4) and the coarse biomass (k) also exiting in this way are passed into a separator (6) into which the exhaust air (m) is also introduced from the separator (5) becomes.
  • the separator (6) serves as a classifying air to separate the clinker (s) from the biomass. While the clinker (s) released from the biomass leaves the sifter pointing downwards, the biomass with the classifying air (o) is pneumatically discharged from the sifter.
  • a downstream separator (7) the biomass is separated from the air, so that ultimately the biomass in the product streams (s) and (q) is present.
  • the air (p) originating from the separator (7), which carries the vapors from the drying, can optionally be subjected to a condensation in order to remove the moisture of the biomass from the air.
  • the cement clinker may be sieved prior to combination with the biomass to use only coarse particles for drying.
  • the fine fraction (f) of the cement clinker heat for the drying of the wet biomass (r) is not available, but this can significantly improve the handling.
  • the radiator exhaust air (d) is completely or partially added to the drying of the biomass in the converter.
  • the cooler exhaust air (d) as drying air (i), whereby more heat is available for drying.
  • This use of the radiator exhaust air (d) can also happen after any heat extraction to close the air circulation.
  • cooler exhaust air (d) As drying air (i) for the drying process, it has proven to be advantageous to first dedust the cooler exhaust air (d).
  • the dedusting can be carried out in an advantageous manner by a combination of classifier and cyclone or filter. This prevents that finished cement clinker dust is returned to the process, whereby an energetically favorable process control is possible.
  • the dry biomass obtained in this process can be used as a low-cost fuel, preferably in the calcination zone.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Sustainable Development (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Microbiology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Sustainable Energy (AREA)
  • Processing Of Solid Wastes (AREA)
  • Drying Of Solid Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

L'invention concerne un procédé pour sécher une biomasse humide constituée en particulier de composants végétaux fibreux, consistant à utiliser une chaleur perdue industrielle pour chauffer la biomasse à sécher. Selon l'invention, le processus de chauffage permet de supprimer la partie aqueuse contenue dans la biomasse.
PCT/EP2008/053639 2007-03-29 2008-03-27 Procédé pour sécher une biomasse humide Ceased WO2008119733A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007015089A DE102007015089A1 (de) 2007-03-29 2007-03-29 Verfahren zur Trocknung feuchter Biomasse
DE102007015089.1 2007-03-29

Publications (2)

Publication Number Publication Date
WO2008119733A2 true WO2008119733A2 (fr) 2008-10-09
WO2008119733A3 WO2008119733A3 (fr) 2008-12-31

Family

ID=39719434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/053639 Ceased WO2008119733A2 (fr) 2007-03-29 2008-03-27 Procédé pour sécher une biomasse humide

Country Status (2)

Country Link
DE (1) DE102007015089A1 (fr)
WO (1) WO2008119733A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240174564A1 (en) * 2021-03-29 2024-05-30 Cicsa S.R.L. Method for the cooling and heat recovery from materials at very high temperature

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946131B1 (fr) 2009-05-29 2014-01-10 Inst Francais Du Petrole Procede de traitement thermique de biomasse avec un solide caloporteur.
DE102010002134B4 (de) 2010-02-18 2015-10-29 Christoph Kiener Verfahren und Mittel zur Trocknung feuchter, biomassehaltiger Substanzen
DE102012013877B4 (de) 2012-07-12 2020-11-05 Khd Humboldt Wedag Gmbh Verfahren zur Behandlung von Biomasse in einer Anlage zur Herstellung von Zement und dazu korrespondierende Anlage
DE102013105096A1 (de) 2013-05-17 2014-11-20 Thyssenkrupp Industrial Solutions Ag Verfahren zur Wärmebehandlung eines Materialstroms und zur Trocknung eines kohlenstoffhaltigen Stoffstroms
DE102014015535A1 (de) 2014-10-21 2016-04-21 Khd Humboldt Wedag Gmbh Anlage zur Herstellung von Zement mit Rückführung von belasteten Brüden in den thermischen Prozess

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DE3537595C3 (de) * 1985-10-23 1994-08-11 Alexander Dipl Ing Grisar Verfahren und Anlage zur Verwertung von feuchten Abfällen, insbesondere Klärschlamm
DE3542004A1 (de) * 1985-11-28 1987-06-04 Kloeckner Humboldt Deutz Ag Trocknung und verbrennung von schlaemmen beim brennprozess mineralischer stoffe
DE3708220A1 (de) * 1987-03-13 1988-09-22 Krupp Polysius Ag Verfahren und anlage zur ausnutzung der heizenergie von haus- und gewerbemuell
DE4321680C1 (de) * 1993-06-30 1994-04-14 Metallgesellschaft Ag Verfahren zum Trocknen eines wasserhaltigen Brennstoffs durch direkten Kontakt mit heißem, körnigem Feststoffrückstand
DE4442100A1 (de) * 1994-11-25 1996-05-30 Kleinholz & Co Verfahren und Anlage zur Aufbereitung von Klärschlamm zu einer Rohmehlkomponente für die Zementherstellung
JPH11500706A (ja) * 1995-10-31 1999-01-19 エー． ドウメ，ヨーゼフ セメントクリンカーの製造方法及び装置
DE29608816U1 (de) * 1996-05-15 1996-08-01 Deutsche Babcock Babcock Lentjes Kraftwerkstechnik GmbH Standort Berlin, 10407 Berlin Anordnung zur Nutzung der Abwärme von Zementklinkerlinien
DE19647484A1 (de) * 1996-11-16 1998-05-20 Deutz Ag Verfahren und Anlage zur Herstellung von Zement
US5976243A (en) * 1998-09-24 1999-11-02 Lafarge Canada Inc. Process for producing cement clinker containing blast furnace slag
DE19925565A1 (de) * 1999-06-04 2000-12-07 Ingbuero Fuer Abflus Klaeranla Verfahren und Anlagen zur energetischen Verwertung von Klärschlamm
US7461466B2 (en) * 2004-06-14 2008-12-09 Lehigh Cement Company Method and apparatus for drying wet bio-solids using excess heat from a cement clinker cooler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240174564A1 (en) * 2021-03-29 2024-05-30 Cicsa S.R.L. Method for the cooling and heat recovery from materials at very high temperature

Also Published As

Publication number Publication date
WO2008119733A3 (fr) 2008-12-31
DE102007015089A1 (de) 2008-10-02

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