WO2019166873A4 - Method and apparatus for biomass torrefaction - Google Patents

Method and apparatus for biomass torrefaction Download PDF

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Publication number
WO2019166873A4
WO2019166873A4 PCT/IB2019/000106 IB2019000106W WO2019166873A4 WO 2019166873 A4 WO2019166873 A4 WO 2019166873A4 IB 2019000106 W IB2019000106 W IB 2019000106W WO 2019166873 A4 WO2019166873 A4 WO 2019166873A4
Authority
WO
WIPO (PCT)
Prior art keywords
torrefaction
biomass
gas
chamber
conveyor belt
Prior art date
Application number
PCT/IB2019/000106
Other languages
French (fr)
Other versions
WO2019166873A1 (en
Inventor
Darko GORICANEC
Original Assignee
University of Maribor
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 University of Maribor filed Critical University of Maribor
Publication of WO2019166873A1 publication Critical patent/WO2019166873A1/en
Publication of WO2019166873A4 publication Critical patent/WO2019166873A4/en

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Classifications

    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • C10L9/083—Torrefaction
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/50—Screws or pistons for moving along solids
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The method and apparatus according to the invention in a preferred embodiment comprises a thermally insulated gas-tight chamber (10), further comprising two perforated endless conveyor belts (9) for transfer of biomass (4), wherein biomass torrefaction is utilized by recirculation of re-heated torrefaction gas and introducing the heat into said chamber (10) by means of forced convection heat transfer, wherein the heat is transferred by recirculated torrefaction gas and released directly to the biomass (4) dispensed on endless perforated conveyor belts (9) through the apertures on receiving surface of perforated endless conveyor belts (9). The target temperature of the torrefaction gas within the chamber (10) is established and maintained by waste heat utilization and by firing the torrefaction gas within primary heat releasing unit (16) comprising a gas burner (15) and incorporated heat exchanger. The biomass is preferably introduced and discharged from chamber (10) by means of a screw conveyor (2, 24), which essentially prevents ingress of air (i.e. oxygen) and loss of energy within the system.

Claims

AMENDED CLAIMS received by the International Bureau on 13 October 2019 (13.10.2019)
[Claim 1 ] A method for utilization of biomass (4) torrefaction process comprising the steps of: providing a thermally insulated and substantially gas-tight chamber (10) with at least one perforated endless conveyor belt (9) further comprising plurality of apertures on receiving surface; adding a biomass (4) to said chamber (10), wherein said biomass (4) is dispensed on receiving surface of said perforated endless conveyor belt (9); transporting the biomass through the chamber (10) by said perforated endless conveyor belt
(9); heating process for providing the heat for torrefaction process utilization; and heat releasing process for releasing the heat provided by said heating process to the interior of said chamber (10) by means of primary heat releasing unit (16) comprising a heat exchanger for utilization of forced convection heat transfer principle with aim to increase the temperature of the biomass (4) dispensed on said conveyor belt (9) to the required temperature for said torrefaction process utilization characterized in that,
said heating process further comprises a fuel combustion process, wherein fuel is fired in a gas burner (15) with aim to provide a source of heat for primary heat releasing unit (16) utilized in the heat releasing process, wherein high temperature waste heat of flue gas from gas burner (15) exhaust (11 ) system is transferred and released to the interior of chamber
(10) by said primary heat releasing unit (16) comprising at least one heat exchanger for process of biomass (4) torrefaction utilization, and wherein said flue gas from gas burner (15) exhaust (1 1 ) system is released to the ambient (A) without being released to the interior of chamber (10), and after at least a portion of the waste heat of flue gas was transferred to the interior of said chamber (10) for biomass (4) torrefaction process utilization; and wherein said method further comprises the process of collecting the torrefaction gas released from biomass (4) within said chamber (10), wherein at least a portion of collected torrefaction gas is within said heating process supplied by torrefaction gas supply line (14) and fired by gas burner (15) at least when the biomass torrefaction process within the chamber (10) is fully established.
[Claim 2] A method as in claim 1 characterized in that:
said heating process and combustion process further comprises a low temperature waste heat source utilization, where low temperature waste heat of exhaust (1 1 ) flue gas is preferably used for preheating the air supply (13) from ambient (A) required for combustion process utilization within gas burner (15), where additional secondary heat exchanger (12) is employed to increase the efficiency of thermal performance.
[Claim 3] A method as in claim 2 characterized in that:
said combustion process comprises external source of fuel in form of LPG or liquid gas with aim to initiate the process of biomass torrefaction, hence external source of fuel is used by gas burner (15) with aim to provide a heat for primary heat releasing unit (16), at least until the biomass torrefaction process within the chamber (10) is fully established.
[Claim 4] A method as in claim 1 characterized in that:
said heat releasing process further comprises a process of torrefaction gas recirculation within the chamber (10), wherein a prime mover is used for forced convection utilization where at least a portion of torrefaction gas if forced to flow through said primary heat releasing unit (16), and wherein at least a portion of torrefaction gas is forced to flow through the apertures of perforated endless conveyor belt (9), hence at least a portion of the heat introduced by primary heat releasing unit (16) is transferred within the chamber (10) by recirculation of torrefaction gas and released to the biomass (4) dispensed on said perforated endless conveyor belt (9) for biomass (4) torrefaction process utilization.
[Claim 5] A method as in claim 4 characterized in that:
said process of gas recirculation within said chamber (10) comprises the process of collecting the torrefaction gas, which is essentially released from biomass (4) being dispensed on perforated endless conveyor belt (9) within said process of biomass torrefaction, wherein collected torrefaction gas is guided by collector channel (6) to the inlet duct of said prime mover and furthermore, said torrefaction gas is reheated by primary heat releasing unit (16) for utilization of substantially continuous biomass torrefaction process.
[Claim 6] A method as in claim 5 characterized in that:
said process of gas recirculation comprises the process of supplying the reheated torrefaction gas through the heating gas supply line (20) to the inner space of said perforated endless conveyor belt (9), where the hot torrefaction gas is released for utilization of forced convection heating, and wherein the hot torrefaction gas is introduced to the biomass (4) being dispensed on the endless conveyor belt (9) through the apertures within the receiving surface of perforated endless conveyor belt (9).
[Claim 7] A method as in claim 6 characterized in that:
said process of gas recirculation comprises the process of gas pressure redistribution, wherein the inner space of said perforated conveyor belt (9) is used as a pressure redistribution chamber with aim to redistribute the hot torrefaction gas delivered by heating gas supply line (20) between the apertures of perforated endless conveyor belt (9) before said hot torrefaction gas is released through the apertures of said perforated endless conveyor belt (9) for forced convection heating of the biomass (4) being dispensed on outer surface of perforated endless conveyor belt (9).
[Claim 8] A method as in claim 6 characterized in that:
said process of gas recirculation comprises the process of torrefaction gas flow manipulation, wherein the temperature of the torrefaction gas is measured after the torrefaction gas is released from biomass (4) dispensed on the receiving surface of perforated endless conveyor belt (9) and before said torrefaction gas enters into the collecting channel (6), hence the state or position of regulation means comprising the flaps, valves, electric drives and prime mover is adapted to the required level and efficiency of biomass torrefaction process.
[Claim 9] A method as in claim 6 characterized in that:
said process of gas recirculation comprises the process of collecting the released torrefaction gas, wherein the lateral flow of torrefaction gas released from the biomass (4) being dispensed on the perforated conveyor belt (9) is limited by plurality of lateral gas baffles (8) which deflects the torrefaction gas flow (22) to the collector channel (6).
[Claim 10] A method as in claim 1 characterized in that:
said method further comprises the process of biomass (4) transportation, wherein at least one perforated endless conveyor belt is used to transfer the biomass (4) through the chamber (10) for biomass torrefaction process utilization.
[Claim 11 ] A method as in claim 11 characterized in that:
said biomass (4) transportation process comprises plurality of endless conveyor belts (9) in serial and/or in parallel connection.
[Claim 12] A method as in claim 1 characterized in that:
said process of adding a biomass (4) to said chamber (10) is utilized by screw conveyor (2), wherein the biomass (4) is substantially dispensed by dispensing device (3) onto the receiving surface of said perforated endless conveyor belt (9).
[Claim 13] A method as in claim 1 characterized in that:
said method further comprises the process of collecting the biomass torrefaction dust, wherein said biomass torrefaction dust is collected in biomass torrefaction dust collector (17).
[Claim 14] A method as in claim 1 characterized in that:
said method further comprises the process of collecting the biomass torrefaction particles, wherein said biomass torrefaction particles are collected in biomass torrefaction particle collector (18).
[Claim 15] A method as in claim 1 characterized in that:
said method further comprises a process of biomass (4) discharge, wherein the torrefied biomass is discharged from chamber (10) by screw conveyor (24), and wherein the biomass (4) is compressed and formed in briquettes or pellets.
[Claim 16] A method as in claim 1 characterized in that:
said method further comprises the process of mechanical cleaning the apertures of perforated endless conveyor belt (10).
[Claim 17] A method as in claim 1 characterized in that:
said torrefaction process is the process of low temperature pyrolysis being utilized between 200°C and 300°C.
[Claim 18] A method as in claim 1 characterized in that:
said torrefaction process is the process of low temperature pyrolysis being utilized in substantially oxygen free environment within the substantially gas-tight chamber (10).
PCT/IB2019/000106 2018-02-27 2019-03-01 Method and apparatus for biomass torrefaction WO2019166873A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI201800046A SI25600A (en) 2018-02-27 2018-02-27 Method and device for torrefaction of biomass
SIP-201800046 2018-02-27

Publications (2)

Publication Number Publication Date
WO2019166873A1 WO2019166873A1 (en) 2019-09-06
WO2019166873A4 true WO2019166873A4 (en) 2019-11-28

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Application Number Title Priority Date Filing Date
PCT/IB2019/000106 WO2019166873A1 (en) 2018-02-27 2019-03-01 Method and apparatus for biomass torrefaction

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WO (1) WO2019166873A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3135937A1 (en) 2019-04-15 2020-10-22 Carbonzero Sagl Continuous reactor device and process for treatment of biomass
WO2022153232A1 (en) * 2021-01-15 2022-07-21 Indian Institute Of Science A system for processing biomass and a method thereof
KR102378265B1 (en) * 2021-08-31 2022-03-25 (주)진에너텍 Heat treatment device for removing bad odor from sewage sludge solid fuel
KR102378261B1 (en) * 2021-08-31 2022-03-25 (주)진에너텍 Heat treatment device for removing bad odor from sewage sludge solid fuel
KR102378273B1 (en) * 2021-08-31 2022-03-25 (주)진에너텍 Manufacturing system for solid fuel having heat treatment device for removing bad odor from sewage sludge solid fuel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379408B (en) * 1983-07-07 1986-01-10 Heid Ag Maschf METHOD FOR THE PRODUCTION OF ORGANIC ROAST COAL AND DEVICE FOR ITS IMPLEMENTATION
US9631156B2 (en) * 2013-12-03 2017-04-25 Clean Electricity Generation Uk Ltd Torrefaction/gassification system

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SI25600A (en) 2019-08-30
WO2019166873A1 (en) 2019-09-06

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