EP2686408A1 - Method and system for the production of carbon monoxide - Google Patents

Method and system for the production of carbon monoxide

Info

Publication number
EP2686408A1
EP2686408A1 EP12758071.0A EP12758071A EP2686408A1 EP 2686408 A1 EP2686408 A1 EP 2686408A1 EP 12758071 A EP12758071 A EP 12758071A EP 2686408 A1 EP2686408 A1 EP 2686408A1
Authority
EP
European Patent Office
Prior art keywords
fuel
gas
conveyed
flow
characteri zed
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Withdrawn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
EP12758071.0A
Other languages
German (de)
French (fr)
Other versions
EP2686408A4 (en
Inventor
Teuvo Kurvinen
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.)
AP Industry Engineering Service Oy
Original Assignee
AP Industry Engineering Service 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 AP Industry Engineering Service Oy filed Critical AP Industry Engineering Service Oy
Publication of EP2686408A1 publication Critical patent/EP2686408A1/en
Publication of EP2686408A4 publication Critical patent/EP2686408A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/40—Carbon monoxide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/22—Arrangements or dispositions of valves or flues
    • C10J3/24—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed
    • C10J3/26—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed downwardly
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/34—Grates; Mechanical ash-removing devices
    • C10J3/36—Fixed grates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
    • C10K1/046—Reducing the tar content
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
    • C10K1/30—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses with moving purifying masses
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0903—Feed preparation
    • C10J2300/0909—Drying
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0916—Biomass
    • C10J2300/092—Wood, cellulose
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
    • C10J2300/1643—Conversion of synthesis gas to energy
    • C10J2300/165—Conversion of synthesis gas to energy integrated with a gas turbine or gas motor
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1846—Partial oxidation, i.e. injection of air or oxygen only
    • 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

Definitions

  • the invention relates to a method as defined in the preamble of claim 1 and to a system as defined in the preamble of claim 8 for the production of carbon monoxide (CO) .
  • Carbon monoxide CO is an odorless, colorless, toxic, reactive and highly flammable gas. It is used as a fuel, to reduce metals from the respective oxides in metallurgy and as a raw material in chemical industry. Carbon monoxide can be manufactured in many different ways. Traditionally, it is obtained by incompletely burning carbon or a carbon-containing substance, i.e. with an insufficient quantity of oxygen. The invention specifically relates to this type of manufacturing of carbon monoxide.
  • the publication discloses a heat production unit employing a solid fuel, such as wood chips.
  • the top part of this combustion and gasification device is provided with a combustion chamber for burning the fuel, and the bottom part is provided with a gasification unit for gasifying the fuel.
  • the fuel is conveyed to a distribution orifice, from which it flows to a gas generator, wherein the fuel is gasified to carbon monoxide and applicable for example for the production of electricity.
  • the dried fuel released from the gas, i.e. practically carbon rises up to a grate disposed in the combustion chamber, wherein the fuel is burnt and the heat can be recovered for a suitable applica ⁇ tion .
  • the process may naturally be effected as two different processes as well, i.e. to provide the gasification separately, in which case it yields both carbon monoxide and carbon which are then utilized separately.
  • the combination process as described above provides ad- vantages as the heats being generated can be better utilized in different process ' steps.
  • the objective of the invention is to remedy the defects of the prior art as referred to above.
  • the objective of the invention is to provide a process for the production of carbon monoxide yielding pure gas which is directly suitable for example for combustion engines.
  • the objective of the invention is a process wherein separate CO filters that need be replaced are not required.
  • the invention relates to a method for the production of carbon monoxide (CO) from a solid fine-grained organic fuel, in which method the fuel is conveyed to a gas generator, wherein the fuel is heated for forming CO, after which the CO is filtered from the impurities before use.
  • the heating of the fuel is effected by burning it incompletely in the gas generator, i.e. by feeding only a small quantity of oxygen to the gas generator for providing reduced combustion and generation of gas. This way, the fuel itself pro- Jerusalem the heat required for the gasification.
  • filtering of the obtained CO gas is performed by conveying it through the fine-grained fuel being used so that the impurities to be filtered are left in the fuel.
  • the hot impure CO gas is blown to the inflowing fuel, whereupon the hot gas heats and dries the grainy fuel, while the grainy fuel works as a filter and purifies the gas flowing through the fuel.
  • the tar and similar impurities condense from the gas onto the surface of the fuel.
  • CO is preferably conveyed through a moving flow of fuel.
  • filtration is suitably effected right before conveying the fuel to the gasification and combustion process.
  • its drying and preheating provide the best benefit.
  • CO is conveyed in a counterflow direction relative to the direction of movement of the fuel being conveyed to the gas generator.
  • a tubular screw conveyor which can be made sufficiently leak-proof and provided full of the fuel in such a way that the gas being purified is forced to flow through the grainy fuel.
  • Such a process wherein explosive gas is being treated must be kept gas-tight.
  • the fuel is fed to the process through a suitable rotary feeder known per se. Further, CO is sucked from the gas generator and blown to the fuel flow. Likewise, the CO having been purified in the fuel flow is sucked out of the fuel and conveyed for use.
  • solid finegrained organic fuel is used as the fuel.
  • the degree of purity of CO being obtained from the process can be adjusted by changing the length of the flow through which the gas travels in the fuel.
  • the degree of filtration can also be adjusted by changing the grain size of the fuel being used. If the fuel is chipped smaller, even close to dust, the gas being pu- rified has a longer way to travel and more purifying contact surface with the fuel than with a large- grained fuel.
  • the invention also relates to a system for the produc- tion of carbon monoxide CO from a solid fine-grained organic fuel, the system including a gasification unit for gasifying the fuel and producing CO, a fuel conveyor for transferring the fuel to the gasification unit, as well as gas recovery means for recovering the CO.
  • the gas recovery means include a gas circulation for circulating and filtering the CO gas in the fuel being conveyed to the gasification unit.
  • the gas circulation is provided in the fuel conveyor.
  • the gas circulation in the fuel conveyor such as a screw conveyor, is flowing in the opposite direction relative to the direction of movement of the fuel.
  • the closed gas circulation requires that the gas circulation include a suction for sucking CO from the gasification unit, a blast for blowing the CO to flow through the fuel, as well as a second suction for sucking the filtered CO from the fuel.
  • the gas circulation ' preferably includes a spark arrestor before conveying the CO to the fuel, which prevents the access of sparks with the CO flow from the gas generator to the fuel as it is being transferred.
  • the method and the system according to the invention are particularly suitable for a process producing a combination of heat and electricity, wherein pure CO gas is obtained by gasification from a grainy fuel for use in a combustion engine to rotate the generator. At the same time, by partially burning the fuel and by burning the carbon obtained from the fuel, heat is obtained for any required heating applications. Further, the heating value of the fuel being used is high because the tar and other impurities of the gas separat- ed in connection with the gasification have been filtered to the fuel.
  • the method and the . system according to the invention provide considerable advantages as compared to the prior art.
  • the invention allows small and efficient energy production units which may be regional or local and independent of other energy production and distribution.
  • the invention allows an economically viable and effective combined production of electricity and heat from almost any organic solid fuel.
  • most of the energy by-products generated in agriculture, forestry and construction, which used to be called waste, can be effectively utilized by means of the invention.
  • the figure illustrates one system according to the invention for effectively and economically utilizing solid biofuel provided in a grainy form.
  • the system includes a transfer conveyor 9, by which the fuel be- ing treated is lifted onto a rotary feeder 10.
  • the fuel is fed to a fuel silo 11 disposed below the rotary feeder, the bottom part of the fuel silo having the helical conveyor screw of a fuel conveyor 2.
  • the conveyor screw is rotated by an engine 12.
  • the fuel conveyor 2 the grainy fuel, such as wood chips, is transferred to a gas generator 1 which has a flow path 13 opening upwards from the fuel conveyor, along which flow path the fuel rises and is distribut- ed onto an annular grate 14 of the gas generator around the - flow path.
  • the fuel is partially burnt by means of the combustion air limitedly fed therein via nozzles 15.
  • the heat being thus generated makes the fuel gasify, in which case, depending on the settings, any ungasifiable fuel and carbon having been formed are conveyed upwards to a combustion chamber 16 and to an annular grate 17 around the combustion chamber, wherein the fuel is burnt and the heat obtained is recovered as known per se for a suitable applica- tion.
  • the hot gas being generated in the area of the annular grate 14 of the gas generator being mostly carbon monoxide CO, is utilized by gas recovery means 3.
  • the CO gas could be conveyed directly for use because it is highly flammable and thus burns easily.
  • it contains a great deal of tar and other impurities to such extent that it could not be used directly in any type of combustion engine before being filtered.
  • the recovery means include a gas circulation 4 which has, in the gas generator 1, a suction 5, by means of which the hot gas is conveyed along a duct 18 to a spark arrestor 8, wherein any sparks are removed from the gas flow before conveying the gas to the fuel flow, thereby preventing earl'y ignition of the fuel.
  • the gas is conveyed along a duct 19, i.e. blown 6, to the fuel flow passing in the interior of the fuel conveyor 2. Blowing the CO gas to the fuel takes place at a distance from the gas generator 1 and likewise at a distance from the fuel silo 11, while a second suction 7 is provided in proximity to the fuel silo.
  • the impure CO gas blown to the fuel in the fuel conveyor 2 thus flows in the fuel toward the fuel silo 11 against the direction of movement of the fuel, escaping from the fuel to an exhaust duct 20 by the second suction 7.
  • the hot CO gas blown to the fuel containing tar and other impurities, cools in the grainy fuel, heating and drying the fuel.
  • the cooling and condensing impurities of the gas adhere onto the surfaces of the fuel grains.
  • the CO gas having entered the second suction 7 through the fuel is almost pure absolute carbon monoxide, the use of which for example in a combustion engine is trouble-free.
  • the system as coupled to a combustion engine and a generator can effectively produce both electricity and heat.
  • the degree of purity of the CO gas can easily be adjusted firstly by adjusting the flow rate of the gas and/or the flow rate of the fuel, i.e. by adjusting their flow relative to each other.
  • the filtration re- suit can also be influenced by changing the length of the flow path, i.e. by changing the distance between the blast 6 and the suction 7.
  • the fil ⁇ tration result can be adjusted by changing the structure of the fuel being used, i.e. the filtration prop ⁇ erties of the fuel. This is effected by changing the grain size of the fuel, i.e. when better filtration is desired, the grain size of the fuel would be reduced.
  • One means for continuous adjustment of the filtration properties is continuously to use two fuels having different grain sizes, e.g.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Industrial Gases (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention relates to a method and to a system for the production of carbon monoxide (CO) from a solid fine-grained organic fuel. In the method, the fuel is conveyed to a gas generator (1) wherein the fuel is heated for forming CO, after which the CO is filtered from the impurities before use. According to the invention, the filtering is effected by conveying the CO through the fine-grained fuel being used so that the impurities to be filtered are left in the fuel.

Description

METHOD AND SYSTEM FOR THE PRODUCTION OF CARBON MONOXIDE
FIELD OF THE INVENTION
The invention relates to a method as defined in the preamble of claim 1 and to a system as defined in the preamble of claim 8 for the production of carbon monoxide (CO) . BACKGROUND OF THE INVENTION
Carbon monoxide CO is an odorless, colorless, toxic, reactive and highly flammable gas. It is used as a fuel, to reduce metals from the respective oxides in metallurgy and as a raw material in chemical industry. Carbon monoxide can be manufactured in many different ways. Traditionally, it is obtained by incompletely burning carbon or a carbon-containing substance, i.e. with an insufficient quantity of oxygen. The invention specifically relates to this type of manufacturing of carbon monoxide.
Prior art in the field of the invention has been disclosed for example in Finnish patent FI114875. The publication discloses a heat production unit employing a solid fuel, such as wood chips. The top part of this combustion and gasification device is provided with a combustion chamber for burning the fuel, and the bottom part is provided with a gasification unit for gasifying the fuel. In the device, the fuel is conveyed to a distribution orifice, from which it flows to a gas generator, wherein the fuel is gasified to carbon monoxide and applicable for example for the production of electricity. The dried fuel released from the gas, i.e. practically carbon, rises up to a grate disposed in the combustion chamber, wherein the fuel is burnt and the heat can be recovered for a suitable applica¬ tion .
In the recovery of carbon monoxide, the process may naturally be effected as two different processes as well, i.e. to provide the gasification separately, in which case it yields both carbon monoxide and carbon which are then utilized separately. However, the combination process as described above provides ad- vantages as the heats being generated can be better utilized in different process' steps.
The problem in the prior art is the treatment of CO into a useful pure product. In the gasification, the fuel releases tar and turpentine which are to be removed from the gas by different separate filters. However, the use, cleaning and replacement of the filters is difficult and expensive and always causes interruptions of maintenance in the process.
OBJECTIVE OF THE INVENTION
The objective of the invention is to remedy the defects of the prior art as referred to above. In particular, the objective of the invention is to provide a process for the production of carbon monoxide yielding pure gas which is directly suitable for example for combustion engines. Further, the objective of the invention is a process wherein separate CO filters that need be replaced are not required. In addition, it is an objective of the invention to disclose a continuous and uninterrupted gas manufacturing process wherein the filtered impurities can be utilized, i.e. burnt, right away to produce heat.
SUMMARY OF THE INVENTION As for the features which are characteristic of the method and the system according to the invention, reference is made to the claims. The invention relates to a method for the production of carbon monoxide (CO) from a solid fine-grained organic fuel, in which method the fuel is conveyed to a gas generator, wherein the fuel is heated for forming CO, after which the CO is filtered from the impurities before use. Preferably, the heating of the fuel is effected by burning it incompletely in the gas generator, i.e. by feeding only a small quantity of oxygen to the gas generator for providing reduced combustion and generation of gas. This way, the fuel itself pro- duces the heat required for the gasification. According to the invention, filtering of the obtained CO gas is performed by conveying it through the fine-grained fuel being used so that the impurities to be filtered are left in the fuel. Thus, in the invention the hot impure CO gas is blown to the inflowing fuel, whereupon the hot gas heats and dries the grainy fuel, while the grainy fuel works as a filter and purifies the gas flowing through the fuel. In other words, as the gas flowing in the fuel cools, the tar and similar impurities condense from the gas onto the surface of the fuel.
It is naturally possible that the filtering take place in the fuel silo, i.e. when the fuel is not moving, but CO is preferably conveyed through a moving flow of fuel. In other words, filtration is suitably effected right before conveying the fuel to the gasification and combustion process. Thus, its drying and preheating provide the best benefit. In a preferred embodiment of the invention, CO is conveyed in a counterflow direction relative to the direction of movement of the fuel being conveyed to the gas generator. In this case, it is possible to use for example a tubular screw conveyor which can be made sufficiently leak-proof and provided full of the fuel in such a way that the gas being purified is forced to flow through the grainy fuel. Such a process wherein explosive gas is being treated must be kept gas-tight. To this end, the fuel is fed to the process through a suitable rotary feeder known per se. Further, CO is sucked from the gas generator and blown to the fuel flow. Likewise, the CO having been purified in the fuel flow is sucked out of the fuel and conveyed for use.
In the method according to the invention, solid finegrained organic fuel is used as the fuel. This means mostly wood chips having a suitable grain size obtainable from logging waste, brushwood, stumps, sawn surfaces, thinning, construction waste etc.
The degree of purity of CO being obtained from the process can be adjusted by changing the length of the flow through which the gas travels in the fuel. The degree of filtration can also be adjusted by changing the grain size of the fuel being used. If the fuel is chipped smaller, even close to dust, the gas being pu- rified has a longer way to travel and more purifying contact surface with the fuel than with a large- grained fuel.
The invention also relates to a system for the produc- tion of carbon monoxide CO from a solid fine-grained organic fuel, the system including a gasification unit for gasifying the fuel and producing CO, a fuel conveyor for transferring the fuel to the gasification unit, as well as gas recovery means for recovering the CO. According to the invention, the gas recovery means include a gas circulation for circulating and filtering the CO gas in the fuel being conveyed to the gasification unit.
In a preferred embodiment of the invention, the gas circulation is provided in the fuel conveyor. Most suitably, the gas circulation in the fuel conveyor, such as a screw conveyor, is flowing in the opposite direction relative to the direction of movement of the fuel. Thus, as hot gasified CO flows with the fuel grains, the CO is cooled, and the impurities it contains, such as the tar and turpentine, are condensed on and adhered to the fuel grains. At the same time, the fuel is heated and dried before gasification and combustion .
The closed gas circulation requires that the gas circulation include a suction for sucking CO from the gasification unit, a blast for blowing the CO to flow through the fuel, as well as a second suction for sucking the filtered CO from the fuel. Further, the gas circulation' preferably includes a spark arrestor before conveying the CO to the fuel, which prevents the access of sparks with the CO flow from the gas generator to the fuel as it is being transferred.
The method and the system according to the invention are particularly suitable for a process producing a combination of heat and electricity, wherein pure CO gas is obtained by gasification from a grainy fuel for use in a combustion engine to rotate the generator. At the same time, by partially burning the fuel and by burning the carbon obtained from the fuel, heat is obtained for any required heating applications. Further, the heating value of the fuel being used is high because the tar and other impurities of the gas separat- ed in connection with the gasification have been filtered to the fuel.
The method and the . system according to the invention provide considerable advantages as compared to the prior art. The invention allows small and efficient energy production units which may be regional or local and independent of other energy production and distribution. The invention allows an economically viable and effective combined production of electricity and heat from almost any organic solid fuel. Thus, most of the energy by-products generated in agriculture, forestry and construction, which used to be called waste, can be effectively utilized by means of the invention. LIST OF FIGURES
Below, the invention is described in detail with reference to the accompanying drawing which schematically illustrates one system according to the invention. DETAILED DESCRIPTION OF THE INVENTION
The figure illustrates one system according to the invention for effectively and economically utilizing solid biofuel provided in a grainy form. The system includes a transfer conveyor 9, by which the fuel be- ing treated is lifted onto a rotary feeder 10. By the rotary ' feeder 10, the fuel is fed to a fuel silo 11 disposed below the rotary feeder, the bottom part of the fuel silo having the helical conveyor screw of a fuel conveyor 2. The conveyor screw is rotated by an engine 12. By the fuel conveyor 2, the grainy fuel, such as wood chips, is transferred to a gas generator 1 which has a flow path 13 opening upwards from the fuel conveyor, along which flow path the fuel rises and is distribut- ed onto an annular grate 14 of the gas generator around the - flow path. Here, the fuel is partially burnt by means of the combustion air limitedly fed therein via nozzles 15. The heat being thus generated makes the fuel gasify, in which case, depending on the settings, any ungasifiable fuel and carbon having been formed are conveyed upwards to a combustion chamber 16 and to an annular grate 17 around the combustion chamber, wherein the fuel is burnt and the heat obtained is recovered as known per se for a suitable applica- tion.
The hot gas being generated in the area of the annular grate 14 of the gas generator, being mostly carbon monoxide CO, is utilized by gas recovery means 3. In principle, the CO gas could be conveyed directly for use because it is highly flammable and thus burns easily. However, it contains a great deal of tar and other impurities to such extent that it could not be used directly in any type of combustion engine before being filtered.
The recovery means include a gas circulation 4 which has, in the gas generator 1, a suction 5, by means of which the hot gas is conveyed along a duct 18 to a spark arrestor 8, wherein any sparks are removed from the gas flow before conveying the gas to the fuel flow, thereby preventing earl'y ignition of the fuel. After the spark arrestor 8, the gas is conveyed along a duct 19, i.e. blown 6, to the fuel flow passing in the interior of the fuel conveyor 2. Blowing the CO gas to the fuel takes place at a distance from the gas generator 1 and likewise at a distance from the fuel silo 11, while a second suction 7 is provided in proximity to the fuel silo. The impure CO gas blown to the fuel in the fuel conveyor 2 thus flows in the fuel toward the fuel silo 11 against the direction of movement of the fuel, escaping from the fuel to an exhaust duct 20 by the second suction 7. The hot CO gas blown to the fuel, containing tar and other impurities, cools in the grainy fuel, heating and drying the fuel. By virtue of the large contact surface* area between the fuel and the gas, the cooling and condensing impurities of the gas adhere onto the surfaces of the fuel grains. Thus, the CO gas having entered the second suction 7 through the fuel is almost pure absolute carbon monoxide, the use of which for example in a combustion engine is trouble-free. Thus, the system as coupled to a combustion engine and a generator can effectively produce both electricity and heat.
The advantage over the traditional separate filter solutions is that the burning impurities being separated in connection with the gasification from the fuel are not lost; instead, they return .to the fuel circulation in connection with the filtration of the gas and are finally burnt in the combustion chamber, thereby allowing utilization of the thermal energy they contain.
The degree of purity of the CO gas can easily be adjusted firstly by adjusting the flow rate of the gas and/or the flow rate of the fuel, i.e. by adjusting their flow relative to each other. The filtration re- suit can also be influenced by changing the length of the flow path, i.e. by changing the distance between the blast 6 and the suction 7. Most simply, the fil¬ tration result can be adjusted by changing the structure of the fuel being used, i.e. the filtration prop¬ erties of the fuel. This is effected by changing the grain size of the fuel, i.e. when better filtration is desired, the grain size of the fuel would be reduced. One means for continuous adjustment of the filtration properties is continuously to use two fuels having different grain sizes, e.g. large-grained chips and small-grained chips or chips and dust, whereupon, by adjusting their relative feed rates to the process, a quick effect is provided on the filtration properties of the fuel conveyor 2. The invention is not limited merely to the examples referred to above; instead, many variations are possible within the scope of the inventive idea defined by the claims.

Claims

1. A method for the production of carbon monoxide (CO) from a solid fine-grained organic fuel, in which meth- od the fuel is conveyed to a gas generator (1) wherein the fuel is heated for forming CO, after which the CO is filtered from the impurities before use, characteri zed in that the filtering is effected by conveying the CO through the fine-grained fuel being used so that the impurities to be filtered are left in the fuel .
2. The method according to claim 1, characteri zed in that the CO is conveyed through a moving flow of the fuel.
3. The method according to claim 1 or 2, characteri zed in that the CO is conveyed in a counter- flow direction relative to the direction of movement of the fuel being conveyed to the gas generator (1) .
4. The method according to any one of claims 1 to 3, characteri zed in that the CO is sucked from the gas generator (1) and blown to the fuel flow.
5. The method according to any one of claims 1 to 4, characteri zed in that the CO having been purified in the fuel flow is sucked out from the fuel and conveyed for use.
6. The method according to any one of claims 1 to 5, characteri zed in that chips, preferably wood chips, are used as the fuel.
7. The method according to any one of claims 1 to 6, characteri zed in that the degree of purity of the CO being obtained is adjusted by adjusting the grain size of the fuel and/or the length of flow of the CO in the fuel.
8. A system for the production of carbon monoxide (CO) from a solid fine-grained organic fuel, the system including a gasification unit (1) for gasifying the fuel and producing CO, a fuel conveyor (2) for transferring the fuel to the gasification unit, as well as gas re- covery means (3) for recovering the CO, cha r a c t e r i z e d in that the gas recovery means (3) include a gas circulation (4) for circulating and filtering the CO gas in the fuel being conveyed to the gasification unit.
9. The system according to claim 8, cha r a ct e r i z e d in that the gas circulation (4) is provided in the fuel conveyor (2) .
10. The system according to claim 8 or 9, char a c t e r i z ed in that the gas circulation (4) flows in the opposite direction relative to the direction of movement of the fuel.
11. The system according to any one of claims 8 to 10, cha r ac t e r i z ed in that the gas circulation (4) includes a suction (5) for sucking CO from the gasification unit (1), a blast (6) for blowing the CO to the fuel, as well as a second suction (7) for sucking the filtered CO from the fuel.
12. The system according to any one of claims 8 to 11, cha r ac t e r i z e d in that the gas circulation (4) includes a spark arrestor (8) before conveying the CO to the fuel.
EP12758071.0A 2011-03-14 2012-03-14 Method and system for the production of carbon monoxide Withdrawn EP2686408A4 (en)

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FI20115254A FI20115254A0 (en) 2011-03-14 2011-03-14 METHOD AND SYSTEM FOR THE PRODUCTION OF CARBON MONOXIDE
PCT/FI2012/050240 WO2012123638A1 (en) 2011-03-14 2012-03-14 Method and system for the production of carbon monoxide

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7040A (en) * 1850-01-22 hunter
EP1323810A1 (en) * 2001-12-12 2003-07-02 von Görtz & Finger Techn. Entwicklungs Ges.m.b.H. Tube-in-tube gasifier
EP2045311A1 (en) * 2007-10-02 2009-04-08 IN.SER. S.p.A. System and process for the pyrolsation and gasification of organic substances
DE102008021966A1 (en) * 2008-05-02 2009-11-12 Hofmann, Kurt W., Dipl.-Ing. (FH) Fixed-bed gasification reactor, to produce pyrolysis gas from a biomass, has a vertical screw to distribute and mix the biomass material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA827775B (en) * 1981-11-02 1983-08-31 Allis Chalmers Rotary kiln coal gasifier with tar injection to suppress dust entrainment in gas
JP4101699B2 (en) * 2003-05-26 2008-06-18 三菱重工業株式会社 Biomass gasification system and biomass gasification method
CN101967407B (en) * 2010-11-11 2013-08-14 常州大学 Separation method and device for removing tar from biomass gasification combustible gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7040A (en) * 1850-01-22 hunter
EP1323810A1 (en) * 2001-12-12 2003-07-02 von Görtz & Finger Techn. Entwicklungs Ges.m.b.H. Tube-in-tube gasifier
EP2045311A1 (en) * 2007-10-02 2009-04-08 IN.SER. S.p.A. System and process for the pyrolsation and gasification of organic substances
DE102008021966A1 (en) * 2008-05-02 2009-11-12 Hofmann, Kurt W., Dipl.-Ing. (FH) Fixed-bed gasification reactor, to produce pyrolysis gas from a biomass, has a vertical screw to distribute and mix the biomass material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012123638A1 *

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