• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a new plant (100) for the gasification of plant material and for the simultaneous production of biochar (b) and is characterized in that - it with a sloping tubular reactor (3) with rotating upwardly increasing pitches (g) having screw conveyor (3a) and reservoir (3d) for the plant material (a) at the lower end (31) is formed, - that at the upper end (32) of the tube reactor (3) brought to a temperature of 350 to 1000 ° C Verkohlungskammer (4 ) by means of screw conveyor (3a) with preheated pyrolysed plant material (a ') to beaufschlagendem, obliquely downwards, provided for a Rundumverbrennungsluftzufuhr, tubular grate (4a) with air supply openings (4b) connects, - that the hot gases formed there (c) together with the pyrolysis gases (c1) formed in the pyrolysis zone (II) via a gas discharge line (3e) opening out of the tube reactor (3) the pyrolysis material (a ') passing through the pyrolysis zone (II), which becomes porous and becoming loose there, can be sucked in in the opposite direction (R2) and fed to further utilization, and - if desired, the generated biochar (b) is conveyed via a discharge lock (5a ) is ausbringbar.
    公开号:AT519471A4
    申请号:T50095/2017
    申请日:2017-02-06
    公开日:2018-07-15
    发明作者:
    申请人:Herz Energietechnik Gmbh；
    IPC主号:
    专利说明:

    Plant material charring and gasification plant
    The present invention relates to a new plant for the gasification of, and if desired for the simultaneous production of biochar, from vegetable material, in particular wood.
    Various biochar plants have already become known which work according to different technologies.
    Thus, such a system of the company. Pyreg GmbH has been described in series with a fuel power of 500 kW, which operates on the Gleichstrom-Verkohlungsprinzip: About a rotary valve, the biomass to be carbonized is introduced without air supply into the reactor in which they to 500 to 600 ° C is heated. The resulting gases are sucked off. Before they are completely burned in a separate combustion chamber at about 1250 ° C, they are cleaned in a cyclone of biochar particles. The transport of the solid biomass takes place by means of a double-shaft screw, which ensures good mixing of the biomass to be charred. During the passage of the twin-screw screw, the biomass is charred to biochar. Before it is discharged, it is quenched with water, which ensures safe transport of the biochar. There are no burdens on the generated biochar by tars or condensates, since the gases and the biochar are not cooled in the reactor, but exit at high temperature from the charring zone.
    The flue gas leaving the combustion chamber is purged in a second cyclone before providing the process heat to the reactor via a jacketed tube. With the emerging from the reactor flue gas can still be a heat exchanger with a thermal power of up to 150 kW are operated before the flue gas is discharged through a chimney.
    The system only requires additional auxiliary power when starting, e.g. by means of natural gas gas burner, in the combustion chamber. In stationary operation, no natural gas is needed and the charring process is autothermal when the biomass to be charred has a calorific value of at least 10 MJ / kg. It can thus produce biochar according to the European Biochar Certificate (EBC) directive.
    Furthermore, the so-called Schottdorf-Meiler of the company Carbon Terra GmbH with a fuel output of 1000 kW has become known. By means of vertical countercurrent charring principle biochar with the quality level "premium" according to EBC guidelines can be produced.
    The employed here is a moving bed reactor in which the fuel input material migrates downwards by the action of gravity and the synthesis gas generated flows countercurrently through the biomass upwards. In this process, higher layers of biomass are dried. This allows it to easily be processed into biochar with a moisture content of up to 40%. Furthermore, the moving bed reactor acts as a dust filter, so that no problems with dust emissions occur.
    The input material is introduced from above into the kiln and then passes through three zones, namely a first drying zone in which the moist biomass is dried by the up to 300 ° C hot, rising gases. • The second zone is the flame zone, where flame temperatures above 1000 ° C occur. • In the third zone, Glimmzone, the temperature is controlled to 500 ° C to 600 ° C by means of a controlled air supply. The discharge of the biochar formed in the Glimmzone by gravity. The biochar thus produced has high porosity and is pressed by means of pressure of the biomass from above through a coarse mesh grid. She also falls into a water bath. A backup fire is required to start up the boiler, but in stationary operation this system also works without external firing.
    Also known is the "compact converter" of the company Biomacon GmbH in several sizes, with 25 to 250 kW power. This technology makes it possible to produce biochar and heat or only heat as needed. In addition, the quality of the biochar produced can be adjusted with the aid of the regulation used there. However, quality is to a large extent influenced by the process management itself.
    The compact converter is a horizontal countercurrent carburization reactor, which is a countercurrent autocatalyst fixed bed gasifier with internal gas circulation. In order to ensure trouble-free charring, lignocellulosic fuels with a maximum water content of 30% must be used.
    The charring process with this compact converter usually takes place in the following four phases: · A heated spiral conveyor transports the lignin-containing fuel from a bunker to the chute of a hot gas reformer. The heating of the spiral conveyor ensures that only enough dry fuel gets into the hot gas reformer. · In the hot gas reformer, the plant material used is exposed to temperatures of 450 to 900 ° C over a long period to ensure its complete charring. The resulting gases are burned in a combustion chamber arranged above and laterally of the hot gas reformer. The combustion chamber is connected to hot gas injectors which are passed through the hot gas reformer, so that the resulting hot exhaust gas is passed around the simmering biomass. · The excess heat liberated in the countercurrent carbonization process is used for heating purposes. · After passing through the hot gas reformer, the generated biochar is discharged via a rotary valve and extinguished with water.
    With the described converter biochar with the quality level "basic" according to EBC guidelines can be produced.
    Finally, wood gas power plants of SynCraft Engineering GmbH are to be mentioned, which are operated with woodchips as fuel and have the primary goal of generating electricity, with biochar being produced as a by-product. The wood gas power plants have a fuel output of 720 kW to 1370 kW. It is basically a stepped DC gasification with a floating bed, which works against gravity, which offers the advantage that the pellets remain always loosened and good gas permeability. On the other hand, there is a disadvantage in the low mass fraction of water of not more than 15%, which the wood chips must have for trouble-free operation.
    This technology is a stepped DC coking principle.
    To be able to produce the by-product product biochar, the following process steps are carried out: • The woodchips are transported by a screw conveyor through a vertical pyrolysis unit. At substoichiometric air supply and temperatures of about 500 ° C, they are converted into the two components synthesis gas and biochar. • The resulting components are transported to a suspended bed gasifier. The biochar is cleaned of impurities before entering the fluidised bed reactor at temperatures around 850 ° C. • It is gasified there until it is carried along by the syngas stream. • The biochar particles entrained in the suspended bed reactor are separated by filters and extinguished with water. At a fuel output of 1000 kW per day, the 3 m3 biochar with the "premium" grade of biochar according to the EBC guidelines is required.
    The graded DC fixed-bed gasifier prevents contamination of the biochar with tars and PAHs, while at the same time sustainably producing electricity with the synthesis gas.
    The present invention has set itself the goal of creating a high-quality and high-purity synthesis gas for a variety of uses and preferably at the same time highest quality biochar plant, simple in its construction and trouble-free functioning system, which is characterized by high efficiency.
    The invention relates to a plant as mentioned above for the gasification of, and if desired for the simultaneous production of biochar, wherein plant material, in particular wood, successively through a drying zone and a pyrolysis zone in a charring zone is feasible, in which by means of substoichiometric combustion of a part the material with supply of primary air at temperatures of up to 1000 ° C, optionally with charring a remaining portion of the material to biochar, and the generated, hot combustion, charring and pyrolysis gases supplied to the plant material, especially for the latter Heating, can be countered, which is characterized in that - the system with an obliquely upwardly tubular reactor with continuously rotating in the same, gradually increasing at least approximately from the central region of the tubular reactor to upward Ga formed at the upper end of the tubular reactor, where the screw conveyor ends, placed in its interior to a temperature of 350 to 1000 ° C charring chamber with by means of screw conveyor with preheated and at least partially-pyrolyzed plant material to beaufschlagendem, obliquely downward, provided for an all-round, all-round combustion or -Primärluftzufuhr to the plant material, tubular grate, preferably with square cross-section, and
    Connecting air supply openings, - that the formed in the Verkohlungskammer, hot combustion and Verkohlungsgase together with the pyrolysis gases formed in the pyrolysis of the tubular reactor via a out of the tube reactor, approximately in the middle region Ausgündende Gasabführleitung by the pyrolysis in the material conveying direction passing, there porous and granular loosely growing, pyrolyzed material, in sucking towards the direction just mentioned opposite direction and can be fed to a respective desired recycling, and - that, if desired, generated in the charring, fine to fine-grained accrued, highly porous biochar can be discharged through an outside air-tight discharge lock.
    With this newly developed, inclined countercurrent charcoal plant, biochar and syngas can be continuously produced, with the amount of biochar production variable and can drop to zero.
    In particular, in the sense of preventing clogging of the upper end of the tube reactor and thus the transition of the vegetable material in the charring zone is provided that the conveyor screw for the vegetable material is mounted only on one side in a arranged at the lower end of the tubular reactor geared motor for their drive, said is preferably provided that the screw conveyor has a reaching only to the central region of the same core.
    This has the advantage that in the pyrolysis area much more space is provided for the pumped plant material, which contributes significantly to the relaxation of the same in this zone.
    As far as the inclination of the tubular reactor is concerned, an angle in the range of 10 to 20 ° with respect to the horizontal has proved favorable.
    With this inclination, on the one hand, an effective delivery of the material and, on the other hand, a sufficiently long residence time thereof in the drying zone and in the pyrolysis zone are achieved, at the same time achieving a favorable, vigorous recirculation and mixing of the material, both mentioned above.
    It has proven to be particularly advantageous if, according to the invention, it is ensured that the entire screw conveyor is formed with a progressively increasing pitch course towards its overhead end, wherein, in particular to avoid blockages in the reactor, the pitch from the lower end of the screw conveyor until is formed to the upper end in a plurality of discontinuous jumps by a total of 10 to 25% increasing. Due to the fact that the pitches of the screw conveyors increase upwards, in addition to the prevention of blockages before entering the charring zone, the loosening of the pyrolyzed material, which at the same time becomes highly porous, is achieved, which finally raises the adsorption capacity of the biochar producible by means of the plant according to the invention.
    In particular, in order to achieve the highest particulate matter, tar and ash-free synthesis gas to be supplied to any desired further use, it is particularly preferred if the gas discharge opening out of the same in the middle region of the tubular reactor with a suction fan for the suction or extraction of the combustion, Charring and pyrolysis gases through which the pyrolysis zone in the conveying direction passing and subjected there pyrolysis, plant material is equipped in the opposite direction to the conveying direction of the plant material.
    In this way, it is ensured that the combustion, charring and pyrolysis gases flowing in the opposite direction to the conveying direction of the vegetable material are continuously freed from the finest particles of dust and ash by means of the plant material which, in particular, passes through the pyrolysis zone of the tubular reactor and acts as a biofilter.
    A not unimportant consequence of the oblique arrangement of the reactor with the screw conveyor is that the hot biochar generated in the charring zone can be transported in the direction of the discharge sluice due to the feeding of the vegetable material by means of the screw conveyor. In the event that no biochar is to be produced, ie that all of the plant material is to be converted into synthesis gas for any required purposes, it has proved to be beneficial to provide for a structure of the new plant, in which within the charring zone Space is arranged on a supplementary grid on which the generated in the charring zone, hot biochar in the case of the exclusive need for the combustion, charring and pyrolysis gases produced are completely burned to the ash content, the ash on the outside air-tight discharge lock can be discharged ,
    Last but not least, it should be mentioned that it is favorable, in particular for the fine graininess of the biochar produced, when the charcoal leaving the charring zone descends downwards and generates hot biochar after passing through an air-tight discharge sluice, in particular for extinguishing it in a container charged with water is executable.
    Reference to the drawing, the invention is explained in more detail:
    The figure shows schematically the new charring and energy gas production plant.
    Key component of the system 100 is a horizontally inclined, ie obliquely rising, tubular reactor 3 arranged therein, by means of drive motor 2 in rotation displaceable screw conveyor 3a, from the lower end 31 of the reactor 3 to the upper end 32, preferably in discrete Steps, ascending snails - g-height g. The lower end 31 of the reactor corresponds to the lower end 31a of the screw conveyor 3, whose upper end 32 corresponds to the upper end 32a thereof.
    In the region of the lower end of the reactor 31, the filling device 3d opens with outside air-tight rotary valve 1 and hopper 3c, through which (n) the vegetable material to be charred, preferably wood chips, can be introduced. This material a is transported by means of the screw conveyor 3 obliquely upward in the conveying direction R1 and passes here first in the drying zone I and then in the pyrolysis zone II, in which both zones drying and then pyrolysis of the plant material a to dry and pyrolysed plant material takes place.
    From the Fig. It is still apparent that the screw conveyor 3 has a core 3b, which extends from the drive 2 approximately to the beginning of the drying zone I approximately in the central region M of the tubular reactor 3. From this center region M of the tubular reactor 3, a gas outlet 3e discharges with a gas suction device, for example fan, 3f.
    At the upper end 32 of the tubular reactor 3 - also close to the outside air - the Verkohlungskammer 4, which includes the charring zone III, wherein the highly promoted, pyrolized plant material a 'continuously in one, for example square cross-section, tubular grate 4a with air inlet openings 4b , through which, all around, so from all sides, intentionally burning, ie primary air is injected in substoichiometric amounts, enters and goes through the same. There takes place under combustion of a portion of the infiltrated into the charring zone III pyrolysed material a 'the charring of the remaining plant material for biochar b, which enters the discharge chamber 5, from where it can be discharged through an air-tight lock 5a, for example in a pool of water ,
    The charring gases c formed in the charring zone III and the pyrolysis gases c1 formed in the pyrolysis zone II are sucked through the exhausting fan 3f in the opposite direction R2 to the plant material conveying direction R1 by the pyrolized plant material a 'continuously supplied by the screw conveyor 3 and filtered by the filtration action thereof Gases entrained finest dust and ash particles freed. These gases c + c1 can be supplied to a wide variety of heating, energy and / or synthesis plants.
    The essential features of the system 100 according to the invention are summarized here: The reactor screw 3a is mounted only on one side in the geared motor 2. The reactor screw 3a is not guided into the charring zone III and has a progressive flight course so that the transport of the material a or a 'up to the grate 4a is designed to be progressively loosening. The reactor screw 3a offers jumps in the space available in the tubular reactor 3, at least from the area of the gas discharge 3e. · The tubular reactor 3 with screw conveyor 3a has an obliquely upwardly inclined angle. This avoids uncontrolled transport of the plant material a or a 'into the charring chamber 4. · From the combination of inclination angle and progressive helical flight, a continuous loosening of the material a or a 'in the countercurrent region of synthesis gas c + c1 and material a or a' is achieved, because on the one hand the material a or a 'trickles back due to gravity, but on the other hand, the progressive helix course counteracts. Here, the pyrolysis zone II and the drying zone I of the countercurrent carburizing plant 100 are located. In the countercurrent region of the tubular reactor 3, the material a 'acts as a biofilter, which constantly renews itself and does not clog the tubular reactor due to the combination of the angle of inclination of the conveying and the progressive flight. Tars and fine particles of ash and dust are filtered out and other emissions are minimized. The formation of the biochar b in the charring chamber 4 takes place shortly before ejection from the system. The charring of the material a or a 'to biochar b takes place exclusively in the charring zone III, within the charring chamber 4. The targeted substoichiometric feeding of the Primary air takes place only in the charring chamber 4. In this case, the primary air is sucked in via a plurality of primary air ducts 4b per side of the grate 4a. The primary air ducts 4b are located in the grate 4a, that is, concretely in the walls surrounding it.
    The transport of the biochar b in the charring chamber 4 in the direction of the ejection cell wheel lock 5a takes place by means of feeding the pyrolysis material a 'by means of the reactor screw 3a and the trickling behavior of the plant material a or a'. The negative pressure required for the " tilted " countercurrent charring process is provided by vacuum generating system component 3f, e.g. Exhaust fan, provided. Depending on the process that has been implemented, this negative pressure component 3f can be installed directly after the gas discharge line 3e or at another position of the respectively following gas-conducting components.
    The biochar b produced by means of the plant 100 according to the invention from the inclined countercurrent charcoaling plant 4 can be used for the following different purposes:
    The biochar b produced can be used in agriculture as a feed additive, as a silage aid, as bedding and / or for manure treatment. The agricultural application of biochar b to fields saves climate-damaging C02 in the soil, thereby significantly improving the climate balance. The biochar b produced can also be used as a compost additive in compost production, as a sorbent in sewage and filter plants, as bedding in dry or separation toilets and as a substitute for fossil fuels. The biochar b can be used as a reducing agent in metallurgy, for the filtration of gases and liquids and for the recovery of dyes, for example by adsorption.
    The synthesis gas c or c + c1 which can be produced in the plant 100 according to the invention can also be used to operate the following processes:
    The generated synthesis gas c or c + c1 is deliberately completely burned in a downstream combustion chamber to flue gas, the hot gas thus produced is used directly or indirectly for drying purposes, or it is selectively burned in a downstream combustion chamber targeted completely to flue gas and then removes a heat exchanger the same heat for the provision of heat in a heating system.
    Furthermore, the following possibilities are mentioned:
    An ORC plant uses the heat potential in the hot gas c + c1 generated by the new plant 100 for power generation.
    An ORC system uses the heat potential from the aforementioned heat exchanger for power generation.
    The generated syngas c + c1 is fed directly into a gas engine for power generation. The waste heat of the gas engine can ultimately be used as well.
    权利要求:
    Claims (9)
    [1]
    claims:
    1. plant (100) for the gasification of, and if desired for the simultaneous production of biochar (b), wherein plant material (a), in particular wood, successively through a drying zone (I) and a pyrolysis zone (II) in a charring zone ( III) is feasible, in which by means of substoichiometric combustion of a portion of the material (a) with supply of primary air at temperatures of up to 1000 ° C, optionally with charring a remaining part of the material (a) to biochar (b), takes place, and hot combustion, charring and pyrolysis gases (c) generated in this process can be fed to the supplied plant material (a), in particular for its predrying and preheating, characterized in that - the plant (100) is inclined obliquely upwards, tubular tube reactor (3) with in the same continuously rotating, at least approximately from the central region (M) of the tubular reactor (3) upwards pr ogressively rising pitch (g) having screw conveyor (3a) with reservoir (3d) for the vegetable material (a) and outside air-tight entry lock (1) at its lower end (31) is formed, - that at the upper end (32) of the Pipe reactor (3), where the screw conveyor (3a) ends, a in their interior to a temperature of 350 to 1000 ° C brought Verkohlungskammer (4) by means of the screw conveyor (3a) with preheated, dried and at least partially-pyrolyzed plant material ( a1) to beaufschlagendem, obliquely downward, provided for an all-round, all-round combustion or -Primärluftzufuhr to the plant material (a1), tubular grate (4a), preferably with square cross-section, with air supply openings (4b) connects, - that in the charring chamber (4) formed, hot combustion and Verkohlungsgase (c) together with the pyrolysis gases (c1) formed in the pyrolysis zone (II) of the tubular reactor (3) via one of the Tubular reactor (3), approximately in the middle region (M) opening out Gasabführleitung (3e) by the pyrolysis zone (II) in the material conveying direction (R1) passing, there porous and granular loosening, pyrolized material (a '), in to just mentioned conveying direction (R1) in the opposite direction (R2) through which they can be sucked in and fed to a respectively desired further utilization, and - if desired, the highly porous biochar (b) generated in the charring chamber (4) through a fine-grained discharge sluice (5a ) is ausbringbar.
    [2]
    2. Plant according to claim 1, characterized in that the conveyor screw (3a) for the plant material (a, a ') only one side in a at the lower end (31) of the tubular reactor (3) arranged geared motor (2) for their drive stored is, wherein it is preferably provided that the screw conveyor (3a) has a reaching only to the central region (M) of the same core (3b).
    [3]
    3. Plant according to claim 1 or 2, characterized in that the tubular reactor (3) is arranged at an angle of 10 to 20 ° C with respect to the horizontal rising obliquely.
    [4]
    4. Plant according to one of claims 1 to 3, characterized in that the entire screw conveyor (3a) is formed with a progressively increasing pitch course to its overhead end (32a) out, wherein, in particular to avoid blockages in the tubular reactor (3) in that the pitch (g) is formed from the lower end (31a) of the screw conveyor (3a) up to its upper end (32a) in a plurality of discontinuous jumps by a total of 10 to 25% rising.
    [5]
    5. Plant according to one of claims 1 to 4, characterized in that in the central region (M) of the tubular reactor (3) from the same ausmündende gas discharge (3e) by means of negative pressure for the suction and extraction of the combustion, charring and pyrolysis gases (c, c1) through which the pyrolysis zone (II) in the conveying direction (R1) passing and there subjected to pyrolysis, plant material (a ') is equipped in the opposite direction (R2) to the conveying direction (R1).
    [6]
    6. Plant according to claim 5, characterized in that in the opposite direction (R2) to the conveying direction (R1) of the vegetable material (a ') flowing or guided combustion, charring and pyrolysis gases (c, c1) by means of, in particular the Pyrolysis zone (II) of the tubular reactor (3) passing, acting as a biofilter plant material (a ') are continuously liberated from the finest dust and ash particles.
    [7]
    7. Plant according to one of claims 1 to 6, characterized in that in the charring zone (III) generated, hot biochar (b) due to the Nachschiebens the pyrolysed, plant material (a ') by means of the screw conveyor (3a) in the direction (R1) can be transported to the discharge lock (5a).
    [8]
    8. Installation according to one of claims 1 to 7, characterized in that within the charring zone (III) having space a supplementary grid is arranged, on which generated in the same, hot biochar (b) in the case of exclusive need for the generated combustion - Charcoal and pyrolysis gases (c, c1) are completely burned to the ash content, the ash over the outside air-tight discharge lock (5a) can be discharged.
    [9]
    9. Plant according to one of claims 1 to 7, characterized in that the charring zone (III) downwards, there generated, hot biochar (b) after passing through an outside air-tight discharge lock (5a), in particular for their deletion in a water-charged container can be discharged.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3358253A1|2018-08-08|
    AT519471B1|2018-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2537912A1|2011-06-20|2012-12-26|Daniele Della Toffola|Apparatus and method for the continuous-cycle thermo-chemical decomposition of a biomass|
    WO2013003960A1|2011-07-07|2013-01-10|Sustainable Ventures Inc.|System and process for conversion of organic matter into torrefied product|
    WO2014164545A1|2013-03-12|2014-10-09|Cool Planet Energy Systems, Inc.|Staged biomass fractionator|
    US9005402B2|2011-05-14|2015-04-14|Interra Energy, Inc.|Reciprocating reactor and methods for thermal decomposition of carbonaceous feedstock|
    EP2787280B1|2013-04-05|2020-03-18|Schmid AG - Energy Solutions|Device for the combustion of free-flowing solid fuel|
    CA2821474C|2013-07-19|2018-05-01|ABRI-Tech Inc.|Compact fast pyrolysis system for conversion of carbonacous materials to liquid, solid and gas|
    DE102014003806A1|2014-03-15|2015-09-17|ingitec Engineering GmbH|Plant and method for direct pyrolysis of biomass|DE102019117900A1|2019-07-03|2021-01-07|Christian Engelhardt|Device for the production of biochar and / or for heat generation|
    RU2724741C1|2020-02-25|2020-06-25|Юрий Алексеевич Кобаков|Waste processing plant|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50095/2017A|AT519471B1|2017-02-06|2017-02-06|Verkohlungsanlage|ATA50095/2017A| AT519471B1|2017-02-06|2017-02-06|Verkohlungsanlage|
    EP18154896.7A| EP3358253A1|2017-02-06|2018-02-02|Carbonization installation|
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