WO2012136344A1 - Élément convoyeur pour le transport d'un produit et procédé de réalisation d'un processus pyrolytique à l'aide d'un tel élément convoyeur - Google Patents

Élément convoyeur pour le transport d'un produit et procédé de réalisation d'un processus pyrolytique à l'aide d'un tel élément convoyeur Download PDF

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Publication number
WO2012136344A1
WO2012136344A1 PCT/EP2012/001458 EP2012001458W WO2012136344A1 WO 2012136344 A1 WO2012136344 A1 WO 2012136344A1 EP 2012001458 W EP2012001458 W EP 2012001458W WO 2012136344 A1 WO2012136344 A1 WO 2012136344A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
conveying element
conveying
housing
region
Prior art date
Application number
PCT/EP2012/001458
Other languages
German (de)
English (en)
Inventor
Gerd WARCHOL
Lutz Kebelmann
Original Assignee
Olabil Vermögensverwaltungsgesellschaft Mbh
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 Olabil Vermögensverwaltungsgesellschaft Mbh filed Critical Olabil Vermögensverwaltungsgesellschaft Mbh
Publication of WO2012136344A1 publication Critical patent/WO2012136344A1/fr

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Classifications

    • 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
    • C10B7/00—Coke ovens with mechanical conveying means for the raw material inside the oven
    • C10B7/10—Coke ovens with mechanical conveying means for the raw material inside the oven with conveyor-screws
    • 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
    • C10B31/00—Charging devices
    • C10B31/06—Charging devices for charging horizontally
    • 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
    • C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C10B47/28—Other processes
    • C10B47/32—Other processes in ovens with mechanical conveying means
    • C10B47/44—Other processes in ovens with mechanical conveying means with conveyor-screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/26—Screws
    • B65G33/265—Screws with a continuous helical surface

Definitions

  • Conveying element for conveying a material and method for performing a pyrolytic process using such
  • the invention relates to a conveying element for conveying a good from an entry point to an issuing point, wherein the good at the entry point can be supplied largely depressurized, the good at the exit point can be kept below a predetermined pressure
  • the conveying element is a housing and at least one has in this by a drive about an axis rotatably arranged screw and wherein the screw has at least one catchment area, at least one adjoining in the direction of the axis compressor area and at least one adjoining in the direction of the axis sealing area.
  • the invention relates to a method for carrying out a pyrolytic process using such a conveying element.
  • Another conveying element is the so-called.
  • Rotary valve in which radially arranged cells take over the media transport.
  • Another concept is based on a hydraulically driven injection method in which hydraulically driven devices compress bulk-like masses and then metered into a high-pressure gasifier.
  • the disadvantage here however, the discontinuous operation in the processing of the masses.
  • the invention is based on the invention, a training element of the type mentioned in such a way that it is possible to easily promote toxic or emissions moderately problematic Good and put under a high pressure, without causing problems with the contamination of the environment.
  • Next is to be achieved that an interruption of the substance transport, d. H. the transport of the goods to be conveyed, even at high back pressures is prevented. Furthermore, a continuous operation should be possible.
  • the object of this invention is characterized in that at least one injector is arranged in the housing with which a medium under pressure can be introduced into the radial region between the housing and the screw.
  • the worm is preferably arranged axially stationary in the housing.
  • the at least one injector is preferably arranged in the sealing region of the screw.
  • the worm may have a base body with a core diameter, wherein the worm has at least one helical web around the main body rotating worm web with an outer diameter and wherein the difference between the outer diameter and core diameter in the catchment area is greater than in the sealing area.
  • the difference between the outer diameter of the screw land and the core diameter of the main body of the screw relative to the difference in the other sealing area can be increased.
  • a pressure drop is advantageously caused in the axial region in which the injectors are arranged, which facilitates the penetration of the supplied medium.
  • the screw in the axial region of the at least one injector, is provided with at least one radially inwardly extending groove.
  • at least one cleaning pin extending into the groove is arranged in the housing at the axial position of the at least one groove. This can be achieved that clogging of the groove, which can be done easily due to the compression process, is prevented.
  • the cleaning pin may have a cylindrical shape and radially from the inner Housing wall extending into the groove.
  • the groove has a rectangular shape in a sectional plane that includes the axis of the worm (ie in an axial section).
  • the groove may have a rectangular shape in the groove base, which widens in an arcuate manner (wave-shaped) towards the housing.
  • the groove has a V-shape in a sectional plane containing the axis of the screw, which opens at an angle to the housing, wherein the angle between the lateral boundary wall of the groove and the radial direction preferably between 10 ° and 60 °, more preferably between 20 ° and 45 °.
  • the material flow in the direction of the compressor area is then interrupted when large opposing forces occur due to the compression. Then, the conveying element tends to "spin", ie the delivery of material comes forcibly halted .. Reduced as part of countermeasures, the compression ratio between entry mass to Compaction mass, the conveying element tends to leak and thus to inoperability.
  • the housing is provided at least in the region of the at least one injector in its inner cylindrical surface with at least one recess.
  • the recess may be formed as a groove extending in the axial direction. A number of said grooves can be arranged equidistantly over the inner circumference of the housing bore.
  • the recess may also be formed as a circumferential annular groove. Furthermore, it is possible that the recess is formed as a helical groove extending. This can run in the same sense as the screw bridge or in the opposite direction to the screw bridge.
  • At least two helically extending grooves are present, at least one runs in the same sense as the screw land and at least one in the opposite direction to the screw land. Accordingly, it is also possible that combinations of helical grooves are provided, which run in the sense and in the opposite direction to the screw web. These can be catchy or multi-start helical grooves.
  • Said grooves or recesses are primarily used to increase the friction between conveyed and screw cylinder, whereby it is possible to work with higher back pressures (ie, with higher pressure gradients over the axial extent of the conveying element).
  • the groove has a rectangular shape in section.
  • the groove may also have a rectangular shape in section in the groove base, which widened in an arcuate (wavy) manner towards the worm.
  • the groove has a V-shape in section, which opens at an angle to the worm, wherein the angle between the lateral boundary wall of the groove and the radial direction preferably between 10 ° and 60 °, especially preferably between 20 ° and 45 °.
  • the material transport can be improved by the conveying element.
  • the method for carrying out a pyrolytic process using a conveying element of the type mentioned is carried out by feeding a material to be pyrolyzed at the entry point of the conveying element, conveyed by the catchment area of the screw, compacted in the compressor area of the screw and kept under pressure in the sealing area of the screw.
  • the material to be pyrolyzed is then fed under pressure behind the sealing area to a pyrolytic reactor, in which the material is subjected to the pyrolytic process.
  • the method is inventively characterized in that during the conveyance of the Guts by the conveying element via the at least one injector, a pressurized medium is introduced into the area between the housing and screw so that in particular no emissions of the material to be pyrolyzed from the conveying element escape.
  • a protective gas in particular argon, is supplied via the at least one injector.
  • a liquid or pasty medium can also be supplied via the at least one injector. This measure acts synergistically with the use of the above-described recesses in the screw and / or in the screw cylinder (housing).
  • the promotion of the material to be conveyed can be maintained at any time, even if a large pressure gradient is given over the axial extent of the conveying element.
  • a product medium taken from the pyrolytic reactor is fed to the pyrolytic process via the at least one injector.
  • media originating from the pyrolytic process for example, can be used for sealing material discharge.
  • the problem may arise that initially no material for conveying and thus for sealing in the screw is available for process reasons when starting the process.
  • the result would be an unacceptable pressure loss and a media outlet from the conveyor element.
  • a procedural training provides that prior to the promotion of pyrolysierendem good from the point of entry to the issuing point (ie in the intended direction) in an empty or largely empty conveyor element to be pyrolyzed Good or another medium in the region of the issuing point is fed to the conveyor element, the worm thereby turned counter to the conveying direction of the entry point to the issuing point and the supplied to be pyrolyzed Good or the other medium is at least promoted to the compressor area, only then the screw is rotated in the conveying direction of the entry point to the issuing point and conveyed via the entry point to be pyrolyzed Good to the issuing point.
  • the screw is rotated counter to the conveying direction from the point of entry to the dispensing point and the supplied material to be pyrolyzed or the other medium is conveyed into the catchment area.
  • the screw Prior to the rotation of the screw in the conveying direction from the point of entry to the discharge point, the screw can be stopped until the catchment area is sufficiently filled from the input point to be pyrolysierendem or with the other medium.
  • the proposed conveying element therefore permits emission-free operation of the system under internal pressure.
  • an emission-free dosage of at least partially solid substances that must be supplied under pressure to another processing plant, in particular a pyroformer, at the input of which there is a high back pressure.
  • the proposed solution thus allows a continuous, yet emission-free dosing of a good to be promoted in a plant, which are under high pressures and are processed in the toxic or emissions-critical substances.
  • an interruption of the promotion of the good to be promoted at high counter pressures is still effectively counteracted.
  • extruder-like conveying element preferably several substance entrances are provided.
  • a pressure gradient causes the substance to enter the housing of the conveyor element (i.e., there is a pressure increase in the direction of the process taking place inside the conveyor element).
  • a protective gas supply is applied to three injectors.
  • the screw diameter is reduced - in whatever way - at the locations of the injectors, ie at the site of substance ingress, in order to improve the possibility of entry of the medium due to the necessarily resulting material density reduction.
  • an emission-free conveying element for metering or removing at least partially solid substances in a system under pressure or out of this is proposed, wherein a media inlet is made possible in the pressurized conveying element.
  • the said medium can be a protective gas and / or a product medium which originates from the subsequent process, in particular from a pyrolysis process.
  • a pressure gradient is provided or generated, so that it is possible in a simpler manner to supply the medium via the injectors.
  • a preferred solution provides that a plurality of said conveying elements with respective injectors for the media inlet in a row, d. H. in series, are arranged.
  • relaxation zones may be provided in which a further conveying element is effectively connected.
  • the proposed conveyor element allows advantageously that a continuous delivery of a gaseous, liquid or solid medium can be done in a metered manner.
  • a product technical change of the medium to be conveyed or metered by the intended media entries (injectors) is possible.
  • the conveying path up to the connected system is constantly kept free from contamination.
  • Several protective media inlets allow the use of the conveyor element, ie the dosing device, in potentially explosive environments.
  • the processing of toxic substances is just as easily possible as a safe start-up or shutdown of the connected system.
  • the gas or media inlets ie the injectors
  • the injectors can also be used to supply product gases or product liquids.
  • a pyrolysis plant such z. B. already produced pyrolysis in the process area of the screw to be used for mixing with the material to be pyrolyzed in order to improve the rate of implementation of the device.
  • the seal is also improved.
  • the oily substances also serve to lubricate the screw, associated with an increased life of the device. This measure favors that an increase in the friction between the conveyed material and the screw cylinder occurs, for which purpose the said recesses in the screw and / or in the screw cylinder (housing) have a very advantageous effect.
  • the conveying element proposed according to the invention thus allows the conveyance of the material from an entry point to an exit point, whereby it is possible by the proposed embodiment to selectively separate the location of the material entry (material addition) and the material discharge (material delivery).
  • different pressures in different regions of the conveying element ie the screw, can be maintained. It can be made in the space between the housing bore and screw a separation zone or sealing zone, which can be controlled by the addition of a medium through the injectors.
  • the differential pressure between different axial positions of the conveying element may be positive from the material entry to the material discharge or vice versa. Thus, said differential pressure depending on the procedural wishes in the gradient and in be given the size.
  • FIG. 1 shows a device for carrying out a pyrolytic process in the side view, wherein a conveying element promotes pyrolysierendes Good in a pyroformer and wherein the conveying element is shown partially in section,
  • FIG. 2 in the illustration of FIG. 1 an alternative embodiment of
  • FIG. 3 shows the detail "Z" according to FIG. 1 in a first embodiment of the invention
  • FIG. 4 shows the detail "Z" of FIG. 1 in a second embodiment of the invention, wherein only the screw is shown
  • 5 shows the detail "Z" according to FIG. 1 in a third embodiment of the invention, wherein only the screw is shown
  • FIG. 4 shows the detail "Z" of FIG. 1 in a second embodiment of the invention, wherein only the screw is shown
  • 5 shows the detail "Z" according to FIG. 1 in a third embodiment of the invention, wherein only the screw is shown
  • Fig. 6 shows a screw of the conveying element according to an alternative to the figures 1 and 2 second embodiment
  • FIG. 7 shows a screw of the conveying element according to an alternative to the figures 1 and 2 third embodiment.
  • a system is shown, which consists of a conveying element 1, with which a good is promoted and pressurized before it is fed to a downstream pyrolytic reactor 16 (pyroformer).
  • pyrolytic reactor 16 pyroformer
  • the material is subjected to a pyrolytic process. The entire process is carried out by generating toxic or emission-critical substances, so that it must be ensured that no substances from the process get into the environment.
  • the conveying element 1 is designed as a screw conveyor unit. Accordingly, a screw 6 is arranged in a tubular housing 4 with a cylindrical bore, which is arranged axially stationary, but rotatable in the housing 4. The rotary drive of the screw 6 via a drive 5 (motor-gearbox combination). As a result, can be filled without pressure in a hopper 17, which is arranged at an entry point 2 of the conveying element 1. The delivery takes place up to a delivery point 3, at which the now pressurized material is fed to the reactor 16.
  • the worm 6 has a main body 13 around which, in a known manner, at least one worm web 14 extends in a helical manner.
  • a catchment area 7 in which the material is first conveyed in the axial direction a.
  • Adjoining the draw-in region 7 is a compressor region 8, in which the difference between the outer diameter D and the core diameter d decreases.
  • a good sealing effect between the screw 6 and the housing 4 results, so that the material located behind the sealing region 9 can be placed under high pressure.
  • the length and the degree of compaction of the sealing region 9 determine the possible (counter) pressure to be built up towards the reactor 16.
  • pins 18 are arranged in the housing, which break up the compressed material, so that it can be easily fed to the reactor 16.
  • the pins 18 are thus part of a crushing area.
  • At least one injector 10, 1 1 or 12 is arranged in the housing 4, with which a pressurized medium in the region between the housing 4 and screw 6 can be initiated.
  • this medium may be a protective gas, eg. As argon, or even to a pyrolysis (between) product, which is already added to the material in the conveyor element to improve the entire process.
  • the injectors 10, 1 1, 12 pass through the wall of the housing 4 and may be arranged radially or at an angle to the radial direction. In order for the medium to be able to better enter the material in the sealing area, measures are taken to lower the pressure at the axial location of the injectors 10, 11, 12. For this purpose, it can be seen in the embodiment that annular grooves 15 at the axial points of the injectors 10, 1 1, 12 are incorporated into the screw. The pressure drop due to the grooves 15 causes the medium to enter in an improved manner.
  • Fig. 1 shows a horizontally operating metering or conveying device.
  • Fig. 2 a variant is shown, which adjusts to a vertical conception.
  • the structure is basically the same as in the solution according to FIG. 1. It would be possible here because of the gravitational effect that in the catchment area 7 the helical structure of the screw flight 14 is reset or even partially eliminated altogether.
  • the material is also conveyed here from the hopper 17 via the compressor region 8 in the sealing region 9 and on to the output point 3.
  • the length and the compression Grad of the sealing region 9 in turn determine the achievable (counter) pressure in the region of the issuing point. 3
  • the injector 12 comprises a bore in the housing 4 which extends radially
  • a special embodiment of the invention is sketched, according to which an annular groove-like recess is arranged in the housing 4 in the radially inner end region of the bore, which circle runs circular and forms a closed annular groove , V-shaped, the angle of the wall of the annular groove is indicated by ß.
  • the trained as an annular groove 15 in the worm 6 is provided in the embodiment of FIG. 3 in the axial section with a rectangular cross-section.
  • annular groove 15 is formed in the axial section V-shaped.
  • the boundary wall 19 is therefore arranged at an angle ⁇ to the radial direction.
  • a groove 15 which is rectangular in the groove base is again provided, which, however, has an arcuate rounding toward the radially outer edge of the screw 6.
  • the influence range of the injector 10, 11, 12 or the injection can be improved.
  • two examples of screws 6 are shown, which are designed alternatively to the above exemplary embodiment.
  • a pellet-like mass can be metered.
  • This mass is conveyed by the screw 6 into the sealing region 9.
  • injectors 10, 1 1 and 12 present, which are arranged axially one behind the other in the conveying direction a, but offset in the circumferential direction about the housing 4 of the conveying element 1 around.
  • the first injector 10 is charged with an inert protective gas in the form of argon at a pressure of 3.5 bar.
  • the second injector 1 1 is also subjected to an inert protective gas in the form of argon at a pressure of 3.0 bar.
  • a product gas is fed to the pyrolysis from the reactor 16 under a pressure of 1.5 bar.
  • the process pressure is 0.3 bar. Approximately 10% of the protective gas enters via the first injector 10.
  • a pressure-tight discharge of solid or pasty products from the pressurized conveying element can be achieved.
  • Two of the illustrated conveying elements 1 are arranged one behind the other and provided with a further Substanzeinstory.
  • the worm shaft is strongly tapered (ie, the difference between the diameters D and D is increased), so that a strong relaxation of the discharged product takes place.
  • the second conveyor element 1 connected in series serves, in addition to the sealing, also for mixing product medium and extinguishing medium. It is possible according to the proposed solution to perform pyrolytic processes improved with the proposed conveyor element, in which a very high temperature in the material to be processed is required.

Abstract

L'invention concerne un élément convoyeur (1) destiné au transport d'un produit entre un point d'entrée (2) et un point de débit (3). Le produit peut être amené largement sans pression au point d'entrée (2) et il peut être maintenu à une pression prédéterminée au point de débit (3). L'élément convoyeur (1) comprend un carter (4) et au moins une vis (6) disposée à l'intérieur et entraînée par un mécanisme d'entraînement (5) en rotation autour d'un axe (a). La vis (6) possède au moins une zone d'aspiration (7), au moins une zone de compactage (8) qui la poursuit dans la direction de l'axe (a) et au moins une zone compactée (9) qui la poursuit dans la direction de l'axe (a). Afin, en particulier dans les processus pyrolytiques, d'assurer l'absence d'émissions avant le précompactage du produit à pyrolyser, il est disposé dans le carter (4) au moins un injecteur (10, 11, 12) grâce auquel un fluide sous pression peut être introduit dans la zone entre le carter (4) et la vis (6). L'invention concerne en outre un procédé de mise en œuvre d'un procédé pyrolytique en utilisant un tel élément convoyeur.
PCT/EP2012/001458 2011-04-06 2012-04-02 Élément convoyeur pour le transport d'un produit et procédé de réalisation d'un processus pyrolytique à l'aide d'un tel élément convoyeur WO2012136344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011016098.1 2011-04-06
DE102011016098 2011-04-06

Publications (1)

Publication Number Publication Date
WO2012136344A1 true WO2012136344A1 (fr) 2012-10-11

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WO (1) WO2012136344A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3063253A4 (fr) * 2013-10-29 2017-04-19 The Crucible Group Pty Ltd Convertisseur pour matériaux organiques
CN106833699A (zh) * 2017-04-06 2017-06-13 四川大宇中和农业科技发展有限公司 隔氧除尘的秸秆炭化装置
DE102017105617A1 (de) * 2017-03-16 2018-09-20 Börger GmbH Vorrichtung zum Fördern und Zerkleinern von trockenen organischen Stoffen
US11299677B2 (en) 2017-11-27 2022-04-12 PyroGenesys Limited Pyrolysis reactor and method of pyrolyzing biomass waste residue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646723A1 (de) * 1975-10-17 1977-04-28 California Inst Of Techn Verfahren und vorrichtung zur behandlung von kohle
DE4332865A1 (de) * 1993-09-27 1995-03-30 Siemens Ag Einrichtung zum Transport von Abfall in einem Pyrolysereaktor
NL1009664C2 (nl) * 1998-07-15 2000-01-18 Rollepaal B V Maschf De Werkwijze voor gefaseerde warmtebehandeling en inrichting voor het uitvoeren van die werkwijze.
EP2233547A1 (fr) * 2009-03-24 2010-09-29 Paolo Rebai Verfahren und chemischer Reaktor zur Herstellung gasförmiger Kohlenwasserstoffe aus Kunststoffmaterialien

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646723A1 (de) * 1975-10-17 1977-04-28 California Inst Of Techn Verfahren und vorrichtung zur behandlung von kohle
DE4332865A1 (de) * 1993-09-27 1995-03-30 Siemens Ag Einrichtung zum Transport von Abfall in einem Pyrolysereaktor
NL1009664C2 (nl) * 1998-07-15 2000-01-18 Rollepaal B V Maschf De Werkwijze voor gefaseerde warmtebehandeling en inrichting voor het uitvoeren van die werkwijze.
EP2233547A1 (fr) * 2009-03-24 2010-09-29 Paolo Rebai Verfahren und chemischer Reaktor zur Herstellung gasförmiger Kohlenwasserstoffe aus Kunststoffmaterialien

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3063253A4 (fr) * 2013-10-29 2017-04-19 The Crucible Group Pty Ltd Convertisseur pour matériaux organiques
US10364394B2 (en) 2013-10-29 2019-07-30 The Crucible Group Pty Ltd Converter for organic materials
DE102017105617A1 (de) * 2017-03-16 2018-09-20 Börger GmbH Vorrichtung zum Fördern und Zerkleinern von trockenen organischen Stoffen
CN106833699A (zh) * 2017-04-06 2017-06-13 四川大宇中和农业科技发展有限公司 隔氧除尘的秸秆炭化装置
US11299677B2 (en) 2017-11-27 2022-04-12 PyroGenesys Limited Pyrolysis reactor and method of pyrolyzing biomass waste residue

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