HU0200300A2 - Pyrolisis process and system for reclaiming desirable materials especially from cutted vehicle tires and pyrolisis system for reclaiming carbonised and waste iron from cutted vehicle tyres - Google Patents

Pyrolisis process and system for reclaiming desirable materials especially from cutted vehicle tires and pyrolisis system for reclaiming carbonised and waste iron from cutted vehicle tyres Download PDF

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Publication number
HU0200300A2
HU0200300A2 HU0200300A HU0200300A HU0200300A2 HU 0200300 A2 HU0200300 A2 HU 0200300A2 HU 0200300 A HU0200300 A HU 0200300A HU 0200300 A HU0200300 A HU 0200300A HU 0200300 A2 HU0200300 A2 HU 0200300A2
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HU
Hungary
Prior art keywords
pyrolysis
end
pieces
egyes egyes
rotary furnace
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Application number
HU0200300A
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Hungarian (hu)
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HU0200300A3 (en
Inventor
Bobby P. Faulkner
Roy W. Hansen
Robert J. Unterweger
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Svedala Industries, Inc.
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Filing date
Publication date
Priority to US09/264,948 priority Critical patent/US6221329B1/en
Application filed by Svedala Industries, Inc. filed Critical Svedala Industries, Inc.
Publication of HU0200300A2 publication Critical patent/HU0200300A2/en
Publication of HU0200300A3 publication Critical patent/HU0200300A3/en

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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/10Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/06Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall using revolving drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02Separating plastics from other materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02Separating plastics from other materials
    • B29B17/0206Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09CTREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; PREPARATION OF CARBON BLACK; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44Carbon
    • C09C1/48Carbon black
    • C09C1/482Preparation from used rubber products, e.g. tyres
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B1/00Retorts
    • C10B1/10Rotary retorts
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B47/00Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C10B47/28Other processes
    • C10B47/30Other processes in rotary ovens or retorts
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/07Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F23G5/0273Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using indirect heating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04Disintegrating plastics, e.g. by milling
    • B29B2017/0424Specific disintegrating techniques; devices therefor
    • B29B2017/0496Pyrolysing the materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00Pneumatic or solid tyres or parts thereof
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/80Compositional purity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00Specific waste
    • F23G2209/28Plastics or rubber like materials
    • F23G2209/281Tyres
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10General improvement of production processes causing greenhouse gases [GHG] emissions
    • Y02P20/14Reagents; Educts; Products
    • Y02P20/141Feedstock
    • Y02P20/143Feedstock the feedstock being recycled plastics
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling
    • Y02W30/622Separating plastics from other materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling
    • Y02W30/625Disintegrating plastics

Abstract

The present invention relates to a process for the extraction of individual components of a cut product by pyrolysis, a process for the extraction of certain components of a vehicle's tire by pyrolysis, a single component of a pyrolysis system for vehicle tires In the process of recovering individual components of the cut product of the present invention by pyrolysis, the product pieces are transported from a single container to a pyrolysis chamber; heating the product pieces to the first temperature of the first heating zone of the pyrolysis chamber; moving pieces of the product from the first heating zone to a second heating zone of the apirolizing chamber; heating the pieces of the product to a second temperature independent of the first temperature in the second heating zone; moving pieces of the product from the second heating zone to a third heating zone of the pyrolysis chamber; the pieces of the product are heated in the third heating zone to a third temperature independent of the second temperature; finally, the pieces of product are removed from the apirolizing chamber and the individual components are separated. In the process of extracting individual materials from vehicle cut tires by pyrolysis, the tire pieces are introduced into a rotary furnace (52) having a dispensing tip and an outlet end, which is generally air-free and is divided into heating zones; heating individual heating zones of the rotary furnace (52) to different operating temperatures; passing the tire pieces through the heating zones from the feed end (58) of the rotary furnace (52) to the outlet end of the rotary furnace (52) by pyrolizing the tire pieces during passage through the rotary furnace (52); removing the pyrolysed tire pieces from the rotary kiln (52); and separating the pyrolized tire pieces into various components. One pyrolysis system (10) according to the invention comprises a feeding chamber (32) for transferring vehicle tire pieces; a dispensing means for discharging the tire pieces from the metering chamber (32); comprising a dispensing tip (58) and an outlet end having a generally air-free pyrolysis section (14), the dispensing end (58) of which is formed of rubber tires receiving from the dispensing means, the pyrolysis section (14) being divided into several individual heating zones heating as they pass through the apirolizing section (14), further comprising pyrolizing the tire pieces from the feeding end (58) of the pyrolysis section (14) to the end of the outlet; and the pyrolysis section (

Description

A method to cut off components termékeióegyes pyrolysis' <t tNYERESERE procedural vehicles SOLT GUMIABRONCSAIBÓL MEAL COMPONENTS OF CERTAIN ^ t j TÖRTÉNŐKINYERÉSÉRE pyrolysis, pyrolysis system tire for vehicles of jCSAteÓL SPECIFIC COMPONENTS RECOVERY AND CUT pyrolysis system GUMIABRONCSAIBÓL charred STEEL MATERIAL WASTE AND EXTRACTION

The present invention relates to a process for the extraction of individual components of cut articles by pyrolysis, a process for the extraction of some components from vehicle tires by pyrolysis, a pyrolysis system for the recovery of components from vehicle tires and a pyrolysis system for carbonised material and scrap from vehicle tires. More generally, the present invention relates to the production of carbon black with a pyrolysis distillate of waste tires. In particular, the invention relates to a pyrolysis system and method for processing used tires, comprising the step of heating the oil feed gas and the material used for the extraction of the carbon black and waste steel and the heating of the oil and gas.

As the available landfill sites shrink, the disposal of used, environmentally-polluting tires for vehicles is a growing problem. In the United States alone, more than 280 million tires are used and transported to landfill sites each year. Although some of the used tires are recycled and reused in road surfaces and some are burned as fuel, more than 80% of used tires are landfilled. The neglect of used tires at landfill sites represents a significant waste of recyclable materials. Years ago, it was realized that used tires could be recycled by pyrolysis to produce valuable by-products that could be sold and reused. Pyrolysis generally refers to the decomposition or heat distillation of a substance. In the case of used tires, pyrolysis is carried out in an oxygen-free environment, generally at temperatures between 500 ° C and 800 ° C.

95371 -9392 / HG / GL

-2Recycling of used tires by pyrolysis makes it possible to extract significant amounts of oil, gas, soot and waste steel The apparatus of the present invention is expected to provide approximately 35 tonnes of carbon black and 10 tonnes of steel from 100 tonnes of used tires.

Although many devices have been developed to recycle used tires by pyrolysis, none have been completely successful. The problem with most of these devices was the presence of particulate material from the tires in the gas. Particulate matter, which is primarily carbon dust and fiberglass, gathers at the joints, vents, and flame arresters, thereby blocking the passageways, which increases the risk of explosion.

A further disadvantage of the known processes for the recycling of used tires by pyrolysis is that the solid carbonaceous materials produced during the process and the characteristics of the carbon black do not meet most of the commercial specifications for carbon black and are therefore not commercially available. In order to produce commercially available carbon black, heat energy must be invested in the oil recovered from the pyrolysis. Obviously, it would be much more efficient to obtain commercially available carbon black directly by pyrolysis of used tires.

A further disadvantage of the known pyrolysis devices is that there is oil contamination in the gaseous soot, which also commercially adversely affects the quality of the gaseous soot. In order to produce good quality carbon black, it seems that all the oil has to be removed. In the known pyrolysis plants, the oil distillate released from the pyrolyzed material is at least partially passed through or along with a product containing carbon black, which results in said product being contaminated with residual oil.

The handling of split tires is also a major challenge for known pyrolysis systems. The natural extensibility of the remaining steel structures and the heated rubber poses a major challenge for the transport of cut tires to be pyrolysed. Many known methods employ, for example, rotating screws for conveying cut tires to a burner in which pyrolysis occurs. Due to the nature of chopped tires, tires continue to be a problem in known equipment

The pieces of its -3 pieces are wound on the conveyor screw which leads to clogging of the conveyor screw.

Thus, there is a need for a pyrolysis system that efficiently and efficiently conveys vehicle cut tires to a rotary furnace in which pyrolysis takes place. It is a further object of the invention to operate the pyrolysis system in separate zones in order to process vehicle tires as efficiently as possible. It is a further object of the invention to carry out pyrolysis in separate zones, each of which operates at different temperatures in order to maximize the efficiency of pyrolysis. It is a further object of the invention to efficiently separate the waste steel and the recovered carbon black at the end of the rotary furnace. It is an object of the present invention to remove the oil-containing gas from the inside of the rotary furnace at a location sufficiently distant from the outlet end of the rotary furnace to prevent contamination of the carbon black.

The objects are achieved by a system and method of placing the cut tires in a metering chamber. The metering chamber generally comprises an air locking, two hinged door structure that prevents air from entering the metering chamber.

The metering chamber is connected to the first end of a metering device which is arranged to withdraw the pieces of tires from the metering chamber. In a preferred embodiment of the system of the invention, the metering means is a rotatable metering roller having first and second ends. The rotatable metering roller generally has a cylindrical body which also has first and second ends. The metering roller comprises a baffle plate along the inner surface of the cylindrical body. The baffle plate formed inside the metering roller extends from its first end to its second end. The baffle protrudes radially inwardly from the inner surface of the cylindrical body and passes helically from the first end of the metering roll to the second end thereof. When the metering roller is rotated, a baffle formed along its inner surface conveys the tire pieces from the metering chamber connected to the first end of the metering roll to the second end of the metering roll.

The second end of the metering roller is connected to a pyrolysis section in which the tire pieces of the vehicles are pyrolysed to their components, ie ♦ ♦ Μ 9

-4Separated into unsorted waste and steel-containing waste. The pyrolysis section is generally an oxygen-free environment in order to facilitate the pyrolysis that takes place therein. The pyrolysis section comprises a rotary furnace with an inlet and an outlet. The inlet of the rotary furnace is located higher than the outlet of the rotary furnace, so that both the rotary movement and the tilted position of the rotary furnace play a role in conveying the tire pieces in the rotary furnace. The inlet of the rotating furnace is connected to the second end of the metering roller and receives the tire pieces from the metering roller through it. The rotary furnace and the metering roller are preferably connected so as to rotate together.

The rotary kiln in the pyrolysis section is divided into several individual heating zones. Each individual heating zone is heated to a different operating temperature. The operating temperatures of each heating zone are independent of each other. Thus, as a result of the rotation of the rotary furnace, the tire pieces pass through the heating zones from the inlet of the rotary furnace to its outlet. As the tire pieces pass through the rotating furnace, they are subjected to pyrolysis.

In one embodiment of the system of the invention, the rotary furnace is divided into three separate heating zones, each operating at a different operating temperature. The operating temperature of the heating zones is suitably reduced from the inlet of the rotary furnace to its outlet. In a preferred embodiment of the system according to the invention, the operating temperature of the first heating zone closest to the inlet of the rotary kiln is between 700 ° C and 800 ° C. The operating temperature of the second heating zone following the first heating zone is between 600 ° C and 700 ° C, while the operating temperature of the third heating zone closest to the outlet of the rotary furnace is between 500 ° C and 600 ° C.

One feature of the system of the invention is that each individual heating zone is heated by a separate burner. Each burner is independently controlled by heating the respective individual heating zones to their respective operating temperatures.

Following the pyrolysis of the tire pieces, the tire pieces are led out of the rotary furnace outlet and led into a rotating drum attached thereto. The rotating drum generally has a cylindrical outer body with slits on its inner surface. The slits are suitably sized to permit the passage of a first material, namely the carbonised rubber, while preventing the passage of a second material, namely the steel-containing waste. In addition to the gaps formed in the rotating drum, there is a deflection channel which deflects the second material during rotation of the rotating drum, i.e. the waste steel, from the adjacent gap, thereby preventing the gap from blocking.

As the pyrolized tire pieces are passed through the rotating drum, the smaller carbonized particles are removed through the slits. The steel wire waste passes through the rotating drum and is discharged through its outlet. The decarbonated material and the steel wire waste are collected separately and processed in further units of the system of the invention.

From the outlet of the rotary furnace, an outlet tube extends into the open interior of the rotary furnace. The outlet pipe has a first end which is located inside the rotary furnace, preferably near the second heating zone. Preferably, the second end of the exhaust pipe is connected to a pump which, during pyrolysis, extracts the gases released from the tire pieces from the rotating furnace. The gases removed from the interior of the rotary kiln can later be used to remove oil and other materials that are removed from the tire pieces during pyrolysis. The outlet pipe, which discharges gases from the inside of the rotary furnace, on the one hand reduces the amount of dirt in the discharged gases and on the other hand prevents the gas carried by the gas from cooling and condensing in the separating portion near the rotary furnace outlet.

The invention will now be described in more detail with reference to the drawing. In the drawing:

Figure 1 is a schematic diagram of the pyrolysis system of the present invention, which retrieves certain components from the chopped tires of the present invention;

Figure 2 is a partially cross-sectional view of the introductory section and end of the dispensing section of the pyrolysis section of the pyrolysis system of the present invention;

Figure 3 is a partial cross-sectional view of the outlet end of a pyrolizing section containing a rotating drum separating certain components from the pyrolized tire pieces;

• · • · ·

Fig. 4 is a sectional view taken along line 4-4 of the assembly of Fig. 3 illustrating deflection channels and slots formed by a rotating drum separating each material; and

Figure 5 is a graph showing the number and volume distribution of the carbon black particles produced by the pyrolysis system of the present invention.

Figure 1 illustrates a pyrolysis system 10 for receiving cut-off tires and converting them to suitable materials by pyrolysis, such as carbon black containing carbon black, steel wire waste and oil containing gases.

The pyrolysis system 10 generally has a dispensing section 12, a pyrolysis section 14 and a separating section 16. The tire pieces of the vehicles are first introduced into the dispensing section 12, which comprises a conveying system that conveys the tire pieces to the pyrolysis section 14. As the tire pieces pass through the pyrolysis section 14, the light hydrocarbons in the tire pieces are discharged in the form of gases from the tire pieces. The remainder of the tire pieces contain, after pyrolysis, suitable materials, such as carbonised materials and steel wire waste. The residue exiting the pyrolysis section is fed to the separation section 16 where the appropriate materials are collected in separate piles. After separation, the separated materials can subsequently be recycled to the pyrolysis system 10 using known techniques and may be sold or recycled.

As shown in Figure 2, the vehicle tire pieces are first introduced in the direction of the arrow 20 into a dispensing funnel 18. In a preferred embodiment of the system of the invention, the tire pieces are either chopped by a conventional chopping process or shipped to a site from a remote chopping plant before being introduced into the hopper 18. In this case, the used tires are comminuted into pieces up to about 10 cm in diameter. The tire pieces are guided to the inlet opening of the dispensing funnel by means of a conventional conveyor belt.

Since the pyrolysis in the pyrolysis section 14 is to be carried out in an airtight environment, a couple of quick-release valves 22, which act as an air lock, are arranged inside the dosing funnel 18. Each of the 22 quick drain valves contains a • · ·

A rotatable gate 24 which is pivotally mounted between a closed position and an open position in the generally open interior of the dispensing hopper 18. The gates 24 interact with the inner wall of the quick-release valves 22 to provide a generally airtight seal in the dispensing funnel 18. As shown in the upper quick-release valve 22, the gates 24 are closed by a counterweight 26 fixed to a rod 28.

Initially, both gates 24 of the quick release valves 22 are closed and the dotted tire pieces 30 in Figure 2 are dropped onto the closed gate 24 of the upper quick release valve 22. The gate 24 of the upper quick release valve 22 is pivoted downwardly and allows the tire pieces to fall onto the closed gate 24 of the lower quick release valve. While the gate 24 of the lower quick release valve 22 retains the tire pieces 30, the gate 24 of the upper quick release valve 22 returns to its closed position and seals the dispensing funnel 18. After the gate 24 of the upper quick release valve 22 is closed, the gate 24 of the lower quick release valve 22 opens and allows the tire pieces 30 to fall into a metering chamber 32. This process is repeated continuously, thereby introducing the tire pieces into the metering chamber 32 such that the quick-release valves 22 form an air lock, thereby allowing only a limited amount of outside air to enter the metering chamber 32 at the same time as the tire pieces.

The metering chamber 32 is sized to store a predetermined amount of tire pieces through the quick-discharge valves 22 of the metering hopper 18. The metering chamber 32 has two topsheets 34 and an open interior 36 for storing the tire pieces. Although not shown in Figure 2, a nitrogen source is connected to the dosing chamber 32 to expel air from the dosing chamber 32 and the remainder of the pyrolysis system 10 connected to the dosing chamber 32. Air in the pyrolysis system 10 is replaced with nitrogen because nitrogen is a gas which is inert to pyrolysis and thus does not affect pyrolysis in the pyrolysis system 10.

As shown in Figure 2, the dosing section 12 also includes a rotatable dosing roller 38 located between the dosing chamber 32 and the pyrolysis section 14. The dispensing roller 38 has a cylindrical body 40 having a first end 42 and a second end 44. The inner baffle plate 46 of the feed roller 38 · · · ·

- 8, which spirally extends inside the cylindrical body 40 from its first end 42 to its second end 44. The baffle 46 protrudes radially inwardly from the inner wall 48 of the cylindrical body 40 and has a radial height less than the radius of the cylindrical body 40. In a preferred embodiment of the system according to the invention, the cylindrical body 40 has an outer diameter of about 96 cm and a radial protrusion of the baffle plate 46 from the surface of the inner wall 48 of about 33 cm.

The feeding roller 38 is pivotally rotated about its longitudinal axis. The baffle plate 46 formed inside the metering roller 38 acts as an Archimedes screw and transmits the tire pieces from the first end 42 of the metering roller 38 to the second end 44 thereof. Since the baffle plate 46 protrudes radially inwardly from the surface of the inner wall 48, bonding of the tire pieces to the dispensing cylinder 38 can be virtually eliminated as the tire pieces extend from its first end 42 to its second end 44. In a preferred embodiment of the system according to the invention, the pitch of the baffle plate 46 is about 96 cm which provides adequate flow of material between the dosing chamber 32 and the pyrolysis section 14.

As shown in Figure 2, the first end 42 of the feed roller 38 is defined by the shape of the baffle plate 46. In this way, the first end 42 of the metering roller 38 forms a dipping means which, during rotation of the metering roller 38, extracts the tire pieces from the open interior 36 of the metering chamber 32.

A seal 50 is placed around the dispenser roll 38 where the dispenser roll 38 enters the dispensing chamber 32. As the dosing roller 38 rotates relative to the stationary dosing chamber 32, the gasket 50 prevents air from entering the pyrolysis system 10 when fitting the dosing roller 38 and the dosing chamber 32.

As shown in Figures 1 and 2, the pyrolysis section 14 generally comprises a rotary furnace 52 which passes through an insulated boiler 54. The rotary furnace 52 has a generally cylindrical container 56 having a feeding end 58 and an outlet end 60. The rotary furnace 52 rotates about its longitudinal axis and is inclined such that the end of the dispenser 58 is located vertically above the outlet end 60, thereby facilitating the flow of tire material 61 through the rotary furnace 52 through its dispenser 58. from end to end of 60 outlets.

As shown in Figure 2, the feed roller 38 passes through the feed end 58 of the rotary furnace 52 and penetrates an open interior 62 defined by the container 56. The feed roller 38 also passes through a closure plate 64 which is removably connected to a feed end 58 of the rotary furnace 52 by a pair of fasteners 66. The feed roller 38 is surrounded by a seal 68 which provides an airtight seal between the rotary furnace 52 and the feed roller 38, thereby preventing the entry of outside air into the pyrolysis system.

The feed end 58 of the rotary furnace 52 also includes a hollow, unheated, elongated portion 70 that extends parallel to the longitudinal axis of the boiler 54 and extends beyond the insulated outer wall 72 of the boiler 54. The elongated portion 70 is bordered on one side by the barrier plate 64 and on the other by an internal dam 74 projecting radially from the inner wall 76 of the tank 56 of the rotary furnace 52. As soon as a

The tire pieces conveyed by the rotating metering roller 38 shown in Figure 2 are located in the inner space 62 of the rotary furnace 52 located behind the inner dam 74. In a preferred embodiment of the system according to the invention, the cylindrical body 40 of the feed roller 38 is fixedly fixed to the inner barrier 74 near the second end 44 such that the feed roller 38 rotates with the rotary furnace 52.

In a preferred embodiment of the system according to the invention, the rotary furnace 52 is provided with a drive mechanism 78 at its dispensing end 58 which rotates the rotary furnace 52 and the dispensing roller 38. The rotational speed of the rotary furnace 52 is determined in part by the time it takes for the material stream 61 to pass through the rotary furnace 52 from its feed end 58 to its outlet end 60. It will be appreciated that a faster rotation of the rotary furnace 52 will move the material stream 61 at a higher speed from the feed end 58 to the outlet end 60, while the lower rotational speed of the rotary furnace 52 will increase the time during which the material stream 61 stays inside the rotary furnace 52.

Returning to Figure 1, boiler 54 surrounds a portion of rotary furnace 52 and includes a plurality of individual burners 80a-80c which heat the outer vessel 56 of rotary furnace 52. Each burner 80a-c operates independently so that different portions of tank 56 of rotary furnace 52 are different

It is heated to -10. In this way, the burners 80a-c form unique heating zones along the length of the rotating furnace 52. Each burner 80a-c is fed from a separate fuel source via conduit 82. In a preferred embodiment of the system of the invention, each burner 80a-c is provided with natural gas through the conduits 82. Although not shown in the drawing, each burner 80a-c is provided with a control mechanism and temperature sensing means that monitors and controls the operation of the respective burners 80a-c, thereby keeping each heating zone at the desired operating temperature.

The burners 80a-c are located below the tank 56 of the rotary furnace 52 and thus heat the vessel 56 while the rotary furnace 52 is rotating in the boiler 54. The heat generated by the burners 80a-c is passed through the reservoir 56 to the tire pieces moving in the rotary furnace 52 from its dispensing end 58 to the outlet end 60. As shown in FIG. Arranged in the boiler 54 are pipes 83 which discharge the combustion products produced by the burners 80a-c.

In a preferred embodiment of the system according to the invention, each heating zone is heated to a different operating temperature. In a preferred embodiment of the system according to the invention, the operating temperature of the heating zones formed along the length of the rotating furnace 52 decreases from the dispensing end 58 to the outlet end 60. Variation of the operating temperature along the longitudinal axis of the rotary furnace 52 allows for a more efficient pyrolysis of the stream 61 of material passing through the rotary furnace 52, thereby leaving a more commercially advantageous end product of the rotary furnace 52 at its outlet 60.

The material stream 61 containing tire pieces entering the open interior 62 of the rotary furnace 52 is heated to a first operating temperature by means of a burner 80a located at the feed end 58 of the rotary furnace 52. In a preferred embodiment of the system of the invention, the first burner 80a maintains the first heating zone of the rotary furnace 52 at an operating temperature of 700 ° C to 800 ° C. However, the optimum operating temperature for the first heating zone is between 700 ° C and 750 ° C. As the tire pieces pass through the first heating zone, they heat up rapidly under high operating temperatures, which aids in their further grinding and evaporation of some of the light hydrocarbons in the tire pieces. The kipa • · ·

- 11 the spilled hydrocarbons in the form of liberated gases are discharged into the open interior 62 of the rotary furnace 52.

Leaving the first heating zone of the rotary furnace 52, the material stream 61 enters a second heating zone having a second operating temperature controlled by the burner 80b. The operating temperature of the second heating zone is lower than the operating temperature of the first heating zone, but high enough to allow the pyrolysis inside the rotary furnace 52 to continue. In a preferred embodiment of the system of the invention, the operating temperature of the second heating zone is between 600 ° C and 700 ° C, but the optimum operating temperature is about 600 ° C. While the material stream 61 of the tire pieces is in the second heating zone, the second operating temperature causes additional light materials to evaporate from the tire pieces and release into the open interior 62 of the rotary furnace 52 in the form of release gases.

After passing through the second heating zone, the material stream 61 consisting of the tire pieces is sent to a third heating zone having a third operating temperature controlled by the burner 80c. In a preferred embodiment of the system of the invention, the third operating temperature is lower than the second operating temperature. The third operating temperature of the third heating zone is preferably between 500 ° C and 600 ° C, optimally about 500 ° C. As long as the tire pieces are in the third heating zone, additional materials will evaporate from the tire pieces at a temperature close to the operating temperature of the third heating zone. By the time the tire pieces pass through the third heating zone and leave the boiler 54, the stream 61 contains only about 1% volatile material, since the other volatile material is removed earlier during pyrolysis in the rotary furnace 52.

As shown in Figure 3, the outlet end 60 of the rotary furnace 52 extends beyond the outer wall 72 of the boiler 54. A seal 84 is provided between the reservoir 56 of the rotary furnace 52 and an aperture 86 formed on the stationary outer wall 72. A second drive 88 is connected to the tank 56 of the rotary furnace 52, which rotates the rotary furnace 52 about its longitudinal axis.

The outlet end 60 of the rotating furnace 52 extends over the boiler 54 as shown in Figures 1 and 3 and penetrates into the separating section 16. The outlet end 60 extends into the opening 90 of a housing 92 defining an interior 94 which is generally open. The tank 56 of the rotary furnace 52 is surrounded by a seal 96 which provides an airtight seal around the opening 90 on the housing 92, thereby preventing the entry of outside air into the open space 94.

The rotary furnace 52 comprises a drum screen 98 extending axially inwardly from the outlet end 60 along its periphery. The drum screen 98 separates the materials remaining after pyrolysis in the heating zones 52 of the rotary furnace 52 in boiler 54. In this case, the tire pieces are pyrolyzed to carbonized material and steel wire waste. The 98 drum screen separates the carbonized material from the tire pieces and the steel wire waste.

As shown in Figure 4, the drum screen 98 generally has open slots 100 that are spaced apart along the cylindrical circumference 101 of the drum screen. The drum screen 98 is preferably formed as part of the tank 56 of the rotary furnace 52 so that its outer circumference is the same as that of the rotary furnace 52. The slots 100 are dimensioned to allow passage of carbonated material while preventing the passage of larger amounts of steel wire containing waste.

Separation of the carbonized materials from the steel wire waste can be further facilitated by placing baffles 102 along slits 100 along the outer circumference of the drum screen 98. The baffles 102 deflect the steel-wire debris away from the slots 100, thereby preventing them from clogging while allowing the charred grains to pass through the slots 100. As shown in FIG. 4, each baffle plate 102 has an oblique baffle plate 104 which protrudes from the surface of the mantle 101 and terminates at a leading edge 106 located near the slot 100. The baffle plate 104 prevents the steel wire-containing waste from coming into contact with the open slot 100, thereby preventing the slot 100 from blocking.

As shown in Figure 3, the carbonized material 108 removed by the drum screen 98 from the stream 61 passes through the slots 100 of the drum screen 98 and exits the rotary chamber 56 via a drop line 110. Drop line 110 directs the removed carbonized material 108 into a collecting container 112. Separate 108 in the 112 collection container • · · «

The carbonized material can then be processed into a commercially available carbon black by conventional processing techniques, which can then be used for known purposes.

Behind the drum screen 98, the steel wire-containing waste remaining in the stream 61 is discharged from the system at the end 60 of the rotary furnace 52. The steel wire-containing waste discharged from the outlet end 60 is discharged through a drop pipe 114 to a collecting container 116. The steel wire waste collected in the hopper 116 is subsequently processed and sold as a product suitable for conventional applications, such as making new tires.

Although the slots 100 in the drum screen 98 are configured to prevent the passage of a large portion of the steel wire containing waste, a small portion of the steel wire containing waste passes through the slots 100 of the drum screen 98 and is thus transferred to the collection container 112. For this reason, the carbonized material 108 in the collecting container 112 is generally passed through a magnetic separation unit located downstream of the collection container 112, which removes the steel wire containing waste from the carbonated material 108. The steel wire waste material thus removed is then mixed with the steel wire waste collected in the hopper 116 and sold as described above.

Returning to Figure 1, a pair of insulating gates 118 are disposed between the collection tanks 112 and 116 and the corresponding drop pipes 110 and 114. The sealing gates 118 prevent air from entering the pyrolysis system 10 when emptying the carbonized material 108 or the steel wire-containing material into the respective collecting container 112, 116. In addition to isolating the storage tanks 112 and 116, a nitrogen source is connected to the insulating gates 118 to flush out any air entering the pyrolysis system 10 from outside.

As shown in Figures 1 and 3, a gas outlet conduit 120 extends into the open interior 62 of the rotary furnace 52 to conduct gases formed during pyrolysis. In this case, the first end 122 of the gas outlet tube 120 extends axially inwardly from the outlet opening 60 of the rotary furnace 52 and is generally located in an area corresponding to the second heating zone of the rotary furnace 52. The gas outlet tube 120 passes through the outer wall of the housing 92 and is connected to a pump (not shown). The pump extracts the gases released from the open interior 62 of the rotary furnace 52. Because the gases released are removed before the separation section 116, the exhaust gases contain substantially less air pollutants than before. In previous pyrolysis systems, the gases were vented from the housing 92 of the separation section 16 to the atmosphere. Because the gases are removed at higher temperatures than before, the oil in the gases does not separate and does not coat the internal structure of the separation section 16, unlike known pyrolysis systems. The gases discharged through the gas outlet pipe 120 are subsequently processed in a known manner. For example, the effluent gases are cooled and the oil particles extracted therefrom to produce a commercially available oil. In addition, the gases may be washed and other materials may be extracted therefrom by well known processes.

As will become apparent from the present specification, the tire pieces are pyrolyzed as long as they remain in the appropriate portion of the rotary furnace 52 arranged in the boiler 54. The pyrolysis rate is controlled by the operating temperatures of the heating zones located along the rotating furnace 52. However, the rate of pyrolysis can also be controlled by the rate of flow of the material 61 between the feed end 58 and the outlet end 60 of the rotary furnace 52. The passage of the tire pieces through the rotating furnace 52 is controlled by the inclination and rotational speed of the rotating furnace 52.

Testing the pyrolysis system 10 according to the invention, when each heating zone was operated at different operating temperatures, produced an average of 35 tons of carbon black and 11 tons of steel scrap from 100 tons of tires. The result is significantly more favorable than in previous pyrolysis systems, where pyrolysis was carried out at a constant temperature in a rotary furnace.

In addition to producing larger amounts of carbon black from the same amount of tires, the pyrolysis system 10 of the present invention is capable of producing gas of substantially higher quality than known pyrolysis systems. The

Figure 5 is a graph showing the particle size distribution of the carbon black produced by the pyrolysis system 10 of the present invention as a result of the test.

- 15Carbonized Material Analysis Approximate Analysis

Received raw material Dry raw material Humidity [%] 0.74 XXXXX Ash[%] 15.26 15.37 Volatile matter [%] 4.3 4.33 Carbon bound [%] 79.7 80.3 Altogether [%] 100 100 kWh / kg 27 376 27581 Sulfur [%] 2.8 2.9 MAF [kWh] 14796 Final analysis Received raw material Dry raw material Humidity [%] 0.74 XXXXX Carbon [%] 80 80.6 Hydrogen [%] 0.76 0.77 Nitrogen [%] 0.28 0.28 Sulfur [%] 2.88 2.9 Ash [%] 15.26 15.37 Oxygen [%] 0.08 0.08 Altogether [%] 100 100

The system and method of the invention may be modified at will within the scope of the claims.

Claims (35)

  1. PATENT CLAIMS
    A process for recovering individual components of a cut product by pyrolysis, comprising transporting the product pieces from a container to a pyrolysis chamber; heating the product pieces to a first temperature of the first heating zone of the pyrolysis chamber;
    transferring pieces of product from the first heating zone to a second heating zone of the pyrolysis chamber;
    heating the pieces of product in the second heating zone to a second temperature independent of the first temperature;
    transferring pieces of product from the second heating zone to a third heating zone of the pyrolysis chamber;
    heating the pieces of product in the third heating zone to a third temperature independent of the second temperature; finally, removing pieces of product from the pyrolysis chamber and separating the individual components.
  2. Method according to claim 1, characterized in that the pieces of the product are introduced into the pyrolysis chamber by rotating a dispensing roller with a baffle plate along its inner wall, such that by rotation of the dispensing roller the product pieces from the first end of the dispensing roller to the second end.
  3. The process according to claim 1, wherein the pyrolysis chamber is rotated to pass portions of the product through the pyrolysis chamber.
  4. A process according to claim 1, characterized in that the gases released from the product pieces are discharged near the second heating zone of the pyrolysis chamber.
    «* ♦ · ♦
    -175. Method according to claim 4, characterized in that an outlet tube with a first end near the second heating zone and a second end connected to a pump is inserted into the pyrolysis chamber and the gases are sucked out of the pyrolysis chamber.
  5. The process of claim 1, wherein the first temperature is set higher than the second temperature and the second temperature is set higher than the third temperature.
  6. 7. The method of claim 6, wherein the first temperature is set at between 700 and 800.
  7. The process of claim 7, wherein the second temperature is set at between 600 ° C and 700 ° C.
  8. 9. The process of claim 8, wherein the third temperature is set at between 500 ° C and 600 ° C.
  9. The method of claim 1, wherein, when separating the components, the processed pieces of the product are introduced into a rotating drum screen with slots and baffles, which are sized to allow the carbonized materials to contain the steel-containing materials. but prevent them from passing through the gaps; and the carbonized material passed through the drum screen and the steel-containing material are collected separately.
  10. A method for recovering certain materials from pyrolysis vehicle cut tires by introducing the tire pieces into a rotary furnace having a metering end and an outlet end, which is generally air-free and divided into heating zones;
    -18 egyes »* · · ♦ ♦ ♦ egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes egyes
    passing the tire pieces through the heating zones from the feed end of the rotary kiln to the outlet end of the rotary kiln by pyrolyzing the tire pieces as they pass through the rotary kiln;
    removing the pyrolized tire pieces from the rotating furnace; and separating the pyrolysed tire pieces into various components.
  11. A method according to claim 11, characterized in that when transferring the tire pieces from the feed end of the rotary kiln to the outlet end of the rotary kiln, the feed end is raised vertically above the outlet end so that the tire pieces are inclined by tilting the rotary kiln. rotating oven.
  12. 13. The process of claim 11, wherein the pyrolysis in the rotary furnace comprises venting the gas from the tire pieces at a location near the outlet end of the rotary furnace.
  13. A method according to claim 13, characterized in that, at the outlet of the gases, an outlet pipe having a first end axially inward from the outlet end of the rotary furnace and a second end connected to the pump is disposed in the rotary furnace and gas is removed from the rotary furnace via a pipe.
  14. Method according to claim 11, characterized in that each heating zone of the rotary furnace is heated by its own burner and the individual burners are independently controlled so that the different heating zones are heated to different operating temperatures.
  15. The method of claim 11, wherein the heating zones are heated from the feed end of the rotary furnace to the operating temperature of the rotary furnace at a decreasing temperature.
    -1 917. The process of claim 16, wherein the rotary furnace is divided into three heating zones, wherein the first heating zone is operated at 600 ° C to 800 ° C, the second heating zone is operated at 600 ° C to 700 ° C, and the third zone is operated at temperatures between 500 ° C and 600 ° C.
  16. The method of claim 11, wherein the tire pieces are conveyed to the rotary furnace by means of a rotatable metering roller having a baffle plate on its inner wall, the baffle plate being formed so that the tire pieces are rotated in a first rotation thereof. from end to second.
  17. 19. The method of claim 18, wherein the tire pieces are conveyed by a spiral-like baffle projecting radially inwardly from the inner wall of the metering roll from the first end to the second end of the metering roll.
  18. A method according to claim 11, characterized in that, when the individual components are separated, the pyrolysed tire pieces are introduced into a rotating drum screen with slots and baffles, wherein the slits and baffles are sized to allow a first component to pass through the slots. but prevent the passage of a second component through the gaps; and collecting, in a first place, the first ingredient passed through the drum screen, and in a second place, separated from the first site, collecting the second ingredient.
  19. 21. A pyrolysis system for the extraction of certain materials from automotive tires comprising a metering chamber for transferring vehicle tire pieces; a means for dispensing the tire pieces from the metering chamber;
    -20 · comprises a pyrolysis section having a dispensing end and an outlet end, generally air-free, the dispensing end being formed by the tire means from the dispensing device, the pyrolysis section being divided into a plurality of individual heating zones, each individual heating zones having different operating temperatures and heating the tire pieces as they pass through the pyrolysis section, and the pyrolysis section being pyrolysed from the end of the dispenser to the end of the outlet; and means for separating each component adjacent to the pyrolysis section.
  20. 22. The pyrolysis system according to claim 21, wherein the heating zones have a decreasing operating temperature from the feed end of the pyrolysis section to the outlet end thereof.
  21. A pyrolysis system according to claim 21, characterized in that the pyrolysis section is divided into three heating zones with different operating temperatures.
  22. 24. The pyrolysis system of claim 23, wherein the first heating zone has an operating temperature of 700 ° C to 800 ° C, a second heating zone operating temperature of 600 ° C to 700 ° C, and a third heating zone operating temperature. It is between 500 ° C and 600 ° C.
  23. 25. The pyrolysis system of claim 21, wherein the pyrolysis section comprises a rotary furnace having a dispensing end and an outlet end, which is divided into heating zones.
  24. 26. The pyrolysis system of claim 25, wherein the pyrolysis section comprises burners, each of which is associated with one of the heating zones, and which can be independently controlled to heat the respective heating zone to different operating temperatures.
    -21
  25. 27. The pyrolysis system of claim 21, wherein the dispensing means comprises a rotatable dispensing cylinder having a first end connected to the dispensing chamber and a second end connected to the pyrolysis section, the inner wall of which is provided with a baffle transmitting the tire pieces from the first end of the metering roll to the second end as the metering roller rotates.
  26. 28. The pyrolysis system of claim 27, wherein the baffle protrudes radially inwardly from the inner wall of the metering roll and spirally extends from the first end of the metering roll to the second end of the metering roll.
  27. A pyrolysis system according to claim 21, characterized in that the separation means comprises a rotatable drum screen connected to the outlet end of the pyrolysis section, having gaps formed at a defined distance in the periphery thereof, permitting a first component, and are designed to prevent passage of the second component.
  28. 30. The pyrolysis system of claim 29, wherein the outer circumference of the drum screen has baffles adjacent each slot to divert the second component from the adjacent slot as the drum screen rotates.
  29. 31. A pyrolysis system according to claim 21, characterized in that it comprises a gas outlet pipe having a second end connected to a first end and a pump located in the pyrolysis section and guiding the gases through the gas outlet pipe at a defined distance from the outlet end. away from the pyrolysis section.
  30. 32. A pyrolysis system for recovering carbonized materials and steel-containing materials from vehicle tire pieces, comprising a feeding chamber for transferring the tire pieces;
    -22 comprising a rotatable metering roller having a first end and a second end, the first end of which is connected to the metering chamber and having a baffle conveying the tire pieces from the first end of the metering roll to its second end along the inner wall thereof; end to end;
    comprising a rotary furnace having a dispensing end and an outlet end, the dispensing end of which is disposed on receiving portions of the tire from the dispensing cylinder and is divided into heating zones, each of which has different operating temperatures and pyrolizing the tire pieces as they travel from the feed end of the rotary furnace to the outlet end thereof; and a rotatable drum screen separating the carbonized materials from the steel-containing materials at the outlet end of the pyrolysis section.
  31. 33. The pyrolysis system of claim 32, wherein the heating zones are operable from the feed end of the rotary furnace to the outlet end of the rotary furnace.
  32. 34. A pyrolysis system according to claim 32, characterized in that a feed roller is connected to the rotary furnace and thereby rotates with it.
  33. 35. A pyrolysis system according to claim 32, characterized in that slots are located at a defined distance on the outer circumference of the rotatable drum screen and baffles adjacent to each slit, which are sized to allow the passage of carbonated materials but prevent the passage of steel-containing materials.
  34. 36. The pyrolysis system of claim 32, wherein the rotary furnace comprises burners, each of which is associated with one of the heating zones, and which burners are independently controllable to provide different operating temperatures for different heating zones.
    -23a «· · a
  35. 37. The pyrolysis system of claim 36, wherein the rotary furnace is divided into three heating zones, each having a different operating temperature, wherein the operating temperature of the first heating zone is higher than the operating temperature of the second heating zone and the operating temperature of the second heating zone. , as the operating temperature of the third heating zone.
HU0200300A 1999-03-09 2000-02-29 Pyrolisis process and system for reclaiming desirable materials especially from cutted vehicle tires and pyrolisis system for reclaiming carbonised and waste iron from cutted vehicle tyres HU0200300A3 (en)

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US6221329B1 (en) 2001-04-24
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