Classifications

• • 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
  • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
• • 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
  • C10B7/14—Coke ovens with mechanical conveying means for the raw material inside the oven with trucks, containers, or trays
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
  • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
  • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
  • F23G5/44—Details; Accessories
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
  • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
  • F23G5/44—Details; Accessories
  • F23G5/442—Waste feed arrangements
  • F23G5/444—Waste feed arrangements for solid waste

Definitions

• the present invention relates to an installation for the treatment by thermolysis of waste.
• the chambers are insulated from each other in a substantially sealed manner, by guillotine doors actuated by jacks; the door between the dehydration and thermolysis chambers and the door between the thermolysis and cooling chambers are vertically movable in sealed housings, the crossing of the lifting cylinders being by stuffing box.
• watertight doors are provided at the entrance to the dehydration chamber and at the exit from the cooling chamber, whereby the dehydration and cooling chambers are, as desired, isolated from the outside. and / or the thermolysis chamber. This limits the air intake into the thermolysis zone during the introduction of the products and during the extraction of the residues.
• the dehydration chamber of the thermolysis chamber is thus isolated alternately as required when the products are introduced into the dehydration chamber and the thermolysis chamber of the cooling chamber when the residues from this third chamber are extracted.
• the products to be treated are placed in carriages which pass from one room to another via a rack and pinion mechanism. Such a system is generally satisfactory. However, it is difficult to maintain and repair the technical means relating to the doors separating the thermolysis chamber from the dehydration chamber and the cooling chamber. This results in high maintenance and repair costs.
• the present invention aims in particular to overcome these drawbacks.
• thermolytic treatment of waste comprising: a substantially horizontal thermolysis oven and intended to receive at least one trolley for receiving waste intended to be treated by thermolysis; characterized by means of transporting trolleys, to bring, under an inert atmosphere, each trolley loaded with waste to a sealed oven access door and recovering them, under an inert atmosphere, after thermolysis treatment, from this door or near a sealed oven exit door; means for transferring each carriage from the means of transport to the thermolysis oven and vice versa; and means for establishing a tight connection between the transport means and the thermolysis oven during the transfer of each carriage from the transport means to the thermolysis oven and vice versa.
• thermolysis oven no door clogs the interior of the thermolysis oven.
• the means of transport under an inert atmosphere serve here as an airlock isolating the thermolysis oven from the outside, both when a trolley loaded with waste is introduced into the furnace and when a trolley is recovered from it. loaded with residue.
• the oven comprises means for driving several carriages in the thermolysis oven, between a sealed entry door and a sealed exit door.
• the installation may include a plurality of independent chambers, each forming a thermolysis oven for a single trolley loaded with waste and each having a sealed access door for passage of the trolley, each of these chambers being served by the means transport.
• the installation also includes a cooling zone for each of the carts loaded with residues, equipped with a sealed access door and served by the means of transport.
• the carriages can be cooled using a cold gaseous fluid, nitrogen or even water.
• thermolytic waste treatment installation in the form of a plurality of autonomous modules served by the means of transport.
• Those skilled in the art thus have more freedom of design and layout.
• the means of transport comprise at least one charger circulating on rails and defining a chamber for receiving a carriage closed in a sealed manner by a door.
• FIG. 1 is a very schematic plan view of an installation according to the invention.
• Figure 2 is a very schematic plan view of a variant of the installation according to the invention
• Figure 3 is a very schematic plan view of another variant of the installation according to the invention.
• FIG. 1 shows an installation for thermolytic treatment of waste, such as urban and / or industrial waste, in accordance with the present invention. It includes in particular a zone or unit 10 for loading carriages, a thermolysis oven 20, a residue cooling unit 30 and means for transporting the carriages 40.
• the loading unit 10 is equipped with a hopper 11 for loading trolleys 12 of waste intended to be treated in the thermolysis oven 20.
• the trolley 12 loaded with waste is then brought to an exit door 13 of the unit 10 or placed in a waiting position before being presented to this door 13.
• the waiting position is represented by the carriage 12 placed at the right end of the unit 10 in FIG. 1.
• the carriages 12 used in the present installation can, for example, be of the type described in international patent application WO-98/16594, which comprise two parallel beams resting in rotation on two rows of rollers.
• the transport means 40 include a charger 41 movably mounted on rails 42, so that the charger 41 can serve the loading unit 10, the thermolysis oven 20 and the cooling zone 30.
• the charger 41 defines a receiving chamber for a carriage 12, closed in leaktight manner by a door 43.
• this charger 41 will appear in front of the door 13 of the loading unit 10.
• the doors 13 and 43 are then opened and the carriage loaded with waste to be treated is transferred to the charger 41.
• the means allowing the transfer of the carriage from the unit 10 to the charger 41, but also from the charger 41 to the thermolysis furnace 20 or vice versa and to the cooling unit 30 are constituted by a manipulator arm 45 in traction or in pushing .
• the door 43 allows the charger 41 to be closed in a sealed manner. It is for example constituted by a door movable transversely in sealed housings (register).
• the door 13 can also be of this type.
• pumping means (not visible in FIG. 1) are connected to the charger 41, by means of a connector. After emptying the charger 41 with the aid of these pumping means, an inert gas, such as nitrogen, is injected inside the charger 41 from a source of inert gas. Since such means for evacuating and injecting inert gas are well known to those skilled in the art, they will not be described in more detail here. It will simply be noted that these means can, as a variant, be mounted directly on the charger 41.
• the charger 41 Once the charger 41 in an inert atmosphere, it is brought in front of a sealed entry door 21 of the thermolysis oven 20. Means for establishing a sealed connection between the charger 41 and the thermolysis oven 20 are then deployed. In this case it is a bellows 22 mounted around the door 21. This bellows 22 is in the folded state in FIG. 1, because the loader is, in this figure, opposite a door sealed outlet 23 of the oven 20. As can be seen in this FIG. 1, a bellows 24, identical to the bellows 22, is also mounted around the door 23 and is shown in the deployed state.
• inflatable elements can be used in place of the bellows 22 and 24.
• These sealing connection establishment means can also be mounted, if desired, on the charger 41. As required, during the transfer of a carriage 12 from the loader
• the interface between the charger 41 and the furnace 20 may be subjected to a sweep of inert gas during the duration of the transfer.
• Sensors such as force sensors making it possible to ensure that the doors 21 and 23 are properly pressed against the respective frames, are also provided to prevent any opening of the doors 21 and 23, as long as a tight connection is not established between the charger 41 and the oven 20.
• the bellows 22 is therefore deployed and is applied against the charger 41 to obtain a sealed connection, which is then placed under an inert atmosphere. Then, the doors 21 and 43 are opened and the carriage 12 loaded with waste to be treated is introduced into the oven 20.
• the doors 21 and 23 are also watertight doors, such as for example doors actuated by jacks and movable transversely in watertight housings (registers). These doors can be moved horizontally or vertically.
• thermolysis oven between the entry door 21 and the exit door 23.
• the drive of the carriages 12 is here a drive by push chain or ratchet system. These trolleys are guided by rollers and handling rollers.
• thermolytic treatment itself, reference is made to the aforementioned international patent application WO-98 / 16,594 for more details.
• thermolysis furnace 20 comprises a supply line (not visible in FIG. 1) with hot gaseous fluid, opening into the furnace 20, a line of extraction (not visible in FIG. 1) of the gases from the thermolysis furnace and fluid connection means (not visible in FIG. 1) to establish a temporary fluid connection between the supply line and a connection zone provided on the carriage 12 and communicating with a zone for receiving the waste of this carriage 12. It is thus possible to inject the hot gaseous fluid directly into the charge to perform thermolysis.
• a boiler (not shown in Figure 1) is fluidly connected to the extraction line and adapted to burn at least part of the gases from the thermolysis furnace and a means of recycling (not shown in Figure 1) the gases from combustion of the boiler is expected to produce the hot gaseous fluid.
• This hot gaseous fluid can comprise: (i) thermolysis gases formed in the thermolysis furnace 20 and extracted beforehand therefrom by the extraction line, (ii) combustion gases from the boiler, or alternatively (iii ) thermolysis gases from treatment of thermolysis gases formed in the furnace 20 and previously extracted by the extraction line.
• the installation may include, a heat exchanger disposed downstream of the extraction line, in which the gases extracted from the thermolysis chamber are passed through as the extraction line, as hot fluid, a fractionation train arranged downstream of the heat exchanger in which the cooled gases are passed through the heat exchanger to obtain separate fractions containing, respectively, heavy hydrocarbons, light hydrocarbons, water and uncondensed gases at low temperature, a recycling line connected to the heat exchanger, downstream of the fractionation train, so as to bring a portion of the uncondensed gases at low temperature into the heat exchanger, as cold fluid, to raise the temperature, this recycling line being connected to the supply line and passing through the boiler to heat the gases circulating in this recycling line by combusti there is another part of the uncondensed gases at low temperature in the boiler.
• the carriage comprises a tank with a grid or nozzles (not visible in FIG. 1) opening out from the bottom of the tank and fluidly connected by a tubular system or distributor to the aforementioned connection area.
• the above-mentioned fluid connection means (not shown in FIG. 1) comprise a mobile telescopic device between a position for fluid connection to the connection area of a pipe surmounted by a bellows and the other end of which is connected to the line supply and a position away from the carriage 12.
• the hot gaseous fluid is injected at a temperature of the order of
• thermolysis oven 650 ° C in the thermolysis oven which is maintained at a constant pressure between 100 mbar and 1200 mbar absolute, depending on the product to be treated.
• the waste is first of all dehydrated, then brought to their thermolysis temperature as the carriage 12 advances in the thermolysis oven 20.
• the carriage 12 After treatment, the carriage 12 is recovered by the charger 41 at the location of the exit door 23.
• the bellows 24 is deployed during the transfer, to establish a sealed connection between the door 23 and the charger 41.
• this inert atmosphere is, during the transfer, composed of a mixture of thermolysis gas and nitrogen.
• the charger 41 forms an airlock isolating the thermolysis oven 20 from the external environment when a carriage 12 loaded with residues is extracted therefrom.
• the doors 23 and 43 are closed.
• the loader 41 then brings the trolley 12 loaded with residues to the cooling unit 30.
• the residues are poured there into a swimming pool from where they are then extracted, then sorted for recycling.
• the carriage 12 which is there is cooled using a cold gaseous fluid, water or nitrogen.
• the access door 31 of the cooling unit 30 is also a sealed door of the aforementioned type, around which is mounted a bellows 32 to establish a sealed connection with the charger 41 during the transfer of a carriage between the latter and the cooling unit 30. This makes it possible to maintain the same atmosphere between the charger 41 and the cooling unit 30 and to avoid the outflow of stale gases in the workshop environment.
• FIG. 2 represents an embodiment in which elements similar to those of FIG. 1 are designated by the same reference numerals.
• Each of these cells 14, 14 ' is equipped with an entry door 15, 15', through which the trolley 12 loaded with waste enters and an exit door 16, 16 ', from which the loader 41 comes recover a cart 12 loaded with waste.
• evacuation and an inert atmosphere can be carried out within these cells 14, 14 ', in which case, cells 14, 14' must be equipped with watertight doors of the aforementioned type and 'a bellows to make a sealed connection with the charger 41, if the latter is not equipped.
• the structure and operation of this installation are substantially similar to those described in support of FIG. 1.
• FIG. 3 represents another variant embodiment of the installation in accordance with the present invention, where elements similar to those of FIG. 1 are designated by the same reference numerals.
• the main differences of this installation compared to that of Figure 1 are as follows:
• the installation comprises a plurality of independent chambers 20a - 20j, each forming a thermolysis oven for a single carriage 12 loaded with waste and each having a sealed access door 21a - 21d for passage of the carriage 12.
• these chambers 20a - 20j are grouped together to receive two carriages.
• the chambers can be grouped together to receive three trolleys, for example, or be independent (reception of one trolley per independent chamber).
• the chambers 20a - 20j are served by two chargers 41, 41 ', which are equipped with two bellows 44, 44' identical to the bellows 22 and 24 mounted on the doors 21 and 23 of the installation of FIG. 1.
• These chargers 41, 41 ′ recover the carriages 12 between the chambers 20b and 20i.
• the loading unit 10 has two tracks 17, 18 on which carriages 12 can be placed awaiting loading near the hopper 11. Handling rollers, of the type mentioned above in connection with the installation of the figure 1, are also visible in this figure 3. Only two of them carry a numerical reference, namely reference 25.
• ovens comprising several queues of circulation of carriages 12 loaded with waste.
• the chambers can be equipped with a front door and a sealed rear door if it is desired, for example, to implement another circulation scheme.
• the chambers 20i and 20j could, for example, be used for cooling carriages 12 loaded with residues using a cold gaseous fluid, before their transfer to the cooling unit 30 by immersion of the residues in a swimming pool. In this case, these chambers 20i and 20j are obviously no longer used for thermolysis.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Processing Of Solid Wastes (AREA)
• Gasification And Melting Of Waste (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=9540926

Family Applications (1)

Country Status (8)

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Family Cites Families (4)

• 1999
  • 1999-02-25 AU AU22523/00A patent/AU2252300A/en not_active Abandoned
  • 1999-02-25 WO PCT/FR1999/000429 patent/WO2000050536A1/fr not_active Application Discontinuation
  • 1999-02-25 CN CN99805461A patent/CN1298436A/zh active Pending
  • 1999-02-25 CA CA002326234A patent/CA2326234A1/fr active Pending
  • 1999-02-25 EP EP99906303A patent/EP1078024A1/de not_active Withdrawn
  • 1999-02-25 KR KR1020007011807A patent/KR20010042975A/ko not_active Application Discontinuation
  • 1999-02-25 BR BR9909884-9A patent/BR9909884A/pt not_active Application Discontinuation
  • 1999-02-25 JP JP2000601101A patent/JP2002542133A/ja active Pending

Non-Patent Citations (1)

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