# US 7,465,843 B2 · Recycling system for a waste processing plant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,465,843 B2 - Document ID: US7465843B2 - Status: Granted - Kind: B2 - Application number: 10/504,862 - Filed: 2003-02-16 - Published: 2005-08-04 - Granted: 2008-12-16 - Earliest claimed: 2002-02-18 - Assignees: E.E.R. Environmental Energy Resources (Israe) Ltd. - Inventors: Valeri G Gnedenko; Alexander Suris; David Pegaz - Web page: https://patentgrep.com/patent/US7465843B2 ## CPC - F23J 1/08: Liquid slag removal - F23G 5/006: {General arrangement of incineration plant, e.g. flow sheets} - F23G 5/027: pyrolising or gasifying stage (pyrolisation of sludge C02F11/00; destructive distillation of carbonaceous materials C10B53/00) - F23G 5/085: {High-temperature heating means, e.g. plasma, for partly melting the waste} - F23G 5/16: in a separate combustion chamber - F23J 15/003: {for supplying chemicals to fumes, e.g. using injection devices} - F23J 15/006: {Layout of treatment plant} - F23G 2201/702: with other waste - F23G 2202/104: with ash melting stage - F23G 2202/106: with recirculation of unburned solid or gaseous matter into combustion chamber - F23G 2206/203: with a power/heat generating installation - F23G 2209/30: Solid combustion residues, e.g. bottom or flyash - Y02E 20/12: Heat utilisation in combustion or incineration of waste - F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06) - F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A recycling system for a waste converting apparatus collects residues from a post-processing means and re-introduces the residues into the apparatus such that the residues are exposed to the high temperature zone thereof. ## Claims ### Claim 1 A residues recycling system for recycling at least part of the residues formed in a waste processing plant, said waste processing plant having: at least one waste processing chamber adapted for accommodating a column of waste and for enabling said waste to migrate through the chamber in a downstream direction, said chamber having at least one upstream gas outlet means and further having high temperature generating means adapted for providing a high temperature melting zone in a downstream part of said chamber and a relatively cooler upstream gasification zone, wherein said melting zone is at conditions at least sufficient for enabling substantially all inorganic waste therein to be melted into at least one of melted metals and slag, and wherein said upstream gasification zone is at conditions sufficient for enabling gasification of organic waste in said column of waste; at least one post processing means operatively connected to said at least one waste processing chamber, wherein said post-processing means are adapted for enabling said residues to be collected therefrom during operation of said at least one waste processing chamber; wherein said residues recycling system is characterized in being adapted for introducing at least a portion of said residues into the lower part of said processing chamber such that during operation of said system said portion of said residues is directly exposed to said high temperature melting zone provided by said high temperature generating means. ### Claim 2 (depends on 1) A residues recycling system as claimed in claim 1, wherein said recycling system comprises at least one collection reservoir operatively connected to said post processing means and adapted for collecting at least part of the residues therefrom. ### Claim 3 (depends on 1) A residues recycling system as claimed in claim 1, wherein said residues comprise at least two types of residues, including residues 1 and residues 2 which differ one from the other in at least their chemical properties, that are separately collectible from said post processing means, and said system comprises at least one said collection reservoir for separately collecting one or another of said residues 1 and residues 2. ### Claim 4 (depends on 2) A residues recycling system as claimed in claim 2, wherein said recycling system comprises suitable conduit means for providing communication between said at least one collection reservoir and said lower part of said at least one processing chamber, said conduit means adapted for transporting said residues from said at least one collection reservoir to said lower part of said at least one processing chamber for direct exposure of said residues to said hot zone during operation of said system. ### Claim 5 (depends on 4) A residues recycling system as claimed in claim 4, wherein said system further comprises suitable transport means operatively connected to said at least one collection reservoir for assisting transportation of said residues through said conduit means. ### Claim 6 (depends on 5) A residues recycling system as claimed in claim 5, wherein said transport means comprises a suitable fluid medium for transporting the said residues. ### Claim 7 (depends on 4) A residues recycling system as claimed in claim 4, wherein said system further comprises suitable mechanical transport means operatively connected to said at least one collection reservoir for assisting transportation of said residues through said conduit means. ### Claim 8 (depends on 7) A residues recycling system as claimed in claim 7, wherein said transport means comprises a suitable pump for transporting the said residues. ### Claim 9 (depends on 4) A residues recycling system as claimed in claim 4, wherein said conduit means comprises at least one suitable outlet operatively connected to said lower part of said processing chamber. ### Claim 10 (depends on 3) A residues recycling system as claimed in claim 3, wherein said conduit means comprises at least one suitable valve operable to enable the flow of at least a portion of said residues through said conduit means to be selectively prevented or allowed. ### Claim 11 (depends on 10) A residues recycling system as claimed in claim 10, wherein said valve is operatively connected to a suitable control system. ### Claim 12 (depends on 11) A residues recycling system as claimed in claim 11, wherein said control system is further operatively connected to at least one suitable sensor comprised in said post processing means and adapted for controlling the operation of said valve according to predetermined conditions sensed by said sensor. ### Claim 13 (depends on 1) A residues recycling system as claimed in claim 1, wherein said recycling system comprises a source of suitable additives and a suitable mixer for mixing at least a portion of said residues with said additives, said additives adapted for at least partially encapsulating said portion of residues in a matrix that is thermally and mechanically stable at temperatures substantially similar to the temperature of the gasification zone of said processing chamber, first granulating means for granulating said matrix into residue granules, and means for transporting said residue granules to a suitable inlet comprised in a part of said at least one processing chamber that is cooler than the melting zone thereof. ### Claim 14 (depends on 13) A residues recycling system as claimed in claim 13, wherein said additives may be chosen from any one or combination of cement, sodium silicate, organic compounds including thermoplastics, and inorganic compounds and/or complexes including oxide powders, oxide solutions, salt powders and salt solutions. ### Claim 15 (depends on 13) A residues recycling system as claimed in claim 13, wherein said inlet is a waste inlet for enabling waste to be input into said at least one processing chamber. ### Claim 16 (depends on 13) A residues recycling system as claimed in claim 13, wherein said additives comprise at least part of said slag, and further comprising means for introducing at least part of said slag into said mixer. ### Claim 17 (depends on 16) A residues recycling system as claimed in claim 16, further comprising suitable transport means for transporting slag produced by said at least one processing chamber to said mixer. ### Claim 18 (depends on 13) A residues recycling system as claimed in claim 13, wherein said system further comprises suitable transport means operatively connected to said at least one collection reservoir for assisting transportation of said residues. ### Claim 19 (depends on 18) A residues recycling system as claimed in claim 18, wherein said transport means comprises a suitable fluid medium for transporting the said residues at least to said mixer. ### Claim 20 (depends on 13) A residues recycling system as claimed in claim 13, wherein said system further comprises suitable mechanical transport means operatively connected to said at least one collection reservoir for assisting transportation of said residues at least to said mixer. ### Claim 21 (depends on 20) A residues recycling system as claimed in claim 20, wherein said transport means comprises a suitable pump for transporting the said residues. ### Claim 22 (depends on 13) A residues recycling system as claimed in claim 13, further comprising at least one suitable valve operable to enable the flow of at least a portion of said residues to said mixer to be selectively prevented or allowed. ### Claim 23 (depends on 22) A residues recycling system as claimed in claim 22, wherein said valve is operatively connected to a suitable control system. ### Claim 24 (depends on 23) A residues recycling system as claimed in claim 23, wherein said control system is further operatively connected to at least one suitable sensor comprised in said post processing means and adapted for controlling the operation of said valve according to predetermined conditions sensed by said sensor. ### Claim 25 (depends on 13) A residues recycling system as claimed in claim 13, wherein the volume (Vg) and external surface area (Fg) of at least a portion of said residue granules are chosen such that: Vg/Fg ≧0.00002*H wherein H is a predetermined linear distance that is correlated to the travel distance of the residue granules from the upper part of the processing chamber to the lower part thereof. ### Claim 26 (depends on 25) A residues recycling system as claimed in claim 25, wherein H comprises the height of the said processing chamber taken from the center of the said gas outlet to the centre of a slag outlet port comprised in said lower part and adapted for enabling the molten slag to exit the said processing chamber. ### Claim 27 (depends on 25) A residues recycling system as claimed in claim 25, wherein H comprises the vertical distance taken from the center of the said gas outlet to a nominal level of the surface of the molten slag at the said lower part of the said chamber ### Claim 28 (depends on 25) A residues recycling system as claimed in claim 25, wherein H comprises the vertical distance taken from the center of the said gas outlet to said high temperature zone of said lower part of said processing chamber. ### Claim 29 (depends on 25) A residues recycling system as claimed in claim 25, wherein said processing chamber comprises at least one plasma torch means and H comprises the vertical distance taken from the center of the said gas outlet to the center of the output end of said at least one plasma torches means. ### Claim 30 (depends on 1) A residues recycling system as claimed in claim 1, wherein said high temperature generating means comprises at least one plasma torch means comprising an output end extending into a downstream part of said waste processing chamber said at least one plasma torch means adapted for providing a high temperature melting zone in a downstream part of said chamber at least sufficient for enabling substantially all inorganic waste accommodated therein to be melted. ### Claim 31 (depends on 1) A residues recycling system as claimed in claim 1, further comprising a slag recycling system for at least part of the slag formed in a waste processing plant and subsequently cooled and solidified after extraction therefrom, wherein said slag recycling system comprises a suitable converting means for converting at least part of said solidified slag into slag particles, and means for transporting at least a part of said slag particles to a suitable inlet comprised in the cooler part of said at least one processing chamber. ### Claim 32 (depends on 31) A residues recycling system as claimed in claim 31, wherein said inlet is a waste inlet for enabling waste to be input into said at least one processing chamber. ### Claim 33 (depends on 31) A residues recycling system as claimed in claim 31, further comprising means for introducing suitable additives into said converting means. ### Claim 34 (depends on 31) A residues recycling system as claimed in claim 31, wherein the volume (Vr) and surface area (Fr) of at least a portion of said slag particles are chosen such that: Vr/Fr