Abstract:
A method for pyrogasification of organic wastes that employs a vertical furnace filled with metal masses in the shape of metal toroids previously raised to a high temperature (500 to 1100° C.) and organic materials to be pyrolyzed. It also employs a furnace for heating toroids transported by an Archimedes screw driven by a gear motor, as well as a separator for recovering the mineral residues, whereby separation between the toroids and residues is effected with the aid of a screen and an Archimedes screw driven by a gear motor.
Abstract:
In a method for treating alternative, carbon-containing, low-caloric waste materials for use in furnace systems, in particular rotary tubular kilns for the production of clinker, the carbon-containing, alternative fuels are subjected to high-temperature gasification under anoxic conditions at temperatures above 1000° C., wherein water, water vapor or CO2 is injected to ensure a reaction forming CO and H2. The waste heat from a clinker cooler is used for the high-temperature gasification.
Abstract:
A multi-step process is provided in which waste material is processed in two or more steps. Specifically, an earlier step of the process heats the waste material at a first temperature. This results in a release of vapors for materials having a boiling point that is lower than the first temperature. A subsequent step of the process heats some or all of the remaining waste material at a second temperature, which is preferably higher than the first temperature. The subsequent heating results in a release of additional vapors for those materials having a boiling point that is lower than the second temperature. A system configured to carry out the process is also disclosed.
Abstract:
A high temperature air heater including a heat transfer conduit located in higher temperature gas. The heat transfer conduit is made up of a heat transfer pipe through which the air to be heated flows and a refractory protective pipe covering the heat transfer pipe. A clearance is provided between the heat transfer pipe and the refractory protective pipe. The clearance makes it possible to accommodate the differences in thermal expansion between the heat transfer pipe and the refractory protective pipe to prevent damaging the refractory protective pipe, thus extending the service life of the high temperature air heater.
Abstract:
In an air heater for use in recovering, by heat exchange, the heat of an exhaust gas generated from an incinerator for disposing of wastes, prolonged service life and improved working efficiency are attainable with least thermal deformation. The air heater has a heat transfer conduit which is placed in high temperature highly corrosive gas. The transfer conduit comprises a short seal pipe (212) going through a ceiling of said air heater and fixed at the ceiling, a metal ring member (214) arranged outside of the shot seal pipe through a sealing material and arranged to be able to move along a longitudinal axis of said shot seal pipe, a heat transfer pipe (216) formed of a refractory material having a heat conductivity, connected to said metal ring member at a top end portion and sealed at a lower end portion, and a metallic pipe (218) arranged inside of said short seal pipe and said heat transfer pipe in coaxial, providing a through hole at a lower part thereof and providing a metallic support fitting welded at the bottom thereof. The short seal pipe is connected to an inlet pipe of an air to be heated and supported by a structural member of the air heater at a top end thereof. The metallic pipe is connected to an outlet pipe of a heated air and supported by a structural member of the air heater at a top end thereof. The heat transfer pipe is supported by the metallic support fitting by means of being set into a hollow part formed on an inner surface of the heat transfer pipe.
Abstract:
In an apparatus for heating high-temperature air for use in recovering, by heat exchange, the heat of an exhaust gas of elevated temperature generated from an apparatus for disposing of wastes, prolonged service life, improved working efficiency, improved efficiency of heat recovery on heat exchange are attainable with least thermal deformation and reduced dust deposition. Solving Means In the apparatus for heating high-temperature air located in a gas atmosphere of elevated temperature, an air to be heated and caused to flow through a heat transfer conduit is heated upon heat exchange with the gas of elevated temperature. The heat transfer coduit is constructed with a heat transfer pipe in which the air to be heated is flowed, and a refractory protective pipe held in coaxially covered relation to the heat transfer pipe with a gapping defined between both pipes. The refractory protective pipe is formed to be angular when seen sectionally, and the heat transfer pipe is disposed in a plural number and secured in face-to-face contact with adjoining heat transfer pipes and one sectionally angular face of the refractory protective pipe.
Abstract:
The invention concerns a plant for the thermolysis of waste products containing an organic fraction, and for simultaneous energetically upgrading these waste products comprising: a unit for loading and supplying the waste products to be treated; a thermolysis reactor for thermal dissociation under reduced pressure at high temperature. The invention is characterized in that it comprises: upstream and downstream of the reactor, a lock chamber for maintaining a partial vacuum in the reactor for ensuring thermolysis in an atmosphere with low oxygen content; first means for recuperating, in the upper part of the reactor, the organic gas fraction formed during thermolysis, and for bringing this fraction to a combustion chamber supplying a steam generator; second means for recuperating at the bottom of the reactor the solid carbon products formed during thermolysis, and for bringing these solid products to a combustion chamber supplying a steam generator or an evacuating system. The gas of the combustion chamber and the steam produced by the steam generator, in turn supply the unit producing the waste products and/or means for drying in advance of the waste products provided just upstream of the reactor.
Abstract:
The present invention refers to a method and an equipment for pyrolytic treatment of organic material comprising a supply storage receiving the organic material to be treated, a number of containers with meshlike walls, each to be charged with a batch of said organic material, a horizontal reactor with a charge gate in one end and a discharge gate in the opposite end, the interior of the reactor being divided by means of internal gates into at least a heating chamber, a pyrolysis chamber, and a cooling chamber, as well as a recovery storage for a solid pyrolytic residue of the organic material, i.e. the pyrolytic coke, the pyrolysis chamber being provided with an outlet pipe for generated pyrolytic gas terminating in a fractionating condenser, said condenser being provided with an outlet for each liquid fraction and an outlet pipe for uncondensed pure pyrolytic gas, which outlet pipe terminates in a gas tank.
Abstract:
A combustion plant for a combustion process is disclosed. The plant has a pressurized combustion chamber (1), which encloses a fluidized bed and in which combustion of a fuel is to take place while producing combination gases, a gasifying device (40), which is arranged to produce a combustible gas and a degassed combustible product, and a transportation device (6, 44) for discharging the product from the gasifying device (40) and supplying it to the combustion chamber (1) for combustion of the product in the combustion chamber. The transportation device has a discharge conduit (44) connected to the gasifying device (40) and is arranged to discharge the product from the gasifying device (40). The discharge conduit (44) has a cooling member (45), which is arranged to cool the product discharged from the gasifying device (40), and a pneumatic supply conduit device. The pneumatic supply conduit device (6) is arranged downstream of the cooling member (45) to connect the discharge conduit (44) to the combustion chamber (1) and supply the product to the combustion chamber using a pressurized gas. The pressurized gas contains oxygen supplied directly to the supply conduit device (6) by a compressor (16, 51).
Abstract:
The present invention relates to a process and system for thermal waste treatment. The method according to the invention comprises subjecting the waste to thermolysis in a furnace to produce from the waste thermolysis gases and carbon containing solids; purifying the carbon containing solids into purified carbon containing solids which contain pollutants; using part of the thermolysis gases as fuel which is burned to heat the waste in the furnace; burning in a cyclone furnace at least part of the purified carbon containing solids containing pollutants to produce hot gases and to immobilize the pollutants present in the purified carbon containing solids into solids containing the pollutants; and providing the hot gases to an energy recovery device and using the energy recovery device to recover energy from the hot gases.