Abstract:
The invention concerns a pyrolytic oven comprising an airtight cavity (50), including an inlet interface for inserting waste in said cavity (50) and an outlet (54) for the gas stream resulting from pyrolysis. A combustion chamber (60) encloses the cavity (50), and a burner (80) has an inlet (84) connected to the cavity outlet (24) and an outlet (86) delivering a fuel gas into the combustion chamber (60). The cavity gas stream outlet (54) comprises at least a discharge duct (GA) comprising one first end connected to the cavity and a second end connected to the burner (80), the duct (GA) being capable of housing a coreless screw (117) for capturing at least part of the solid carbon-containing particles present in the gas stream resulting from pyrolysis and for rotating, under control, so as to send back into the oven cavity the captured particles.
Abstract:
A low-pollutant system (10) for waste materials treatment includes a process chamber (11) for converting organic components of the waste materials into a flammable gas and a two-stage vortex burning chamber (12) for complete combustion of the flammable gas. The vortex burning chamber (12) includes a first substantially-horizontal combustion chamber (35) and a second substantially-vertical combustion chamber (36) disposed at a right angle to each other and communicating therebetween. The first combustion chamber (35) has an inlet portion (39) for receiving the flammable combustion gas from the gas generator means (11) and an injection pipe (41) for injecting primary air into the first combustion chamber (35), thereby forming a mixture of air and the flammable gas and igniting the mixture for partial oxidation thereof. The first combustion chamber (35) has a converging distal portion (43) for discharging the partially-oxidized mixture tangentially into the second combustion chamber (36), where the gas is mixed with the secondary air which is injected tangentially into the second combustion chamber (36).
Abstract in simplified Chinese:本发明系关于一种处理家庭废物之方法,其中之物质被热分解,热分解之气体经过除尘,部分已被除尘之热分解气体经燃烧后,剩余部分则被导入熔化炉,经过燃烧所产生之热气则用于加热热分解气体,加热热分解反应器所产生之排气及热分解焦炭被送入熔化过程。本发明进一步有关一种处理家庭废物之设备,包括热分解反应器、除尘器、燃烧室、热分解焦碳冷却器、金属分离器、搅碎器、熔化炉、后燃烧室、热利用及烟道气体清净器。
Abstract in simplified Chinese:废物热处理设备,包括:一碳化反应器(2),其排放碳化气及碳化残渣;及一燃烧室(8),碳化气送入其内以燃烧。提供将由残渣分离设备(20)所分离出的较细碳化残渣送入燃烧室(8)中燃烧。尘状废物及/或液态废物可被直接送入燃烧室(8)中。附可之燃料亦可送入。燃烧室(8)设有出渣口(35),熔渣可由其排出。冷却后,例如在水溶中,熔渣变成玻璃状。烟道气经烟道气导管(10)而排放。本发明适于处任何型态之废物。
Abstract in simplified Chinese:本发明系揭示一种处理来自废弃物焚化厂之残余物质以及经活化煤焦及/或活化碳之方法,基于此目的,残余物质以及经活化煤焦及/或活化碳系送入熔炉(1)主燃室(2)之环形轴(3),主燃室(2)内之温度设置在1250至1500℃;熔融物质随着烟气经过中央出口(4)而离开主燃室(2),熔融物质通过次燃室(5)且以熔渣形式排出。本发明另揭示一种用于此过程之设备,其中熔炉(1)之主燃室(2)炉顶(10)处设有一或多具燃烧器(7),而二次空气系在炉顶(10)之一或多点(22)处导入主燃室(2),且三次空气在炉顶(10)之一或多点(23)处导入主燃室(2)。
Abstract:
The essential and innovative characters of the proposed solution consists in: 1. the use of a pyrolyser and a gasifying device in series and in a loop; 2. the two most harmful products for the environment, namely tar (condensable tar) and char (a sort of carbon) are gasified with priority. Char, before gasifying, will be subjected to particular mechanical, chemical and electrical washing processes, that separate and stabilise part of the most polluting substances, among which heavy metals (iron, steel, aluminium, copper, etc.) so that the proposed system is, for all purposes, also a method for recovering metals from wastes; 3. there are no polluting emissions into the environment; in fact, wastes, air and possibly water, together with some additives and an auxiliary fuel, when entering the system are completely converted into a "clean" gaseous fuel and into an inert material that will contain, suitably stabilised, the most harmful substances for the environment and possible metals contained in the wastes.
Abstract:
The invention relates to a pyrolysing device for pyrolysing solid granular material. The device comprises an oven with a pyrolysis chamber (1) with an inner chamber for heating and pyrolysing the material to be pyrolysed. The pyrolysis chamber (1) comprises an inlet (10) for supplying the material to be pyrolysed, an outlet (11) for discharging remainders of the pyrolysed material and an exhaust (13) for discharging gasses from the pyrolysis. The device comprises at least one transport belt (5) for moving the material to be pyrolysed in longitudinal direction through the pyrolysis chamber (1) from the inlet (10) to the outlet (11), a driving unit (25) for driving the displacement of the transport belt in longitudinal direction of the pyrolysis chamber (1). The pyrolysis chamber comprises a floor (18) with a floor surface facing the inner chamber. The floor surface is arranged to receive the material to be pyrolysed. The transport belt (5) comprises an endless conveyor belt provided with holes and is spaced from the floor surface in height direction of the pyrolysis chamber and positioned at such a distance from the floor surface (18) that the conveyor belt contacts at least part of the material and entrains the material while the conveyor belt is displaced over the floor (18) from the inlet (10) towards the outlet (11).
Abstract:
A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, prferably 4,4'-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction. In a preferred embodiment, the polymer composition further incorporates radioactive waste, namely depleted uranium oxide, and can be used in conjunction with specially designed containers for storing radioactive material. The resulting polymer/waste composition cures at room temperature and does not deteriorate or suffer structural damage when exposed to higher levels of gamma radiation, nor do the mechanical or chemical properties undergo any detectable change. The composition is resistant to biodegradation and combustion, and does not creep or shrink during thermal cycling.