Abstract:
A unique waste processing method provides a simple solution to complex mix of waste streams using a molten sodium/potassium bath to thermalize waste. The process offers sterilization, volumetric reduction, energy or oil recovery, and complete molecular fragmentation of hazardous chemicals.
Abstract:
Methods and systems for measuring and controlling the percent stoichiometric oxidant in the pyrolyzing section of incinerators are provided. The methods and systems rely on measurements of the oxygen concentration and temperature of the gases within the pyrolysis section and mathematical relationships between these values and the percent stoichiometric oxidant.
Abstract:
A gasification system has a gasification furnace (1) for gasifying wastes to produce a combustible gas and a combustion furnace (2) for combusting char and/or tar produced by gasification in the gasification furnace (1). The gasification system also has a return line for returning a combustion gas discharged from the combustion furnace (2) to the gasification furnace (1) and the combustion furnace (2).
Abstract:
An apparatus for gasifying solid organic fuel includes a refractory-lined oxidation chamber, fuel storage, a transfer connecting the fuel storage with an inlet into the oxidation chamber for transferring in an upwardly inclined direction the solid fuel from the fuel storage into the inlet to form an upwardly mounded fuel bed. An oxidant is supplied into the fuel bed to gasify the organic materials in the fuel to produce a gaseous effluent from the fuel bed, thereby leaving a residue of the fuel. The residue drops through an opening under the oxidation chamber onto a residue removal transfer. The oxidant is supplied through a plurality of perforated air distribution members extending across the fuel bed cavity in the oxidation chamber so as to introduce air into the interior of the fuel bed to thereby promote evenly distributed gasification, evenly distributed through the fuel bed.
Abstract:
A system for treating a treatable material containing a noxious component, which comprises a mixer for mixing a treatment agent containing alkali material with the treatable material to form a mixture, at least one first heat treating furnace for producing a low oxygen concentration atmosphere, a first heating device located outside the first furnace to heat it at a first temperature at which the treatable material is decomposed to generate a substance containing the noxious component, at least one separate second heat treating furnace, and a second heating device located outside the second furnace for heating the treatable material residue at a second temperature at which carbonization of the treatable material residue takes place.
Abstract:
A solid fuel fed combustor method having a first chamber portion with an inlet feeding a metered amount of a solid fuel to a first burner stage having a first traveling conveyor firebelt. A metered amount of air is introduced in progressively increasing proportions along the length thereof to cause endothermic reduction of the solid fuel. The first stage feeds a second burner stage having a second traveling conveyor firebelt. Air is introduced in a progressively decreasing amount along the length of the second traveling conveyor firebelt to induce exothermic combustion and decomposition of fuel. The amount of air introduced and speed of the conveyors are controlled to minimize the quantity of carbon monoxide and nitrogen oxides and other pollutants. Radiative energy generated from fuel traveling on the traveling conveyor firebelts is reflected on fuel traveling on the first firebelt.
Abstract:
The present invention provides a fuel gasification furnace including a gasification chamber (1) for fluidizing a high-temperature fluidizing medium therein to form a gasification chamber fluidized bed having an interface, and for gasifying a fuel in the gasification chamber fluidized bed, a char combustion chamber (2) for fluidizing a high-temperature fluidizing medium therein to form a char combustion chamber fluidized bed having an interface, and for combusting char generated by gasification in the gasification chamber (1) in the char combustion chamber fluidized bed to heat the fluidizing medium, and a first energy recovery device (109) for using gases generated by the gasification chamber (1) as a fuel. The gasification chamber (1) and the char combustion chamber (2) are integrated with each other. The gasification chamber (1) and the char combustion chamber (2) are divided from each other by a first partition wall (15) for preventing gases from flowing therebetween, and which extends vertically upward from the interfaces of the respective fluidized beds. The first partition wall (15) has a first opening (25) provided in a lower portion thereof, and the first opening (25) serves as a communication between the gasification chamber (1) and the char combustion chamber (2), for allowing the fluidizing medium heated in the char combustion chamber (2) to move from the char combustion chamber (2) via the first opening (25) into the gasification chamber (1).
Abstract:
The co-combustion process may comprise the following unit operations: routing of hot gas (10) generated in the clinker cooling process to a rotary kiln (1); use of part of the rotary kiln exhaust gas to dry solid wastes in rotary dryers; leading the gases from both the dryer and the combustion kiln to the secondary combustion chamber (2); use of additional fuel to boost up the secondary combustion chamber reaction temperature to as high as 1200° C.; primary dry gas scrubbing in a precalciner or precalciners (3, 3a); heat recovery (4) and power generation; secondary gas scrubbing (5) in a semi-dry scrubber, bag filtering after activated carbon injection and returning of all the collected ash and used carbon into the waste kiln and/or a cement kiln. Detrimental materials for cement processing generated by waste combustion can be by-passed to a scrubbing system and a cement kiln. Residue slag from waste kilns can be treated and reused.
Abstract:
A waste is dry-distilled in a gasification furnace and generated combustible gas is combusted in a combustion furnace. A temperature in the combustion furnace is set to be substantially constant at a first preset temperature or more. When the temperature in the combustion furnace is greater than the first preset temperature by combustion of other fuels, the combustible gas is introduced. When the temperature in the combustion furnace reaches a second preset temperature or more by the combustion of only the combustible gas, the combustion of the other fuels is finished. When the temperature in the combustion furnace falls below a third preset temperature the combustion of the other fuels is resumed. When the temperature in the gasification furnace falls below a fourth preset temperature, the combustion of the other fuels is finished.
Abstract:
A system and method for treating feedstocks containing solids, sludges or slurries that contain organics includes introducing the feedstock into a desorption chamber. In the desorption chamber, the temperature and pressure of the feedstock are elevated to volatilize a portion of the feedstock and thereby separate the feedstock into a volatile portion containing organics and a residue portion. Steam, water or oxidants can be injected into the desorption chamber to aid in the volatilization process. From the desorption chamber, the volatile portion of the feedstock is transferred to a reactor for hydrothermal treatment to oxidize or reform the organics in the volatile portion. In the hydrothermal reactor, the volatile portion may be reacted with excess oxidant and auxiliary fuel at a temperature between approximately 1000° F. and approximately 1800° F. and a pressure of between approximately 20 atmospheres and approximately 200 atmospheres.