Abstract:
A method for upgrading solid waste, especially household garbage, comprising at least 30 % cellulose matter. The method includes the preliminary steps of crushing and sorting the waste to remove metal elements. The method involves heat treating, in a tubular reaction vessel (13) provided with an Archimedean screw and heated by hot flue gases injected through its inlet, said reaction vessel containing a partial vacuum, mineral products and a mixture of a homogeneous mass containing the shredded waste. The mixture particularly contains quick lime, calcium carbonate and caustic soda. In the first part of the reaction vessel, the heat treatment and the addition of said minerals cause a rise in the temperature of the mixture and lead to the production of intense luminous radiation. A device for implementing the method is also disclosed.
Abstract:
A method to thermally convert alternative fuels within a loop seal reactor by utilizing pre-heated/calcined cement meal as the heat source within which alternative fuels are immersed, subjected to drying, pyrolysis and subsequently charred, and an apparatus utilized to practice such method.
Abstract:
Mineral additives and a method for operating a waste-to-energy furnace are provided in order to improve its operational performance and availability, increase the lifetime of the combustor building materials (refractory walls and heat-exchanger metallic tubes) and flue gas treatment equipment, improve ash quality, reduce emissions and avoid combustion problems such as agglomeration, slagging, deposition and corrosion. A method for operating a waste-to-energy furnace, such as a fluidized bed reactor, pulverized-fuel combustor, grate combustor includes introducing mineral additive into the furnace. The method further includes heating at least a portion of the mineral additive either intimately in contact with the fuel, such that the ability of mineral additive to induce crystallization of the surface of forming ashes is enhanced, or minimizing the contact of the mineral additive with the fuel and the forming ashes, such that the solid-gas reactions between the mineral additive and the volatile compounds in the flue gas are favored and the mineral additive power to capture at least a portion of the inorganic volatile compounds present in the furnace is enhanced.
Abstract:
A process for the remediation of contaminated particulate materials by the addition of an environmentally benign, carbonaceous fuel source in low concentration to enable or enhance smoldering combustion. The process may be applied to both in situ and ex situ treatments. In an ex situ smoldering process for the remediation of contaminated particulate materials in a continuous manner, contaminated feed is introduced near the top of a treatment unit and treated product emerges near the bottom. A smoldering front is maintained in the unit, fed by the fuel in the contaminated particulate material and a supply of combustion-supporting gas, such as air.
Abstract:
A method of creating and using a high-carbon spent pot lining (SPL) as a fuel, including delining the high-carbon spent pot lining from an electrolytic cell and combusting the SPL in a furnace.
Abstract:
Bei einem Verfahren zum Aufarbeiten von verbrauchtem kohlenstoffhaltigen Kathodenmaterial, insbesondere verbrauchten Kathodenwannen aus der Aluminiumproduktion, bei welchem das Kathodenmaterial einem Schachtofen aufgegeben und in dem Schachtofen zur Vergasung von Kohlenstoff einer thermischen Behandlung bei einer Temperatur oberhalb der Zündtemperatur des Kohlenstoffs und oberhalb der Verdampfungstemperatur von im verbrauchten Kathodenmaterial enthaltenen Giftstoffen unterzogen wird werden die Reaktionsgase in einem ersten Längsabschnitt des Schachtofens im Gleichstrom mit dem Kohlenstoff und in einem zweiten Längsabschnitt des Schachtofens im Gegenstrom zum Kohlenstoff geführt, wobei die Reaktionsgase aus einem Bereich des Schachtofens mit vergrößertem Querschnitt zwischen den genannten Längsabschnitten abgezogen und bevorzugt einer Nachbehandlung unterworfen werden.
Abstract:
A method and system for cost effectively converting a feedstock using thermal plasma, or other styles of gassifiers, into a feedwater energy transfer system. The feedstock can be any organic material, or fossil fuel. The energy transferred in the feedwater is converted into steam which is then injected into the low turbine of a combined cycle power plant. Heat is extracted from gas product issued by a gassifier and delivered to a power plant via its feedwater system. The gassifier is a plasma gassifier and the gas product is syngas. In a further embodiment, prior to performing the step of extracting heat energy, there is provided the further step of combusting the syngas in an afterburner. An air flow, and/or EGR flow is provided to the afterburner at a rate that is varied in response to an operating characteristic of the afterburner. The air flow to the afterburner is heated.
Abstract:
A method and system for cost effectively converting a feedstock using thermal plasma, or other styles of gassifiers, into a feedwater energy transfer system. The feedstock can be any organic material, or fossil fuel. The energy transferred in the feedwater is converted into steam which is then injected into the low turbine of a combined cycle power plant. Heat is extracted from gas product issued by a gassifier and delivered to a power plant via its feedwater system. The gassifier is a plasma gassifier and the gas product is syngas. In a further embodiment, prior to performing the step of extracting heat energy, there is provided the further step of combusting the syngas in an afterburner. An air flow, and/or EGR flow is provided to the afterburner at a rate that is varied in response to an operating characteristic of the afterburner. The air flow to the afterburner is heated.
Abstract:
A process for control melting a mixture of coal ash, electric arc furnace dust, recycled glass and additives to create a feedstock. The feedstock is quenched or air dried in a mold to create useful products, such as fracking compounds, abrasives, construction products, building materials, landscaping materials, and the like.
Abstract:
A process for control melting a mixture of coal ash, electric arc furnace dust, recycled glass and additives to create a feedstock. The feedstock is quenched or air dried in a mold to create useful products, such as fracking compounds, abrasives, construction products, building materials, landscaping materials, and the like.