A comprehensive utilization system for high-temperature gasification and low-nitrogen combustion of biomass comprises a gasifier, a boiler and a burner installed on the boiler. The outlet of the gasifier is connected to a fuel inlet of the burner. The boiler is provided with flue-gas exhaust ports connected to a chimney. Regenerative heat exchangers are provided between the flue-gas exhaust ports and the chimney, preheating air pipes are connected to the regenerative heat exchangers and then to an auxiliary mixing chamber. The auxiliary mixing chamber is provided with a first outlet connected to the inlet of the mixer, and a second outlet connected to the high-temperature air inlet of the gasifier and the second combustion-air inlet of the burner. An outlet of the mixer is connected with the first combustion-air inlet of the burner. The chimney is connected with the flue gas inlet of the gasifier through pipes and fans.

To preheat combustion air with gasification furnace flue gas, combustion air is flowed towards an inlet of a gasification furnace. The combustion air is heated using flue gas emitted from the gasification furnace. The flue gas is generated within the gasification furnace responsive to a gasification process. The heated combustion air is flowed into the inlet of the gasification furnace. The gasification process is implemented within the gasification furnace using the heated combustion air

A thermochemical system & method may be configured to convert an organic feedstock to various products. A thermochemical system may include a solid material feed module, a reactor module, an afterburner module, and a solid product finishing module. The various operational parameters (temperature, pressure, etc.) of the various modules may vary depending on the desired products. The product streams may be gaseous, vaporous, liquid, and/or solid.

A biochar kiln is disclosed. An example of the biochar kiln includes a kiln body having a sidewall, a floor attached to the sidewall, and a removable lid. The example biochar kiln also includes a plurality of semi-independent combustion cells. The example biochar kiln also includes an outside vent pipe loading to a center of the semi-independent combustion cells to provide combustion air.

The present invention relates to a sealed plasma melting furnace for treating low- and intermediate-level radioactive waste, which allows the secondary pollutants to be minimized. The sealed plasma melting furnace includes: a waste supply chamber communicatively provided with a hopper; a pyrolysis chamber channel communicatively coupled with the waste supply chamber; a pyrolysis chamber having a burner mounted thereon; a melting chamber channel guiding the waste transferred from the pyrolysis chamber communicatively provided therewith to fall down; a melting chamber provided with a furnace interior portion accommodating a molten substance on a bottom surface thereof; a processed molten substance discharge channel discharging the processed molten substance generated in the melting chamber; a secondary combustion chamber channel inducing and exhausting an off-gas flow generated in the melting chamber; and a secondary combustion chamber inducing complete combustion of the off-gas input from the secondary combustion chamber channel.

Systems and methods for processing a waste stream for feeding into a thermal unit performing an airless or oxygen starved incineration process like pyrolysis. Embodiments comprise an inlet hopper for receiving a waste stream, an inlet hopper lid, a slide gate that when closed forms the base of the inlet hopper and when open allows the waste stream to pass into an intermediate hopper, a ram body that when closed forms the base of the intermediate hopper and when open allows the waste stream to pass into a ram cylinder, a crusher plate on the front face of the ram body, a ram for driving the ram body and its crusher plate forward into the waste within the cylinder, a compactor cone comprising teeth for splitting, and an outlet through which the crushed and split waste stream exits the system into a thermal unit.

Scrap vehicles, mixtures of iron and aluminum, plastics are often pressed into bales or cubes to reduce the cost of transportation and storage to a smelter. Considering the dwindling number of large smelters in the United States due to the high pollution associated with coke fired cupolas, a new invention is developed to use natural gas, diesel fuels and clean fuels and hydrocarbons from scrap plastics in the bale. The process consists of three steps. In the first step the scrap bale is heated in a chamber up to temperatures of 1000 C. to promote the vaporization of zinc from galvanized steel, the pyrolysis of any plastics or scrap tires in the bale, and the separation of aluminum and magnesium by melting. The heat for this first stage is transferred through flue gases rising from the second and third stages after passing through a recuperator. The remaining scrap once separated from zinc, aluminum, magnesium and plastics is transferred to a second stage and melted and allowed to flow into a third stage where alloying and final removal of sulfur, phosphorus and other contaminants is completed in the hearth under a reverberating flame. Flue gases rising from the first stage are passed through condensers to precipitate vaporized zinc, and to convert hydrocarbons into fuel that is burned in the third stage burner above the hearth.

Disclosed are methods and systems for producing a gas from a combustible material. In particular, disclosed are methods and systems for batch-type production of a gas from a combustible material. The methods and systems include igniting at least a portion of the combustible material loaded in the sealed containment structure to form a thermally affected layer, wherein the step of feeding the oxidant into the sealed containment structure is carried out so that conversion of the combustible material to a gas at one point in the sequence is initiated prior to complete conversion of the combustible material at a previous point in the sequence.

A method is provided for thermally converting non-radioactive combustible wastes to a substantially non-hazardous, non-leachable, sintered particulate carbon-less ash by-product in a kiln having a plurality of reaction zones. The kiln including first and second ends and a body provided between the first and second ends that defines a cavity having a refractory lining that provides resistance to heat conduction. A processor and flow rate controllers are provided that control a flow rate through the body of waste that enters at the first end of the kiln and the flow rate of oxidant gas that enters at the second end of the kiln, the second end being opposite to the first end. The body may be positioned substantially horizontal and may include a length-to-diameter ratio and a resistance to heat conduction that provides a temperature gradient within the cavity to forms separate reaction zones during operation.

In a method for the combustion management in firing installations, in which a primary combustion gas quantity is conveyed through the fuel into a primary combustion area, part of the waste gas flow is extracted in the rear grate area and returned to the combustion process in the form of internal recirculation gas. In this case, no secondary combustion air is supplied between the grate and the supply of the internal recirculation gas. A firing installation for carrying out this method features nozzles above the firing grate such that no air supply is arranged between the firing grate and the nozzles.