A pyrolysis gasifier includes a tubular body configured to receive and pyrolyze a combustible waste, a bottom door disposed below the tubular body to selectively seal the tubular body, a main frame supporting the tubular body, a base frame supporting the bottom door, an automatic ash processor configured to, while traveling in one direction, push and remove ash remaining on the bottom door after pyrolysis of the combustible waste, and a guide frame supporting the automatic ash processor and configured to guide the travel of the automatic ash processor.

A hybrid plasma reactor system that uses multiple sets of long electrodes that are placed longitudinally opposite each other within modular plasma units. The plasma units can be stacked to form an elongated plasma zone. The electrode assemblies extend into access ports. Each of the electrode assemblies has an electrode tip mounted in a tubular support jacket. A gas conduit for a supplied working gas surrounds at least a portion of the tubular support jacket. An arc is created at the electrode tip. A working gas flows through the gas conduit and is directed into the arc, therein creating plasma within the internal plasma zone.

A hybrid plasma reactor system that uses multiple sets of long electrodes that are placed longitudinally opposite each other within modular plasma units. The plasma units can be stacked to form an elongated plasma zone. The electrode assemblies extend into access ports. Each of the electrode assemblies has an electrode tip mounted in a tubular support jacket. A gas conduit for a supplied working gas surrounds at least a portion of the tubular support jacket. An arc is created at the electrode tip. A working gas flows through the gas conduit and is directed into the arc, therein creating plasma within the internal plasma zone.

The purpose of the present invention is to provide a furnace wall in which a throat section with a smaller channel diameter than other regions can be formed using all peripheral wall tubes. Provided is a furnace wall comprising: a plurality of peripheral wall tubes (142), which are disposed so as to form a cylindrical shape when aligned in one direction and through the interior of which cooling water flows; and fins (140) that connect neighboring peripheral wall tubes (142) in an airtight manner. In a throat section in which the diameter of a horizontal cross-section of the cylindrical shape is reduced in comparison to other regions, the peripheral wall tubes (142) are disposed so as to be in mutual contact and the fins (140) are disposed on the inner circumferential sides of the cylindrical shapes.

A sintered refractory product having a granulate bonded by a matrix and comprising, in percentages by mass based on the oxides, more than 40% chromium oxide Cr.sub.2O.sub.3, less than 50% aluminium oxide Al.sub.2O.sub.3, 1% or more zirconium oxide ZrO.sub.2, of which at least 20% by mass is stabilised in the cubic and/or quadratic form, 0.1% or more yttrium oxide Y.sub.2O.sub.3, acting as a stabiliser for the zirconium oxide ZrO.sub.2, less than 1.9% hafnium oxide HfO.sub.2, the total content of chromium, aluminium and zirconium oxides Cr.sub.2O.sub.2+Al.sub.2O.sub.3+ZrO.sub.2 being greater than 70%.

A sintered refractory product having a granulate bonded by a matrix and comprising, in percentages by mass based on the oxides, more than 40% chromium oxide Cr.sub.2O.sub.3, less than 50% aluminium oxide Al.sub.2O.sub.3, 1% or more zirconium oxide ZrO.sub.2, of which at least 20% by mass is stabilised in the cubic and/or quadratic form, 0.1% or more yttrium oxide Y.sub.2O.sub.3, acting as a stabiliser for the zirconium oxide ZrO.sub.2, less than 1.9% hafnium oxide HfO.sub.2, the total content of chromium, aluminium and zirconium oxides Cr.sub.2O.sub.2+Al.sub.2O.sub.3+ZrO.sub.2 being greater than 70%.

Embodiments of the invention improve the performance, safety, and efficiency of the gasification process. Embodiments of the invention improve downdraft gasification by improving upon the systems and methods for fuel preparation and by addressing gasifier bridging and channeling. Unique parts of the system include a unique hearth and grate design, a programmable logic controller and interface for managing the gasification process, an improved filtration system, a unique system for eliminating mist, a unique system for cooling gas, a unique combined flare, an integrated auger system, and a new system and method for sampling gas.

A hybrid plasma reactor system that uses multiple sets of long electrodes that are placed longitudinally opposite each other within modular plasma units. The plasma units can be stacked to form an elongated plasma zone. The electrode assemblies extend into access ports. Each of the electrode assemblies has an electrode tip mounted in a tubular support jacket. A gas conduit for a supplied working gas surrounds at least a portion of the tubular support jacket. An arc is created at the electrode tip. A working gas flows through the gas conduit and is directed into the arc, therein creating plasma within the internal plasma zone.

A hybrid plasma reactor system that uses multiple sets of long electrodes that are placed longitudinally opposite each other within modular plasma units. The plasma units can be stacked to form an elongated plasma zone. The electrode assemblies extend into access ports. Each of the electrode assemblies has an electrode tip mounted in a tubular support jacket. A gas conduit for a supplied working gas surrounds at least a portion of the tubular support jacket. An arc is created at the electrode tip. A working gas flows through the gas conduit and is directed into the arc, therein creating plasma within the internal plasma zone.

The invention concern methods for converting carbonaceous feedstock slurry into synthetic fuel gas comprising: (a) introducing a carbonaceous feed stock slurry into a first reaction vessel via a continuous feed; (b) converting said carbonaceous feed stock slurry to a carbon char slurry comprising carbon char, and water by allowing said carbonaceous feed stock slurry to have a residency time of between 5 and 30 minutes in said first reaction vessel, said carbonaceous feed stock slurry being heated to a temperature of between about 260 to about 320 C. at a pressure such that water does not flash to steam.