Abstract:
A reactor enables gasification or melting of waste and additional feed materials. The reactor includes a co-current section with a plenum section and a feed section with a sluice. Feed materials are introduced into the reactor. The reactor further includes a buffer section and a pre-treatment section, which adjoins a bottom of the buffer section to create a cross-sectional enlargement. An intermediate section adjoins the pre-treatment section. An upper oxidation section adjoins a bottom of the intermediate section and includes tuyeres in at least one level. An upper reduction section adjoins a bottom of the upper oxidation section. The reactor further includes a gas outlet section. The reactor further includes a countercurrent section having a conical lower reduction section and a conical lower oxidation section adjoining the conical lower reduction section having at least one tuyere and at least one tapping.
Abstract:
The present invention discloses a gasifier and/or a gasification process that provides a long, uniform temperature zone in the gasifier, regardless of the particle size, chemical composition, and moisture content of the fuel by sandwiching a reduction zones between two oxidation zones. The gasifier and/or gasification process has a char that is more energy-dense and almost devoid of moisture that affords for an additional (or char) oxidation zone with a temperature that is higher than a first oxidation zone which is closer to an evaporation and devolatilization zone. As such, the additional (or char) oxidation zone contributes to augmenting the reduction zone temperature, thereby providing a favorable dual impact in improving syngas composition and near-complete conversion of the tar.
Abstract:
An optimized gasification/vitrification processing system having a gasification unit which converts organic materials to a hydrogen rich gas and ash in communication with a joule heated vitrification unit which converts the ash formed in the gasification unit into glass, and a plasma which converts elemental carbon and products of incomplete combustion formed in the gasification unit into a hydrogen rich gas.
Abstract:
A process for producing synthesis gas by gasifying a carbon carrier in a slurry having a significant content of phosphorus. According to the invention, the phosphorus compounds dissolved in the liquid phase of the suspension are at least partly precipitated by treating the suspension by increasing the pH of the suspension and/or increasing the concentration of metal cations in the suspension, before the suspension is heated further and subsequently applied to the gasification reactor.
Abstract:
An optimized gasification/vitrification processing system having a gasification unit which converts organic materials to a hydrogen rich gas and ash in communication with a joule heated vitrification unit which converts the ash formed in the gasification unit into glass, and a plasma which converts elemental carbon and products of incomplete combustion formed in the gasification unit into a hydrogen rich gas.
Abstract:
A method and assembly for producing substantially tar free product gas from gasification of carbonaceous material. The assembly preferably includes a first stage gasifier to produce char-ash and tar laden product gas and a second stage gasifier which has a char-ash heating zone, at least one cyclone, and at least one standpipe for the purpose of allowing selective delivery of char-ash to the char-ash heating zone. A char-ash heating zone that utilizes oxidation of char-ash is preferred and this results in the heat required to convert tar, additional yield of product gas, and an oxidized, activated carbon surface to facilitate tar conversion in the riser, thereby reducing the temperature required to achieve the desired tar conversion. Alternatively, external heat is supplied to the heating zone.
Abstract:
A gasification system method and apparatus to convert a feed stream containing at least some organic material into synthesis gas having a first region, a second region, a gas solid separator, and a means for controlling the flow of material from the first region to the second region. The feed stream is introduced into the system, and the feed stream is partially oxidized in the first region thereby creating a solid material and a gas material. The method further includes the steps of separating at least a portion of the solid material from the gas material with the gas solid separator, controlling the flow of the solid material into the second region from the first region, and heating the solid material in the second region with an electrical means.
Abstract:
A gasifier comprises an internal chamber, a slag collection region, a slag passageway, a slag breaker, and an actuator. The internal chamber comprises a main combustion region that is configured and adapted to gasify fuel. The slag collection region is located beneath the main combustion region. The slag passageway operatively connects the main combustion region to the slag collection region. The slag breaker comprises a face that is movable relative to the internal chamber. The face is configured and adapted to move within the slag passageway in a manner such that the face contacts and mechanically breaks solidified slag into chunks of solidified slag that then fall into the slag collection region. The actuator is connected to the slag breaker and is configured and adapted to move the face of the slag breaker.
Abstract:
A method facilitating the deslagging of a partial oxidation reactor used to produce syngas is disclosed. The slag comprises vanadium trioxide and a siliceous material that accumulate on the interior walls of the partial oxidation reactor as a byproduct of the syngas production. The deslagging is accomplished by controlled oxidation, wherein the vanadium to glass weight ratio is maintained to at least about 3:2, operating the reactor at a temperature of at least about 2000.degree. F, and maintaining controlled oxidation conditions sufficient to convert the vanadium trioxide in the slag to vanadium pentoxide.
Abstract:
The progress and completion of slag removal from the quench chamber of a partial oxidation reactor during controlled oxidation can be monitored by measuring such quench water parameters as pH, conductivity, total dissolved solids, and sulfate concentration.