Abstract:
A gas mixture preheated to high temperatures using an oxy-fuel, an oxygen-enriched air-fuel or an air-fuel burner is used to devolatilize and partially oxidize carbonaceous feedstock, thereby producing an active residual char that can be used in applications utilizing activated carbon. Use of hot gas and ground carbonaceous feedstock allows the equipment to be minimized, thereby allowing the activated carbon to be produced at or near points of use, for example the production of activated char at or near utility boilers for use in the reduction of mercury emissions from flue gas streams.
Abstract:
A novel tar-free gasification process and system is disclosed that involves the partial combustion of recycled dry solids and the drying of a slurry feedstock comprising carbonaceous material in two separate reactor zones in a two stage gasifier, thereby producing mixture products comprising synthesis gas. The synthesis gas produced from the high temperature first stage reaction zone is then quenched in the second stage reaction zone of the gasifier prior to introduction of a slurry feedstock. The temperature of the final syngas exiting the second stage reaction zone of the gasifier is thereby moderated to be in the range of about 350-900° F., which is below the temperature range at which tar is readily formed, depending upon the type of carbonaceous feedstock utilized.
Abstract:
In the case of a gasification reactor for the production of crude gas, containing CO or H2, by gasification of ash-containing fuel with oxygen-containing gas, at temperatures above the melting temperature of the ash, wherein a reaction chamber formed by a membrane wall through which coolant flows, within a pressure container, is provided, with a narrowing transition channel into a gas cooling chamber, wherein spin-reducing, cooled bulkheads are provided in the transition channel, a solution is to be created, with which a strand formation of the outflowing ash can be achieved, for one thing, and, for another, a further slag drip edge that ensures optimal slag outflow is made available.This is achieved in that the wall (14) that carries the bulkheads (9) makes a transition, below the bulkheads, into a cylinder wall (17) that is reduced in diameter, by way of a step (21) having a corrugated surface, that the cylinder wall (17), which is reduced in diameter, is enclosed by a further cylindrical wall (19), which is enlarged in diameter, which wall forms a second slag drip edge (10) at its end, in the direction of gravity, and that the further cylindrical wall (19) is disposed to be adjustable (arrow 22) in its vertical position, with reference to the first drip edge (18).
Abstract:
A system and method for providing an integrated indirectly fired reactor and steam generator are disclosed. According to one embodiment, the reactor comprises an indirect heating zone heating water and generating steam, a mixing zone mixing feedstock and the steam and providing a mixture of the feedstock and the steam, and a reaction zone comprising a first reactor and a second reactor. The first reactor converts the mixture to a first syngas at a first temperature. The second reactor converts the first syngas to a second syngas at a second temperature, the second temperature being higher than the first temperature.
Abstract:
The present invention, in one configuration, is directed to producing a methane-containing gas from a hydrocarbon fuel energy source extracted from an in-situ recovery operation, such as a SAGD or HAGD operation, and subsequently converting at least a portion of the gas into steam, electrical power and diluents for subsequent use in the aforementioned in-situ recovery operation while emitting only controlled amounts of carbon dioxide into the environment.
Abstract:
A method of thermal treatment of material in a reactor with a high-temperature chamber and with a self-crucible wall, including at least determining liquidus temperature Tliq of ashes derived from the treated material, wherein the operating temperature of the reactor Tfonc in its steady state is then chosen such that Tfonc>Tliq.
Abstract:
A method of cooling hot fluid flowing through a chamber is provided. The method includes channeling cooling fluid through at least one cooling tube that extends through a passage of the chamber, and circulating the hot fluid flowing within the passage around the at least one cooling tube using at least one fluid diverter.
Abstract:
A system, including a gasifier comprising a wall defining a chamber, an inlet, an outlet, and a port, a combination feed injector coupled to the inlet, wherein the combination feed injector is configured to inject a first fuel and air or oxygen into the chamber to preheat the gasifier, and the combination feed injector is configured to inject a second fuel and oxygen into the gasifier after preheating to gasify the second fuel, an optical device coupled to the port, a sensor coupled to the optical device, and a monitoring system coupled to the sensor, wherein the monitoring system is configured to acquire data from the sensor, process the data, and provide an output representative of a condition of the gasifier based on the data.
Abstract:
A gasifier that includes a combustion chamber and a pressure vessel surrounding the combustion chamber, wherein the pressure vessel includes an inner surface. A heater surrounds the pressure vessel and increases a temperature of the inner surface of the pressure vessel. A method for operating a gasifier includes increasing an inner wall temperature of a pressure vessel surrounding the gasifier.
Abstract:
A sealing apparatus adapted for use in a pressure vessel such as a synthesis gas cooler. The sealing apparatus is of a segmented plate construction formed around an outer wall section of a conduit means of the pressure vessel that defines at least part of a passage for receiving effluent from a gasification process. Pressure responsive mechanisms are provided on the plate segments to maintain the pressure difference across the sealing apparatus within the acceptable operating limits as well as to permit instantaneous pressure release to prevent damage to the pressure part assembly or cage. The seal is also maintained continuously through the differential growth movement between the conduit means and the pressure vessel during heat up and cool down cycles.