467results about "Gasifier mechanical details" patented technology

Systems for converting a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, two separate gasification reactors to convert a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.

A low-temperature gasification system comprising a horizontally oriented gasifier is provided that optimizes the extraction of gaseous molecules from carbonaceous feedstock while minimizing waste heat. The system comprises a plurality of integrated subsystems that work together to convert municipal solid waste (MSW) into electricity. The subsystems comprised by the low-temperature gasification system are: a Municipal Solid Waste Handling System; a Plastics Handling System; a Horizontally Oriented Gasifier with Lateral Transfer Units System; a Gas Reformulating System; a Heat Recycling System; a Gas Conditioning System; a Residue Conditioning System; a Gas Homogenization System and a Control System.

The invention provides systems and methods for converting biomass into syngas using a pressurized multi-stage progressively expanding fluidized bed gasifier to eliminate or reduce the formation of methane, volatiles such as BTX, and tars. The gasifier may include a reactive stage that may receive a biomass feed through a feed line and oxygen through an oxygen feed line. The gasifier may also include a fluidized bed section that may be configured to receive the reaction products from the first stage, mix them and perform fluidized bed activity. A gasifier may also have a disengagement section that may be configured to separate fluidized media and particulate matter from syngas product. A gasification system may also include oxyblown catalytic autothermal reactor and a cryogenic air separation unit.

Method and apparatus for generating a low tar, renewable fuel gas from biomass and using it in other energy conversion devices, many of which were designed for use with gaseous and liquid fossil fuels. An automated, downdraft gasifier incorporates extensive air injection into the char bed to maintain the conditions that promote the destruction of residual tars. The resulting fuel gas and entrained char and ash are cooled in a special heat exchanger, and then continuously cleaned in a filter prior to usage in standalone as well as networked power systems.

The present invention provides a gas conditioning system for processing an input gas from a low temperature gasification system to an output gas of desired characteristics. The system comprises a two-stage process, the first stage separating heavy metals and particulate matter in a dry phase, and the second stage including further processing steps of removing acid gases, and/or other contaminants. Optional processes include adjusting the humidity and temperature of the input gas as it passes through the gas conditioning system. The presence and sequence of processing steps is determined by the composition of the input gas, the desired composition of output gas for downstream applications, and by efficiency and waste minimization.

A method and device for the gasification of pulverized fuels from solid fuels such as bituminous coals, lignite coals, and their cokes, petroleum cokes, coke from peat or biomass, in entrained flow, with an oxidizing medium containing free oxygen, by partial oxidation at pressures between atmospheric pressure and 80 bar, and at temperatures between 1,200 and 1,900° C., at high reactor capacities between 1,000 and 1,500 MW. The method uses the following steps: metering of the fuel, gasification reaction in a gasification reactor with cooled reaction chamber contour, quench-cooling, crude gas scrubbing, and partial condensation.

A waste-to-synthesis gas system including: a first gasifier for receiving biomass; a gas distributor for delivering reactant gas and oxygen into the first gasifier in a countercurrent direction to the biomass flow and to define a plurality of reaction regions including a drying region, a pyrolysis region, a gasification region and a combustion region; and, a second gasifier for receiving gases from the plurality of regions of the first gasifier and a gas distributor for delivering reactant gas and oxygen into the second gasifier in a concurrent direction to the flow of gases from the first gasifier. As a result, no carbon chars, oils or tars are expected to be present in the synthesis gas produced.

A method and apparatus is described for reformulating of an input gas from a gasification reaction into a reformulated gas. More specifically, a gas reformulating system having a gas reformulating chamber, one or more plasma torches, one or more oxygen source(s) inputs and control system is provided thereby allowing for the conversion of an input gas from a gasification reaction into a gas of desired composition.

A method of producing synthesis gas by introducing a feed material to be gasified into a gasification apparatus comprising at least one fluidized component operable as a fluidized bed, wherein the gasification apparatus is configured to convert at least a portion of the feed material into a gasifier product gas comprising synthesis gas; and maintaining fluidization of the at least one fluidized component by introducing a fluidization gas thereto, wherein the fluidization gas comprises at least one component other than steam. A system for producing synthesis gas is also provided.

Pyrolyzing gasification system and method of use including primary combustion of non-uniform solid fuels such as biomass and solid wastes within a refractory lined gasifier, secondary combustion of primary combustion gas within a staged, cyclonic, refractory lined oxidizer, and heat energy recovery from the oxidized flue gas within an indirect air-to-air all-ceramic heat exchanger or external combustion engine. Primary combustion occurs at low substoichoimetric air percentages of 10-30 percent and at temperatures below 1000 degrees F. Secondary combustion is staged and controlled for low NOx formation and prevention of formation of CO, hydrocarbons, and VOCs. The gasifier includes a furnace bed segmented into individual cells, each cell is independently monitored using a ramp temperature probe, and provided with controlled air injection. Gasifier air injection includes tuyere arrays, lances, or both. The oxidizer includes three serially aligned stages separated by air injecting baffles, and ability to adjust the exit air temperature.

A gasifier is disclosed combining a fixed bed gasification section where coarse fuel is gasified and an entrained flow gasification section where fine fuel is gasified. The fixed bed section includes upper and lower sections. Coarse fuel is devolatilized in the upper fixed bed section and subjected to elevated temperatures sufficient to crack and destroy tars and oils in the effluent gases. The entrained flow gasification section is disposed in a lower plenum adjacent the lower fixed bed section. A plurality of injection ports are configured to introduce oxygen, steam, or air into different sections of the gasifier to control temperature and operating conditions. Activated carbon may be formed in the upper fixed bed section and in the entrained flow section. The activated carbon may be used as a sorbent to remove pollutants from the effluent gases. The gasifier may be used with various coarse and fine fuel feedstocks.

A hot gas filtration apparatus includes a vessel, a plurality of filter elements mounted within the vessel and positioned such that hot gas flows through said filter elements, with each of said filter elements having a porous body, and a catalytic layer on surfaces of the porous body. The porous body of the filter element may include one of: a porous ceramic monolithic matrix, a continuous fiber reinforced ceramic composite (CFCC) matrix, a metallic matrix, an intermetallic matrix, a superalloy, and a metal-ceramic composite matrix. When the porous body is a nonoxide ceramic, a metallic matrix, an intermetallic matrix, a superalloy, or a metal-ceramic composite matrix, the invention further includes an oxidative resistant layer coating surfaces within the porous body, and the catalytic layer is on the oxidative resistant layer. A porous particulate removal membrane can be positioned on one or more surfaces of the filter element. The porous membrane can also provide a surface for one or more catalysts. The catalysts on the porous surface of the membrane(s) can be the same as or different from the catalysts on surfaces within the porous body.

A method and apparatus for producing hydrogen from carbonaceous materials using a hydrogen-selective permeation membrane incorporated into a carbonaceous material reactor, as a result of which, hydrogen production rate from the reactor is increased, downstream gas cleaning and purification units of conventional systems are eliminated or substantially reduced in size, and the thermal efficiency of producing hydrogen from carbon-containing materials is increased and its production cost is reduced.

A gasification reactor comprising a vessel (1), provided at its upper end with a downwardly directed burner (2), and provided with supply conduits for an oxidizer gas (3), a carbonaceous feed (4) and a moderator gas (5), a combustion chamber (6) in the upper half of the vessel provided with a product gas outlet (7) at its bottom end and an opening for the outlet of the burner (2) at its top end, wherein between the wall of the combustion chamber (6) and the wall of the vessel (1) an annular space (9) is provided, and wherein the wall of the combustion chamber (6) comprises an arrangement of interconnected parallel arranged tubes (10) resulting in a substantially gas-tight wall running from a common lower arranged distributor (12) to a higher arranged common header (11), said distributor (12) provided with a cooling water supply conduit (14) and said header (11) provided with a steam discharge conduit (13) and wherein the steam discharge conduit (13) and the water supply conduit (14) are fluidly connected to a steam drum (29) and wherein the steam drum (29) is provided with a supply conduit (32) for fresh water and wherein the steam drum (29) is positioned at a higher elevation than the common header (11).

A process is provided for producing syngas that is effective for use in downstream processes. The process for producing syngas includes operating a gasification apparatus in a start-up mode until the gasification apparatus and equipment downstream of the gasification apparatus are adequately warmed up to a first target temperature. Upon reaching a first target temperature, the process is then operated in a production mode to produce a second syngas with a higher CO/CO₂ molar ratio. Operation in a start-up mode until reaching a first target temperature, provides a process that is effective for reducing fouling in downstream equipment and for providing a second syngas can be more effectively cooled and cleaned.

A method of assembling a synthesis gas (syngas) cooler for a gasification system includes positioning a dip tube within a shell of the syngas cooler. The dip tube is configured to quench the syngas flowing through the shell and/or at least partially channel the syngas through the dip tube. The method also includes coupling an isolation tube to the dip tube such that the isolation tube is substantially concentrically aligned with, and radially outward of, the dip tube. The isolation tube is coupled in flow communication with a purge gas source and is configured to at least partially form a dynamic pressure seal. The method further includes coupling at least one of the isolation tube and the dip tube in fluid communication with a fluid retention chamber. The method also include at least partially filling the fluid retention chamber with fluid, thereby further forming the dynamic pressure seal.

An improved quench ring in combination with a reactor vessel having a refractory lined reaction chamber with a bottom outlet and a floor to support the refractory lined reaction chamber, wherein the quench ring is protected by a protective barrier comprising dense refractory brick, dense refractory ramming mix, refractory ceramic fiber, and a metal apron support. The protective barrier is removably attached to a portion of the quench ring hotface and protects the quench ring from the high temperature of the effluent exiting the reaction chamber.

A method and device for the gasification of solid fuels such as bituminous coals, and cokes such as those from bituminous coals, lignite coals, and biomasses, as well as petroleum cokes, that are ground fine and mixed with water or oil to obtain fuel-in-liquid suspensions, so-called slurries, and their gasification together with an oxidizing medium containing free oxygen, by partial oxidation at pressures between atmospheric pressure and 100 bar, and at temperatures between 1200 and 1900° C. in an entrained flow reactor. The method includes slurry preparation and infeed to the reactor, gasification in an entrained flow reactor with cooled reaction chamber contour, full quenching of the crude gas to saturation temperature that may be 180-260° C. depending on the gasification pressure, and wet or dry dust separation. The crude gas is pretreated so that it can be fed to further technological steps such as crude gas conversion, H₂S and CO₂ removal, and synthesis.

A gasifier includes a combustion chamber in which a combustible fuel is burned to produce a syngas and a particulated solid residue. A quench chamber having a liquid coolant is disposed downstream of the combustion chamber. A dip tube is disposed coupling the combustion chamber to the quench chamber. The syngas is directed from the combustion chamber to the quench chamber via the dip tube to contact the liquid coolant and produce a cooled syngas. A draft tube is disposed surrounding the dip tube such that an annular passage is formed between the draft tube and the dip tube. An asymmetric or symmetric baffle is disposed proximate to an exit path of the quench chamber. The cooled syngas is directed through the annular passage and impacted against the asymmetric or symmetric baffle so as to remove entrained liquid content from the cooled syngas before the cooled syngas is directed through the exit path.

There is described a reactor for entrained flow gasification for operation with dust-type or liquid fuels, wherein a number of gasification burners are disposed away from the reactor axis, with the center line of a gasification burner having an oblique position that is other than parallel to the reactor axis, it being possible for said oblique position to extend at different angles up to an angle of 90°. The center line does not necessarily have to intersect the reactor axis; rather the center line can pass the reactor axis at a predetermined distance. This arrangement is associated with a significant reduction in the unwanted discharge of dust-type fine slag, which is difficult to utilize, in conjunction with the possibility of reducing the reactor diameter due to its structure.