US20120131852A1 - Moisture removal for gasification quench chamber assembly - Google Patents
Moisture removal for gasification quench chamber assembly Download PDFInfo
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- US20120131852A1 US20120131852A1 US12/957,266 US95726610A US2012131852A1 US 20120131852 A1 US20120131852 A1 US 20120131852A1 US 95726610 A US95726610 A US 95726610A US 2012131852 A1 US2012131852 A1 US 2012131852A1
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- United States
- Prior art keywords
- syngas
- quench chamber
- gasification
- transfer pipe
- moisture
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
Definitions
- the invention relates generally to gasifiers, and more particularly to moisture removal at or near the exit of a quench chamber.
- a particulated carbonaceous fuel such as coal or coke or a carbonaceous gas
- the process is carried out at relatively hot temperatures and high pressures in a combustion chamber.
- a particulated carbonaceous fuel such as coal or coke or a carbonaceous gas
- an effluent is discharged through a port at a lower end of the combustion chamber to a quench chamber disposed downstream of the combustion chamber.
- the quench chamber contains a liquid coolant such as water.
- the effluent from the combustion chamber is contacted with the liquid coolant in the quench chamber; so as to reduce the temperature of the effluent.
- the gasifier arrangement permits a solid portion of the effluent, in the form of ash, to be retained in the liquid pool of the quench chamber, and subsequently to be discharged as slag slurry.
- a gaseous component of the effluent is discharged from the quench chamber for further processing.
- the gaseous component in passing through the quench chamber, will carry with it a substantial amount of the liquid coolant.
- a minimal amount of liquid entrained in the exiting gas is not considered objectionable to the overall process.
- excessive liquid carried from the quench chamber and into downstream equipment is found to pose operational problems.
- a baffle is placed in the gas exiting path in the quench chamber. Consequently, as liquid-carrying gas contacts the baffle surfaces, a certain amount of the liquid will coalesce on the baffle surfaces. However, the rapidly flowing gas will re-entrain liquid droplets by sweeping droplets from the baffle's lower edge.
- a gasification assembly comprises a quench chamber having a liquid coolant disposed therein; a dip tube configured to couple a combustion chamber to the quench chamber and configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas; and a transfer pipe in fluid communication with the cooled syngas, configured to transfer the cooled syngas to a downstream scrubber component, wherein the transfer pipe further comprises an excess moisture removal device, configured to remove moisture from the cooled syngas.
- FIG. 1 depicts a sectional elevation view of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention
- FIG. 2 depicts a close-up sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention
- FIG. 3 depicts a top sectional view of the transfer pipe portion of a gasification quench chamber assembly in FIG. 2 in accordance with an exemplary embodiment of the present invention
- FIG. 4 depicts a close-up sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention
- FIG. 5 depicts an end sectional view of the transfer pipe portion of a gasification quench chamber assembly in FIG. 4 in accordance with an exemplary embodiment of the present invention
- FIG. 6 depicts a sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention.
- FIG. 7 depicts a sectional elevation view of a gasification quench chamber assembly in accordance with another exemplary embodiment of the present invention.
- a gasifier having a quench chamber assembly configured to reduce temperature of syngas downstream of a gasification chamber.
- the gasifier includes a quench chamber containing a liquid coolant disposed downstream of the gasification chamber.
- a syngas generated from the gasification chamber is directed via a dip tube to the quench chamber to contact the liquid coolant and produce a cooled syngas.
- a baffle is disposed proximate to an exit path of the quench chamber.
- a draft tube may be disposed surrounding the dip tube such that an annular passage is formed between the draft tube and the dip tube.
- the cooled syngas is directed through the annular passage (if present) and impacted against the baffle so as to remove entrained liquid content from the cooled syngas before the cooled syngas is directed through the exit path.
- a deflector plate is disposed between the liquid coolant and the exit path of the quench chamber and configured to remove entrained liquid content from the cooled syngas and prevent sloshing of liquid content to the exit path.
- the baffle is asymmetric or symmetric, either open or angular, to remove entrained liquid content from the cooled syngas.
- the baffle itself can have channels or cut-outs and overlays to remove entrained liquid and prevent sloshing of liquid content to the exit path.
- dip tube In other embodiments only dip tube is present and the annular section is formed between the dip tube and the quench chamber wall.
- asymmetric or symmetric shaped baffle, deflector plate, swirl generator, or combinations thereof substantially reduces entrainment of liquid content in the syngas directed through the exit path to the downstream components (e.g., scrubber assembly, etc.).
- An entrainment mitigation mechanism, or moisture removal device, is provided at, or along, the transfer pipe exiting the quench chamber. Specific embodiments are discussed in greater detail below with reference to FIGS. 1-7 .
- a gasification quench chamber assembly which includes the quench chamber, proper, and other appurtenances such as the quench chamber exit pipe, or transfer line.
- Quench is typically presented downstream of the gasification chamber and used to reduce the temperature of the manufactured syngas as well as remove (at least partially) solids/fines.
- the syngas is introduced into the quench chamber via a dip tube.
- the quench chamber contains a liquid coolant, which reduces the temperature of the syngas. After quenching, the syngas rises up, due to buoyancy.
- the purpose of the entrainment baffle(s) is ostensibly to knock off water droplets, which are entrained with the outgoing syngas.
- the entrainment baffle(s) is not 100% efficient in removal of the liquid from the syngas, liquid is still present in the syngas exiting the quench chamber via the exit pipe.
- the amount of fines and liquid entrainment in the outgoing syngas also poses a significant challenge in the instrumentation and/or measuring the amount of liquid getting entrained in the quench chamber exit pipe.
- aspects of the present invention increase the overall effectiveness and efficiency of the gasification system by improving upon the removal of entrained liquid from the generated syngas. Further aspects of the present invention address improved removal of entrained liquid while reducing manufacturing costs and/or operating expenses. Aspects of the present invention offer a simplified design, which additionally improve the life of the assembly and reliability, availability, and maintenance of the gasification plant.
- the entrainment mitigation mechanisms depicted in FIGS. 1-7 may be employed separately or in combination with one another. Moreover, as may be appreciated, the relative sizes, shapes, and geometries of the entrainment mitigation mechanisms may vary. The entrainment mitigation mechanisms may be employed along with a quench chamber during the initial manufacturing, or the entrainment mitigation mechanisms may be retrofit to existing quench units. Further, the entrainment mitigation mechanisms may be adjusted based on operational parameters, such as the type of carbonaceous fuel, the system efficiency, the system load, or environmental conditions, among others to achieve the desired amount of flow damping.
- a gasification quench chamber assembly, or gasification assembly, 800 comprises a quench chamber 802 and a transfer pipe 870 .
- the quench chamber 802 is in fluid communication with a gasification chamber 900 , upstream, and quench chamber 802 is in fluid communication with a scrubber assembly 920 , downstream, via the transfer pipe 870 .
- the transfer pipe 870 may be additionally in fluid communication with the quench chamber 802 via a return tube 874 .
- the transfer pipe 870 may additionally be in fluid communication with a heat source 910 (e.g., gas turbine, etc.) via a supply line 878 as shown in FIG. 7 .
- a heat source 910 e.g., gas turbine, etc.
- the quench chamber 802 comprises a dip tube 806 which is configured to couple the gasification chamber 900 to the quench chamber 802 and is further configured to direct syngas 1000 from the combustion chamber 900 to a liquid coolant 804 contained in a portion of the quench chamber 802 .
- the quench chamber 802 may further include an inlet line 805 for providing any requisite liquid coolant 804 to the quench chamber 804 .
- the quench chamber 804 may further comprise at least one baffle 808 that aids in knocking out and/or off water droplets entrained in the exiting syngas 1002 .
- FIGS. 1 and 7 depict a quench chamber 802 having a dip tube-only configuration
- the quench chamber 802 may alternatively employ a dip/draft configuration, a dip only configuration, a dip/draft with a quench ring configuration, and the like.
- the transfer pipe 870 is configured to provide a means for transmitting the cooled syngas 1002 to the scrubber assembly 920 and other downstream components (not shown).
- the transfer pipe, or line, 870 further comprises an excess liquid removal device, or entrainment mitigation mechanism, 872 that is configured to further remove excess liquid (e.g., water, etc.) from the cooled syngas 1002 so that a cooled syngas 1006 , with an even smaller amount of liquid, ultimately is conveyed to the downstream scrubber assembly 920 and other downstream components.
- excess liquid e.g., water, etc.
- the excess liquid removal device 872 employed by aspects of the present invention include one or more of applying a centrifugal action or force to remove excess liquid from the cooled syngas 1002 ; and/or perforating at least a portion of the transfer pipe 870 to provide an egress means for excess liquid (e.g., water droplets) in the cooled syngas 1002 .
- excess liquid e.g., water droplets
- a water injection line may also be provided, as denoted by 950 and 960 .
- water may be added along the line 870 in one or more locations.
- the injection line may be located anterior to the 876 as denoted by 950 .
- the injection line may be located within the moisture removal device 870 .
- the water injection line may be located in either of these locations, or both locations, as well as any location along the transfer line 870 .
- the transfer line 870 includes an excess liquid removing device 872 that comprises a plurality of perforations 880 configured to allow egress of moisture from the transfer pipe 870 .
- a sleeve 889 such as a cold-water sleeve, may be provided, wherein the sleeve 889 partially or substantially surrounds a portion of the transfer pipe 870 .
- the sleeve 889 may contain a cooling fluid (e.g., water) therein that has a temperature that is less than a temperature of the cooled syngas 1004 within the transfer pipe 870 .
- the sleeve 889 aids in further condensing moisture in the travelling syngas 1004 so that the moisture may drop or settle out via the plurality of perforations 880 and be collected via collection pipe 882 and returned via return line 874 back to the quench chamber 802 ( FIG. 1 ).
- FIGS. 2 and 3 may be provided without departing from aspects of the present invention.
- the perforations may have different quantities, shapes, configurations, patterns, and the like, from those shown.
- the sleeve may surround the transfer line 870 in a different manner.
- the sleeve may fully or partially surround the transfer line 870 .
- the cooling fluid used in the cooling sleeve may be any suitable fluid that assists in condensing moisture out of the syngas 1004 .
- the transfer line 870 includes an excess liquid removing device 872 that comprises a baffle 876 or similar means for exerting or employing centrifugal force to the syngas 1004 .
- the baffle 876 may, for example, include one or blades or vanes that are curved or warped in relationship to the direction of travel of the syngas 1004 through the transfer line 870 (See e.g., FIG. 5 ).
- a plurality of perforations 880 may be located on a wall of the transfer line 870 thereby providing an egress means for the moisture (e.g., water droplets) that is spun or forced towards the periphery of the transfer line 870 by the centrifugal force caused by the baffle 876 .
- a return line 874 may be used to return any collected moisture from the perforations.
- the return line 874 maybe in fluid communication with the quench chamber 802 ( FIG. 1 ).
- the moisture removal device 2000 may comprise a pipe 2012 having one or more tees 2010 (e.g., two tees shown in embodiment in FIG. 6 ) extending therefrom.
- the pipe 2012 conveys outgoing syngas 3000 from a quench chamber 802 ( FIG. 1 ) towards a scrubber assembly 920 ( FIG. 1 ).
- the one or more tees 2010 along the pipe 2012 provide a fluid communication connection with an entrainment vessel 2020 .
- the entrainment vessel 2020 gathers moisture 3030 therein and may have a controlled water level.
- the moisture 3030 may be continually flushed back to the quench chamber 802 by a water flow 3015 that is provided into the entrainment vessel 2020 via an input line 2030 .
- the flushing back to the quench chamber 802 via return line 2035 may be continual or periodic so as to prevent plugging.
- the entrainment vessel 2020 may be designed so that any transient excess water flow (i.e., liquid entrainment) may flow back, as denoted by 3020 , to the quench chamber 802 while maintaining an appropriate pressure drop.
- the return line 2035 may include a raised loop 2025 having a height, denoted by D, above the water level of the entrainment vessel 2020 .
- the height, D may be adjustable as required by the particular application in use. In this manner, excess moisture removed from the syngas may be readily removed and returned to the quench chamber 802 for reuse.
- the excess liquid removal device 872 in another embodiment of the present invention includes any combination of: applying a centrifugal action or force to remove excess liquid from the cooled syngas 1002 ; and/or, perforating at least a portion of the transfer pipe 870 to provide an egress means for excess liquid (e.g., water droplets) in the cooled syngas 1002 ; and/or, heating the exiting cooled syngas 1002 so as to evaporate out moisture droplets held in the exiting cooled syngas 1002 .
- excess liquid is effectively removed from the syngas prior to it reaching the scrubber assembly 920 , resulting in an improved gasification process.
- the excess liquid removing device 872 may use evaporation or evaporative means to remove moisture from the syngas 1002 .
- the evaporative means may comprise injecting a fluid 912 at the existing syngas 1004 , wherein the fluid 912 has a higher temperature than the temperature of the exiting syngas 1002 , thereby aiding in evaporating at least a portion of the remaining moisture in the existing syngas 1002 . In this manner, additional moisture is removed from the existing syngas 1002 .
- the fluid 912 may comprise injecting, via an injection line 878 , a hot syngas provided from a heat source 910 or the like.
- the supplied hot syngas 912 is supplied from a heat source 910 that may be a gas turbine, a syngas cooler, a gasifier, and the like.
- a gasification assembly comprises a quench chamber having a liquid coolant disposed therein; a dip tube configured to couple a combustion chamber to the quench chamber and configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas; and a transfer pipe in fluid communication with the cooled syngas, configured to transfer the cooled syngas to a downstream scrubber component, wherein the transfer pipe further comprises an excess moisture removal device, configured to remove moisture from the cooled syngas.
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Abstract
A gasification assembly that includes a quench chamber and downstream transfer piping is disclosed. The gasification assembly includes the quench chamber and a liquid coolant disposed therein, and a dip tube that is configured to couple a combustion chamber to the quench chamber and also configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas. The assembly further includes a transfer pipe that is in fluid communication with the cooled syngas and configured to transfer the cooled syngas to a downstream scrubber component. The transfer pipe further includes an excess moisture removal device, which is configured to remove moisture from the cooled syngas.
Description
- The invention relates generally to gasifiers, and more particularly to moisture removal at or near the exit of a quench chamber.
- In a normal coal gasification process, wherein a particulated carbonaceous fuel such as coal or coke or a carbonaceous gas is burned, the process is carried out at relatively hot temperatures and high pressures in a combustion chamber. When injected fuel is burned or partially burned in the combustion chamber, an effluent is discharged through a port at a lower end of the combustion chamber to a quench chamber disposed downstream of the combustion chamber. The quench chamber contains a liquid coolant such as water. The effluent from the combustion chamber is contacted with the liquid coolant in the quench chamber; so as to reduce the temperature of the effluent.
- When the fuel is a solid such as coal or coke, the gasifier arrangement permits a solid portion of the effluent, in the form of ash, to be retained in the liquid pool of the quench chamber, and subsequently to be discharged as slag slurry. A gaseous component of the effluent is discharged from the quench chamber for further processing. The gaseous component, however, in passing through the quench chamber, will carry with it a substantial amount of the liquid coolant. A minimal amount of liquid entrained in the exiting gas is not considered objectionable to the overall process. However, excessive liquid carried from the quench chamber and into downstream equipment, is found to pose operational problems.
- In conventional systems, a baffle is placed in the gas exiting path in the quench chamber. Consequently, as liquid-carrying gas contacts the baffle surfaces, a certain amount of the liquid will coalesce on the baffle surfaces. However, the rapidly flowing gas will re-entrain liquid droplets by sweeping droplets from the baffle's lower edge.
- There is a need for an improved quench chamber assembly configured to more effectively remove entrained liquid content substantially from the effluent gas.
- In accordance with one exemplary embodiment of the present invention, a gasification assembly comprises a quench chamber having a liquid coolant disposed therein; a dip tube configured to couple a combustion chamber to the quench chamber and configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas; and a transfer pipe in fluid communication with the cooled syngas, configured to transfer the cooled syngas to a downstream scrubber component, wherein the transfer pipe further comprises an excess moisture removal device, configured to remove moisture from the cooled syngas.
- These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
-
FIG. 1 depicts a sectional elevation view of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention; -
FIG. 2 depicts a close-up sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention; -
FIG. 3 depicts a top sectional view of the transfer pipe portion of a gasification quench chamber assembly inFIG. 2 in accordance with an exemplary embodiment of the present invention; -
FIG. 4 depicts a close-up sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention; -
FIG. 5 depicts an end sectional view of the transfer pipe portion of a gasification quench chamber assembly inFIG. 4 in accordance with an exemplary embodiment of the present invention; -
FIG. 6 depicts a sectional elevation view of a transfer pipe portion of a gasification quench chamber assembly in accordance with an exemplary embodiment of the present invention; and -
FIG. 7 depicts a sectional elevation view of a gasification quench chamber assembly in accordance with another exemplary embodiment of the present invention. - In accordance with the exemplary embodiments disclosed herein, a gasifier having a quench chamber assembly configured to reduce temperature of syngas downstream of a gasification chamber is disclosed. The gasifier includes a quench chamber containing a liquid coolant disposed downstream of the gasification chamber. A syngas generated from the gasification chamber is directed via a dip tube to the quench chamber to contact the liquid coolant and produce a cooled syngas. A baffle is disposed proximate to an exit path of the quench chamber. In some embodiments, a draft tube may be disposed surrounding the dip tube such that an annular passage is formed between the draft tube and the dip tube. The cooled syngas is directed through the annular passage (if present) and impacted against the baffle so as to remove entrained liquid content from the cooled syngas before the cooled syngas is directed through the exit path. In some embodiments, a deflector plate is disposed between the liquid coolant and the exit path of the quench chamber and configured to remove entrained liquid content from the cooled syngas and prevent sloshing of liquid content to the exit path. In some embodiments, the baffle is asymmetric or symmetric, either open or angular, to remove entrained liquid content from the cooled syngas. In other embodiments, the baffle itself can have channels or cut-outs and overlays to remove entrained liquid and prevent sloshing of liquid content to the exit path. In other embodiments only dip tube is present and the annular section is formed between the dip tube and the quench chamber wall. The provision of asymmetric or symmetric shaped baffle, deflector plate, swirl generator, or combinations thereof substantially reduces entrainment of liquid content in the syngas directed through the exit path to the downstream components (e.g., scrubber assembly, etc.). An entrainment mitigation mechanism, or moisture removal device, is provided at, or along, the transfer pipe exiting the quench chamber. Specific embodiments are discussed in greater detail below with reference to
FIGS. 1-7 . - Aspects of the present invention relate to a gasification component, namely, a gasification quench chamber assembly, which includes the quench chamber, proper, and other appurtenances such as the quench chamber exit pipe, or transfer line. Quench is typically presented downstream of the gasification chamber and used to reduce the temperature of the manufactured syngas as well as remove (at least partially) solids/fines. In some embodiments, there may be a radiant syngas cooler located intermediate the gasification chamber and the quench chamber. As is typical, the syngas is introduced into the quench chamber via a dip tube. The quench chamber contains a liquid coolant, which reduces the temperature of the syngas. After quenching, the syngas rises up, due to buoyancy. Other features found in quench chambers include an entrainment baffle(s), or splash plate(s), present near the exit of the dip tub. The purpose of the entrainment baffle(s) is ostensibly to knock off water droplets, which are entrained with the outgoing syngas. As the entrainment baffle(s) is not 100% efficient in removal of the liquid from the syngas, liquid is still present in the syngas exiting the quench chamber via the exit pipe. The amount of fines and liquid entrainment in the outgoing syngas also poses a significant challenge in the instrumentation and/or measuring the amount of liquid getting entrained in the quench chamber exit pipe.
- Aspects of the present invention increase the overall effectiveness and efficiency of the gasification system by improving upon the removal of entrained liquid from the generated syngas. Further aspects of the present invention address improved removal of entrained liquid while reducing manufacturing costs and/or operating expenses. Aspects of the present invention offer a simplified design, which additionally improve the life of the assembly and reliability, availability, and maintenance of the gasification plant.
- The entrainment mitigation mechanisms depicted in
FIGS. 1-7 may be employed separately or in combination with one another. Moreover, as may be appreciated, the relative sizes, shapes, and geometries of the entrainment mitigation mechanisms may vary. The entrainment mitigation mechanisms may be employed along with a quench chamber during the initial manufacturing, or the entrainment mitigation mechanisms may be retrofit to existing quench units. Further, the entrainment mitigation mechanisms may be adjusted based on operational parameters, such as the type of carbonaceous fuel, the system efficiency, the system load, or environmental conditions, among others to achieve the desired amount of flow damping. - Referring to
FIG. 1 depicts an exemplary embodiment of portions of a gasification system in accordance with aspects of the present invention. As shown, a gasification quench chamber assembly, or gasification assembly, 800 comprises aquench chamber 802 and atransfer pipe 870. Thequench chamber 802 is in fluid communication with agasification chamber 900, upstream, andquench chamber 802 is in fluid communication with ascrubber assembly 920, downstream, via thetransfer pipe 870. In embodiments, thetransfer pipe 870 may be additionally in fluid communication with thequench chamber 802 via areturn tube 874. Similarly, in another embodiment, thetransfer pipe 870 may additionally be in fluid communication with a heat source 910 (e.g., gas turbine, etc.) via asupply line 878 as shown inFIG. 7 . - The
quench chamber 802 comprises adip tube 806 which is configured to couple thegasification chamber 900 to thequench chamber 802 and is further configured todirect syngas 1000 from thecombustion chamber 900 to aliquid coolant 804 contained in a portion of thequench chamber 802. Thequench chamber 802 may further include aninlet line 805 for providing any requisiteliquid coolant 804 to thequench chamber 804. By introducing thesyngas 1000 to theliquid coolant 804, thesyngas 1000 is cooled and exits the quench chamber as cooledsyngas 1002 via thetransfer pipe 870 towards thescrubber assembly 920. Upon the cooling of thesyngas 1000 in the quenchchamber 802, slag orfines 810, may precipitate out of thesyngas 1000 thereby settling at the bottom of the quenchchamber 804. The quenchchamber 804 may further comprise at least onebaffle 808 that aids in knocking out and/or off water droplets entrained in the exitingsyngas 1002. - It should be noted that various configurations of quench chamber could be employed without departing from aspects of the present invention. For example, although
FIGS. 1 and 7 depict a quenchchamber 802 having a dip tube-only configuration, the quenchchamber 802 may alternatively employ a dip/draft configuration, a dip only configuration, a dip/draft with a quench ring configuration, and the like. - The
transfer pipe 870 is configured to provide a means for transmitting the cooledsyngas 1002 to thescrubber assembly 920 and other downstream components (not shown). The transfer pipe, or line, 870 further comprises an excess liquid removal device, or entrainment mitigation mechanism, 872 that is configured to further remove excess liquid (e.g., water, etc.) from the cooledsyngas 1002 so that a cooledsyngas 1006, with an even smaller amount of liquid, ultimately is conveyed to thedownstream scrubber assembly 920 and other downstream components. - As shown in
FIG. 1 , the excessliquid removal device 872 employed by aspects of the present invention include one or more of applying a centrifugal action or force to remove excess liquid from the cooledsyngas 1002; and/or perforating at least a portion of thetransfer pipe 870 to provide an egress means for excess liquid (e.g., water droplets) in the cooledsyngas 1002. In any event, excess liquid is effectively removed from the syngas prior to it reaching thescrubber assembly 920, resulting in an improved gasification process. - In an embodiment a water injection line may also be provided, as denoted by 950 and 960. In this manner, water may be added along the
line 870 in one or more locations. For example, as shown, the injection line may be located anterior to the 876 as denoted by 950. The injection line may be located within themoisture removal device 870. The water injection line may be located in either of these locations, or both locations, as well as any location along thetransfer line 870. - Referring to
FIGS. 2 and 3 , an excessliquid removing device 872 that employs perforations is shown. Thetransfer line 870 includes an excessliquid removing device 872 that comprises a plurality ofperforations 880 configured to allow egress of moisture from thetransfer pipe 870. To aid in the removal of moisture from the syngas 1004 asleeve 889, such as a cold-water sleeve, may be provided, wherein thesleeve 889 partially or substantially surrounds a portion of thetransfer pipe 870. Thesleeve 889 may contain a cooling fluid (e.g., water) therein that has a temperature that is less than a temperature of the cooledsyngas 1004 within thetransfer pipe 870. In this manner, thesleeve 889 aids in further condensing moisture in the travellingsyngas 1004 so that the moisture may drop or settle out via the plurality ofperforations 880 and be collected viacollection pipe 882 and returned viareturn line 874 back to the quench chamber 802 (FIG. 1 ). - Clearly other configurations than those depicted in
FIGS. 2 and 3 may be provided without departing from aspects of the present invention. By way of example, and without limitation, other configurations of perforations may be provided. For example, the perforations may have different quantities, shapes, configurations, patterns, and the like, from those shown. Similarly, the sleeve may surround thetransfer line 870 in a different manner. For example, the sleeve may fully or partially surround thetransfer line 870. Similarly, the cooling fluid used in the cooling sleeve may be any suitable fluid that assists in condensing moisture out of thesyngas 1004. - Referring to
FIGS. 4 and 5 , an excessliquid removing device 872 that employs centrifugal force or action is shown. Thetransfer line 870 includes an excessliquid removing device 872 that comprises abaffle 876 or similar means for exerting or employing centrifugal force to thesyngas 1004. Thebaffle 876 may, for example, include one or blades or vanes that are curved or warped in relationship to the direction of travel of thesyngas 1004 through the transfer line 870 (See e.g.,FIG. 5 ). In consort with thebaffle 876, a plurality ofperforations 880 may be located on a wall of thetransfer line 870 thereby providing an egress means for the moisture (e.g., water droplets) that is spun or forced towards the periphery of thetransfer line 870 by the centrifugal force caused by thebaffle 876. As shown, areturn line 874 may be used to return any collected moisture from the perforations. Thereturn line 874 maybe in fluid communication with the quench chamber 802 (FIG. 1 ). - Referring to
FIG. 6 , a cross section elevation view of another embodiment of a excessliquid removing device 2000 is depicted. Themoisture removal device 2000 may comprise apipe 2012 having one or more tees 2010 (e.g., two tees shown in embodiment inFIG. 6 ) extending therefrom. Thepipe 2012 conveysoutgoing syngas 3000 from a quench chamber 802 (FIG. 1 ) towards a scrubber assembly 920 (FIG. 1 ). The one ormore tees 2010 along thepipe 2012 provide a fluid communication connection with anentrainment vessel 2020. Alternatively to havingtees 2010 there may be one or more perforations, openings, and the like, that allow excess moisture to escape from the syngas that is travelling along thepipe 2012. In any event, theentrainment vessel 2020 gathersmoisture 3030 therein and may have a controlled water level. Themoisture 3030 may be continually flushed back to the quenchchamber 802 by awater flow 3015 that is provided into theentrainment vessel 2020 via aninput line 2030. The flushing back to the quenchchamber 802 viareturn line 2035 may be continual or periodic so as to prevent plugging. Theentrainment vessel 2020 may be designed so that any transient excess water flow (i.e., liquid entrainment) may flow back, as denoted by 3020, to the quenchchamber 802 while maintaining an appropriate pressure drop. Thereturn line 2035 may include a raisedloop 2025 having a height, denoted by D, above the water level of theentrainment vessel 2020. The height, D, may be adjustable as required by the particular application in use. In this manner, excess moisture removed from the syngas may be readily removed and returned to the quenchchamber 802 for reuse. - Referring to
FIG. 7 , the excessliquid removal device 872 in another embodiment of the present invention includes any combination of: applying a centrifugal action or force to remove excess liquid from the cooledsyngas 1002; and/or, perforating at least a portion of thetransfer pipe 870 to provide an egress means for excess liquid (e.g., water droplets) in the cooledsyngas 1002; and/or, heating the exiting cooledsyngas 1002 so as to evaporate out moisture droplets held in the exiting cooledsyngas 1002. In any event, excess liquid is effectively removed from the syngas prior to it reaching thescrubber assembly 920, resulting in an improved gasification process. - The centrifugal action or force and perforation embodiments are discussed above, in reference to
FIG. 1 . As shown inFIG. 7 , under another aspect of the present invention the excessliquid removing device 872 may use evaporation or evaporative means to remove moisture from thesyngas 1002. The evaporative means may comprise injecting a fluid 912 at the existingsyngas 1004, wherein the fluid 912 has a higher temperature than the temperature of the exitingsyngas 1002, thereby aiding in evaporating at least a portion of the remaining moisture in the existingsyngas 1002. In this manner, additional moisture is removed from the existingsyngas 1002. As shown, the fluid 912 may comprise injecting, via aninjection line 878, a hot syngas provided from aheat source 910 or the like. In an embodiment, the suppliedhot syngas 912 is supplied from aheat source 910 that may be a gas turbine, a syngas cooler, a gasifier, and the like. - In accordance with one exemplary embodiment of the present invention, a gasification assembly comprises a quench chamber having a liquid coolant disposed therein; a dip tube configured to couple a combustion chamber to the quench chamber and configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas; and a transfer pipe in fluid communication with the cooled syngas, configured to transfer the cooled syngas to a downstream scrubber component, wherein the transfer pipe further comprises an excess moisture removal device, configured to remove moisture from the cooled syngas.
- This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
- While only certain features of the invention have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Claims (12)
1. A gasification assembly comprising:
a quench chamber having a liquid coolant disposed therein;
a dip tube configured to couple a combustion chamber to the quench chamber and configured to direct syngas from the combustion chamber to the liquid coolant and produce a cooled syngas; and
a transfer pipe in fluid communication with the cooled syngas, configured to transfer the cooled syngas to a downstream scrubber component, wherein the transfer pipe further comprises an excess moisture removal device, configured to remove moisture from the cooled syngas.
2. The gasification assembly of claim 1 , wherein the excess moisture removal device is configured to employ centrifugal action to remove moisture from the cooled syngas.
3. The gasification assembly of claim 2 , wherein the excess moisture removal device comprises a baffle.
4. The gasification assembly of claim 1 , further comprising a return line in fluid communication between the moisture removal device and the quench chamber configured to return a portion of the removed moisture to the liquid coolant.
5. The gasification assembly of claim 1 , wherein the excess moisture removal device injects a fluid at the exiting syngas, wherein the fluid has a higher temperature than the exiting syngas, thereby evaporating a portion of the moisture.
6. The gasification assembly of claim 5 , wherein the fluid is a hot syngas.
7. The gasification assembly of claim 6 , wherein the fluid is provided from a gas turbine.
8. The gasification assembly of claim 1 , wherein the excess moisture removal device comprises a plurality of perforations configured to allow egress of the removed moisture from the transfer pipe.
9. The gasification assembly of claim 8 , further comprising a return line in fluid communication between the plurality of perforations and the quench chamber configured to return a portion of the removed moisture to the liquid coolant.
10. The gasification assembly of claim 8 , wherein the plurality of perforations are in fluid communication with a reservoir.
11. The gasification assembly of claim 8 , further comprising a cooling device in fluid communication with one of the transfer pipe and the excess moisture removal device, configured to condense moisture from the cooled syngas.
12. The gasification assembly of claim 11 , wherein the cooling device comprises a sleeve partially surrounding a portion of the transfer pipe, further wherein the sleeve has a fluid therein having a temperature less than a temperature of the cooled syngas in the transfer pipe.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/957,266 US20120131852A1 (en) | 2010-11-30 | 2010-11-30 | Moisture removal for gasification quench chamber assembly |
AU2011253573A AU2011253573A1 (en) | 2010-11-30 | 2011-11-21 | Moisture removal for gasification quench chamber assembly |
CN201110403227.7A CN102559281B (en) | 2010-11-30 | 2011-11-30 | Moisture removal for gasification quench chamber assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US12/957,266 US20120131852A1 (en) | 2010-11-30 | 2010-11-30 | Moisture removal for gasification quench chamber assembly |
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US20120131852A1 true US20120131852A1 (en) | 2012-05-31 |
Family
ID=46125694
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US12/957,266 Abandoned US20120131852A1 (en) | 2010-11-30 | 2010-11-30 | Moisture removal for gasification quench chamber assembly |
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US (1) | US20120131852A1 (en) |
CN (1) | CN102559281B (en) |
AU (1) | AU2011253573A1 (en) |
Cited By (3)
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US8673036B2 (en) | 2009-06-30 | 2014-03-18 | General Electric Company | Quench chamber assembly for a gasifier |
EP3505602A1 (en) * | 2017-12-29 | 2019-07-03 | Meva Energy AB | Gasification system |
CN114933912A (en) * | 2022-06-24 | 2022-08-23 | 山东天景工程设计有限公司 | Device for reducing bias current in heat exchanger utilizing waste heat of coke oven crude gas |
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US20090101598A1 (en) * | 2007-10-23 | 2009-04-23 | James Scott Kain | Methods for removing suspended solids from a gasification process stream |
US20110016787A1 (en) * | 2009-07-27 | 2011-01-27 | General Electric Company | Control system and method to operate a quench scrubber system under high entrainment |
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CN100408631C (en) * | 2006-10-27 | 2008-08-06 | 北京工业大学 | Improving method for rigid chain liquid crystal polymer and flexible chain nylon compatibility |
CN101285005B (en) * | 2008-05-30 | 2011-07-27 | 中国五环工程有限公司 | Chill device of water/gas mixed full-chilled dry powder fuel gasification process |
-
2010
- 2010-11-30 US US12/957,266 patent/US20120131852A1/en not_active Abandoned
-
2011
- 2011-11-21 AU AU2011253573A patent/AU2011253573A1/en not_active Abandoned
- 2011-11-30 CN CN201110403227.7A patent/CN102559281B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5909654A (en) * | 1995-03-17 | 1999-06-01 | Hesboel; Rolf | Method for the volume reduction and processing of nuclear waste |
US20090101598A1 (en) * | 2007-10-23 | 2009-04-23 | James Scott Kain | Methods for removing suspended solids from a gasification process stream |
US20110016787A1 (en) * | 2009-07-27 | 2011-01-27 | General Electric Company | Control system and method to operate a quench scrubber system under high entrainment |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8673036B2 (en) | 2009-06-30 | 2014-03-18 | General Electric Company | Quench chamber assembly for a gasifier |
US8758458B2 (en) | 2009-06-30 | 2014-06-24 | General Electric Company | Quench chamber assembly for a gasifier |
EP3505602A1 (en) * | 2017-12-29 | 2019-07-03 | Meva Energy AB | Gasification system |
WO2019129490A1 (en) * | 2017-12-29 | 2019-07-04 | Meva Energy Ab | Gasification system |
CN114933912A (en) * | 2022-06-24 | 2022-08-23 | 山东天景工程设计有限公司 | Device for reducing bias current in heat exchanger utilizing waste heat of coke oven crude gas |
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AU2011253573A1 (en) | 2012-06-14 |
CN102559281B (en) | 2015-05-06 |
CN102559281A (en) | 2012-07-11 |
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