Conceptual Design of an Ultra-Dense Phase Injector and Feed System

Sprouse, Ken; Widman, Fred; Darby, Alan

doi:10.2172/962692

Cited by 3 publications

(12 citation statements)

References 2 publications

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“…The GTI compact gasifier has been designed to process 1500 to 3000 TPD of dried coal . In this case study, the performance of a similar gasifier is compared at two fuel capacities: 1500 (lower scale) and 3000 (higher scale) TPD which requires 18 and 36 fuel injector nozzles, respectively .…”

Section: Results and Discussion: Case Studiesmentioning

confidence: 99%

“…As the residence time of the particles becomes smaller, poor mixing may reduce the efficiency of the system. An initial design requirement for GTI’s compact gasifier feed system was a relative standard deviation (RSD) of less than 2% for the fuel split nonuniformity . However, testing of GTI’s feed system indicated a RSD of 4.5% and 10% for 6 and 18 element injectors, respectively .…”

Section: Results and Discussion: Case Studiesmentioning

confidence: 99%

“…This increases the mixing of fuel and oxidizing agents (i.e., oxygen and steam) and reduces recirculation within the gasifier. The feed system for GTI’s compact gasifier includes a solid pump which takes dried pulverized fuel at atmospheric pressure and delivers it to the multielement injector at pressures of up to 69 bar . As shown in Figure , each feed nozzle has a fuel injection tube (surrounded by six oxygen/steam impinging orifices) that is sized to inject up to 100 TPD of dry fuel to the gasifier .…”

Section: Gasification Systemmentioning

confidence: 99%

“…As shown in Figure , each feed nozzle has a fuel injection tube (surrounded by six oxygen/steam impinging orifices) that is sized to inject up to 100 TPD of dry fuel to the gasifier . Therefore, the commercial-scale gasifier requires 18 and 36 nozzles to inject fuel for the capacities of 1200–1500 TPD and 2400–3000 TPD, respectively Figure illustrates the nozzle configuration proposed for a design with 36 injectors .…”

Section: Gasification Systemmentioning

confidence: 99%

“…The feed system for GTI's compact gasifier includes a solid pump which takes dried pulverized fuel at atmospheric pressure and delivers it to the multielement injector at pressures of up to 69 bar. 19 As shown in Figure 1, each feed nozzle has a fuel injection tube (surrounded by six oxygen/steam impinging orifices) that is sized to inject up to 100 TPD of dry fuel to the gasifier. 20 Therefore, the commercial-scale gasifier requires 18 and 36 nozzles to inject fuel for the capacities of 1200−1500 TPD and 2400−3000 TPD, respectively.…”

Section: Gasification Systemmentioning

confidence: 99%

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Reduced-Order Modeling of a Commercial-Scale Gasifier Using a Multielement Injector Feed System

Sahraei

Duchesne

Boisvert

et al. 2017

Ind. Eng. Chem. Res.

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This study presents a reduced order model (ROM) that describes the behavior of a commercial-scale short-residence gasifier which uses a multielement injector feed system. The state-of-the-art injection technology disperses the feed across the crosssection of the gasifier to enhance the mixing efficiency, thereby allowing a reduction in the reactor size and capital cost. A reactor network is integrated into the ROM to capture the laminar and mixing zones formed by each nozzle and subsequently the merging point of the multiphase flow coming from all of the nozzles. The results of the ROM are in reasonable agreement with the limited data reported for a short-residence time commercial-scale gasifier, that is, residence time, carbon conversion, and cold gas efficiency. Moreover, the performance of the gasifier is examined under changes in the operating pressure, number of injectors, flow nonuniformity, and plugging in the fuel's injection tubes. The ROM provides valuable insights on the operation of the commercial-scale gasifier and potential safety concerns that can be used to design suitable and safe operation policies for the system. Furthermore, sensitivity analyses on the model, design, and operational parameters are performed to assess the suitability of the model assumptions and identify the most important factors influencing carbon conversion, particle residence time, and temperature profiles.

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Section: Results and Discussion: Case Studiesmentioning

confidence: 99%

Section: Results and Discussion: Case Studiesmentioning

confidence: 99%

Section: Gasification Systemmentioning

confidence: 99%

Section: Gasification Systemmentioning

confidence: 99%

Section: Gasification Systemmentioning

confidence: 99%

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