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Optimization of Solid Circulation Rate in Compartmented
The present paper reports the optimization of solid circulation rate (SCR) in Compartmented Fluidized Bed Gasifier (CFBG), an indirectly heated fluidized bed that incorporates two sets of v-valves and risers to control the solid circulation across the two compartments, i.e. combustor and gasifier of a pilot plant scale (the height and ID are 1.8m and 0.66m respectively).
Environmental Assessment Data Base for High-Btu Gasification
The gases then pass through an indirect cooler and demister before being flared. 2.2 BGC/Lurgi Pilot Plant - Flow diagram, see Figure A-5 . 2.2.1 Gasifier (3 4} Equipment^ ' • Construction: vertical, cylindrical steel pressure vessel with refractory lining in lower half of gasifier.
Technical and economic assessment of - Stanford University
The gasification system used for this study was the Battelle Columbus Laboratory (BCL) indirectly heated gasifier. The heat necessary for the endothermic gasification reactions is supplied by circulating sand from a char combustor to the gasification vessel.
(PDF) Indirectly heated fluidized bed biomass gasification
A simpler and potentially less costly indirectly heated gasifier has been developed at Iowa State University (Stobbe et al., 1996). The gasifier consists of a fluidized bed reactor containing a thermal ballasting system based on high temperature phase change material (PCM).
Biomass and Municipal Solid Waste (MSW) Gasification | netl
Indirectly Heated gasifiers, which can be entrained, fluidized, or circulating fluidized bed gasifiers, are at an early stage of development and have not been tested over a wide range for application suitability. In fact, as of June 2002, these units had only been tested at atmospheric pressure.
high automatic gasification power plant on sale/wholesale
high automatic gasification power plant on sale is the process of converting biomass raw materials into gas in the pyrolysis gasification furnace, and the gas is purified and entered into the gas generator set for power generation.
Techno-economic Analysis for the Thermochemical Conversion of
The indirectly-heated gasifier comprises both a gasifier and a combustor. Dried wood is fed into a low-pressure, indirectly-heated, entrained flow gasifier. Steam extracted from steam cycle is sent to the gasifier at a flow rate of 0.4 lb of steam/lb of dry wood to fluidize the bed and to supply a portion of the heat required for the gasifier.
Types of Gasifiers - SynGas Technology
Hybrid Gasifier. Gasifier with Reformer. 1. Indirect Gasification (shown in Figure 1) refers to the use of pipes, or heat exchangers, typically heated to 1700 F or higher within the reactor. Hot gas is passed inside of the pipes, which maintains the reactor at temperatures of approximately 1500-1600 F.
II.B.1 Indirectly Heated Gasification of Biomass to Produce
In the model, wood is gasified using an indirectly-heated, entrained-flow gasifier. Indirect heat is supplied by adding hot olivine to the gasifier. After gasification, olivine and char are separated from the syngas using cyclones. The char, mixed with olivine, is then combusted to add heat to the olivine, which is
A 1-dimensional model of indirect biomass gasification in a
combustor). It thereby influences the share of char conversion taking place in the gasifier respectively combustor and the overall performance of the process. The model presented here is the first milestone in the development of a 3-dimensional model to be used as a tool in the optimisation and upscaling of the indirect gasification process.
Indirectly heated fluidized bed biomass gasification using a
Dec 31, 1998 · The objective of this study is to improve the heating value of gas produced during gasification of biomass fuels using an indirectly heated gasifier based on latent heat ballasting. The latent heat ballast consists of lithium fluoride salt encased in tubes suspended in the reactor. The lithium fluoride has a melting point that is near the desired gasification temperature. With the ballast a
Indirectly Heated Biomass Gasification - Energy
Gasifier Gas Heating Value Btu/lb Wet: 4,759 HHV 4,401 LHV Dry: 8,019 HHV 7,416 LHV Wet: 4,283 HHV 3,899 LHV Dry: 6,104 HHV 5,557 LHV Gasifier Char Yield, lb/lb of dry feed 0.22 0.10 Gasifier Efficiency 72.1% HHV 71.8% LHV 70.8% HHV 69.3% LHV Overall Process Hydrogen Production
Indirectly heated biomass gasification using a latent heat
Made available by U.S. Department of Energy Office of Scientific and Technical Information
Coal gasification by indirect heating in a single moving bed
Oct 19, 2015 · Figure 1. Schematic of the proposed gasifier with indirect heat transfer through a bayonet Figure S1. Simplified process scheme of indirect gasification using the flue gases from the partial product gas combustion as the heat source Figure S2.
CiteSeerX — Leveling Intermittent Renewable Energy Production
Direct leveling of intermittent renewable electricity production was proposed utilizing either an indirectly heated biomass gasifier or a directly heated biomass gasifier. The indirect gasification concepts studied were found to be cost competitive in cases where value is placed on controlling carbon emissions.