Petroleum Coke and Coal Start-Up Testing in Bubbling Fluidized Bed Combustors

1997 ◽  
Vol 119 (2) ◽  
pp. 96-102 ◽  
Author(s):  
E. J. Anthony ◽  
K. Anderson ◽  
R. Carson ◽  
I. T. Lau
Keyword(s):  
Fluidized Bed ◽  
Petroleum Coke ◽  
Bituminous Coal ◽  
Volatile Content ◽  
Fluidized Bed Combustion ◽  
Bench Scale ◽  
Start Up ◽  
Bubbling Fluidized Bed ◽  
Tennessee Valley ◽  
Start Ups

Bench-scale and 160 MWe demonstration tests were conducted for petroleum coke and high volatile bituminous coal blends. The bench-scale apparatus was a 100-mm-dia reactor located at the Canada Centre for Mineral and Energy Technology (CANMET), Energy Research Laboratories. The demonstration tests were conducted on the Tennessee Valley Authority’s (TVA) 160 MWe Shawnee Atmospheric Fluidized Bed Combustion (AFBC) Unit located at Paducah, Kentucky. Five and ten percent nominal volatile petroleum cokes were tested in the bench-scale unit. In addition, for the five-percent petroleum coke blends of 25, 50, and 75-percent petroleum coke, with the balance coal, were also examined at the bench scale. Eight start-up tests have been conducted with 50 percent blend of green delayed petroleum coke at the Shawnee AFBC unit. The bench-scale tests revealed that the volatile content in the petroleum coke was the primary factor affecting start-up. The tests showed that the volatile content from the coke and coal ignited at similar times; the char required longer to ignite. Bench-scale tests showed adequate start-up performance with blends up to 75 percent petroleum coke. Cold start-ups were conducted at the Shawnee AFBC Unit with 7 to 10 percent volatile green delayed petroleum coke. In all the start-ups, the operating temperature of 816°C was reached within 15 min of introducing the petroleum coke blend; this is similar to when high volatile bituminous coal was used. One start-up required a longer time because limestone had to be used to generate the bed. Local hot spots (982°C) were noticed in several start-ups for short periods, but subsided when additional air was supplied. Although more difficult to control, TVA routinely starts the Shawnee AFBC Unit with 50 percent shot petroleum coke and 50 percent high volatile bituminous coal.

A Simulation Study for Fluidized Bed Combustion of Petroleum Coke With CO2 Capture

2003 ◽  
Author(s):  
Jinsheng Wang ◽  
Edward J. Anthony ◽  
J. Carlos Abanades
Keyword(s):  
Power Generation ◽  
Fluidized Bed ◽  
Petroleum Coke ◽  
Co2 Capture ◽  
Low Cost ◽  
Volatile Content ◽  
Fluidized Bed Combustion ◽  
High Carbon ◽  
Overall Efficiency ◽  
Fluidized Bed Combustor

Petroleum coke is regarded as a difficult fuel because of its high sulphur content and low volatile content. However, its low price and increased production, means that there is a powerful economic stimulus to use it for power generation. In this work, a process simulation has been performed as part of a feasibility study on the utilization of petroleum coke for power generation with low-cost CO2 capture. The proposed system employs a pressurized fluidized bed combustor and a calciner. In the combustor itself, the petroleum coke is burned and most of the CO2 generated is captured by a CaO sorbent under pressurized condition to form CaCO3. The CaCO3 is transported into the calciner where limited proportion of the petroleum coke is burned with pure O2, and calcines the spent sorbent back into CaO and CO2. A nearly pure CO2 stream is obtained from the calciner for subsequent disposal or utilization. The predicted overall efficiency of the combustion is near 40%. The proposed system would also be suitable for firing other high carbon and low ash fuel, such as anthracite.

Performance Characteristics of Concrete Produced with Fluidized Bed Combustion Ash Residue

1988 ◽  
Vol 136 ◽  
Author(s):  
A. E. Bland ◽  
C. E. Jones ◽  
J. G. Rose ◽  
J. L. Harness
Keyword(s):  
Fluidized Bed ◽  
Performance Characteristics ◽  
Strength Development ◽  
Fluidized Bed Combustion ◽  
Portland Cement Concrete ◽  
Conventional Concrete ◽  
Setting Times ◽  
Pulverized Fuel ◽  
Tennessee Valley ◽  
Pulverized Fuel Ash

ABSTRACTOver the last five years, the Kentucky Energy Cabinet (KEC) and the Tennessee Valley Authority (TVA) have developed and demonstrated the production of concrete from atmospheric fluidized bed combustion (AFBC) spent bed (SB) ash, and pulverized fuel ash (PFA). This AFBC concrete contains no cement and relies on the reaction of residual lime in the SB ash to react with the pozzolan PFA to form cementitious products. The SB ash is prehydrated in order to reduce exothermic lime hydration reactions and minimize molar volume expansion. Laboratory tests were conducted to establish the performance characteristics of AFBC concretes relative to conventional concrete. AFBC concretes exhibit slower strength gain characteristics, but long term (60 day), unconfined compressive strengths of 5,000 psi have been documented. This slow strength development is typical of pozzolanic concretes. AFBC concrete is more flexible and less brittle than conventional Portland cement concrete, as evidenced by its much lower modulus of elasticity. Setting times for AFBC concretes are extended, requiring the use of accelerators under certain applications. Field demonstrations of the AFBC concretes in ready mix concrete, masonry units, and road base applications have indicated excellent workability and finishing characteristics and confirm the laboratory performance characteristics.The paper describes the results of the testing program with emphasis on the ash chemistry/conditioning, the performance characteristics and field demonstrations.

scholarly journals Bubbling fluidized bed combustion of Syncrude coke

1987 ◽  
Author(s):  
E J Anthony ◽  
H A Becker ◽  
R K Code ◽  
R W McCleave ◽  
J R Stephenson
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Combustion ◽  
Bubbling Fluidized Bed

Fate of bromine and chlorine in bubbling fluidized bed combustion – Formation of alkali halide aerosols

Fuel ◽  
2014 ◽  
Vol 128 ◽  
pp. 390-395 ◽  
Author(s):  
Hao Wu ◽  
Tor Laurén ◽  
Patrik Yrjas ◽  
Pasi Vainikka ◽  
Mikko Hupa
Keyword(s):  
Fluidized Bed ◽  
Alkali Halide ◽  
Fluidized Bed Combustion ◽  
Bubbling Fluidized Bed

CO2 methanation in a bench-scale bubbling fluidized bed reactor using Ni-based catalyst and its exothermic heat transfer analysis

Energy ◽  
2021 ◽  
Vol 214 ◽  
pp. 118895
Author(s):  
Hyungseok Nam ◽  
Jung Hwan Kim ◽  
Hana Kim ◽  
Min Jae Kim ◽  
Sang-Goo Jeon ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Heat Transfer Analysis ◽  
Co2 Methanation ◽  
Bench Scale ◽  
Bubbling Fluidized Bed

Rice husk bubbling fluidized bed combustion for amorphous silica synthesis

2016 ◽  
Vol 4 (2) ◽  
pp. 2278-2290 ◽  
Author(s):  
Gabriel M. Faé Gomes ◽  
Caterina Philipssen ◽  
Eduardo K. Bard ◽  
Leandro Dalla Zen ◽  
Guilherme de Souza
Keyword(s):  
Fluidized Bed ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Fluidized Bed Combustion ◽  
Bubbling Fluidized Bed ◽  
Silica Synthesis

A Method for Reduction in the Start-Up Time of a Bubbling Bed Boiler Combustor

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
Vijay Jain ◽  
Prabir Basu ◽  
Dominic Groulx
Keyword(s):  
Fluidized Bed ◽  
Internal Heat ◽  
Peak Temperature ◽  
Fuel Oil ◽  
Start Up ◽  
Bubbling Fluidized Bed ◽  
Bed Materials ◽  
The Mean ◽  
Rate Of Heating ◽  
Good Agreement

A study on the heating of inert bed solids in a bubbling fluidized bed by means of an over-bed start-up oil burner is presented in this paper. Experiments carried out in a 160 mm diameter bed shows that the bed heats up nonlinearly with time. The rate of heating and the peak temperature reached by the bed solids depend on the bed depth, the mean particle size, and the superficial velocity through the bed. It was further noted that premixing a certain amount of biomass with the inert bed solids accelerates the rate of heating, as well as increase the peak temperature attained. The internal heat generation in the biomass is found to start at temperatures as low as 200°C. Thus, premixing some biomass with inert bed materials could reduce the combustion start-up time of a fluidized bed boiler, reducing at the same time the start-up cost by saving on consumption of expensive fuel oil in the burner. Experimental data in the present laboratory-scale unit shows good agreement with those obtained earlier in an industrial fluidized bed tested with waste-coal.

Fluidized bed combustion systems for power generation and other industrial applications

2003 ◽  
Vol 217 (1) ◽  
pp. 9-18 ◽  
Author(s):  
A. J. Minchener
Keyword(s):  
Power Generation ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Industrial Applications ◽  
Coal Waste ◽  
Fluidized Bed Combustion ◽  
Bubbling Fluidized Bed ◽  
The Status ◽  
Market Opportunities ◽  
Derivatives Of

Fluidized bed combustion (FBC) in various forms has been used to burn all types of coal, coal waste and a wide variety of other fuels, either singly or cofired with coal. FBC boilers are currently available commercially in the capacity range from 1 MWth to over 250 MWe and continue to be adopted for a variety of commercial, industrial and power generation applications. There are two main derivatives of FBC, namely bubbling fluidized bed combustion (BFBC) and circulating fluidized bed combustion (CFBC). There are also several hybrid systems and pressurized versions of both BFBC and CFBC. The status of these different systems, with some now fully commercial and some still under development, is described, with projections made for future development requirements and market opportunities.

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