Dust Removal Concepts for Pressurized Fluidized Bed Systems

1982 ◽  
Author(s):  
R. R. Boericke ◽  
W. E. Moore
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Fluidized Bed ◽  
Combined Cycle ◽  
Dust Removal ◽  
Granular Bed ◽  
Bag Filter ◽  
Development Status ◽  
Reference Plant ◽  
System Designs

Improved high-temperature (1700°F, 925°C) dust removal concepts are being developed for pressurized fluidized bed combined cycle power generation. Recent results on cyclones, electrocyclones, an acoustic agglomerator, a ceramic bag filter, and an electrostatic granular bed filter are reviewed. The development status of each device is described, and the relative merits of each concept are discussed. System designs for employing each of the dust removal concepts in a 650 MWe PFB reference plant are presented in order to illustrate the application of the devices, and approximate economic comparisons are made for this application.

scholarly journals Experimental study on production and emission characteristics of PM2.5 from industrial fluidized bed boilers

2020 ◽  
Vol 24 (5 Part A) ◽  
pp. 2665-2675
Author(s):  
Songsong Zhang ◽  
Qian Du ◽  
Guoli Qi
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Mass Concentration ◽  
Great Influence ◽  
Chemical Properties ◽  
Dust Removal ◽  
Dust Collector ◽  
Bag Filter ◽  
Physical And Chemical ◽  
Fluidized Bed Boilers

Particle size distributions, concentrations, morphological characteristics, and elemental compositions of eight fluidized bed boilers with different capacities and different dust collectors were determined experimentally. The PM2.5 particle concentration and mass concentration were monitored in real-time before and after the boiler dust collector by electric low pressure impactor, and the physical and chemical properties of PM2.5 were analyzed by membrane sampling. We found that the PM2.5 particle concentration produced by industrial fluidized bed boilers displayed bimodal distributions, peaking at 0.2 ?m and 0.76 ?m, the formed mechanism of these two parts particles is vaporization-condensation of mineral matter and residual ash particles and the adsorbent wear or tear. Mass concentration exhibits a single peak characteristic with a peak at 0.12 ?m. The removal efficiency for PM2.5 of dust collectors varies with different dust removal mechanisms. The electrostatic precipitator and bag filter have high dust removal efficiency, and the water film dust collector has low dust removal efficiency. The normal operation of the bag filter has a great influence on the dust removal efficiency. The physical and chemical properties of PM2.5 showed that the single-particle morphology was mainly composed of irregular particles, containing a small amount of solid spherical particles and more agglomerates. The content of Si and Al in PM2.5 elemental analysis is the highest, which decreases after a dust collector. Some fluidized bed boilers use desulfurization in the furnace, which has great influence on the mass concentration of Ca and S elements, and the lowest Hg content in trace elements, about a few ppm. <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/TSCI200901242E">10.2298/TSCI200901242E</a><u></b></font>

scholarly journals Second Round of Studies on Advanced Power Generation Based on Combined Cycle Using a Single High-Pressure Fluidized Bed Boiler and Consuming Biomass

2012 ◽  
Vol 6 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Marcio L. de Souza-Santos ◽  
Juan Villanueva Chavez
Keyword(s):  
Power Generation ◽  
Fluidized Bed ◽  
Flue Gas ◽  
Gas Turbines ◽  
Sugar Cane Bagasse ◽  
Combined Cycle ◽  
Present Stage ◽  
Added Water ◽  
Preliminary Study ◽  
Process Simulator

Following a preliminary study of power generation processes consuming sugar-cane bagasse; this second round indicates the possibility of almost doubling the current efficiency presently obtained in conventional mills. A combined cycle uses highly pressurized fluidized bed boiler to provide steam above critical temperature to drive steam-turbine cycle while the flue-gas is injected into gas turbines. The present round also shows that gains over usual BIG/GT (Biomass In-tegrated Gasification/Gas Turbine) are very likely mainly due to the practicality of feeding the biomass as slurry that can be pumped into the pressurized boiler chamber. Such would avoid the cumbersome cascade feeding of the fibrous bio-mass, usually required by other processes. The present stage assumes slurry with 50% added water. Future works will concentrate on thicker slurries, if those could be achieved. All studies apply a comprehensive simulator for boilers and gasifiers [CSFMB™ or CeSFaMB™] and a process simulator (IPES) to predict the main features of the steam and gas tur-bine branches.

Advanced Power Generation System and Related Thermal Engineering Problems

2011 ◽  
Author(s):  
Mamoru Ozawa ◽  
Ryosuke Matsumoto ◽  
Hisashi Umekawa
Keyword(s):  
Power Generation ◽  
Fluidized Bed ◽  
Combined Cycle ◽  
Thermal Engineering ◽  
Integrated Gasification Combined Cycle ◽  
Gasification Process ◽  
Coal Technology ◽  
The Government ◽  
Integrated Gasification ◽  
Typical Component

Based on the increased attention to “energy security” and “sustainable development”, it is essential to promote clean use of coal as a fuel. Typical advanced technologies are demonstrated by the pressurized fluidized-bed combined cycle (PFBC) and integrated gasification combined cycle (IGCC). Focusing mainly on these two examples as the advanced energy conversion technology, related problems are reviewed. The PFBC technology is a composite technology of conventional fluidized bed and combined-cycle, in which ash, being a typical component of coal, is not melted but is removed mainly in the fluidized bed. On the other hand, the IGCC is much more complicated and ash removal is conducted by melting in the combustor. Heat released there is utilized for gasification process in the reductor installed just downstream the combustor. Even though both systems have very high potential for clean and efficient use of coal, the commercial plants are limited in a very small number or at the stage of just a demonstration plant. To extend and develop clean-coal technology in the electric power generation market, a strategy of the government on the energy technology as well as the long-term competition in the market are indispensable, otherwise related technologies as well as the engineers involved will be lost.

scholarly journals Feasibility study on HYSOL CSP

2016 ◽  
Vol 13 (1) ◽  
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Natural Gas ◽  
Economic Analysis ◽  
Molten Salt ◽  
Gas Turbines ◽  
Combined Cycle ◽  
Economic Feasibility ◽  
Solar Irradiation ◽  
Firm Power

Concentrating Solar Power (CSP) plants utilize thermal conversion of direct solar irradiation. A trough or tower configuration focuses solar radiation and heats up oil or molten salt that subsequently in high temperature heat exchangers generate steam for power generation. High temperature molten salt can be stored and the stored heat can thus increase the load factor and the usability for a CSP plant, e.g. to cover evening peak demand. In the HYSOL concept (HYbrid SOLar) such configuration is extended further to include a gas turbine fuelled by upgraded biogas or natural gas. The optimised integrated HYSOL concept, therefore, becomes a fully dispatchable (offering firm power) and fully renewable energy source (RES) based power supply alternative, offering CO2-free electricity in regions with sufficient solar resources. The economic feasibility of HYSOL configurations is addressed in this paper. The analysis is performed from a socio- and private- economic perspective. In the socio-economic analysis, the CO2 free HYSOL alternative is discussed relative to conventional reference firm power generation technologies. In particular the HYSOL performance relative to new power plants based on natural gas (NG) such as open cycle or combined cycle gas turbines (OCGT or CCGT) are in focus. In the corporate-economic analysis the focus is on the uncertain technical and economic parameters. The core of the analyses is based on the LCOE economic indicator. In the corporate economic analysis, NPV and IRR are furthermore used to assess the feasibility. The feasibility of renewable based HYSOL power plant configurations attuned to specific electricity consumption patterns in selected regions with promising solar energy potentials are discussed.

The Battle of CO2 Capture Technologies

2010 ◽  
Author(s):  
Ram G. Narula ◽  
Harvey Wen
Keyword(s):  
Climate Change ◽  
Power Generation ◽  
Co2 Capture ◽  
Flue Gas ◽  
Carbon Capture ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Development Status ◽  
Combustion Technology ◽  
Carbon Dioxide Co2

Coal is an abundant, widespread, cheap energy source and contributes to 39% of the world’s electric power generation. Coal releases large amounts of carbon dioxide (CO2), which is believed to play a major role in global warming and climate change. To de-carbonize power generation, three distinct carbon capture technologies are in varying stages of development. These include pre-combustion carbon capture through the use of integrated coal gasification combined cycle (IGCC), post-combustion carbon capture from a pulverized-coal (PC)-fired power plant flue gas using monoethanolamine (MEA) or ammonia (NH3), and oxy-combustion technology. In the latter technology, oxygen is first separated from nitrogen in an air separator unit and used for combustion of coal in a conventional PC boiler. With oxy-combustion technology, the resulting flue gas is predominantly CO2, which makes CO2 capture easier than in the PC-MEA case. This paper discusses the development status as well as the advantages, limitations, performance and economics of each technology in regard to the capture and non-capture cases.

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