Work of JSC “VTI” in the Area of Fluidized Beds for Efficient and Environmentally-Friendly Use of Solid Fuels

2021 ◽  
Author(s):  
G. A. Ryabov ◽  
O. M. Folomeev ◽  
D. S. Litun
Keyword(s):  
Fluidized Beds ◽  
Environmentally Friendly ◽  
Solid Fuels

A Novel Technique for “In-Situ” Characterization of Devolatilization Rate of Solid Fuels in Fluidized Beds

2005 ◽  
Author(s):  
R. Solimene ◽  
R. Chirone ◽  
A. Marzocchella ◽  
P. Salatino
Keyword(s):  
Fluidized Bed ◽  
Fluidized Beds ◽  
Volatile Matter ◽  
Solid Fuels ◽  
In Situ Characterization ◽  
Flow Restriction ◽  
History Of ◽  
Fuel Particles

The characterization of volatile matter (VM) emission from solid fuel particles during fluidized bed combustion/gasification is relevant to reactor performance influencing the fate of VM as it results from competing phenomena of release, mixing/segregation and burn-out. The rate and the time-history of volatile matter release strongly affect axial segregation of fuel particles in the bed, favoring the establishment of the stratified combustion regime. On the other hand, the comparison between the devolatilization and radial solids mixing time scales affects the radial distribution of volatile matter across the reactor. Short devolatilization times determine VM release localized near feeding point. The knowledge of devolatilization kinetics, as determined by thermogravimetric analysis, does not take into account key process phenomena such as the effective time-temperature history of the devolatilizing particle. A novel and easy-to-use diagnostic technique for “in-situ” characterization of the devolatilization rate of fuel particles in gas fluidized beds is proposed in the present paper. It is based on the time-resolved measurement of pressure in a bench scale fluidized bed reactor equipped with a calibrated flow restriction at the exhaust. The procedure consists of the injection of a single fuel particle (or small batches of multiple particles) and continuous monitoring of the pressure in the reactor. The bed was kept at a constant temperature by external heating and fluidized with nitrogen. Gas pressure inside the reactor increases during devolatilization as a consequence of the increased flow rate, due to the emission of volatile matter, across the calibrated flow restriction at the exhaust. Experimental data are analyzed in the light of a model of the experiment based on the transient mass balance on the reactor volume referred to the fluidizing gas and to the volatile matter. The comparison between experimental pressure time series and model computations enables the characterization of the kinetic parameters of devolatilization rate for samples of different coals as well as of non-fossil solid fuels.

NO formation tendency characterization for solid fuels in fluidized beds

Fuel ◽  
2013 ◽  
Vol 108 ◽  
pp. 238-246 ◽  
Author(s):  
Jukka Konttinen ◽  
Sirpa Kallio ◽  
Mikko Hupa ◽  
Franz Winter
Keyword(s):  
Fluidized Beds ◽  
Solid Fuels ◽  
No Formation

scholarly journals ANALISIS POTENSI BRIKET BIO-ARANG SEBAGAI SUMBER ENERGI TERBARUKAN

2021 ◽  
Vol 10 (2) ◽  
pp. 147
Author(s):  
Widya Fitriana ◽  
Wetri Febrina
Keyword(s):  
Swot Analysis ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Data Retrieval ◽  
Clean Energy ◽  
Added Value ◽  
Solid Fuels ◽  
Production Data ◽  
Internal Factors ◽  
Small Industry

The research aimed to examine the potential of bio-charcoal briquettes as solid fuel using a SWOT analysis approach, by comparing them with non-briquette solid fuels. The SWOT method examines internal factors (IFAS) and external factors (EFAS). The research was conducted at a wood charcoal produces located at Dumai City, Riau. Data retrieval was carried out by means of observation and interview with the owner and workers. Including production data, marketing, problems faced during production, promotion and sale, product added value, product shortages and weaknesses, competitor data and opportunities in business development. The results of this research indicated that the advantages of briquette products was renewable, cheap, raw materials environmentally friendly, ease of packaging, cleanliness in the production process and efficiency in transportation. The disadvetages was less popular, requires a combustion furnace and fluctuating heat. The ooportunity was that the need for charcoal continues to increase, especially for restaurants and micro small industry. This research was recommend the importance of public policies related to the promotion and socialization of the use of bio-charcoal briquettes as a source of clean energy that is economical and environmentally friendly.  Keywords: bio-charcoal briquettes, renewable energy, SWOT analysis

Are BMP Criteria Really Environmentally Friendly

WRPMD'99 ◽  
1999 ◽  
Author(s):  
Larry A. Roesner ◽  
Robert W. Brashear
Keyword(s):  
Environmentally Friendly
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