Axial gas phase dispersion in a molten salt oxidation reactor

2004 ◽  
Vol 21 (6) ◽  
pp. 1250-1255 ◽  
Author(s):  
Yong-Jun Cho ◽  
Hee-Chul Yang ◽  
Hee-Chul Eun ◽  
Jae-Hyung Yoo ◽  
Joon-Hyung Kim
Keyword(s):  
Molten Salt ◽  
Gas Phase ◽  
Phase Dispersion ◽  
Oxidation Reactor

Hydrodynamic and gas phase axial dispersion in an air-molten salt two-phase system (molten salt oxidation reactor)

2005 ◽  
Vol 44 (10) ◽  
pp. 1054-1062 ◽  
Author(s):  
Yong-Jun Cho ◽  
Hee-Chul Yang ◽  
Hee-Chul Eun ◽  
Jae-Hyung Yoo ◽  
Joon-Hyung Kim
Keyword(s):  
Molten Salt ◽  
Gas Phase ◽  
Axial Dispersion ◽  
Phase System ◽  
Two Phase ◽  
Oxidation Reactor

Application of Disk Aerators to Recarbonation of Alkaline Wastewater from Wet Gasification of Carbide

1991 ◽  
Vol 24 (7) ◽  
pp. 277-284 ◽  
Author(s):  
E. Gomólka ◽  
B. Gomólka
Keyword(s):  
Carbon Dioxide ◽  
Liquid Phase ◽  
Gas Phase ◽  
Flue Gas ◽  
Carbonic Acid ◽  
Low Cost ◽  
Flue Gases ◽  
Carbon Dioxide Content ◽  
Patent Claim ◽  
Phase Dispersion

Whenever possible, neutralization of alkaline wastewater should involve low-cost acid. It is conventional to make use of carbonic acid produced via the reaction of carbon dioxide (contained in flue gases) with water according to the following equation: Carbon dioxide content in the flue gas stream varies from 10% to 15%. The flue gas stream may either be passed to the wastewater contained in the recarbonizers, or. enter the scrubbers (which are continually sprayed with wastewater) from the bottom in oountercurrent. The reactors, in which recarbonation occurs, have the ability to expand the contact surface between gaseous and liquid phase. This can be achieved by gas phase dispersion in the liquid phase (bubbling), by liquid phase dispersion in the gas phase (spraying), or by bubbling and spraying, and mixing. These concurrent operations are carried out during motion of the disk aerator (which is a patent claim). The authors describe the functioning of the disk aerator, the composition of the wastewater produced during wet gasification of carbide, the chemistry of recarbonation and decarbonation, and the concept of applying the disk aerator so as to make the wastewater fit for reuse (after suitable neutralization) as feeding water in acetylene generators.

scholarly journals Evaluation of Gas Phase Dispersion in Flotation under Predetermined Hydrodynamic Conditions

2018 ◽  
Vol 35 ◽  
pp. 01011
Author(s):  
Anna Młynarczykowska ◽  
Konrad Oleksik ◽  
Klaudia Tupek-Murowany
Keyword(s):  
Gas Phase ◽  
Gas Bubbles ◽  
Random Variable ◽  
Raw Material ◽  
Particle Collision ◽  
Hydrodynamic Conditions ◽  
Flotation Process ◽  
Phase Dispersion ◽  
Specific Distribution ◽  
Instrumental Methods

Results of various investigations shows the relationship between the flotation parameters and gas distribution in a flotation cell. The size of gas bubbles is a random variable with a specific distribution. The analysis of this distribution is useful to make mathematical description of the flotation process. The flotation process depends on many variable factors. These are mainly occurrences like collision of single particle with gas bubble, adhesion of particle to the surface of bubble and detachment process. These factors are characterized by randomness. Because of that it is only possible to talk about the probability of occurence of one of these events which directly affects the speed of the process, thus a constant speed of flotation process. Probability of the bubble-particle collision in the flotation chamber with mechanical pulp agitation depends on the surface tension of the solution, air consumption, degree of pul aeration, energy dissipation and average feed particle size. Appropriate identification and description of the parameters of the dispersion of gas bubbles helps to complete the analysis of the flotation process in a specific physicochemical conditions and hydrodynamic for any raw material. The article presents the results of measurements and analysis of the gas phase dispersion by the size distribution of air bubbles in a flotation chamber under fixed hydrodynamic conditions. The tests were carried out in the Laboratory of Instrumental Methods in Department of Environmental Engineering and Mineral Processing, Faculty of Mining and Geoengineerin, AGH Univeristy of Science and Technology in Krakow.

Cold-Model Study on Fluidized-Bed Photo-Oxidation Reactor for Shenfu Coal

2011 ◽  
Vol 201-203 ◽  
pp. 2741-2744
Author(s):  
Ya Ting Zhang ◽  
Guang Heng Wang ◽  
Wei Zhao ◽  
An Ning Zhou
Keyword(s):  
Particle Size ◽  
Gas Phase ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Pipe Diameter ◽  
Flow State ◽  
Cold Model ◽  
Photo Oxidation ◽  
Model Study ◽  
Oxidation Reactor

The flow state of both the solid and gas phase in the fluidized-bed photo-oxidation reactor for Shenfu coal was studied by cold-model tests. The results showed that the appropriate pipe diameter, particle size of coal, and the coal addition for the gas-solid fluidized-bed reactor were 22 mm, 60-80 mesh, and 10g, respectively.

Destruction of chlorinated organic solvents in a two-stage molten salt oxidation reactor system

2007 ◽  
Vol 62 (18-20) ◽  
pp. 5137-5143 ◽  
Author(s):  
Hee-Chul Yang ◽  
Yong-June Cho ◽  
Hee-Chul Eun ◽  
Eung-Ho Kim
Keyword(s):  
Molten Salt ◽  
Organic Solvents ◽  
Reactor System ◽  
Two Stage ◽  
Chlorinated Organic ◽  
Oxidation Reactor
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