Horizontal blade-wheel reactor

There are mass transfer tasks in the G/L systems, which require special reactor designs. Such tasks include absorption processes, in which strongly diluted gases necessarily participate and the liquid phase consists of liquids which are inmiscible or contain an readily precipitating solid. Examples are oxidation reactions with an ozone-air (3 vol.-% O3) or an ozone-oxygen mixture (6 vol.-% O3), flue gas scrubbing of 6-8 vol.-% CO2 with waste caustic soda, whereupon sodium carbonate is formed and upon exceeding its solubUity precipitates out, etc. 

Common to these devices is the intensification of the surface gas-liquid contacting. They will be delt with individually below. 

The paddle-wheel reactor [622] consists of a horizontal cylinder, in which just above the bottom a paddle-wheel with 2 paddles is fitted extending over the length of the tank, see Fig. 4.40. In investigations on a laboratory apparatus of this type (D = 0.3 m L/D = 5 D/d = 2 h/D = 0.1 z = 6) both the angle of 

This yielded the following expressions for the efficiency of the apparatus  

Horizontal cylinder with 4-turbine stirrers on the horizontal shaft, see Fig. 4.41. Measurements [147] in four geometrically similar devices (D = 0.16 to 0.50 m) with L/D = 2-6 and z = 1 to 6 turbine stirrers on the shaft were carried out under chemisorption conditions (material systems NH3/H2SO4 and H2S/ NaOH), whereby the reaction gases were strongly diluted with air. Thus here 

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