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An absorption tower containing wooden grids is to be used for absorbing SO, in a sodium sulfite solution. A mixture of air and SO, will enter the tower at a rate of 70,000 ft3/min, temperature of 250°F, and pressure of 1.1 atm. The concentration of SO2, in the entering gas is specified, and a given fraction of the entering SO, must be removed in the absorption tower. The molecular weight of the entering gas mixture may be assumed to be 29.1. Under the specified design conditions, the number of transfer units necessary varies with the superficial gas velocity as follows:
where Gs is the entering gas velocity as lb/(h)(ft2) based on the cross-sectional area of the empty tower. The height of a transfer unit is constant at 15 ft. The cost for the installed tower is $1 per cubic foot of inside volume, and annual tied charges amount to 20 percent of the initial cost. Variable operating charges for the absorbent, blower power, and pumping power are represented by the following equation:
The unit is to operate 8000 h/year. Determine the height and diameter of the absorption tower at conditions of minimum annual cost.
In the batch preparation of an aqueous solution, the water is first heated to 80 °C in a jacketed, agitated vessel; 1000 Imp. gal. (4545 kg) is heated from 15 °C.
The formation of ice during colder weather helps temper the seasonal transition to winter. This is mainly because
Determine the drying time for the constant rate period in hours - The drying time for the falling rate period in hours.
Give the relation for strain energy in a rubber as a function of the extension ratios, and from this develop equations developing the extension ratio and the engineering stress for uni-axial extention
Implications of the future of fabrication for international trade, transportation, and logistics
At steady state with a feed concentration of 4 gmol/lit., and mean residence time of 65 sec in the second reactor, the concentration of feed to second from the first is found to be 2 gmol/lit., while that of the stream leaving the second is 1 gmol..
Hardness is 160 ppm and flow rate is 40 m3/hr ,I want to know the amount resin quantity required. Please give me a solution with details.
The reflux ratio is set at 4.0:1. Calculate the kg mol/h distillate D and bottoms W and their compositions. Also, calculate the number of theoretical plates required.
Assist with the setting of design variables necessary for sizing equipment
Calculating the Maximum Volume of Fermentor that can be used without Additional Cooling, The heat generated by fermentor is 60 kcal/hr L. The cooling capacity of jacket is 10,000 kcal/hr m^2. For a cylindrical fermentor with H/D of 3, the jacket a..
Calculate the equilibrium conversion, then redo parts (a) through (c) to achieve a concentration that is 90% of the calculated equilibrium conversion.
Coal gasification is carried out at 850 °C and 40 atmospheres pressure, by reaction of coal with steam and oxygen. The empirical formula of the coal is roughly CH0.8S0.013. What materials of construction would you recommend for:
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