In the control of acid rain, power plant sulfur emissions can be controlled by s
ID: 490392 • Letter: I
Question
In the control of acid rain, power plant sulfur emissions can be controlled by scrubbing and spraying the flue gases with a lime slurry, Ca(OH)_2. The calcium reacts with the sulfur dioxide to form calcium sulfate, CaSO_4, a white powder suspended in water. The volume of this slurry is quite large, so it has to be thickened. Suppose the power plant Produces 27 metric tons of CaSO_4 per day, and that this is suspended in 108 metric tons of water. The intention is to thicken this to a solid concentration of 40% solids, What is the solids concentration of the CaSO_4 slurry when it is produced in the scrubber? How much water (tons/day) will be produced as effluent in the thickening operation? Acid rain problems can also be reduced by reducing the amount of electricity produced and used. What responsibility do individuals have, if any, not to waste electricity? Argue both sides in a half-page paper.Explanation / Answer
CaSO4 is produced =27 tons water =108 tons when it is produced in the slurry its concentration =100* 27/(27+108)= 20%
it is thickended to 40%. Hence 27 = P*0.4, P is thickened product, P= 27/0.4= 67.5 tons
water in the thickned product = 67.5-27= 40.5 Tons
water in the effluent = 108-40.5= 67.5 tons
Individucals will have to believe that sustainablem development is possible by what is saved to-day. For example, switch off the fans when no body is there in the room.
Design energy efficient burners.
Use of alternative energy sources whereever possible for example solar inverters.
Use of hydrogen as fuel. This is supposed to be clean fuel.
Use of methane fueled engines.