Calculation of steam consumption and condensate consumption for vacuum distillation
Thread Content
Distillation is carried out using low-pressure steam (0.3 MP at 130 degrees Celsius) in a 5-cubic-meter jacketed reactor (d=1750), under reduced pressure of (-0.075 MP); the consumption of steam and circulating cooling water per hour for 3 cubic meters of trimethylbenzene is as follows.
It says there are too few parameters! ! At 120 degrees, with a density of triphenylmethane of 780 kg/m3, an evaporation rate of 3 m3/h, and cooling water at 32 degrees, the data are as follows: 1) 0.3 MPaG and 450 kg/h are required ； 2) Cooling water outlet temperature: 37 degrees, flow rate: 40 m3/h; 3) Water ring pump, 1.45 kW.
The heat exchange area of the stainless steel heat exchanger is 20 square meters. For ordinary circulating water, (taking a heat transfer area of around 9 m2 into account), the tank is cylindrical. Could you provide me with the calculation process?
Calculated manually. The 20-square-meter condenser seems a bit small! Around 25~30 square meters is a safe range.
Calculation of heat exchangers: whether for gases or liquids, make full use of Q=UA(LMTD)=MCp(T2-T1)