Relationship between reduced area of the evaporator heating chamber and production volume
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 at 23:54. Our factory’s evaporation production process involves a three-effect, four-unit, two-stage setup. The concentrated-phase evaporator was replaced due to corrosion and leakage in its heating chamber, as it is used for producing 45% caustic soda; the new heating chamber has an area that is 10 square meters smaller than the original one. As a result, the production volume has decreased during actual operation. We are currently unsure about the relationship between the reduced area and the drop in production volume, as well as the calculation method for this. Please help us out. Thank you! ! ! # ， ， &
It can generally be estimated based on the evaporation rate per unit area. I haven’t calculated it specifically either.
It is essentially a heat balance calculation: 1. Measure the temperature difference between the inlet and outlet of the liquid in the heating chamber, and calculate the heat transfer coefficient of that chamber. List the equation relating the heat transfer area to the temperature of the liquid at the outlet of the heating chamber. 2. Measure the gas phase pressure in the effluent separation chamber, and determine the temperature corresponding to saturated water vapor at that gas phase pressure ； The temperature of the liquid at the outlet of the heating chamber is measured; the heat released when the liquid cools down to the temperature corresponding to saturated water vapor is the enthalpy of phase change of water, and from this, the amount of water that can evaporate can be calculated. List the relationship between the liquid outlet temperature from the heating chamber and the amount of evaporation. 3. With these two equations, it is possible to determine the relationship between the heat transfer area and the amount of evaporation
For example, if the area of the heating chamber was originally 240 square meters and it is reduced by 10 square meters, what changes will occur in the production intensity? Please provide specific theoretical support. Thank you so much! ! ! (We use a three-effect, four-body, two-stage evaporation process)