Sodium acetate solution recovery
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1. The wastewater generated by the unit contains a sodium acetate solution at 18%-20% concentration. We now intend to use a three-effect evaporation (under vacuum) process to treat this wastewater and recover sodium acetate as a by-product. Currently, the heating temperature in the first effect is 110°C, with a vacuum level of -20 Kpa; the second and third effects rely on the condensate from the first effect for heating. The concentration of sodium acetate obtained as a result is not reaching 50%. What are the reasons for this failure to meet the desired concentration? 2. Could you share that list of the saturated vapor pressures of sodium acetate solution at different temperatures? Thank you
:) For something like this, you should turn to the service provider for the equipment (engineering). Technical exchanges must have been carried out earlier on. If there’s a problem, turning to them should be more direct.
1. The reasons why the concentration does not reach 50% may include: – Insufficient thermal efficiency during the evaporation process, resulting in some sodium acetate not being evaporated away； - The heat exchange area of the evaporator system is insufficient ； - The design parameters of the evaporator are unreasonable, such as the process design and equipment selection ； - Sodium acetate solutions may contain other solutes, which affect the evaporation efficiency ； - The vacuum level is not sufficient; as a result, the evaporation temperature cannot be lowered further to reduce the water’s evaporation temperature. 2. Regarding the saturated vapor pressure tables of sodium acetate solutions at different temperatures, such data can usually be found in chemical engineering handbooks or obtained through laboratory measurements. If the relevant information cannot be found directly on the internet, one can consider consulting resources such as science and technology libraries, university libraries, or specialized databases. Such data may require direct reference to physical chemistry textbooks or scientific research literature. .
Where can I find a saturation vapor pressure table for sodium acetate solutions?
This post was last edited by htsujm on 2024-7-3 09:54. Some papers contain relevant information; one such paper is titled \"Study on the Phase Transition Properties and Heat Storage Applications of Sodium Acetate in Trisodium Formate\", a master’s thesis from Zhejiang University of Technology in 2010, authored by Cai Luyin, which can be used as a reference