How to remove low-boiling-point organic compounds from high-salt wastewater using MVR?

Find a manufacturer specialized in MVR design, production, and commissioning; by following them through the process once, you’ll understand everything.

If the material contains low-boiling organic substances, and it is a simple organic solvent such as ethyl acetate or acetic acid, a flash tank can be added at the early stage of evaporation. If it contains other organic substances that are not easily volatile, a reaction vessel can be used to raise the temperature and remove them, activated carbon can be added for adsorption, and centrifugation can be employed for separation. After evaporation to saturation and crystal precipitation, followed by centrifugal separation, the condensed water resulting from evaporation has low COD and conductivity levels, which can **reduce the processing load on the biological treatment tank and improve its efficiency. The operating cost of MVR is powered by green energy; the electricity consumption per ton of water treated is 50–60 kWh. There are existing successful design examples that have been in use for a year; communication can be enhanced via QQ691951325

The boiling point of ethyl acetate is 77.2°C, while that of acetic acid is 117.9°C. It is recommended to carry out the evaporation process at a temperature of 90–105°C, based on the boiling point of water. Water vapor will contain most of the ethyl acetate and some acetic acid; this vapor will then condense into liquid form. Most of the ethyl acetate will remain as non-condensable gas, while the acetic acid and a small amount of ethyl acetate will be present in the condensed liquid, which can then be subjected to biochemical treatment. The concentrated solution will contain sodium chloride and a small amount of acetic acid. The concentration factor is determined based on the sodium chloride content. Note: The saturated boiling point of an aqueous sodium chloride solution increases.

Look up the boiling points of ethyl acetate and acetic acid, then set the temperature on the evaporator to carry out the evaporation in stages. The evaporated products are disposed of by external parties or treated together with the domestic wastewater from the plant.

This post was last edited by Gorō’s Eight Trigrams Staff on 2015-8-17 at 10:43. By providing the impurity levels in the wastewater and the treatment results, an appropriate MVR solution can be devised

Great! This is the best way to handle it – it protects the compressor as well, and it also makes things easier for the subsequent biochemical treatment of the water!

This post was last edited by zhaolijun on 2015-11-13 at 10:00. Regarding the treatment of this water, it’s necessary to consider the relative amounts of ethyl acetate and acetic acid present in it; in other words, which one is present in larger quantities? Then, the method mentioned on floor 3 can be considered for handling this, which helps to protect the compressor. I personally designed and tested a device of this kind; the organic components are not acetic acid or ethyl acetate, but rather alcohols with low boiling points. There are technical issues to explore regarding evaporation crystallization and preventing clogging.

This post was last edited by zhaolijun on 2015-11-13 at 10:01. Pre-treatment is carried out first to remove low-boiling organic substances and reduce COD, before proceeding to MVR. The wastewater from the rubber additive industry that we deal with is similar to this; feel free to contact me if you have any needs