MVR evaporator is different from ordinary single effect falling film orMulti effect falling film evaporator， MVR is a monomerevaporatorIt integrates a multi effect falling film evaporator and adopts segmented evaporation according to the required product concentration. That is, when the product cannot reach the required concentration after the first pass through the effect body, it passes through the lower part of the effect body after leaving the effect bodyvacuum pumpDraw the product through the external pipeline of the effector to the upper part of the effector and pass it through the effector again, then repeatedly pass through the effector to achieve the desired concentration.
The interior of the effect body consists of arranged thin tubes, with the product inside and steam outside. During the flow of the product from top to bottom, the increased area inside the tubes causes the product to flow in a film like manner, thereby increasing the heating surface areavacuum pumpCreate negative pressure within the effector, reduce the boiling point of water in the product, thereby achievingconcentrateThe evaporation temperature of the product is around 60 ℃.
The product is produced by heating and evaporating the agentcondensate waterPart of the steam and residual steam after heating the donor pass through togetherseparatorSeparation is carried out, with condensed water flowing out from the lower part of the separator for preheating the product entering the efficiency body, and steam passing through a fansuperchargerPressurization is carried out (the higher the steam pressure, the higher the temperature), and then the pressurized steam is combined through the pipeline to pass through the effect body again.
When the equipment is started, a portion of the steam needs to be preheated. After normal operation, the required steam will be significantly reduced. In the fan boostersecondary steamDuring the pressurization process, the heat energy is converted from electrical energy to steam, resulting in a decrease in the required steam and a significant increase in the required electricity during equipment operation.
The temperature of the product remains around 60 ℃ throughout the entire process of the effect flow, and the temperature difference between the heating steam and the product is also maintained at around 5-8 ℃. The smaller the temperature difference between the product and the heating medium, the more beneficial it is for protectionproduct qualityEffectively prevent pipe sticking.