Use scope:
- industrial wastewater treatment (saline wastewater and wastewater containing heavy metals)
- chemical industry (evaporation, crystallization, purification, concentration)
- beverage industry (milk, fruit juice, whey, sugar solution)
- food/additives industry (monosodium glutamate, soy, protein emulsion)
- pharmaceutical (vitamin, etc.)
When the thin secondary steam with the rise of the temperature after the volume compression, so as to realize the low temperature, low
Pressure steam into high temperature and high pressure steam, which can be used as a heat source heating needs to be evaporation concentrate again,
Can achieve the purpose of recycling use of steam. Because the volume is compressed by mechanical compression
Machine implementation, so called MVR. MVR technology was developed in Europe and America market, mature technology with a history of several decades.
MVR technology can condensation will need secondary steam through compression to use again, to replace the fresh steam, not only avoids the use of fresh steam, and thoroughly abandoned the cooling tower, greatly reduces the operating cost, truly the environmental protection and energy saving, water saving, cost saving.
Industrial production in the application of evaporation operation has the following situations:
- condense dilute solution, the concentrated solution to deal with, such as the cooling crystallization)
- concentrated solution of recovered solvents at the same time
- get pure solvents
Evaporation and concentration unit, in general there is no solid precipitation, when and MVR coupling using vertical tubular or horizontal tube falling film evaporator; This is because the heat exchange tube falling film evaporator inside and outside are all in phase change occurs, the heat transfer coefficient is big, can play a better energy saving effect of MVR.
In general, continuous crystallization is carried out under the condition of fully closed, raw materials to join in a row, continuous discharge for pulp, can easily control the temperature, pressure and concentration. Based on parameters such as temperature, pressure, flow and evaporation of accurate control, can accurately control the material liquid saturation, the material is always in a state of the most suitable for crystallization. For evaporation crystallization, boiling liquid surface layer is the trend of supersaturated the strongest areas.
In this area, there are entering instability area and produce a large number of crystal nucleus of danger. Contains a large number of crystal crystal plasma directly sent to the boiling liquid surface, the surface layers of material liquid in at any time there is a lot of crystal, effectively consumption continuously produce degree of supersaturation, only in a relatively low level, avoided in this area due to high supersaturation through a large number of crystal nucleus of danger. Produced by the continuous crystallizer crystal surface finish high, narrow particle size distribution, less amount of mother liquor.
After continuous crystallizer and MVR coupling, the advantages of both got great play: high efficiency, small size, particle size uniform, less operators, supporting utilities less, low energy consumption, and so on, more because of the heat transfer temperature difference is small, in the heat exchange tube structure tend to be very low.
