China MVR Evaporation Plant Suppliers - Energy-Efficient Mechanical Vapor Recompression Factory Solutions
Description
MVR Evaporation plant delivers substantial operational cost savings in areas with an ample supply of low-cost electrical energy.
Once an MVR evaporation plant is running, little or no additional steam is required. In the MVR evaporation plant, a centrifugal fan is used to recompress the vapour to a higher pressure, resulting in a temperature rise. This means that the recompressed vapour can be used as the evaporation plant heating medium, while the condensate is ideal for preheating of the feed product.
For low boiling point increases, a single-stage compressor can be used to fulfill the requirements of the design.
For high boiling point increases, we will provide two designs: multiple-stage compressors, single stage compressors combined with multiple-effect.
⚡ The MVR evaporation plant almost doesn't use steam — electric energy is required as the main energy source.
The power consumption of the main motor of MVR is due to the heat exchange area and the evaporating temperature of the evaporation plant. The Heat exchange area is bigger, and as a result, power consumption is lower, but the investment in equipment is increased.
Evaporating temperature is higher and as a result, power consumption is lower, but fouling in the calandria is therefore increased; Evaporating temperature is lower and as a result, power consumption is higher.
MVR can be powered by an electric motor, the rotary speed of an MVR can be controlled by a frequency converter, and the rotary speed of an MVR may control the evaporation rate and final concentration of the MVR evaporation plant.
Particular Feature
✅ Low specific energy consumption.
✅ Gentle evaporation of the product due to low temperature differences largely increases product quality, decreases fouling.
✅ Short residence times of the product, as a single-effect system is most often used.
✅ Only a small area condenser, requiring little cooling water.
✅ High availability of the plants due to the simplicity of the process.
✅ Excellent partial load behaviour.
✅ Low specific operating costs.
Fields of Application
MVR Evaporation Plant Compared with a Normal Multiple-effect Evaporation Plant
| Type | Multiple-effect evaporation plant / TVR evaporation plant | MVR evaporation plant |
| Energy sources | Steam | Electric power |
| Energy consumption of concentrating water of 1 ton, per hour | 0.16–0.6T | 18–26Kw |
For Example
Evaporation rate: 50T/h
Unit price of steam: 160RMB/T
Unit price of electric power: 0.8RMB/Kw
8000 hours per annum
| Type | 4-effect evaporation plant | MVR evaporation plant |
| Energy consumption | Steam: 11T/h | Electric power: 1000Kw/h |
| Expense of energy consumption, per annum | 14,080,000 RMB | 6,400,000 RMB |
| Economizing expense, per annum | Zero | 7,680,000 RMB |
Legend
1. Evaporator
2. Condenser
3. Plate heat exchanger
4. MVR
5. Condensate Tank
A. Liquor
B. Product
C. Condensate
D. Fresh steam
E. Cooling water
F. Deaeration
Type Selection Criteria for Evaporation Plants
When we design evaporation plants, various requirements must be considered. These determine the type of design, arrangement, the resulting process, the cost of investments, and running expenses.
The most important requirements:
Name of Product
Feeding concentration (dry materials %)
Feeding temperature
Final concentration (dry materials %)
Evaporation rate (T/h)
If crystallization, requirement of crystals
Requirement of controlling, automatization
Product properties
Viscosity and flow properties
Tendency of foaming
Fouling and precipitation
Boiling Point
Steam pressure / temperature
Temperature of Cooling water feeding
Voltage / frequency
Unit price of steam (RMB/T)
Unit price of electric power (RMB/Kw)
Waste vapour rate from dryer
Wet bulb temperature of waste vapour from dryer
Condensate rate from dryer
Condensate temperature from dryer
Liquefaction vapour rate
Liquefaction Vapour temperature
Others
Material of heating pipe
Material of tube plate
Material of contacting with liquor
Material of contacting with secondary steam
Requirement of surface finish
Multiple-effect evaporation plant
TVR evaporation plant
MVR evaporation plant
Waste heat evaporation plant