The single-effect tubular MVR (Mechanical Vapor Recompression) evaporation system is an evaporator system combining the MVR mechanical vapor compression process with a falling film evaporator. By compressing the secondary steam through mechanical vapor compression, its temperature and pressure are increased, and it is then returned to the heater as a heat source, achieving the recycling of steam and significantly reducing energy consumption. Meanwhile, incorporating the characteristics of the falling film evaporator allows the material to flow in a film-like state on the inner wall of the heating tube, enhancing heat transfer efficiency and increasing evaporation speed.
The feed liquid is introduced at the top of the falling film evaporator and evenly distributed through a liquid distribution device within the evaporator tubes. This process ensures uniform distribution of the feed liquid within the evaporator, laying the foundation for the subsequent evaporation process.
Under the force of gravity, the feed liquid flows downward in a film-like state along the tube wall of the tubular heat exchanger, exchanging heat with the steam in the shell side to undergo evaporation. During this process, the solvent in the feed liquid is evaporated, forming concentrated material and secondary steam.
The concentrated material is discharged through the outlet pump at the bottom of the evaporator, while the secondary steam generated during the evaporation process enters a separator for gas-liquid separation. The separated secondary steam then enters the MVR compressor for secondary heating and pressurization. The heated secondary steam is then redirected back to the shell side of the heat exchanger to continue heating the material, realizing the recycling of thermal energy.
Low Energy Consumption and Operating Costs
Compact Footprint
The overall investment is lower due to fewer utilities and ancillary equipment required.
The system operates smoothly and highly automated.
No Need for Raw Steam
Short Product Residence Time Due to Common Single-Effect Use
The process is straightforward and highly practical, with excellent partial load operating characteristics.
Cost-effective operation, capable of evaporation below 40°C without the need for refrigeration equipment, making it ideal for heat-sensitive materials.
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