Roots steam compressor used in MVR evaporation system
Roots steam compressor is mainly composed of master-slave rotor set, shell, mechanical seal, bearing, synchronous gear and coupling. It is suitable for purification of organic working medium, desalination of seawater, steam compression and transportation, concentration and crystallization in chemical industry, pharmaceutical industry, metallurgy industry and food industry, and treatment of industrial waste liquid. It is the main body of secondary steam recompression in MVR system.
MVR evaporator components:
The liquid material inside the evaporator heated by steam for evaporation. Choose different type evaporator according to different liquid material features.
use to separate vapor and liquid, according to different liquid features choose different type separator(crystallizer), such as normal separator, gravity separator, special design separator (crystallizer ).
Use to keep the whole system vacuum degree, pump some air, fixed gas, liquid entrainment of gas from the evaporator, so as to obtain the whole system stable evaporation process.
Use to transfer liquid and concentrated liquid. According to different liquid features choose different pumps, such as centrifugal pump, displacement pump,screw pump.
Use to compress secondary vapor to supply heating source, improve secondary vapor enthalpy. According to different flow and compression ratio choose different compressor, in the case of pressure rise increase, multistage compressor can be used in series.
MVR Evaporation system control center, by regular motor speed, control valve,flow meter, temperature and pressure, to realize automatic evaporation, cleaning, stop operations and so on. Automatic alarm, automatic protection system is not damaged, keep dynamic balance.
Different liquid after period of evaporator, there maybe scaling phenomenon, general speaking, 99% of the scale can be removed by adding chemical solvent, and can use CIP clean in situ or disassemble to clean.
Scope of application:
Mechanical vapor compression(MVR) evaporator, suitable for milk, glucose, organic acid, VC, xylose, pharmaceutical, chemical and biological engineering, environmental engineering, waste recycling, paper making, salt industry for low temperature concentration.
Best possible energy efficiency
Compared to multiple-effect evaporators, MVR evaporators consume considerably less energy.
Low vapor velocities inside the evaporator, low shear rates, and the free flow falling film construction are advantages of the design in minimizing foam creation. This is especially important in MVR evaporators, not only to maximize the production of clean condensate, but also for protection of the compressor or fan.
Uniform liquor distribution of the liquor over the lamellas, and the continuous redistribution of the liquor created by the dimpled shape of the lamella surface, ensure a completely wetted heating surface and eliminate local scaling or over-concentration of liquor. The lamella heating surface ensures that water-soluble scaling can be washed away by a simple dilution wash, eliminating the need for time-consuming and costly outages for cleaning.
Highly efficient condensate segregation in the evaporator ducts and lamellas, plus the integrated stripping of foul condensate fractions, produce clean and re-usable water.
|Name||Pillow plate series||Shell and tube heat exchanger||Detachable plate heat exchanger||Spiral plate heat exchanger|
|Operating temperature range||<800℃||<800℃||<170℃||<350℃|
|Maximum pressure||<60 bar||<200 bar||<32 bar||<25 bar|
|Heat transfer coefficient to water[W/m2·℃]||3500||2700||5600||2000|
|Application of air and water heat exchange||fit||fit||not fit||Partial fit|
|Immersion in tank or water||fit||Partial fit||not fit||not fit|
|Welding of tank and reactor||Applicable||not applicable||not applicable||not applicable|
|Install into the existing reactor and other equipment||Flexible application||Partial applicable||not applicable||not applicable|
|All welded construction||Applicable||Applicable||not applicable||not applicable|
|Heavily contaminated liquids and other applications||Applicable||Applicable||Partial Applicable||Applicable|
|Weight per unit area||low||high||low||high|
|Falling film, condenser and evaporator||fit||fit||Partial fit||Partial fit|