Mechanical Vapour Re-Compressor System

Recompression of vapours of evaporator to be used again as heating medium with electrical power. This reduces the steam consumption of evaporator drastically and in turn reduces the operating cost of complete setup.

Working Of Mvr :

Mechanical Vapour Compressor is a system in which the Compressor is used to recompress the vapours generated by Evaporator at higher pressure using Electrical power. In MVR these same vapours are used again in evaporator as a heating medium. This eliminates the use of fresh steam.

In MVR technology the operating cost of steam in replaced by power required for compressor. With continuous increasing cost of steam, MVR becomes a CHEAPER option as compared to conventional multiple effect evaporators.

Conventional Evaporation With Tvr :

Advantages Of Mvr Over Tvr :

• Reduction In Steam Consumption Hence Reduction In Operating Cost.
• Reduction In Cooling Water Consumption Hence Reduction In Operating Cost.
• Lower Capacity Steam Boiler Required.
• Lower Capacity Cooling Tower Required.
• Reduction In Space Requirement For Setup.
• Only Single Effect Evaporator Required Instead Of Multiple Effect Evaporator.
• Pay Back Period Of Less Than A Year Of Mvr Over Tvr.

Pay Back Period Calculation Of Mvr Over Tvr :

Utility Consumption
Basis : 2000 Kg/hr Water Evaporation

Assumption

Steam Cost : Rs. 2.5/kg
Power Cost : Rs. 5/kw
Cooling Water Cost : Rs. 1/m3/hr
Operating Hrs : 20 Hrs. /day & 300 Working Days /year

Operating Cost Per Year

Difference in operating cost PER YEAR : Rs. 51,94,000/- 
Difference in capital cost (Additional cost of MVR over TVR): Rs. 40,00,000/-
Pay back period : 10 months.