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What is the role of MVR three effect evaporation?

2020-05-08

MVRthree-effect evaporationThe core component is the steam compressor. The steam compressor is the key equipment for the heat recovery system to increase the steam temperature and pressure of the generated fresh steam through compression. It is the key equipment for generating steam through the steam compressor recovery system and increasing the steam temperature and pressure through compression. It pressurizes and heats the low-pressure (or low-temperature) steam to meet the temperature and pressure requirements required by the process or project.

MVRthree-effect evaporationThe role is to pressurize the clean steam from the reboiler to achieve the pressure requirements of the process. The overall composition of the equipment is more complex, mainly by the compression system, steam cooler and lubrication system of three basic units.

At present, the steam compressors mainly include positive displacement type: Roots compressor, screw compressor; Centrifugal type: multiple tandem centrifugal compressors, multi-stage low-speed centrifugal blowers, single-stage high-speed centrifugal blowers, assembled compressors, etc. In practical applications, mature single-stage high-speed centrifugal steam compressors and Roots-type steam compressors are mostly used.

Centrifugal steam compressor: ordinary centrifugal steam compression fan general compression temperature rise8～10At present, the main application models are basically imported compression fans, which have the advantages of high efficiency and stable performance. Two centrifugal vapor compression fans can be connected in series to obtain a higher compression temperature rise when a higher compression ratio is required, but at the same time, the efficiency of the fan will decrease.

Roots-type steam compressor: Roots compression fan is a volumetric fan. Compared with ordinary centrifugal compression fans, the compression ratio is high, and the temperature rise of single-stage compression can reach25Celsius. For the roots vapor compression blower, it has better stability due to its lower speed. However, the disadvantages of the Roots steam compressor are also obvious, its single-stage volume flow is too small, the efficiency is low, and the maintenance cycle is short.(General2000h/Times)is its birth defect;At the same time, the noise spectrum of Roots blower is wide, and63-8000HZThe low-IF noise is the main component, and the noise in operation is as high100More than decibels, great harm to personnel health.