Mechanical vapor recompression drying system and method

Abstract

The invention discloses a mechanical steam recompression drying system and method. The system comprises a sludge storage tank, a sludge injection pump, a thin-layer evaporation dryer, an extrusion slitting forming machine, a mesh belt dryer, a dry sludge bin, a steam compressor, a cyclone dust collector, a washing dust collector, a condensate water buffer tank and a vacuum pump which is connectedwith the condensate water buffer tank and used for sucking system air to maintain vacuum and discharging non-condensable gas. A large amount of energy consumption and cooling water system consumptioncan be saved. No waste gas is discharged in the process, the system is free of a cooling water system, and water evaporation loss of the cooling tower is reduced.

Description

technical field

[0001] The invention relates to the technical field of sludge drying, in particular to a mechanical vapor recompression drying system and method. Background technique

[0002] Mechanical Vapor Recompression (Mechanical Vapor Recompression) system, referred to as MVR system, is a new type of high-efficiency energy-saving system. MVR evaporation technology has remarkable energy-saving effect. Compared with multi-effect evaporation technology, MVR system fully recovers the latent heat of secondary steam, and its thermal efficiency is generally equivalent to 5-10 effect evaporators.

[0003] In industrial fields such as drying and evaporative concentration, a large amount of water vapor will be generated. Most of the energy carried by water vapor is latent heat, and sensible heat is only a small part. The mechanical vapor recompression system effectively recovers the latent heat of water vapor, thereby achieving the purpose of saving energy and reducing consump...

Images