MVR continuous evaporation system

Abstract

The invention discloses an MVR continuous evaporation system. The system can be applied to the requirements on different evaporation pressures, and automatic control of continuous and stable feeding and continuous discharging can be realized. The system disclosed by the invention comprises a raw material balance tank, a main body evaporator, a gas-liquid separator, a condensate storage tank, a steam compressor, a vacuum system and at least three heat exchange devices which are connected by virtue of pipelines, control valves and related pumps, wherein the bottom of the raw material balance tank is connected with the inlet of a feeding pump and is connected with an interval inlet of the top end of the main body evaporator by virtue of a heat exchange device; multiple evaporation intervals are contained in the main body evaporator; a gas-liquid collection cavity is formed in the bottom end of the main body evaporator and is connected with the next evaporation interval by virtue of a booster pump; the concentrated solution in the final evaporation interval is used for preheating the raw materials by virtue of the heat exchange devices; the shell pass of the main body evaporator is connected with the condensate storage tank; and steam condensate is connected with the heat exchange devices by virtue of the condensate storage tank, and the raw materials can be preheated.

Description

technical field [0001] The present invention relates to an evaporation system, more specifically to an MVR continuous evaporation system. Background technique [0002] Evaporation and concentration is an important operation unit in the industrial production process, especially in the fields of fermentation, wastewater treatment, chemical industry, seawater desalination and papermaking. The main heat source used in the traditional evaporation process is steam, and the evaporation equipment is a multi-effect evaporation system composed of falling film evaporators. Although the multi-effect evaporation system can use secondary steam for many times and reuse heat energy, it still needs to consume a lot of steam, and as the number of effects increases, the utilization rate of steam latent heat will decrease, and the volume will be relatively large. [0003] MVR is the English abbreviation of mechanical vapor recompression technology, and its full English name is Mechanical Vapor...

AI Technical Summary

Problems solved by technology

The main heat source used in the traditional evaporation process is steam, and the evaporation equipment is a multi-effect evaporation system composed of falling film evaporators. Although the multi-effect evaporation system can use secondary steam for many times and reuse heat energy, it still needs to consume a lot of steam, and as the number of effects increases, the utilization rate of steam latent heat will decrease, and the volume will be relatively large

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