Energy-saving high-efficiency MVR evaporation and concentration system

Abstract

The invention discloses an energy-saving high-efficiency mechanical vapor recompression (MVR) evaporation and concentration system. Through the system, stable and continuous operation can be realized,and the efficiency of an evaporation process is high. The system comprises a raw material tank, preheating devices, a horizontal tube falling film evaporator, a silk screen defoaming device, a condensate liquid storage tank, a concentrated liquid storage tank, a steam compressor and a vacuum system which are connected through pipelines, valves and related pumps; the bottom of the raw material tank is connected with the inlet of a feeding pump, and is connected with the inlet of the horizontal tube falling film evaporator through the multi-stage preheating devices; the silk screen defoaming device is arranged at the top of the horizontal tube falling film evaporator; the bottom of the horizontal tube falling film evaporator is connected with the concentrated liquid storage tank; the tube pass of the horizontal tube falling film evaporator is connected with the condensate liquid storage tank; steam condensate water is connected with the preheating devices through the condensate liquid storage tank; the vacuum system comprises a water-ring vacuum pump, a vacuum condenser, a vacuum condensation liquid storage tank and a circulating water tank; and the discharge of pressure and non-condensable gas in the tube pass of the horizontal tube falling film evaporator is completed through feedback regulation of a pressure transmitter and a control valve.

Description

technical field [0001] The invention relates to an evaporation system, in particular to an energy-saving and high-efficiency MVR evaporation and concentration system. Background technique [0002] With the rapid development of industry, our country is now facing a huge energy crisis, which has become the main obstacle restricting the development of some enterprises. At the same time, people's weak awareness of environmental protection and the extensive development model for many years are also facing serious threats to the environment. Therefore, the country vigorously advocates energy conservation and emission reduction, vigorously promotes the development of energy-saving and environmental protection industries, and regards energy conservation and environmental protection as China's One of the basic national policies. [0003] Evaporation is a basic operation unit in the chemical process, which requires a large amount of fresh steam as a heating source, and at the same ti...

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Problems solved by technology

In addition, as the place where the evaporator generates secondary steam, its heat transfer coefficient also seriously affects the level of evaporation efficiency and equipment investment.

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