An Evaporation Concentration System Based on Thermodynamic Compression

Abstract

The invention discloses an evaporation concentration system based on thermodynamic compression. Based on the principle of thermal compression and air humidification and dehumidification, the moisture in the feed liquid is absorbed, and the moisture is condensed and recovered. After the feed liquid is evaporated through multiple cycles, the concentration continues to increase, and the concentrated liquid is crystallized and recovered. The system recovers the heat energy of the circulating moisture-carrying gas through the steam jet pump, and at the same time realizes operations such as heating the material and liquid, recovering waste heat, and condensing condensed water. The system has the advantages of low energy consumption, simple process flow, less moving equipment and high energy utilization rate, and can be widely used in food, pharmaceutical, chemical, metallurgical and other industries.

Description

technical field [0001] The invention belongs to the field of evaporative concentration, in particular to an evaporative concentration system based on thermal compression, which is widely used in petrochemical, food, light industry, pharmaceutical, sewage treatment, biogas slurry concentration, seawater desalination and other industries. Background technique [0002] Fresh water is an important resource for human survival and development. With the development of society and the acceleration of industrial economy, human demand for water resources is increasing. Resources, making full use of water resources and controlling water pollution have become the most urgent problems in today's society. [0003] In the printing and dyeing industry, circuit board industry, electroplating industry, oil refining industry or other organic chemical industries, high-concentration wastewater (or waste liquid) is often produced. The COD concentration of these wastewater is very high, COD≧20000m...

AI Technical Summary

Problems solved by technology

Although multi-stage flash evaporation has many advantages, there are disadvantages such as high operating temperature, low heat transfer efficiency, large energy consumption, and small operating flexibility during operation; the more widely used multi-effect evaporation concentration system can effectively reduce evaporation energy. consumption, but there are also the following disadvantages: if multiple condensers are required for condensation, the equipment investment is large, the condensation efficiency is low, and the operating conditions need to be carried out under negative pressure conditions, so the sealing requirements for operating equipment are higher

The mechanical vapor recompression technology uses the secondary steam evaporated from the boiling waste water in the evaporation chamber to be adiabatically compressed by the compressor, and then reused as a heat source. However, due to the high speed of the steam compressor, the core dynamic equipment, it is easy to cause problems such as corrosion and fatigue. , it is difficult to promote on a large scale

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