Evaporation system and evaporation process capable of online descaling and continuous operation

Abstract

The invention discloses an evaporating system capable of conducting online descaling and working continuously and an evaporating process. The evaporating system comprises n evaporating units, each evaporating unit is composed of an evaporator E and a steam-water separation mechanism S, the n evaporating units are connected in a feed liquor series-connection or parallel-connection evaporation mode to form the complete evaporating system, secondary steam generated by the n evaporating units shares one steam compression machine for pressurization and temperature raising, and a high-temperature steam main pipe is connected out of the steam compression machine and connected to high-temperature steam inlet pipes on the evaporating units in parallel; a liquid inlet pipe of the second-level / set evaporating unit is simultaneously connected with the first-level / set concentrate outlet pipe and a stoste inlet pipe; a concentrate main pipe is arranged, all the evaporating units except the first level / set evaporating unit are connected with the concentrate main pipe, the concentrate main pipe segment between the liquid inlet pipe and the concentrate output pipe of each evaporating unit is provided with a concentrate valve, valves on related inlet pipes and outlet pipes are controlled to isolate the evaporating units to be cleaned, and evaporating work of the system is not affected.

Description

technical field

[0001] The invention relates to an evaporation system and an evaporation process, in particular to an evaporation system and an evaporation process capable of online descaling and continuous work. Background technique

[0002] Evaporation technology has developed rapidly in the production process of food, chemical industry, pharmaceutical and garbage treatment or waste water treatment. There are two kinds of evaporation technologies: multi-effect evaporation with steam as the main heat source and mechanical vapor compression evaporation with electricity as the main source. Since steam mechanical compression evaporation (MVR) uses the secondary steam to be compressed and heated by the compressor to become an evaporation heat source for evaporation, the heat recovery efficiency is very high, and the heat consumption per ton of water produced by evaporation is generally 5% to 10% of that of the three-effect evaporation system. Therefore, the technology of second...

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