Low-temperature negative-pressure drying system for heat-sensitive materials

Abstract

The invention discloses a low-temperature negative-pressure drying system for heat-sensitive materials. The system comprises a pretreated material collection tank, a to-be-treated material preheatingtank, a low-temperature negative-pressure drying unit, a steam compression system, a concentrated material treatment system, a heat exchange steam treatment system and a steam scrubber tower system, wherein the pretreated material collecting tank is communicated with a to-be-treated material preheating tank, and the to-be-treated material preheating tank is connected with a feeding hole of the low-temperature negative-pressure drying unit through a conveying pipeline and a conveying pump; the steam compression system is connected with a compressed steam inlet of the low-temperature negative-pressure drying unit; the concentrated material treatment system is connected with a concentrated material outlet of the low-temperature negative-pressure drying unit; wherein the concentrated materialtreatment system is connected with a to-be-treated material preheating pool through a waste heat gas conveying pipeline and a waste heat gas conveying fan, the heat exchange steam treatment system isconnected with a heat exchange steam outlet of the low-temperature negative-pressure drying unit, and the steam scrubber tower system is connected with the low-temperature negative-pressure drying unit and the steam compression system. The system has the advantages of low heat energy consumption, low operation cost and no pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of concentration, evaporation and drying of heat-sensitive materials, in particular to a low-temperature negative-pressure drying system for heat-sensitive materials. Background technique [0002] At present, the heat-sensitive materials involved in the existing dairy, food, pharmaceutical, chemical and other industries exceed a certain temperature, and the materials are prone to discoloration, melting, sublimation and other quality degradation phenomena. A type of drying device commonly used now is mainly through separate boiling, spraying, freezing, infrared, microwave and other operations, or the use of thermal energy or other methods in industrial production to remove the moisture in wet materials to obtain dry materials. , and then allow the material to be used better or to meet the needs of further processing. However, the existing material evaporation and drying device always needs to supply a large ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and provide a low-temperature negative pressure drying system for heat-sensitive materials, which effectively solves the heat energy consumption of the material concentration, drying and evaporation devices in the existing dairy, food, pharmaceutical, chemical and other production lines Large, high operating costs, polluting the environment, and large temperature differences affect product quality

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