Multi-effect vacuum forced circulation evaporation device and material concentrating method thereof

Abstract

The invention discloses a multi-effect vacuum forced circulation evaporation device, belonging to the field of evaporation devices. The multi-effect vacuum forced circulation evaporation device comprises at least two forced circulation evaporators, a condensate drain device and a vacuumizing device, wherein the vacuumizing device is communicated with the forced circulation evaporator and the condensate drain device through pipelines; and a feed valve is arranged on a feed pipeline of the forced circulation evaporator of each effect and is used for controlling the feeding of feed liquid. In the invention, the vacuumizing device is used for realizing the vacuum feeding process of the evaporators, and meanwhile, the feed valve and an emptying valve are arranged on each evaporator of one effect; by means of a mode of closing a vacuum pump, opening the feed valves of the double-effect evaporators and simultaneously opening the emptying valve of the evaporator of the secondary effect, materials of the secondary effect can be absorbed into the primary effect and then are continuously heated and evaporated, and the materials are discharged through a forced circulation pump after the material concentration meets requirements after circulation evaporation. The multi-effect vacuum forced circulation evaporation device is suitable for various evaporators and also suitable for concentrating equipment for various organic solvents.

Description

technical field [0001] The invention belongs to the field of evaporators, and in particular relates to a multi-effect evaporation device utilizing vacuum feeding and discharging. Background technique [0002] At present, evaporators are widely used in chemical, pharmaceutical, food and other fields. The multi-effect forced circulation evaporator is operated by connecting several evaporators, and the secondary steam generated during the evaporation in the previous effect evaporator is used as the heating steam for the latter effect evaporator. Due to the repeated use of heat energy for many times, the amount of heat energy consumption is significantly reduced. At the same time, a forced circulation pump is installed between the evaporator and the heater of each effect to increase the flow rate of materials. Therefore, multi-effect evaporation is conducive to mass continuous production. . [0003] Existing multi-effect forced circulation evaporators usually include several e...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the output product consistency of the multi-effect evaporator in the prior art is poor, and at the same time, a feed pump and a discharge pump need to be installed in the process of feeding and discharging, the problem of high equipment cost and complex structure

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