An electric field enhanced plate type falling film evaporation device and method thereof

Abstract

The invention discloses an electric field enhanced plate type falling film evaporation device and a method. The device mainly comprises a high-voltage power supply, electrode wires, an insulation device, stainless steel plate sheets, insulation sealing gaskets, an insulation support partition and a housing. The adjacent stainless steel plate sheets of the plate type evaporation device are connected with the high-voltage power supply and earthed via the electrode wires respectively, so that a high-voltage electric field is formed; liquid is distributed on an evaporation side through small holes to form falling film flow; steam enters a condensation side of the plate type evaporation device through a plate-to-plate side edge to condense and release latent heat to heat the liquid on the evaporation side; the high-voltage electric field between the stainless steel plate sheets can further strengthen an evaporation process; the evaporated liquid is subjected to steam-liquid separation in a steam-liquid separation space; and the secondary steam and concentrated liquid can be further utilized. According to the device and the method, an evaporation enhancement effect of the high-voltage electric field is utilized, and the high-voltage electric field is formed between the plate sheets of the plate type falling film evaporation device by reasonable arrangement of the electrode wires, so that a heat transfer coefficient can be increased, the heat exchange area is reduced, plates are saved, and energy consumption is reduced.

Description

Technical field [0001] The invention relates to an electric field strengthened plate type falling film evaporation device and a method thereof, and belongs to the technical field of evaporators. Background technique [0002] Evaporation is a unit operation that uses heating to heat a solution containing a non-volatile solute to a boiling state, so that part of the solvent is vaporized and removed, thereby increasing the concentration of the solute in the solvent. There are several occasions for applying evaporation operation in industrial production: 1. Concentrate the dilute solution to directly prepare the product or reprocess the concentrated solution (such as cooling and crystallization) to prepare the solid product, such as the concentration of electrolytic caustic soda, the concentration of aqueous sugar solutions and the concentration of various fruit juices; 2. 2. Concentrate the solution and recover the solvent at the same time, such as the concentrated debenzene of org...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of low heat transfer coefficient and large volume of existing evaporators, apply the phenomenon that the high-voltage electric field can strengthen the evaporation process to traditional plate falling film evaporators, and provide a high heat transfer coefficient and large volume Electric field enhanced plate type falling film evaporation device with small size and low energy consumption and its method

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