High-concentration waste liquid evaporator

Abstract

The invention relates to a high-concentration waste liquid evaporator which comprises a tank body, wherein a stirring shaft with stirring blades is arranged in the tank body, and a liquid level detection device is mounted in the tank body; the stirring shaft is driven by a stirring motor at the top of the tank body; the liquid level detection device comprises a floating ball tube, a floating ball,a ruler tube and a magnetic induction ruler; the floating ball tube is inserted into the tank body; the floating ball floats in the floating ball tube; the ruler tube is mounted at the top of the floating ball tube and arranged outside the tank body; the magnetic induction ruler is mounted on the outer side of the ruler tube; a magnet capable of moving up and down is arranged in the ruler tube; the magnet is connected with the floating ball through a connecting rod; a plurality of groups of stirring blades are arranged up and down at intervals; the stirring blades and the stirring shaft are axially arranged in a sliding manner. With the adoption of a magnetic turning plate type liquid level detection device, the defects that a U-shaped liquid level meter cannot be detected due to crystallization and the traditional ultrasonic liquid level meter is inaccurate in detection due to agitation of inner liquid can be overcome; with the adoption of the upper and lower floating stirring blades, the stirring resistance can be timely reduced, and the stirring effect is improved.

Description

technical field [0001] The invention relates to an evaporator, in particular to a high-concentration waste liquid evaporator. Background technique [0002] Evaporators are widely used in chemical industry, food industry. In the pharmaceutical and other industrial fields, it is mainly used to concentrate dilute solutions to directly produce products or to process concentrated solutions into solid products; to concentrate solutions and recover solvents; to obtain pure solvents, etc. [0003] At present, when the evaporator is used for high-salinity waste liquid, the liquid evaporates completely, and the remaining salt concentrate is discharged. After the discharge, the temperature drops to room temperature and the salt precipitates out. [0004] The application number is 2012203081685, and the name is a patent for a high-efficiency enamel evaporator. In the disclosed technical solution, since the evaporator is an enamel reaction equipment, it is airtight and opaque, and the l...

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Problems solved by technology

[0004] The application number is 2012203081685, and the name is a patent for a high-efficiency enamel evaporator. In the disclosed technical solution, since the evaporator is an enamel reaction equipment, it is airtight and opaque, and the liquid level cannot be displayed; for the convenience of displaying the liquid level, a U-shaped tube is conventionally used , but because the concentrated salt liquid is easy to crystallize and block in the U-shaped tube, the liquid level display is inaccurate; and, because the internal paddle keeps stirring and the page is unstable and fluctuates greatly, it is impossible to use a conventional ultrasonic liquid level gauge Accurate measurement

[0005] In the existing evaporator, the stirring blade has a fixed structure. During the evaporation process, due to the existence of crystals, the stirring resistance of the lower layer is greater than that of the upper layer. The stirring resistance of the fixed stirring blade cannot be adjusted in real time, resulting in poor stirring effect; Moreover, due to the lack of a crystal salinity detection structure, the evaporation time can only be judged based on experience, resulting in excessive evaporation or multiple evaporations, and low efficiency

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