Kettle type crystallization equipment and application thereof in production of potassium permanganate

Abstract

The invention discloses kettle-type crystallization equipment and application thereof in production of potassium permanganate, belonging to the technical field of chemical engineering. The kettle-typecrystallization equipment comprises a kettle body, wherein a cooling water circulating device is arranged on the kettle body, a rotating shaft and a driving device for driving the rotating shaft to rotate are arranged on the kettle body, stirring blades are arranged on the rotating shaft, scraping devices are arranged on the stirring blades, each scraping device comprises a movable plate, the movable plates are movably connected with the stirring blades, a scraping plate is arranged on each movable plate, and the scraping plates can abut against the inner wall of the kettle body. According tothe kettle type crystallization equipment disclosed by the invention, the scraping plates are arranged on the stirring blades, so while stirring is conducted, crystals crystallized on the inner wallof the kettle body are scraped off; and thus, a solution can be uniformly crystallized, and influence on crystallization efficiency due to the influence of the crystals on a wall part on a cooling rate can be effectively avoided.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a kettle-type crystallization equipment and its application in the production of potassium permanganate. Background technique [0002] Potassium permanganate is electrolyzed to produce potassium permanganate, and the potassium permanganate crystal discharged from the cell is still the primary product, which is too alkaline and has a small amount of mechanical impurities. After one or more times of dissolution, heating, clarification, and separation of impurities, the clarified liquid is recrystallized to obtain high-purity potassium permanganate. This process is now commonly used by various manufacturers for basin crystallization. [0003] Basin-type crystallization refers to discharging high-temperature clarified liquid into the crystallization basin, which is a rectangular or round open flat-bottomed static container. Because the clarified liquid is in a saturated or supersa...

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Problems solved by technology

[0006] The crystallization basin is a flat-bottomed container, and the mixed material cannot be discharged through the potential difference or power. After the mother liquor is drained through the bottom valve, the solid material can only be transferred manually.

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