Positive air admission type flotation deinking tank for lab

Abstract

The invention discloses an active charging floating selection void groove used in lab, wherein, the slurry opening of groove is arranged at the bottom of groove (1); the outlet box (10) is arranged under the groove (1); the slurry opening (9) is communicated with the outlet box (10); the outlet box (10) is connected with the slurry pump (5); the bottom of groove (1) is mounted a porous aerated device (8); the top of groove (1) is arranged with a foam scraper support (14) and a foam scraper (7) which can rotate horizontally; the upper part of groove is arranged with an ink outlet (4). The invention has controllable gas input and the ratio between the slurry and gas, with adjustable mixed degree between slurry and gas, while the slurry can be circulated, to realize continuous void. The invention has simple structure and operation, to be used in lab to optimize the floating selection void technique and compare the property of void agent, or the like.

Description

technical field [0001] The invention relates to a flotation cell, more specifically, to a flotation deinking cell which is inflated by active air intake and is suitable for laboratory research. Background technique [0002] There are two main types of flotation equipment in waste paper deinking treatment: one is mechanical stirring flotation machine; the other is passive suction flotation machine. The former such as the OK flotation cell that sucks in air through the rotation of the rotor and mixes the slurry and gas, and the latter such as the Ecocell flotation cell that uses the Venturi principle to suck air and mix the slurry and gas. Due to the mechanical rotation of the rotor, it is difficult to accurately control the range of dispersed bubbles and the mixing degree of slurry gas, and the deinking effect is not ideal. Therefore, mechanical stirring type flotation equipment has been rarely used in production in recent years. Some process conditions such as stirring spee...

AI Technical Summary

Problems solved by technology

The cross-section of the tank body of the flotation device is elliptical, and the injector and the ink overflow tank are respectively arranged close to the two ends of the long axis of the ellipse. Since the slurry gas is fully mixed in the injector, the flotation effect is relatively ideal. The range of increased speed is between 7-11% ISO, and there are no rotating parts inside the tank body, which is convenient for maintenance and repair, so it is used by many paper mills. However, due to the use of Venturi principle for suction, the process parameters are difficult to control, and the required The pulp flow rate is too high, so it is rarely used as a laboratory flotation deinking model

[0003] In addition, there is another kind of flotation equipment, that is, the flotation column, which uses the active air intake method with controllable air intake to achieve flotation deinking treatment. Due to the excessive length-to-diameter ratio structure and limited Production capacity, the development of flotation columns has been slow, and there are not many applications in current production practice

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