Perfected flotation cell for purifying fibrous suspensions

A flotation machine and suspension technology, applied in fiber raw material processing, flotation, fiber raw materials, etc., can solve the problems of pump suction device consumption, high power, complicated maintenance time and other problems, and achieve low implementation cost, overall simplicity, The effect of great flexibility

Inactive Publication Date: 2010-03-24
COMER SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The disadvantage of the described pumping devices connected to the venturi tubes is that the pumping devices consume a lot of power because they have to overcome the flow resistance caused by the venturi tubes, with the result that the flotatio

Method used

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  • Perfected flotation cell for purifying fibrous suspensions
  • Perfected flotation cell for purifying fibrous suspensions
  • Perfected flotation cell for purifying fibrous suspensions

Examples

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Example Embodiment

[0040] figure 1 The flotation machine of the subject of the present invention is illustrated in the figure, wherein the reference numeral 1 indicates the flotation machine as a whole. figure 1 It can be seen that the flotation machine includes a container 2 for the suspension 3 to be purified. The container 2 is preferably but not necessarily cylindrical.

[0041] The suspension 3 is introduced into the container 2 through the supply pipe 4. In different embodiments of the present invention, the number of the supply pipes 4 and the outlet position can be changed according to the flow generated in the container 2.

[0042] For simplicity, figure 1 The figure shows only three supply pipes 4 on the left, however, as image 3 As shown in the plan view, the supply pipe 4 is arranged on the entire periphery of the container 2.

[0043] The flotation machine 1 of the present invention also includes a device 5 for intercepting the purified suspension that flows downward toward the bottom of t...

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Abstract

The invention concerns a flotation cell (1; 30) for purifying fibrous suspensions through the dispersion of air microbubbles (22), comprising: a container (2; 31); feed pipes (4; 34) for conveying thesuspension (3) into the container (2; 31); means (5; 35) for intercepting the purified suspension; means (6) for extracting the purified suspension; means (7) for discharging the foams created by theimpurities contained in the suspension (3); rotary vanes (19; 36) arranged inside the container (2; 31). The cell (1; 30) comprises air dispersers (10; 32; 42) for generating air microbubbles (22) and dispersing them in the suspension (3), in each one of which it is possible to identify one rotor (11; 45) with axial flow associated with driving means (12; 47) and one duct (13; 40; 46) for conveying external air at the level of the rotor (11; 45).

Description

technical field [0001] The invention relates to a flotation machine for cleaning fiber suspensions, especially suitable for use in recycled paper processing. Background technique [0002] As is known, recycled paper is manufactured from an aqueous mixture of fiber suspensions which also contain impurities, mainly inks, which must be removed from the mixture. [0003] Purification of the suspension is carried out according to known techniques in a suitable flotation machine essentially consisting of a vessel in which the fibrous suspension is mixed with a large number of air microbubbles which move spontaneously upwards towards the surface of the suspension, these air microbubbles Bubbles bring impurities to the surface. [0004] Impurities accumulate on the surface of the mixture in the form of foam which can be removed from the vessel while the purified fiber suspension travels towards the bottom of the vessel and is drawn from one or more points to continue the process cy...

Claims

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Application Information

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IPC IPC(8): D21B1/32D21F1/70
CPCD21B1/327B03D1/1412B03D1/24D21F1/70B03D1/1462B03D1/18Y02W30/64
Inventor 佛朗哥·阿韦尔
Owner COMER SPA
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