Air-flotation swirling flow contactor and air-flotation swirling flow system

A contactor and flow system technology, applied in chemical instruments and methods, flotation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems affecting process flow, low efficiency, pollution, etc., and achieve large treatment flow , increase the processing capacity, and improve the separation effect

Active Publication Date: 2018-04-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From this process, it can be found that in the traditional air flotation separation technology, it mainly relies on the diffusion motion of the bubble itself to collide with the suspended matter, which is inefficient.
[0004] In industrial applications, in order to improve the contact effect between suspended solids and air bubbles, flocculants are generally used to form suspended solids into flocs. One is to combine suspended solids with each other to increase the floating speed. It has a wide distribution and has a stronger ability to trap air bubbles, but the use of flocculants is equivalent to adding new impurities to the sewage, which may cause new pollution or affect the subsequent process, so there are also disadvantages

Method used

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  • Air-flotation swirling flow contactor and air-flotation swirling flow system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Refer to attached figure 1 : Air flotation cyclone contactor, including a conical cylinder 1, the side wall of the conical cylinder 1 is connected with a tangentially arranged liquid inlet pipe 5, the top of the conical cylinder 1 is provided with an exhaust port 2, and the bottom is provided with a liquid outlet pipe 6. The outer end of the liquid inlet pipe 5 is provided with two branch pipes.

[0026] The conical cylinder 1 has a narrow top and a wide bottom, and the liquid inlet pipe 5 is arranged on one side of the lower part of the conical cylinder 1 . The top of the cone 1 is provided with an exhaust cavity, and the top of the exhaust cavity is connected to the exhaust port 2 . The liquid outlet pipe 6 is arranged concentrically with the conical cylinder 1, the top of the liquid outlet pipe 6 extends into the inside of the conical cylinder 1, and the top of the liquid outlet pipe 6 is arranged on the top of the conical cylinder 1, and the top of the liquid outle...

Embodiment 2

[0034] The liquid outlet pipe 6 is concentrically arranged with the conical cylinder 1 , the upper part of the liquid outlet pipe 6 extends into the inside of the conical cylinder 1 , and the top of the liquid outlet pipe 6 is arranged at the bottom of the conical cylinder 1 . The top of the liquid outlet pipe 6 is set at the lower part of the conical cylinder 1. Compared with the top of the liquid outlet pipe 6, which is set at the upper part of the conical cylinder 1, it can have a longer residence time and avoid bubble-suspension polymerization. The material moves to the outer wall of the liquid outlet pipe 6 under the action of centrifugal force, but cannot leave the inner cavity of the cyclone contactor. Other settings and working principles are the same as in Embodiment 1.

Embodiment 3

[0036] The liquid inlet pipe 5 is arranged on one side of the middle part of the tapered cylinder 1 . The liquid inlet pipe 5 is set on one side of the middle of the conical cylinder 1, so that the liquid flows from top to bottom. This way can increase the residence time of the bubbles in the contactor and increase the concentration of the bubbles in the contactor. Other settings and working principles are the same as in Embodiment 1.

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Abstract

An air-flotation swirling flow contactor and an air-flotation swirling flow system belong to the technical field of air floatation separation. The contactor is characterized by comprising a conical barrel (1), and the side wall of the conical barrel (1) is connected to a tangentially-arranged liquid inlet pipe (5); the top of the conical barrel (1) is provided with an air outlet (2), and the bottom is provided with a liquid outlet pipe (6); and the outer end part of the liquid inlet pipe (5) is provided with two branch pipes. According to the technical scheme, a swirling flow way is used to mix gas-dissolved water and sewage together, the mixed liquid makes low-intensity swirling motion in the contactor, and collision between bubbles and suspended particles is caused because of the movement of the suspended particles and the bubbles and change of a streamline, so that the inertial collision and the centrifugal sedimentation collision of the bubbles and suspended matters are effectivelyenhanced, the contacting effect of the bubbles and the suspended matters is promoted, the separation effect of air floatation is improved, and the handling capacity is substantially improved.

Description

technical field [0001] An air flotation cyclone contactor and an air flotation cyclone system belong to the technical field of air flotation separation. Background technique [0002] At present, air flotation is still a widely used technology in sewage treatment. The principle of air flotation is to form a large number of dispersed micro-bubbles in the sewage, so that the micro-bubbles collide with the suspended matter in the sewage and attach to the suspended matter to form a polymer. The apparent density of the polymer is lower than that of water, so the polymer can float to the water surface and thus Separated from the water, so that the sewage can be purified. Since the apparent density of the polymer formed by air bubbles and suspended matter is also smaller than that of suspended matter, air flotation can increase the floating speed of suspended matter whose density is lower than that of water. [0003] The collision speed of bubbles and suspended solids directly aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/24C02F1/38C02F9/02C02F1/52
CPCC02F1/24C02F1/38C02F1/52C02F9/00
Inventor 孙治谦周衍涛刘伯川王振波李强朱丽云
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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