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Micron bubble-generating device and special cyclone thereof

A technology of micro-bubbles and cyclones, which is applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of difficult processing, high material strength requirements, easy clogging of micropores, etc., to avoid Large energy loss, low equipment cost and energy consumption, and the effect of improving activity

Inactive Publication Date: 2009-10-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the existing micro-bubble generating devices are microporous aeration devices, which are divided into plate type, disc type and tube type. In the application, there are mainly shortcomings such as high requirements on material strength, difficult processing, and easy blockage of micropores (Wu Min, Yao Nianmin , Discussion on the comparison and selection of microporous aerators, Engineering and Technology, 2002, 5: 16-18)

Method used

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  • Micron bubble-generating device and special cyclone thereof
  • Micron bubble-generating device and special cyclone thereof
  • Micron bubble-generating device and special cyclone thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, utilize the particle diameter of the microbubble that described device produces

[0041] 1. Micro bubble generating device

[0042] 1. Cyclone

[0043] The structure of the cyclone is as figure 1 shown.

[0044] The above-mentioned cyclone is made of plastic.

[0045] In the cyclone, the height of the frustum-shaped cavity is 75mm, the diameter of the upper bottom is 16mm, the diameter of the lower bottom is 60mm, and the height of the cylindrical cavity is 25mm; the volume of the inner cavity of the cyclone is about 170mL; the through hole The inner diameter of 21 and 22 is 10 mm; the inner diameter of through hole 23 is 6 mm; the inner diameter of through hole 24 is 16 mm.

[0046] Pipes are connected to the through holes 21 and 22, and the inner diameter of the pipes is 10 mm. A pipe is connected to the through hole 23, and the inner diameter of the pipe is 6mm.

[0047] 2. Micro bubble generating device

[0048] The structure of the micro-bubble...

Embodiment 2

[0069] Embodiment 2, the mensuration of the oxygen mass transfer performance of micro-bubble generating device

[0070] The device of the present invention is tested by using a general test method for oxygen mass transfer performance in the field of water treatment. The indicators of oxygen mass transfer performance include overall mass transfer coefficient, oxygen charging capacity and oxygen transfer efficiency.

[0071] Overall mass transfer coefficient K L a is calculated according to the following formula:

[0072] dC dt = K L a ( C * - C )

[0073] In the formula, C is the measured dissolved oxygen concentration, C* is the saturated dissolved oxygen concentration, and t is the reaction time.

[0074] Oxygenation capacity R=K L a×C *

[0075] Oxygen transfer efficien...

Embodiment 3

[0099] Embodiment 3, the influence of temperature on the mass transfer performance of device

[0100] 1. Micro bubble generating device

[0101] Same as Step 1 of Example 1.

[0102] Insert a thermometer in the reactor.

[0103] 2. Micro bubbles are generated under different temperature conditions

[0104] Reactor 1 was filled with water to 15L, and 70mg CoCl was weighed 2 and 0.9g Na 2 SO 3 Add water to remove dissolved oxygen; turn on the water pump after the reading of the dissolved oxygen meter is zero, and adjust the temperature, liquid flow and gas flow of the water in the reactor, as follows:

[0105] Test One: Q L =65,Q g =26,T 0 = 22.5°C;

[0106] Test Two: Q L =65,Q g =26,T 0 = 30.1°C;

[0107] Trial Three: Q L = 45, Q g =20,T 0 = 22.5°C;

[0108] Test Four: Q L = 45, Q g =20,T 0 = 30.8°C;

[0109] Test Five: Q L =30,Q g =9,T 0 = 22.5°C;

[0110] Test Six: Q L =30,Q g =9,T 0 = 30.8°C;

[0111] Among them, Q L Represents liquid flow; Q g...

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Abstract

The invention provides a micron bubble-generating device and a special cyclone thereof. The cyclone comprises a hollow through cavity consisting of a cylindrical cavity and a truncated-cone shape cavity, wherein the height of the truncated-cone shape cavity, the inner diameter of the upper bottom surface of the truncated-cone shape cavity, the inner diameter of the lower bottom surface of the truncated-cone shape cavity and the height of the cylindrical cavity are in a proportion of 1:(0.2-0.4):(0.8-1.1):(0.28-2.2); the side of the cylindrical cavity is provided with at least one pair of through holes; the lower bottom surface of the cylindrical cavity is provided with a through hole (23); and the upper bottom surface of the truncated-cone shape cavity is provided with a through hole (24). The micron bubble-generating device provided by the invention is formed by connecting the cyclone (2) with a water pump (3) through a pipeline. The particle size of micron bubbles generated by the device is less than 50 microns, and the dissolved oxygen concentration of the micron bubbles can reach a super-saturated state, so that the micron bubbles significantly improve oxygenation capacity and oxygen transfer efficiency, and have good application prospects in sewage treatment, pollution control over rivers and lakes, as well as aquaculture.

Description

technical field [0001] The invention relates to a device for generating micro-bubbles and a special cyclone. Background technique [0002] Aeration is an important process link in the sewage aerobic biochemical treatment system and the pollution control of rivers and lakes. Its main function is to aerate the reactor with oxygen to ensure the dissolved oxygen required for microbial biochemical action, and to keep the microorganisms and substrates in the reactor 1. Dissolved oxygen, that is, the full mixing of mud, water and gas, provides favorable reaction conditions for microbial degradation of organic matter. Traditional aeration methods are divided into blast aeration and mechanical aeration. The blower aeration system includes a blower, an air delivery pipeline and a diffusion device. Most of them use a submerged porous diffuser head or an air nozzle to generate air bubbles and transfer oxygen into the sewage. Mechanical aeration generally uses the rotation of the mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 邢新会吕奉祥初里冰冯权于安峰周军甘一萍
Owner TSINGHUA UNIV
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