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High-efficiency rotary circulation oxygenation and gas distribution device

A gas distribution device and high-efficiency technology, applied in water aeration, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of uneven gas distribution at the gas outlet and limited efficiency improvement, and improve material utilization efficiency, save device cost, and simplify the effect of mechanical agitation and oxygenation structure

Pending Publication Date: 2020-06-19
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as uneven dispersion of gas at the gas outlet and limited efficiency improvement

Method used

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  • High-efficiency rotary circulation oxygenation and gas distribution device
  • High-efficiency rotary circulation oxygenation and gas distribution device
  • High-efficiency rotary circulation oxygenation and gas distribution device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] application figure 1 Described device, in diameter 1300mm, in the container 6 of height 1500mm, add 1500L clear water and 1kg calcium carbonate powder (act as the impurity in water) to adopt 3 fan-shaped nozzles (straight-through jet nozzle), 2 wide-angle nozzles (dynamic sputtering nozzle) ) with a rotating nozzle installed and polymer material sliding bearings, measured at a liquid flow rate of 6m 3 When using different polymer materials for the bearing base and the sliding gasket of the sliding bearing of the rotating nozzle, the rotation stability of the rotating nozzle is investigated. The experiment shows that the materials that can be selected for the base include polyamide (PA), oily polyamide, Polytetrafluoroethylene (PTFE), modified polytetrafluoroethylene, P EEK, modified paraformaldehyde (POM), gasket material can choose polyamide (PA), oily polyamide, polytetrafluoroethylene (PTFE), modified Non-toxic PTFE, P EEK, paraformaldehyde (POM). Among them, the c...

Embodiment 2

[0065] application figure 1 In the described device, 1500L of clear water is filled in a container 6 with a diameter of 1300mm and a height of 1500mm, and 3 fan-shaped nozzles (straight-through jet nozzles), 2 wide-angle nozzles (power sputtering nozzles) and a rotating rotary bearing for sliding bearings of polymer materials are used. Nozzle, effective aspect ratio 1.25:1, using Na 2 SO 3 The dissolved oxygen in the water is consumed to about 4mg / L, and the air flow rate is 9m 3 / h, the liquid flow is 7m 3 / h, when the dissolved oxygen is from 4mg / L to 7.5mg / L, the dissolved oxygen change curve under different gas outlet areas of the nozzle, the results are as follows Figure 7 As shown, it can be seen that when the outlet area of ​​the air duct is not greater than the gas cross-sectional area of ​​the annulus, the oxygenation time is significantly shortened and the oxygenation performance is enhanced.

Embodiment 3

[0067] application figure 1 The device measures the rotating speed of the rotor of the rotating nozzle at a certain liquid flow rate and different air flow rates, and fills 1500L of clear water into a container 6 with a diameter of 1300mm and a height of 1500mm, with a height-to-diameter ratio of 1.25:1, using 3 fan-shaped nozzles (straight-through jet nozzle), 2 wide-angle nozzles (power sputtering nozzle) and a rotary nozzle installed with polymer material sliding bearings, measured at a liquid flow rate of 6m 3 / h, the rotor speed and aerobic power efficiency under different airflows, the results are shown in Table 1. It can be seen that increasing the gas flow rate strengthens the axial circulation, reduces the density and resistance of the mixed phase, increases the rotational speed, and continuously improves the dissolved oxygen efficiency.

[0068] Table 1 The liquid volume is fixed, the influence of gas flow rate changes on the rotational speed and aerobic power effic...

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Abstract

The invention provides a high-efficiency rotary circulation oxygenation and gas distribution device. The device comprises a liquid pump, an air compressor and a double-channel liquid spraying and gasdistributing rotary spray head, the device uses the liquid pump and the air compressor to send liquid and gas into the integrated double-channel liquid spraying and gas distributing rotary spray head,the liquid is pumped into a liquid flow guide pipe of the spray head from the liquid pump, and the gas is introduced from an interlayer outside a liquid flow guide pipe of the rotary spray head. Theinvention provides a novel efficient oxygenation mode with a wide water surface and a large water volume. The structure and the fixing and moving operation conditions of the rotary spray head are optimized, the dispersion of the gas in the liquid is more effectively realized, the defects of bubble coalescence, non-uniform dissolved oxygen in water or oxygen deficiency at the bottom are overcome, the oxygen dissolving efficiency can be greatly improved by about 5 times compared with that of early-stage rotary circulation oxygenation equipment, compared with an existing aeration mode, the powerefficiency in the moving mode is more than two times that in the existing aeration mode, application experiments prove that rapid aeration and remarkable energy conservation and consumption reductioncan be achieved in large water or a large water volume system, and huge application prospects in the fields of water body pollution treatment, aquaculture and biological fermentation are shown.

Description

technical field [0001] The invention relates to a high-efficiency swirl flow oxygen-increasing gas distribution device, which is suitable for high-efficiency oxygen-increasing in large capacity or wide water surface, belongs to process intensification technology, and can be widely used in the fields of water body pollution control, aquaculture, biological fermentation and the like. Background technique [0002] The most common mixing is mechanical agitation mixing, and there are also technologies such as jet mixing and bubbling mixing that enhance turbulence and improve mixing effects. The invention takes the mixed oxygenation of water body as the research system. The dissolved oxygen double film theory holds that the mass transfer resistance of oxygen in water is mainly concentrated on the side of the liquid film, maintaining a high gas-liquid mass transfer driving force, increasing the gas-liquid contact area and prolonging the gas-liquid contact time are the keys to effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F7/00
CPCC02F7/00Y02W10/10
Inventor 尹应武刘枫刘小舟师雪琴吐松叶李艺高玉兴张海双何达超尹海超
Owner XIAMEN UNIV