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Contra-rotating hydrodynamic cavitation system

A hydraulic cavitation and cavitation technology, which is applied in natural water treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high energy consumption, restrictions on ship economic indicators, and low treatment efficiency. Achieve the effects of low energy consumption, meeting the economic indicators of ships, and high processing efficiency

Active Publication Date: 2021-10-29
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering that the treatment capacity of ship ballast water is relatively large, the treatment efficiency of the current method is low, it is easy to produce secondary harmful media, and the energy consumption is large, which seriously restricts the economic index of ships

Method used

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  • Contra-rotating hydrodynamic cavitation system
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  • Contra-rotating hydrodynamic cavitation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 This embodiment is provided for a turntable air conditioning system, and its overall structure is figure 1 As shown, the first motor 1, the hollow shaft 5, the volute 9; the upper impeller 16, the lower impeller 17, the second motor 15, the swirling fluid tube 23, the flow tube 20, and the vortex diode 24.

[0032] like figure 1 As shown, the upper impeller 16 and the lower impeller 17 are symmetrically disposed inside the volute 9, and there is a gap between the two impelings. On the upper and lower ends of the volute 9, the upper end cover 10 and the lower end cover 6 are respectively provided, and the intermediate portion is cylindrical; the upper cover 10 and the lower end cover 6 secure the connection with the middle cylindrical portion by bolts. like figure 2 As shown, the inner wall of the volute 9 is provided inwardly protruding W-type structures, respectively, the intermediate tapered structure 9-2 and the two sides of the texture structure 9-1, the mi...

Embodiment 2

[0044] Embodiment 2 This embodiment is provided for a turntable airway, and its overall structure is Figure 9 As shown, the basic structure is the same as that of Example 1, and in the present embodiment, the lower end of the vifferential tube is connected to the outer feed apparatus by a straight tube 23.

[0045] In the present embodiment, the toothed structure on the lower impeller can be interchangeable, for example, the tooth structure on the lower impeller wheel adopts a slope tooth, a angle of 5-15 in the direction of the rotation direction, and the upper impeller. The structure is applied, and the angle between the horizontal direction is 0, which can be achieved with the same technical effects as in Example 1.

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PUM

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Abstract

The invention relates to water treatment equipment, in particular to a cavitation system for ship ballast water treatment. The invention discloses a contra-rotating hydrodynamic cavitation system. The system comprises a cavitation device and a driving device. The cavitation device comprises two symmetrically-arranged impellers, a plurality of tooth-shaped structures are arranged on the opposite faces of the two impellers respectively, and a cavity is formed between every two adjacent tooth-shaped structures. One end of the cavity is opened in the center of the impeller, and the other end of the cavity is opened in the outer edge of the impeller; and the two impellers rotate in opposite directions under the action of the driving device. According to the contra-rotating hydrodynamic cavitation system, when the two impellers oppositely rotate in different directions under the action of the driving device, an alternate Venturi tube structure is formed between the two impellers, and high-strength cavitation is generated on water flow; after the cavities on the opposite surfaces of the two impellers are overlapped, a periodic low-pressure area is formed, and secondary cavitation is induced; and living bodies such as microorganisms, algae and the like in water are killed by utilizing high temperature and high pressure generated by cavitation and a strong mechanical effect.

Description

technical field [0001] The invention relates to water treatment equipment, in particular to a cavitation device used for treatment of ship ballast water. Background technique [0002] As we all know, most of the international trade is dominated by ocean shipping. According to statistics, 80% of the transportation volume in international trade is carried out by sea transportation. When the ship is empty and full, the position of the waterline will change. In order to ensure the safety and economy of the empty voyage, it is necessary to fill part of the ballast tank of the ship with water to maintain the waterline during the empty voyage. [0003] For ships that are empty or under a light load, it is necessary to ensure the depth of the propeller into the water and ensure safe navigation when empty, so the water (sea water, lake water or river water) in the port is taken to pressure before leaving the port. tanks to serve as ballast water. [0004] Ship ballast water contai...

Claims

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Application Information

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IPC IPC(8): C02F1/34
CPCC02F1/34C02F2103/008C02F2303/04
Inventor 别海燕任万龙郝宗睿
Owner OCEAN UNIV OF CHINA