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A counter-rotating hydraulic cavitation system

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

Active Publication Date: 2022-02-18
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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  • A counter-rotating hydraulic cavitation system
  • A counter-rotating hydraulic cavitation system
  • A counter-rotating hydraulic cavitation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 The counter-rotating hydraulic cavitation system provided in this embodiment has an overall structure as figure 1 As shown, it mainly includes: a first motor 1, a hollow shaft 5, a volute 9;

[0032] Such as figure 1 As shown, the upper impeller 16 and the lower impeller 17 are arranged symmetrically inside the volute 9, leaving a certain gap between the two impellers. The upper and lower ends of the volute 9 are respectively provided with an upper end cover 10 and a lower end cover 6, and the middle part is cylindrical; the upper end cover 10 and the lower end cover 6 are fixedly connected with the middle cylindrical part by bolts. Such as figure 2 As shown, the inner wall of the volute 9 is provided with a W-shaped structure protruding inward, which are respectively the middle conical structure 9-2 and the Venturi-like structures 9-1 on both sides, and the middle conical structure 9-2 is facing With the gap between the two impellers, the Venturi-like ...

Embodiment 2

[0044] Embodiment 2 The counter-rotating hydraulic cavitation device provided in this embodiment has an overall structure as Figure 9 As shown, the basic structure is the same as that of Embodiment 1, the difference is that in this embodiment, the lower end of the liquid pipe is connected to the external liquid inlet device through a straight pipe 23 .

[0045] In this embodiment, the tooth structure on the upper and lower impellers can be exchanged, for example: the tooth structure on the lower impeller adopts helical teeth, and the angle of rotation and horizontal direction is 5-15, and the tooth shape of the upper impeller The structure adopts a flat ruler, and the included angle with the horizontal direction is 0. This form can achieve the same technical effect as that of Embodiment 1.

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Abstract

The invention relates to water treatment equipment, in particular to a cavitation system used for ship ballast water treatment. A counter-rotating hydraulic cavitation system, including a cavitation device and a driving device; the cavitation device includes two symmetrically arranged impellers, and several tooth-shaped structures are respectively arranged on the opposite surfaces of the two impellers, adjacent to each other. A cavity is formed between the tooth-shaped structures; one end of the cavity is opened at the center of the impeller, and the other end is opened at the outer edge of the impeller; the two impellers rotate in opposite directions under the action of the driving device. In the counter-rotating hydraulic cavitation system of the present invention, when the two impellers counter-rotate in different directions under the action of the driving device, an alternate Venturi tube structure is formed between the two impellers to generate high-intensity cavitation to the water flow; The cavities on the opposite sides of the impeller overlap to form periodic low-pressure areas, which induce secondary cavitation; use the high temperature, high pressure and strong mechanical action generated by cavitation to kill organisms in the water such as microorganisms and algae.

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