AU2021105925A4

AU2021105925A4 - Multifunctional mechanical mixing oxygenator

Info

Publication number: AU2021105925A4
Application number: AU2021105925A
Authority: AU
Inventors: Xin Sun; Xiao Tang
Original assignee: Xian Jinshan Yinshan Technology Co Ltd
Current assignee: Xi'an Jinshan Yinshan Technology Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-10-28
Anticipated expiration: 2029-08-19

Abstract

This invention discloses multifunctional mechanical mixing oxygenator, belonging to technical field of water pollution control, which comprises a hollow shaft, an air inlet pipe, an air flowrate regulating valve, a working platform, aeration blades and a motor driving device, wherein the aeration blades are driven by the motor driving device to rotate to generate negative pressure, so that air is sucked into the hollow shaft and released into the water body, and at the same time, the lift force generated by the rotation of the aeration blades lifts the bottom water body to the upper part so as to realize circulating mixing of the water body; High-speed rotation of aeration blades can chop bubbles, improve oxygen transfer rate and enhance oxygenationperformance, and further enhance oxygenation by using the mixing effect produced by rotation of aeration blades. By controlling the rotating speed of the motor, the free switching between the functions of single mixing and simultaneous mixing and oxygenation can be realized. According to the mechanical mixing oxygenator, the core and key units of mixing oxygenation are placed on the surface layer of the water body, complex air supply equipment and an underwater pipeline system are not needed, the use and maintenance are convenient, the performance of mixing and oxygenation is enhanced, and the investment and operation cost of mixing-oxygenation are reduced. 1/1 FIGURES 1 2 3 4 5 6 Figure 1

Description

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FIGURES

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6 Figure 1

Multifunctional mechanical mixing oxygenator

TECHNICAL FIELD The invention belongs to the field of water pollution control, and particularly relates to a multifunctional mechanical mixing oxygenator, which is suitable for mixing stratified lake and reservoir water bodies and oxygenating the lake and reservoir water bodies, and is also suitable for mixing oxygenation in biological sewage treatment facilities.

BACKGROUND Lakes and reservoirs are the most precious freshwater resources that can be used directly in the world. At the same time, there are three main problems of water pollution in lakes and reservoirs: algae, sediment and dissolved oxygen. Considering the environmental, economic and social benefits of various water pollution control technologies in lakes and reservoirs, aeration and mixing-oxygenation is a relatively good technology at present, and it is also widely used. However, despite the fact that the current aeration and mixing-oxygenation technologies are all aeration and oxygenation in lakes and reservoirs, and at the same time, gas is used to lift the water bodies for mixing, but the most widely used technologies are limited to only adopting single aeration and oxygenation at the bottom of lakes and reservoirs or mechanical stirring and mixing, as well as bottom aeration and lifting water flow for mixing, which have high energy consumption and low energy efficiency (generally below 10%), and have poor adaptability to different water quality improvement needs. There are about 3,800 reservoirs with a storage capacity of over 100 million cubic meters in China, most of which are in a state of eutrophication. Therefore, the research and development of new technologies and devices for mixing-oxygenation, which are economical, efficient and easy to implement, is an urgent technical demand for water pollution control in lakes and reservoirs. In the field of biological sewage treatment, hollow shaft oxygenators with simple structure are also used; However, this kind of oxygenator mainly sucks air from the hollow shaft by driving the hollow shaft by the motor, and enters the water body through the disk aerator at the lower end of the hollow shaft for oxygenation, which only has a single aeration function, but does not have a mixing function, so that its oxygenation efficiency is restricted.

SUMMARY The purpose of the present invention is to provide a multifunctional mechanical mixing oxygenator, which can use a solar-based motor to drive a hollow shaft and aeration blades at the lower end of the hollow shaft to lift and mix upper and lower water bodies of lakes and reservoirs on the surface of water bodies, and at the same time use air from the hollow shaft and aeration blades to oxygenate the water bodies, thus improving the water quality of lakes and reservoirs economically, efficiently and conveniently, and oxygenating biological sewage treatment facilities. In order to achieve the above purpose, the invention is realized by adopting the following technical scheme: The multifunctional mechanical mixing oxygenator comprises a working platform, a motor driving device installed above the working platform, and a hollow shaft vertically penetrating through the working platform, wherein the output end of the motor driving device is connected with one end of the hollow shaft, the other end of the hollow shaft is communicated with an aeration blade with a hollow cavity, and the side wall of the hollow shaft above the working platform is communicated with an air inlet pipe. The further improvement of the invention is that the air inlet pipe is provided with an air flowrate regulating valve. The further improvement of the invention is that the air inlet pipe is communicated with the hollow shaft along the radial direction of the hollow shaft. The further improvement of the invention is that the shape of the working platform is round, square or regular regular polygon. The further improvement of the invention is that the aeration blades are hollow cone blades. The further improvement of the invention is that the number of aeration blades is 2n, and every two aeration blades are symmetrically communicated on the hollow shaft along the radial direction of the hollow shaft.

The further improvement of the invention is that each aeration blade forms an included angle of 13 degrees with the horizontal plane and an included angle of 77 degrees with the hollow shaft. Compared with the prior art, the invention has the following technical effects: According to the multifunctional mechanical mixing oxygenator, a hollow shaft is driven to rotate by a motor driving device, so that aeration blades are driven to rotate to generate negative pressure, air is sucked into the hollow shaft and released into a water body through the aeration blades, meanwhile, the lift force generated by the rotation of the aeration blades lifts the water body at the bottom of a lake reservoir to the upper part, and the water body is circulated up and down to achieve a mixing effect; The high-speed rotation of aeration blades also plays a role in cutting bubbles, thereby improving the oxygen transfer rate and enhancing the oxygenation effect; When the motor speed is low, the aeration blade can only achieve the purpose of mixing water, while when the motor speed is high, the aeration blade can achieve the dual purposes of aeration, oxygenation and mixing, thus achieving different water quality improvement goals of lakes and reservoirs, and optimizing the power consumption and performance of mixing oxygenation. Furthermore, the aeration blades are hollow cone blades, and each aeration blade forms an included angle of 13 degrees with the horizontal plane and an included angle of 77 degrees with the hollow shaft, so as to minimize the head loss when the aeration blades rotate to lift the water body.

BRIEF DESCRIPTION OF THE FIGURES Fig. 1 is a schematic structural diagram of multifunctional mechanical mixing oxygenator according to the present invention; Wherein: 1. Motor driving device, 2. Air inlet pipe, 3. Gas regulating valve, 4. Working platform, 5. Hollow shaft, 6. Aeration blades.

DESCRIPTION OF THE INVENTION The invention will be further described in detail with reference to the attached drawings and specific embodiments. Referring to fig. 1, the multifunctional mechanical mixing oxygenator of the present invention comprises a hollow shaft 5, an air inlet pipe 2, an air flowrate regulating valve 3, a working platform 4, aeration blades 6 and a motor driving device 1. It comprises a working platform 4, a motor driving device 1 installed above the working platform 4, and a hollow shaft 5 vertically penetrating through the working platform 4, wherein the output end of the motor driving device 1 is connected with one end of the hollow shaft 5, and the other end of the hollow shaft 5 is communicated with an aeration blade 6 with a hollow cavity. The working platform 4 can be round, square or regular polygon, and the aeration blades 6 are hollow cone blades. Preferably, the number of aeration blades 6 is 2n (n = 1, 2, 3, ... ), and every two aeration blades 6 are symmetrically communicated on the hollow shaft 5 along the radial direction of the hollow shaft 5. In order to further understand the present invention, its working principle will now be explained. According to the multifunctional mechanical mixing oxygenator, a motor driving device 1 drives a hollow shaft 5 to rotate so as to drive aeration blades 6 to rotate to generate negative pressure, and air is sucked into the hollow shaft 5 and released into a water body; meanwhile, the lifting force generated by the rotation of the aeration blades 6 lifts the water to the upper water body, and the mixing effect is realized during the up-and-down circulation process of the water body. The aeration blade 6 rotates at a high speed to cut up bubbles, thereby increasing the oxygen transfer rate and enhancing the oxygenation effect. The mixing effect caused by the rotation of the aeration blade further improves the oxygenation effect of lakes and reservoirs. Embodiment Referring to Fig.1, each main unit can be disassembled for easy installation and maintenance. The motor driving device 1 selects a 60W AC adjustable speed asynchronous motor, and the hollow shaft 5 has an outer diameter of 10mm, an inner diameter of 8mm and a length of 1000mm. There are 2n(n=1, 2, 3, 4) conical aeration blades 6 in total, and each aeration blade 6 forms an included angle of 13 degrees with the horizontal plane and an included angle of 77 degrees with the hollow shaft, so as to minimize the head loss when the aeration blade rotates to lift the water body. The aeration blade has an outer diameter of 36mm, plastic products, an inner diameter of the air inlet pipe 2 of 8mm, metal products, and an air flowrate regulating valve 3 connected with the air inlet pipe 2 for regulating the air flowrate.

When working, the motor driving device is started, the water in the aeration blade at the lower end of the hollow shaft will be thrown out of the aeration blade due to centrifugal force, and then air will be sucked into the hollow shaft due to negative pressure. When the rotating speed of the motor reaches a certain value, the negative pressure in the hollow shaft will make the sucked air enter the water body through the conical aeration blade at the lower end of the hollow shaft to oxygenate the water body. The motor drives the hollow shaft to drive the conical aeration blade to rotate rapidly, resulting in severe turbulence around the aeration blade. Oxygen in the air is accelerated to be transferred to the water under the main effects of severe turbulence and bubble cutting, and some insoluble air will overflow the water surface; At the same time, the motor drives the hollow shaft to drive the conical aeration blade to rotate rapidly, forming an upward circulating water flow in the water around the aeration blade, which promotes the mixing of the oxygenated water body and the non oxygenated water body in other areas, thereby rapidly increasing the dissolved oxygen concentration in the whole water body and realizing the rapid oxygenation of the water body. When that rotate speed of the motor is lower than a certain value, the negative pressure in the hollow shaft is not enough for the sucked air to enter the water body through the conical aeration blade at the lower end of the hollow shaft, and the multifunctional mixing oxygenator can not oxygenate the water body at this time. The motor drives the hollow shaft to drive the conical aeration blade to rotate rapidly, forming an upward circulating water flow in the water body around the aeration blade, and causing the mixing of various parts of water bodies in the lake and reservoir through the circulating water flow. If it is only necessary to mix water, such as using mixing to control excessive growth and reproduction of algae in lakes and reservoirs, it is necessary to use lower motor speed; If it is necessary to mix water and oxygenation at the same time, if it is necessary to control the overgrowth and oxygenation of algae in lakes and reservoirs at the same time to suppress the endogenous pollution of lake and reservoir sediments, and to efficiently oxygenate biological treatment facilities, higher motor speed can be adopted. The above is a further detailed description of the present invention combined with specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the patent protection scope determined by the submitted claims.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS: 1. Multifunctional mechanical mixing oxygenator is characterized in comprising a working platform (4), a motor driving device (1) arranged above the working platform (4), a hollow shaft (5) vertically penetrating the working platform (4), The other end of the hollow shaft (5) is communicated with an aeration blade (6) with a hollow cavity, and the side wall of the hollow shaft (5) above the working platform (4) is communicated with an air inlet pipe (2).
2. Multifunctional mechanical mixing oxygenator, according to claim 1, is characterized in that the air inlet pipe (2) is provided with an air flowrate regulating valve (3).
3. Multifunctional mechanical mixing oxygenator, according to claim 1, is characterized in that the air inlet pipe (2) is communicated with the hollow shaft (5) along the radial direction of the hollow shaft (5).
4. Multifunctional mechanical mixing oxygenator, according to claim 1, is characterized in that the working platform (4) is round, square or regular polygon.
5. Multifunctional mechanical mixing oxygenator, according to claim 1, is characterized in that the aeration blade (6) is a hollow cone blade.
6. Multifunctional mechanical mixing oxygenator, according to claim 1, is characterized in that there are 2n aeration blades (6), and every two aeration blades (6) are symmetrically communicated on the hollow shaft (5) along the radial direction of the hollow shaft (5).
7. Multifunctional mechanical mixing oxygenator, according to claim 1 or claim 6, is characterized in that each aeration blade (6) forms an included angle of 13 degrees with the horizontal plane and 77 degrees with the hollow shaft.

Figure 1 FIGURES 1/1