CN112811483A

CN112811483A - Green sewage treatment plant

Info

Publication number: CN112811483A
Application number: CN202110014388.0A
Authority: CN
Inventors: 朱荣生; 陈一鸣; 王秀礼; 付强
Original assignee: Jiangsu University
Current assignee: Jiangsu Jingchuan Water Equipment Co ltd; Jiangsu University
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-18
Anticipated expiration: 2041-01-06
Also published as: CN112811483B

Abstract

The invention provides a green environment-friendly sewage treatment device which comprises a shell, a cavitation device and a driving part, wherein the cavitation device comprises a shaft sleeve, a front plate, a rear plate and an arc-shaped annular plate, one end of the front plate is hermetically connected with one end of the rear plate through the arc-shaped annular plate, the other end of the front plate and the other end of the rear plate are arranged on the shaft sleeve, a cavity among the shaft sleeve, the front plate, the rear plate and the arc-shaped annular plate is a cavitation cavity, and the shaft sleeve is connected with the driving part and used for enabling the cavitation cavity to rotate; the front plate is provided with a plurality of inlet holes, and the arc-shaped ring plate is provided with a plurality of outlet holes. The invention uses cavitation bubbles generated in the cavitation device and utilizes the physical and chemical changes generated by the collapse of the cavitation bubbles to rapidly treat the sewage.

Description

Green sewage treatment plant

Technical Field

The invention relates to the field of sewage treatment or cavitation, in particular to a green environment-friendly sewage treatment device.

Background

In recent years, with the continuous development of modern industries such as pharmacy, chemical industry, printing and dyeing and the like, the amount of sewage increases year by year, and particularly, the pollution of pollutants to water forms a serious threat to human survival and social development. Meanwhile, the components of the pollutants are more and more complex, and a plurality of defects existing in the traditional sewage treatment methods such as a hydrolysis method, a photocatalytic oxidation method and other physicochemical treatment methods are gradually highlighted along with the more and more complex components of the pollutants. Macromolecular organic matters and refractory chemical substances contained in organic sewage increase year by year, and the traditional sewage treatment method is difficult to adapt to the current increasingly strict environmental protection requirements, so that the development of a novel sewage treatment method is urgent.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a green environment-friendly sewage treatment device, which is used for quickly treating sewage by cavitation bubbles generated in a cavitation device and physical and chemical changes generated by collapse of the cavitation bubbles.

The present invention achieves the above-described object by the following technical means.

A green environment-friendly sewage treatment device comprises a shell, a cavitation device and a driving part, wherein the cavitation device comprises a shaft sleeve, a front plate, a rear plate and an arc-shaped annular plate, one end of the front plate is hermetically connected with one end of the rear plate through the arc-shaped annular plate, the other end of the front plate and the other end of the rear plate are installed on the shaft sleeve, a cavity among the shaft sleeve, the front plate, the rear plate and the arc-shaped annular plate is a cavitation cavity, and the shaft sleeve is connected with the driving part and used for enabling the cavitation cavity to rotate; the front plate is provided with a plurality of inlet holes, and the arc-shaped ring plate is provided with a plurality of outlet holes.

Furthermore, in the cavitation cavity, the distance between the front plate close to one end of the shaft sleeve and the rear plate close to one end of the shaft sleeve is smaller than the distance between the other end of the front plate and the arc-shaped annular plate connected with the other end of the rear plate.

Furthermore, the cross section of the arc-shaped ring plate is C-shaped, and the vertical distance between two ends of the C-shaped cross section is larger than the distance between the front plate close to one end of the shaft sleeve and the rear plate close to one end of the shaft sleeve.

Furthermore, a plurality of flow adapting blades are arranged on the front plate in the cavitation cavity and are close to the arc-shaped annular plate, so that cavitation bubbles in the cavitation cavity are quickly formed.

Furthermore, a plurality of the flow-adapting blades are uniformly distributed or staggered on the front plate.

Furthermore, a plurality of flow guide blocks are arranged on the rear plate in the cavitation cavity, the flow guide blocks and the inlet holes are distributed in a staggered mode, and cavitation bubbles in the cavitation cavity are quickly formed through the alternate change of the fluid cross section.

Furthermore, a divergent pipe is arranged on the front plate close to the inlet of the shell, and guide plates are uniformly distributed in the divergent pipe to rectify incoming flow at the inlet.

Furthermore, the outlet hole and the inlet hole are gradually expanded according to the flow direction, so that the collapse of the cavity is accelerated when the inlet hole and the outlet hole rotate.

Further, the cross-sectional shapes of the outlet hole and the inlet hole are tapered or stepped.

The invention has the beneficial effects that:

according to the environment-friendly sewage treatment device, the cavitation device is arranged, the cavitation bubbles are quickly formed by combining rotation and gradual hole expansion, and sewage is quickly treated according to physical and chemical changes generated by collapse of the cavitation bubbles. When the inlet and outlet holes arranged on the cavitation generator rotate, a shearing effect is generated in the medium, and the collapse of bubbles can be accelerated. The device has the advantages of simple structure, small occupied space, simplicity in operation, high production efficiency and better economic benefit.

Drawings

FIG. 1 is a schematic structural view of an environment-friendly sewage treatment plant according to the present invention.

FIG. 2 is a structural view of the cavitation apparatus according to example 1.

FIG. 3 is a structural view of a cavitation device according to example 2.

FIG. 4 is a structural view of a cavitation device according to example 3.

FIG. 5 is a structural view of a cavitation apparatus according to example 4.

In the figure:

1-water inlet pipe; 2-housing, 201-housing cavity; 3-cavitation device, 301-inlet hole, 302-back plate, 303-cavitation cavity, 304-outlet hole, 305-front plate, 306-adaptive flow blade, 307-guide block, 308-guide plate; 4-mechanical sealing and pressing cover; 5-oil chamber; 6-locking the nut; 7-a rotating shaft; 8-machine sealing; 9-a motor bracket; 10-motor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the green environmental protection sewage treatment device of the invention comprises a water inlet pipe 1, a shell 2, a shell cavity 201, a cavitation device 3, a mechanical seal gland 4, an oil chamber 5, a lock nut 6, a rotating shaft 7, a mechanical seal 8, a motor bracket 9 and a motor 10, wherein the water inlet pipe 1 is arranged on one side of the shell 2, and the oil chamber 5 is arranged on the other side; a cavitation device 3 is arranged in a shell cavity 201 in the shell 2; one side of the oil chamber 5 is fixed with the shell 2, and the other side of the oil chamber is fixed with the motor bracket 9; the mechanical seal gland 4 fixes the mechanical seal 8 in the oil chamber 5; the motor bracket 9 is fixed with the motor 10; the cavitation generator 3 is arranged on the rotating shaft 7, and the locking nut 6 fixes the cavitation device 3 in the shell cavity 201. The inlet pipe 1 is internally provided with a contraction section, a direct flow section and a diffusion section in sequence according to the flow direction, so that the flow velocity of incoming flow at the inlet can be increased.

Embodiment 1 as shown in fig. 2, the cavitation apparatus 3 includes a shaft sleeve, a front plate 305, a rear plate 302 and an arc-shaped ring plate, one end of the front plate 305 and one end of the rear plate 302 are connected in a closed manner by the arc-shaped ring plate, the other end of the front plate 305 and the other end of the rear plate 302 are mounted on the shaft sleeve, a cavity among the shaft sleeve, the front plate, the rear plate and the arc-shaped ring plate is a cavitation cavity 303, the shaft sleeve is connected with a rotating shaft 7, and the cavitation cavity 303 is rotated by a motor; a plurality of inlet holes 301 are arranged on the front plate, and a plurality of outlet holes 304 are arranged on the arc-shaped ring plate. The cross section of the arc-shaped ring plate is C-shaped, and in the cavitation cavity 303, the distance between a front plate 305 close to one end of the shaft sleeve and a rear plate 302 close to one end of the shaft sleeve is smaller than the vertical distance between two ends of the C-shaped cross section. It can be seen in fig. 2 that the flow area within the cavitation chamber 303 at the inlet is smaller than the flow area at the outlet. The cavitation chamber 303 may be viewed as having a "n" shape similar to the axial plane, with the upper space being larger than the space near the bottom of the sleeve. The ratio of the flow area in the cavitation cavity 303 at the inlet to the flow area at the outlet is generally 0.4-0.6, so that the collapse of partial bubbles at the outlet can be accelerated.

As shown in fig. 2, a plurality of flow-adapting blades 306 are arranged on a front plate 305 in the cavitation cavity 303, the flow-adapting blades 306 are close to an arc-shaped ring plate, and the flow-adapting blades 306 are uniformly distributed or staggered on the front plate 305. A row of flow guide blocks 307 are arranged on the rear plate 302 in the cavitation cavity 303, so that cavitation bubbles in the cavitation cavity are quickly formed.

Embodiment 2 as shown in fig. 3, a divergent pipe is arranged on the front plate 305 near the inlet of the housing 2, a plurality of rows of flow guide blocks 307 are uniformly distributed on the rear plate 302 in the cavitation chamber 303, and the flow guide blocks 307 and the inlet holes 301 are distributed in a staggered manner. Through the alternating change of the fluid section, the cavitation bubbles in the cavitation cavity are quickly formed.

Embodiment 3 as shown in fig. 4, in embodiment 3, compared with embodiment 2, the inlet holes 301 may be rectangular holes or square holes.

Embodiment 4 as shown in fig. 5, in embodiment 4, compared with embodiment 2, the baffles 308 are uniformly distributed in the divergent pipe to rectify the incoming flow.

The outlet aperture 304 and the inlet aperture 301 diverge in flow direction. The cross-sectional shapes of the outlet holes 304 and the inlet holes 301 are tapered or stepped.

The working principle of the invention is as follows:

the sewage medium enters the shell from the water inlet pipe 1, and provides a part of pressure for the sewage medium through contraction and diffusion of the water inlet pipe 1. After pressurization, the sewage medium enters the cavitation cavity 303 from the inlet hole 301, the cross-sectional area is contracted to the maximum, the medium flow velocity is also maximized, the pressure at the position is the lowest according to the Bernoulli equation, and cavitation bubbles are generated when the pressure is equal to the saturated steam pressure. Then, in the cavitation cavity 303, the flow velocity of the sewage medium is reduced and the pressure is increased by the rectification action of the flow adapting blades 306 and the flow guide blocks 307, and due to the instant increase, part of the bubbles are collapsed, so that the pressure and the temperature are increased due to the collapse of the bubbles, harmful substances in the sewage are subjected to physical and chemical actions, and the circulation quality of the sewage medium is improved. Because the cavitation device 3 is in rotary operation during operation, vortices and supercavitation are generated in the cavitation cavity 303, and further cavitation is enhanced. The generated cavitation bubbles pass through the outlet hole 304 and enter the housing cavity 201, and the cavitation collapse chamber. The cavity has larger space, the flow state is not disturbed by the outside, the pressure is rapidly increased, the cavitation bubbles are collapsed, the physical and chemical effects caused by the collapse of the bubbles are acted on the fluid, and finally the aim of cavitation and degradation of harmful substances is achieved.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The environment-friendly sewage treatment device is characterized by comprising a shell (2), a cavitation device (3) and a driving part, wherein the cavitation device (3) comprises a shaft sleeve, a front plate (305), a rear plate (302) and an arc-shaped annular plate, one end of the front plate (305) is hermetically connected with one end of the rear plate (302) through the arc-shaped annular plate, the other end of the front plate (305) and the other end of the rear plate (302) are arranged on the shaft sleeve, a cavity among the shaft sleeve, the front plate (305), the rear plate (302) and the arc-shaped annular plate is a cavitation cavity (303), and the shaft sleeve is connected with the driving part and used for enabling the cavitation cavity (303) to rotate; the front plate (305) is provided with a plurality of inlet holes (301), and the arc-shaped ring plate is provided with a plurality of outlet holes (304).

2. The sewage treatment apparatus in green environmental protection according to claim 1, wherein in the cavitation chamber (303), the distance between the front plate (305) near one end of the shaft sleeve and the rear plate (302) near one end of the shaft sleeve is smaller than the distance between the arc-shaped ring plates connected with the other end of the front plate (305) and the other end of the rear plate (302).

3. The sewage treatment device in green environmental protection according to claim 2, wherein the cross section of the arc-shaped ring plate is C-shaped, and the vertical distance between the two ends of the C-shaped cross section is larger than the distance between the front plate (305) near one end of the shaft sleeve and the rear plate (302) near one end of the shaft sleeve.

4. The green environmental protection sewage treatment device according to claim 1, wherein a plurality of flow-adapting blades (306) are arranged on the front plate (305) in the cavitation chamber (303), and the flow-adapting blades (306) are close to the arc-shaped annular plate.

5. The sewage treatment device in green environmental protection according to claim 4, wherein a plurality of said flow-adapting blades (306) are uniformly distributed or staggered on the front plate (305).

6. The green environmental protection sewage treatment device according to claim 4, wherein a plurality of flow guide blocks (307) are arranged on the rear plate (302) in the cavitation chamber (303), and the flow guide blocks (307) are distributed with the inlet holes (301) in a staggered manner.

7. The sewage treatment plant of claim 1, wherein a divergent pipe is arranged on the front plate (305) near the inlet of the housing (2), and a guide plate (308) is distributed in the divergent pipe.

8. The green environmental protection sewage treatment plant according to any of claims 1 to 7 wherein the outlet aperture (304) and the inlet aperture (301) are divergent in flow direction.

9. The green environmental protection sewage treatment device according to claim 1 wherein the cross-sectional shapes of the outlet hole (304) and the inlet hole (301) are tapered or stepped.