CN110902756A

CN110902756A - Sewage green treatment device

Info

Publication number: CN110902756A
Application number: CN201911159210.4A
Authority: CN
Inventors: 徐伟; 王秀礼; 朱荣生; 安策; 赵媛媛; 林彬; 赵付建; 陈一鸣
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-24
Anticipated expiration: 2039-11-22
Also published as: CN110902756B

Abstract

The invention provides a sewage green treatment device, which comprises a shell, a static hole sleeve and a rotary cavitation generating device, wherein the shell is provided with a plurality of static holes; the rotary cavitation generating device is arranged in the shell; the rotary cavitation generating device is connected with the power part; the inner wall of the shell is provided with a static hole sleeve for forming a steady flow space between the shell and the static hole sleeve; and the static hole sleeve is provided with a plurality of channels for communicating the steady flow space with the rotary cavitation generating device. The rotary cavitation generating device comprises a rotating shaft, rotating blades, a rotating disk and a second gradually-expanded hole; the rotating shaft is supported in the shell, and one end of the rotating shaft is connected with the power part; the other end of the rotating shaft is in transmission connection with a rotating disc, and rotating blades are uniformly distributed on the rotating disc in the circumferential direction; and the center of the rotating disk is provided with a plurality of second gradually-expanded holes for enabling fluid to enter the collapse area. The invention treats domestic sewage by controlling the formation of cavitation bubbles for many times, and rapidly treats fluid by utilizing physical and chemical changes caused by the collapse of the cavitation bubbles.

Description

Sewage green treatment device

Technical Field

The invention relates to the field of sewage treatment, in particular to a sewage green treatment device.

Background

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, the components of pollutants are more and more complex, and the traditional sewage treatment method is not satisfactory. Physical and chemical treatment methods such as a hydrolysis method, a photocatalytic oxidation method and the like have prominent remarkable effects when being put into practice, but a plurality of defects existing in the methods gradually emerge prominently as the components of pollutants are more and more complex. The hydrolysis method has the problems of large acid and alkali consumption, large water resource consumption for further dilution after hydrolysis and the like. Although the photocatalytic oxidation method has high oxidation efficiency, a series of problems of high medicament cost, complex reaction device, high treatment cost and the like exist, macromolecular organic matters and refractory chemical substances artificially synthesized in water increase year by year, and the traditional sewage treatment method is difficult to adapt to the current increasingly strict environmental protection requirement, so that the development of a novel sewage treatment method and a technical process is urgent.

The prior art discloses an angle-type cavitation generator, which comprises a shell, a primary cavitation sleeve, a secondary cavitation sleeve, a tertiary cavitation sleeve, a sealing ring and a bottom cover. Multiple rows of conical holes similar to a Venturi type are distributed on each stage of cavitation sleeve. Although the patent is simple in structure and easy to process, the settled domestic sewage is emphasized, the total number of the three-stage cavitation sleeves is too large, the energy loss is serious, and the flow blockage can occur to influence the further progress of cavitation.

The prior art discloses a vortex cavitation device, which comprises a water inlet pipe, a vortex bin, a cavitation block and a baffle plate. The device passes through the inlet tube by the organic sewage of certain pressure and velocity of flow, because certain low pressure, the organic sewage gets into double helix slot and takes place the cavitation in cavitation storehouse promptly, and the organic sewage that takes place the cavitation further accelerates the speed of rivers through the cavitation piece takes place the cavitation, discharges through the toper aperture in bottom and has the baffle of cavitation bubble organic sewage impact below and lead to the cavitation collapse, strengthens the cavitation effect. Although the device has a simple structure, the energy loss is large.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a sewage green treatment device, which treats domestic sewage by controlling the formation of cavitation bubbles for many times, wherein the cavitation bubbles are used as independent chemical micro-reactors, and physical and chemical changes caused by the collapse of the cavitation bubbles are utilized to quickly treat fluid.

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

A sewage green treatment device comprises a shell, a static hole sleeve and a rotary cavitation generating device; the rotary cavitation generating device is arranged in the shell and is used for generating at least 2 kinds of cavitation; the rotary cavitation generating device is connected with the power part; the inner wall of the shell is provided with a static hole sleeve for forming a steady flow space between the shell and the static hole sleeve; and the static hole sleeve is provided with a plurality of channels for communicating the steady flow space with the rotary cavitation generating device.

Further, the rotary cavitation generating device comprises a rotary shaft, rotary blades, a rotary disk and a second gradually-enlarged hole; the rotating shaft is supported in the shell, and one end of the rotating shaft is connected with the power part; the other end of the rotating shaft is in transmission connection with a rotating disc, and rotating blades are uniformly distributed on the rotating disc in the circumferential direction and used for generating vortices and supercavitation; and the center of the rotating disk is provided with a plurality of second gradually-expanded holes for enabling fluid to enter the collapse area.

Further, a rotary sealing device is arranged between the rotating disc and the inner wall of the shell and used for sealing.

Furthermore, the number of the rotating blades which are uniformly distributed in the circumferential direction is more than or equal to 3, the rotating blades are of an airfoil-shaped structure, and pressure difference exists between two sides of the rotating blades of the airfoil-shaped structure when the rotating blades rotate.

Furthermore, a rotating impeller is arranged on the rotating shaft and is positioned at the rotation center of the rotating blades.

Furthermore, a plurality of first gradually-expanded holes are uniformly distributed on the static hole sleeve and used for enabling the medium to gradually expand from the steady flow space and flow into the rotary cavitation generating device.

Further, the number of the first gradually-enlarged holes on the same circumference is more than or equal to 3, and the number of the rows of the first gradually-enlarged holes in the axial direction is more than or equal to 2.

The invention has the beneficial effects that:

1. the sewage green treatment device disclosed by the invention realizes various cavitation forms by combining rotation and divergent holes.

2. The sewage green treatment device disclosed by the invention is small in occupied space, simple to operate and high in production efficiency.

3. The sewage green treatment device provided by the invention provides power for flowing through the rotating impeller of the rotating cavitation generating device, so that the fluid does not stay in the device for too long, and the purpose of uniformly treating the fluid is achieved.

4. The sewage green treatment device provided by the invention drives the rotary cavitation generating device through the motor to achieve the purposes of energy supply and rapid fluid change.

5. The sewage green treatment device provided by the invention can be used for shearing fluid through the gradually-expanded hole on the rotating disc when rotating, so that the collapse of bubbles can be accelerated.

Drawings

FIG. 1 is a schematic structural view of a sewage green treatment device according to the present invention.

Fig. 2 is a front view of a static hole sleeve according to the present invention.

Fig. 3 is a front view of the rotary cavitation generator according to the present invention.

Fig. 4 is a left side view of the rotary cavitation generating device according to the present invention.

In the figure:

1-a water inlet shell; 2-static hole sleeve; 3-a first sleeve; 4-a rotating cavitation generating device; 5-water outlet shell; 6-second shaft sleeve; 7-a motor; 201-first taper hole; 401-axis of rotation; 402-rotating blades; 403-rotary sealing means; 404-rotating the disc; 405-a second tapered bore; 406-rotating impeller.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1 and 2, the sewage green treatment device of the present invention comprises a housing, a static hole sleeve 2 and a rotary cavitation generating device 4; the shell comprises a water inlet shell 1 and a water outlet shell 5, the water inlet shell 1 and the water outlet shell 5 are installed through flange structures, and the two shells are sealed; a first shaft sleeve 3 is arranged in the static hole sleeve 2, a second shaft sleeve 6 is arranged in the water outlet shell 5, and the rotary cavitation generating device 4 is supported between the first shaft sleeve 1 and the second shaft sleeve 6 and is used for generating at least 2 kinds of cavitation; the rotary cavitation generating device 4 is connected with a motor 7 for providing power. The shaft sleeve and the shell are in interference fit, and the shaft sleeve are in clearance fit; the inner wall of the water inlet shell 1 is provided with a static hole sleeve 2 for forming a steady flow space between the shell and the static hole sleeve 2; and a plurality of channels for communicating the steady flow space with the rotary cavitation generating device 4 are arranged on the static hole sleeve 2. A plurality of first gradually-enlarged holes 201 are uniformly distributed on the static hole sleeve 2. The arrows in fig. 1 represent the flowing direction of the fluid, the fluid firstly enters the steady flow space from the water inlet housing 1, and then enters the housing from the first gradually-enlarged hole 201, and the static hole sleeve 2 is provided with a plurality of first gradually-enlarged holes 201 communicated with the housing; the first gradually-enlarged holes 201 on the static hole sleeve 2 are uniformly distributed in the circumferential direction; the number of the first gradually-enlarged holes 201 on the same circumference is more than or equal to 3, and the number of the rows of the first gradually-enlarged holes 201 in the axial direction is more than or equal to 2.

As shown in fig. 3, the cavitation rotation device 4 includes a rotation shaft 401, a rotation blade 402, a rotation sealing device 403, a rotation disk 404, a divergent hole 405, and a rotation impeller 406; one end of the rotating shaft 401 is supported by the water inlet housing 1 through the first shaft sleeve 3, and the other end of the rotating shaft 401 is supported by the water outlet housing 5 through the second shaft sleeve 6; the rotating blades 402 are uniformly distributed in the circumferential direction, and blade roots are arranged at corresponding positions of the rotating disk 404 through the rotating blades 402; second gradually-enlarged holes 405 are uniformly distributed on the periphery of the center of the rotating disc 404, and the second gradually-enlarged holes 405 enable fluid to smoothly enter a collapse area; a rotary sealing device 403 is arranged between the rotary disc 404 and the inner wall of the water outlet shell 5 for sealing. The rotating impeller 406 provides motive force to the flow so that the fluid does not stay in the apparatus too long for uniform treatment of the fluid.

When the rotating cavitation generating device 4 rotates, vortex cavitation is generated; cavitation is also generated by the streamlined profile of the rotating blades 402, which results in repeated generation and partial collapse of cavitation during rotation. The rotating disc 404 forms a main cavitation collapse zone with the water outlet housing 5.

The working principle of the invention is as follows:

the fluid enters from the first gradually-enlarged hole 201 of the static hole sleeve 2 (as shown by the arrow direction), the interface of the fluid is contracted to the maximum at the position just before the fluid enters the hole, the flow rate is also maximized along with the maximum, according to the bernoulli equation, the pressure at the position is the lowest, and cavitation starts to occur when the pressure is equal to the saturated steam pressure, because the first gradually-enlarged hole 201 is a gradually-enlarged hole, the pressure is increased along with the increase of the pressure, when the fluid flows out of the first gradually-enlarged hole 201 and enters the space formed by the rotating blades 402 and the static hole sleeve 2, the flow rate is reduced, the pressure is increased, and the pressure is increased instantly increased, part of bubbles are collapsed, 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.

The vortex and the super-cavitation are generated due to the stirring of the rotating blades 402, and further the enhanced cavitation is carried out; and the streamline shape of the rotating blade 402 can bring cavitation, the fluid after strengthening cavitation enters the rotating disk 404 through the second divergent hole 405 and forms a main cavitation collapse area with the water outlet shell 5, the space of the part is large, disturbance is avoided, the pressure is rapidly increased, the cavitation is collapsed, the physical and chemical effects brought by the collapse of the bubble are applied to the fluid, and finally the aim of cavitation degradation of harmful substances is achieved, so that multiple times of cavitation is realized.

The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A sewage green treatment device is characterized by comprising a shell, a static hole sleeve (2) and a rotary cavitation generating device (4); the rotary cavitation generating device (4) is arranged in the shell and is used for generating at least 2 kinds of cavitation; the rotary cavitation generating device (4) is connected with the power part; the inner wall of the shell is provided with a static hole sleeve (2) for forming a steady flow space between the shell and the static hole sleeve (2); the static hole sleeve (2) is provided with a plurality of channels for communicating the static flow space with the rotary cavitation generating device (4).

2. The sewage green treatment device according to claim 1, wherein the rotary cavitation generating device (4) comprises a rotary shaft (401), rotary blades (402), a rotary disk (404) and a second gradually-enlarged hole (405); the rotating shaft (401) is supported in the shell, and one end of the rotating shaft (401) is connected with the power part; the other end of the rotating shaft (401) is in transmission connection with a rotating disc (404), and rotating blades (402) are uniformly distributed on the rotating disc (404) in the circumferential direction and used for generating vortices and supercavitation; the center of the rotating disc (404) is provided with a plurality of second gradually-enlarged holes (405) for enabling the fluid to enter the collapse area.

3. The sewage green treatment device according to claim 2, wherein a rotary sealing device (403) is installed between the rotary disk (404) and the inner wall of the shell for sealing.

4. The sewage green treatment device according to claim 2, wherein the number of the rotating blades (402) is equal to or more than 3, the rotating blades (402) are of an airfoil structure, and the rotating blades cause a pressure difference to exist on two sides of the rotating blades (402) of the airfoil structure when rotating.

5. The sewage green treatment device according to claim 2, wherein the rotating shaft (401) is provided with a rotating impeller (406) and is positioned at the revolution center of a plurality of rotating blades (402).

6. The sewage green treatment device according to any one of claims 1 to 5, wherein a plurality of first gradually-enlarging holes (201) are uniformly distributed on the static hole sleeve (2) and used for gradually enlarging media from a steady flow space into the rotary cavitation generating device (4).

7. The sewage green treatment device according to claim 6, wherein the number of the first gradually-enlarging holes (201) on the same circumference is more than or equal to 3, and the number of the rows of the first gradually-enlarging holes (201) in the axial direction is more than or equal to 2.