Wastewater electrolysis cavitation device and wastewater treatment equipment

Abstract

The utility model belongs to the technical field of wastewater treatment, and discloses a wastewater electrolysis cavitation device and wastewater treatment equipment, the wastewater electrolysis cavitation device comprises an electrochemical box, a plurality of electrode plates, a circulating water pump and a cavitator, the electrochemical box is provided with a water inlet and a water outlet, the electrode plates are arranged in the electrochemical box, the electrode plates are arranged in parallel, and the cavitator is arranged in the circulating water pump. A plurality of through holes are formed in the electrode plate; the water inlet end of the circulating water pump communicates with the interior of the electrochemical box through a water inlet pipe, the water outlet end of the circulating water pump communicates with the interior of the electrochemical box through a water outlet pipe, and the electrode plate is located between the water inlet end of the water inlet pipe and the water outlet end of the water outlet pipe; the cavitator is connected to the electrochemical box, and the cavitator can enable waste water in the electrochemical box to be cavitated. According to the wastewater electrolysis cavitation device disclosed by the utility model, wastewater circulates in the electrochemical box with the plurality of electrode plates through the circulating water pump, so that the electrochemical reaction of the wastewater is more sufficient, the cavitation effect of the wastewater in the electrochemical box is improved by the cavitator, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater electrolytic cavitation device and wastewater treatment equipment. Background Art

[0002] Wastewater electrolysis treatment refers to a method of applying the mechanism of electrolysis to convert harmful substances in the original wastewater into harmless substances through oxidation and reduction reactions at the positive and negative electrodes respectively through the electrolysis process to achieve wastewater purification. The principle is to decompose water molecules into hydrogen and oxygen through electrodes. These gases form bubbles in the liquid, and the bubbles will then grow rapidly and collapse due to pressure changes. This process is called cavitation. The collapse of cavitation bubbles will generate extremely high temperatures and pressures to decompose inorganic substances in the water. At the same time, the collapse of cavitation bubbles will also generate strong shear forces and turbulence, which can destroy the structure of inorganic substances and improve the efficiency of chemical reactions.

[0003] In addition, pollutants in wastewater will condense under the action of the electric field, eventually forming larger flocculants, which have strong adsorption and sedimentation capabilities for organic matter, heavy metals and other pollutants in wastewater. Therefore, wastewater treated by electrolysis can significantly reduce COD (Chemical Oxygen Demand), and has a good effect on the removal of ammonia nitrogen.

[0004] Most of the current electrolytic treatment equipment purifies wastewater by arranging positive and negative electrodes inside the container to generate an electric field. However, since the water inside the container is in a static state, the contact area between the water and the electric field is small, resulting in a small area for the electrochemical reaction of the water and insufficient reaction, which affects the efficiency of wastewater treatment. Utility Model Content

[0005] The utility model aims to provide a wastewater electrolytic cavitation device and wastewater treatment equipment to improve the electrochemical efficiency of wastewater.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A wastewater electrolytic cavitation device comprises an electrochemical box and an electrode plate, wherein the electrochemical box is provided with a water inlet and a water outlet, the electrode plate is placed inside the electrochemical box, a plurality of the electrode plates are arranged in parallel, and a plurality of through holes are provided on the electrode plates;

[0008] The wastewater electrolytic cavitation device also includes:

[0009] A circulating water pump, wherein the water inlet of the circulating water pump is connected to the interior of the electrification box through a water inlet pipe, the water outlet of the circulating water pump is connected to the interior of the electrification box through a water outlet pipe, and the electrode plate is located between the water inlet of the water inlet pipe and the water outlet of the water outlet pipe; and

[0010] A cavitator is connected to the electrification box, and the cavitator can cause cavitation in the wastewater inside the electrification box.

[0011] Preferably, the internal waste water of the electrification box flows along the water outlet end of the water outlet pipe to the water inlet end of the water inlet pipe, and the flow direction of the internal waste water of the electrification box is perpendicular to the electrode plate.

[0012] Preferably, the electrification box is arranged vertically, and a sewage outlet is arranged on the top of the electrification box.

[0013] Preferably, the wastewater electrolytic cavitation device further comprises:

[0014] A sewage collection mechanism is arranged on the top of the electrification box and is connected to the sewage outlet. The sewage collection mechanism can collect substances flowing out from the top of the electrification box and prevent the substances flowing out of the electrification box from flowing back to the electrification box.

[0015] Preferably, the sewage collection mechanism comprises:

[0016] an overflow ring, the overflow ring enclosing the sewage outlet; and

[0017] A collecting ring is sleeved on the outside of the overflow ring, and a seal is provided between the bottom of the collecting ring and the bottom of the overflow ring to form a collecting chamber between the collecting ring and the overflow ring; the collecting chamber can collect substances flowing out of the overflow ring, and a drain pipe is provided at the bottom of the collecting ring, and the drain pipe is connected to the collecting chamber.

[0018] Preferably, the bottom of the overflow ring is inclined toward the direction approaching the collecting chamber, and the bottom of the collecting ring is inclined toward the direction approaching the collecting chamber.

[0019] Preferably, the sewage collection mechanism further comprises:

[0020] A sealing plate is arranged on the top of the collecting ring and covers the opening of the collecting ring.

[0021] Preferably, the cavitator is arranged on the water outlet pipe.

[0022] Preferably, the cavitator is an ultrasonic cavitator.

[0023] Wastewater treatment equipment, comprising a wastewater electrolytic cavitation device.

[0024] Beneficial effects of the utility model:

[0025] The wastewater electrolytic cavitation device of the utility model pumps the wastewater in the electrochemical box through a circulating water pump, so that the wastewater circulates in the electrochemical box with multiple electrode plates, and through holes are opened on the electrode plates to increase the contact area between the wastewater and the electric field, thereby increasing the area of ​​the electrochemical reaction, making the electrochemical reaction more sufficient, and the wastewater passes through the electric field when passing through the through holes, thereby increasing the intensity of the electrochemical reaction, and finally improving the efficiency of treating the wastewater; in addition, the cavitator further improves the cavitation effect of the wastewater, so that the cavitation bubble collapses to generate high-speed microjets and shock waves to continuously clean and activate the surface of the electrode plate, remove the inactive oxide covering layer on the surface of the electrode plate, and improve the working efficiency of the electrode plate; at the same time, the local high temperature and high pressure formed at the moment of cavitation bubble collapse can thermally decompose part of the organic matter, further improving the effect of wastewater treatment.

[0026] The wastewater treatment equipment of the utility model can improve the efficiency of wastewater treatment by arranging a high-efficiency wastewater electrolytic cavitation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the wastewater electrolytic cavitation device of the utility model;

[0028] Figure 2 It is a cross-sectional view of the electrification box of the utility model.

[0029] In the figure:

[0030] 1. Electrification box; 11. Water inlet; 12. Water outlet; 13. Sewage outlet; 2. Electrode plate; 3. Circulating water pump; 31. Water inlet pipe; 32. Water outlet pipe; 4. Cavitation device; 5. Sewage collection mechanism; 51. Overflow ring; 52. Collection ring; 53. Sealing plate; 54. Collection chamber; 55. Sewage pipe; 56. Connecting ring. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Refer to the following Figure 1 to Figure 2 The wastewater electrolytic cavitation device and wastewater treatment equipment provided by the utility model are described.

[0036] The wastewater treatment equipment includes a wastewater electrolytic cavitation device. The existing wastewater electrolytic cavitation device mainly includes a container and an electrode. The electrode is energized to generate an electric field to perform electrolytic cavitation treatment on the wastewater. However, since the water body inside the container is in a static state, the contact area between the water body and the electric field is small, resulting in a small area for the electrochemical reaction and insufficient reaction, which affects the efficiency of treating the wastewater. In order to solve the above problems, this embodiment also provides a wastewater electrolytic cavitation device. The exemplary structure of the wastewater electrolytic cavitation device is referred to as follows.

[0037] Reference Figure 1 and Figure 2The wastewater electrolytic cavitation device includes an electrification box 1, an electrode plate 2, a circulating water pump 3 and a cavitator 4. The electrification box 1 is provided with a water inlet 11 and a water outlet 12. The electrode plate 2 is arranged inside the electrification box 1, and the circulating water pump 3 is placed outside the electrification box 1, and the water inlet end and the water outlet end of the circulating water pump 3 are both connected to the inside of the electrification box 1.

[0038] Specifically, the electrification box 1 is a vertically arranged rectangular parallelepiped, and the water inlet 11 and the water outlet 12 are both located at the bottom of the electrification box 1. Wastewater enters the electrification box 1 through the water inlet 11 for treatment. A sewage outlet 13 is arranged at the top of the electrification box 1, and a sewage collection mechanism 5 is arranged at the sewage outlet 13, and the substances overflowing from the top of the electrification box 1 are collected by the sewage collection mechanism 5. It should be noted that in other embodiments, the electrification box 1 can also be tilted or even horizontally arranged to ensure that the wastewater inside the electrification box 1 does not overflow. This embodiment is only described by taking the vertical arrangement as an example.

[0039] Furthermore, multiple electrode plates 2 are arranged in parallel along the length direction of the electrification box 1. In this embodiment, a single electrode plate 2 is arranged horizontally, and multiple electrode plates 2 are distributed in the vertical direction. Each electrode plate 2 is provided with a plurality of through holes, and the positions of the through holes on two adjacent electrode plates 2 do not correspond, that is, in two adjacent electrode plates 2, the position where the through hole on the upper electrode plate 2 is not provided corresponds to the position where the through hole on the next electrode plate 2 is not provided. In other embodiments, the electrode plate 2 may also be arranged tilted, which will not be described here.

[0040] Furthermore, the water inlet end of the circulating water pump 3 is connected to the inside of the electrification box 1 through the water inlet pipe 31, and the water outlet end of the circulating water pump 3 is connected to the inside of the electrification box 1 through the water outlet pipe 32. The water inlet end of the water inlet pipe 31 is close to the top of the electrification box 1, and the water outlet end of the water outlet pipe 32 is close to the bottom of the electrification box 1, or, the water inlet end of the water inlet pipe 31 is close to the bottom of the electrification box 1, and the water outlet end of the water outlet pipe 32 is close to the top of the electrification box 1. In this embodiment, the water inlet end of the water inlet pipe 31 is close to the top of the electrification box 1, and the water outlet end of the water outlet pipe 32 is close to the bottom of the electrification box 1. The electrode plate 2 is located between the water inlet end of the water inlet pipe 31 and the water outlet end of the water outlet pipe 32.

[0041] In addition, a liquid level sensor (not shown in the figure) is built into the electrification box 1, a water inlet solenoid valve (not shown in the figure) is arranged at the water inlet 11, a water outlet solenoid valve (not shown in the figure) is arranged at the water outlet 12, and a controller (not shown in the figure) is arranged outside the electrification box 1, and the liquid level sensor, water inlet solenoid valve, water outlet solenoid valve, electrode plate 2 and circulating water pump 3 are all electrically connected to the controller.

[0042] Based on the above, before treating the wastewater, the controller controls the water inlet solenoid valve to open and the water outlet solenoid valve to close, and water enters the electrification box 1. The liquid level inside the electrification box 1 is detected by the liquid level sensor. When the liquid level inside the electrification box 1 reaches the preset liquid level, the controller controls the water inlet solenoid valve to close, and the electrification box 1 stops taking water. Then the circulating water pump 3 and the electrode plate 2 work. After working for a preset time, the circulating water pump 3 and the electrode plate 2 stop working. The controller controls the water inlet solenoid valve to close and the water outlet solenoid valve to open, so that the treated wastewater is discharged from the electrification box 1. A temperature sensor is also built into the electrification box 1, and a cold air blower is also provided outside the electrification box 1. The temperature sensor and the cold air blower are electrically connected to the controller. The controller controls the start and stop of the cold air blower according to the temperature measured by the temperature sensor, so that the temperature inside the electrification box 1 is kept within a certain range.

[0043] When the circulating water pump 3 is working, water is discharged from the top of the electrification box 1 and water is inletted from the bottom of the electrification box 1. The wastewater circulates inside the electrification box 1 and flows upward in the vertical direction, that is, the flow direction of the wastewater inside the electrification box 1 is perpendicular to the electrode plate 2. The electrode plate 2 is powered by an external power supply and can electrochemically treat the wastewater contacting the electrode plate 2. Since the through holes are provided on the electrode plate 2 and the wastewater is in a circulating state, the contact area between the wastewater and the electric field is greatly increased, thereby increasing the area of ​​the electrochemical reaction, making the electrochemical reaction more sufficient, and the wastewater passes through the electric field when passing through the through holes, thereby increasing the intensity of the electrochemical reaction, and finally improving the efficiency of treating wastewater.

[0044] Optionally, the cavitator 4 can be any type of cavitation reactor in the prior art, such as a hydraulic cavitator, a vibration cavitator, etc. This embodiment is described by taking an ultrasonic cavitator in a vibration cavitator as an example. The ultrasonic cavitator in this embodiment is installed on the water outlet pipe 32. The ultrasonic cavitator can emit medium and low frequency ultrasonic waves in the kilohertz level, causing the water body to oscillate greatly. The wastewater produces pressure pulsation with the vibration of the ultrasonic cavitator. When the low pressure of the pulsating pressure in the wastewater is lower than the vaporization pressure, cavitation will occur.

[0045] The cavitation device 4 accelerates the cavitation of the wastewater inside the electrification box 1 and improves the cavitation effect. The collapse of the cavitation bubble generates high-speed micro-jets and shock waves to continuously clean and activate the surface of the electrode plate 2, remove the inactive oxide coating on the surface of the electrode plate 2, and improve the working efficiency of the electrode plate 2. In addition, the local high temperature and high pressure formed at the moment of cavitation bubble collapse can pyrolyze some organic matter, further improving the effect of wastewater treatment.

[0046] Reference Figure 2The sewage collection mechanism 5 includes an overflow ring 51, a collection ring 52 and a sealing plate 53. The overflow ring 51 is arranged in an annular shape and encloses the sewage outlet 13. The overflow ring 51 is connected to the top of the electrification box 1. The collection ring 52 is sleeved on the outside of the overflow ring 51. The collection ring 52 is connected to the top of the electrification box 1. The sealing plate 53 is connected to the top of the collection ring 52 and seals the opening at the top of the collection ring 52. The bottom of the collection ring 52 and the bottom of the overflow ring 51 are sealed to form a collection chamber 54 between the collection ring 52 and the overflow ring 51. The collection chamber 54 can collect substances flowing out of the overflow ring 51, which are flocculants generated after the electrolytic cavitation of the wastewater, as well as the wastewater and bubbles carried. The bottom of the collection ring 52 is connected to a sewage pipe 55, and the sewage pipe 55 is connected to the collection chamber 54.

[0047] Optionally, the bottom of the collecting ring 52 and the bottom of the overflow ring 51 may be cross-set to achieve a seal between the bottom of the collecting ring 52 and the bottom of the overflow ring 51; a connecting ring 56 may also be set between the bottom of the collecting ring 52 and the bottom of the overflow ring 51 to achieve sealing between the bottom of the collecting ring 52 and the bottom of the overflow ring 51. This embodiment takes the method of setting the connecting ring 56 as an example.

[0048] Based on the above, when the wastewater inside the electrification box 1 is electrochemically treated, floating floccules are generated on the surface of the wastewater. The floccules are pushed upward violently by the bubbles inside the electrification box 1, so that the floccules carry the wastewater and bubbles and overflow from the electrification box 1, and reach the inside of the collection chamber 54, and then are discharged from the electrification box 1 through the drain pipe 55, thereby removing the floccules and foam inside the water body to improve the cleanliness of the wastewater.

[0049] Furthermore, the bottom of the overflow ring 51 is inclined toward the direction close to the collecting chamber 54, and the bottom of the collecting ring 52 is inclined toward the direction close to the collecting chamber 54. Through the inclination of the overflow ring 51 and the collecting ring 52, the floating foam and wastewater entering the collecting chamber 54 are drained, so that the floating foam and wastewater in the collecting chamber 54 flow to the sewage pipe 55.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A wastewater electrolytic cavitation device, comprising an electrochemical box (1) and an electrode plate (2), wherein the electrochemical box (1) is provided with a water inlet (11) and a water outlet (12), and the electrode plate (2) is placed inside the electrochemical box (1), characterized in that: A plurality of the electrode plates (2) are arranged in parallel, and a plurality of through holes are provided on the electrode plates (2); The wastewater electrolytic cavitation device also includes: a circulating water pump (3), wherein the water inlet end of the circulating water pump (3) is connected to the interior of the electrification box (1) via a water inlet pipe (31), the water outlet end of the circulating water pump (3) is connected to the interior of the electrification box (1) via a water outlet pipe (32), and the electrode plate (2) is located between the water inlet end of the water inlet pipe (31) and the water outlet end of the water outlet pipe (32); and A cavitator (4), the cavitator (4) is connected to the electrification box (1), and the cavitator (4) can cause cavitation in the wastewater inside the electrification box (1).

2. The wastewater electrolytic cavitation device according to claim 1, characterized in that: The internal wastewater of the electrification box (1) flows along the outlet end of the outlet pipe (32) to the inlet end of the inlet pipe (31), and the flow direction of the internal wastewater of the electrification box (1) is perpendicular to the electrode plate (2).

3. The wastewater electrolytic cavitation device according to claim 1, characterized in that: The electrification box (1) is arranged vertically, and a sewage outlet (13) is arranged on the top of the electrification box (1).

4. The wastewater electrolytic cavitation device according to claim 3, characterized in that: The wastewater electrolytic cavitation device also includes: A sewage collection mechanism (5), the sewage collection mechanism (5) being arranged at the top of the electrification box (1) and being connected to the sewage outlet (13), the sewage collection mechanism (5) being capable of collecting substances flowing out of the top of the electrification box (1) and preventing substances flowing out of the electrification box (1) from flowing back into the electrification box (1).

5. The wastewater electrolytic cavitation device according to claim 4, characterized in that: The sewage collection mechanism (5) comprises: an overflow ring (51), the overflow ring (51) enclosing the sewage outlet (13); and A collecting ring (52), wherein the collecting ring (52) is sleeved on the outside of the overflow ring (51), and a sealing arrangement is provided between the bottom of the collecting ring (52) and the bottom of the overflow ring (51), so that a collecting chamber (54) is formed between the collecting ring (52) and the overflow ring (51); the collecting chamber (54) is capable of collecting substances flowing out of the overflow ring (51), and a sewage pipe (55) is provided at the bottom of the collecting ring (52), and the sewage pipe (55) is communicated with the collecting chamber (54).

6. The wastewater electrolytic cavitation device according to claim 5, characterized in that: The bottom of the overflow ring (51) is inclined in a direction close to the collecting chamber (54), and the bottom of the collecting ring (52) is inclined in a direction close to the collecting chamber (54).

7. The wastewater electrolytic cavitation device according to claim 5, characterized in that: The sewage collection mechanism (5) further comprises: A sealing plate (53) is arranged on the top of the collecting ring (52) and covers the opening of the collecting ring (52).

8. The wastewater electrolytic cavitation device according to any one of claims 1 to 7, characterized in that: The cavitator (4) is arranged on the water outlet pipe (32).

9. The wastewater electrolytic cavitation device according to any one of claims 1 to 7, characterized in that: The cavitator (4) is an ultrasonic cavitator.

10. Wastewater treatment equipment, characterized in that, The wastewater treatment equipment comprises the wastewater electrolytic cavitation device as described in any one of claims 1-9.

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