Cavitation jet sewage treatment device

Abstract

The utility model relates to the technical field of sewage treatment equipment, and discloses a cavitation jet sewage treatment device which comprises a treatment tank and a sewage pool, a liquid inlet hole is formed in the treatment tank, the sewage pool is connected with the liquid inlet hole through a sewage inlet pipe, a pressurizer is connected to the sewage inlet pipe, and a liquid storage tank is arranged on the upper portion of the inner wall of the treatment tank. A filter screen barrier is arranged at an inlet of the liquid storage tank, a liquid outlet pipe is connected to the liquid storage tank, a water inlet pipe is arranged at the lower part of the treatment tank, and a rotating mechanism is arranged on the inner bottom surface of the treatment tank. According to the utility model, organic matters and ammonia nitrogen molecular chains in sewage are effectively decomposed through cavitation jet flow, and the treated sewage can be effectively filtered.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, specifically to a cavitation jet sewage treatment device. Background Technology

[0002] Currently, waste disposal methods in large and medium-sized cities in China include landfill, composting, and incineration. During the treatment process, various metabolic substances and moisture are produced due to anaerobic fermentation, organic matter decomposition, rainwater runoff, and groundwater leaching, forming leachate. Leachate contains a large amount of toxic substances, such as heavy metal particles, ammonia nitrogen, and COD (chemical oxygen demand), which are all very high, making its treatment extremely difficult. The commonly used method is to transport the leachate to urban wastewater treatment plants, which incurs high transportation and treatment costs. Furthermore, the transportation process can cause the transfer of pollution sources, easily leading to secondary pollution.

[0003] With advancements in biotechnology and membrane treatment technology, the combined biochemical and membrane process for leachate treatment has rapidly developed and gradually become the mainstream technology for leachate treatment. Most of the recalcitrant organic pollutants in the biochemical effluent can be retained by nanofiltration units. After reverse osmosis treatment, nanofiltration effluent can almost guarantee that all pollution indicators meet discharge standards. However, due to the operating characteristics of nanofiltration / reverse osmosis membranes, the membrane process only achieves pollutant retention; a large amount of membrane concentrate is inevitably generated during membrane treatment. This concentrate has a higher concentration of recalcitrant organic matter. Existing membrane concentrate treatment technologies for this concentrate mostly suffer from high treatment costs, excessive energy consumption, and unstable treatment effects. Currently, there is no mature and reliable treatment technology applied, which is the biggest challenge in membrane separation treatment.

[0004] Currently, landfill leachate or industrial wastewater is usually treated directly in the treatment system described above. Without pretreatment, subsequent treatment becomes more difficult and inadequate, increasing costs and the space occupied by equipment.

[0005] Cavitation jet is a continuous jet in which cavitation bubbles are naturally generated. The basic principle of cavitation jet is to induce cavitation within the liquid jet, causing the cavitation bubbles to grow. When the jet containing these cavitation bubbles impacts the surface of an object, the bubbles rupture on and near the surface. Due to the highly concentrated energy released during cavitation bubble rupture, the surface of the object is rapidly destroyed. Cavitation jets can be used in wastewater treatment as a pretreatment method. For example, patent publication number CN 109824137 A describes a hydraulic cavitator for domestic wastewater treatment. Through mechanical rotation, it generates a sufficient number of cavitation bubbles. The cavitation bubbles collapse instantaneously, forming microjet streams and shock waves, generating instantaneous local high temperatures and pressures, making cavitation more intense and improving cavitation efficiency. This degrades large, difficult-to-treat molecules in the wastewater into relatively easily decomposable smaller molecules, achieving a pretreatment effect on the wastewater. However, the treated water is discharged directly from the outlet pipe below. Because there are still residues in the wastewater, there is no effective filtration, which can easily clog the outlet. Utility Model Content

[0006] The purpose of this invention is to address the above-mentioned problems by providing a cavitation jet wastewater treatment device that effectively decomposes organic matter and ammonia nitrogen molecular chains in wastewater through cavitation jets and effectively filters the treated wastewater.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A cavitation jet wastewater treatment device includes a treatment tank and a wastewater pool. The treatment tank is provided with an inlet hole, and the wastewater pool is connected to the inlet hole through a wastewater inlet pipe. A pressure booster is connected to the wastewater inlet pipe. A storage tank is provided on the upper part of the inner wall of the treatment tank. A filter screen is provided at the inlet of the storage tank. An outlet pipe is connected to the storage tank. A water inlet pipe is provided at the lower part of the treatment tank. A rotating mechanism is provided on the bottom surface of the treatment tank.

[0008] Preferably, the rotating mechanism consists of a drive motor and rotating blades mounted on the drive shaft of the drive motor.

[0009] Preferably, at least two rotating mechanisms are provided, each rotating mechanism is evenly distributed on the bottom surface of the processing tank, and the drive motor of each rotating mechanism is controlled independently.

[0010] Preferably, the wastewater tank is filled with an active biochemical agent.

[0011] Preferably, the wastewater inlet pipe is located in the central area of ​​the top of the treatment tank, and the rotating mechanism is located in the central area of ​​the bottom surface of the treatment tank.

[0012] Preferably, a first solenoid valve is provided on the sewage inlet pipe, a second solenoid valve is provided on the liquid outlet pipe, and a third solenoid valve is provided on the water inlet pipe.

[0013] Preferably, the filter screen is provided with a cleaning scraper, and the treatment tank is provided with a drive mechanism that drives the cleaning scraper to rotate along the inner wall of the treatment tank.

[0014] Preferably, the drive mechanism includes a gear ring, a gear meshing with the gear ring, and a reduction motor. The gear ring is rotatably mounted on the upper inner wall of the processing tank. The cleaning scraper is connected to the gear ring. The reduction motor is located at the top of the processing tank, and the output shaft of the reduction motor is connected to the gear.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] This invention effectively decomposes organic matter and ammonia nitrogen molecular chains in wastewater through cavitation jetting. By setting up a storage tank and filter screen, it effectively filters the treated wastewater, achieving wastewater pretreatment and reducing the difficulty of subsequent treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0018] Figure 2 A top view schematic diagram showing the three rotating mechanisms of this utility model;

[0019] Figure 3 A top view schematic diagram showing the four rotating mechanisms of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the processing tank according to another embodiment of the present invention;

[0021] In the diagram: 1-treatment tank, 2-sewage inlet pipe, 21-first solenoid valve, 3-pressurizer, 5-inlet pipe, 51-third solenoid valve, 4-sewage pool, 6-rotating mechanism, 7-outlet pipe, 71-second solenoid valve, 8-storage tank, 9-filter screen, 10-cleaning scraper, 11-drive mechanism, 111-gear ring, 112-gear, 113-reduction motor. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] Example 1

[0025] like Figure 1 As shown, a cavitation jet wastewater treatment device includes a treatment tank 1 and a wastewater pool 4. The treatment tank 1 is provided with an inlet port, and the wastewater pool 4 is connected to the inlet port through a wastewater inlet pipe 2. A pressure booster 3 is connected to the wastewater inlet pipe 2. A storage tank 8 is provided on the upper part of the inner wall of the treatment tank 1, and a filter screen 9 is provided at the inlet of the storage tank 8. An outlet pipe 7 is connected to the storage tank 8. A water inlet pipe 5 is provided at the lower part of the treatment tank 1, and a rotating mechanism 6 is provided on the bottom surface of the inner wall of the treatment tank 1. The wastewater pool 4 can be filled with an active biochemical agent to enhance the activity of microorganisms in the biochemical pool and increase the population of microorganisms, thereby improving the adaptability and decomposition capacity of wastewater.

[0026] The rotating mechanism 6 consists of a drive motor and rotating blades mounted on the drive shaft of the motor. Alternatively, it could be any similar structure, as long as high-speed rotation is achieved. The liquid flowing from the inlet has high pressure, forming a jet that flows directly downwards. The rotating mechanism 6 rotates at high speed, and the rotating blades collide and impact the jet. The jet is agitated by the rotation, forming bubbles that disperse in all directions. When these bubbles collide with the inner wall of the treatment tank 1 or other surfaces, they explode, generating immense pressure (up to 10000 Pa) and high temperature (800-1000 °C). Under this pressure and high temperature environment, enzymes are extracted from the wastewater. These enzymes, together with added biochemical activators, rapidly decompose organic matter and ammonia nitrogen molecules in the wastewater.

[0027] At least two rotating mechanisms 6 are provided, each evenly distributed on the bottom surface of the processing tank 1, and the drive motor of each rotating mechanism 6 is controlled independently. By using multiple rotating mechanisms 6 and controlling the drive motor of each rotating mechanism 6 independently, they can all rotate in the same direction (such as clockwise or counterclockwise), or a portion of them can rotate clockwise while the rest rotate counterclockwise, thus creating a better counter-current effect.

[0028] As attached Figure 2 As shown, three rotating mechanisms 6 are arranged at even intervals. The fluid entering from the sewage inlet pipe 2 forms a jet due to its high pressure and is directly shot towards the rotating mechanism 6. The rotating mechanism 6 rotates at high speed, stirring the jet. Due to the presence of multiple rotating mechanisms 6, a counter-current effect is created, and the resulting bubbles disperse around them. They collide with each other or explode after hitting the inner wall of the treatment tank 1, generating a powerful impact force instantly. This effectively decomposes organic matter and ammonia nitrogen molecular chains in the sewage, making it particularly suitable for treating sewage with high COD and ammonia nitrogen, saving on the difficulty and cost of subsequent treatment.

[0029] Or as attached Figure 3 As shown, four rotating mechanisms 6 are provided. Of course, other numbers of rotating mechanisms 6 can be provided, which will not be listed here.

[0030] The wastewater inlet pipe 2 is located in the central area of ​​the top of the treatment tank 1, and the rotating mechanism 6 is located in the central area of ​​the bottom surface of the treatment tank 1. This is more conducive to the mixing of the jet.

[0031] The sewage inlet pipe 2 is equipped with a first solenoid valve 21, the liquid outlet pipe 7 is equipped with a second solenoid valve 71, and the water inlet pipe 5 is equipped with a third solenoid valve 51.

[0032] Wastewater is sprayed vertically downwards from the top of treatment tank 1. As it is agitated by high-speed rotating blades, bubbles are generated. The bursting of these bubbles creates immense pressure (typically up to 10,000 Pa) and generates high temperatures (800-1000℃). This high-pressure, high-temperature environment effectively decomposes enzymes from the wastewater. With the catalytic action of the added active biochemical agent and the enzymes themselves, and aided by the immense energy (high pressure and temperature) generated by cavitation, enzymes are further extracted from the wastewater. The combined action of the enzymes and the added active biochemical agent effectively decomposes organic matter and ammonia nitrogen molecules in the wastewater. After being agitated at high speed by the rotating mechanism 6, the wastewater slowly settles within treatment tank 1. As the liquid accumulates, it rises to the height of the storage tank 8 and enters there. The wastewater is then discharged through the outlet pipe 7. The filter screen 9 further filters the wastewater, preventing blockage of the outlet pipe 7 and reducing the difficulty of subsequent treatment.

[0033] Example 2

[0034] Unlike Embodiment 1, the filter screen 9 is equipped with a cleaning scraper 10, and the processing tank 1 is equipped with a drive mechanism 11 that drives the cleaning scraper 10 to rotate along the inner wall of the processing tank 1. When the filter screen 9 is clogged, the filter material can be cleaned by the cleaning scraper 10, improving cleaning efficiency. The drive mechanism 11 includes a gear ring 111, a gear 112 meshing with the gear ring 111, and a reduction motor 113. The gear ring 111 is rotatably mounted on the upper inner wall of the processing tank 1. The cleaning scraper 10 is connected to the gear ring 111. The reduction motor 113 is located at the top of the processing tank 1, and the output shaft of the reduction motor 113 is connected to the gear 112. When the reduction motor 113 drives the gear 112 to rotate, the gear 112 drives the gear ring 111 to rotate, thereby driving the cleaning scraper 10 to rotate along the inner wall of the processing tank 1 to clean the filter screen 9.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A cavitation jet wastewater treatment device, comprising a treatment tank and a wastewater pool, characterized in that: The treatment tank is provided with a liquid inlet hole, and the sewage tank is connected to the liquid inlet hole through a sewage inlet pipe. A pressure booster is connected to the sewage inlet pipe. A storage tank is provided on the upper part of the inner wall of the treatment tank. A filter screen is provided at the inlet of the storage tank. An outlet pipe is connected to the storage tank. A water inlet pipe is provided at the lower part of the treatment tank. A rotating mechanism is provided on the bottom surface of the treatment tank.

2. The cavitation jet wastewater treatment device according to claim 1, characterized in that: The rotating mechanism consists of a drive motor and rotating blades mounted on the drive shaft of the drive motor.

3. The cavitation jet wastewater treatment device according to claim 2, characterized in that: At least two rotating mechanisms are provided, each evenly distributed on the bottom surface of the processing tank, and the drive motor of each rotating mechanism is controlled independently.

4. The cavitation jet wastewater treatment device according to claim 1, characterized in that: The wastewater tank is filled with active biochemical agents.

5. The cavitation jet wastewater treatment device according to claim 1, characterized in that: The wastewater inlet pipe is located in the central area of ​​the top of the treatment tank, and the rotating mechanism is located in the central area of ​​the bottom of the treatment tank.

6. The cavitation jet wastewater treatment device according to claim 1, characterized in that: The sewage inlet pipe is equipped with a first solenoid valve, the liquid outlet pipe is equipped with a second solenoid valve, and the water inlet pipe is equipped with a third solenoid valve.

7. The cavitation jet wastewater treatment device according to claim 1, characterized in that: The filter screen is equipped with a cleaning scraper, and the treatment tank is equipped with a drive mechanism that drives the cleaning scraper to rotate along the inner wall of the treatment tank.

8. A cavitation jet wastewater treatment device according to claim 7, characterized in that: The drive mechanism includes a gear ring, a gear meshing with the gear ring, and a reduction motor. The gear ring is rotatably mounted on the upper inner wall of the processing tank. The cleaning scraper is connected to the gear ring. The reduction motor is located at the top of the processing tank, and the output shaft of the reduction motor is connected to the gear.

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