A circulating water blowdown water treatment and reuse apparatus and method

Abstract

This invention discloses a device and method for treating and reusing circulating water wastewater, specifically relating to the field of wastewater treatment technology. The device includes a treatment cylinder with connecting pipes on both the upper left and right sides. It also includes: a filter assembly disposed on the upper part of the two connecting pipes and communicating with them; an aeration assembly disposed on the bottom wall of the treatment cylinder; and a collection assembly disposed on the top of the treatment cylinder. This invention employs a multi-point distributed annular aeration structure. High-pressure air, through an air outlet mechanism, generates uniform annular bubbles covering the entire cross-section of the treatment cylinder, eliminating aeration dead zones and ensuring more thorough air-water mixing. This significantly improves aeration and oxygenation efficiency, accelerates the oxidation and decomposition of pollutants, and efficiently drives flocculated impurities to the surface through axial bubble circulation. Combined with the top automated collection assembly, it achieves fully automated collection and discharge of scum, improving the purification effect and reuse stability of the circulating water wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a device and method for treating and reusing circulating water wastewater. Background Technology

[0002] Circulating water systems are widely used in industrial production, municipal water supply, and cooling systems. During long-term operation, the continuous concentration of water leads to the continuous accumulation of impurities such as suspended solids, oil, inorganic salts, and microbial metabolic products. It is necessary to periodically discharge some circulating water and replenish it with fresh water to maintain stable system operation.

[0003] Wastewater from circulating water systems is characterized by large volume, complex types of impurities, and large fluctuations in suspended solids and pollutant content. Direct discharge of such wastewater not only causes serious waste of water resources but also pollutes the surrounding environment. Therefore, purifying and reusing wastewater from circulating water systems is an important direction for water conservation, emission reduction, and environmentally friendly production.

[0004] Currently, most existing circulating water wastewater treatment and reuse technologies employ a combination of filtration, flocculation, sedimentation, and aeration processes. However, in practical applications, the pretreatment filtration stage often uses fixed filter screens or filter media. Large particles in the wastewater easily adhere to and clog the filter surface, requiring frequent shutdowns for disassembly and cleaning. This is not only cumbersome and costly in terms of labor, but also interrupts the treatment process, failing to meet the requirements for continuous operation. Secondly, conventional aeration devices are mostly single-point direct blowing or simple air dispersion, resulting in uneven bubble distribution, the formation of aeration dead zones, and insufficient air-water mixing. This leads to low oxygenation efficiency and weak ability to carry flocculated impurities in the water, resulting in incomplete pollutant separation and difficulty in consistently meeting water quality standards. Summary of the Invention

[0005] The main objective of this invention is to provide a device and method for treating and reusing circulating water wastewater, which can effectively solve the problems mentioned above.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A circulating water wastewater treatment and reuse device includes a treatment cylinder, with connecting pipes on both the left and right sides of the upper part of the treatment cylinder, and a feeding port on the front side of the upper part of the treatment cylinder, and further includes: A filter assembly is provided on the upper part of two connecting pipes and is connected to the connecting pipes for filtering sewage. The upper part of the filter assembly is provided with a water inlet pipe, which is connected to the left, middle and right parts of the filter assembly. An aeration component is installed on the bottom wall of the treatment cylinder and is used to aerate the water after it has been filtered by the filter component. A collection component, located at the top of the treatment cylinder, is used to collect the impurities aerated and discharge them outside the treatment cylinder.

[0007] Preferably, the lower left part of the treatment cylinder is provided with a water outlet pipe, and the upper part of the outer surface of the treatment cylinder is provided with five slag outlets corresponding to the collection components in a ring shape. The upper part of the outer surface of the treatment cylinder is provided with five collection cylinders corresponding to the slag outlets in a ring shape, which are used to collect the impurities discharged by the collection components.

[0008] Preferably, the filtering component includes: The outer casing is disposed on the upper part of the two connecting pipes and communicates with the two connecting pipes; The motor is located on the right side of the housing. The output end of the motor passes through the inside of the housing and is fixedly mounted with a drive rod via a coupling. Three scrapers are arranged in a ring on the outer surface of the drive rod. A support plate is disposed at the bottom of the inner cavity of the outer shell, and a filter screen for filtering sewage is provided on the inner surface of the support plate; A rectangular hole is provided on the lower rear side of the outer surface of the outer shell, and a sealing box is provided on the rear side of the outer surface of the outer shell to seal the rectangular hole. A collection box is threadedly installed on the lower part of the sealing box.

[0009] Preferably, a portion of each of the three scrapers located away from the drive rod axis is in contact with the filter screen surface to clean the impurities filtered out by the filter screen, and the centrifugal force generated by rotation throws the impurities through the rectangular holes into the collection box.

[0010] Preferably, the aeration assembly includes: A five-point pipe is provided at the lower part of the processing cylinder, and an air pipe is provided at the air inlet of the five-point pipe; A one-way valve, wherein the one-way valve is located at the tail end of the trachea; Five air outlet mechanisms are installed inside the processing cylinder and connected to the five air outlets of the five-point pipe. The air outlet mechanism includes an installation pipe, which is located at the bottom of the processing cylinder and connected to a five-point pipe. An air outlet hood is provided on the upper part of the installation pipe. Several circular holes are opened in the bottom ring of the air outlet hood. A circular shell is provided on the bottom wall of the air outlet hood. A telescopic rod is slidably provided in the inner cavity of the circular shell. A sealing ball is provided on the upper part of the telescopic rod.

[0011] Preferably, the upper inner diameter of the vent hood is larger than the lower inner diameter, the diameter of the sealing ball is the same as the lower inner diameter of the vent hood, and the plurality of circular holes are located outside the circular shell.

[0012] Preferably, the collection component includes: An electric telescopic cylinder is located at the center of the top of the processing cylinder, and the output end of the electric telescopic cylinder extends into the processing cylinder and is provided with a circular disc. Five slag collection plates are arranged in a ring at the top of the inner surface of the processing cylinder. Each of the five slag collection plates has two guide rods in its inner cavity. The outer surfaces of the two guide rods located at one point are provided with scrapers for cleaning the slag collection plates. The five slag collection plates are distributed between two adjacent air outlets, and the five slag collection plates correspond to the five slag outlets respectively; The five scrapers are all in contact with each other, with a portion of each scraper touching the upper part of the circular disk.

[0013] A method for treating and reusing circulating water wastewater includes the following steps: S1. Pre-filtration and water inlet: The wastewater to be treated is sent to the filter assembly through the inlet pipe to complete the pre-filtration, which intercepts large particulate impurities in the water. The pre-filtered wastewater flows into the treatment cylinder through the connecting pipe, and water treatment agents are added into the treatment cylinder at the same time. S2. Aeration and impurity separation: High-pressure air is injected into the water body of the treatment cylinder through the aeration component to form annular bubbles, which completes aeration and oxygenation to promote the decomposition of pollutants. At the same time, it drives the flocculated impurities to float to the water surface to form a scum layer. S3. Automated collection of scum: The collection component is activated, and the scum is supported by the scum collection plate to complete solid-liquid separation. Then, the scum is discharged into the collection cylinder through the scum outlet by the scraper to complete centralized collection. At the same time, the filter screen is self-cleaned online by the scraper of the filter component. S4. Purified water reuse: The treated clean water is discharged into the reuse network through the outlet pipe of the treatment tank, realizing the purification and recycling of the circulating water and wastewater.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes a motor-driven scraper integrated with the filter screen within the filter assembly, enabling real-time online self-cleaning of the filter screen during wastewater pre-filtration. The scraper continuously adheres to the filter screen surface to remove large particles of impurities, and the centrifugal force of rotation automatically discharges the impurities into the collection box. This eliminates the need to stop the machine to disassemble and clean the filter screen, effectively ensuring continuous operation of the device, reducing maintenance costs, and improving the efficiency of circulating water wastewater treatment.

[0015] 2. This invention adopts a multi-point distributed annular aeration structure. High-pressure air can generate uniform annular bubbles covering the entire cross-section of the treatment cylinder through the air outlet mechanism, eliminating aeration dead zones and ensuring more thorough air-water mixing. This not only significantly improves aeration and oxygenation efficiency and accelerates the oxidation and decomposition of pollutants, but also efficiently drives flocculated impurities to float to the surface through the axial circulation of the bubbles. Combined with the top automated collection component, it achieves fully automated collection and discharge of scum, improving the purification effect and reuse stability of the circulating water wastewater. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the filter assembly structure of the present invention; Figure 5 This is a schematic diagram of the filtering component of the present invention from another perspective; Figure 6 This is a schematic diagram of the aeration component structure of the present invention; Figure 7 This is a schematic diagram of the air outlet mechanism of the present invention; Figure 8 This is a schematic diagram of the collection component structure of the present invention.

[0017] In the diagram: 1. Processing cylinder; 2. Support frame; 3. Aeration assembly; 4. Collection cylinder; 5. Slag outlet; 6. Connecting pipe; 7. Filter assembly; 8. Water inlet pipe; 9. Collection assembly; 10. Water outlet pipe; 11. Feeding port; 71. Outer shell; 72. Motor; 73. Drive rod; 74. Scraper; 75. Support plate; 76. Filter screen; 77. Collection box; 78. Sealing box; 31. Air pipe; 32. One-way valve; 33. Air outlet hood; 34. Sealing ball; 35. Circular shell; 36. 5-point pipe; 37. Telescopic rod; 38. Circular hole; 39. Installation pipe; 91. Electric telescopic cylinder; 92. Circular disc; 93. Slag collection plate; 94. Guide rod; 95. Scraper block. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] Example 1, as Figure 1 , Figure 2 and Figure 3 As shown, a circulating water wastewater treatment and reuse device and method includes a treatment cylinder 1, a support 2 fixedly installed at the bottom of the treatment cylinder 1, connecting pipes 6 fixedly installed on both the left and right sides of the upper part of the treatment cylinder 1, and a feeding port 11 provided on the front side of the upper part of the treatment cylinder 1. Flocculants, bactericides, and other water treatment agents can be added into the treatment cylinder 1 through the feeding port 11 to achieve flocculation separation and sterilization purification of impurities in the wastewater in conjunction with aeration treatment. The device also includes: The filter assembly 7 is fixedly installed on the upper part of the two connecting pipes 6 and communicates with the inside of the connecting pipes 6. It is used to pre-filter the circulating water and sewage to be treated, and remove large particulate suspended solids and impurities in the water. The filter assembly 7 is provided with an inlet pipe 8 on the upper part, which is connected to the left, middle and right parts of the filter assembly 7 to ensure that the sewage to be treated can enter the filter assembly 7 evenly. Aeration component 3 is fixedly installed on the inner bottom wall of treatment cylinder 1. It is used to aerate the sewage that has been pre-filtered by filter component 7. By filling the water with air, stable annular bubbles are formed in the water body, which realizes full mixing of air and water in the whole section, promotes the oxidation and decomposition of pollutants in the water, and at the same time drives the flocculated impurities to float to the water surface efficiently. Collection component 9 is fixedly installed on the top of treatment cylinder 1 and is used to automatically collect impurities and scum that float to the water surface after aeration and discharge them to the outside of treatment cylinder 1.

[0020] Specifically, before implementing this device, the staff first connects the water supply pipe of the circulating water to be treated to the inlet pipe 8, connects the outlet pipe 10 to the reuse network, and connects the air inlet of the aeration component 3 to the external aeration blower to complete the pipeline connection of the device; then, the appropriate amount of water treatment agent can be added into the treatment cylinder 1 through the feeding port 11 to complete the preparatory work before treatment.

[0021] Next, the staff opened the sewage delivery valve, and the circulating water to be treated was evenly fed into the filter assembly 7 through the inlet pipe 8. The filter assembly 7 completed the pre-filtration treatment, removing large particulate suspended solids, mechanical impurities and other impurities from the sewage, so as to prevent large particulate impurities from entering the treatment cylinder 1 and causing pipeline blockage and affecting the subsequent aeration treatment effect. The pre-filtered sewage flowed into the inner cavity of the treatment cylinder 1 simultaneously through two connecting pipes 6, completing the sewage pre-treatment and water intake process.

[0022] In the above process, as the wastewater enters the treatment cylinder 1, the staff starts the external aeration blower, which allows air to be evenly injected into the water in the treatment cylinder 1 through the aeration component 3. This generates continuous and stable annular bubbles in the water, achieving full contact and mixing of air and water across the entire cross-section. The large specific surface area of ​​the annular bubbles enables efficient aeration and oxygenation, promoting the oxidation and decomposition of organic pollutants and reducing substances in the water. At the same time, the rising annular bubbles form a stable axial circulation, which drives the flocs, oil, suspended solids and other impurities formed by flocculation in the water to rise quickly and evenly to the surface of the water, forming a scum layer. This completes the aeration purification and impurity separation process of the wastewater.

[0023] After aeration is completed and impurities in the water have fully floated to the surface, the staff starts the collection component 9 to collect all the scum and impurities on the surface of the water. The scum is then automatically discharged into the corresponding collection cylinder 4 through the scum outlet 5, completing the automated separation and collection of scum. The purified water is then stored in the lower part of the treatment cylinder 1 and finally discharged into the reuse network through the water outlet pipe 10, realizing the purification and reuse of the circulating water wastewater.

[0024] During continuous operation of the device, the filter assembly 7 can simultaneously complete the self-cleaning of the filter surface without stopping the machine for disassembly and cleaning, ensuring continuous operation of the device; When the water quality or influent load changes, the aeration volume and the amount of chemicals added can be adjusted to meet different treatment needs, effectively improving the applicability and treatment stability of the device.

[0025] Example 2, based on Example 1, further explains the filter component 7, aeration component 3, and collection component 9. See reference [link to example]. Figure 4 and Figure 5 The filter component 7 includes: The outer casing 71 is fixedly installed on the upper part of the two connecting pipes 6 and communicates with the interior of the two connecting pipes 6 to form a sealed filter chamber. Motor 72 is fixedly installed on the right side of housing 71. The output end of motor 72 extends into the interior of housing 71 and is fixedly installed with drive rod 73 via coupling. Three scrapers 74 are fixedly installed in a ring on the outer surface of drive rod 73. A support plate 75 is fixedly installed at the bottom of the inner cavity of the outer shell 71, and a filter screen 76 for filtering sewage is fixedly installed on the inner surface of the support plate 75. A rectangular hole is provided on the lower rear side of the outer surface of the outer shell 71. A sealing box 78 is fixedly installed on the rear of the outer surface of the processing cylinder 1 to seal the rectangular hole. A collection box 77 is installed on the lower part of the sealing box 78 by means of threads.

[0026] The three scrapers 74 mentioned above are all attached to the surface of the filter screen 76 at the ends away from the axis of the drive rod 73. They are used to clean the impurities filtered and trapped by the filter screen 76, and the impurities are thrown into the collection box 77 through the centrifugal force generated by the rotation.

[0027] Specifically, after the wastewater to be treated enters the inner cavity of the outer shell 71 through the inlet pipe 8, it passes through the filter screen 76 to complete the filtration. Large particles of impurities in the water are trapped on the upper surface of the filter screen 76. During the continuous operation of the device, the operator can start the motor 72 to drive the drive rod 73 to rotate, which in turn drives the three scrapers 74 to rotate synchronously. During the rotation of the scrapers 74, they continuously scrape against the surface of the filter screen 76 to completely remove the impurities trapped on the surface of the filter screen 76, thus preventing the accumulation of impurities and clogging of the filter screen 76. When the scraper 74 rotates, it generates centrifugal force, which pushes the scraped impurities toward the inner wall of the outer shell 71. Finally, the impurities enter the sealing box 78 through the rectangular hole and fall naturally into the collection box 77 for centralized collection.

[0028] In the above, the collection box 77 and the sealing box 78 are connected by threads. The collection box 77 is made of transparent material. When the impurities in the collection box 77 accumulate to a certain amount, the staff can directly rotate and disassemble the collection box 77 to clean the impurities. After cleaning, it can be quickly reinstalled without stopping the machine to disassemble the filter component 7.

[0029] As mentioned above, the aeration component 3 in this solution can generate stable annular bubbles in the water, achieving uniform aeration and oxygenation across the entire cross-section, while also having an anti-backflow and anti-clogging function. The specific composition and implementation process of the aeration component 3 are as follows (see below). Figure 6 and Figure 7 : A five-point pipe 36 is fixedly installed at the lower part of the processing cylinder 1, and an air pipe 31 is fixedly installed at the air inlet of the five-point pipe 36. One-way valve 32 is fixedly installed at the end of air pipe 31 to prevent sewage in treatment cylinder 1 from flowing back into aeration blower pipeline and avoid equipment damage. Five air outlet mechanisms are fixedly installed inside the processing cylinder 1 and are connected one by one to the five air outlets of the five-point pipe 36. The air outlet mechanism includes an installation pipe 39, which is fixedly installed at the bottom of the processing cylinder 1 and connected to the corresponding air outlet of the five-point pipe 36. An air outlet hood 33 is fixedly installed on the upper part of the installation pipe 39. The air outlet hood 33 is a conical cavity structure that is wider at the top and narrower at the bottom. Several circular holes 38 are circumferentially opened on the bottom of the air outlet hood 33 and the outer circumference of the annular guide platform. The opening direction of all the circular holes 38 is obliquely upward along the tangent direction of the circumference of the air outlet hood 33. A circular shell 35 is fixedly installed at the center of the inner bottom wall of the air outlet hood 33. A telescopic rod 37 is slidably installed in the inner cavity of the circular shell 35. A sealing ball 34 is fixedly installed on the upper part of the telescopic rod 37. The sealing ball 34 is located directly below the center of the annular guide platform.

[0030] The upper inner diameter of the exhaust hood 33 is larger than the lower inner diameter. The diameter of the sealing ball 34 is the same as the lower inner diameter of the exhaust hood 33 and the inner diameter of the central through hole of the annular guide platform. This can achieve double sealing of the lower air intake channel of the exhaust hood 33. Several circular holes 38 are located on the outer side of the circular shell 35 and on the outer circumference of the annular guide platform. The opening spacing of adjacent circular holes 38 is equal, ensuring that the airflow can be uniformly converged along the circumferential direction to form annular bubbles after it is ejected.

[0031] Specifically, during aeration, high-pressure air supplied by an external aeration blower enters the air pipe 31 through a one-way valve 32, and is then evenly distributed to the five installation pipes 39 through a five-point pipe 36. After the high-pressure air enters the installation pipe 39, it will be ejected from the circular hole 38. At this time, the airflow will push the sealing ball 34 upward, causing the telescopic rod 37 to slide upward along the inner cavity of the circular shell 35. The sealing ball 34 moves upward, successively releasing the blockage of the lower channel and through hole of the air outlet hood 33, allowing the airflow to flow upward through the sealing ball 34. With the design of the sealing ball 34 and the air outlet hood 33, the airflow passes between the sealing ball 34 and the air outlet hood 33, thereby generating complete and stable annular bubbles. In the above, the five air outlet mechanisms work simultaneously, which can form multiple sets of annular bubbles in the treatment cylinder 1. These bubbles can continuously diffuse radially, completely covering the entire cross-section of the water in the treatment cylinder 1, with no dead zones for aeration. In addition, the annular bubbles form a stable axial circulation during their ascent, which can efficiently carry impurities such as flocs, oil, and suspended solids formed by flocculation in the water to the surface of the water. This avoids the problems of uneven floating and weak impurity carrying capacity of traditional spherical bubbles, and improves the separation efficiency of impurities from the water.

[0032] When the aeration blower is turned off or the pipeline pressure is insufficient, the sealing ball 34, under the combined action of its own weight and the water pressure inside the treatment cylinder 1, drives the telescopic rod 37 to slide down and reset along the circular shell 35. The sealing ball 34 will block the lower air inlet channel of the air outlet hood 33, preventing sewage and impurities in the treatment cylinder 1 from flowing back into the air pipe 31 and the five-point pipe 36, thereby improving the operational stability and service life of the aeration system.

[0033] As mentioned above, the collection component 9 of this solution can achieve fully automated collection and discharge of surface scum without manual cleaning. The specific composition and implementation process of the collection component 9 are as follows (see attached document). Figure 8 : Collection component 9 includes: An electric telescopic cylinder 91 is fixedly installed at the center of the top of the processing cylinder 1. The output end of the electric telescopic cylinder 91 extends into the inner cavity of the processing cylinder 1 and is fixedly installed with a circular disc 92. Five slag collection plates 93 are rotatably mounted on the top of the inner surface of the processing cylinder 1. Two parallel guide rods 94 are fixedly installed in the inner cavity of each of the five slag collection plates 93. The outer surfaces of the two guide rods 94 located at the same location are slidably mounted with scraper blocks 95 for cleaning the surface of the slag collection plates 93. Five slag collection plates 93 are respectively distributed in the gap between two adjacent air outlet hoods 33, and the five slag collection plates 93 are respectively set one-to-one with the five slag outlets 5. The five scrapers 95 are all in contact with each other at one end, and their upper outer edges are all against the circular disk 92.

[0034] Specifically, when it is necessary to clean and collect scum on the surface of the water, the staff will start the electric telescopic cylinder 91 to extend the output end of the electric telescopic cylinder 91 downward, which will drive the circular disc 92 to move vertically downward. During the downward movement of the circular disc 92, it will drive the five scum collection plates 93 to flip downward along the rotating connection, so that the five scum collection plates 93 are simultaneously immersed below the water surface. At this time, the scum and impurities that float to the surface by the annular air bubble will be carried by the water flow to the upper surface of the scum collection plate 93.

[0035] After the scum has fully gathered on the surface of the scum collection plate 93, the output end of the electric telescopic cylinder 91 is controlled to retract upward, driving the circular disc 92 to move vertically upward. During the upward movement of the circular disc 92, the five scum collection plates 93 are driven to flip upward and reset simultaneously, so that the scum collection plates 93 return to the horizontal state, and all the scum and impurities on the water surface are supported on the upper surface of the scum collection plate 93, so as to achieve complete separation of scum from water. Subsequently, the output end of the electric telescopic cylinder 91 continues to retract upward, driving the circular disk 92 to move upward. During the upward movement of the circular disk 92, it will become tilted upward. At this time, under the influence of its own gravity, the five scraper blocks 95 will slide along the guide rod 94 towards the inner wall of the processing cylinder 1. During the sliding process of the scraper blocks 95, they will scrape the floating scum and impurities supported on the upper surface of the scum collection plate 93 towards the scum outlet 5. Finally, the floating scum is discharged through the scum outlet 5 into the collection cylinder 4 outside the processing cylinder 1, completing the automatic collection and discharge of floating scum. After the scum is cleaned, the electric telescopic cylinder 91 drives the circular disc 92 to reset, and the scraper 95 returns to its initial position in sync, waiting for the next scum cleaning operation.

[0036] As described above, the guide rod 94 provides stable guidance for the sliding of the scraper block 95, ensuring that the scraper block 95 slides without deviation or jamming, and ensuring that the scum on the surface of the scum collection plate 93 is thoroughly cleaned without residue. The scum collection plate 93 adopts a ring-shaped uniform distribution design, which can realize the full coverage collection of scum on the water surface of the entire cross section of the treatment cylinder 1, without cleaning dead corners, and improve the scum separation efficiency.

[0037] A method for treating and reusing circulating water wastewater includes the following steps: S1. Pre-filtration inlet: The wastewater to be treated circulating water is sent into the filter assembly through the inlet pipe. The filter screen intercepts large suspended solids and mechanical impurities in the wastewater to complete the pre-filtration. The pre-filtered wastewater flows into the inner cavity of the treatment cylinder through the connecting pipe. At the same time, the appropriate water treatment agent is added into the treatment cylinder through the feeding port. S2, Aeration Purification and Separation: High-pressure air is injected into the water in the treatment cylinder through the aeration component, generating continuous and stable annular bubbles in the water to complete full-section aeration and oxygenation, promoting the oxidation and decomposition of organic pollutants in the water. At the same time, the rising bubbles carry the impurities formed by flocculation in the water to the surface to form a scum layer. S3. Scum collection and discharge: Start the collection component, and the scum on the water surface is supported by the scum collection plate to achieve complete separation of the scum from the water body. Then, the scum on the scum collection plate is discharged into the collection cylinder through the scum outlet by the scraper to complete the centralized collection. S4. Online self-cleaning: During continuous operation of the device, the motor of the filter assembly drives the scraper to rotate and scrape against the surface of the filter screen, sending the impurities trapped by the filter screen into the collection box through centrifugal force, and simultaneously completing the online self-cleaning of the filter surface. S5. Purified water reuse: The purified water is retained at the bottom of the treatment tank and eventually discharged into the reuse network through the outlet pipe, completing the purification and reuse of the circulating water and wastewater.

[0038] It should be noted that the specific installation methods, circuit connection methods, and control methods of the motor 72, electric telescopic cylinder 91, and external aeration blower used in this invention are all conventional designs, and will not be described in detail in this invention.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A circulating water wastewater treatment and reuse device, comprising a treatment cylinder (1), wherein connecting pipes (6) are provided on both the left and right sides of the upper part of the treatment cylinder (1), and a feeding port (11) is provided on the front side of the upper part of the treatment cylinder (1), characterized in that, Also includes: The filter assembly (7) is located on the upper part of two connecting pipes (6) and is connected to the connecting pipes (6) for filtering sewage. The filter assembly (7) is provided with an inlet pipe (8) on the upper part, which is connected to the left, middle and right parts of the filter assembly (7). Aeration component (3) is installed on the bottom wall of the treatment cylinder (1) and is used to aerate the water after it has been filtered by the filter component (7). Collection component (9) is located at the top of the treatment cylinder (1) and is used to collect the impurities aerated and discharge them to the outside of the treatment cylinder (1).

2. The circulating water wastewater treatment and reuse device according to claim 1, characterized in that: The lower left part of the treatment cylinder (1) is provided with a water outlet pipe (10). The upper part of the outer surface of the treatment cylinder (1) is provided with five slag outlets (5) corresponding to the collection components (9). The upper part of the outer surface of the treatment cylinder (1) is provided with five collection cylinders (4) corresponding to the slag outlets (5), which are used to collect the impurities discharged by the collection components (9).

3. The circulating water wastewater treatment and reuse device according to claim 1, characterized in that, The filter assembly (7) includes: The outer casing (71) is disposed on the upper part of the two connecting pipes (6) and communicates with the two connecting pipes (6); The motor (72) is located on the right side of the housing (71). The output end of the motor (72) passes through the interior of the housing (71) and is fixedly mounted with a drive rod (73) through a coupling. The outer surface of the drive rod (73) is provided with three scrapers (74) in a ring. A support plate (75) is provided at the bottom of the inner cavity of the outer shell (71), and a filter screen (76) for filtering sewage is provided on the inner surface of the support plate (75). A rectangular hole is provided on the lower rear side of the outer surface of the outer shell (71), and a sealing box (78) is provided on the rear side of the outer surface of the outer shell (71) to seal the rectangular hole. A collection box (77) is installed at the lower part of the sealing box (78) by threads.

4. The circulating water wastewater treatment and reuse device according to claim 3, characterized in that: The three scrapers (74) are all attached to the surface of the filter screen (76) at a distance from the axis of the drive rod (73) to clean the impurities filtered out by the filter screen (76) and throw the impurities into the collection box (77) through the centrifugal force generated by the rotation.

5. The circulating water wastewater treatment and reuse device according to claim 1, characterized in that, The aeration component (3) includes: Five-point pipe (36), the five-point pipe (36) is located at the lower part of the processing cylinder (1), and the air inlet of the five-point pipe (36) is provided with an air pipe (31). A one-way valve (32) is provided at the end of the air pipe (31); Five air outlet mechanisms are respectively set inside the processing cylinder (1) and connected to the five air outlets of the five-point pipe (36); The air outlet mechanism includes an installation pipe (39), which is located at the bottom of the processing cylinder (1) and connected to a five-point pipe (36). An air outlet hood (33) is provided on the upper part of the installation pipe (39). Several circular holes (38) are opened in a ring at the bottom of the air outlet hood (33). A circular shell (35) is provided on the bottom wall of the air outlet hood (33). A telescopic rod (37) is slidably provided in the inner cavity of the circular shell (35). A sealing ball (34) is provided on the upper part of the telescopic rod (37).

6. The circulating water wastewater treatment and reuse device according to claim 5, characterized in that: The upper inner diameter of the vent hood (33) is larger than the lower inner diameter, the diameter of the sealing ball (34) is the same as the lower inner diameter of the vent hood (33), and a plurality of the circular holes (38) are located outside the circular shell (35).

7. The circulating water wastewater treatment and reuse device according to claim 5, characterized in that, The collection component (9) includes: An electric telescopic cylinder (91) is provided at the top center of the processing cylinder (1). The output end of the electric telescopic cylinder (91) extends into the processing cylinder (1) and is provided with a circular disc (92). Five slag collection plates (93) are arranged in a ring at the top of the inner surface of the processing cylinder (1). Each of the five slag collection plates (93) has two guide rods (94) in its inner cavity. The outer surfaces of the two guide rods (94) located at one place are provided with scrapers (95) for cleaning the slag collection plates (93). The five slag collection plates (93) are distributed between two adjacent air hoods (33), and the five slag collection plates (93) correspond to the five slag outlets (5); The five scrapers (95) are all in contact with each other at a distance from the upper part of the circular disk (92).

8. A method for treating and reusing circulating water wastewater, characterized in that, Includes the following steps: S1. Pre-filtration and water inlet: The wastewater to be treated is sent to the filter assembly through the inlet pipe to complete the pre-filtration, which intercepts large particulate impurities in the water. The pre-filtered wastewater flows into the treatment cylinder through the connecting pipe, and water treatment agents are added into the treatment cylinder at the same time. S2. Aeration and impurity separation: High-pressure air is injected into the water body of the treatment cylinder through the aeration component to form annular bubbles, which completes aeration and oxygenation to promote the decomposition of pollutants. At the same time, it drives the flocculated impurities to float to the water surface to form a scum layer. S3. Automated collection of scum: The collection component is activated, and the scum is supported by the scum collection plate to complete solid-liquid separation. Then, the scum is discharged into the collection cylinder through the scum outlet by the scraper to complete centralized collection. At the same time, the filter screen is self-cleaned online by the scraper of the filter component. S4. Purified water reuse: The treated clean water is discharged into the reuse network through the outlet pipe of the treatment tank, realizing the purification and recycling of the circulating water and wastewater.

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