Disinfection device applied to reclaimed water transmission and distribution system terminal

Abstract

The utility model relates to a disinfection device applied to a reclaimed water transmission and distribution system terminal, a water inlet pipe and a water outlet pipe are respectively connected to a water inlet and a water outlet, an arranged isolation quartz sleeve divides a cavity of a pipe body into an inner cavity and an outer cavity, and a titanium mesh is arranged in the outer cavity of the pipe body along the height direction. The TiO2 nanotube array is uniformly arranged on the surface of the titanium mesh; the hydraulic rotary cleaner is arranged at the bottom end of the titanium mesh; and a sterilizing lamp strip fixing plate, a sterilizing lamp strip and UV-LED lamp beads are arranged in a cavity on the inner side of the tube body. According to the utility model, a UV-TiO2-ClO2-ternary system is constructed, and a disinfection by-product ClO2-in reclaimed water is photocatalytically oxidized through UV excitation of the TiO2 nanotube array to generate ClO2 in situ, so that a sterilization mode of combining UV instantaneous disinfection and ClO2 continuous disinfection is realized, and the problem that pathogenic microorganisms exceed the standard due to insufficient amount of a disinfectant in a reclaimed water terminal user system is solved.

Description

Technical Field

[0001] The utility model belongs to the field of environmental protection and reclaimed water treatment, and particularly relates to a disinfection device applied to the terminal of a reclaimed water distribution system. Background Art

[0002] With the increasing shortage of water resources, water conservation has become an important issue in environmental protection; among the measures for water conservation, treating sewage (waste water) used in certain situations to meet the water quality standards and requirements for a certain use and becoming reclaimed water that can be reused again is also an important measure for water conservation. At present, the use of reclaimed water treatment has received more and more attention and can be used for irrigation, industrial water, municipal miscellaneous water, etc.

[0003] At present, municipal miscellaneous reclaimed water will face some safety problems in actual applications, which are mainly manifested in three aspects:

[0004] 1. Insufficient residual disinfectant at the end of the municipal reclaimed water distribution system: The reclaimed water may be secondarily polluted during the distribution process, and at the same time, the effectiveness of the disinfectant will decay during the transmission of the reclaimed water, resulting in the inability to effectively kill pathogenic microorganisms in the pipeline when reaching the end, thus increasing the risk of water quality pollution;

[0005] 2. Long-term retention of reclaimed water inside the end-user: When the reclaimed water enters the user system from the municipal pipe network, due to the non-continuous use of reclaimed water by users (such as building flushing, greening sprinkling, landscape water replenishment, etc.), the reclaimed water will stay inside the user system for a long time, which is likely to breed a large number of pathogenic microorganisms, thus affecting the next water use safety;

[0006] 3. Influence of disinfection by-products: Chlorine dioxide (ClO2) is a disinfectant widely used in reclaimed water treatment. During the disinfection process, the use of ClO2 will produce disinfection by-products such as chlorite (ClO2 — ). This substance will damage human health. ClO2 — not only damages the blood system, causing hemolytic anemia, but also affects the normal development of the nervous system, leading to mental retardation and decline in cognitive behavior ability. At the same time, it will interfere with the human endocrine system, slow down metabolism, and all of the above endanger human life and health safety.

[0007] To ensure that the reclaimed water meets the safety standards before use, reduce the content of pathogenic microorganisms in the water, extend the service life of the pipe network, and improve the public's confidence in using reclaimed water, there is an urgent need for a disinfection device applied to the terminal of the reclaimed water distribution system. Summary of the Invention

[0008] In view of the deficiencies of the above-mentioned existing technologies, the present utility model proposes a disinfection device applied to the terminal of a reclaimed water distribution system, aiming to ensure the water quality safety of reclaimed water in municipal miscellaneous uses.

[0009] The present utility model constructs a new UV-TiO 2 -ClO 2 — ternary system, and through ultraviolet (UV) excitation of titanium dioxide (TiO 2 ) nanotube arrays, photocatalytically oxidize the disinfection by-product ClO2 in reclaimed water — to in-situ generate ClO2, thereby realizing a sterilization mode that combines instantaneous UV disinfection with continuous ClO2 disinfection. In addition to effectively killing various pathogenic microorganisms, this system can also oxidize the residual organic pollutants in reclaimed water through a large number of reactive oxygen species (ROS) generated by photocatalysis, achieving deep purification of reclaimed water.

[0010] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0011] A disinfection device applied to the terminal of a reclaimed water distribution system, including a pipe body, with a water inlet and a water outlet provided on the pipe body. It is characterized in that an inlet pipe is connected to the water inlet to introduce external water into the cavity inside the pipe body through the inlet pipe, and an outlet pipe is connected to the water outlet to lead out the water inside the pipe body; in the cavity inside the pipe body, an isolation quartz sleeve is provided, which divides the cavity of the pipe body into two inner and outer cavities. In the outer cavity of the pipe body through which water passes, a titanium mesh is arranged along the height direction, and uniformly arranged TiO 2 nanotube arrays are in-situ generated on both the inner and outer surfaces of the titanium mesh. Compared with the traditional TiO 2 coating method, the TiO 2 nanotube arrays prepared in this way are more firmly combined with the substrate, have better mechanical stability, higher electron transfer efficiency, and better photocatalytic effect. In addition, at the bottom end of the titanium mesh, a hydraulic rotary cleaner is provided, which rotates under the impact of water flow, driving the titanium mesh to rotate to achieve self-cleaning of the photocatalyst surface; in the inner cavity of the pipe body isolation sleeve, a sterilization lamp belt fixing plate is provided, and a sterilization lamp belt is provided on the sterilization lamp belt fixing plate. A number of UV-LED lamp beads are provided on the sterilization lamp belt. The sterilization lamp belt or UV-LED lamp beads are electrically connected to a controller and are energized under the action of the controller to emit ultraviolet rays with an inducing effect and irradiate the titanium mesh with TiO 2 nanotube arrays.

[0012] Furthermore: At the upper end of the pipe body, a cover body is provided to seal and tighten the upper end of the pipe body.

[0013] Furthermore, the sterilization lamp belt fixing plate is arranged in a polygonal or ring-shaped manner. This ensures that the ultraviolet light emitted by each UV-LED lamp bead can irradiate the TiO 2 Nanotube arrays, enlarged TiO 2 Irradiation time of nanotube array and UV-LED lamp beads.

[0014] Furthermore, the plurality of sterilization lamp strip fixing plates form a regular polygonal arrangement structure.

[0015] Furthermore, the water inlet is arranged at a low position of the tube body; the water inlet pipe enters the tube body cavity from the tangent direction of the water inlet. Thus, a structure is formed in which water enters from the bottom of the tube body and water exits from the top; moreover, the external water enters the tube body cavity from the tangent direction, generating greater rotational kinetic energy, making it easier to drive the titanium mesh to rotate through the hydraulic rotary cleaner, generating a self-cleaning effect in the water.

[0016] Furthermore, a circulation return pipeline is provided between the water outlet pipe and the water inlet pipe. The rear end of the water outlet pipe is connected to the water inlet pipe through the circulation return pipeline with a circulation pump. The circulation pump on the circulation return pipeline is started to return water to the water inlet pipe through the circulation return pipeline. The utility model uses the circulation return pipeline to allow the stagnant water in the pipe body to enter the disinfection device of the utility model again for disinfection treatment; the water is disinfected again after UV-TiO 2 -ClO 2 — The treatment of the ternary system ensures the continuous stability and high standards of water quality, and then the water is discharged again, ensuring the efficient operation of the entire water treatment system and the safety of water quality.

[0017] Compared with the prior art, the utility model is a disinfection device applied to the terminal of the reclaimed water distribution system, which has the following technical features:

[0018] 1. The utility model constructs a UV-TiO 2 -ClO 2 — The ternary system. First, ultraviolet light can quickly destroy the DNA and RNA of microorganisms, making the system have instant and efficient disinfection capabilities; second, UV excites TiO 2 Nanotube array photocatalytic oxidation of disinfection byproduct ClO2 in reclaimed water — In-situ generation of ClO2 realizes a sterilization mode combining UV instantaneous disinfection with ClO2 continuous disinfection, making up for the problem of excessive pathogenic microorganisms caused by insufficient residual disinfectant in the terminal user system of recycled water. In addition to effectively killing various pathogenic microorganisms, the system can also oxidize the residual organic pollutants in the recycled water through the large amount of ROS generated by photocatalysis, thus achieving deep purification of recycled water.

[0019] 2. A rotating device is connected to the lower end of the titanium mesh of the present utility model. This device can drive the titanium mesh to rotate by utilizing the impact force of water flow. Under the continuous action of water flow, pollutants and accumulations on the surface of the titanium mesh will be effectively removed, keeping the surface of the titanium mesh clean. The present utility model utilizes the photocatalytic self-cleaning property of TiO 2 nanotube arrays. By means of photocatalytic reaction, oxidants are generated, which can decompose organic dirt attached to the mesh surface, thereby keeping the mesh surface clean, improving the photocatalytic efficiency, and reducing the maintenance cost.

[0020] 3. In the field of municipal reclaimed water, the usage patterns of reclaimed water are divided into two types: continuous use and intermittent use. In view of these different usage patterns and combining with the potential problems in terms of the safety of reclaimed water, three disinfection water supply systems applied to different scenarios are designed: 1) A continuous disinfection system, which is designed specifically for the continuous use of reclaimed water. It is aimed at the end-users of reclaimed water located at the end of the reclaimed water transmission and distribution system and is applicable to the situation where the residual amount of disinfectant in the influent is insufficient, resulting in the concentration of pathogenic microorganisms in the influent exceeding the standard; 2) An end-user stagnant water disinfection system, which is for the end-users who use reclaimed water intermittently. This system only disinfects the reclaimed water that has been stagnant in the end-user system for a long time. This is applicable to the situation where the residual amount of disinfectant in the reclaimed water influent is sufficient, but due to the intermittent use by the end-users, the reclaimed water stays in the end-system for too long, and the attenuation of the disinfectant leads to the concentration of pathogenic microorganisms exceeding the standard; 3) A comprehensive disinfection system, which is for the end-users located at the end of the reclaimed water transmission and distribution system and who use reclaimed water intermittently, but is applicable to the situation where the residual amount of disinfectant at the end of the reclaimed water transmission and distribution system is insufficient and the reclaimed water stays in the end-user for too long.

[0021] 4. For the intermittent use pattern of reclaimed water, the present utility model sets up an intelligent self-circulating circulating return pipeline. When the water flow retention time in the outlet pipe is too long, the circulating pump of the circulating return pipeline can be started. The stagnant water at the end can flow back into the inlet pipe through this circulating return pipeline and enter the disinfection device of the present utility model for re-disinfection treatment. This system can start the circulating pump manually or regularly, and reintroduce the stagnant water into the treatment process. In this process, the water will pass through the UV-TiO 2 -ClO 2 — ternary system treatment to ensure the continuous stability and high standard of water quality, and then re-discharge the water, ensuring the efficient operation and water quality safety of the entire water treatment system. Description of the Drawings

[0022] Figure 1 is the main view of the structure of the disinfection device of the present utility model;

[0023] Figure 2 is Figure 1 the top view of the pipe body part;

[0024] Figure 3 This is a schematic diagram of the installation structure of the sterilization lamp strip of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the titanium mesh of the present utility model.

[0026] Figure 5 This is a schematic diagram of the disinfection device of the present utility model used in the reclaimed water continuous disinfection system.

[0027] Figure 6 This is a schematic diagram of the disinfection device of the present utility model used in the end-user stagnant water disinfection system.

[0028] Figure 7 This is a schematic diagram of the disinfection device of the present utility model used in the reclaimed water comprehensive disinfection system.

[0029] In the figure: 1 - pipe body, 2 - water inlet pipe, 3 - water outlet pipe, 4 - UV-LED lamp beads, 5 - TiO2 nanotube array, 6 - cover body, 7 - sterilization lamp strip fixing plate, 8 - hydraulic rotary cleaner, 9 - isolation quartz sleeve, 10 - controller, 11 - sterilization lamp strip, 12 - titanium mesh. Specific embodiments

[0030] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1 、 2 、3, 4, 5, 6, 7, a disinfection device provided by an embodiment of the present utility model applied to the terminal of the reclaimed water distribution system,

[0032] including a pipe body 1, an inlet and an outlet are provided on the pipe body 1, a water inlet pipe 2 is connected to the inlet to introduce external water into the cavity inside the pipe body 1 through the water inlet pipe 2, and a water outlet pipe 3 is connected to the outlet to lead out the water inside the pipe body 1; in the figure, the inlet is arranged at the lower position of the pipe body 1, and the outlet is arranged at the upper position of the pipe body 1, forming a water flow structure with low inlet and high outlet.

[0033] In the cavity within the pipe body 1, an isolation sleeve 9 is provided. The isolation sleeve 9 is preferably made of a quartz sleeve, which has water isolation and insulation properties. The isolation sleeve 9 divides the cavity of the pipe body 1 into two inner and outer cavities. The water flowing in from the water inlet pipe 2 can only flow in the annular space outside the isolation sleeve 9 and cannot enter the annular cavity inside the isolation sleeve 9. In the outer cavity of the pipe body 1 through which water passes, a titanium mesh 12 is provided. The titanium mesh 12 is arranged along the height direction, and a uniformly arranged TiO2 nanotube array 5 is loaded on at least one surface of the titanium mesh 12. At the bottom end of the titanium mesh 12, a hydraulic rotary cleaner 8 is provided. The hydraulic rotary cleaner 8 rotates under the impact of the water flow, driving the titanium mesh 12 to rotate, so that the titanium mesh 12 and the TiO2 nanotube array 5 generate a self-cleaning effect during rotation. The TiO2 nanotube array 5 has photocatalytic self-cleaning characteristics and generates oxidants through photocatalytic reactions, which can decompose the organic dirt attached to the mesh surface, thereby keeping the mesh surface clean, improving the photocatalytic efficiency, and reducing the maintenance cost. Since the water flow rate entering the cavity of the pipe body 1 from the water inlet pipe 2 through the water inlet is relatively fast and has a certain impact force, it can drive the hydraulic rotary cleaner 8 to rotate. The hydraulic rotary cleaner 8 can adopt existing technologies, such as existing waterwheel structures, etc., and can rotate under the action of the water flow impact force. In order to enhance the impact force of the water flow, the water inlet pipe 2 can enter the cavity of the pipe body 1 from the tangential direction of the water inlet, so that the water flow generates a greater rotational impact force. As shown in the figure, the titanium mesh 12 is a ring structure and is arranged circumferentially around the outside of the isolation sleeve 9. In the present utility model, the titanium mesh 12 is arranged along the height direction, and uniformly arranged TiO2 nanotube arrays are in-situ formed on both the inner surface and the outer surface of the titanium mesh 12. The TiO2 nanotube array obtained in this way is more firmly combined with the substrate and has better mechanical stability. Compared with the traditional TiO2 coating method, it is more suitable for the reclaimed water supply system, avoiding problems such as coating peeling, difficult repair, and leakage, being easy to replace, and reducing costs

[0034] In the inner cavity of the isolation sleeve 9 of the pipe body 1, a sterilization lamp strip fixing plate 7 is provided. A sterilization lamp strip 11 is provided on the sterilization lamp strip fixing plate 7, and a number of UV-LED lamp beads 4 are provided on the sterilization lamp strip 11. The sterilization lamp strip 11 or the UV-LED lamp beads 4 are electrically connected to the controller 10. Under the action of the controller 10, power is supplied or cut off, and ultraviolet rays that produce an inducing effect are emitted and irradiated on the TiO2 nanotube array 5. At the upper end of the pipe body 1, a cover body 6 is provided to seal and tighten the upper end of the pipe body 1. The cover body 6 can be opened when needed to facilitate operations such as assembly, maintenance, and replacement.

[0035] The sterilization lamp belt fixing plate 7 of the present utility model is arranged in a polygon or in a ring. The triangular arrangement structure formed by three sterilization lamp belt fixing plates 7 shown in the figure is provided. The UV-LED lamp beads 4 provided on the sterilization lamp belt 11 face the TiO2 nanotube array 5, so as to ensure that the TiO2 nanotube array 5 can irradiate the ultraviolet rays emitted by the UV-LED lamp beads 4 whether in a static or rotating state.

[0036] The present utility model combines the sterilization and photocatalysis effects generated by the ultraviolet rays emitted by the UV-LED lamp beads 4, the photocatalytic activity of the TiO2 nanotube array 5, and the residual ClO2 in water — The continuous disinfection effect after being activated, and constructs a new type of UV-TiO 2 -ClO 2 — ternary system, which can instantaneously and effectively kill various pathogenic microorganisms, and at the same time degrade the organic pollutants in water, realizing the effects of deep purification of water body and continuous sterilization.

[0037] Such as Figure 5 、 6 、Figure 7 showing the schematic diagram of the reclaimed water continuous disinfection system, the schematic diagram of the end-user stagnant water disinfection system and the schematic diagram of the reclaimed water comprehensive disinfection system of the disinfection device of the present utility model. There are multiple groups of users set at the use end (the rear end of the water outlet pipe 3) of the disinfection device of the present utility model. When needed, the users open the control valve to use the reclaimed water disinfected by the disinfection device of the present utility model; at the rear end of the water outlet pipe 3, due to the existence of ClO2 in water, it has a continuous disinfection effect on the reclaimed water, ensuring the continuous stability and high standard of water quality; between the water outlet pipe 3 and the water inlet pipe 2 of the present utility model, a circulating return pipeline (shown by the dotted line in the figure) is provided. The rear end of the water outlet pipe 3 is connected to the water inlet pipe 2 of the disinfection device through the circulating return pipeline with a circulating pump; when the detection devices such as the pressure gauge and the water flow velocity gauge detect that the water in the water outlet pipe 3 or the circulating return pipeline has not flowed for a long time, that is, it has not flowed for more than the process-set time, or the water pressure in the water outlet pipe 3 changes abnormally, etc., this situation is judged as water stagnation. In this situation, the system sends a control signal to automatically (or manually) start the circulating pump on the circulating return pipeline, and return the stagnant water into the water inlet pipe 2 of the disinfection device of the present utility model through the circulating return pipeline, enter the disinfection device of the present utility model, and re-introduce it into the disinfection treatment process. In this process, the water will pass through the UV-TiO 2 -ClO 2 — ternary system of the disinfection device of the present utility model again to ensure the continuous stability and high standard of water quality, and then re-discharge water from the water outlet pipe 3, ensuring the efficient operation and water quality safety of the entire water treatment system.

[0038] The specific application scenarios and usage patterns in general cases of this utility model are listed in Table 1.

[0039] Table 1 Application Scenarios and Usage Patterns of Reclaimed Water after Treatment

[0040]

[0041] The above has introduced in detail a disinfection device applied to the terminal of a reclaimed water distribution system provided by an embodiment of this utility model. The above embodiments are only used to illustrate the technical solutions of this utility model rather than to limit them. Although the applicant has described this utility model in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of this utility model without departing from the purpose and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A disinfection device for use at a terminal of a reclaimed water distribution system, comprising a pipe body (1), wherein a water inlet and a water outlet are arranged on the pipe body (1), and wherein: The water inlet pipe (2) is connected to the water inlet to allow external water to enter the cavity in the tube body (1) through the water inlet pipe (2); the water outlet pipe (3) is connected to the water outlet to lead the water in the tube body (1) out; an isolation sleeve (9) is arranged in the cavity in the tube body (1) to separate the cavity of the tube body (1) into an inner cavity and an outer cavity; a titanium mesh (12) is arranged in the height direction in the outer cavity of the tube body (1) through which water flows; a uniformly arranged TiO2 nanotube array (5) is loaded on at least one side of the surface of the titanium mesh (12); a hydraulic rotary washer (8) is arranged at the bottom end of the titanium mesh (12); the hydraulic rotary washer (8) rotates under the impact of the water flow, driving the titanium mesh (12) to rotate; A sterilization light strip fixing plate (7) is arranged in the inner cavity of the isolation sleeve (9) of the tube body (1), a sterilization light strip (11) is arranged on the sterilization light strip fixing plate (7), a plurality of UV-LED lamp beads (4) are arranged on the sterilization light strip (11), and the sterilization light strip (11) or the UV-LED lamp beads (4) are electrically connected to a controller (10). When powered on by the controller (10), ultraviolet rays are emitted to irradiate the TiO2 nanotube array (5) with an inducing effect.

2. A disinfection device for use at a terminal of a reclaimed water distribution system according to claim 1, characterized in that: A cover body (6) is provided at the upper end of the tube body (1) to seal and tightly cover the upper end of the tube body (1).

3. A disinfection device for use at a terminal of a reclaimed water distribution system according to claim 1, characterized in that: The sterilization lamp strip fixing plate (7) is arranged in a polygonal shape or in a ring shape.

4. A disinfection device for use in a terminal of a reclaimed water distribution system according to claim 3, characterized in that: The three sterilization lamp strip fixing plates (7) form a triangular arrangement structure.

5. A disinfection device for use at a terminal of a reclaimed water distribution system according to any one of claims 1 to 4, characterized in that: The water inlet is arranged at a low position of the tube body (1); and the water inlet pipe (2) enters the cavity of the tube body (1) from a tangent direction of the water inlet.

6. A disinfection device for use at a terminal of a reclaimed water distribution system according to any one of claims 1 to 4, characterized in that: The TiO2 nanotube array (5) is generated in situ on a titanium mesh (12) with an annular structure and is circumferentially arranged around the outer side of the isolation sleeve (9).

7. A disinfection device for use at a terminal of a reclaimed water distribution system according to any one of claims 1 to 4, characterized in that: A circulation return pipeline is provided between the water outlet pipe (3) and the water inlet pipe (2). The rear end of the water outlet pipe (3) is connected to the water inlet pipe (2) via the circulation return pipeline with a circulation pump. The circulation pump on the circulation return pipeline is started to return water into the water inlet pipe (2) through the circulation return pipeline.

8. The disinfection device used in the terminal of the reclaimed water distribution system according to claim 5, characterized in that: A circulation return pipeline is provided between the water outlet pipe (3) and the water inlet pipe (2). The rear end of the water outlet pipe (3) is connected to the water inlet pipe (2) via the circulation return pipeline with a circulation pump. The circulation pump on the circulation return pipeline is started to return water into the water inlet pipe (2) through the circulation return pipeline.

9. A disinfection device for use at a terminal of a reclaimed water distribution system according to any one of claims 1 to 4, characterized in that: The TiO2 nanotube array (5) is evenly arranged on the titanium mesh (12).

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