Multi-level spraying structure for spraying purification tower

Abstract

The invention provides a multi-level spraying structure for a spraying purification tower, and relates to the technical field of spraying purification towers. According to the spray tower, a filling layer is arranged on the inner side of the spray tower, an outlet bin is arranged at the upper end of the spray tower, an air inlet is formed in the lower end of the spray tower, a circulating system is arranged below the spray tower and used for circulating liquid falling from the spray tower, and a supply ring is fixedly arranged on the inner side of the spray tower and communicated with the circulating system. And the water curtain spraying system is communicated with the supply ring and is used for spraying operation. According to the multi-level spraying structure for the spraying purification tower, double-level spraying operation is achieved through cooperation of the water curtain spraying system and the cage unit, the water curtain spraying system forms sheet-shaped water curtains to form a basic barrier, gaps between the water curtains are filled with the cage unit, a spraying environment without dead corners is formed in a spraying layer, the gas-liquid contact sufficiency is greatly improved, and the spraying efficiency is improved. The problem of airflow escape is effectively solved, and the purification efficiency is improved.

Description

A multi-stage spray structure for a spray purification tower Technical Field

[0001] This invention relates to the field of spray purification tower technology, specifically to a multi-stage spray structure for spray purification towers. Background Technology

[0002] Spray purification towers are commonly used equipment in industrial waste gas treatment. Their core function is to adsorb and purify particulate matter and soluble harmful gases in the gas stream by bringing the sprayed liquid into contact with the polluted airflow. Existing spray purification towers mostly use a fixed nozzle design, which suffers from uneven spray coverage and insufficient gas-liquid contact. Airflow "channels" can easily form in some areas, leading to low purification efficiency. Furthermore, the fixed nozzle angles of traditional spray structures prevent flexible adjustment of the spray range according to changes in waste gas volume and pollutant concentration, resulting in poor adaptability.

[0003] Existing spray systems only filter the returned liquid in the liquid recycling stage, lacking a hydraulic adjustment mechanism. This leads to unstable nozzle pressure and poor water curtain formation. Furthermore, the spray area is often a single layer and single-form spray, with gaps easily existing between the water curtains, allowing rising airflow to escape and further reducing purification efficiency. To address these technical shortcomings, there is an urgent need for a multi-stage spray structure that provides uniform spray coverage, sufficient gas-liquid contact, flexible adjustment, and strong adaptability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-stage spray structure for a spray purification tower, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A multi-stage spray structure for a spray purification tower includes a spray tower with a filling layer on its inner side, an outlet chamber at the upper end, and an air inlet at the lower end; a circulation system located below the spray tower for circulating the liquid falling from the spray tower; a supply ring fixedly located inside the spray tower and connected to the circulation system; a water curtain spray system connected to the supply ring for spraying operations; an adjustment system located above the supply ring for controlling the direction of the water curtain spray system; and a covering unit located at the center of the water curtain spray system and connected to the supply ring via a pipe.

[0006] Preferably, the water curtain spray system includes a positioning ring, a spray pipe, and an adjusting tooth. The positioning ring is fixedly connected to the inner circumferential surface of the supply ring, the spray pipe is rotatably connected to the positioning ring, the spray pipe is used to spray liquid, and the adjusting tooth is fixedly sleeved on the outside of the spray pipe and is rotatably connected to the positioning ring.

[0007] Preferably, the end of the spray pipe near the positioning ring is a cylindrical pipe, and the end away from the positioning ring is a conical pipe. Water curtain nozzles are provided on the outside of the spray pipe. The water curtain nozzles are elongated nozzles, and three groups of water curtain nozzles are arranged in an array on the lower half of the circumference of the spray pipe. The included angle between the water curtain nozzles is an acute angle.

[0008] Preferably, the circulation system includes a circulating water tank, a pressure regulating filter water tank, and a liquid riser. The circulating water tank is located at the lower end of the spray tower and is used to collect and store the liquid sprayed by the spray tower. The pressure regulating filter water tank is connected to the circulating water tank and has a built-in filter membrane for filtering the liquid. The pressure regulating filter water tank also has the function of regulating hydraulic pressure. The liquid riser is connected to the pressure regulating filter water tank, and the output end of the liquid riser is connected to the supply ring.

[0009] Preferably, the lower end of the spray tower is an air inlet layer, which is located above the circulating water tank. Above the air inlet layer is an array of spray layers. The filling layer is located at the lower end of the inner side of the spray layers. An observation window is provided on the periphery of the spray layers. The outlet chamber is located above the spray layers.

[0010] Preferably, the supply ring is fixedly disposed on the inner wall surface of the spray layer. The supply ring is hollow inside, and its lower end is tapered and inclined to fit against the inner wall of the spray layer. The liquid riser is connected to the supply ring.

[0011] Preferably, the enclosure unit includes a water-gathering nozzle, an aerosol spray hood, and a connecting pipe. The water-gathering nozzle is a conical hollow shell. One end of the connecting pipe is connected to the supply ring, and the other end is connected to the water-gathering nozzle. The aerosol spray hood is fitted around the outside of the water-gathering nozzle to control the liquid water flow sprayed from the water-gathering nozzle.

[0012] Preferably, the aerosol spray cover includes a positioning cover, an electric telescopic rod, and a flow control cover. The positioning cover is fixedly connected to the outside of the water-gathering nozzle. The flow control cover slides in contact with the inner wall of the water-gathering nozzle. The flow control cover is funnel-shaped and fitted onto the outside of the water-gathering nozzle's output port. An external airflow pipe is connected to the outside of the flow control cover. A cavity is formed between the flow control cover and the water-gathering nozzle. An electric telescopic rod is fixedly connected to the inside of the positioning cover. The free end of the electric telescopic rod is connected to the flow control cover to control the height position of the flow control cover.

[0013] Preferably, the adjustment system includes a corrosion-resistant cover, a linkage ring, and a pusher tooth. The corrosion-resistant cover is fixedly connected to the upper end of the supply ring and is located outside the linkage ring. The lower end of the linkage ring is provided with teeth that mesh with the adjustment teeth. The outer circumferential surface of the linkage ring is provided with teeth that mesh with the pusher tooth, and the pusher tooth is located inside the corrosion-resistant cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The multi-level spray structure for the spray purification tower achieves double-level spraying operation through the cooperation of the water curtain spraying system and the cover unit. The water curtain spraying system forms a sheet-like water curtain to form a basic barrier, and the cover unit fills the gaps between the water curtains, so that a spraying environment without dead angles is formed in the spraying layer, which greatly improves the fullness of gas-liquid contact, effectively solves the problem of airflow escape, and improves purification efficiency.

[0015] 2. This multi-stage spray structure for the spray purification tower, through the setting of an adjustment system, enables the push tooth to drive the linkage ring to rotate, thereby driving the spray pipe to rotate. The spray angle of the water curtain nozzles can be flexibly adjusted, and at the same time, the spray pipes can be oscillated back and forth with a small amplitude, changing the intersection position of the water curtain and making the spray coverage more uniform. The spray range can be flexibly adjusted according to the amount of waste gas treated and the concentration of pollutants, making it more adaptable and solving the problem of uneven spray concentration.

[0016] 3. The multi-stage spray structure used in the spray purification tower controls the height of the flow control hood by setting an electric telescopic rod in the enclosure unit. Combined with the pressurized airflow input from the external airflow pipe, the diffusion range and atomization degree of the liquid can be flexibly adjusted to achieve precise filling of the gaps in the water curtain. At the same time, the aerosol spray can further increase the gas-liquid contact area and improve the purification effect. The sheet-like airflow is blocked and covered to disperse and combine with the atomized spray, so that the airflow and the spray liquid can be in more sufficient contact. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the external structure of the spray tower of the present invention; Figure 3 is a schematic diagram of the internal structure of the spray tower of the present invention; Figure 4 is a schematic diagram of the position of the filling layer of the present invention; Figure 5 is a schematic diagram of the supply ring structure of the present invention; Figure 6 is a schematic diagram of the linkage ring structure of the present invention; Figure 7 is a schematic diagram of the spray pipe structure of the present invention; Figure 8 is a schematic diagram of the aerosol spray hood structure of the present invention; Figure 9 is a schematic diagram of the flow control hood structure of the present invention.

[0018] In the diagram: 1. Spray tower; 11. Packing layer; 12. Outlet chamber; 13. Air inlet; 131. Air inlet layer; 14. Spray layer; 141. Observation window; 2. Circulation system; 21. Circulating water tank; 22. Pressure regulating and filtering water tank; 23. Liquid riser pipe; 3. Supply ring; 4. Water curtain spray system; 41. Positioning ring; 42. Spray pipe; 421. Water curtain nozzle; 43. Adjusting gear; 5. Adjustment system; 51. Anti-corrosion cover; 52. Linkage ring; 53. Pushing gear; 6. Enclosure unit; 61. Water gathering nozzle; 62. Aerosol spray cover; 621. Positioning cover; 622. Electric telescopic rod; 623. Flow control cover; 624. External airflow pipe; 63. Connecting pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] As shown in Figures 1-9, a multi-stage spray structure for a spray purification tower includes a spray tower 1, a circulation system 2, a supply ring 3, a water curtain spray system 4, an adjustment system 5, and a cover unit 6. A filling layer 11 is provided inside the spray tower 1. An outlet chamber 12 is provided at the upper end of the spray tower 1, from which the purified airflow is discharged. An air inlet 13 is provided at the lower end, through which the purified airflow enters the tower body. The circulation system 2 is located below the spray tower 1 and is used to circulate the liquid falling from the spray tower 1, while simultaneously performing liquid filtration and hydraulic adjustment to ensure the cleanliness of the liquid source and stable pressure. The supply ring 3 is fixedly installed inside the spray tower 1 and is connected to the circulation system 2, serving as the connection point for the water curtain spray system 4 and the cover unit 6. The cover unit 6 transports liquid, and its hollow internal structure allows for uniform liquid distribution. The water curtain spray system 4 is connected to the supply ring 3 and is used to form a sheet-like water curtain to initially block and purify the rising airflow. The adjustment system 5 is located above the supply ring 3 and is used to control the direction of the water curtain spray system 4, allowing for flexible adjustment of the spray angle and coverage area. The cover unit 6 is located at the center of the water curtain spray system 4 and is connected to the supply ring 3 through a pipe. It is used to fill the gaps in the water curtain spray to achieve aerosol spraying, forming a multi-level full-coverage spray in conjunction with the water curtain spray. The control system is located outside the spray tower 1 and is used to control the start and stop of each motor, electric telescopic rod, and pressure regulating filter water tank.

[0024] In an optional embodiment, the water curtain spray system 4 includes a positioning ring 41, a spray pipe 42, and an adjusting tooth 43. The positioning ring 41 is fixedly connected to the inner circumferential surface of the supply ring 3, providing fixed and rotating support for the spray pipe 42. The spray pipe 42 is rotatably connected to the positioning ring 41. The spray pipe 42 is used to spray liquid and is made of corrosion-resistant and wear-resistant material to adapt to industrial spraying environments. The adjusting tooth 43 is fixedly sleeved on the outside of the spray pipe 42 and is rotatably connected to the positioning ring 41. The adjusting tooth 43 provides a transmission basis for the rotation of the spray pipe 42 and achieves angle adjustment of the spray pipe 42 through meshing with the adjustment system 5.

[0025] In this embodiment, the spray pipes 42 are arranged in a circular array inside the positioning ring 41 to ensure the initial coverage of the water curtain. The included angle between adjacent spray pipes 42 is an acute angle to avoid excessive initial overlap of the water curtain, which could lead to spray blind spots.

[0026] In an optional embodiment, the end of the spray pipe 42 near the positioning ring 41 is a cylindrical pipe to ensure a tight seal for rotational connection with the positioning ring 41, while the end away from the positioning ring 41 is a tapered pipe, which can pressurize and guide the liquid, increase the liquid outlet pressure of the water curtain nozzle 421, and enable the spray liquid to cover the spray chamber. The water curtain nozzle 421 is provided on the outside of the spray pipe 42. The water curtain nozzle 421 is a long strip nozzle, and three sets of water curtain nozzles 421 are arranged in an array on the lower half of the circumference of the spray pipe 42. The included angle between the water curtain nozzles 421 is an acute angle. The acute angle setting can make the water curtain sprayed by the three sets of water curtain nozzles 421 diffuse downward, increasing the contact area with the rising airflow.

[0027] In this embodiment, the elongated nozzle of the water curtain nozzle 421 ensures that the sprayed water curtain is a continuous and uniform sheet, and the array of spray pipes 42 makes the water curtain sprayed by the water curtain nozzle 421 multi-layered, increasing the fault tolerance of the water curtain nozzle 421.

[0028] In an optional embodiment, the circulation system 2 includes a circulating water tank 21, a pressure regulating filter water tank 22, and a riser pipe 23. The circulating water tank 21 is located at the lower end of the spray tower 1 and is used to collect and store the liquid sprayed by the spray tower 1. The pressure regulating filter water tank 22 is connected to the circulating water tank 21. The pressure regulating filter water tank 22 has a built-in filter membrane for filtering the liquid. The filter membrane can effectively filter solid particles in the return liquid and prevent nozzle clogging. The pressure regulating filter water tank 22 has the function of regulating hydraulic pressure. It is equipped with a hydraulic sensor and a pressure regulating valve inside, which can monitor and adjust the pressure of the output liquid in real time. The riser pipe 23 is connected to the pressure regulating filter water tank 22. The output end of the riser pipe 23 is connected to the supply ring 3. A booster pump is installed on the riser pipe 23 to provide power for liquid transportation.

[0029] In this embodiment, the filter membrane of the pressure regulating filter water tank 22 is a detachable structure, which is convenient for staff to replace and clean regularly. The volume of the pressure regulating filter water tank 22 is larger than the volume of the spray layer 14 to ensure the reserve of liquid circulation.

[0030] In an optional embodiment, the lower end of the spray tower 1 is an air inlet layer 131, which is located above the circulating water tank 21. An airflow distribution plate is provided on the inner side of the air inlet layer 131 to allow the airflow entering from the air inlet 13 to diffuse upwards evenly, avoiding insufficient purification caused by excessively fast local airflow velocity. Above the air inlet layer 131, an array of spray layers 14 is arranged. A filling layer 11 is located at the lower end of the inner side of the spray layer 14. An observation window 141 is provided on the periphery of the spray layer 14 to facilitate real-time observation of the operation within the spray layer 14 by the staff. An outlet chamber 12 is located above the spray layer 14. An demister layer is provided on the inner side of the outlet chamber 12 to remove droplets from the purified airflow, preventing droplets from being discharged with the airflow and causing water waste.

[0031] In this embodiment, the spray layer 14 is the core area of ​​the spraying operation, with a height of 2-3m, ensuring sufficient space for gas-liquid contact. The filling layer 11 is located at the lower end of the inner side of the spray layer 14, and the distance between the lower end of the filling layer 11 and the upper end of the air inlet layer 131 is 30-50cm, to avoid the filler from falling off due to the airflow directly impacting the filling layer 11.

[0032] In an optional embodiment, the supply ring 3 is fixedly disposed on the inner wall surface of the spray layer 14. The hollow surface inside the supply ring 3 is coated with an anti-corrosion coating, and the lower end is tapered and inclined to fit against the inner wall of the spray layer 14 to prevent the spray liquid from accumulating on the surface of the supply ring 3. The liquid riser pipe 23 is connected to the supply ring 3.

[0033] In this embodiment, the inner side of the supply ring 3 is provided with multiple liquid outlets, which are respectively connected to the spray pipe 42 and the connecting pipe 63 to achieve uniform liquid distribution.

[0034] In an optional embodiment, the enclosure unit 6 includes a water-gathering nozzle 61, an aerosol spray hood 62, and a connecting pipe 63. The lower end of the water-gathering nozzle 61 is a conical shell, and its conical structure can realize the convergence and pressurization of liquid. One end of the connecting pipe 63 is connected to the supply ring 3, and the other end is connected to the water-gathering nozzle 61. The aerosol spray hood 62 is sleeved on the outside of the water-gathering nozzle 61 and is used to control the liquid flow sprayed by the water-gathering nozzle 61.

[0035] In this embodiment, the covering unit 6 realizes the atomization and diffusion range adjustment of the liquid and fills the gaps in the water curtain of the water curtain spray system 4.

[0036] In an optional embodiment, the aerosol spray nozzle 62 includes a positioning cover 621, an electric telescopic rod 622, and a flow control cover 623. The positioning cover 621 is fixedly connected to the outside of the water-collecting nozzle 61, providing fixed support for the electric telescopic rod 622. The flow control cover 623 slides in contact with the inner wall of the water-collecting nozzle 61. The flow control cover 623 is funnel-shaped and sleeved on the outside of the outlet of the water-collecting nozzle 61. Its funnel-shaped structure can achieve full mixing of liquid and airflow. The outside of the flow control cover 623 is connected to an external... The airflow duct 624 is an external airflow duct that inputs pressurized airflow into the flow control hood 623. A cavity is formed between the flow control hood 623 and the water-collecting nozzle 61. The pressurized airflow mixes with the liquid in the cavity to achieve liquid atomization. An electric telescopic rod 622 is fixedly connected to the inside of the positioning cover 621. The free end of the electric telescopic rod 622 is connected to the flow control hood 623 to control the height position of the flow control hood 623, thereby adjusting the volume of the cavity and adjusting the degree of atomization and the diffusion range.

[0037] In this embodiment, the inner wall of the flow control hood 623 is provided with spiral guide patterns, which can make the liquid and airflow mix in a spiral shape, thereby improving the atomization effect. The airflow pressure of the external airflow pipe 624 is matched with the hydraulic pressure of the pressure regulating filter water tank 22 to ensure the stability of the atomization effect.

[0038] In an optional embodiment, the adjustment system 5 includes a corrosion-resistant cover 51, a linkage ring 52, and a pusher tooth 53. The corrosion-resistant cover 51 is fixedly connected to the upper end of the supply ring 3. The corrosion-resistant cover 51 is located outside the linkage ring 52 to prevent the sprayed liquid and corrosive airflow from corroding the transmission components and to improve the service life of the equipment. The lower end of the linkage ring 52 is provided with teeth that mesh with the adjusting teeth 43. The outer circumferential surface of the linkage ring 52 is provided with teeth that mesh with the pusher tooth 53. The pusher tooth 53 is located inside the corrosion-resistant cover 51.

[0039] In this embodiment, the pusher tooth 53 is driven by the motor to achieve forward and reverse rotation, which drives the linkage ring 52 to rotate back and forth, thereby realizing the small-amplitude back and forth swing of the spray pipe 42, changing the intersection position of the water curtain, and making the spray coverage more uniform.

[0040] In use, the airflow to be purified is first pressurized and input into the air intake layer 131 through the air inlet 13. The liquid to be sprayed is then injected into the circulation system 2. After the liquid is pressurized and adjusted by the pressure regulating filter water tank 22, it is transported to the supply ring 3 through the liquid riser pipe 23. The supply ring 3 disperses the liquid into the spray pipe 42, so that the water curtain nozzles 421 of the spray pipe 42 can spray out sheet-like water curtains. After the water curtain nozzles 421 spray out the water curtains, the water curtains of each spray pipe 42 intersect to form a barrier. The airflow passes through the barrier and fully combines with it. By starting the motor, the push gear 53 is driven to rotate, which drives the linkage ring 52 to rotate back and forth. This allows the adjusting gear 43 to drive the spray pipe 42 to rotate, so that the spray angle of the water curtain nozzles 421 can be changed. Furthermore, by slightly oscillating the water curtain nozzles 421, the intersection position of the water curtains can be adjusted. The changes make the spraying more uniform. At the same time, the supply ring 3 is connected to the water-gathering nozzle 61 through the connecting pipe 63. The water-gathering nozzle 61 sprays liquid from below. The distance between the waistline of the flow control hood 623 and the water-gathering nozzle 61 is controlled by activating the electric telescopic rod 622. Pressurized airflow is provided to the cavity between the flow control hood 623 and the water-gathering nozzle 61 through the external airflow pipe 624, so that the liquid sprayed by the flow control hood 623 can be evenly diffused. The gaps left when the water curtain nozzle 421 sprays water curtain can be filled by the liquid sprayed by the flow control hood 623, so that a uniform and layered spraying environment is formed in the spray layer 14. The rising airflow can fully contact the sprayed liquid. After spraying, the liquid falls into the circulating water tank 21 after passing through the filling layer 11. After being filtered and the pressure adjusted by the pressure regulating filter water tank 22, it re-enters the supply ring 3.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage spray structure for a spray purification tower, characterized in that: include: Spray tower (1), the inner side of the spray tower (1) is provided with a filling layer (11), the upper end of the spray tower (1) is provided with an outlet chamber (12), and the lower end is provided with an air inlet (13); Circulation system (2), the circulation system (2) is located below the spray tower (1) and is used to circulate the liquid falling from the spray tower (1); Supply ring (3), the supply ring (3) is fixedly located inside the spray tower (1) and is connected to the circulation system (2); Water curtain spray system (4), the water curtain spray system (4) is connected to the supply ring (3) and is used for spraying operations; Adjustment system (5), the adjustment system (5) is located above the supply ring (3) and is used to control the direction of the water curtain spray system (4); Covering unit (6), the covering unit (6) is located in the center of the water curtain spray system (4) and is connected to the supply ring (3) through a pipe.

2. The multi-stage spray structure for a spray purification tower according to claim 1, characterized in that: The water curtain spray system (4) includes a positioning ring (41), a spray pipe (42), and an adjusting tooth (43). The positioning ring (41) is fixedly connected to the inner circumferential surface of the supply ring (3). The spray pipe (42) is rotatably connected to the positioning ring (41). The spray pipe (42) is used to spray liquid. The adjusting tooth (43) is fixedly sleeved on the outside of the spray pipe (42). The adjusting tooth (43) is rotatably connected to the positioning ring (41).

3. A multi-stage spray structure for a spray purification tower according to claim 2, characterized in that: The spray pipe (42) has a cylindrical pipe at one end near the positioning ring (41) and a tapered pipe at the other end away from the positioning ring (41). A water curtain nozzle (421) is provided on the outside of the spray pipe (42). The water curtain nozzle (421) is a long strip nozzle. Three sets of water curtain nozzles (421) are arranged in an array on the lower half of the circumference of the spray pipe (42). The included angle between the water curtain nozzles (421) is an acute angle.

4. A multi-stage spray structure for a spray purification tower according to claim 1, characterized in that: The circulation system (2) includes a circulating water tank (21), a pressure regulating filter water tank (22), and a liquid lifting pipe (23). The circulating water tank (21) is located at the lower end of the spray tower (1) and is used to hold and store the liquid sprayed by the spray tower (1). The pressure regulating filter water tank (22) is connected to the circulating water tank (21). The pressure regulating filter water tank (22) has a built-in filter membrane for filtering the liquid. The pressure regulating filter water tank (22) has the function of regulating hydraulic pressure. The liquid lifting pipe (23) is connected to the pressure regulating filter water tank (22). The output end of the liquid lifting pipe (23) is connected to the supply ring (3).

5. A multi-stage spray structure for a spray purification tower according to claim 4, characterized in that: The lower end of the spray tower (1) is an air inlet layer (131), which is located at the upper end of the circulating water tank (21). Above the air inlet layer (131) is an array of spray layers (14). The filling layer (11) is located at the lower end of the inner side of the spray layer (14). The spray layer (141) is provided with an observation window (141) on the periphery of the spray layer (14). The outlet chamber (12) is located above the spray layer (14).

6. A multi-stage spray structure for a spray purification tower according to claim 5, characterized in that: The supply ring (3) is fixedly installed on the inner wall surface of the spray layer (14). The supply ring (3) is hollow inside, and its lower end is tapered and inclined to fit against the inner wall of the spray layer (14). The liquid riser pipe (23) is connected to the supply ring (3).

7. A multi-stage spray structure for a spray purification tower according to claim 3, characterized in that: The enclosure unit (6) includes a water-gathering nozzle (61), an aerosol spray hood (62), and a connecting pipe (63). The water-gathering nozzle (61) is a conical shell. One end of the connecting pipe (63) is connected to the supply ring (3), and the other end is connected to the water-gathering nozzle (61). The aerosol spray hood (62) is fitted around the outside of the water-gathering nozzle (61) to control the liquid water flow sprayed by the water-gathering nozzle (61).

8. A multi-stage spray structure for a spray purification tower according to claim 7, characterized in that: The aerosol spray hood (62) includes a positioning hood (621), an electric telescopic rod (622), and a flow control hood (623). The positioning hood (621) is fixedly connected to the outside of the water-collecting nozzle (61). The flow control hood (623) slides in contact with the inner wall of the water-collecting nozzle (61). The flow control hood (623) is funnel-shaped and fitted onto the outside of the output port of the water-collecting nozzle (61). An external airflow pipe (624) is connected to the outside of the flow control hood (623). A cavity is formed between the flow control hood (623) and the water-collecting nozzle (61). An electric telescopic rod (622) is fixedly connected to the inside of the positioning hood (621). The free end of the electric telescopic rod (622) is connected to the flow control hood (623) to control the height position of the flow control hood (623).

9. A multi-stage spray structure for a spray purification tower according to claim 2, characterized in that: The adjustment system (5) includes a corrosion-resistant cover (51), a linkage ring (52), and a pusher tooth (53). The corrosion-resistant cover (51) is fixedly connected to the upper end of the supply ring (3). The corrosion-resistant cover (51) is located outside the linkage ring (52). The lower end of the linkage ring (52) is provided with teeth that mesh with the adjustment tooth (43). The outer circumferential surface of the linkage ring (52) is provided with teeth that mesh with the pusher tooth (53). The pusher tooth (53) is located inside the corrosion-resistant cover (51).

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