A system and method for monitoring and automatically administering Legionella pneumophila in subway cooling towers

Abstract

The present invention discloses a system and method for monitoring and automatically dosing Legionella pneumophila in a subway cooling tower, comprising a control box, a disinfectant storage cabinet, a water quality detection probe, and a wireless digital display terminal arranged in the cooling tower. The control box is sequentially provided with a water pump, a control detection unit 3, and a power supply, and a spray unit is provided on the top of the control box. The control detection unit controls the water pump to extract disinfectant from the disinfectant storage cabinet and transport it to the spray unit according to program settings. The spray unit sprays and doses the inside of the cooling tower cylinder in all directions to achieve systematic disinfection of the cooling tower. The water quality detection probe transmits the detected water quality parameters to the control detection unit, which is converted into a wireless signal and then sent to the wireless digital display terminal for detecting the water quality condition. At the same time, the wireless digital display terminal can set a disinfectant concentration threshold, and control the system to perform spray disinfection operations in the cooling tower according to the disinfectant concentration threshold, thereby effectively inhibiting the growth of microorganisms in the cooling tower.

Description

Technical Field

[0001] The present invention belongs to the technical field of monitoring and disinfecting of Legionella pneumophila, and more specifically, relates to a system and method for monitoring and automatically dosing Legionella pneumophila in a subway cooling tower. Background Art

[0002] Legionnaires' disease is caused by Legionella bacteria. Of the more than 30 identified species of Legionella, 19 can cause pneumonia in humans. Air conditioning system cooling towers are the primary source of contamination in Legionnaires' disease outbreaks, accounting for 60-80% of cases. According to surveys, the positive detection rate for Legionella pneumophila in subway cooling tower water exceeds 90%. Even after cleaning and disinfection, the positive detection rate for Legionella pneumophila in cooling tower water remains as high as around 50%. According to the "Hygienic Standards for Centralized Air Conditioning and Ventilation Systems in Public Places" (WS 394-2012), public places must "clean open cooling towers at least once a year." The "Hygienic Standards for the Operation and Management of Air Conditioning and Ventilation Systems in Offices and Public Places during the COVID-19 Pandemic" (WS 696-2012) also stipulates that cooling towers should be cleaned, disinfected, or replaced weekly during the epidemic. During routine operation and maintenance, to prevent the growth of microorganisms such as Legionella pneumophila, health authorities often recommend maintaining a certain disinfectant concentration in cooling tower water.

[0003] At present, cooling towers are often disinfected by manual or mechanical dosing during routine operation and maintenance. Although manual dosing is the simplest method, it requires certain technical skills from the disinfection personnel, who must have a certain understanding of the internal structure of the cooling tower. The actual disinfection effect often varies greatly due to technical factors or personnel quality. In addition, the disinfectant is corrosive to a certain extent, which has a certain impact on the health of the disinfection personnel in the closed environment of the cooling tower. Mechanical dosing disinfection currently mostly uses drip or spray dosing, and the dosing location is mostly single-point dosing, which cannot cover the entire inner wall of the cooling tower. Disinfection is often incomplete, and single-point dosing causes the disinfectant concentration in the dosing area on the inner wall of the cooling tower to be too high, leading to corrosion of the cooling tower cylinder. In addition, the storage tanks for mechanical dosing disinfection are often located inside or around the cooling tower. In high temperature and high humidity conditions outdoors, the disinfectant is difficult to store stably, which has a serious impact on the disinfection effect. Existing disinfection methods do not detect the disinfectant and microbial concentrations in cooling water bodies in real time. Therefore, after disinfection, it is impossible to monitor whether the disinfectant in the cooling tower has reached the specified concentration or has evaporated and become ineffective. Disinfection cannot be carried out in a timely manner according to the water sample conditions, posing a potential hazard to the ventilation, hygiene and safety of public places. Summary of the Invention

[0004] In view of the fact that the existing technology does not thoroughly disinfect the cooling tower and cannot monitor the cooling water in the cooling tower in real time, the present invention provides a system and method for monitoring and automatically dosing Legionella pneumophila in subway cooling towers, which can monitor the cooling water in real time and automatically dosing and disinfecting according to water source monitoring data.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a system for monitoring and automatically dosing Legionella pneumophila in a subway cooling tower is provided, which comprises a control box, which is arranged on the load-bearing plate in the cooling tower; a dosing mechanism, which comprises a spray unit arranged on the top of the control box, a water pump arranged inside the control box and a disinfectant storage cabinet arranged in the cooling water body in the cooling tower, wherein the water pump extracts disinfectant from the disinfectant storage cabinet and transports it to the spray unit; a monitoring and control mechanism, which comprises a control detection unit and a power supply arranged in the control box, a water quality detection probe arranged in the cooling water body in the cooling tower and a disinfectant storage cabinet arranged in the cooling water body in the cooling tower. The wireless digital display terminal on the tower shell, the power supply is electrically connected to the detection control unit, and the detection control unit is respectively communicated with the wireless digital display terminal and the water quality detection probe; wherein, the monitoring and control mechanism monitors various indicators of the water sample in real time through the water quality detection probe, and sends the detection data to the operator; the wireless digital display terminal automatically sends instructions to the detection control unit according to the threshold set by the operator and controls the dosing mechanism to start working; the spray unit rises in the vertical direction and forms a closed loop of the spray path in the horizontal direction, and comprehensively disinfects the inside of the cooling tower by spraying disinfectant at multiple angles.

[0006] Furthermore, two groups of spray units are symmetrically provided on the top of the control box, and the spray units are communicatively connected to the detection control unit, and include a lifting and rotating seat; the lifting and rotating seat is provided on the top of the control box, and can be raised and lowered according to the height of the cooling tower, and a first rotating mechanism and a second rotating mechanism are provided on its outer side from top to bottom, and both are communicatively connected to the detection control unit respectively.

[0007] Furthermore, the spray unit also includes a first telescopic arm and a second telescopic arm, both of which have the same structure, wherein the first telescopic arm includes: a multi-section telescopic arm; a telescopic arm lifting mechanism arranged between the multi-section telescopic arms, which is communicatively connected to the control detection unit; a telescopic arm top opening provided at the top of the multi-section telescopic arm and a telescopic arm bottom opening provided at the bottom thereof, a rotary joint is provided on the telescopic arm top opening, and a thread is provided on the telescopic arm bottom opening, and the fixed connection between the first telescopic arm and the first rotating mechanism is achieved through the thread.

[0008] Furthermore, the spray unit also includes a first spray head and a second spray head. The first spray head is arranged at the top end of the first telescopic arm through a rotary joint, and the second spray head is arranged at the top end of the second telescopic arm through a rotary joint.

[0009] Furthermore, the lifting and rotating seat, the first telescopic arm, the second telescopic arm, the first rotating mechanism and the second rotating mechanism are all hollow structures, and the cavities therein are connected to form a sealed channel. The sealed channel can pass through a pull-out tube, and one end of the pull-out tube is connected to the first nozzle through a rotary joint, and the other end is connected to the water outlet of the water pump.

[0010] Preferably, the first nozzle includes: a water surface nozzle and a porous nozzle arranged on the top of the water surface nozzle, and the two have opposite spraying directions, wherein the water surface nozzle is provided with a water blocker, and the porous nozzle is provided with multiple nozzles with different spraying angles.

[0011] Preferably, the water outlet of the water pump is provided with a water outlet pipe and a five-way joint, one end of the water outlet pipe is connected to the water outlet of the water pump, and the other end is connected to the main connector of the five-way joint; the secondary connector of the five-way joint is connected to one end of the pull-out tube.

[0012] Preferably, a liquid level sensor is further provided in the disinfectant medicine storage cabinet, which is communicatively connected to the detection control unit.

[0013] Preferably, a base connecting plate is provided at the bottom of the control box, which includes an upper base connecting plate and a lower base connecting plate, and the two are clamped at the top and bottom of the load-bearing plate.

[0014] Preferably, the outer layers of the control box and the disinfectant medicine storage cabinet are provided with an anti-corrosion coating.

[0015] According to another aspect of the present invention, a method for monitoring and automatically administering Legionella pneumophila in a subway cooling tower is provided, comprising the steps of:

[0016] S100: Complete the setting of monitoring values such as disinfectant concentration threshold, various water sample detection warning indicators, and disinfectant reserve warning indicators on the wireless digital display terminal;

[0017] S200: When the control detection unit detects that the disinfectant concentration reaches the minimum threshold, the wireless digital display terminal automatically sends a command to the control detection unit to control the dosing mechanism to perform a spray disinfection operation in the cooling tower;

[0018] S300: The control and detection unit will regularly send the data of various water sample tests and disinfectant reserves to the operator through the wireless digital display terminal, and issue an alarm message when various indicators reach the warning value to prompt the operator to deal with abnormal conditions in time.

[0019] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0020] (1) The Legionella pneumophila monitoring and automatic dosing system in the subway cooling tower of the present invention detects the disinfectant concentration in the water body by providing a water quality detection probe. The wireless digital display terminal obtains the water quality detection data and automatically sends instructions to the detection unit to control the automatic dosing system to perform spray disinfection operations in the cooling tower, thereby ensuring the stability of the disinfectant concentration in the circulating water body and avoiding the growth of microorganisms.

[0021] (2) The Legionella pneumophila monitoring and automatic dosing system in the subway cooling tower of the present invention has four telescopic arms of the spray unit, and after the arms are unfolded, the nozzles at the top of the telescopic arms form four symmetrical spraying and disinfection points in the cooling tower. The disinfection principle fully draws on the principle of plum blossom point distribution for detection in public places. The lifting and rotating seat rises in the vertical direction to spray and disinfect the inner wall of the cooling tower cylinder, the fan at the top, and the cooling water at the bottom, thereby achieving comprehensive disinfection of the cooling tower.

[0022] (3) The Legionella pneumophila monitoring and automatic dosing system in the subway cooling tower of the present invention adopts a detachable design for the entire system, which is lightweight and convenient for use in cooling towers of various special terrains. The system design of the present invention fully considers the existing cooling tower structure, and no modification is required to the existing cooling tower structure during installation. The lifting and rotating seat in the system can be raised and lowered according to the height of the cooling tower, and the extended length of the telescopic arm of the spray unit can be adjusted according to the inner diameter of the cooling tower, so that the system of the present invention can be applied to various types of cooling towers.

[0023] (4) The Legionella pneumophila monitoring and automatic dosing system in the subway cooling tower of the present invention is designed to immerse the disinfectant storage cabinet in the cooling water in the cooling tower. It adopts a sealed and waterproof design and dissipates heat through the cooling water to control its temperature between 20° and 45°. This can ensure that the disinfectant is stably stored in the disinfectant storage cabinet and the disinfection effect is not affected by the ambient temperature.

[0024] (5) The Legionella pneumophila monitoring and automatic dosing system in the subway cooling tower of the present invention is provided with a nozzle, which includes a water surface nozzle and a porous nozzle arranged on the top of the porous nozzle, and the two nozzles have opposite spraying directions. The porous nozzle is provided with a plurality of nozzles with different spraying angles, so that the spray coverage area is wider; the initial spraying angle of the water surface nozzle is downward, and it can spray and disinfect the cooling water in the cooling tower; the water surface nozzle is also provided with a water stopper, and the water stopper can drive the first nozzle to rotate with the telescopic arm body as the central axis under the impact of the water flow, so that the first nozzle can spray and disinfect the cooling tower wall at multiple angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic structural diagram of a spray unit in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the telescopic arm structure in an embodiment of the present invention;

[0028] Figure 4The figure is a flow chart of the method for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to the present invention.

[0029] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-control box, 2-water pump, 21-water outlet pipe, 22-water inlet pipe, 3-control detection unit, 4-power supply, 5-spray unit, 51-lifting and rotating seat, 511-first rotating mechanism, 512 second rotating mechanism, 52-first telescopic arm, 521-telescopic arm top opening, 522-telescopic arm bottom opening, 523-telescopic arm lifting mechanism, 53-second telescopic arm, 54-first nozzle, 541-water surface nozzle, 542-porous nozzle, 55-second nozzle, 56-pulling pipe, 6-disinfectant storage cabinet, 7-water quality detection probe, 8-cooling tower, 81-load-bearing plate, 9-base connecting plate, 91-base upper connecting plate, 92-base lower connecting plate, 93-fixing bolt, 10-wireless digital display terminal. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1-3 As shown, an embodiment of the present invention provides a Legionella pneumophila monitoring and automatic dosing system in a subway cooling tower, comprising a control box 1, a dosing mechanism and a monitoring and control mechanism, wherein: the control box 1 is arranged on a load-bearing plate 81 in a cooling tower 8; the dosing mechanism comprises a spray unit 5 arranged on the top of the control box 1, a water pump 2 arranged inside the control box 1 and a disinfectant storage cabinet 6 arranged in the cooling water body in the cooling tower 8, the water pump 2 extracts disinfectant from the disinfectant storage cabinet 6 and transports it to the spray unit 5; the monitoring and control mechanism comprises a control detection unit 3 and a power supply 5 arranged in the control box 1, a water quality detection probe 7 arranged in the cooling water body in the cooling tower 8 and a wireless digital display terminal 10 arranged on the outer casing of the cooling tower 8, the power supply 4 is electrically connected to the detection control unit 3, and the detection control unit 3 is respectively communicated with the wireless digital display terminal 10 and the water quality detection probe 7. The monitoring and control mechanism monitors various indicators of the water sample in real time through the water quality detection probe 7, and sends the detection data to the operator. The wireless digital display terminal 8 automatically sends instructions to the detection control unit 3 according to the threshold set by the operator and controls the dosing mechanism to start working. The spray unit 5 sprays disinfectant at multiple angles to comprehensively disinfect the inside of the cooling tower 8.

[0032] like Figure 1As shown, the control box 1 adopts a sealed and waterproof design, and the outer layer of the box is coated with an anti-corrosion coating, which can effectively prevent high temperature, high humidity and disinfectants from corroding the box body. The control box 1 is fixed in the cooling tower 8 through a base connecting plate 9. The base connecting plate 9 includes an upper base connecting plate 91 and a lower base connecting plate 92. The two are clamped at the top and bottom of the inherent load-bearing plate 81 in the cooling tower 8 and fixed by bolts, wherein the top of the upper base connecting plate 91 is fixedly connected to the control box 1. A water pump 2, a detection control unit 3 and a power supply 4 are fixed in sequence in the control box 1, wherein the power supply 4 is electrically connected to the water pump 2 and the detection control unit 3 respectively to provide working power for the two. The detection control unit 3 is connected to the water pump 2 in communication and controls the water pump 2 to transport disinfectant for disinfection operations. A water inlet pipe 22 is provided on the water inlet of the water pump 2, one end of which is connected to the water inlet, and the other end extends from the water inlet pipe outlet opened on the side of the control box 1 and is connected to the disinfectant storage tank 6, so as to pump out the disinfectant in the disinfectant storage tank; a water outlet pipe 21 is provided on the water outlet of the water pump 2, one end of which is connected to the water outlet, and the other end is connected to the spray unit 5 provided on the top of the control box 1, so as to transport the disinfectant to the spray unit 5.

[0033] In a preferred embodiment of the present invention, the spray unit 5 is provided with two groups, which are symmetrically arranged at both ends of the top of the control box 1 to perform all-round disinfection on the inside of the cooling tower 8. Figure 2 As shown, the spray unit 5 includes a lifting and rotating seat 51, a first telescopic arm 52, a second telescopic arm 53, a first nozzle 54, a second nozzle 55 and a pulling pipe 56, wherein the lifting and rotating seat 51 is arranged on the top of the control box 1, and is communicated with the detection control unit 3. It can be raised and lowered under the control of the detection control unit 3, so that the dosing mechanism is suitable for cooling towers 8 of different heights, avoiding the dilemma of not being able to spray and disinfect the top of the cylinder of the cooling tower 8 due to insufficient height, so that the dosing mechanism can fully disinfect the cooling tower 8. The outer side of the lifting and rotating seat 51 is provided with a first rotating mechanism 511 and a second rotating mechanism 512 from top to bottom, both of which are communicated with the detection control unit 3 respectively. Under the control of the detection control unit 3, both rotate in opposite directions at the same time. The bottom end of the first telescopic arm 52 is fixedly connected to the first rotating mechanism 511, and the bottom end of the second telescopic arm 53 is fixedly connected to the second rotating mechanism 512. Driven by the first rotating mechanism 511 and the second rotating mechanism 512, the first telescopic arm 52 and the second telescopic arm 53 rotate in opposite directions in the horizontal direction. The disinfectant is sprayed along the rotation direction of the first telescopic arm 52 and the second telescopic arm 53 through the first nozzle 54 provided at the top of the first telescopic arm 52 and the second nozzle 55 provided at the top of the second telescopic arm 53. By providing two groups of spray units 5, four spray points are formed after the telescopic arms are unfolded, and the spraying path of the disinfectant forms a closed loop in the horizontal direction, thereby ensuring the comprehensiveness of the disinfection in the cooling tower 8.

[0034] In another real-time embodiment of the present invention, the first nozzle 54 is arranged at the top of the first telescopic arm 52, and can rotate with the telescopic arm body as the central axis; the first nozzle 54 includes a water surface nozzle 541 and a porous nozzle 542 arranged on the top of the porous nozzle 541, and the two have opposite spraying directions, wherein the porous nozzle 541 is provided with a plurality of nozzles with different spraying angles, so that its spray coverage area is wider; the initial spraying angle of the water surface nozzle 541 is downward, and it can spray and disinfect the cooling water in the cooling tower 8. Preferably, the water surface nozzle 541 is also provided with a water blocker, and the water blocker can drive the first nozzle 54 to rotate with the telescopic arm body as the central axis under the impact of the water flow, so that the first nozzle 54 sprays and disinfects the tower wall of the cooling tower 8 at multiple angles.

[0035] like Figure 3 As described, in the embodiment of the present invention, the first telescopic arm 52 and the second telescopic arm 53 have the same structure and are provided with multiple telescopic arms. The expanded length of the telescopic arms can be adjusted according to the inner diameter of the cooling tower 8, so that the system of the present invention can be applied to cooling towers 8 of various diameters. The first telescopic arm 52 is a hollow structure, including a telescopic arm top opening 521 at its top, a telescopic arm bottom opening 522 at its bottom, and a telescopic arm lifting mechanism 523 between its multiple telescopic arms; wherein the telescopic arm top opening 521 is provided with a rotary joint, and the connection between the top of the first telescopic arm 52 and the first nozzle 54 is achieved through the rotary joint, so that the first nozzle 54 can rotate around the rotary joint to achieve a closed loop of its spraying path in the vertical plane; the telescopic arm lifting mechanism 523 is communicated with the control and detection unit 3, and the speed and length of the extension of the first telescopic arm 52 can be adjusted under the control of the control and detection unit 3. By pushing the first nozzle 54 by the first telescopic arm 52, all-round and dead-angle-free spraying and disinfection operations can be achieved within the extended arm length of the first telescopic arm 52; the telescopic arm bottom opening 522 is provided with a thread, and a fixed connection with the first rotating mechanism 511 is achieved through the thread.

[0036] In the embodiment of the present invention, in order to better transmit the disinfectant to the first nozzle 54 as the first telescopic arm 52 and the second telescopic arm 53 are deployed, a pulling tube 56 is used to adapt to the telescopic adjustment of the lifting and rotating seat 51, the first telescopic arm 52 and the second telescopic arm 53, so as to avoid damage to the ordinary delivery tube caused by force pulling during the extension and retraction process. Furthermore, the pulling tube 56 is connected to the water outlet pipe 21 via a five-way joint, wherein the main connector of the five-way joint is connected to one end of the water outlet pipe 21, and the other four auxiliary connectors are respectively connected to the spray unit 5 via the pulling tube 56; further, in order to prevent external high-temperature and high-humidity water vapor from entering the control box 1 and causing damage to the components in the control box 1, the lifting and rotating seat 51, the first telescopic arm 52, the second telescopic arm 53, the first rotating mechanism 511 and the second rotating mechanism 512 are all hollow structures, which are provided with cavities connected to form a sealed channel, which can prevent water vapor from entering while passing through the pulling tube 56, thereby avoiding the situation of poor sealing caused by setting an outlet for the pulling tube 56 on the control box 1. Figure 1 and 3 As shown in the figure, one end of the pulling tube 56 is connected to the first nozzle 54 through a rotary joint provided at the top opening 521 of the telescopic arm, and the other end passes through the bottom opening 522 of the telescopic arm, the first rotating mechanism 511, and the cavity provided in the lifting and rotating seat 51 in sequence to enter the cooling tower 8, and is connected to the auxiliary connector of the 5-way connector provided on the water outlet pipe 21. During the extension and retraction process of the first telescopic arm 52, the telescopic structure of the pulling tube 56 can be extended or contracted accordingly to transport the disinfectant to the first nozzle 54 for spraying operation.

[0037] In order to prevent the disinfectant from becoming ineffective in a high temperature and high humidity environment, the disinfectant medicine storage cabinet 6 described in the embodiment of the present invention is immersed in the cooling water body in the cooling tower 8. The outer layer of the box is coated with an anti-corrosion coating, and the entire box adopts a sealed and waterproof design. The heat is dissipated by the cooling water body, so that its temperature is controlled between 20° and 45°, which can ensure that the disinfectant is stably stored in the disinfectant medicine storage cabinet 6; further, a liquid level sensor is also provided in the disinfectant medicine storage cabinet 6, which is communicated with the detection control unit 3 and can monitor the storage amount of the disinfectant in real time.

[0038] In this experimental novel embodiment, in accordance with the provisions of WS 394-2012, "Sanitary Standards for Centralized Air Conditioning and Ventilation Systems in Public Places," a water quality detection probe 7 is provided within the cooling water body within the cooling tower 8. The probe is located at the center of the water tank within the cooling tower 8, which serves as both the cooling tower circulating water flow hole and the center of the tower water body. This location can be used to monitor indicators such as water depth, water temperature, turbidity, conductivity, pH value, and free residual chlorine. The water quality detection probe 7 is connected to the control and detection unit 3 by a cable passing through a cable hole opened on the side of the control box 1, thereby transmitting the detection data to the control and detection unit 3. Furthermore, a wireless digital display terminal 10 is provided on the outer shell of the cooling tower 8, which communicates wirelessly with the control and detection unit 3 and can receive water quality detection data forwarded by the control and detection unit 3, so that the operator outside the cooling tower 8 can obtain the water quality data in the cooling tower 8 through the wireless digital display terminal 10. The operator can also set an interval time period on the wireless digital display terminal 10 to send information, and can know the water source status in the cooling tower 8 through the wireless terminal, so that the operator does not need to go to the site to check in person, thereby reducing the operator's workload; at the same time, the operator can control the system through the wireless digital display terminal 10 to perform drug dosing and disinfection operations without entering the cooling tower 8 for further disinfection, thereby protecting the health and safety of the operator; further, the wireless digital display terminal 10 can set the minimum threshold value of the disinfectant concentration of the water body in the cooling tower. Through the acquired detection data, when the disinfectant concentration reaches the minimum threshold value, it automatically sends an instruction to the control and detection unit 3 to control the automatic drug dosing system to perform spray disinfection operations in the cooling tower 8, which can effectively inhibit the growth of microorganisms in the cooling tower.

[0039] The present invention's Legionella pneumophila monitoring and automatic drug dispensing system for subway cooling towers features a spray unit 5 whose four telescopic arms, when deployed, creates four symmetrical spray and disinfection points within the cooling tower 8. This disinfection principle draws upon the plum blossom pattern of detection points used in public spaces. As the lifting and rotating base 51 rises vertically, it sprays and disinfects the inner wall of the cooling tower cylinder, the fan at the top, and the cooling water at the bottom, achieving comprehensive disinfection of the cooling tower. Furthermore, a water quality detection probe 7 is installed in the center of the cooling tower water body 8 to detect the disinfectant concentration in the water. Spray disinfection is performed based on the minimum disinfectant concentration threshold, ensuring the stability of the disinfectant concentration in the circulating water and preventing microbial growth. The overall system features a detachable design and a lightweight design, making it suitable for use in cooling towers located in various unique terrains. Furthermore, the design fully considers existing cooling tower structures, eliminating the need for modification to existing structures. Cooling towers typically operate in spring, summer, and autumn, so they can be disassembled in winter for maintenance, extending their service life.

[0040] like Figure 4 As shown, in another embodiment of the present invention, a method for monitoring and automatically administering Legionella pneumophila in a subway cooling tower is provided, comprising the following steps:

[0041] S100: completing the setting of monitoring values such as disinfectant concentration threshold, various water sample detection warning indicators, and disinfectant reserve warning indicators on the wireless digital display terminal 10;

[0042] S200: When the control detection unit 3 detects that the disinfectant concentration reaches the minimum threshold, the wireless digital display terminal 10 automatically sends a command to the control detection unit 3 to control the automatic dosing system to perform a spray disinfection operation in the cooling tower 8;

[0043] S300: The control detection unit 3 regularly sends the data of various tests on the monitored water samples and the disinfectant reserves to the operator through the wireless digital display terminal 10, and issues an alarm message when various indicators reach the warning value to prompt the operator to deal with the abnormal situation in time.

[0044] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for monitoring and automatically administering Legionella pneumophila in subway cooling towers, characterized in that: include: A control box (1) is provided on a load-bearing plate (81) in a cooling tower (8); The dosing mechanism comprises a spray unit (5) arranged on the top of a control box (1), a water pump (2) arranged inside the control box (1), and a disinfectant storage cabinet (6) arranged in the cooling water body in the cooling tower (8), wherein the water pump (2) extracts the disinfectant from the disinfectant storage cabinet (6) and transports it to the spray unit (5); the disinfectant storage cabinet (6) is immersed in the cooling water body in the cooling tower (8), and the outer layer of the box is coated with an anti-corrosion coating. The entire box adopts a sealed and waterproof design, and heat is dissipated by the cooling water body so that its temperature is controlled between 20°C and 45°C, thereby ensuring that the disinfectant is stably stored in the disinfectant storage cabinet (6); by providing two groups of spray units (5), four spray points are formed after the telescopic arms are unfolded, and the spraying path of the disinfectant forms a closed loop in the horizontal direction, thereby ensuring the comprehensiveness of the disinfection in the cooling tower (8); A monitoring and control mechanism, comprising a control detection unit (3) and a power supply (4) provided in the control box (1), a water quality detection probe (7) provided in the cooling water body in the cooling tower (8), and a wireless digital display terminal (10) provided on the outer shell of the cooling tower (8), wherein the power supply (4) is electrically connected to the control detection unit (3), and the control detection unit (3) is respectively connected to the wireless digital display terminal (10) and the water quality detection probe (7); The monitoring and control mechanism monitors various indicators of the water sample in real time through the water quality detection probe (7) and sends the detection data to the operator. The wireless digital display terminal (10) automatically generates instructions to the control detection unit (3) according to the threshold set by the operator and controls the dosing mechanism to start working. The spray unit (5) rises in the vertical direction and forms a closed loop of the spray path in the horizontal direction, and comprehensively disinfects the interior of the cooling tower (8) by spraying disinfectant at multiple angles.

2. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 1, characterized in that: Two groups of spray units (5) are symmetrically provided on the top of the control box (1). The spray units (5) are in communication connection with the control detection unit (3) and include a lifting and rotating seat (51). The lifting and rotating seat (51) is provided on the top of the control box (1) and can be raised and lowered according to the height of the cooling tower (8). A first rotating mechanism (511) and a second rotating mechanism (512) are provided on the outer side thereof in order from top to bottom.

3. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 2, characterized in that: The spray unit (5) further comprises a first telescopic arm (52) and a second telescopic arm (53), both having the same structure, wherein the first telescopic arm (52) comprises: Multi-section telescopic arm; A telescopic arm lifting mechanism (523) provided between the multiple telescopic arms, which is in communication connection with the control detection unit (3); A telescopic arm top opening (521) is provided at the top of the multi-section telescopic arm, and a telescopic arm bottom opening (522) is provided at the bottom thereof. A rotary joint is provided on the telescopic arm top opening (521), and a thread is provided on the telescopic arm bottom opening (522). The thread is used to achieve a fixed connection between the first telescopic arm (52) and the first rotating mechanism (511).

4. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 3, characterized in that: The spray unit (5) further comprises a first spray head (54) and a second spray head (55), wherein the first spray head (54) is arranged at the top end of the first telescopic arm (52) via a rotary joint, and the second spray head (55) is arranged at the top end of the second telescopic arm (53) via a rotary joint.

5. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 4, characterized in that: The lifting and rotating seat (51), the first telescopic arm (52), the second telescopic arm (53), the first rotating mechanism (511) and the second rotating mechanism (512) are all hollow structures, and the cavities provided therein are connected to form a sealed channel. The sealed channel can pass through a pulling tube (56). One end of the pulling tube (56) is connected to the first nozzle (54) through a rotating joint, and the other end is connected to the water outlet of the water pump (2).

6. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 5, characterized in that: The first nozzle (54) comprises: a water surface nozzle (541) and a porous nozzle (542) arranged on the top of the water surface nozzle (541), the two having opposite spraying directions, wherein the water surface nozzle (541) is provided with a water blocker, and the porous nozzle (542) is provided with a plurality of nozzles with different spraying angles.

7. The system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to claim 6, characterized in that: The water outlet of the water pump (2) is provided with a water outlet pipe (21) and a five-way joint. One end of the water outlet pipe (21) is connected to the water outlet of the water pump (2), and the other end is connected to the main connector of the five-way joint; the secondary connector of the five-way joint is connected to one end of the pulling pipe (56).

8. A system for monitoring and automatically dosing Legionella pneumophila in a subway cooling tower according to any one of claims 1 to 7, characterized in that: A liquid level sensor is also provided in the disinfectant medicine storage cabinet (6), and is communicatively connected to the control detection unit (3).

9. A system for monitoring and automatically dosing Legionella pneumophila in a subway cooling tower according to any one of claims 1 to 7, characterized in that: The control box (1) is provided with a base connecting plate (9) at the bottom, which includes an upper base connecting plate (91) and a lower base connecting plate (92), both of which are clamped at the top and bottom of the load-bearing plate (81).

10. A method for monitoring and automatically administering Legionella pneumophila in a subway cooling tower, characterized in that: The method is implemented by using the system for monitoring and automatically administering Legionella pneumophila in a subway cooling tower according to any one of claims 1 to 9, comprising the following steps: S100: completing the setting of the disinfectant concentration threshold, the water sample detection warning index and the disinfectant reserve warning index monitoring value on the wireless digital display terminal (10); S200: When the control detection unit (3) detects that the concentration of the disinfectant reaches the minimum threshold, the wireless digital display terminal (10) automatically sends a command to the control detection unit (3) to control the dosing mechanism to perform a spray disinfection operation in the cooling tower (8); S300: The control detection unit (3) regularly sends the data of various tests on the monitored water samples and the amount of disinfectant stored to the operator via the wireless digital display terminal (10), and issues an alarm message when various indicators reach the warning value to prompt the operator to handle the abnormal situation in time.

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