Corrosion prevention system for circulating water pipeline of central air conditioner

Abstract

The utility model discloses an anti-corrosion system for a circulating water pipeline of a central air conditioner. The anti-corrosion system comprises a control system, a circulating cooling water pipeline, a supplementary water tank, a cooling tower pool, a condenser, a valve, a flow meter, an on-line conductivity monitoring device, an on-line ozone concentration monitoring device, a nitrogen and oxygen production system, an ozone generation system, integrated equipment, a thermometer and a pressure meter. According to the anti-corrosion system for the central air-conditioning circulating water pipeline, different modes are adopted in different seasons to carry out corrosion inhibition treatment on the subway air-conditioning water system pipeline, safe operation of the circulating water system is comprehensively and effectively guaranteed, the service life of the pipeline is effectively prolonged, the operation cost is saved, and the corrosion inhibition measures different from traditional corrosion inhibition measures are adopted; the device is simple in structure, high in efficiency, convenient and fast to use, intelligent adaptation is carried out according to seasons, the integrated device can intelligently switch the oxygen generation function and the nitrogen generation function by selecting different adsorption materials and integrating the different adsorption materials in one system, exhausted waste gas is effectively utilized, and high integration and intelligence are achieved.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning technology, specifically to a corrosion protection system for central air conditioning circulating water pipes. Background Technology

[0002] Because subway spaces are relatively enclosed and have high passenger flow, the central air conditioning system needs to bear a large load to meet the requirements of temperature, ventilation and humidity control. The circulating water system is an important component of the subway central air conditioning system. It uses circulating water to transfer heat from indoors to outdoors to achieve air cooling and heating. However, the pipes in the circulating water system are susceptible to corrosion.

[0003] Currently, corrosion inhibition measures for central air conditioning water systems in subway stations are lacking. The main approach is to add corrosion inhibitors to the circulating cooling water during summer operation, but the effect is not ideal. In winter, there is still a lack of effective means to prevent corrosion of circulating water pipes. In actual operation, some subway stations retain the water in the pipes without discharging it, but this poses a risk of freezing and cracking in cold regions. Moreover, due to the lack of corrosion prevention measures, the pipe corrosion is quite severe. If the water is drained, although the risk of freezing and cracking is avoided, the pipe corrosion is aggravated. Therefore, in order to solve the above problems, a corrosion prevention system for central air conditioning circulating water pipes is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a corrosion protection system for central air conditioning circulating water pipes, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a central air conditioning circulating water pipeline anti-corrosion system, comprising a control system, circulating cooling water pipelines, a makeup water tank, a cooling tower pool, a condenser, valves, a flow meter, an online conductivity monitoring device, an online ozone concentration monitoring device, a nitrogen and oxygen production system, an ozone generation system, an integrated device, a thermometer, and a pressure gauge. The control system receives start / stop signals and controls the entire system, automatically adjusting its operating status based on preset programs and monitoring data. The circulating cooling water pipelines connect the condenser, the cooling tower pool, and the makeup water tank, forming a closed loop to ensure continuous flow of circulating water within the system.

[0006] The replenishment water tank is connected to the circulating cooling water pipeline via a valve. When the circulating water is insufficient, the valve can be automatically opened to replenish water to the circulating cooling water pipeline according to the instructions of the control system.

[0007] The cooling tower pool is connected to the condenser via valves and circulating cooling water pipes, and is used to cool the circulating water flowing out of the condenser and reduce the temperature of the circulating water.

[0008] The circulating cooling water pipeline is equipped with a flow meter, which can accurately measure the flow rate of the circulating water and transmit the flow data to the control system in real time.

[0009] The circulating cooling water pipeline is equipped with an online conductivity monitoring device and an online ozone concentration monitoring device, which are used to monitor the conductivity and ozone concentration of the circulating water in real time and transmit the monitoring data to the control system.

[0010] The ozone generation system is connected to the circulating cooling water pipeline and can inject an appropriate amount of ozone into the circulating water according to the instructions of the control system to play a role in corrosion prevention.

[0011] The nitrogen and oxygen production system is connected to both the ozone generation system and the circulating cooling water pipeline. Specifically, the nitrogen and oxygen production system is an oxygen and nitrogen generator that can inject an appropriate amount of nitrogen into the circulating water according to the instructions of the control system to enhance the anti-corrosion effect; or provide oxygen to the ozone generation system as the gas source for ozone production; or serve as the gas source for the electrical control cabinet and power supply cabinet in the ozone generation system to alleviate the condensation process.

[0012] The integrated equipment includes an ozone water dissolution system and a gas mixing system, which are used to fully dissolve ozone and nitrogen in circulating water, ensuring that the anti-corrosion substances are evenly distributed in the circulating water and improving the anti-corrosion efficiency.

[0013] The thermometer is used to monitor the water temperature in the circulating cooling water pipeline in real time and transmit the temperature data to the control system so that the control system can adjust the anti-corrosion measures according to the water temperature. The pressure gauge is used to monitor the pressure in the circulating cooling water pipeline in real time and transmit the pressure data to the control system. This is used to ensure the monitoring of the anti-corrosion effect and to ensure that the system operates within a safe pressure range.

[0014] Preferably, the control system can automatically adjust the injection volume of the ozone generation system and the nitrogen and oxygen production system based on the monitoring data of the online conductivity monitoring device and the online ozone concentration monitoring device, so as to maintain the concentration of ozone and nitrogen in the circulating water, ensuring the anti-corrosion effect while avoiding waste.

[0015] Preferably, the valve is an automatic control valve, which can be opened and closed according to the instructions of the control system to realize the control of the circulating water flow and the connection between the makeup water tank, the cooling tower pool and the circulating cooling water pipeline.

[0016] Preferably, the flow meter is a high-precision flow meter, which can accurately measure the flow rate of circulating water and transmit the flow data to the control system in the form of digital signals so that the control system can perform data analysis and decision-making.

[0017] Preferably, the online conductivity monitoring device and the online ozone concentration monitoring device have high sensitivity and accuracy, and can monitor the conductivity and ozone concentration of circulating water in real time and transmit the monitoring data to the control system in a stable signal to ensure that the control system can adjust the anti-corrosion measures in a timely manner.

[0018] Preferably, the ozone generation system and the nitrogen and oxygen production system can stably inject ozone and nitrogen into the circulating water, and the injection amount can be precisely adjusted according to the instructions of the control system to ensure the anti-corrosion effect while avoiding adverse effects on the circulating water system.

[0019] Preferably, the integrated device can efficiently dissolve ozone and nitrogen in circulating water. Through the optimized design of the gas mixing system and ozone water dissolution system, it ensures that the anti-corrosion substances are evenly distributed in the circulating water, thereby improving the anti-corrosion efficiency and the stability of the system.

[0020] Preferably, the circulating cooling water pipe is made of corrosion-resistant material, and the connection between the various components of the entire anti-corrosion system is tight and reliable, ensuring that the system will not leak or be damaged during long-term operation, thus guaranteeing the stability and reliability of the anti-corrosion system.

[0021] This utility model has the following beneficial effects:

[0022] This central air conditioning circulating water pipeline anti-corrosion system employs an ozone corrosion inhibition process in summer, injecting an appropriate amount of ozone into the circulating water to effectively prevent pipeline corrosion. Simultaneously, the integrated equipment fully dissolves ozone and nitrogen in the circulating water, ensuring uniform distribution of the anti-corrosion material, improving anti-corrosion efficiency, and thus extending the pipeline's service life. In winter, an oxygen and nitrogen generator produces nitrogen to purge the circulating water pipeline, continuously filling it with nitrogen to isolate oxygen, reducing the risk of pipeline corrosion and further extending the pipeline's service life. Different anti-corrosion methods are used according to seasonal changes: ozone corrosion inhibition in summer and nitrogen purging corrosion inhibition in winter, comprehensively and effectively ensuring the safe operation of the circulating water system in different seasons. The integrated equipment can intelligently switch between oxygen and nitrogen generation functions, intelligently adapting to seasonal needs and meeting the different requirements for anti-corrosion measures in different seasons.

[0023] This central air conditioning circulating water pipe anti-corrosion system, through the use of corrosion-resistant materials in the circulating cooling water pipes and tight and reliable connections, ensures that the system will not leak or be damaged during long-term operation, thus improving the system's safety and reliability. The control system can automatically adjust the injection volume of the ozone generation system and the nitrogen and oxygen production system based on monitoring data, avoiding the waste of anti-corrosion materials and saving operating costs. It can intelligently select oxygen or nitrogen production functions, rationally utilize resources according to different needs, improve energy efficiency, and reduce operating costs. At the same time, the exhaust gas is effectively utilized, reducing energy waste. The multi-parameter water quality monitoring system automatically controls water replenishment and drainage based on the concentration ratio, keeping the concentration ratio within an appropriate range, reducing water waste and lowering operating costs.

[0024] This central air conditioning circulating water pipeline anti-corrosion system, in summary, through the interaction of the above-mentioned multiple effects, adopts different methods for corrosion inhibition treatment of subway air conditioning water system pipelines in different seasons. This not only comprehensively and effectively ensures the safe operation of the circulating water system, but also effectively extends the service life of the pipelines and saves operating costs. It adopts corrosion inhibition measures that are different from traditional ones, are efficient and convenient, and can be intelligently adapted to the seasons. It innovatively solves the corrosion problem of subway air conditioning water systems. The integrated equipment selects different adsorption materials and integrates them into one system. It can intelligently switch between oxygen generation and nitrogen generation functions, and effectively utilize the exhaust gas. It is highly integrated and intelligent. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a flowchart illustrating the present invention. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0028] In summer, when the central air conditioning system is running and water is circulating in the pipes, the ozone corrosion inhibition process is used. The oxygen and nitrogen generators are started, and the molecular sieve adsorbs nitrogen. The oxygen that passes through is collected, pressurized, and used as the gas source for the ozone generation system. At the same time, the dry nitrogen gas desorbed by the molecular sieve is blown into the ozone generation equipment to reduce the humidity inside the equipment. The system takes a small amount of water from the user's circulating cooling water pipes and mixes it with the ozone gas produced by the integrated equipment in the gas-water mass transfer system to form ozone water.

[0029] Ozone water is injected into the circulating cooling water pipes to inhibit corrosion. At the same time, a multi-parameter water quality monitoring system monitors the conductivity and ozone concentration in the water in real time. When the concentration ratio is less than 3, no water is drained, and water is replenished according to the liquid level control. At this time, the ozone injection amount in the water is controlled at about 0.01 mg / L. As the concentration ratio increases to 5, automatic water replenishment and drainage are activated to ensure that the concentration ratio does not exceed 8, and the ozone injection amount is added according to the target value of 0.05 mg / L ozone concentration in the water. The injection amount adjustment control range is the lower limit of 0.01 mg / L to the upper limit of 0.1 mg / L.

[0030] In winter, when the temperature drops below freezing and the central air conditioning system is shut down, intelligent monitoring and drainage and nitrogen purging corrosion inhibition processes are activated to prevent pipes from freezing and cracking. When the circulating pump is shut down for more than one month and the outdoor circulating water temperature is below or equal to 0°C, the control system opens the circulating cooling water drain valve and vent valve to release water.

[0031] When the flow rate approaches 0 and does not rise for 5000 minutes, nitrogen production is automatically started and injected into the circulating water pipeline for purging. According to the internal program, after the purging time exceeds 48 hours and the humidity in the pipeline is less than 30%, the control system automatically closes the valves at both ends of the pipeline and continues to fill with nitrogen until the pressure in the pipeline reaches 2 bar. The nitrogen system then stops. When the pressure in the pipeline decreases to 1 bar, nitrogen is restarted to replenish to 2 bar, thus achieving nitrogen corrosion protection.

[0032] The integrated equipment automatically starts and stops the ozone corrosion inhibition process based on the collected pump start / stop and flow signals. When the circulating cooling water system stops operating, the automatic control stops the ozone injection at the same time. When the circulating pump starts, ozone injection continues. Based on the real-time monitoring data of the pump start / stop and outdoor water temperature, the integrated equipment automatically starts the system drainage and nitrogen purging corrosion inhibition processes. Based on the pump start / stop and flow signals, the integrated equipment intelligently selects oxygen or nitrogen generation. Both oxygen and nitrogen generation use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen generation, and oxygen is discharged during nitrogen generation. During oxygen generation, the discharged nitrogen is collected and introduced into the ozone generator to dry the equipment and prevent condensation from damaging the equipment. The oxygen discharged during nitrogen generation can be discharged into the indoor fresh air system nearby or discharged locally.

[0033] After testing, this embodiment effectively prevents corrosion of circulating water pipes and extends their service life. The intelligent control system can automatically adjust anti-corrosion measures based on real-time monitoring data, improving the reliability and stability of the system. The combination of ozone corrosion inhibition and nitrogen purging corrosion inhibition processes provides effective anti-corrosion protection in different seasons. The use of oxygen and nitrogen generators reduces the system's operating costs and also reduces the impact on the environment. In summary, this central air conditioning circulating water pipe anti-corrosion system has achieved good results in practical applications and provides a strong guarantee for the stable operation of the central air conditioning system. Example 1

[0034] In summer, when the central air conditioning system is in operation and water is circulating in the pipes, a corrosion prevention process combining ozone corrosion inhibition and biological control is adopted. The ozone generation system is activated to produce a high concentration of ozone and distribute the ozone evenly in the circulating cooling water pipes. The ozone can oxidize organic matter and microorganisms in the circulating water, reducing the generation of dirt and corrosion.

[0035] Meanwhile, biological inhibitors are added to the makeup water tank and cooling tower pool to inhibit the growth and reproduction of microorganisms in the circulating water. The biological inhibitors can work synergistically with ozone to improve the anti-corrosion effect. The multi-parameter water quality monitoring system monitors parameters such as conductivity, ozone concentration, pH value, and microbial content in the water in real time and transmits the data to the control system. The control system automatically adjusts the dosage of ozone generation system and biological inhibitors based on the monitoring data to ensure the anti-corrosion effect while avoiding waste. In winter, when the temperature is below freezing and the central air conditioning system is shut down, intelligent insulation and nitrogen purging corrosion inhibition processes are activated to prevent pipes from freezing and cracking.

[0036] Intelligent insulation material is installed on the outer layer of the circulating cooling water pipe. This material can automatically adjust its insulation performance according to the water temperature inside the pipe, ensuring that the water temperature inside the pipe does not drop below the freezing point.

[0037] Simultaneously, nitrogen generated by the nitrogen and oxygen production system is used to purge the circulating water pipeline. During the purging process, the control system monitors the humidity and pressure inside the pipeline in real time and automatically adjusts the nitrogen flow rate and purging time based on the monitoring data to ensure that the humidity inside the pipeline is reduced to a safe range. When the humidity inside the pipeline reaches the required level, the nitrogen purging system is shut off, and nitrogen is continued to be introduced until the pressure inside the pipeline reaches a certain value. Then, the valve is closed to maintain the nitrogen pressure inside the pipeline, thereby achieving nitrogen corrosion prevention.

[0038] The integrated equipment automatically starts and stops the ozone corrosion inhibition process based on the collected pump start / stop and flow signals. When the circulating cooling water system stops operating, the automatic control simultaneously stops the ozone injection; when the circulating pump starts, ozone injection continues. Based on the real-time monitoring data of the pump start / stop and outdoor water temperature, the integrated equipment automatically starts the system drainage and nitrogen purging corrosion inhibition processes. Based on the pump start / stop and flow signals, the integrated equipment intelligently selects oxygen or nitrogen generation. Both oxygen and nitrogen generation use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen generation, and oxygen is discharged during nitrogen generation. During oxygen generation, the discharged nitrogen is collected and introduced into the ozone generator to dry the equipment and prevent condensation from damaging the equipment. The oxygen discharged during nitrogen generation can be discharged into the indoor fresh air system nearby or discharged locally.

[0039] After testing, this embodiment, employing advanced materials and technologies, improves the system's corrosion resistance and reliability, extends the pipeline's service life, and allows the intelligent control system to automatically adjust anti-corrosion measures based on real-time monitoring data, enhancing the anti-corrosion effect and system stability. The combination of ozone corrosion inhibition and biological control, along with intelligent insulation and nitrogen purging corrosion inhibition processes, provides effective anti-corrosion protection in different seasons, reducing maintenance costs. The application of a distributed control system and wireless sensor network technology enables remote monitoring and management, improving the system's intelligence level and management efficiency. In summary, this innovative embodiment provides an efficient, intelligent, and environmentally friendly solution for the corrosion protection of central air conditioning circulating water pipelines, with broad application prospects.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion protection system for central air conditioning circulating water pipes, characterized in that: The system includes a control system, circulating cooling water pipes, a makeup water tank, a cooling tower pool, a condenser, valves, flow meters, an online conductivity monitoring device, an online ozone concentration monitoring device, a nitrogen and oxygen production system, an ozone generation system, an integrated device, thermometers, and pressure gauges. Its features include: the control system receiving start / stop signals and controlling the entire system, automatically adjusting the system's operating state according to a preset program and monitoring data; and the circulating cooling water pipes connecting the condenser, cooling tower pool, and makeup water tank to form a closed loop, ensuring continuous flow of circulating water within the system. The replenishment water tank is connected to the circulating cooling water pipeline via a valve. When the circulating water is insufficient, the valve can be automatically opened to replenish water to the circulating cooling water pipeline according to the instructions of the control system. The cooling tower pool is connected to the condenser via valves and circulating cooling water pipes, and is used to cool the circulating water flowing out of the condenser and reduce the temperature of the circulating water. The circulating cooling water pipeline is equipped with a flow meter, which can accurately measure the flow rate of the circulating water and transmit the flow data to the control system in real time. The circulating cooling water pipeline is equipped with an online conductivity monitoring device and an online ozone concentration monitoring device, which are used to monitor the conductivity and ozone concentration of the circulating water in real time and transmit the monitoring data to the control system. The ozone generation system is connected to the circulating cooling water pipeline and can inject an appropriate amount of ozone into the circulating water according to the instructions of the control system to play a role in corrosion prevention. The nitrogen and oxygen production system is connected to both the ozone generation system and the circulating cooling water pipeline. Specifically, the nitrogen and oxygen production system is an oxygen and nitrogen generator that can inject an appropriate amount of nitrogen into the circulating water according to the instructions of the control system to enhance the anti-corrosion effect; or provide oxygen to the ozone generation system as the gas source for ozone production; or serve as the gas source for the electrical control cabinet and power supply cabinet in the ozone generation system to alleviate the condensation process. The integrated equipment includes an ozone water dissolution system and a gas mixing system, which are used to fully dissolve ozone and nitrogen in circulating water, ensuring that the anti-corrosion substances are evenly distributed in the circulating water and improving the anti-corrosion efficiency. The thermometer is used to monitor the water temperature in the circulating cooling water pipeline in real time and transmit the temperature data to the control system so that the control system can adjust the anti-corrosion measures according to the water temperature. The pressure gauge is used to monitor the pressure in the circulating cooling water pipeline in real time and transmit the pressure data to the control system. This is used to ensure the monitoring of the anti-corrosion effect and to ensure that the system operates within a safe pressure range.

2. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The control system can automatically adjust the injection volume of the ozone generation system and the nitrogen and oxygen production system based on the monitoring data of the online conductivity monitoring device and the online ozone concentration monitoring device, so as to maintain the concentration of ozone and nitrogen in the circulating water, ensuring the anti-corrosion effect while avoiding waste.

3. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The valve is an automatic control valve that can be opened and closed according to the instructions of the control system, thereby realizing the control of the circulating water flow and the connection between the makeup water tank, cooling tower pool and circulating cooling water pipeline.

4. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The flow meter is a high-precision flow meter that can accurately measure the flow rate of circulating water and transmit the flow data to the control system in the form of digital signals so that the control system can perform data analysis and decision-making.

5. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The online conductivity monitoring device and the online ozone concentration monitoring device have high sensitivity and accuracy, and can monitor the conductivity and ozone concentration of circulating water in real time and transmit the monitoring data to the control system in a stable signal to ensure that the control system can adjust the anti-corrosion measures in a timely manner.

6. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The ozone generation system and the nitrogen and oxygen production system can stably inject ozone and nitrogen into the circulating water. The injection amount can be precisely adjusted according to the instructions of the control system, ensuring the anti-corrosion effect while avoiding adverse effects on the circulating water system.

7. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The integrated equipment can efficiently dissolve ozone and nitrogen in circulating water. Through the optimized design of the gas mixing system and ozone water dissolution system, it ensures that the anti-corrosion substances are evenly distributed in the circulating water, thereby improving the anti-corrosion efficiency and system stability.

8. The anti-corrosion system for central air conditioning circulating water pipes according to claim 1, characterized in that: The circulating cooling water pipeline is made of corrosion-resistant materials, and the connections between all components of the entire anti-corrosion system are tight and reliable, ensuring that the system will not leak or be damaged during long-term operation, thus guaranteeing the stability and reliability of the anti-corrosion system.

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