Corrosion prevention system and method for circulating water pipeline of central air conditioner

Abstract

The invention discloses an anti-corrosion system and method for a circulating water pipeline of a central air conditioner, and particularly relates to the technical field of central air conditioners. Comprising 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, integrated equipment, a thermometer and a pressure meter. Different modes are adopted in different seasons for corrosion inhibition treatment of the subway air conditioner water system pipeline, safe operation of a circulating water system is guaranteed, the service life of the pipeline is effectively prolonged, the operation cost is saved, corrosion inhibition measures different from traditional corrosion inhibition measures are adopted, high efficiency and convenience are achieved, intelligent adaptation is conducted according to the seasons, and the application range is wide. The problem of corrosion of a subway air-conditioning water system is solved, the integrated equipment selects different adsorption materials and integrates the different adsorption materials in one system, the oxygen generation function and the nitrogen generation function can be intelligently switched, exhausted waste gas is effectively utilized, and high integration and intelligence are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of central air conditioners, and more specifically, to a central air conditioner circulating water pipeline anti-corrosion system and method thereof. Background Art

[0002] Since the subway space is relatively closed and has a large flow of people, 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 part of the subway central air-conditioning. It transfers heat from indoors to outdoors through circulating water to achieve air cooling and heating. However, the pipes in the circulating water system are susceptible to corrosion.

[0003] At present, there is a lack of corrosion control measures for the central air-conditioning water system of subway stations. The main method is to add corrosion inhibitors to the circulating cooling water during summer operation, but the effect is not ideal. In winter, there has been a lack of effective means for the anti-corrosion of circulating water pipes. In actual operation, some subway stations retain water in the pipes and do not discharge it, but there is a risk of freezing and cracking in cold areas, and due to the lack of anti-corrosion measures, the pipeline corrosion is more serious. If the water is emptied, although the risk of freezing and cracking is avoided, the corrosion of the pipeline is aggravated. Therefore, in order to systematically solve the above problems, a central air-conditioning circulating water pipeline anti-corrosion system and method are proposed. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a central air-conditioning circulating water pipeline anti-corrosion system and method thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a central air-conditioning circulating water pipeline anti-corrosion system, comprising a control system, a circulating cooling water pipeline, a supplementary water tank, a cooling tower pool, a condenser, a valve, a flow meter, an online conductivity monitoring device, an online ozone concentration monitoring device, a nitrogen and oxygen production system, an integrated device, a thermometer and a pressure gauge, wherein the control system is used to receive a start-stop signal and control the entire system, and can automatically adjust the operating state of the system according to a preset program and monitoring data; the circulating cooling water pipeline is connected to the condenser, the cooling tower pool and the supplementary water tank to form a closed circulation loop to ensure that the circulating water flows continuously in the system; The replenishing water tank is connected to the circulating cooling water pipeline through a valve. When the circulating water is insufficient, the valve can be automatically opened according to the instruction of the control system to replenish water to the circulating cooling water pipeline; The cooling tower pool is connected to the condenser through a valve and a circulating cooling water pipeline, 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 provided 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, respectively, and transmit the monitoring data to the control system; The ozone generating 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 an anti-corrosion role; The nitrogen and oxygen production system is connected to the ozone generation system and the circulating cooling water pipeline. The nitrogen and oxygen production system is specifically an oxygen and nitrogen generator, which 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; The integrated equipment includes an ozone water dissolution system and a gas mixing system, which are used to fully dissolve ozone and nitrogen in the circulating water, ensure that the anti-corrosion substances are evenly distributed in the circulating water, and improve 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. On the one hand, it is used to ensure the monitoring of the anti-corrosion effect; on the other hand, it ensures that the system operates within a safe pressure range.

[0006] Preferably, the control system can automatically adjust the injection amount of the ozone generation system and the nitrogen and oxygen production systems according to the monitoring data of the online conductivity monitoring device and the online ozone concentration monitoring device, so as to keep the concentration of ozone and nitrogen in the circulating water within an appropriate range, thereby ensuring the anti-corrosion effect while avoiding waste.

[0007] Preferably, the valve is an automatic control valve, which can be opened and closed according to the instructions of the control system to achieve control of the circulating water flow and the connection between the supplementary water tank, the cooling tower pool and the circulating cooling water pipeline.

[0008] Preferably, 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 a digital signal so that the control system can perform data analysis and decision-making.

[0009] Preferably, the online conductivity monitoring device and the online ozone concentration monitoring device have high sensitivity and accuracy, can accurately monitor the conductivity and ozone concentration of circulating water in real time, and transmit the monitoring data to the control system in the form of stable signals, ensuring that the control system can adjust the anti-corrosion measures in time.

[0010] 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 accurately adjusted according to the instructions of the control system to ensure the anti-corrosion effect while avoiding adverse effects on the circulating water system.

[0011] Preferably, the integrated equipment can efficiently dissolve ozone and nitrogen in circulating water, and through the optimized design of the gas mixing system and the ozone water dissolution system, ensure that the anti-corrosion substances are evenly distributed in the circulating water, thereby improving the anti-corrosion efficiency and the stability of the system.

[0012] Preferably, the circulating cooling water pipeline is made of corrosion-resistant material, and the connections between the various 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, thereby ensuring the stability and reliability of the anti-corrosion system.

[0013] A method for anti-corrosion of central air-conditioning circulating water pipelines, S1: Equipment preparation, including control system, circulating cooling water pipeline, make-up water tank, cooling tower pool, condenser, valve, flow meter, conductivity online monitoring device, ozone concentration online monitoring device and central air conditioning circulating water pipeline anti-corrosion system composed of integrated equipment with oxygen and nitrogen generator; S2: Anti-corrosion in the summer air-conditioning season. When water circulates in the pipeline, the ozone corrosion inhibition process is used. The oxygen and nitrogen generators in the integrated equipment adopt the principle of pressure swing adsorption. The molecular sieve adsorbs nitrogen. The oxygen that passes through is collected and pressurized as the gas source of the ozone generation system. The dry nitrogen analyzed after molecular sieve adsorption is blown into the power cabinet and electric control cabinet of the ozone generation equipment to prevent the condensation of condensed water. The system takes 2%-10% of the circulating water collected by the flow meter from the user's circulating cooling water pipeline, mixes it with the ozone gas produced by the integrated equipment in the gas-water mass transfer system to form ozone water, and then injects it into the circulating cooling water pipeline to achieve corrosion inhibition; S3: Nitrogen anti-corrosion, using a multi-parameter water quality monitoring system to monitor the conductivity and ozone concentration in the water in real time. By monitoring the conductivity of the supplementary water COND1 and the conductivity of the circulating water COND2, the concentration multiple is calculated. When the concentration multiple is less than 3, no water is drained and only water is replenished according to the liquid level control. At this time, the ozone injection amount in the water is controlled at about 0.01mg / L; as the concentration multiple increases to 3-8, automatic replenishment and drainage are turned on to make the concentration multiple not exceed 8, and the ozone injection amount is added according to the target value of 0.05mg / L of ozone concentration in the water, and the injection amount adjustment control range is the lower limit 0.01mg / L-upper limit 0.1mg / L; S4: Anti-corrosion during the winter air conditioning shutdown season. When the temperature is below freezing, the pipeline is prevented from freezing and cracking. The intelligent monitoring and drainage is started. At the same time, the oxygen and nitrogen generator is used to generate nitrogen to purge the circulating water pipeline to reduce the humidity of the pipeline. Nitrogen is continuously filled to isolate oxygen and inhibit corrosion. When the circulation pump is stopped for more than 1 month and the outdoor circulating water temperature is lower than or equal to 0°C, the circulating cooling water drain valve and the vent valve are opened to drain water. When the flow data tends to 0 and does not rise for x minutes, nitrogen production is automatically started and injected into the circulating water pipeline for purge. According to the internal program, when the purge time is greater than a hour and the humidity in the pipeline is less than b, the valves at both ends of the pipeline are automatically closed through the control system, and nitrogen is continuously filled until the pressure in the pipeline reaches 2 bar. The nitrogen system stops. When the pressure in the pipeline decays to 1 bar, nitrogen is started again to fill to 2 bar to achieve nitrogen anti-corrosion. S5: Intelligent control of oxygen and nitrogen production. The integrated equipment automatically starts and shuts down the ozone corrosion inhibition process according to the collected circulation pump start and stop and flow signals. When the circulating cooling water system stops running, the automatic control stops the injection of ozone at the same time. When the circulation pump starts, the ozone injection continues. According to the real-time monitoring data of the circulation pump start and stop and the outdoor water temperature, the system drainage and nitrogen purge corrosion inhibition process are automatically started. The integrated equipment intelligently selects oxygen or nitrogen production according to the circulation pump start and stop and flow signals.

[0014] Preferably, the dry nitrogen analyzed after the molecular sieve adsorption is blown into the ozone generating equipment to reduce the humidity inside the equipment and prevent the risk of condensation short circuit. The method for calculating the concentration multiple is (COND2 / COND1). The values ​​of a, b, and x in S4 are different according to different volume water systems and are set during on-site commissioning. In S5, both oxygen production and nitrogen production use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen production, and oxygen is discharged during nitrogen production. During oxygen production, the discharged nitrogen is collected and introduced into the ozone generator, and the equipment is dried to prevent condensed water from condensing and damaging the equipment. The oxygen discharged during nitrogen production can be discharged into the indoor fresh air system nearby or discharged on site.

[0015] Technical effects and advantages of the present invention: By adopting the ozone corrosion inhibition process in summer and injecting an appropriate amount of ozone into the circulating water, pipeline corrosion can be effectively prevented. At the same time, the integrated equipment fully dissolves ozone and nitrogen in the circulating water to ensure that the anti-corrosion substances are evenly distributed, improve the anti-corrosion efficiency, and thus extend the service life of the pipeline. In winter, the oxygen and nitrogen generators are used to generate nitrogen to purge the circulating water pipeline. Continuous nitrogen filling isolates oxygen, reduces the risk of pipeline corrosion, and further extends the service life of the pipeline. Different anti-corrosion methods are adopted according to seasonal changes. The ozone corrosion inhibition process is used in summer and the nitrogen purge corrosion inhibition process is used in winter. The safe operation of the circulating water system in different seasons is fully and effectively guaranteed. The integrated equipment can intelligently switch the oxygen and nitrogen production functions, and intelligently adapt according to seasonal needs to meet the different requirements for anti-corrosion measures in different seasons. By using circulating cooling water pipes made of corrosion-resistant materials and tight and reliable connections, it is ensured that the system will not leak or be damaged during long-term operation, thus improving the safety and reliability of the system. The control system can automatically adjust the injection volume of the ozone generation system and the nitrogen and oxygen production systems according to the monitoring data, thus avoiding the waste of anti-corrosion substances and saving operating costs. It can intelligently select the oxygen or nitrogen production function, rationally utilize resources according to different needs, improve energy utilization 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 the replenishment and drainage according to the concentration multiple, so that the concentration multiple is kept within the appropriate range, thus reducing the waste of water resources and reducing operating costs. In summary, through the mutual influence of the above-mentioned multiple effects, different methods are used in different seasons to carry out corrosion inhibition treatment of subway air-conditioning water system pipes, which not only comprehensively and effectively guarantees the safe operation of the circulating water system, but also effectively extends the service life of the pipes and saves operating costs. Different corrosion inhibition measures are adopted, which are efficient and convenient, and intelligently adapted according to the season, innovatively solving the corrosion problem of subway air-conditioning water systems. The integrated equipment selects different adsorption materials and integrates them into a system. It can intelligently switch the oxygen and nitrogen production functions, and effectively utilize the discharged exhaust gas. It is highly integrated and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the method flow structure of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] In summer, the central air conditioning system is running, and water circulates in the pipes. At this time, the ozone corrosion inhibition process is adopted, the oxygen and nitrogen generators are started, the molecular sieves adsorb nitrogen, and the oxygen passing through is collected and pressurized as the gas source of the ozone generation system. At the same time, the dry nitrogen analyzed after molecular sieve adsorption 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 pipeline and mixes it with the ozone gas produced by the integrated equipment in the gas-water mass transfer system to form ozone water; Ozone water is injected into the circulating cooling water pipeline to achieve corrosion inhibition. At the same time, the 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 only 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 replenishment and drainage are turned on to make the concentration ratio not exceed 8, and the ozone injection amount is added according to the target value of 0.05 mg / L of ozone concentration in the water. The injection amount adjustment control range is 0.01 mg / L at the lower limit and 0.1 mg / L at the upper limit. In winter, when the temperature is below freezing, the central air conditioning system stops operating. To prevent pipes from freezing and cracking, the intelligent monitoring drainage and nitrogen purge corrosion inhibition process is started. When the circulation pump is stopped 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 drainage valve and vent valve to drain water. When the flow data tends to 0 and has not risen for 5000 minutes, nitrogen production is automatically started and injected into the circulating water pipeline for purging. According to the internal program, when the purging time is greater than 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 nitrogen until the pressure in the pipeline reaches 2 bar. The nitrogen system stops. When the pressure in the pipeline decays to 1 bar, nitrogen is started again to replenish to 2 bar to achieve nitrogen corrosion protection.

[0020] The integrated equipment automatically starts and shuts down the ozone corrosion inhibition process according to the collected circulation pump start and stop and flow signals. When the circulating cooling water system stops running, the automatic control stops the injection of ozone at the same time. When the circulation pump starts, ozone continues to be injected. According to the real-time monitoring data of the circulation pump start and stop and the outdoor water temperature, the system drainage and nitrogen purge corrosion inhibition process are automatically started. The integrated equipment intelligently selects oxygen production or nitrogen production according to the circulation pump start and stop and flow signals. Both oxygen production and nitrogen production use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen production, and oxygen is discharged during nitrogen production. During oxygen production, the discharged nitrogen is collected and introduced into the ozone generator to dry the equipment to prevent condensation and damage to the equipment. The oxygen discharged during nitrogen production can be discharged into the indoor fresh air system nearby or discharged on site. After testing, this embodiment effectively prevents the corrosion of the circulating water pipeline and prolongs the service life of the pipeline. The intelligent control system can automatically adjust the anti-corrosion measures according to the real-time monitoring data, improve the reliability and stability of the system, and adopts a combination of ozone corrosion inhibition technology and nitrogen purge corrosion inhibition technology to provide effective anti-corrosion protection in different seasons. The use of oxygen and nitrogen generators reduces the operating cost of the system and also reduces the impact on the environment. In short, the central air-conditioning circulating water pipeline 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

[0021] In summer, the central air conditioning system is running and water circulates in the pipes. At this time, an anti-corrosion process combining ozone corrosion inhibition and biological control is adopted. The ozone generation system is started to produce high-concentration ozone and evenly distribute the ozone to the circulating cooling water pipes. Ozone can oxidize organic matter and microorganisms in the circulating water and reduce the generation of dirt and corrosion. At the same time, biological inhibitors are added to the supplementary 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 the conductivity, ozone concentration, pH value, microbial content and other parameters in the water in real time, and transmits the data to the control system. The control system automatically adjusts the ozone generation system and the amount of biological inhibitors added according to the monitoring data to ensure the anti-corrosion effect while avoiding waste. In winter, when the temperature is below freezing, the central air-conditioning system is shut down. In order to prevent the pipes from freezing and cracking, the intelligent insulation and nitrogen purge corrosion inhibition process is started; Install intelligent insulation materials on the outer layer of the circulating cooling water pipeline, which can automatically adjust the insulation performance according to the water temperature in the pipeline to ensure that the water temperature in the pipeline will not fall below the freezing point; At the same time, the circulating water pipeline is purged with nitrogen generated by the nitrogen and oxygen production system. During the purging process, the control system monitors the humidity and pressure in the pipeline in real time, and automatically adjusts the nitrogen flow and purging time according to the monitoring data to ensure that the humidity in the pipeline is reduced to a safe range. When the humidity in the pipeline reaches the requirement, the nitrogen purging system is turned off, and nitrogen is continued to be filled until the pressure in the pipeline reaches a certain value, and then the valve is closed to maintain the nitrogen pressure in the pipeline to achieve nitrogen corrosion protection; The integrated equipment automatically starts and shuts down the ozone corrosion inhibition process according to the collected circulation pump start and stop and flow signals. When the circulating cooling water system stops running, the automatic control stops the injection of ozone at the same time; when the circulation pump starts, ozone continues to be injected. According to the real-time monitoring data of the circulation pump start and stop and the outdoor water temperature, the system drainage and nitrogen purge corrosion inhibition process are automatically started. The integrated equipment intelligently selects oxygen production or nitrogen production according to the circulation pump start and stop and flow signals. Both oxygen production and nitrogen production use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen production, and oxygen is discharged during nitrogen production. During oxygen production, the discharged nitrogen is collected and introduced into the ozone generator to dry the equipment to prevent condensation and damage to the equipment. The oxygen discharged during nitrogen production can be discharged into the indoor fresh air system nearby or discharged on site.

[0022] After testing, this embodiment adopts advanced materials and technologies to improve the corrosion resistance and reliability of the system and extend the service life of the pipeline. The intelligent control system can automatically adjust the anti-corrosion measures according to the real-time monitoring data, thereby improving the anti-corrosion effect and the stability of the system. The anti-corrosion process that combines ozone corrosion inhibition and biological control, as well as the intelligent insulation and nitrogen purge corrosion inhibition process, can provide effective anti-corrosion protection in different seasons and reduce maintenance costs. The application of distributed control systems and wireless sensor network technologies realizes remote monitoring and management, and improves the intelligence level and management efficiency of the system. In short, this innovative embodiment provides an efficient, intelligent and environmentally friendly solution for the anti-corrosion of central air-conditioning circulating water pipelines, and has broad application prospects.

[0023] Finally, it should be noted that the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: 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, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A central air conditioning circulating water pipeline anticorrosion system, including a control system, a circulating cooling water pipeline, a supplementary water tank, a cooling tower pool, a condenser, a valve, a flow meter, an online conductivity monitoring device, an online ozone concentration monitoring device, a nitrogen and oxygen production system, an integrated device, a thermometer and a pressure gauge, characterized in that: The control system is used to receive start and stop signals and control the entire system, and can automatically adjust the operating state of the system according to the preset program and monitoring data; the circulating cooling water pipeline connects the condenser, the cooling tower pool and the supplementary water tank to form a closed circulation loop to ensure that the circulating water flows continuously in the system; The replenishing water tank is connected to the circulating cooling water pipeline through a valve. When the circulating water is insufficient, the valve can be automatically opened according to the instruction of the control system to replenish water to the circulating cooling water pipeline; The cooling tower pool is connected to the condenser through a valve and a circulating cooling water pipeline, 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 provided 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, respectively, and transmit the monitoring data to the control system; The ozone generating 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 an anti-corrosion role; The nitrogen and oxygen production system is connected to the ozone generation system and the circulating cooling water pipeline. The nitrogen and oxygen production system is specifically an oxygen and nitrogen generator, which 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 a gas source for ozone production; As the gas source for the heavy electrical control cabinet and power cabinet of 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 the circulating water, ensure that the anti-corrosion substances are evenly distributed in the circulating water, and improve 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. On the one hand, it is used to ensure the monitoring of the anti-corrosion effect; on the other hand, it ensures that the system operates within a safe pressure range.

2. The central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is characterized in that: The control system can automatically adjust the injection amount of the ozone generation system and the nitrogen and oxygen production systems according to the monitoring data of the online conductivity monitoring device and the online ozone concentration monitoring device, so as to keep the concentration of ozone and nitrogen in the circulating water within a suitable range, thereby ensuring the anti-corrosion effect and avoiding waste.

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

4. The central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is 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 central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is characterized in that: The conductivity online monitoring device and the ozone concentration online monitoring device have high sensitivity and accuracy, can accurately monitor the conductivity and ozone concentration of circulating water in real time, and transmit the monitoring data to the control system in the form of stable signals, ensuring that the control system can adjust the anti-corrosion measures in time.

6. The central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is characterized in that: 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 accurately adjusted according to the instructions of the control system to ensure the anti-corrosion effect while avoiding adverse effects on the circulating water system.

7. The central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is characterized by: The integrated equipment can efficiently dissolve ozone and nitrogen in circulating water, and through the optimized gas mixing system and ozone water dissolution system design, ensure that the anti-corrosion substances are evenly distributed in the circulating water, thereby improving the anti-corrosion efficiency and system stability.

8. The central air-conditioning circulating water pipeline anti-corrosion system according to claim 1 is characterized by: The circulating cooling water pipeline is made of corrosion-resistant materials, and the connections between the various 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, thereby ensuring the stability and reliability of the anti-corrosion system.

9. A method for anti-corrosion of central air-conditioning circulating water pipelines, characterized in that: The central air-conditioning circulating water pipeline anti-corrosion system according to any one of claims 1 to 8 is used for anti-corrosion: S1: Equipment preparation, including control system, circulating cooling water pipeline, make-up water tank, cooling tower pool, condenser, valve, flow meter, conductivity online monitoring device, ozone concentration online monitoring device and central air conditioning circulating water pipeline anti-corrosion system composed of integrated equipment with oxygen and nitrogen generator; S2: Anti-corrosion in the summer air-conditioning season. When water circulates in the pipeline, the ozone corrosion inhibition process is used. The oxygen and nitrogen generators in the integrated equipment adopt the principle of pressure swing adsorption. The molecular sieve adsorbs nitrogen. The oxygen that passes through is collected and pressurized as the gas source of the ozone generation system. The dry nitrogen analyzed after molecular sieve adsorption is blown into the power cabinet and electric control cabinet of the ozone generation equipment to prevent the condensation of condensed water. The system takes 2%-10% of the circulating water collected by the flow meter from the user's circulating cooling water pipeline, mixes it with the ozone gas produced by the integrated equipment in the gas-water mass transfer system to form ozone water, and then injects it into the circulating cooling water pipeline to achieve corrosion inhibition; S3: Nitrogen anti-corrosion, using a multi-parameter water quality monitoring system to monitor the conductivity and ozone concentration in the water in real time. By monitoring the conductivity of the supplementary water COND1 and the conductivity of the circulating water COND2, the concentration multiple is calculated. When the concentration multiple is less than 3, no water is drained and only water is replenished according to the liquid level control. At this time, the ozone injection amount in the water is controlled at about 0.01mg / L; as the concentration multiple increases to 3-8, automatic replenishment and drainage are turned on to make the concentration multiple not exceed 8, and the ozone injection amount is added according to the target value of 0.05mg / L of ozone concentration in the water, and the injection amount adjustment control range is the lower limit 0.01mg / L-upper limit 0.1mg / L; S4: Anti-corrosion during the winter air conditioning shutdown season. When the temperature is below freezing, the pipeline is prevented from freezing and cracking. The intelligent monitoring and drainage is started. At the same time, the oxygen and nitrogen generator is used to generate nitrogen to purge the circulating water pipeline to reduce the humidity of the pipeline. Nitrogen is continuously filled to isolate oxygen and inhibit corrosion. When the circulation pump is stopped for more than 1 month and the outdoor circulating water temperature is lower than or equal to 0°C, the circulating cooling water drain valve and the vent valve are opened to drain water. When the flow data tends to 0 and does not rise for x minutes, nitrogen production is automatically started and injected into the circulating water pipeline for purge. According to the internal program, when the purge time is greater than a hour and the humidity in the pipeline is less than b, the valves at both ends of the pipeline are automatically closed through the control system, and nitrogen is continuously filled until the pressure in the pipeline reaches 2 bar. The nitrogen system stops. When the pressure in the pipeline decays to 1 bar, nitrogen is started again to fill to 2 bar to achieve nitrogen anti-corrosion. S5: Intelligent control of oxygen and nitrogen production. The integrated equipment automatically starts and shuts down the ozone corrosion inhibition process according to the collected circulation pump start and stop and flow signals. When the circulating cooling water system stops running, the automatic control stops the injection of ozone at the same time. When the circulation pump starts, the ozone injection continues. According to the real-time monitoring data of the circulation pump start and stop and the outdoor water temperature, the system drainage and nitrogen purge corrosion inhibition process are automatically started. The integrated equipment intelligently selects oxygen or nitrogen production according to the circulation pump start and stop and flow signals.

10. A method for anti-corrosion of central air-conditioning circulating water pipelines according to claim 9, characterized in that: The dry nitrogen gas analyzed after the molecular sieve adsorption is blown into the ozone generator to reduce the humidity inside the equipment and prevent the risk of condensation short circuit. The method for calculating the concentration multiple is (COND2 / COND1). The values ​​of a, b, and x in S4 are different according to different volume water systems and are set during on-site commissioning. In S5, both oxygen production and nitrogen production use PSA to separate nitrogen and oxygen in the air. Nitrogen is discharged during oxygen production, and oxygen is discharged during nitrogen production. During oxygen production, the discharged nitrogen is collected and introduced into the ozone generator, and the equipment is dried to prevent condensed water from condensing and damaging the equipment. The oxygen discharged during nitrogen production can be discharged into the indoor fresh air system nearby or discharged on site.

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