A circulating cooling water quality stabilizing integrated treatment device and method

Abstract

The application provides a circulating cooling water quality stabilizing integrated treatment device and method, and relates to a unit water treatment device including a filtering device, an electrically driven membrane treatment device, an electrochemical hardness removal and sterilization device, a chemical dosing device, an online water quality detection device and a smart operation management system. The smart operation management system collects process operation data and water quality detection data of each unit water treatment device through an internet-of-things data collection unit, performs real-time data processing and analysis through an edge computing system, and realizes operation management of each unit water treatment device of the circulating cooling water system and evaluation and display of the overall operation effect of the circulating cooling water system by using an intelligent control system. The application has the beneficial effects of realizing water quality stabilization and ultra-low discharge of the circulating cooling water under high concentration ratio, improving the bearing range of the system to calcium and magnesium hardness and alkalinity, and realizing smart operation management of the entire circulating cooling water system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, more particularly to a circulating cooling water quality stabilizing integrated treatment device and method. BACKGROUND

[0002] The circulating cooling water system is one of the essential energy media for petrochemical enterprise production and also the largest water consumption device of the enterprise. The stable operation of the circulating cooling water system has an extremely important influence on realizing the long-period stable operation of the production process, and the stable treatment of the circulating cooling water quality is an important link for realizing the stable operation of the circulating cooling water system.

[0003] For a long time, the circulating cooling water system mainly adopts the method of adding chemical agents to maintain the stability of the circulating cooling water quality. With the improvement of the enterprise water saving and emission reduction and environmental protection demand, the sewage recycling circulating cooling water system is an important way for the enterprise water saving, and therefore the increasingly complex problems of the water source for supplementing also lead to certain difficulties in maintaining the stable operation of the circulating cooling water system at a high concentration ratio by simply relying on the method of chemical agents. In recent years, the emerging water treatment technologies and products based on physical technologies such as ultrasonic waves, magnetic fields and electric fields are increasingly applied to the research and application of scale removal, scale inhibition and sterilization in the circulating cooling water system, but in the implementation process, the application of such technologies still has problems such as limited treatment capacity and significant influence of water quality on treatment efficiency, which leads to certain limitations in the application field, especially in the implementation cost of large-scale circulating cooling water systems, which limits the further popularization and application.

[0004] Therefore, in view of the high stable control demand of the circulating cooling water concentration ratio, it is urgent to improve the circulating cooling water quality stabilization technology to realize the stable operation, water saving and emission reduction, precise control and intelligent management of the circulating cooling water system. SUMMARY

[0005] The present application overcomes the deficiencies in the prior art and provides a circulating cooling water quality stabilizing integrated treatment device and method.

[0006] The purpose of the present application is achieved by the following technical solutions.

[0007] The circulating cooling water quality stabilizing integrated treatment device comprises:

[0008] The circulating cooling water suction pool is connected with the water supplement pipeline and the chemical agent adding device respectively;

[0009] The filtering device is a two-stage filtering device, the first-stage filtering water outlet of the filtering device is connected with the circulating cooling water suction pool and the two-stage filtering water inlet respectively, and the two-stage filtering water outlet of the filtering device is connected with the water inlet of the electrically driven membrane treatment device;

[0010] The electrically driven membrane treatment device is connected with the circulating cooling water suction pool through a water production pipeline, and is connected with the electrochemical water softening and sterilization device through a concentrated brine pipeline;

[0011] The electrochemical water softening and sterilization device is connected with the circulating cooling water suction pool through a water production pipeline;

[0012] The water quality online detection device is connected with the water supplement pipeline, the circulating cooling water suction pool, the water production pipeline of the filtration device, the desalinated water production pipeline of the electrically driven membrane treatment device, and the water production pipeline of the electrochemical water softening and sterilization device.

[0013] The electrically driven membrane treatment device is a two-stage two-section electrically driven membrane treatment device.

[0014] The electrochemical water softening and sterilization device is a two-section mixed arrangement, the first section of the electrochemical water softening and sterilization device is a water softening section, and the second section of the electrochemical water softening and sterilization device is a strengthened sterilization section.

[0015] The water quality online detection device includes a water sample buffer pool, a first detection unit, a second detection unit, and a third detection unit. The first detection unit includes an online conductivity meter, an online turbidity meter, an online pH meter, and an online OPR meter. The second detection unit includes a reagent concentration detector, a corrosion monitoring sensor, and an online water oil detector. The third detection unit includes a hardness detector, an alkalinity detector, a chloride ion detector, and a pipeline cleaning unit. The water sample buffer pool is arranged at the front end of the third detection unit and is connected with the water supplement pipeline, the circulating water sampling pipeline, and the water production pipeline of the electrochemical water softening and sterilization device. Each water sampling pipeline is provided with an electric valve, and each electric valve is automatically and manually controlled by a PLC program. The hardness, alkalinity, and chloride ion of the water in each sampling pipeline are periodically automatically measured and temporarily monitored by the third detection unit.

[0016] The circulating cooling water quality stable integrated treatment device is provided with a smart operation management system, and the smart operation management system includes an internet-of-things data acquisition unit, an edge computing system, and an intelligent control system.

[0017] The internet-of-things data acquisition unit is used to collect the process operation data of the water treatment unit of the filtration device, the process operation data of the water treatment unit of the electrically driven membrane treatment device, the process operation data of the water treatment unit of the electrochemical water softening and sterilization device, the process operation data of the water treatment unit of the chemical dosing device, the process operation data of the water treatment unit of the water quality online detection device, and the water quality detection data.

[0018] The edge computing system is used to perform real-time data processing and analysis on the process operation data and the water quality detection data of the water treatment unit fed back by each device received by the internet-of-things data acquisition unit.

[0019] The intelligent control system comprises a filtration device water treatment unit operation management module, an electrically driven membrane treatment device water treatment unit operation management module, an electrochemical hardness removal and sterilization device water treatment unit operation management module, a chemical dosing device water treatment unit operation management module, a water quality online detection device water treatment unit operation management module, and a circulating cooling water system operation effect evaluation module, which are used for adjusting and controlling each module according to the data feedback of the edge computing system.

[0020] The intelligent control system has the functions of interlocking protection, phase sequence recognition, alarm, water quality prediction and cost accounting, so as to realize the high-level stable control requirement.

[0021] The circulating cooling water system operation effect evaluation module quantitatively examines the corrosion control, scale control, bacteria control and device operation cost control of the circulating water system, and the operation cost control includes the water treatment chemical consumption cost per ton of water treatment, the device energy consumption cost per ton of water treatment, material leakage judgment and water quality early warning function.

[0022] When the corrosion control index of the circulating cooling water system exceeds the preset corrosion standard, the intelligent control system adjusts the working frequency and stroke of the dosing pump of the corrosion inhibitor dosing device in the chemical dosing device water treatment unit operation management module, and automatically increases the dosage of the corrosion inhibitor.

[0023] When the scale control index of the circulating cooling water system exceeds the preset scale index standard, the intelligent control system optimizes one or more of the following decision control schemes:

[0024] The power supply operation parameters of the electrically driven membrane treatment device water treatment unit operation management module control the water desalination efficiency of the device;

[0025] The power supply process operation parameters of the first process section of the electrochemical hardness removal and sterilization device water treatment unit operation management module improve the hardness removal efficiency of the device;

[0026] The working frequency and stroke of the dosing pump of the scale inhibitor dosing device in the chemical dosing device water treatment unit operation management module are adjusted.

[0027] When the bacteria control index of the circulating cooling water system exceeds the preset bacteria control standard, the intelligent control system optimizes one or more of the following decision control schemes:

[0028] The power supply process operation parameters of the second process section of the electrochemical hardness removal and sterilization device water treatment unit operation management module are adjusted;

[0029] The working frequency and stroke of the dosing pump of the sterilization agent dosing device in the chemical dosing device water treatment unit operation management module are adjusted.

[0030] When the corrosion control index, the scale control index, and the bacteria control index of the circulating cooling water system are all better than the preset standard, the intelligent control system will make decision control facing the operation cost, preferably adjusting the power process operation parameters of each process section in the water treatment unit operation management module of the electrochemical hardness removal and sterilization device and adjusting the working frequency and stroke of the chemical dosing pump in the water treatment unit operation management module of the chemical dosing device.

[0031] When the index representing material leakage of the circulating cooling water system exceeds the preset standard, the intelligent control system will preferably adopt an emergency treatment scheme:

[0032] The water inlet and outlet valve opening of the filter device water treatment unit operation management module is adjusted, the backwashing frequency is adjusted, the process operation state of the electrically driven membrane treatment device water treatment unit operation management module and the electrochemical hardness removal and sterilization device water treatment unit operation management module is interlocked controlled, and the working frequency and stroke of the chemical dosing pump in the water treatment chemical dosing device in the water treatment unit operation management module of the chemical dosing device are adjusted according to the material leakage index.

[0033] The filter device process operation data includes the operation data and working state of the filter device water inlet valve, water outlet valve, and blowdown valve, and the running pressure, running time, and inlet and outlet water flow of the filter device;

[0034] The electrically driven membrane treatment device process operation data includes the operation data and working state of the electrically driven membrane treatment device water inlet pump, water outlet pump, and cleaning pump, the power operation data and working state of the electrically driven membrane treatment device, the operation data and working state of the electrically driven membrane treatment device water inlet valve, water outlet valve, and blowdown valve, and the running pressure, temperature, inlet and outlet water flow, water collection tank liquid level, and cleaning water tank liquid level of the electrically driven membrane treatment device;

[0035] The electrochemical hardness removal and sterilization device process operation data includes the operation data and working state of the electrochemical hardness removal and sterilization device water inlet pump, water outlet pump, and fan, the power operation data and working state of the electrochemical hardness removal and sterilization device, the operation data and working state of the electrochemical hardness removal and sterilization device water inlet valve, water outlet valve, and blowdown valve, and the running pressure, temperature, inlet and outlet water flow of the electrochemical hardness removal and sterilization device;

[0036] The chemical dosing device process operation data includes the operation data of the chemical dosing pump, the working state of the chemical dosing pump, and the reagent tank liquid level data of the chemical dosing device;

[0037] The process operation data of the water quality online detection device includes operation data and working conditions of water inlet pumps, water outlet pumps, detection reagent pumps and cleaning pumps of the water quality online detection device, operation data and working conditions of water inlet valves and sewage valves of the water quality online detection device, timer data, buffer pool liquid level and detection reagent bottle liquid level of the water quality online detection device;

[0038] The water quality detection data includes pH value, conductivity, turbidity, ORP value, calcium ion concentration, alkalinity and chlorine ion concentration of make-up water, pH value, conductivity, turbidity, ORP value, calcium ion concentration, alkalinity, chlorine ion concentration, medicament concentration, oil content in water and carbon steel corrosion rate of circulating cooling water, turbidity of secondary filtration water of the filtration device, turbidity, pH value and conductivity of water produced by the electrically driven membrane treatment device, and pH value, conductivity, calcium ion concentration, alkalinity and residual chlorine of water produced by the electrochemical hardness removal and sterilization device.

[0039] The method for treating circulating cooling water by the circulating cooling water quality stabilizing integrated treatment device includes the following specific steps:

[0040] S1, circulating cooling water in a circulating cooling water suction pool is introduced into a filtration device by a water pump to remove suspended solids in the circulating cooling water and reduce turbidity;

[0041] S2, the water produced by the filtration device is subjected to desalination and concentration treatment by an electrically driven membrane treatment device, and desalination water produced by the electrically driven membrane treatment device is returned to the circulating cooling water suction pool;

[0042] S3, concentrated brine produced by the electrically driven membrane treatment device is transported to a first section of a subsequent electrochemical hardness removal and sterilization device to remove scale-forming ions and reduce hardness in the circulating cooling water, and a second section produces a sterilizing substance, and the produced water is reused to the circulating cooling water suction pool;

[0043] S4, a water quality online detection device monitors the water quality of make-up water, circulating cooling water and water produced by the circulating cooling water quality stabilizing integrated treatment device through first, second and third detection units;

[0044] S5, a chemical dosing device adds special phosphorus-free water treatment chemicals to the circulating cooling water suction pool;

[0045] S6, an edge computing system performs real-time data processing and analysis on process operation data and water quality detection data of water treatment units fed back by each device received by an Internet of Things data acquisition unit;

[0046] S7, an intelligent control system optimizes and adjusts the flushing time, operation cycle and flushing intensity of the filtration device according to data feedback of the edge computing system to control the removal efficiency of suspended solids and turbidity to meet the water quality requirements of the electrically driven membrane treatment device;

[0047] S8, the intelligent control system optimizes and adjusts the power supply operation parameters, cleaning mode, cleaning frequency, cleaning time and flushing intensity of the electrically driven membrane treatment device according to the data feedback of the edge computing system, controls the water production desalination efficiency of the device;

[0048] S9, the intelligent control system optimizes and adjusts the power supply operation parameters, cleaning mode, cleaning frequency and cleaning time of the first scale removal section and the second enhanced sterilization section of the electrochemical hardening and sterilization device, controls the scale removal efficiency of the device and the content of the generated sterilization substance;

[0049] S10, the intelligent control system optimizes and adjusts the operation mode, operation cycle and flow of the dosing pump of the chemical dosing device according to the data feedback of the edge computing system, and controls the dosing of the water treatment agent.

[0050] The beneficial effects of the present application are: the present application realizes intelligent operation and maintenance management of the circulating cooling water system through real-time monitoring and analysis of the process operation data and water quality detection data of the stable integrated treatment device of the circulating cooling water system; realizes the complementary advantages between the stable treatment of the circulating cooling water system and the traditional chemical treatment technology and the emerging physical treatment technology, expands the technical application field, especially meets the high stable control demand of the concentration ratio of the large circulating cooling water system, reduces the system water supply amount, reduces the sewage amount, and reduces the sewage treatment cost in the later stage. Realize the precise control of softening, sterilization and corrosion of circulating cooling water quality. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is the structure diagram of the integrated circulating cooling water quality stable treatment device;

[0052] In the figure: 1, circulating cooling water suction tank; 2, filtering device; 3, electrically driven membrane treatment device; 4, electrochemical hardening and sterilization device; 5, chemical dosing device; 6, water quality online detection device; 7, intelligent operation and management system. DETAILED DESCRIPTION

[0053] The technical scheme of the present application will be further described below through specific examples.

[0054] Examples

[0055] The circulating cooling water quality stable integrated treatment device comprises:

[0056] The circulating cooling water suction tank 1 is connected with the water supply pipeline and the chemical dosing device 5 respectively;

[0057] A filtering device 2, which is a two-stage filtering device, has a first-stage filtering water outlet connected to the circulating cooling water suction pool 1 and a two-stage filtering water inlet, and a two-stage filtering water outlet connected to the water inlet of the electromembrane process device 3;

[0058] An electromembrane process device 3, which has a water outlet connected to the circulating cooling water suction pool 1 and a concentrated brine pipeline connected to the water inlet of the electrochemical dehardening and sterilization device 4;

[0059] An electrochemical dehardening and sterilization device 4, which has a water outlet connected to the circulating cooling water suction pool 1;

[0060] An online water quality detection device 6, which is connected to the water supplement pipeline, the circulating cooling water suction pool 1, the water outlet of the filtering device 2, the desalinated water outlet of the electromembrane process device 3, and the water outlet of the electrochemical dehardening and sterilization device 4.

[0061] The electromembrane process device 3 is a two-stage two-section electromembrane process device.

[0062] The electrochemical dehardening and sterilization device 4 is a two-section multi-machine hybrid arrangement, the first section of which is a dehardening section, and the second section of which is a sterilization-enhancing section.

[0063] The online water quality detection device 6 includes a water sample buffer pool, a first detection unit, a second detection unit, and a third detection unit. The first detection unit includes an online conductivity meter, an online turbidity meter, an online pH meter, and an online OPR meter. The second detection unit includes a reagent concentration detector, a corrosion monitoring sensor, and an online water oil detector. The third detection unit includes a hardness detector, an alkalinity detector, a chloride ion detector, and a pipeline cleaning unit. The water sample buffer pool is arranged at the front end of the third detection unit and is connected to the water supplement pipeline, the circulating water sampling pipeline, and the water outlet pipeline of the electrochemical dehardening and sterilization device. Each water sampling pipeline is provided with an electric valve, and each electric valve is automatically and manually controlled by a PLC program. The third detection unit periodically and automatically detects the hardness, alkalinity, and chloride ion of the water in each sampling pipeline.

[0064] The circulating cooling water quality stable integrated treatment device is provided with a smart operation management system 7, which includes an internet-of-things data acquisition unit, an edge computing system, and an intelligent control system.

[0065] The Internet of Things data acquisition unit is used to collect process operation data of a water treatment unit of a filtering device, process operation data of a water treatment unit of an electrically driven membrane treatment device, process operation data of a water treatment unit of an electrochemical hardening and sterilization device, process operation data of a water treatment unit of a chemical dosing device, process operation data and water quality detection data of a water quality online detection device, and process operation data of a water treatment unit of a water quality detection device;

[0066] The edge computing system is used for real-time data processing and analysis of the process operation data and water quality detection data of the water treatment unit fed back by each device received by the Internet of Things data acquisition unit.

[0067] The intelligent control system includes a filtering device water treatment unit operation management module, an electrically driven membrane treatment device water treatment unit operation management module, an electrochemical hardening and sterilization device water treatment unit operation management module, a chemical dosing device water treatment unit operation management module, a water quality online detection device water treatment unit operation management module, and a circulating cooling water system operation effect evaluation module, which are used to adjust and control each module according to the data feedback of the edge computing system.

[0068] The intelligent control system has the functions of interlocking protection, phase sequence recognition, alarm, water quality prediction, and cost accounting, so as to realize high-level stable control requirements.

[0069] The circulating cooling water system operation effect evaluation module quantitatively evaluates the corrosion control, scale control, bacteria control, and device operation cost control of the circulating water system. The operation cost control includes water treatment chemical consumption cost per ton of water treatment, device energy consumption cost per ton of water treatment, material leakage judgment, and water quality early warning function.

[0070] When the corrosion control index of the circulating cooling water system exceeds the preset corrosion standard, the intelligent control system adjusts the working frequency and stroke of the dosing pump of the corrosion inhibitor dosing device in the chemical dosing device water treatment unit operation management module, and automatically increases the dosage of the corrosion inhibitor.

[0071] When the scale control index of the circulating cooling water system exceeds the preset scale index standard, the intelligent control system optimizes one or more of the following decision control schemes:

[0072] The power supply operation parameters of the electrically driven membrane treatment device water treatment unit operation management module control the water desalination efficiency of the device;

[0073] The power supply process operation parameters of the first process section of the electrochemical hardening and sterilization device water treatment unit operation management module improve the hardening efficiency of the device;

[0074] The working frequency and stroke of the dosing pump of the scale inhibitor dosing device in the chemical dosing device water treatment unit operation management module are adjusted.

[0075] When the bacteria control index of the circulating cooling water system exceeds the preset bacteria control standard, the intelligent control system will preferably select one or more of the following decision control schemes:

[0076] Adjusting the power supply process operation parameters of the second process section in the water treatment unit operation management module of the electrochemical hardness removal and sterilization device;

[0077] The dosing pump working frequency and stroke of the sterilizing agent dosing device in the water treatment unit operation management module of the chemical dosing device are adjusted in linkage.

[0078] When the corrosion control index, the scaling control index, and the bacteria control index of the circulating cooling water system are all better than the preset standard, the intelligent control system will make decision control towards operation cost, and preferably adjust the power supply process operation parameters of each process section in the water treatment unit operation management module of the electrochemical hardness removal and sterilization device, and adjust the working frequency and stroke of the dosing pump of the chemical dosing device in the water treatment unit operation management module of the chemical dosing device.

[0079] When the index representing material leakage of the circulating cooling water system exceeds the preset standard, the intelligent control system will preferably adopt an emergency treatment scheme:

[0080] Adjusting the water inlet and outlet valve opening of the water treatment unit operation management module of the filtration device, adjusting the backwashing frequency, interlocking controlling the process operation state of the water treatment unit operation management module of the electrically driven membrane treatment device and the water treatment unit operation management module of the electrochemical hardness removal and sterilization device, and adjusting the working frequency and stroke of the dosing pump of each water treatment chemical dosing device in the water treatment unit operation management module of the chemical dosing device according to the material leakage index.

[0081] The filtration device process operation data includes the operation data and working state of the filtration device water inlet valve, water outlet valve, and blowdown valve, and the operation pressure, operation duration, and inlet and outlet water flow of the filtration device 2;

[0082] The electrically driven membrane treatment device process operation data includes the operation data and working state of the electrically driven membrane treatment device water inlet pump, water outlet pump, and cleaning pump, the power supply operation data and working state of the electrically driven membrane treatment device 3, the operation data and working state of the electrically driven membrane treatment device 3 water inlet valve, water outlet valve, and blowdown valve, and the operation pressure, temperature, inlet and outlet water flow, water collection tank liquid level, and cleaning water tank liquid level of the electrically driven membrane treatment device 3;

[0083] The process operation data of the electrochemical scale removal and sterilization device 4 includes the operation data and working status of the electrochemical scale removal and sterilization device water inlet pump, water production pump and fan, the operation data and working status of the electrochemical scale removal and sterilization device power supply, the operation data and working status of the electrochemical scale removal and sterilization device water inlet valve, water production valve and blowdown valve, the operation pressure, temperature and water inlet and outlet flow of the electrochemical scale removal and sterilization device;

[0084] The process operation data of the chemical dosing device 5 includes the operation data of the chemical dosing device 5 dosing pump, the working status of the chemical dosing device dosing pump and the chemical dosing device 5 reagent tank liquid level data;

[0085] The process operation data of the water quality online detection device 6 includes the operation data and working status of the water quality online detection device 6 water inlet pump, water discharge pump, detection reagent pump and cleaning pump, the operation data and working status of the water quality online detection device 6 water inlet valve and blowdown valve, the timer data, buffer tank liquid level and detection reagent bottle liquid level of the water quality online detection device 6;

[0086] The water quality detection data includes the pH value, conductivity, turbidity, ORP value, calcium ion concentration, alkalinity and chloride ion concentration of the make-up water, the pH value, conductivity, turbidity, ORP value, calcium ion concentration, alkalinity, chloride ion concentration, reagent concentration, oil content in water and carbon steel corrosion rate of the circulating cooling water, the turbidity of the secondary filtration water of the filtration device, the turbidity, pH value and conductivity of the water produced by the electrically driven membrane treatment device 3, and the pH value, conductivity, calcium ion concentration, alkalinity and residual chlorine of the water produced by the electrochemical scale removal and sterilization device 4.

[0087] The method for treating circulating cooling water by the circulating cooling water quality stabilization integrated treatment device includes the following steps:

[0088] S1, the circulating cooling water in the circulating cooling water suction tank 1 is introduced into the filtration device 2 through a water pump to remove suspended solids in the circulating cooling water and reduce turbidity;

[0089] S2, the water produced by the filtration device 2 is subjected to desalination and concentration treatment by the electrically driven membrane treatment device 3, and the desalination water produced by the electrically driven membrane treatment device 3 is returned to the circulating cooling water suction tank 1;

[0090] S3, the concentrated brine produced by the electrically driven membrane treatment device 3 is transported to the first section of the subsequent electrochemical scale removal and sterilization device 4 to remove scale-forming ions and reduce the hardness of the circulating cooling water, and the second section produces a sterilization substance, and the produced water is reused to the circulating cooling water suction tank 1;

[0091] S4, the water quality online detection device 6 monitors the water quality of the make-up water, circulating cooling water and water produced by the circulating cooling water quality stabilization integrated treatment device through the first detection unit, second detection unit and third detection unit;

[0092] S5, the chemical dosing device 5 adds a special phosphorus-free water treatment agent to the circulating cooling water suction tank 1;

[0093] S6, the edge computing system performs real-time data processing and analysis on the process operation data and water quality detection data of the water treatment unit fed back by each device of the Internet of Things data acquisition unit;

[0094] S7, the intelligent control system optimizes and adjusts the flushing time, operation cycle, and flushing intensity of the filtering device 2 according to the data feedback of the edge computing system, controls the removal efficiency of suspended solids and turbidity, and meets the water quality requirements of the electrically driven membrane treatment device 3;

[0095] S8, the intelligent control system optimizes and adjusts the power operation parameters, cleaning method, cleaning frequency, cleaning duration, and flushing intensity of the electrically driven membrane treatment device 3 according to the data feedback of the edge computing system, and controls the water desalination efficiency of the device;

[0096] S9, the intelligent control system optimizes and adjusts the power operation parameters, cleaning method, cleaning frequency, and cleaning duration of the first descaling section and the second enhanced sterilization section of the electrochemical hardening and sterilization device 4 according to the data feedback of the edge computing system, and controls the descaling efficiency and the content of the generated sterilization substance of the device;

[0097] S10, the intelligent control system optimizes and adjusts the operation method, operation cycle, and flow of the dosing pump of the chemical dosing device 5 according to the data feedback of the edge computing system, and controls the addition of the water treatment agent.

[0098] This embodiment adopts a circulating cooling open system of a certain petrochemical enterprise with a circulating amount of 42000 m 3 / h, and the system mainly uses large industrial water, sewage treatment field oil-containing recycled water, and ultrafiltration reverse osmosis produced water for water replenishment. The circulating cooling water system has complex water quality, large water quality fluctuations, different materials of user-side cooling equipment, large number, complex medium-side components, and use conditions, and is prone to various material leaks. It is difficult to control the water quality stably, which affects the long-period operation of the process production device.

[0099] After adopting the integrated circulating cooling water quality stabilization treatment technology to treat the circulating cooling water system, Table 1 shows the circulating cooling water system operation parameters before and after the project implementation, and Table 2 shows the water quality monitoring data.

[0100] Table 1 Circulating cooling water system operation parameters before and after the project implementation

[0101] Outlet water temperature Return water temperature Temperature difference Makeup water quantity Blowdown quantity Makeup water rate Concentration factor ℃ ℃ ℃ m 3 / h]]> m 3 / h]]> ％ Before project implementation 28.1 21.3 6.8 416 115 0.99 3.1 After project implementation 34.6 27.8 6.8 346 12 0.82 10.5

[0102] Table 2 Circulating cooling water quality monitoring data before and after the project implementation

[0103]

[0104] The results of the make-up water rate before and after the use of the contrast circulating cooling water quality stable integrated treatment device show that the make-up water rate is reduced from 0.99% to 0.82%, and is reduced by 0.17%, the make-up water amount is saved by about 610,000 tons per year, and the sewage amount is reduced by 900,000 tons. The application effectively controls the circulating cooling water quality, protects the system equipment pipeline, reduces corrosion and fouling, the maintenance frequency of the water cooler is reduced from 31 times per year to 3 times per year, the maintenance frequency is greatly reduced, thereby prolonging the service life of each equipment and the heat exchange efficiency, and ensuring the long-period operation of the oil refining device.

[0105] The above describes the embodiments of the application in detail, but the content is only the preferred embodiments of the application, and cannot be considered as limiting the implementation scope of the application. Any equivalent changes and improvements made according to the application scope should still belong to the patent coverage scope of the application.

Claims

1. An integrated treatment device for stabilizing circulating cooling water quality, characterized in that, The application relates to a circulating cooling water quality stabilizing integrated treatment device. The circulating cooling water quality stabilizing integrated treatment device comprises a circulating cooling water suction tank, a filtering device, an electrically-driven membrane treatment device, an electrochemical hardening and sterilizing device and a water quality online detection device. The circulating cooling water suction tank is connected with a water supplement pipeline and a chemical dosing device. The filtering device is a two-stage filtering device. The first-stage filtering water outlet of the filtering device is connected with the circulating cooling water suction tank and the second-stage filtering water inlet. The second-stage filtering water outlet of the filtering device is connected with the water inlet of the electrically-driven membrane treatment device. The water outlet pipeline of the electrically-driven membrane treatment device is connected with the circulating cooling water suction tank. The concentrated brine pipeline of the electrically-driven membrane treatment device is connected with the water inlet of the electrochemical hardening and sterilizing device. The water outlet pipeline of the electrochemical hardening and sterilizing device is connected with the circulating cooling water suction tank. The water quality online detection device is connected with the water supplement pipeline, the circulating cooling water suction tank, the filtering device water outlet pipeline, the electrically-driven membrane treatment device desalinated water outlet pipeline and the electrochemical hardening and sterilizing device water outlet pipeline. The circulating cooling water quality stabilizing integrated treatment device is provided with a smart operation management system. The smart operation management system comprises an internet-of-things data acquisition unit, an edge computing system and an intelligent control system. The internet-of-things data acquisition unit is used for collecting process operation data of the filtering device water treatment unit, process operation data of the electrically-driven membrane treatment device water treatment unit, process operation data of the electrochemical hardening and sterilizing device water treatment unit, process operation data of the chemical dosing device water treatment unit, process operation data of the water quality online detection device water treatment unit and water quality detection data. The edge computing system is used for performing real-time data processing and analysis on the process operation data and water quality detection data of the water treatment unit fed back by each device received by the internet-of-things data acquisition unit. The intelligent control system comprises a filtering device water treatment unit operation management module, an electrically-driven membrane treatment device water treatment unit operation management module, an electrochemical hardening and sterilizing device water treatment unit operation management module, a chemical dosing device water treatment unit operation management module, a water quality online detection device water treatment unit operation management module and a circulating cooling water system operation effect evaluation module. The intelligent control system is used for adjusting and controlling each module according to the data feedback of the edge computing system. The filtering device process operation data comprises the operation data and working state of the filtering device water inlet valve, water outlet valve and blowdown valve and the operation pressure, operation time length and inlet and outlet water flow of the filtering device. The electrically-driven membrane treatment device process operation data comprises the operation data and working state of the electrically-driven membrane treatment device water inlet pump, water outlet pump and cleaning pump, the power supply operation data and working state of the electrically-driven membrane treatment device, the operation data and working state of the electrically-driven membrane treatment device water inlet valve, water outlet valve and blowdown valve, the operation pressure, temperature, inlet and outlet water flow, water collecting tank liquid level and cleaning water tank liquid level of the electrically-driven membrane treatment device. The electrochemical hardening and sterilizing device process operation data comprises the operation data and working state of the electrochemical hardening and sterilizing device water inlet pump, water outlet pump and fan, the power supply operation data and working state of the electrochemical hardening and sterilizing device, the operation data and working state of the electrochemical hardening and sterilizing device water inlet valve, water outlet valve and blowdown valve, the operation pressure, temperature and inlet and outlet water flow of the electrochemical hardening and sterilizing device. The process operation data of the chemical dosing device includes operation data of a dosing pump of the chemical dosing device, working state of the dosing pump of the chemical dosing device and liquid level data of a reagent tank of the chemical dosing device; The process operation data of the water quality online detection device includes operation data and working state of a water inlet pump, a drainage pump, a detection reagent pump and a cleaning pump of the water quality online detection device, operation data and working state of a water inlet valve and a blowdown valve of the water quality online detection device, timer data, buffer pool liquid level and detection reagent bottle liquid level of the water quality online detection device; The water quality detection data include pH value, conductivity, turbidity, ORP value, calcium ion concentration, alkalinity and chlorine ion concentration of make-up water and circulating cooling water, reagent concentration, oil content in water and carbon steel corrosion rate; turbidity of secondary filtration water of the filtration device; turbidity, pH value and conductivity of water produced by the electrically driven membrane treatment device; and pH value, conductivity, calcium ion concentration, alkalinity and residual chlorine of water produced by the electrochemical hardness removal and sterilization device.

2. The integrated treatment device for cyclic cooling water quality stabilization according to claim 1, characterized in that: The electrically driven membrane treatment device is a two-stage two-section electrically driven membrane treatment device.

3. The integrated treatment device for cyclic cooling water quality stabilization according to claim 1, characterized in that: The electrochemical hardness removal and sterilization device is a two-section multi-machine hybrid arrangement, the first section of the electrochemical hardness removal and sterilization device is a hardness removal section, and the second section of the electrochemical hardness removal and sterilization device is a strengthened sterilization section.

4. The integrated treatment device for cyclic cooling water quality stabilization according to claim 1, characterized in that: The water quality online detection device includes a water sample buffer pool, a first detection unit, a second detection unit and a third detection unit, the first detection unit includes an online conductivity meter, an online turbidity meter, an online pH meter and an online OPR meter, the second detection unit includes a reagent concentration detector, a corrosion monitoring sensor and an online oil detector in water, the third detection unit includes a hardness detector, an alkalinity detector, a chlorine ion detector and a pipeline cleaning unit, the water sample buffer pool is arranged at the front end of the third detection unit, the water sample buffer pool is connected with a make-up water pipeline, a circulating water sampling pipeline and a water pipeline of the electrochemical hardness removal and sterilization device, electric valves are arranged on the pipelines, the electric valves are automatically and manually controlled by a PLC program, and the hardness, alkalinity and chlorine ion of water in each sampling pipeline are periodically and automatically detected and temporarily monitored by the third detection unit.

5. A method of treating circulating cooling water by a circulating cooling water quality stabilizing integrated treatment device, characterized by, The specific steps include: S1, circulating cooling water in a circulating cooling water suction pool is introduced into a filtration device through a water pump to remove suspended solids in the circulating cooling water and reduce turbidity; S2, water produced by the filtration device is subjected to desalination and concentration treatment through an electrically driven membrane treatment device, and desalination water produced by the electrically driven membrane treatment device is returned to the circulating cooling water suction pool; S3, concentrated brine produced by the electrically driven membrane treatment device is transported to the first section of a subsequent electrochemical hardness removal and sterilization device to remove scale-forming ions, reduce the hardness of the circulating cooling water, the second section produces sterilization substances, and the produced water is reused to the circulating cooling water suction pool; S4, a water quality online detection device detects the water quality of make-up water of a circulating cooling water system, circulating cooling water and produced water of the circulating cooling water water quality stable integrated treatment device through a first detection unit, a second detection unit and a third detection unit; S5, a chemical dosing device adds special phosphorus-free water treatment reagents to the circulating cooling water suction pool. S6, the edge computing system performs real-time data processing and analysis on the process operation data and water quality detection data of the water treatment unit fed back by each device received by the Internet of Things data acquisition unit; S7, the intelligent control system optimizes and adjusts the flushing time, operation cycle and flushing intensity of the filtering device according to the data feedback of the edge computing system, controls the removal efficiency of suspended solids and turbidity to meet the water quality requirements of the electrically driven membrane treatment device; S8, the intelligent control system optimizes and adjusts the power operation parameters, cleaning method, cleaning frequency, cleaning time and flushing intensity of the electrically driven membrane treatment device according to the data feedback of the edge computing system, and controls the water desalination efficiency of the device; S9, the intelligent control system optimizes and adjusts the power operation parameters, cleaning method, cleaning frequency and cleaning time of the first scale removal section and the second enhanced sterilization section of the electrochemical hardening and sterilization device according to the data feedback of the edge computing system, and controls the scale removal efficiency and the content of the generated sterilization substance of the device; S10, the intelligent control system optimizes and adjusts the operation mode, operation cycle and flow of the chemical dosing pump of the chemical dosing device according to the data feedback of the edge computing system, and controls the dosing of the water treatment chemicals.

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