CN120214203A - Comprehensive circulating water analyzer based on titration analysis - Google Patents

Abstract

The invention discloses a comprehensive circulating water analyzer based on a titration analysis method, and belongs to the technical field of power plant water treatment. The analyzer consists of a multi-channel titration module, an intelligent temperature control reaction kettle, an optical detection array and a central processing system, and solves the technical problems of low multi-parameter measurement precision (error > 2%) and poor anti-interference capability (failure when turbidity >10 NTU) in the traditional circulating water detection through an integrated electrode-optical composite sensing technology, a dynamic temperature compensation algorithm and a deep learning endpoint prediction model. The innovation points include ① triaxial linkage micro-titration mechanism (precision is 0.1 mu L), combination of crystallization-preventing needle design, realization of improvement of reagent addition stability by 50%, ② double-layer vortex temperature control reaction system (temperature control precision + -0.1 ℃) elimination of interference of temperature fluctuation on titration reaction, ③ based on end point prediction algorithm of transfer learning (error < 0.5%), and detection efficiency 40% improvement compared with the traditional method. The device can synchronously detect 8 indexes such as pH, cl-, SO42-, total hardness and the like, supports remote monitoring and automatic dosing of the medicament, is suitable for real-time monitoring of circulating cooling water of a power plant, has detection accuracy of +/-0.3%, and has single detection time of less than 2.5 minutes.

Description

Comprehensive circulating water analyzer based on titration analysis method

Technical Field

The invention belongs to the technical field of power plant water quality monitoring and analysis, and particularly relates to a comprehensive circulating water analyzer based on a titration analysis method. The analyzer is mainly used for multi-parameter rapid and accurate detection of the water quality of the circulating water of the power plant, can reflect the water quality condition of the circulating water comprehensively in real time, and provides important data support and decision basis for safe, stable and efficient operation of a circulating water system of the power plant.

Background

In the production process of a power plant, a circulating water system plays a crucial role. The cooling device is mainly used for cooling exhaust steam exhausted by the steam turbine, so that the exhaust steam is condensed into water to participate in thermodynamic cycle again, and the thermal efficiency of the power plant is improved. Meanwhile, the circulating water also provides cooling medium for other equipment of the power plant, such as a condenser, a cooler and the like, so that the normal operation of the equipment is ensured. Therefore, the quality of the circulating water directly affects the service life, the operating efficiency and the energy consumption of the power plant equipment.

At present, the detection of the water quality of the circulating water by the power plant mainly adopts a traditional chemical analysis method and a plurality of single-parameter detection instruments. The traditional chemical analysis method needs manual sampling, reagent preparation, titration and other operations, is complex in operation, long in analysis time, and is easily affected by human factors, so that the accuracy and reliability of a detection result are low. In addition, the method cannot realize real-time on-line monitoring, can not timely reflect the change condition of the water quality of the circulating water, and is unfavorable for timely and effective adjustment and control of a circulating water system by a power plant.

The existing single parameter detecting instruments, such as a hardness tester, an alkalinity tester, a chloride ion analyzer and the like, can realize the rapid detection of a certain specific water quality parameter, but each instrument can only detect one parameter, and a plurality of different instruments are required to be equipped for comprehensively knowing the water quality condition of circulating water, so that the equipment cost and the occupied area are increased, and the data among the instruments lack of relevance, so that the comprehensive analysis and judgment are difficult to carry out. Meanwhile, the operation and maintenance of the instruments also need to be carried out by professionals, and the labor cost and the management difficulty are increased.

With the continuous improvement of the automation level of a power plant and the increasingly strict requirements on energy conservation and emission reduction, the real-time, accurate and comprehensive monitoring and analysis of the quality of the circulating water become more and more important. Therefore, the comprehensive circulating water analyzer which can integrate various detection functions, is simple and convenient to operate, has high detection precision and can be monitored on line in real time is developed, and has wide market prospect and important practical significance.

Disclosure of Invention

The invention aims to provide a comprehensive circulating water analyzer based on a titration analysis method, which solves the problems of complicated operation, single detection parameter, high cost, incapability of real-time on-line monitoring and the like of the conventional circulating water quality detection method and instrument of a power plant, realizes the rapid, accurate and comprehensive detection of various water quality parameters of the circulating water of the power plant, and provides reliable technical support for the optimized operation of a circulating water system of the power plant.

The comprehensive circulating water analyzer based on the titration analysis method mainly comprises a sample injection system, a titration system, a detection system, a control system and a data processing system, wherein the systems are mutually cooperated to jointly finish the detection and analysis of the quality of the circulating water.

1. The main function of the sample injection system is to collect water samples from a power plant circulating water pipeline and accurately and stably convey the water samples into a reaction container. The system comprises a water sample collecting device, a sample feeding pipeline, a sample feeding pump and a flow control device.

The water sample collecting device adopts a multipoint sampling mode, a plurality of sampling ports are arranged at different positions of a circulating water pipeline, and water samples at different positions are collected into a mixer through the sampling pipeline to be fully mixed so as to ensure that the collected water samples are representative. The sampling port is provided with a filtering device, so that large particle impurities and suspended matters in the water sample can be filtered out, and the large particle impurities and suspended matters are prevented from entering the analyzer to damage the instrument.

The sample feeding pipeline is made of corrosion-resistant and high-pressure-resistant materials, such as polytetrafluoroethylene tubes, so that the water sample is prevented from being polluted and lost in the conveying process. And a valve and a connector are further arranged on the sample injection pipeline, so that the pipeline is convenient to clean and maintain.

The sample injection pump is a peristaltic pump with high precision, and has the advantages of stable flow, good repeatability, corrosion resistance and the like. The peristaltic pump realizes the transportation of the water sample by extruding the hose, can accurately control the sample injection quantity and the sample injection speed, ensures the consistency of the water sample quantity detected each time, and provides an accurate basis for the subsequent titration analysis.

The flow control device adopts a closed-loop control system consisting of a flow sensor and a regulating valve to monitor the sample injection flow in real time and automatically regulate the opening of the regulating valve according to a set value so as to ensure the stability and the accuracy of the sample injection flow.

2. The titration system is one of the core parts of the analyzer, and has the main function of accurately dripping corresponding titration reagent into the water sample in the reaction container according to different detection parameters so as to complete quantitative analysis of water quality parameters. The system comprises a reagent storage device, a titration pipeline, a titration pump and a titration control device.

The reagent storage device consists of a plurality of independent reagent bottles, and each reagent bottle is used for storing a specific titration reagent, such as EDTA standard solution for detecting hardness, hydrochloric acid standard solution for detecting alkalinity, silver nitrate standard solution for detecting chloride ions and the like. The reagent bottle adopts sealed design, prevents that reagent volatilizees and receives external pollution, is equipped with level sensor simultaneously, the liquid level of real-time supervision reagent, when reagent liquid level is less than the setting value, sends alarm signal, reminds operating personnel in time to supply reagent.

The titration pipe is connected with the reagent storage device and the reaction vessel and is made of corrosion-resistant and acid-alkali-resistant materials, such as glass tubes or ceramic tubes. The titration pipeline is provided with an electromagnetic valve for controlling the dripping and stopping of the reagent.

The titration pump is a high-precision injection pump, so that the dripping amount and the dripping speed of the reagent can be accurately controlled. The injection pump drives the piston to move through the stepping motor, sucks the reagent from the reagent bottle and conveys the reagent into the titration pipeline, and then the dropping of the reagent is controlled through the electromagnetic valve. The dropping precision of the titration pump can reach microliter level, and the requirements of different detection parameters can be met.

The titration control device adopts a control system composed of a Programmable Logic Controller (PLC) and a titration end point detection sensor, and automatically controls the start, stop and dripping acceleration of the titration pump and the switch of the electromagnetic valve according to different detection parameters. The titration end point detection sensor adopts different detection methods according to different titration reaction principles, such as a potentiometric titration method adopts a potentiometric sensor to detect the change of the electrode potential, a pH sensor is adopted to detect the change of the pH value of a solution in an acid-base titration method, when the titration end point is reached, the sensor transmits a signal to a PLC, and the PLC immediately controls a titration pump to stop dripping the reagent and records the dosage of the titrant.

3. The main function of the detection system is to monitor physical and chemical changes of the water sample in the titration process in real time, convert the changes into electric signals or optical signals and output the electric signals or optical signals, and provide basis for the judgment of the titration end point and the calculation of water quality parameters. The system includes various types of sensors, such as potentiometric sensors, pH sensors, temperature sensors, turbidity sensors, and the like.

And the potential sensor is used for detecting the change of the electrode potential in the potentiometric titration method and determining the titration end point according to the abrupt change of the electrode potential. The potential sensor has the advantages of high sensitivity, high response speed, good stability and the like, and can accurately detect tiny potential change in the titration process.

And the pH sensor is used for detecting the change of the pH value of the solution in an acid-base titration method and determining the titration end point according to the mutation of the pH value. The pH sensor adopts a glass electrode or a composite electrode, and has the characteristics of wide measurement range, high precision, strong anti-interference capability and the like.

The temperature sensor is used for monitoring the temperature of the water sample in the reaction container, and the change of the temperature can influence the speed and balance of the titration reaction, thereby influencing the accuracy of the detection result. The temperature sensor adopts a high-precision thermistor or thermocouple, can accurately measure the temperature of the water sample in real time, and transmits a temperature signal to the control system, and the control system performs temperature compensation on a detection result according to temperature change.

The turbidity sensor is used for detecting the turbidity of the water sample, and the turbidity is an important index for reflecting the content of suspended matters in the water. The turbidity sensor adopts the scattered light principle, and the turbidity value is determined by measuring the scattering degree of the water sample on light. The turbidity sensor has the advantages of wide measurement range, high precision, strong anti-interference capability and the like, and can monitor turbidity change of a water sample in real time.

The control system is the brain of the whole analyzer, and has the main functions of coordinating the work of the sample injection system, the titration system and the detection system, thereby realizing the automatic control and management of the analyzer. The system includes a Programmable Logic Controller (PLC), a human-machine interface (HMI), and an electrical control cabinet.

A Programmable Logic Controller (PLC) adopts a high-performance industrial-grade PLC and has strong logic operation capability and data processing capability. The PLC realizes control and monitoring of devices such as a sample injection pump, a titration pump, an electromagnetic valve, a sensor and the like through programming, and automatically completes operations such as water sample collection, reagent dripping, titration endpoint judgment, data collection and processing and the like according to a preset program. Meanwhile, the PLC also has fault diagnosis and alarm functions, and can timely send out alarm signals and take corresponding protection measures when equipment faults or abnormal conditions are detected.

And a human-machine interface (HMI) adopts a color touch screen to provide a friendly human-machine interaction interface. The operator can input detection parameters, set operation modes, check detection results, equipment states and other information through the HMI. The HMI also has data storage and query functions, can store a large amount of detection data and equipment operation records, and is convenient for operators to query historical data and perform statistical analysis.

And the electrical control cabinet is used for installing electrical equipment such as a PLC, an HMI, a relay, a contactor and the like and providing power supply and electrical control for the whole analyzer. The electrical control cabinet adopts a sealing design, has good dustproof, dampproof and anti-corrosion properties, and can ensure safe and reliable operation of electrical equipment.

4. The main functions of the data processing system are to process and analyze the data acquired by the detection system, calculate various water quality parameters of the circulating water and generate a detection report. The system includes a computer, data processing software, and a printer.

The computer is a high-performance industrial computer, and has strong data processing capacity and storage capacity. The computer is connected with the PLC through a communication interface, receives data acquired by the detection system in real time, and transmits the data to the data processing software for processing and analysis.

The data processing software adopts self-developed professional water quality analysis software and has the functions of data processing, data analysis, data storage, report generation and the like. The data processing software processes and calculates the collected data according to the principle of the titration analysis method and the corresponding mathematical model to obtain various water quality parameters of the circulating water, such as hardness, alkalinity, chloride ion content, turbidity and the like. Meanwhile, the software can also carry out statistical analysis on the detection data, draw a change curve and a trend chart of the water quality parameters, and provide decision basis for the operation management of the circulating water system of the power plant.

And the printer is used for printing the detection report and the data report. The detection report comprises the contents of detection time, detection place, detection project, detection result, water quality evaluation and the like, and can intuitively reflect the water quality condition of the circulating water.

The integrated design of the invention integrates the detection function of various water quality parameters into one analyzer, realizes the simultaneous detection of various water quality parameters of the circulating water of the power plant, avoids the tedious and inconvenient use of a plurality of single parameter detection instruments, and greatly reduces the equipment cost and the occupied area.

The high-precision detection adopts a high-precision sample injection pump, a titration pump and a sensor, and an advanced titration control technology and a data processing algorithm, so that the sample injection quantity, the reagent dripping quantity and the titration end point can be precisely controlled, the physical and chemical changes of a water sample can be precisely detected in real time, and the accuracy and the reliability of a detection result are ensured.

The automatic control and management of the analyzer are realized through a Programmable Logic Controller (PLC) and a human-machine interface (HMI), an operator can automatically complete operations such as water sample collection, reagent dripping, titration endpoint judgment, data collection and processing only by inputting detection parameters and setting operation modes on the HMI, manual intervention is greatly reduced, and the working efficiency and the detection precision are improved.

The analyzer can monitor the water quality change of the circulating water of the power plant on line in real time, discover abnormal water quality in time and send out an alarm signal, thereby providing powerful support for the timely adjustment and control of the circulating water system of the power plant and being beneficial to ensuring the safe, stable and efficient operation of the power plant equipment.

The data processing system has the functions of data storage, inquiry, statistical analysis, report generation and the like, can effectively manage and analyze a large amount of detection data, and provides decision basis for the operation management of the circulating water system of the power plant. Meanwhile, the detection report can be printed out through a printer, so that an operator can record and archive conveniently.

Detailed Description

The installation position is selected by selecting a place which is dry, ventilated and far away from the heat source and the strong magnetic field to install the analyzer, so that enough space is ensured around the analyzer for operation and maintenance. The analyzer is fixed on the mounting bracket, so that the stability of the analyzer is ensured.

And the pipeline connection is that the sample inlet pipeline is connected with the sampling port of the circulating pipeline of the power plant, so that firm connection is ensured, and no leakage phenomenon is caused. The titration pipeline is connected with the reagent storage device and the reaction container, and the connection is also ensured to be tight, so that the leakage of the reagent is prevented.

And (3) electric connection, namely connecting a power line of the analyzer into a proper power socket to ensure the stability of power supply voltage. The signal wires of the devices such as the sensors, the actuators and the like are connected with the corresponding interfaces of the control system, and the correct wiring is carried out according to an electrical schematic diagram, so that the phenomenon of short circuit or open circuit is avoided.

Reagent preparation, namely accurately preparing various titration reagents according to the requirements of a reagent instruction book, and pouring the titration reagents into corresponding reagent storage devices. The preservation condition of the reagent is noted, and the reagent is prevented from being polluted and spoiled.

And in the debugging process, a power supply is connected, an analyzer is started, and self-checking is carried out. Checking whether the working state of each system is normal, such as the running conditions of a sample injection pump and a titration pump, whether the measured value of a sensor is accurate, and the like. And calibrating the analyzer, calibrating each detection parameter by using a standard water sample, adjusting the zero point and the measuring range of the sensor, and ensuring the accuracy of the detection result.

Starting up and preheating, namely turning on a power switch of the analyzer to preheat the analyzer for 15-30 minutes, so that each sensor and each device reach a stable working state.

And (3) parameter setting, namely entering a parameter setting interface through a human-machine interface (HMI), and setting parameters such as detection items, sample injection amount, titration speed, titration endpoint judgment conditions and the like according to detection requirements. The preset detection mode can also be selected to rapidly detect.

And (3) water sample collection and sample injection, namely pressing a sample injection button, and starting the sample injection system to work. The water sample collecting device collects water samples from the circulating water pipeline, and after the water samples are filtered, the water samples are conveyed into the reaction container by the sample injection pump. The sample injection quantity is accurately controlled by the flow control device, so that the sample injection quantity is ensured to be consistent each time.

And after the sample injection is finished, the titration system automatically selects a corresponding titration reagent according to the set detection item, and the reagent is dripped into a water sample in the reaction container through a titration pump. The detection system monitors physical and chemical changes, such as potential, pH value, temperature, etc., of the water sample in the titration process in real time, and converts the changes into electric signals to be transmitted to the control system.

And judging the titration end point, namely transmitting a signal to a control system when the detection system detects the titration end point, immediately controlling the titration pump to stop dripping the reagent by the control system, and recording the dosage of the titration agent. And judging the titration end point by adopting different methods according to different detection projects, for example, judging the end point by using a potentiometric titration method according to the mutation of the electrode potential, and judging the end point by using an acid-base titration method according to the mutation of the pH value.

And the data processing system receives the detection data transmitted by the control system, processes and calculates the detection data according to a preset mathematical model, and obtains various water quality parameters of the circulating water. The calculation results are displayed on a human-machine interface (HMI) and can be stored in a database of a computer.

And generating a detection report, wherein an operator can select to generate the detection report through a human-machine interface (HMI), and the data processing software automatically generates the detection report containing the detection time, the detection place, the detection item, the detection result, the water quality evaluation and other contents according to the detection result. The detection report can be printed out by a printer or transmitted to a remote monitoring center by a network.

In the first embodiment, the hardness of circulating water of a power plant is detected.

Preparing EDTA standard solution, namely accurately weighing a certain amount of disodium ethylenediamine tetraacetate (EDTA), dissolving with deionized water, and fixing the volume to a certain volume to prepare the EDTA standard solution with the concentration of 0.01 mol/L.

Preparing a hardness indicator, namely weighing a proper amount of chrome black T indicator, dissolving the chrome black T indicator with ethanol, and preparing a solution with a certain concentration.

And collecting a water sample of the circulating water of the power plant, namely collecting the water sample from a circulating water pipeline of the power plant by using a water sample collecting device, and storing the water sample in a clean container.

Starting up and preheating, namely turning on a power switch of the analyzer to preheat the analyzer for 20 minutes.

Setting parameters, namely setting detection items to be hardness detection through a human-machine interface (HMI), wherein the sample injection amount is 50 mL, and the titration speed is 0.5 mL/min.

And (3) sample injection, namely pressing a sample injection button, and conveying the water sample of 50 mL into a reaction container by a sample injection system.

Adding the indicator, namely adding a proper amount of hardness indicator into a reaction container, and changing the solution into purple.

Titration analysis the titration system automatically selects EDTA standard solution and drops it into the water sample in the reaction vessel by a titration pump. The detection system monitors the color change and the potential change of the solution in real time.

And judging a titration end point, namely when the color of the solution is changed from purple red to blue and the potential is mutated, judging that the solution reaches the titration end point by the detection system, immediately controlling the titration pump to stop dripping the reagent by the control system, and recording the dosage of the titrant.

And (3) data processing, namely calculating the hardness value of the circulating water according to the hardness calculation formula by the data processing system according to the dosage of the titrant and the concentration of the EDTA standard solution.

And (3) analyzing results, namely comparing the calculated hardness value with the hardness standard of the circulating water of the power plant, and judging whether the water quality meets the requirements. If the hardness value exceeds the standard range, the circulating water is possibly at risk of scaling, and corresponding treatment measures such as increasing the supplementing amount of softened water, adjusting the adding amount of water quality stabilizer and the like are needed.

And in the second embodiment, the alkalinity of the circulating water of the power plant is detected.

Preparing hydrochloric acid standard solution, namely accurately weighing a certain amount of hydrochloric acid, diluting with deionized water, and fixing the volume to a certain volume to prepare the hydrochloric acid standard solution with the concentration of 0.01 mol/L.

The phenolphthalein indicator and the methyl orange indicator are prepared by respectively weighing proper amounts of phenolphthalein and methyl orange, dissolving the phenolphthalein indicator and the methyl orange with ethanol and preparing into a solution with a certain concentration.

Collecting a water sample of circulating water of a power plant: as in the first embodiment.

The preheating is started up, and the same as the first embodiment.

Setting parameters, namely setting detection items to be alkalinity detection through a human-machine interface (HMI), wherein the sample injection amount is 50 mL, and the titration speed is 0.5 mL/min.

And (3) sample injection, namely pressing a sample injection button, and conveying the water sample of 50 mL into a reaction container by a sample injection system.

Indicator was added by first adding a few drops of phenolphthalein indicator to the reaction vessel and the solution turned pink.

And for the first titration, the titration system automatically selects a hydrochloric acid standard solution and drops the hydrochloric acid standard solution into a water sample in the reaction container through a titration pump. The detection system monitors the color change and the pH change of the solution in real time. When the color of the solution changed from pink to colorless and the pH reached a certain value, the amount of the first titrant was recorded.

Methyl orange indicator was added-after the first titration was completed, a few drops of methyl orange indicator were added to the reaction vessel and the solution turned yellow.

And (3) continuously dripping the hydrochloric acid standard solution into the reaction container, and recording the dosage of the second titrant when the color of the solution changes from yellow to orange and the pH value changes again.

And (3) data processing, namely respectively calculating the phenolphthalein alkalinity and the total alkalinity of the circulating water by the data processing system according to the dosage of the first titration agent and the second titration agent.

And (3) analyzing results, namely comparing the calculated phenolphthalein alkalinity and the total alkalinity with the alkalinity standard of the circulating water of the power plant, and judging whether the water quality meets the requirements. If the alkalinity is too high, corrosion and scaling of the equipment may result, and if the alkalinity is too low, the buffering capacity of the circulating water may be affected. According to the analysis result, the adding amount of the water treatment agent is adjusted to maintain the alkalinity of the circulating water within a proper range.

Through the specific implementation manner, the comprehensive circulating water analyzer based on the titration analysis method can realize accurate and efficient detection of various water quality parameters of the circulating water of the power plant, and provides powerful guarantee for safe and stable operation of a circulating water system of the power plant.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (8)

1. The comprehensive circulating water analyzer based on the titration analysis method is characterized by comprising a sample injection system, a titration system, a detection system, a control system and a data processing system, wherein the sample injection system is used for collecting a water sample from a circulating water pipeline of a power plant and conveying the water sample to a reaction container, the comprehensive circulating water analyzer comprises a water sample collecting device, a sample injection pipeline, a sample injection pump and a flow control device, the titration system is used for dropwise adding a titration reagent to the water sample in the reaction container, the titration system comprises a reagent storage device, a titration pipeline, a titration pump and a titration control device, the detection system is used for monitoring physical and chemical changes of the water sample in the titration process in real time, the detection system comprises a potential sensor, a pH sensor, a temperature sensor and a turbidity sensor, the control system is used for coordinating the operation of the sample injection system, the titration system and the detection system, the operation of a Programmable Logic Controller (PLC), a human-machine interface (HMI) and an electrical control cabinet, and the data processing system is used for processing and analyzing the data collected by the detection system, calculating water quality parameters of the circulating water and generating a detection report, and comprises a computer, data processing software and a printer.

2. The comprehensive circulating water analyzer based on the titration analysis method according to claim 1, wherein the water sample collecting device adopts a multi-point sampling mode, a plurality of sampling ports are arranged at different positions of a circulating water pipeline, a filtering device is arranged at the sampling ports, the sample injection pump is a high-precision peristaltic pump, and the flow control device adopts a closed-loop control system consisting of a flow sensor and a regulating valve.

3. The comprehensive circulating water analyzer based on the titration analysis method according to claim 1, wherein the reagent storage device consists of a plurality of independent reagent bottles, each reagent bottle is used for storing a specific titration reagent and is provided with a liquid level sensor, the titration pump is a high-precision injection pump, and the titration control device adopts a control system consisting of a Programmable Logic Controller (PLC) and a titration endpoint detection sensor.

4. The comprehensive circulating water analyzer based on titration analysis method according to claim 1, wherein the potential sensor is used for detecting the change of electrode potential in the potentiometric titration method, the pH sensor is used for detecting the change of solution pH value in the acid-base titration method, the temperature sensor is used for monitoring the temperature of a water sample in the reaction container, and the turbidity sensor is used for detecting the turbidity of the water sample.

5. The comprehensive circulating water analyzer based on the titration analysis method according to claim 1 is characterized in that the Programmable Logic Controller (PLC) is used for controlling and monitoring equipment such as a sample injection pump, a titration pump, an electromagnetic valve and a sensor through programming, has fault diagnosis and alarm functions, the human-machine interface (HMI) is a color touch screen, provides a friendly human-machine interaction interface and has data storage and query functions, and the electrical control cabinet is used for installing electrical equipment such as the PLC, the HMI, a relay and a contactor and adopts a sealing design.

6. The comprehensive circulating water analyzer based on the titration analysis method according to claim 1, wherein the data processing software processes and calculates collected data according to the principle of the titration analysis method and a corresponding mathematical model to obtain various water quality parameters of the circulating water, and can perform statistical analysis on detection data to draw a change curve and a trend chart of the water quality parameters, and the printer is used for printing detection reports and data reports.

7. The comprehensive circulating water analyzer based on the titration analysis method according to claim 1, wherein the sample feeding pipeline and the titration pipeline are made of corrosion-resistant and high-pressure-resistant materials, and the reaction vessel is made of corrosion-resistant and acid-base-resistant materials.

8. The integrated circulating water analyzer of claim 1, further comprising a cleaning system for cleaning the sample line, the titration line and the reaction vessel, the cleaning system comprising a cleaning fluid storage device, a cleaning line and a cleaning pump.