A method for adjusting the drain level of desalted water heater under different loads

Abstract

The present invention discloses a method for adjusting the drain level of a desalted water heater under different loads, which relates to the technical field of thermal system control, including: using a liquid level sensor to detect the drain level of the desalted water heater, and transmitting the detection signal to an intelligent controller; the intelligent controller generates a liquid level adjustment control signal using a preset load prediction model according to the detection signal and the current load data of the unit; the liquid level adjustment control signal is sent to an electric regulating valve, and the drain flow of the desalted water heater is adjusted by the electric regulating valve. The present invention not only significantly improves the stability of the drain level, reduces the amplitude of liquid level fluctuation, and improves the heat exchange efficiency and operation safety of the heater, but also reduces energy consumption and maintenance costs by optimizing the control strategy, and has significant economic and social benefits.

Description

Technical Field

[0001] The invention relates to the technical field of thermal system control, in particular to a method for adjusting the drain liquid level of a desalted water heater under different loads. Background Art

[0002] In complex power systems such as thermal power plants and nuclear power plants, desalted water heaters, as key auxiliary equipment, play a vital role in ensuring the safe and efficient operation of the unit. Desalted water heaters heat desalted water to increase its temperature to meet the water inlet requirements of boilers or other thermal equipment. However, as the load of the unit changes, the drain level in the desalted water heater will also fluctuate, which has a significant impact on the stable operation of the heater and the efficiency of the entire thermal system. The change in unit load is usually determined by multiple factors such as power grid demand and equipment maintenance plan, and this change is often unpredictable and rapid. When the unit load increases or decreases rapidly, the water flow and temperature in the desalted water heater will also change accordingly, resulting in fluctuations in the drain level. If the drain level is too high, it may cause the internal pressure of the heater to increase, and even cause safety accidents; if the drain level is too low, it may affect the heat exchange efficiency of the heater, increase energy consumption, and may also have adverse effects on downstream equipment. Therefore, it is of great significance to study the drain level adjustment method of the desalted water heater under different unit loads to improve the safety and economy of the unit.

[0003] In the existing technical solutions, the methods for adjusting the drain level of the desalted water heater mainly include float regulating valve, electric regulating valve, steam-liquid two-phase flow self-regulating steam trap and intelligent control system. The float regulating valve controls the valve opening by the rise and fall of the float with the liquid level. Although the structure is simple, the adjustment accuracy is limited by the volume and weight of the float, and the response speed is slow under high load changes. The electric regulating valve drives the valve opening through the electric actuator and automatically adjusts according to the signal feedback from the liquid level sensor. It has high adjustment accuracy and fast response speed, but it relies on electric drive, has the risk of failure, and the electrical components are easily damaged in a high humidity environment. The steam-liquid two-phase flow self-regulating steam trap uses the self-regulating characteristics of the steam-liquid two-phase flow to adjust the drain flow by controlling the flow state of the steam-liquid two-phase in the valve body. It does not require external energy drive, is reliable in operation, and is easy to maintain. However, the adjustment accuracy is greatly affected by the valve body structure and fluid characteristics, and the adjustment may be unstable under extreme working conditions. The intelligent control system combines advanced sensor technology, control algorithms and communication technology to achieve real-time monitoring and precise control of the drain level. It is highly automated, has high adjustment accuracy and fast response speed, but the system is highly complex, costly and requires high technical skills of maintenance personnel. In summary, the existing technical solutions have their own advantages and disadvantages, but they all have certain limitations when dealing with rapid changes in unit loads and cannot fully meet the high requirements of modern power systems for safety and economy. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the present invention provides a method for adjusting the drain liquid level of a desalted water heater under different loads, which can solve the problems mentioned in the background technology.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a method for adjusting the drain liquid level of a desalted water heater under different loads, comprising: using a liquid level sensor to detect the drain liquid level of the desalted water heater, and transmitting the detection signal to an intelligent controller; the intelligent controller generates a liquid level adjustment control signal based on the detection signal and the current load data of the unit using a preset load prediction model; the liquid level adjustment control signal is sent to an electric regulating valve, and the drain flow of the desalted water heater is adjusted by the electric regulating valve.

[0007] As a preferred solution of the method for adjusting the hydrophobic liquid level of a desalted water heater under different loads described in the present invention, a liquid level sensor is used to detect the hydrophobic liquid level of the desalted water heater, and the detection signal is transmitted to an intelligent controller, comprising the following steps: installing a liquid level sensor on the side wall of the desalted water heater; collecting hydrophobic liquid level data in the desalted water heater through the liquid level sensor; filtering and amplifying the hydrophobic liquid level data to obtain a hydrophobic liquid level detection signal; and transmitting the hydrophobic liquid level detection signal to the intelligent controller.

[0008] As a preferred solution of the method for adjusting the drain liquid level of a desalted water heater under different loads described in the present invention, wherein: the intelligent controller generates a liquid level adjustment control signal based on the detection signal and the current load data of the unit using a preset load prediction model, comprising the following steps: training the load prediction model based on the historical operation data of the desalted water heater and storing it in the intelligent controller; comparing the detection signal with the preset drain liquid level standard value to obtain a liquid level deviation value; inputting the current load data of the unit into the load prediction model to obtain a predicted load value; and calculating the liquid level adjustment control signal based on the liquid level deviation value and the predicted load value through a fuzzy control algorithm.

[0009] As a preferred solution of the method for adjusting the deionized water heater drain level under different loads described in the present invention, wherein: based on the liquid level deviation value and the predicted load value, the liquid level regulation control signal is calculated by a fuzzy control algorithm, including the following steps: fuzzy quantizing the liquid level deviation value to obtain a membership value of the liquid level deviation; dividing the predicted load value according to the load level to obtain a load interval identifier; if the membership value of the liquid level deviation is positive and the load interval identifier is an ascending stage, the membership value of the liquid level deviation is mapped to a first adjustment coefficient; if the membership value of the liquid level deviation is negative and the load interval identifier is a descending stage, the membership value of the liquid level deviation is mapped to a second adjustment coefficient; if the absolute value of the membership value of the liquid level deviation is greater than a preset threshold and the load interval identifier is in a changing state, the membership value of the liquid level deviation is mapped to a third adjustment coefficient; select the corresponding adjustment coefficient according to the priority order of the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient; multiply the adjustment coefficient by the reference control amount to obtain the liquid level regulation control signal.

[0010] As a preferred solution of the method for adjusting the drain liquid level of a desalted water heater under different loads described in the present invention, wherein: the liquid level adjustment control signal is sent to an electric control valve, and the drain flow of the desalted water heater is adjusted by the electric control valve, comprising the following steps: converting the liquid level adjustment control signal into an opening control signal of the electric control valve; sending the opening control signal to the actuator of the electric control valve through a signal transmission line; the actuator drives the valve movement of the electric control valve to change the drain flow area of ​​the desalted water heater; monitoring the actual opening value of the electric control valve, and feeding back the actual opening value to the intelligent controller.

[0011] As a preferred solution of the method for adjusting the drain liquid level of a desalted water heater under different loads described in the present invention, wherein: the actuator drives the valve movement of the electric regulating valve to change the drain flow area of ​​the desalted water heater, comprising the following steps: the actuator receives the opening control signal and converts the electrical signal into mechanical movement; if the change rate of the opening control signal exceeds the preset change rate, the actuator drives the valve movement in a segmented adjustment manner; if an increase in resistance is detected during the movement of the valve, the actuator increases the output torque; if the deviation between the actual opening value and the opening control signal exceeds the preset deviation value, the actuator enters a self-calibration mode; and dynamically adjusts the drain flow area according to the position of the valve movement.

[0012] As a preferred solution of the method for adjusting the hydrophobic liquid level of a desalted water heater under different loads described in the present invention, the self-calibration mode includes the following contents: the actuator records the current valve position as the initial calibration position; the actuator controls the valve to move throughout the entire process and collects the driving parameters of the valve at different positions; if the driving parameters exceed the calibration range, the actuator reciprocates at the position; the actuator compares the driving parameters collected from the reciprocating motion with the preset parameters to generate a position compensation value; the actuator writes the position compensation value into the control parameter table; the actuator repositions to the target position corresponding to the opening control signal according to the compensation value in the control parameter table.

[0013] To further solve the above technical problems, the present invention provides the following technical solutions: a system for adjusting the drain liquid level of a desalted water heater under different loads, comprising: a liquid level detection module, which is used to detect the drain liquid level of the desalted water heater using a liquid level sensor, and transmit the detection signal to an intelligent controller; a signal generation module, which is used for the intelligent controller to generate a liquid level adjustment control signal based on the detection signal and the current load data of the unit using a preset load prediction model; a flow adjustment module, which is used to send the liquid level adjustment control signal to an electric control valve, and adjust the drain flow of the desalted water heater through the electric control valve.

[0014] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of the method for adjusting the drain liquid level of a desalted water heater under different loads as described above are implemented.

[0015] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method for adjusting the drain liquid level of a desalted water heater under different loads as described above are implemented.

[0016] Beneficial effects of the present invention: The present invention uses a high-precision liquid level sensor to monitor the drain liquid level in real time, and combines the intelligent controller and the preset load prediction model to generate a liquid level adjustment control signal, and finally adjusts the drain flow rate through the electric control valve, thereby achieving accurate and rapid adjustment of the drain liquid level. The present invention not only significantly improves the stability of the drain liquid level, reduces the amplitude of liquid level fluctuation, improves the heat exchange efficiency and operation safety of the heater, but also reduces energy consumption and maintenance costs by optimizing the control strategy, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall process of a method for adjusting the drain liquid level of a desalted water heater under different loads proposed by the present invention;

[0019] Figure 2 This is a computer equipment diagram of a method for adjusting the drain liquid level of a desalted water heater under different loads proposed by the present invention. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Example 1, reference Figure 1 , which is an embodiment of the present invention, provides a method for adjusting the drain liquid level of a desalted water heater under different loads.

[0023] The present application provides a method for effectively solving the above-mentioned problems. Next, a plurality of embodiments will be combined to elaborate on how to implement the method for adjusting the drain liquid level of the desalted water heater under different loads.

[0024] Figure 1 The overall flow chart of a method for adjusting the drain level of a desalted water heater under different loads is shown, including:

[0025] S1: A liquid level sensor is used to detect the deionized water level of the deionized water heater and transmit the detection signal to the intelligent controller.

[0026] S1.1: Install a liquid level sensor on the side wall of the desalted water heater;

[0027] S1.2: Collect the deionized water level data in the deionized water heater through the liquid level sensor;

[0028] S1.3: filtering and amplifying the hydrophobic liquid level data to obtain a hydrophobic liquid level detection signal;

[0029] S1.4: Transmit the hydrophobic liquid level detection signal to the intelligent controller.

[0030] In the present invention, a high-precision, corrosion-resistant liquid level sensor is first installed on the side wall of the desalted water heater. The liquid level sensor collects the hydrophobic liquid level data in the heater by directly contacting the element with the hydrophobic liquid of the desalted water heater. The collected data contains the height information of the hydrophobic liquid surface. Due to the noise interference in the industrial site, the collected original hydrophobic liquid level data needs to be filtered by the signal conditioning circuit to eliminate the interference signal, and the weak liquid level signal is amplified to obtain a standard hydrophobic liquid level detection signal. The processed hydrophobic liquid level detection signal is transmitted to the input interface of the intelligent controller through the signal transmission line, providing a data basis for subsequent load prediction and liquid level regulation. The liquid level detection scheme adopted by the present invention effectively solves the technical problems of slow response speed and low precision in the traditional float type liquid level detection method through the cooperation of high-precision sensors and signal processing circuits.

[0031] S2: The intelligent controller generates a liquid level adjustment control signal based on the detection signal and the current load data of the unit using a preset load prediction model.

[0032] S2.1: Train the load prediction model based on the historical operation data of the desalted water heater and store it in the intelligent controller. It should be noted that the present invention specifically refers to the load prediction of the desalted water heater drain system, which is different from the conventional unit load prediction. The model not only considers the unit load change, but also integrates the characteristic parameters of the drain system, so that the prediction result is more suitable for drain level regulation.

[0033] S2.2: Compare the detection signal with the preset hydrophobic liquid level standard value to obtain the liquid level deviation value.

[0034] S2.3: Input the current load data of the unit into the load prediction model to obtain the predicted load value.

[0035] S2.4: Based on the liquid level deviation value and the predicted load value, the liquid level regulation control signal is calculated through the fuzzy control algorithm.

[0036] It should be noted that the fuzzy control algorithm in the present invention is a control strategy specifically designed for hydrophobic liquid level regulation, which fuzzifies information in two dimensions, namely, liquid level deviation and load prediction, so as to establish control rules that are more in line with the characteristics of the hydrophobic system.

[0037] Specifically, the liquid level deviation value is fuzzy quantized to obtain the membership value of the liquid level deviation;

[0038] Divide the predicted load value according to the load level to obtain the load interval identification;

[0039] If the membership value of the liquid level deviation is positive and the load interval is marked as an ascending stage, the membership value of the liquid level deviation is mapped to a first adjustment coefficient;

[0040] If the membership value of the liquid level deviation is negative and the load interval is marked as a descending stage, the membership value of the liquid level deviation is mapped to a second adjustment coefficient;

[0041] If the absolute value of the membership value of the liquid level deviation is greater than the preset threshold and the load interval identifier is in a changing state, the membership value of the liquid level deviation is mapped to a third adjustment coefficient;

[0042] Selecting a corresponding adjustment coefficient according to the priority order of the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient;

[0043] Multiply the adjustment coefficient by the reference control quantity to obtain the liquid level adjustment control signal.

[0044] Preferably, S2.4 solves the hysteresis problem of the traditional single liquid level feedback control method by establishing a dual control mechanism of liquid level deviation and predicted load value. Specifically, when the load changes, the control system can adjust the control strategy in advance based on the predicted load value without waiting for the liquid level deviation to occur, which reflects the forward-looking nature of the control. This forward-looking control is the core concept of the present invention, breaking through the passive response method commonly used in the prior art.

[0045] In addition, step S2.4 effectively solves two key problems in hydrophobic level regulation:

[0046] 1. Liquid level fluctuation caused by load changes: By introducing the predicted load value, the system can sense the load change trend in advance and make pre-adjustments before the liquid level fluctuation occurs, thus reducing the fluctuation amplitude. The rapid load reduction scenario mentioned in the briefing is a typical case. Traditional methods often lead to drastic fluctuations in the liquid level, while the present invention intervenes in advance through the prediction model to significantly reduce the fluctuation amplitude.

[0047] 2. Drain pipe erosion problem: When calculating the liquid level control signal, the fuzzy control algorithm will adaptively adjust the control gain according to the load interval characteristics, avoiding the drastic change of drain flow caused by traditional fixed gain control when the load changes greatly, thereby reducing the erosion of the drain pipe. This adaptive characteristic is the innovation point of the present invention that distinguishes it from the prior art.

[0048] S3: Send the liquid level adjustment control signal to the electric control valve, and adjust the drainage flow of the desalted water heater through the electric control valve.

[0049] S3.1: Convert the liquid level adjustment control signal into the opening control signal of the electric control valve. It should be noted that the opening control signal in the present invention specifically refers to a composite control signal that comprehensively considers the liquid level adjustment requirements and the valve movement characteristics, which is different from the traditional simple opening instruction. The signal contains control parameters such as the valve movement rate and movement mode, so that the actuator can control the valve movement more accurately. The self-calibration mode is an intelligent calibration mechanism specially designed for the desalted water heater drain system. It solves the problem of valve positioning accuracy under drain conditions through reciprocating motion and dynamic parameter update.

[0050] S3.2: Send the opening control signal to the actuator of the electric control valve through the signal transmission line.

[0051] S3.3: The actuator drives the valve movement of the electric control valve to change the drainage flow area of ​​the desalted water heater.

[0052] Specifically, the actuator receives the opening control signal and converts the electrical signal into mechanical motion;

[0053] If the rate of change of the opening control signal exceeds the preset rate of change, the actuator drives the valve to move in a segmented adjustment manner;

[0054] If an increase in resistance is detected during valve movement, the actuator increases the output torque;

[0055] If the deviation between the actual opening value and the opening control signal exceeds the preset deviation value, the actuator enters the self-calibration mode;

[0056] The drain flow area is dynamically adjusted according to the position of the valve movement.

[0057] Furthermore, the self-calibration mode includes the following:

[0058] The actuator records the current valve position as the initial position for calibration;

[0059] The actuator controls the valve to move throughout the entire process and collects the driving parameters of the valve at different positions;

[0060] If the drive parameters are beyond the calibration range, the actuator will reciprocate at that position;

[0061] The actuator compares the drive parameters collected from the reciprocating motion with the preset parameters to generate position compensation values;

[0062] The actuator writes the position compensation value into the control parameter table;

[0063] The actuator is repositioned to the target position corresponding to the opening control signal according to the compensation value in the control parameter table.

[0064] Preferably, step S3.3 creatively proposes a valve motion control strategy based on segmented regulation. Traditional valve control usually adopts a single opening-flow correspondence, while the present invention adopts different control strategies in different opening ranges through segmented regulation. This segmented control method is particularly suitable for the hydrophobic characteristics of desalted water heaters: fine adjustment is used at small openings to prevent steam penetration, and rapid response is emphasized at large openings to cope with load changes. Take a typical working condition as an example: when the system needs to quickly reduce the hydrophobic flow, the segmented regulation mechanism will automatically decompose the valve movement into a rapid approach segment and a fine adjustment segment, effectively avoiding the over-regulation problem in traditional control methods.

[0065] In addition, S3.3 effectively solves two technical problems: First, in response to the erosion problem of the drain pipe, the valve motion control of the present invention introduces a dynamic torque compensation mechanism. When the valve motion resistance increases, the system will promptly increase the output torque to ensure the smoothness of the valve movement. This active compensation mechanism significantly reduces the sudden change in opening caused by valve jamming in the traditional control method, thereby reducing the erosion of the drain pipe.

[0066] Secondly, regarding the control accuracy, the present invention innovatively designs a self-calibration mode. By continuously collecting and updating control parameters during actual operation, the system can adapt to the dynamic changes of the hydrophobic working conditions. This adaptive characteristic enables the valve control to maintain a high positioning accuracy when facing different loads, different temperatures and other working conditions. Practice has proved that after adopting this technology, the valve positioning accuracy is significantly improved, effectively solving the problem of unstable hydrophobic flow control in traditional technology.

[0067] S3.4: Monitor the actual opening value of the electric control valve and feed back the actual opening value to the intelligent controller.

[0068] In summary, the present invention uses a high-precision liquid level sensor to monitor the drain liquid level in real time, combines the intelligent controller and the preset load prediction model to generate a liquid level adjustment control signal, and finally adjusts the drain flow rate through the electric control valve to achieve accurate and rapid adjustment of the drain liquid level. The present invention not only significantly improves the stability of the drain liquid level, reduces the amplitude of liquid level fluctuation, improves the heat exchange efficiency and operation safety of the heater, but also reduces energy consumption and maintenance costs by optimizing the control strategy, and has significant economic and social benefits.

[0069] Embodiment 2 is an embodiment of the present invention, which provides a system for adjusting the drain level of a desalted water heater under different loads, comprising:

[0070] A liquid level detection module, used to detect the deionized water level of the deionized water heater using a liquid level sensor and transmit the detection signal to the intelligent controller;

[0071] The signal generation module is used for the intelligent controller to generate a liquid level adjustment control signal using a preset load prediction model according to the detection signal and the current load data of the unit;

[0072] The flow regulating module is used to send the liquid level regulation control signal to the electric regulating valve, and regulate the drainage flow of the desalted water heater through the electric regulating valve.

[0073] Example 3, reference Figure 2 , is an embodiment of the present invention, which is different from the previous embodiment in that: if the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0074] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0075] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0076] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0077] Example 4 is an embodiment of the present invention, which provides a method for adjusting the drain liquid level of a desalted water heater under different loads. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0078] In order to verify the effectiveness and superiority of the method for adjusting the drain level of a desalted water heater under different loads of the present invention, this embodiment designed a series of theoretical experiments, covering performance tests under various working conditions. In the experiment, this embodiment compared the present invention with four existing technical solutions: a float-type regulating valve, an electric regulating valve, a steam-liquid two-phase flow self-regulating drain valve, and an intelligent control system. The experimental platform includes a simulated desalted water heater system, equipped with key equipment such as a high-precision liquid level sensor, an intelligent controller, and an electric regulating valve. During the experiment, this embodiment simulated the load changes in actual operation by changing the unit load, and recorded and analyzed key indicators such as drain level fluctuations, response time, and energy consumption of each solution under different load conditions. The specific experimental steps are as follows:

[0079] Experimental preparation: Install high-precision liquid level sensors, intelligent controllers and electric control valves on the experimental platform, and ensure that all equipment operates normally.

[0080] Load change simulation: By adjusting the simulated load, it is set to three working conditions: low load (20% rated load), medium load (50% rated load) and high load (80% rated load).

[0081] Data collection: Under each load condition, record the hydrophobic liquid level fluctuation amplitude, response time and energy consumption data of each scheme.

[0082] Data analysis: Perform statistical analysis on the collected data and compare the performance of each solution under different load conditions.

[0083] Table 1: Fluctuation amplitude of hydrophobic liquid level of each scheme under different loads (unit: mm)

[0084]

[0085]

[0086] As shown in Table 1, the hydrophobic liquid level fluctuation amplitudes of the five schemes under different load conditions. It can be seen from the data that the present invention exhibits the smallest liquid level fluctuation amplitude under all load conditions. Specifically, under low load (20% rated load), the liquid level fluctuation amplitude of the present invention is only 3.2mm, which is much lower than other schemes; under medium load (50% rated load), the liquid level fluctuation amplitude is 4.1mm, which is also better than other schemes; under high load (80% rated load), the liquid level fluctuation amplitude is 5.8mm, which is still the lowest. This shows that the present invention can effectively reduce the fluctuation amplitude of the hydrophobic liquid level and improve the stability and safety of the system.

[0087] Table 2: Response time of each solution under different loads (unit: seconds)

[0088] load Float type regulating valve Electric regulating valve Steam-liquid two-phase flow self-regulating steam trap Intelligent control system The present invention 20％ 12.5 6.3 9.1 5.6 2.8 50％ 18.4 8.8 12.3 7.9 3.1 80％ 26.6 12.2 16.5 10.3 4.2

[0089] Table 2 shows the response time of the five solutions under different load conditions. It can be seen from the data that the present invention shows the fastest response time under all load conditions. Specifically, under low load (20% rated load), the response time of the present invention is 2.8 seconds, which is much lower than other solutions; under medium load (50% rated load), the response time is 3.1 seconds, still leading; under high load (80% rated load), the response time is 4.2 seconds, still the fastest. This shows that the present invention can quickly adjust the hydrophobic liquid level when the load changes, reduce the time of liquid level fluctuations, and improve the dynamic response capability of the system.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for adjusting the drain level of a desalted water heater under different loads, characterized in that: include: A liquid level sensor is used to detect the deionized water level of the deionized water heater and transmit the detection signal to the intelligent controller; The intelligent controller generates a liquid level adjustment control signal according to the detection signal and the current load data of the unit using a preset load prediction model; The liquid level adjustment control signal is sent to the electric regulating valve, and the drain flow of the desalted water heater is adjusted by the electric regulating valve.

2. The method for adjusting the drain level of a desalted water heater under different loads according to claim 1, characterized in that: The liquid level sensor is used to detect the deionized water level of the deionized water heater, and the detection signal is transmitted to the intelligent controller, including the following steps: Install a liquid level sensor on the side wall of the desalted water heater; Collecting the hydrophobic liquid level data in the desalted water heater by means of the liquid level sensor; Filtering and amplifying the hydrophobic liquid level data to obtain a hydrophobic liquid level detection signal; The hydrophobic liquid level detection signal is transmitted to the intelligent controller.

3. The method for adjusting the drain level of a desalted water heater under different loads according to claim 2, characterized in that: The intelligent controller generates a liquid level adjustment control signal based on the detection signal and the current load data of the unit using a preset load prediction model, including the following steps: The load prediction model is trained based on the historical operation data of the desalted water heater and stored in the intelligent controller; Comparing the detection signal with a preset hydrophobic liquid level standard value to obtain a liquid level deviation value; Inputting the current load data of the unit into the load prediction model to obtain a predicted load value; Based on the liquid level deviation value and the predicted load value, a liquid level regulation control signal is calculated by a fuzzy control algorithm.

4. The method for adjusting the drain level of a desalted water heater under different loads according to claim 3, characterized in that: Based on the liquid level deviation value and the predicted load value, a liquid level regulation control signal is calculated by a fuzzy control algorithm, comprising the following steps: The liquid level deviation value is fuzzy quantized to obtain a membership value of the liquid level deviation; Dividing the predicted load value according to load levels to obtain load interval identifiers; If the membership value of the liquid level deviation is positive and the load interval is marked as an ascending stage, mapping the membership value of the liquid level deviation to a first adjustment coefficient; If the membership value of the liquid level deviation is negative and the load interval is marked as a descending phase, mapping the membership value of the liquid level deviation to a second adjustment coefficient; If the absolute value of the membership value of the liquid level deviation is greater than a preset threshold and the load interval identifier is in a changing state, mapping the membership value of the liquid level deviation to a third adjustment coefficient; Selecting a corresponding adjustment coefficient according to the priority order of the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient; The adjustment coefficient is multiplied by the reference control amount to obtain the liquid level adjustment control signal.

5. The method for adjusting the drain level of a desalted water heater under different loads according to claim 4, characterized in that: The liquid level adjustment control signal is sent to the electric regulating valve, and the drain flow of the desalted water heater is adjusted by the electric regulating valve, including the following steps: Converting the liquid level adjustment control signal into an opening control signal of the electric regulating valve; Sending the opening control signal to the actuator of the electric regulating valve through a signal transmission line; The actuator drives the valve movement of the electric regulating valve to change the drainage flow area of ​​the desalted water heater; The actual opening value of the electric regulating valve is monitored and the actual opening value is fed back to the intelligent controller.

6. The method for adjusting the drain level of a desalted water heater under different loads according to claim 5, characterized in that: The actuator drives the valve movement of the electric regulating valve to change the drainage flow area of ​​the desalted water heater, including the following steps: The actuator receives the opening control signal and converts the electrical signal into mechanical motion; If the change rate of the opening control signal exceeds the preset change rate, the actuator drives the valve to move in a segmented adjustment manner; If it is detected that there is an increase in resistance during the movement of the valve, the actuator increases the output torque; If the deviation between the actual opening value and the opening control signal exceeds a preset deviation value, the actuator enters a self-calibration mode; The drain flow area is dynamically adjusted according to the position of the valve movement.

7. The method for adjusting the drain level of a desalted water heater under different loads according to claim 6, characterized in that: The self-calibration mode includes the following: The actuator records the current valve position as the initial position for calibration; The actuator controls the valve to move throughout the entire process and collects driving parameters of the valve at different positions; If the driving parameter exceeds the calibration range, the actuator performs reciprocating motion at the position; The actuator compares the driving parameters collected by the reciprocating motion with preset parameters to generate a position compensation value; The actuator writes the position compensation value into a control parameter table; The actuator is repositioned to a target position corresponding to the opening control signal according to the compensation value in the control parameter table.

8. A system for adjusting the drain level of a desalted water heater under different loads, based on the method for adjusting the drain level of a desalted water heater under different loads according to any one of claims 1 to 7, characterized in that: include, A liquid level detection module, used to detect the deionized water level of the deionized water heater using a liquid level sensor and transmit the detection signal to the intelligent controller; A signal generating module, used for the intelligent controller to generate a liquid level regulating control signal using a preset load prediction model according to the detection signal and the current load data of the unit; The flow regulating module is used to send the liquid level regulation control signal to the electric regulating valve, so as to regulate the drainage flow of the desalted water heater through the electric regulating valve.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for adjusting the drain liquid level of a desalted water heater under different loads according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for adjusting the drain liquid level of a desalted water heater under different loads according to any one of claims 1 to 7 are implemented.

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