An adaptive water level control system and control method for a ship seawater evaporation device

Abstract

The present application relates to an adaptive water level control system for a ship seawater evaporation device and a control method thereof. The system integrates a flow display unit, a water level display unit, and a temperature display unit, which are respectively used to display the seawater inlet flow, the seawater evaporation device water level, and the heating steam temperature parameters in real time. These display units not only provide an intuitive monitoring interface, but also enable operators to quickly grasp the operating status of the system; the control unit, as the core of the system, is responsible for receiving signals from various sensors, including selection and control operation signals, water level signals, heating steam temperature signals, seawater inlet flow signals, valve position feedback signals, and intermittent start and stop signals. Based on these signals, the control unit adopts an adaptive control algorithm to comprehensively consider the influence of multiple parameters on water level stability, thereby achieving precise control of the seawater inlet water level regulating valve; the selection and control operation unit allows the operator to select automatic or manual control mode according to actual needs.

Description

Technical Field

[0001] The present application relates to the field of ship water making systems, and in particular to a water level control system and a control method for an adaptive ship seawater evaporation device. Background Art

[0002] A ship's watermaking system desalinates seawater through evaporation and separation, producing freshwater with production and quality indicators that meet requirements. The seawater evaporator is the core equipment in this system. By configuring a water level control system to maintain the water level within a specified range, the evaporator operates safely and safely, producing freshwater with production and quality that meet requirements, while also extending the life of the ship's power plant.

[0003] In related technologies, the water level control system of traditional ship seawater evaporation equipment only uses water level as a single control target, ignoring the dynamic impact of other parameters on water level stability. Its single impulse control effect is poor, reliability is poor, accuracy is low, and there is no parameter display. Summary of the Invention

[0004] The present application provides an adaptive water level control system and control method for a ship seawater evaporation device, which can solve the problems of traditional ship seawater evaporation device water level control systems that only use water level as a single control target, ignore the dynamic influence of other parameters on water level stability, and have poor single impulse control effect, poor reliability, low accuracy, and no parameter display.

[0005] In a first aspect, an embodiment of the present application provides an adaptive water level control system for a ship seawater evaporation device, comprising:

[0006] A control unit, wherein the control unit is connected to a flow display unit, a water level display unit, a temperature display unit, and an intermittent start-stop unit;

[0007] A seawater inlet water level regulating valve, a seawater inlet flow sensor, a seawater evaporation device water level measuring sensor, and a heating steam temperature sensor, wherein the seawater inlet water level regulating valve is connected to the control unit via an electric actuator, the seawater inlet flow sensor is connected to the flow display unit, the seawater evaporation device water level measuring sensor is connected to the water level display unit, and the heating steam temperature sensor is connected to the temperature display unit;

[0008] A selection and control operation unit and a valve position display unit, wherein the selection and control operation unit is connected to the control unit and the electric actuator unit respectively, and the valve position display unit is connected to the control unit and the electric actuator unit respectively;

[0009] The control unit is used to receive the selection and control operation signal, water level signal, heating steam temperature signal, seawater inlet flow signal, valve position feedback signal and intermittent start and stop signal, and adaptively control the water level regulating valve according to the received signals.

[0010] In combination with the first aspect, in one embodiment, the control unit includes a collection unit, a fault judgment unit, a mode operation unit, and a control output unit connected in sequence, the collection unit is connected to a control display unit, and the fault judgment unit and the mode operation unit are connected to an adaptive operation database unit;

[0011] The acquisition unit is connected to the selection and control operation unit, flow display unit, water level display unit, temperature display unit and intermittent start and stop unit, and is used to collect the selection and control operation signal, water level signal, temperature signal, flow signal, valve position feedback signal and intermittent start and stop signal, and transmit the collected signals to the control display unit and the fault judgment unit;

[0012] The fault judgment unit identifies and judges the fault mode and sends it to the adaptive operation database unit. The adaptive operation database performs combination matching and comparison on the fault mode and adaptively selects the control mode according to the fault mode. The mode operation unit performs logical calculation according to the corresponding control mode and transmits the calculated valve position opening control quantity result to the control output unit. The control output unit is connected to the seawater inlet water level regulating valve to complete the control of the seawater inlet water level regulating valve.

[0013] In combination with the first aspect, in one embodiment, the electric actuator includes a remote control unit, a switch control unit, and a valve position feedback unit;

[0014] The remote control unit is connected to the control unit and is used to receive the analog control signal of the control unit and drive the seawater inlet water level regulating valve to operate;

[0015] The switch control unit is connected to the selection and control operation unit, and is used to receive the switch signal of the selection and control operation unit and operate the seawater inlet water level regulating valve;

[0016] The valve position feedback unit is connected to the control unit and is used to send the position signal of the seawater inlet water level regulating valve to the control unit.

[0017] In combination with the first aspect, in one embodiment, the selection and control operation unit includes a selection operator and an operator, the selection operator is connected to the control unit, and the operator is connected to the seawater inlet water level regulating valve;

[0018] The selector is used to select the operating mode of the seawater inlet water level regulating valve, and the operating modes of the seawater inlet water level regulating valve include remote control and automatic; the operator includes an adjustment device for remotely controlling the seawater inlet water level regulating valve.

[0019] In combination with the first aspect, in one embodiment, the water level measurement sensor of the seawater evaporation device includes a magnetostrictive measurement sensor, and the magnetostrictive measurement sensor is connected to the seawater evaporation device via a U-shaped measurement tank;

[0020] The float ball and the sleeve flange of the magnetostrictive measuring sensor are both provided with an anti-corrosion layer, the measuring rod and the outer cover of the magnetostrictive measuring sensor are both made of stainless steel, and the locking ring of the magnetostrictive measuring sensor is made of polytetrafluoroethylene material.

[0021] In a second aspect, an embodiment of the present application provides a control method for a water level control system of an adaptive ship seawater evaporation device as described in some of the above embodiments, comprising the following steps:

[0022] Collect and display the water level, heating steam temperature, seawater inlet flow, and valve position feedback signals of the seawater evaporation device, collect the selection and control operator signals, and intermittent start and stop unit signals, and output the results to the control unit;

[0023] If it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the temperature compensation coefficient is set according to the measured value of the heating steam temperature, and the flow correction coefficient is set according to the measured value of the seawater inlet flow;

[0024] If the water level is judged to be within the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit will dynamically select the humanoid point control mode, and calculate based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient and flow correction coefficient. The calculated valve position opening control quantity result will be transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

[0025] In conjunction with the second aspect, in one embodiment, after setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes:

[0026] If it is determined that the heating steam temperature sensor or the seawater inlet flow sensor has failed, the control unit will dynamically select the first-order integral characteristic transfer function water level control mode according to the fault status, and perform calculations based on the water level, heating steam temperature or seawater inlet flow, temperature compensation coefficient or correction coefficient. The calculated valve position opening control quantity result will be transmitted to the electric actuator unit to keep the seawater inlet water level regulating valve at the appropriate valve position.

[0027] In conjunction with the second aspect, in one embodiment, after setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes:

[0028] If it is determined that the water level measurement sensor of the seawater evaporation device or the seawater inlet water level regulating valve has failed, the control unit will dynamically select the control output lock control mode according to the fault status, select the seawater inlet water level regulating valve output lock to maintain the current position, and prompt the operator to switch to remote control.

[0029] In conjunction with the second aspect, in one embodiment, after setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes:

[0030] If the water level is judged to be higher than the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit is used to set the high water level warning and the high water level correction coefficient, and the control unit is used to dynamically select the variable weight predictive control mode. The calculation is based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient and high water level correction coefficient, and the calculated valve position opening control quantity result is transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

[0031] In conjunction with the second aspect, in one embodiment, after setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes:

[0032] If the water level is judged to be lower than the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit is used to set the low water level warning and low water level correction coefficient, and the control unit is used to dynamically select the variable weight predictive control mode. The calculation is based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient and low water level correction coefficient, and the calculated valve position opening control quantity result is transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

[0033] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0034] The improved system not only monitors the water level, but also monitors the heating steam temperature, seawater inlet flow rate and valve position feedback parameters. These parameters are collected in real time through their respective sensors (such as heating steam temperature sensor, seawater inlet flow rate sensor, seawater evaporation device water level measurement sensor, etc.) and are respectively connected to corresponding display units (such as temperature display unit, flow display unit, water level display unit) for operator monitoring. The valve position display unit displays the current valve position of the seawater inlet water level regulating valve in real time, providing an intuitive monitoring method for the operator; the control unit receives signals from various sensors and performs adaptive control based on these signals. The adaptive control strategy takes into account the influence of parameters such as heating steam temperature and seawater inlet flow rate on water level stability, so it can more accurately adjust the valve position of the seawater inlet water level regulating valve; the control unit also adjusts the control strategy according to the selective control operation signal and intermittent start and stop signal to adapt to different operating modes and operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a schematic diagram of the structure of the water level control system of the adaptive ship seawater evaporation device;

[0037] Figure 2 This is a structural diagram of the control unit of the water level control system of the adaptive ship seawater evaporation device. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The embodiments of the present application provide an adaptive water level control system and control method for a ship seawater evaporation device, which can solve the problems of traditional ship seawater evaporation device water level control systems that only use water level as a single control target, ignore the dynamic influence of other parameters on water level stability, and have poor single impulse control effect, poor reliability, low accuracy, and no parameter display.

[0040] First, as Figure 1 and Figure 2 As shown, an embodiment of the present application provides an adaptive ship seawater evaporation device water level control system, which includes: a control unit, the control unit is connected to a flow display unit, a water level display unit, a temperature display unit and an intermittent start-stop unit; a seawater inlet water level regulating valve, a seawater inlet flow sensor, a seawater evaporation device water level measuring sensor and a heating steam temperature sensor, the seawater inlet water level regulating valve is connected to the control unit via an electric actuator, the seawater inlet flow sensor is connected to the flow display unit, the seawater evaporation device water level measuring sensor is connected to the water level display unit, and the heating steam temperature sensor is connected to the temperature display unit; a selection and control operation unit and a valve position display unit, the selection and control operation unit is respectively connected to the control unit and the electric actuator, and the valve position display unit is respectively connected to the control unit and the electric actuator; the control unit is used to receive a selection and control operation signal, a water level signal, a heating steam temperature signal, a seawater inlet flow signal, a valve position feedback signal and an intermittent start-stop signal, and adaptively control the water level regulating valve according to the received signals.

[0041] In this embodiment, the system integrates a flow display unit, a water level display unit, and a temperature display unit, which are respectively used to display the seawater inlet flow rate, the seawater evaporation device water level, and the heating steam temperature parameters in real time. These display units not only provide an intuitive monitoring interface, but also enable operators to quickly understand the operating status of the system. The control unit, as the core of the system, is responsible for receiving signals from various sensors, including selection and control operation signals, water level signals, heating steam temperature signals, seawater inlet flow rate signals, valve position feedback signals, and intermittent start and stop signals. Based on these signals, the control unit adopts an adaptive control algorithm to comprehensively consider the impact of multiple parameters on water level stability, thereby achieving precise control of the seawater inlet water level regulating valve.

[0042] The selective control operation unit allows the operator to select automatic or manual control mode according to actual needs, improving the flexibility and operability of the system; the valve position display unit displays the current valve position of the seawater inlet water level regulating valve in real time, providing the operator with an intuitive valve position monitoring method, facilitating precise operation and adjustment; the intermittent start-stop unit automatically adjusts the start and stop status of the seawater evaporation device according to the system's operating requirements and working conditions, helping to save energy and reduce consumption and improve the system's energy efficiency.

[0043] In combination with the first aspect, in one embodiment, the control unit includes an acquisition unit, a fault judgment unit, a mode operation unit and a control output unit connected in sequence, the acquisition unit is connected to a control display unit, and the fault judgment unit and the mode operation unit are connected to an adaptive operation database unit; the acquisition unit is connected to the selection and control operation unit, the flow display unit, the water level display unit, the temperature display unit and the intermittent start and stop unit, and is used to collect selection and control operation signals, water level signals, temperature signals, flow signals, valve position feedback signals and intermittent start and stop signals, and transmit the collected signals to the control display unit and the fault judgment unit; the fault judgment unit identifies and judges the fault mode and sends it to the adaptive operation database unit, the adaptive operation database performs a combination matching comparison on the fault mode and adaptively selects the control mode according to the fault mode, the mode operation unit performs logical calculation according to the corresponding control mode, and transmits the calculated valve position opening control quantity result to the control output unit, the control output unit is connected to the seawater inlet water level regulating valve to complete the control of the seawater inlet water level regulating valve.

[0044] In this embodiment, the acquisition unit establishes connections with the selection and control unit, flow display unit, water level display unit, temperature display unit, and intermittent start and stop unit through physical or wireless connections. These units provide selection and control operation signals, water level signals, temperature signals, flow signals, valve position feedback signals, and intermittent start and stop signals, respectively. The acquisition unit digitizes these signals and prepares them for further transmission.

[0045] The control and display unit is responsible for displaying the signals collected by the acquisition unit to the operator in a visual form for easy monitoring and adjustment. The control and display unit integrates a display screen and an interactive interface device, which can display the status of various parameters in real time, such as water level, temperature, flow, etc., and provide an operation interface for the operator to input control instructions; the fault judgment unit analyzes the collected signals to determine whether there is a fault mode in the system. The fault judgment unit contains a set of predefined fault mode libraries, which can be compared with the collected signals to identify whether the system is currently in a certain fault state. Once a fault is detected, the fault judgment unit will send relevant information to the adaptive operation database unit; the adaptive operation database unit stores a variety of control modes and fault handling strategies for use in accordance with the results of the fault judgment unit. Adaptive selection, the adaptive operation database unit is an intelligent system based on the database, which can search and match the corresponding control mode and fault handling strategy in the database according to the received fault mode information. These strategies and modes can be pre-set through historical data and expert experience; the mode operation unit performs logical calculations based on the control mode selected by the adaptive operation database unit to determine the valve position opening control quantity of the seawater inlet water level regulating valve. The mode operation unit adopts control algorithms and mathematical models to achieve precise control of the seawater inlet water level regulating valve. These algorithms and models can calculate the optimal valve position opening according to the current system status and control objectives; the control output unit converts the valve position opening control quantity calculated by the mode operation unit into an actual execution signal and sends it to the seawater inlet water level regulating valve.

[0046] In combination with the first aspect, in one embodiment, the electric actuator unit includes a remote control unit, a switch control unit and a valve position feedback unit; the remote control unit is connected to the control unit, and is used to receive the analog control signal of the control unit and drive the seawater inlet water level regulating valve to operate; the switch control unit is connected to the selection and control operation unit, and is used to receive the switch signal of the selection and control operation unit and operate the seawater inlet water level regulating valve; the valve position feedback unit is connected to the control unit, and is used to send the position signal of the seawater inlet water level regulating valve to the control unit.

[0047] In this embodiment, the remote control unit is responsible for receiving analog control signals from the control unit. These analog signals usually represent the desired opening or position of the seawater inlet water level regulating valve. The remote control unit is connected to the control unit through a signal line or wirelessly. When the control unit calculates the appropriate valve position opening, it will send an analog signal to the remote control unit. After receiving the control signal, the remote control unit will drive the motor or other actuators to adjust the opening of the seawater inlet water level regulating valve; the switch control unit is used to receive switch signals from the selection and control operation unit. These signals are usually binary (on / off) and are used to quickly control the opening or closing of the valve in an emergency or in a specific operating mode. The switch control unit is connected to the selection and control operation unit and can be connected by hard wire or wirelessly. In line mode, when the operator sends a switch signal through the selection and control operation unit, the switch control unit will immediately respond and operate the seawater inlet water level regulating valve. The switch control unit provides a fast and direct way to control the valve, which is especially important in emergency situations, such as when the system detects water level abnormalities or equipment failures; the valve position feedback unit is responsible for monitoring the actual position of the seawater inlet water level regulating valve and sending this position signal back to the control unit. The valve position feedback unit may monitor the valve opening or position through sensors (such as position sensors, rotary encoders or linear displacement sensors). The monitored position signal is converted into an electrical signal and sent back to the control unit through a signal line or wirelessly. The control unit uses this feedback signal to evaluate the current control effect and adjust the control strategy as needed.

[0048] In combination with the first aspect, in one embodiment, the selection and control operation unit includes a selector and an operator, the selector is connected to the control unit, and the operator is connected to the seawater inlet water level regulating valve; the selector is used to select the operating mode of the seawater inlet water level regulating valve, and the operating mode of the seawater inlet water level regulating valve includes remote control and automatic; the operator includes a control for remotely controlling the adjustment of the seawater inlet water level regulating valve.

[0049] In this embodiment, the selector's primary function is to select the operating mode of the seawater inlet water level regulating valve. These operating modes typically include remote control and automatic modes. The remote control mode allows an operator to remotely control the valve's operation via external commands, while the automatic mode causes the valve to automatically adjust its opening according to a preset control strategy. The selector communicates with the control unit via an electrical or digital communication connection. The selector receives operating mode selection commands sent by the control unit, and sets the valve's operating mode accordingly. The selector also provides feedback to the control unit regarding the currently selected operating mode. In remote control mode, the selector receives external control commands (e.g., from the control unit or other remote control device) and converts these commands into valve-actuating commands, including valve opening and opening speed parameters. The selector is directly connected to the actuator (e.g., an electric motor, hydraulic cylinder, etc.) of the seawater inlet water level regulating valve. Remote control commands received by the selector are converted into corresponding drive signals and transmitted to the actuator to control the valve's operation. The selector is also equipped with a position sensor or encoder for real-time monitoring of the valve's opening and providing feedback to the control unit.

[0050] In combination with the first aspect, in one embodiment, the water level measuring sensor of the seawater evaporation device includes a magnetostrictive measuring sensor, which is connected to the seawater evaporation device via a U-shaped measuring tank; the float and sleeve flange of the magnetostrictive measuring sensor are both provided with an anti-corrosion layer, the measuring rod and outer cover of the magnetostrictive measuring sensor are both made of stainless steel, and the locking ring of the magnetostrictive measuring sensor is made of polytetrafluoroethylene material.

[0051] In this embodiment, a magnetostrictive measuring sensor uses internal non-contact measurement and control technology to accurately detect the absolute position of a movable magnetic ring to measure the actual displacement (or liquid level) of the product being measured. It features high precision, high reliability, long life, and strong environmental adaptability, making it ideal for water level measurement in seawater evaporation systems. A U-shaped measuring canister connects the seawater evaporation system and the magnetostrictive measuring sensor, sealing off the gas to prevent air ingress and acting as an isobarometer to indicate whether the pressures at both ends of the liquid surface are equal. The U-shaped canister also stabilizes measurement and reduces fluctuations caused by external factors. Because seawater is highly corrosive, an anti-corrosion coating is necessary on the float and sleeve flange of the magnetostrictive measuring sensor to protect it from corrosion and extend its service life. Stainless steel is chosen for the measuring rod and housing due to its excellent corrosion resistance and mechanical strength, making it suitable for use in highly corrosive media such as seawater. Polytetrafluoroethylene (PTFE), a high-performance plastic with excellent corrosion resistance and high-temperature resistance, is suitable for components such as the locking ring.

[0052] In a second aspect, an embodiment of the present application provides a control method for a water level control system of an adaptive ship seawater evaporation device as described in the above embodiment, comprising the following steps:

[0053] S100: Collect and display the water level, heating steam temperature, seawater inlet flow, and valve position feedback signals of the seawater evaporation device, collect the selection and control operator signals, and the intermittent start and stop unit signals, and output the results to the control unit;

[0054] S200: If it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, a temperature compensation coefficient is set according to the measured value of the heating steam temperature, and a flow correction coefficient is set according to the measured value of the seawater inlet flow rate;

[0055] S300: If it is determined that the water level is within the specified range and that the water level control system of the seawater evaporation device has no faults, the control unit is used to dynamically select the humanoid point control mode, and based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient and flow correction coefficient, a calculation is performed, and the calculated valve position opening control value result is transmitted to the electric actuator unit to set the seawater inlet water level regulating valve to the appropriate valve position.

[0056] In this embodiment, S100 first collects the key parameters of the seawater evaporation device, such as the water level, heating steam temperature, seawater inlet flow rate, and valve position feedback signal. At the same time, it also collects the selection and control operator signal and the intermittent start-stop unit signal, and outputs all this information to the control unit. This step ensures that the system can obtain all necessary operating data and provides a basis for subsequent control decisions; S200 will determine whether the intermittent start-stop unit is in operation and whether the selection and control operation unit is in automatic mode. At the same time, it will also check whether the heating steam temperature is not lower than the set value. Only when these conditions are met will the temperature compensation coefficient be set according to the measured value of the heating steam temperature, and the temperature compensation coefficient will be set according to the measured value of the seawater inlet flow rate. The flow correction coefficient is set to the value. This step is to ensure that the system operates under appropriate conditions. When the water level of S300 is within the specified range and there is no fault in the water level control system of the seawater evaporation device, the control unit dynamically selects the human-like point-to-point control mode. This mode simulates human operating habits and experience, and performs comprehensive calculations based on the current water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient and flow correction coefficient. The calculation result is transmitted to the electric actuator as the valve position opening control quantity to accurately adjust the valve position of the seawater inlet water level regulating valve, so as to maintain the water level within the specified range. The human-like point-to-point control mode simulates human operating habits and experience, and can achieve more flexible and intelligent water level control.

[0057] In conjunction with the second aspect, in one embodiment, after S200, the following steps are further included:

[0058] S400: If it is determined that the heating steam temperature sensor or the seawater inlet flow sensor fails, the control unit dynamically selects the first-order integral characteristic transfer function water level control mode according to the fault status, and performs calculations based on the water level, heating steam temperature or seawater inlet flow, temperature compensation coefficient or correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to keep the seawater inlet water level regulating valve at the appropriate valve position.

[0059] In this embodiment, if a failure of the heating steam temperature sensor or the seawater inlet flow sensor is detected, the system uses a control unit to dynamically select a first-order integral characteristic transfer function water level control mode. In this mode, the system calculates the valve position control variable based on the currently available water level data, the heating steam temperature or seawater inlet flow data (if the corresponding sensor is not faulty), the temperature compensation coefficient, and the flow correction coefficient (if the corresponding sensor is not faulty). The calculated valve opening control variable is transmitted to the electric actuator to adjust the valve position of the seawater inlet water level regulating valve to maintain the water level within an appropriate range. The first-order integral characteristic transfer function control mode helps the system maintain stable water level control performance in the face of sensor failure. The integral characteristic smoothes the control output and reduces system fluctuations caused by sensor failure.

[0060] In conjunction with the second aspect, in one embodiment, after S200, the following steps are further included:

[0061] S500: If it is determined that the water level measurement sensor of the seawater evaporation device or the seawater inlet water level regulating valve has failed, the control unit is used to dynamically select the control output lock control mode according to the fault status, and select the seawater inlet water level regulating valve output lock to maintain the current position, and prompt the operator to switch to remote control.

[0062] In this embodiment, the system continuously monitors the working status of the water level measurement sensor of the seawater evaporation device and the seawater inlet water level regulating valve. Once a failure of the above sensor or regulating valve is detected, the control unit will immediately switch to the control output locking control mode. In this mode, the output of the seawater inlet water level regulating valve will be locked to maintain its current position unchanged to ensure the stability of the system. At the same time, the system will issue an alarm to the operator, prompting them to switch to remote control mode for further fault diagnosis and processing.

[0063] In conjunction with the second aspect, in one embodiment, after S200, the following steps are further included:

[0064] S600: If it is determined that the water level is higher than the specified range and that there is no fault in the water level control system of the seawater evaporation device, the control unit is used to set a high water level warning and a high water level correction coefficient, and the control unit is used to dynamically select a variable weight predictive control mode. Calculations are performed based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient, and high water level correction coefficient. The calculated valve position opening control value is transmitted to the electric actuator to position the seawater inlet water level regulating valve at an appropriate valve position.

[0065] In this embodiment, the system continuously monitors water level data. If the water level is determined to be above the upper limit of a specified range and the seawater evaporation unit water level control system is confirmed to be fault-free, the control unit performs the following operations: sets a high water level warning to notify the operator, sets a high water level correction coefficient to adjust the control strategy to cope with the high water level, and dynamically selects a variable weight predictive control mode. This mode calculates the valve position control variable based on the current water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow rate correction coefficient, and the newly set high water level correction coefficient. The calculated valve position control variable is transmitted to the electric actuator to adjust the seawater inlet water level regulating valve to the appropriate valve position, thereby lowering the water level. Compared to other control modes, the variable weight predictive control mode generally has higher control accuracy. It comprehensively considers multiple influencing factors and accurately calculates them based on real-time measurements of these factors, thereby obtaining a more accurate valve position control variable.

[0066] In conjunction with the second aspect, in one embodiment, after S200, the following steps are further included:

[0067] S700: If the water level is judged to be lower than the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit is used to set the low water level warning and low water level correction coefficient, and the control unit is used to dynamically select the variable weight predictive control mode. The calculation is based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient and low water level correction coefficient, and the calculated valve position opening control quantity result is transmitted to the electric actuator to make the seawater inlet water level regulating valve at the appropriate valve position.

[0068] In this embodiment, the system can monitor water level data in real time and issue a warning in a timely manner when the water level drops abnormally, notifying operators to pay attention. By setting a low water level correction coefficient, the system can adjust the control strategy to more effectively respond to low water level conditions. The variable weight predictive control mode can be dynamically adjusted based on multiple parameters to achieve more accurate water level control. Once a water level anomaly is detected, the system can respond quickly and raise the water level by adjusting the valve position of the seawater inlet water level regulating valve to ensure the stability and safety of the system.

[0069] In combination with the second aspect, in one implementation, S300 , S400 , S500 , S600 and S700 are performed in no particular order.

[0070] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0071] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0072] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An adaptive water level control system for a ship seawater evaporation device, characterized in that: It includes: A control unit, wherein the control unit is connected to a flow display unit, a water level display unit, a temperature display unit, and an intermittent start-stop unit; A seawater inlet water level regulating valve, a seawater inlet flow sensor, a seawater evaporation device water level measuring sensor, and a heating steam temperature sensor, wherein the seawater inlet water level regulating valve is connected to the control unit via an electric actuator, the seawater inlet flow sensor is connected to the flow display unit, the seawater evaporation device water level measuring sensor is connected to the water level display unit, and the heating steam temperature sensor is connected to the temperature display unit; A selection and control operation unit and a valve position display unit, wherein the selection and control operation unit is connected to the control unit and the electric actuator unit respectively, and the valve position display unit is connected to the control unit and the electric actuator unit respectively; The control unit is used to receive the selection and control operation signal, water level signal, heating steam temperature signal, seawater inlet flow signal, valve position feedback signal and intermittent start and stop signal, and perform adaptive control on the water level regulating valve according to the received signals; The control unit includes a collection unit, a fault judgment unit, a mode operation unit and a control output unit connected in sequence, the collection unit is connected to a control display unit, and the fault judgment unit and the mode operation unit are connected to an adaptive operation database unit; The acquisition unit is connected to the selection and control operation unit, flow display unit, water level display unit, temperature display unit and intermittent start and stop unit, and is used to collect the selection and control operation signal, water level signal, temperature signal, flow signal, valve position feedback signal and intermittent start and stop signal, and transmit the collected signals to the control display unit and the fault judgment unit; The fault judgment unit identifies and judges the fault mode and sends it to the adaptive operation database unit. The adaptive operation database performs combination matching and comparison on the fault mode and adaptively selects the control mode according to the fault mode. The mode operation unit performs logical calculation according to the corresponding control mode and transmits the calculated valve position opening control quantity result to the control output unit. The control output unit is connected to the seawater inlet water level regulating valve to complete the control of the seawater inlet water level regulating valve.

2. The adaptive water level control system for a ship seawater evaporation device according to claim 1, characterized in that: The electric actuator unit includes a remote control unit, a switch control unit and a valve position feedback unit; The remote control unit is connected to the control unit and is used to receive the analog control signal of the control unit and drive the seawater inlet water level regulating valve to operate; The switch control unit is connected to the selection and control operation unit, and is used to receive the switch signal of the selection and control operation unit and operate the seawater inlet water level regulating valve; The valve position feedback unit is connected to the control unit and is used to send the position signal of the seawater inlet water level regulating valve to the control unit.

3. The adaptive water level control system for a ship seawater evaporation device according to claim 1, characterized in that: The control operation unit includes a selector and an operator, the selector is connected to the control unit, and the operator is connected to the seawater inlet water level regulating valve; The selector is used to select the operating mode of the seawater inlet water level regulating valve, and the operating modes of the seawater inlet water level regulating valve include remote control and automatic; the operator includes an adjustment device for remotely controlling the seawater inlet water level regulating valve.

4. The adaptive water level control system for a ship seawater evaporation device according to claim 1, characterized in that: The water level measuring sensor of the seawater evaporation device includes a magnetostrictive measuring sensor, and the magnetostrictive measuring sensor is connected to the seawater evaporation device via a U-shaped measuring tank; The float ball and the sleeve flange of the magnetostrictive measuring sensor are both provided with an anti-corrosion layer, the measuring rod and the outer cover of the magnetostrictive measuring sensor are both made of stainless steel, and the locking ring of the magnetostrictive measuring sensor is made of polytetrafluoroethylene material.

5. A control method for a water level control system of an adaptive ship seawater evaporation device according to any one of claims 1 to 4, characterized in that: It includes the following steps: Collect and display the water level, heating steam temperature, seawater inlet flow, and valve position feedback signals of the seawater evaporation device, collect the selection and control operator signals, and intermittent start and stop unit signals, and output the results to the control unit; If it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the temperature compensation coefficient is set according to the measured value of the heating steam temperature, and the flow correction coefficient is set according to the measured value of the seawater inlet flow; If the water level is judged to be within the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit will dynamically select the humanoid point control mode, and calculate based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient and flow correction coefficient. The calculated valve position opening control quantity result will be transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

6. The control method of the water level control system of the adaptive ship seawater evaporation device according to claim 5, characterized in that: After setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes: If it is determined that the heating steam temperature sensor or the seawater inlet flow sensor has failed, the control unit will dynamically select the first-order integral characteristic transfer function water level control mode according to the fault status, and perform calculations based on the water level, heating steam temperature or seawater inlet flow, temperature compensation coefficient or correction coefficient. The calculated valve position opening control quantity result will be transmitted to the electric actuator unit to keep the seawater inlet water level regulating valve at the appropriate valve position.

7. The control method of the water level control system of the adaptive ship seawater evaporation device according to claim 5, characterized in that: After setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes: If it is determined that the water level measurement sensor of the seawater evaporation device or the seawater inlet water level regulating valve has failed, the control unit will dynamically select the control output lock control mode according to the fault status, select the seawater inlet water level regulating valve output lock to maintain the current position, and prompt the operator to switch to remote control.

8. The control method of the water level control system of the adaptive ship seawater evaporation device according to claim 5, characterized in that: After setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes: If the water level is judged to be higher than the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit is used to set the high water level warning and the high water level correction coefficient, and the control unit is used to dynamically select the variable weight predictive control mode. The calculation is based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient and high water level correction coefficient, and the calculated valve position opening control quantity result is transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

9. The control method of the water level control system of the adaptive ship seawater evaporation device according to claim 5, characterized in that: After setting the temperature compensation coefficient based on the measured value of the heating steam temperature and the flow correction coefficient based on the measured value of the seawater inlet flow if it is determined that the intermittent start-stop unit is in operation, the selective control operation unit is in automatic mode, and the heating steam temperature is not lower than the set value, the method further includes: If the water level is judged to be lower than the specified range and the water level control system of the seawater evaporation device is judged to have no faults, the control unit is used to set the low water level warning and low water level correction coefficient, and the control unit is used to dynamically select the variable weight predictive control mode. The calculation is based on the water level, heating steam temperature, seawater inlet flow, temperature compensation coefficient, flow correction coefficient and low water level correction coefficient, and the calculated valve position opening control quantity result is transmitted to the electric actuator unit to make the seawater inlet water level regulating valve at the appropriate valve position.

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