Self-adaptive ship seawater evaporation device water level control system and control method thereof

Abstract

The invention relates to a self-adaptive ship seawater evaporation device water level control system and a control method thereof.The system integrates a flow display unit, a water level display unit and a temperature display unit which are used for displaying seawater inlet flow, seawater evaporation device water level and heating steam temperature parameters in real time respectively; the display units not only provide a visual monitoring interface, but also enable an operator to quickly master the running state of the system; the control unit serves as the core of the system and is responsible for receiving signals from all the sensors, the signals comprise a selective 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 based on the signals, the control unit adopts a self-adaptive control algorithm to start and stop the seawater. The influence of a plurality of parameters on the water level stability is comprehensively considered, so that the seawater inlet water level regulating valve is accurately controlled; and the selective control operation unit allows an operator to select an automatic or manual control mode according to actual requirements.

Description

Technical Field

[0001] This application relates to the field of ship water-making systems, and particularly to an adaptive water level control system for a ship seawater evaporation device and its control method. Background Art

[0002] A ship water-making system conducts desalination treatment such as evaporation and separation of seawater to produce fresh water with both output and water quality indicators meeting requirements. The seawater evaporation device is the core equipment of the water-making system. By setting a water level control system for the seawater evaporation device, the water level of the seawater evaporation device is maintained within a specified range, so that the seawater evaporation device can operate normally and safely, produce fresh water with both output and water quality meeting requirements, and at the same time extend the service life of the ship power plant.

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

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

[0005] In a first aspect, an embodiment of this application provides an adaptive water level control system for a ship seawater evaporation device, which includes: A control unit, which is connected with 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 through an electric actuator unit. 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. The heating steam temperature sensor is connected to the temperature display unit; A selective control operation unit and a valve position display unit. The selective control operation unit is respectively connected to the control unit and the electric actuator unit. The valve position display unit is respectively connected to the control unit and the electric actuator unit; The control unit is configured to receive a selective 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 perform adaptive control on the water level regulating valve according to the received signals.

[0006] 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 that are 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 collection unit is connected to the selective control operation unit, the flow display unit, the water level display unit, the temperature display unit, and the intermittent start / stop unit. It is used to collect selective control operation signals, water level signals, temperature signals, flow signals, valve position feedback signals, and intermittent start / stop signals, and transmit the collected signals to the control display unit and the fault judgment unit; The fault judgment unit discriminates and judges the fault mode and sends it to the adaptive operation database unit. The adaptive operation database performs combined 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 amount 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.

[0007] 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 selective control operation unit and is used to receive the switching quantity signal of the selective control operation unit and operate the seawater inlet water level regulating valve to act; 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.

[0008] In combination with the first aspect, in one embodiment, the selective 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 operation mode of the seawater inlet water level regulating valve. The operation modes of the seawater inlet water level regulating valve include remote control and automatic. The operator includes the adjustment for remotely controlling the seawater inlet water level regulating valve.

[0009] In combination with the first aspect, in one embodiment, the water level measurement sensor of the seawater evaporation device includes a magnetostrictive measurement sensor. The magnetostrictive measurement sensor is communicated with the seawater evaporation device through a U-shaped measurement tank; The float ball and the casing flange of the magnetostrictive measurement sensor are both provided with an anti-corrosion layer. The measuring rod and the outer cover of the magnetostrictive measurement sensor are both made of stainless steel, and the locking ring of the magnetostrictive measurement sensor is made of polytetrafluoro material.

[0010] In a second aspect, an embodiment of the present application provides a control method for an adaptive water level control system of a ship seawater evaporation device as described in some of the above embodiments, which includes the following steps: Collect and display the water level of the seawater evaporation device, the heating steam temperature, the seawater inlet flow rate, and the valve position feedback signal, collect the selected control operator signal and the intermittent start-stop unit signal, and output the results to the control unit; If it is determined that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature, and set the flow correction coefficient according to the measured value of the seawater inlet flow rate; If it is determined that the water level is within the specified range and it is determined that there is no fault in the seawater evaporation device water level control system, then the control unit dynamically selects the humanoid point operation control mode, and calculates based on the water level, the heating steam temperature, the seawater inlet flow rate, the temperature compensation coefficient, and the flow correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at an appropriate valve position.

[0011] Combined with the second aspect, in an implementation manner, after the step of if it is determined that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature, and set the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is determined that the heating steam temperature sensor or the seawater inlet flow rate sensor fails, then the control unit dynamically selects the first-order integral characteristic transfer function water level control mode according to the fault state, and calculates based on the water level, the heating steam temperature or the seawater inlet flow rate, the temperature compensation coefficient or the correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at an appropriate valve position.

[0012] Combined with the second aspect, in an implementation manner, after the step of if it is determined that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature, and set the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is determined that a fault has occurred in the water level measurement sensor of the seawater evaporation device or the seawater inlet water level regulating valve, the control unit dynamically selects a control output lock control mode according to the fault status, selects the seawater inlet water level regulating valve output lock to maintain the existing position, and prompts the operator to switch to remote control.

[0013] Combined with the second aspect, in an embodiment, if it is determined that the intermittent start-stop unit is in operation, the selection control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, after setting the temperature compensation coefficient according to the measured value of the heating steam temperature and setting the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is determined that the water level is higher than the specified range and it is determined that there is no fault in the seawater evaporation device water level control system, the control unit sets a high water level warning and a high water level correction coefficient, and the control unit dynamically selects a variable weight prediction control mode, calculates based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow correction coefficient, and high water level correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

[0014] Combined with the second aspect, in an embodiment, if it is determined that the intermittent start-stop unit is in operation, the selection control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, after setting the temperature compensation coefficient according to the measured value of the heating steam temperature and setting the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is determined that the water level is lower than the specified range and it is determined that there is no fault in the seawater evaporation device water level control system, the control unit sets a low water level warning and a low water level correction coefficient, and the control unit dynamically selects a variable weight prediction control mode, calculates based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow correction coefficient, and low water level correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

[0015] The beneficial effects brought by the technical solution provided by the embodiments of the present application include: The improved system not only monitors the water level, but also simultaneously monitors the heating steam temperature, the seawater inlet flow rate, and the valve position feedback parameters. These parameters are collected in real time through their respective sensors (such as heating steam temperature sensors, seawater inlet flow rate sensors, seawater evaporation device water level measurement sensors, etc.) and are respectively connected to the corresponding display units (such as temperature display units, flow rate display units, water level display units) for operators to monitor. 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 means for operators; the control unit receives signals from each sensor 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 the water level stability, so it can more precisely adjust the valve position of the seawater inlet water level regulating valve; the control unit also adjusts the control strategy according to the selected control operation signal and the intermittent start-stop signal to adapt to different operation modes and operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 FIG. is a schematic structural diagram of an adaptive water level control system for a ship's seawater evaporation device; Figure 2 FIG. is a schematic structural diagram of the control unit of an adaptive water level control system for a ship's seawater evaporation device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to enable those skilled in the art to better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0019] The embodiments of the present application provide an adaptive water level control system for a ship's seawater evaporation device and its control method, which can solve the problems that the traditional water level control system for a ship's seawater evaporation device only takes the water level as a single control target, ignores the dynamic influence of other parameters on the water level stability, has poor single-impulse control effect, poor reliability, low precision, and no parameter display.

[0020] In the first aspect, as Figure 1 and Figure 2As shown in the figure, an adaptive water level control system for a ship seawater evaporation device provided by an embodiment of the present application includes: a control unit, which 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 measurement sensor, and a heating steam temperature sensor. The seawater inlet water level regulating valve is connected to the control unit through an electric actuator unit. The seawater inlet flow sensor is connected to the flow display unit. The seawater evaporation device water level measurement sensor is connected to the water level display unit. The heating steam temperature sensor is connected to the temperature display unit; a selected control operation unit and a valve position display unit. The selected control operation unit is respectively connected to the control unit and the electric actuator unit. The valve position display unit is respectively connected to the control unit and the electric actuator unit. The control unit is configured to receive a selected 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 perform adaptive control on the water level regulating valve according to the received signals.

[0021] 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, 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 state of the system. As the core of the system, the control unit is responsible for receiving signals from various sensors, including a selected 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. Based on these signals, the control unit adopts an adaptive control algorithm, comprehensively considering the influence of multiple parameters on water level stability, so as to achieve precise control of the seawater inlet water level regulating valve. The selected control operation unit allows operators to select automatic or manual control modes 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 an intuitive valve position monitoring means for operators, facilitating precise operation and adjustment. The intermittent start-stop unit automatically adjusts the start-stop state of the seawater evaporation device according to the operating requirements and working conditions of the system, helping to save energy and improve the energy efficiency of the system.

[0022] 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 that are 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 collection unit is connected to the selective control operation unit, the flow rate display unit, the water level display unit, the temperature display unit, and the intermittent start / stop unit, and is used to collect selective control operation signals, water level signals, temperature signals, flow rate signals, valve position feedback signals, and intermittent start / stop signals, and transmit the collected signals to the control display unit and the fault judgment unit; the fault judgment unit discriminates and judges the fault mode, and sends it to the adaptive operation database unit. The adaptive operation database performs combined matching comparison on the fault mode, 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.

[0023] In this embodiment, the collection unit establishes connections with the selective control operation unit, the flow rate display unit, the water level display unit, the temperature display unit, and the intermittent start / stop unit through physical connection or wireless communication. These units respectively provide selective control operation signals, water level signals, temperature signals, flow rate signals, valve position feedback signals, and intermittent start / stop signals. The collection unit digitizes these signals and prepares for further transmission; The control and display unit is responsible for presenting 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 devices such as a display screen and an interactive interface, which can display the status of various parameters in real time, such as water level, temperature, flow rate, etc., and provides 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 predefined fault mode library inside, and by comparing with the collected signals, it identifies whether the system is currently in a certain fault state. Once a fault is detected, the fault judgment unit will send the relevant information to the adaptive operation database unit; the adaptive operation database unit stores various control modes and fault handling strategies, which are used for adaptive selection according to the results of the fault judgment unit. The adaptive operation database unit is an intelligent system based on a database, which can search and match the corresponding control modes and fault handling strategies in the database according to the received fault mode information. These strategies and modes can be preset through historical data and expert experience; the mode operation unit performs logical calculations according to the control mode selected by the adaptive operation database unit to determine the valve position opening control amount 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 state and control target; the control output unit converts the valve position opening control amount calculated by the mode operation unit into an actual execution signal and sends it to the seawater inlet water level regulating valve.

[0024] Combined with the first aspect, in an implementation manner, 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 selected control operation unit, and is used to receive the switching quantity signal of the selected control operation unit and operate the seawater inlet water level regulating valve to act; 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.

[0025] 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 signal lines or wirelessly. When the control unit calculates the appropriate valve position opening, it sends an analog signal to the remote control unit. After receiving the control signal, the remote control unit drives 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 digital signals from the selective control operation unit. These signals are usually binary (on / off) and are used to quickly control the opening or closing of the valve in case of emergency or specific operation modes. The switch control unit is connected to the selective control operation unit, which can be through hardwiring or wirelessly. When the operator sends a switch signal through the selective 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 particularly important in case of emergency, such as when the system detects abnormal water level or equipment failure. 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 opening or position of the valve 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 signal lines or wirelessly. The control unit uses this feedback signal to evaluate the current control effect and adjust the control strategy as needed.

[0026] In combination with the first aspect, in one embodiment, the selective 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. The operating modes of the seawater inlet water level regulating valve include remote control and automatic control. The operator includes an adjustment for remotely controlling the seawater inlet water level regulating valve.

[0027] In this embodiment, the main function of the selector is to select the operating mode of the seawater inlet water level regulating valve. These operating modes usually include two modes: remote control and automatic. The remote control mode allows the operator to remotely control the valve's action through external instructions, while the automatic mode enables the valve to automatically adjust its opening according to a preset control strategy. The selector communicates with the control unit through electrical or digital communication connections. The operating mode selection instruction sent by the control unit is received by the selector, and the operating mode of the valve is set according to the instruction. At the same time, the selector also feeds back the currently selected operating mode information to the control unit. In the remote control mode, the operator receives adjustment instructions from the outside (such as the control unit or other remote control devices) and converts these instructions into instructions for driving the valve's action. These instructions include the valve's opening and switching speed parameters. The operator is directly connected to the actuator of the seawater inlet water level regulating valve (such as an electric motor, a hydraulic cylinder, etc.). The remote control instructions received by the operator are converted into corresponding drive signals and sent to the actuator to control the valve's action. At the same time, the operator is also equipped with a position sensor or an encoder to monitor the valve's opening in real time and feed it back to the control unit.

[0028] Combined with the first aspect, in an embodiment, the water level measuring sensor of the seawater evaporation device includes a magnetostrictive measuring sensor, and the magnetostrictive measuring sensor is communicated with the seawater evaporation device through a U-shaped measuring tank; an anticorrosive layer is provided on both the floating ball and the casing flange of the magnetostrictive measuring sensor, 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 polytetrafluoro material.

[0029] In this embodiment, the magnetostrictive measuring sensor accurately measures the actual displacement value (or liquid level value) of the detected product by precisely detecting the absolute position of the moving magnetic ring through internal non-contact measurement and control technology. It has the characteristics of high precision, high reliability, long life, and strong environmental adaptability, and is very suitable for measuring the water level of the seawater evaporation device. The U-shaped measuring tank is used to connect the seawater evaporation device and the magnetostrictive measuring sensor. It may play a role in blocking gas, preventing air from entering, and acting as a piezometer to display whether the pressures on both liquid surfaces are equal. At the same time, the design of the U-shaped tank also helps to stabilize the measurement and reduce fluctuations caused by external factors. Since seawater has strong corrosiveness, it is necessary to provide an anticorrosive layer on the floating ball and the casing flange of the magnetostrictive measuring sensor, which can protect the sensor from seawater corrosion and extend its service life. The measuring rod and the outer cover are selected to be made of stainless steel because of their excellent corrosion resistance and mechanical strength, which can adapt to the strong corrosive medium of seawater. Polytetrafluoro material (PTFE) is a high-performance plastic material with excellent corrosion resistance and high-temperature resistance, and is suitable for components such as locking rings.

[0030] Second aspect, an embodiment of the present application provides a control method for an adaptive ship seawater evaporation device water level control system as described in the above embodiments, which includes the following steps: S100: Collect and display the water level of the seawater evaporation device, the temperature of the heating steam, the seawater inlet flow rate, the valve position feedback signal, collect the selected control operator signal and the intermittent start-stop unit signal, and output the results to the control unit; S200: If it is determined that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature and set the flow correction coefficient according to the measured value of the seawater inlet flow rate; S300: If it is determined that the water level is within the specified range and it is determined that there is no fault in the seawater evaporation device water level control system, then the control unit dynamically selects the humanoid point operation control mode, and calculates based on the water level, the heating steam temperature, the seawater inlet flow rate, the temperature compensation coefficient and the flow correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at an appropriate valve position.

[0031] In this embodiment, S100 first collects key parameters such as the water level of the seawater evaporation device, the temperature of the heating steam, the seawater inlet flow rate, and the valve position feedback signal. At the same time, it also collects the selected 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 operation data and provides a basis for subsequent control decisions; S200 will judge whether the intermittent start-stop unit is in the running state and whether the selected control operation unit is in the automatic mode. At the same time, it will also check whether the heating steam temperature is not lower than the set value. Only when all these conditions are met, will the temperature compensation coefficient be set according to the measured value of the heating steam temperature and the flow correction coefficient be set according to the measured value of the seawater inlet flow rate. This step is to ensure that the system operates under appropriate conditions; S300, when the water level is within the specified range and there is no fault in the seawater evaporation device water level control system, the control unit dynamically selects the humanoid point operation control mode, which simulates the operation habits and experience of people, and comprehensively calculates based on the current water level, the heating steam temperature, the seawater inlet flow rate, the temperature compensation coefficient and the flow correction coefficient. The calculation result is transmitted to the electric actuator unit 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 humanoid point operation control mode simulates the operation habits and experience of people and can achieve more flexible and intelligent water level control.

[0032] Combined with the second aspect, in an implementation manner, after S200, the following steps are further included: S400: If it is determined that the heating steam temperature sensor or the seawater inlet flow sensor fails, the control unit dynamically selects a water level control mode with a first-order integral characteristic transfer function according to the fault status, and calculates based on the water level, heating steam temperature or seawater inlet flow, temperature compensation coefficient or correction coefficient, and transmits the calculated control quantity result of the valve opening to the electric actuator unit to make the seawater inlet water level regulating valve at an appropriate valve position.

[0033] In this embodiment, if it is detected that the heating steam temperature sensor or the seawater inlet flow sensor fails, the system dynamically selects a water level control mode with a first-order integral characteristic transfer function by using the control unit. In this mode, the system calculates based on the currently available water level data, heating steam temperature or seawater inlet flow data (if the corresponding sensor does not fail), temperature compensation coefficient and flow correction coefficient (if the corresponding sensor does not fail). The calculated control quantity of the valve opening is transmitted to the electric actuator unit to adjust the valve position of the seawater inlet water level regulating valve, so as to maintain the water level within an appropriate range. Among them, the first-order integral characteristic transfer function, this control mode helps the system to maintain stable water level control performance in the face of sensor failures, and smooths the control output through the integral characteristic to reduce system fluctuations caused by sensor failures.

[0034] Combined with the second aspect, in an implementation manner, after S200, the following steps are further included: S500: If it is determined that the seawater evaporation device water level measurement sensor or the seawater inlet water level regulating valve fails, the control unit dynamically selects a control output locking control mode according to the fault status, and selects the output of the seawater inlet water level regulating valve to lock and maintain the existing position, and prompts the operator to switch to remote control.

[0035] In this embodiment, the system continuously monitors the working status of the seawater evaporation device water level measurement sensor and the seawater inlet water level regulating valve. Once it is detected that the above-mentioned sensor or regulating valve fails, 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 and maintained at 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 the remote control mode for further fault diagnosis and processing.

[0036] Combined with the second aspect, in an implementation manner, after S200, the following steps are further included: S600: If it is determined that the water level is higher than the specified range and 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 prediction control mode. Calculations are performed based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow rate 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 an appropriate valve position.

[0037] In this embodiment, the system continuously monitors the water level data. If it is determined that the water level is higher than the upper limit of the specified range and it is confirmed that there is no fault in the water level control system of the seawater evaporation device, the control unit performs the following operations: set a high water level warning to notify the operator to pay attention, set a high water level correction coefficient to adjust the control strategy to cope with the high water level situation, dynamically select a variable weight prediction control mode, which is calculated 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, and transmit the calculated valve position opening control quantity result to the electric actuator unit to adjust the seawater inlet water level regulating valve to an appropriate valve position, thereby reducing the water level. Among them, compared with other control modes, the variable weight prediction control mode usually has higher control accuracy. It can comprehensively consider multiple influencing factors and perform precise calculations based on the real-time measured values of these factors, so as to obtain a more accurate valve position opening control quantity.

[0038] Combined with the second aspect, in an implementation manner, after S200, the following steps are further included: S700: If it is determined that the water level is lower than the specified range and there is no fault in the water level control system of the seawater evaporation device, the control unit is used to set a low water level warning and a low water level correction coefficient, and the control unit is used to dynamically select a variable weight prediction control mode. Calculations are performed based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow rate 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 an appropriate valve position.

[0039] In this embodiment, the system can monitor the water level data in real time and issue a warning in time when the water level drops abnormally to notify the operator to pay attention. By setting a low water level correction coefficient, the system can adjust the control strategy to more effectively cope with the low water level situation. The variable weight prediction control mode can be dynamically adjusted based on multiple parameters to achieve more precise water level control. Once the 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.

[0040] Combined with the second aspect, in one embodiment, S300, S400, S500, S600, and S700 do not have a sequential step relationship.

[0041] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or device including the said element.

[0043] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. An adaptive water level control system for the seawater evaporation device of a ship, characterized in that, It includes: A control unit, which is connected with 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 water level measuring sensor for the seawater evaporation device and a heating steam temperature sensor. The seawater inlet water level regulating valve is connected with the control unit through an electric actuator unit. The seawater inlet flow sensor is connected with the flow display unit. The water level measuring sensor for the seawater evaporation device is connected with the water level display unit. The heating steam temperature sensor is connected with the temperature display unit; A selective control operation unit and a valve position display unit. The selective control operation unit is respectively connected with the control unit and the electric actuator unit. The valve position display unit is respectively connected with the control unit and the electric actuator unit; The control unit is used for receiving selective control operation signals, water level signals, heating steam temperature signals, seawater inlet flow signals, valve position feedback signals and intermittent start-stop signals, and adaptively controlling the water level regulating valve according to the received signals.

2. The adaptive water level control system for a ship's seawater evaporation device according to claim 1, wherein The control unit includes a collection unit, a fault judgment unit, a mode operation unit and a control output unit which are connected in sequence. The collection unit is connected with a control display unit. The fault judgment unit and the mode operation unit are connected with an adaptive operation database unit; The collection unit is connected with the selective control operation unit, the flow display unit, the water level display unit, the temperature display unit and the intermittent start-stop unit. It is used for collecting selective control operation signals, water level signals, temperature signals, flow signals, valve position feedback signals and intermittent start-stop signals, and transmitting the collected signals to the control display unit and the fault judgment unit; The fault judgment unit discriminates and judges the fault mode and sends it to the adaptive operation database unit. The adaptive operation database performs combined 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 with the seawater inlet water level regulating valve to complete the control of the seawater inlet water level regulating valve.

3. The adaptive water level control system for a ship's seawater evaporation device according to claim 1, wherein 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 with the control unit. It is used for receiving the analog control signal of the control unit and driving the seawater inlet water level regulating valve to operate; The switch control unit is connected with the selective control operation unit. It is used for receiving the switching quantity signal of the selective control operation unit and operating the seawater inlet water level regulating valve to act; The valve position feedback unit is connected with the control unit. It is used for sending the position signal of the seawater inlet water level regulating valve to the control unit.

4. The water level control system of the adaptive ship seawater evaporation device as described in claim 1, wherein the selected 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 operation mode of the seawater inlet water level regulating valve. The operation modes of the seawater inlet water level regulating valve include remote control and automatic control. The operator includes the regulation for remotely controlling the seawater inlet water level regulating valve.

5. The water level control system of the adaptive ship seawater evaporation device as described in claim 1, wherein the water level measurement sensor of the seawater evaporation device includes a magnetostrictive measurement sensor. The magnetostrictive measurement sensor is connected to the seawater evaporation device through a U-shaped measurement tank; the float ball and the casing flange of the magnetostrictive measurement sensor are both provided with an anti-corrosion layer. The measuring rod and the outer cover of the magnetostrictive measurement sensor are both made of stainless steel, and the locking ring of the magnetostrictive measurement sensor is made of polytetrafluoro material.

6. A control method for the water level control system of the adaptive ship seawater evaporation device according to any one of claims 1-5, characterized in that, It includes the following steps: Collect and display the water level of the seawater evaporation device, the heating steam temperature, the seawater inlet flow rate, and the valve position feedback signal, collect the selected control operator signal and the intermittent start-stop unit signal, and output the results to the control unit; If it is judged that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature, and set the flow correction coefficient according to the measured value of the seawater inlet flow rate; If it is judged that the water level is within the specified range and it is judged that there is no fault in the water level control system of the seawater evaporation device, then the control unit is used to dynamically select the humanoid point operation control mode, and calculate based on the water level, the heating steam temperature, the seawater inlet flow rate, the temperature compensation coefficient and the flow correction coefficient, and transmit the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

7. The control method of the water level control system of the adaptive ship seawater evaporation device as described in claim 6, wherein after the step of if it is judged that the intermittent start-stop unit is in operation, the selected control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, then set the temperature compensation coefficient according to the measured value of the heating steam temperature, and set the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is judged that the heating steam temperature sensor or the seawater inlet flow rate sensor fails, then the control unit dynamically selects the water level control mode of the first-order integral characteristic transfer function according to the fault state, and calculates based on the water level, the heating steam temperature or the seawater inlet flow rate, the temperature compensation coefficient or the correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

8. The control method of the water level control system of the adaptive ship seawater evaporation device as described in claim 6, wherein If it is judged that the intermittent start-stop unit is in operation, the selection control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, after setting the temperature compensation coefficient according to the measured value of the heating steam temperature and setting the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is judged that the water level measurement sensor of the seawater evaporation device or the seawater inlet water level regulating valve fails, the control unit dynamically selects the control output lock control mode according to the fault state, selects the seawater inlet water level regulating valve output lock to maintain the existing position, and prompts the operator to switch to remote control.

9. The control method of the adaptive ship seawater evaporation device water level control system according to claim 6, wherein: If it is judged that the intermittent start-stop unit is in operation, the selection control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, after setting the temperature compensation coefficient according to the measured value of the heating steam temperature and setting the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is judged that the water level is higher than the specified range and it is judged that there is no fault in the seawater evaporation device water level control system, the control unit sets the high water level warning and the high water level correction coefficient, and the control unit dynamically selects the variable weight prediction control mode, calculates based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow correction coefficient and high water level correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

10. The control method of the adaptive ship seawater evaporation device water level control system according to claim 6, wherein: If it is judged that the intermittent start-stop unit is in operation, the selection control operation unit is in the automatic mode, and the heating steam temperature is not lower than the set value, after setting the temperature compensation coefficient according to the measured value of the heating steam temperature and setting the flow correction coefficient according to the measured value of the seawater inlet flow rate, it further includes: If it is judged that the water level is lower than the specified range and it is judged that there is no fault in the seawater evaporation device water level control system, the control unit sets the low water level warning and the low water level correction coefficient, and the control unit dynamically selects the variable weight prediction control mode, calculates based on the water level, heating steam temperature, seawater inlet flow rate, temperature compensation coefficient, flow correction coefficient and low water level correction coefficient, and transmits the calculated valve position opening control quantity result to the electric actuator unit to make the seawater inlet water level regulating valve at a suitable valve position.

Images