Pressure control method for water supply system from condensate pump to deaerator

Abstract

The invention provides a pressure control method for a system for supplying water from a condensate pump to a deaerator, and the method comprises the following steps: calculating a set value of the outlet pressure of the condensate pump according to the water supply pressure demand of the deaerator by combining the height difference between the condensate pump and the deaerator and the pipeline pressure loss; the outlet pressure of the condensate pump is monitored in real time, and the actual outlet pressure is compared with the set pressure; when the actual outlet pressure is lower than the set pressure, the operation frequency of a condensate pump frequency converter is adjusted, and the condensate pump outlet pressure is increased to a set value; when the actual outlet pressure is higher than the set pressure, the opening degree of a water feeding adjusting valve of the deaerator is adjusted, the condensate pump outlet pressure is reduced, and the system operation efficiency is optimized; when the outlet pressure of the condensate pump is lower than the minimum pressure, triggering the control system to give an alarm and forcibly adjusting the frequency of the condensate pump frequency converter to recover the pressure to a normal range; based on outlet pressure data monitored in real time and an opening signal of the regulating valve, automatic closed-loop regulation of the condensate pump and the deaerator water supply system is achieved through preset control logic.

Description

Technical Field

[0001] The invention relates to the field of electric water pump control, and in particular to a pressure control method for a condensate pump to supply water to a deaerator. Background Art

[0002] In modern industry, condensate pumps (also called condensate pumps) are widely used in various water supply systems, especially in the condensate circulation process of thermal equipment and chemical equipment. Condensate pumps are mainly responsible for extracting condensate from steam boiler systems or heat exchange equipment and transporting it to deaerators or other related equipment for treatment and recovery. As an important equipment for water treatment, deaerators are usually used to remove dissolved gases (such as oxygen) in water, prevent equipment corrosion and scale formation, and ensure efficient and stable operation of the system.

[0003] In such water supply systems, the operating pressure of the condensate pump has a crucial impact on the stability and efficiency of the water supply system. The outlet pressure of the condensate pump must meet the water supply demand of the deaerator, while also taking into account the pressure loss of the pipeline and the height difference between the equipment. This requires the pressure control system of the condensate pump to not only ensure that the water supply demand is met, but also to ensure the long-term safe operation of the equipment.

[0004] However, in traditional condensate pump water supply systems, the control of condensate pump outlet pressure usually relies on manual monitoring and adjustment. Operators often use experience to judge whether the pressure at the condensate pump outlet is appropriate, which not only increases the workload of operators, but also may cause system pressure instability, thereby affecting the normal operation of the deaerator and may even cause equipment failure. In addition, traditional control methods make it difficult to achieve intelligent regulation of the system and optimize the water supply pressure according to actual working conditions, resulting in energy waste and low system efficiency.

[0005] Therefore, how to optimize the operation of the condensate pump through a more precise and intelligent control method while ensuring the normal operation of the deaerator has become an important technical problem in the industrial water supply system. In order to improve the safety, stability, economy and automation level of the system, the present invention proposes a pressure control method for the condensate pump to the deaerator water supply system based on real-time pressure monitoring and automatic regulation to solve the deficiencies in the prior art and thus improve the efficiency and reliability of the entire water supply system. Summary of the invention

[0006] In a first aspect of the present disclosure, a method for controlling the pressure of a condensate pump to a water supply system of a deaerator is provided, the method comprising the following steps:

[0007] According to the water supply pressure requirement of the deaerator, combined with the height difference between the condensate pump and the deaerator and the pipeline pressure loss, calculate the set value of the condensate pump outlet pressure;

[0008] The outlet pressure of the condensate pump is monitored in real time by the pressure sensor, and the actual outlet pressure is compared with the set pressure to determine whether the water supply pressure requirement is met;

[0009] When the actual outlet pressure is lower than the set pressure, adjust the operating frequency of the condensate pump inverter to increase the condensate pump outlet pressure to the set value;

[0010] When the actual outlet pressure is higher than the set pressure, the condensate pump outlet pressure can be reduced and the system operating efficiency can be optimized by adjusting the opening of the deaerator water supply regulating valve;

[0011] Set the minimum pressure threshold. When the condensate pump outlet pressure is lower than the minimum pressure, the control system alarm is triggered and the condensate pump inverter frequency is forced to adjust to restore the pressure to the normal range.

[0012] Based on the real-time monitored outlet pressure data and regulating valve opening signal, preset control logic is used to realize automatic closed-loop regulation of the condenser pump and deaerator water supply system, ensuring that the system can achieve energy-saving operation while meeting water supply needs.

[0013] In combination with the first aspect, the calculation formula of the set pressure is:

[0014] P 设定 =P 除氧器所需 +P 管路损耗 +Δh*ρ*g,

[0015] Among them, P 除氧器所需 The pressure required for the normal operation of the deaerator, P 管路损耗 is the pipeline pressure loss, Δh is the height difference between the condensate pump and the deaerator, ρ is the fluid density, and g is the gravitational acceleration.

[0016] In combination with the first aspect, the pressure sensor is installed at the outlet of the condensate pump and is connected to the control system through a communication module, so as to collect the pressure signal in real time and transmit it to the control system for processing.

[0017] In combination with the first aspect, when the actual outlet pressure is lower than the minimum pressure threshold and the system cannot be restored to normal pressure through inverter adjustment, the control system starts the standby condensate pump to ensure normal water supply to the deaerator.

[0018] In combination with the first aspect, the control system includes a pressure sensing module, a data processing module, a frequency conversion control module and an alarm module. The data processing module compares and analyzes the collected real-time pressure signal with the set pressure. The frequency conversion control module is used to adjust the frequency of the condensing pump inverter. The alarm module is used to send a prompt signal to the operator when the pressure is abnormal.

[0019] In combination with the first aspect, the automated closed-loop regulation logic comprises the following steps:

[0020] Obtain the condensate pump outlet pressure signal and the regulating valve opening signal in real time;

[0021] Compare the outlet pressure signal with the set pressure, and adjust the condensate pump inverter frequency and regulating valve opening through control logic according to the pressure deviation until the outlet pressure reaches the set range;

[0022] When the outlet pressure approaches the minimum pressure threshold, the frequency of the condensate pump inverter is forced to be adjusted first and an alarm signal is triggered.

[0023] According to a second aspect of the present disclosure, there is provided an electronic device, comprising:

[0024] one or more processors;

[0025] The storage unit is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors can implement the pressure control method of the condensate pump to the deaerator water supply system.

[0026] According to a third aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that when the computer program is executed by a processor, a method for controlling the pressure of the condensate pump to the deaerator water supply system can be implemented.

[0027] Beneficial effects: The outlet pressure of the condensate pump is monitored in real time by the pressure sensor and compared with the set pressure. It can immediately determine whether the water supply demand is met and ensure that the water supply pressure is always in the best state. The operating frequency of the condensate pump is adjusted by the frequency converter, and the opening of the regulating valve of the deaerator is adjusted to achieve automatic closed-loop adjustment of the system without manual intervention, which greatly reduces the workload of the operating personnel. When the outlet pressure of the condensate pump is higher than the set pressure, the system optimizes the system operation efficiency by adjusting the water supply regulating valve of the deaerator to achieve energy saving effect; when the pressure is lower than the set value, the pressure is increased by adjusting the frequency converter to ensure that the water supply demand is not affected. The system sets a minimum pressure threshold. When the pressure is too low, the alarm is triggered and the frequency converter of the condensate pump is adjusted to restore the pressure, or the standby condensate pump is started to ensure stable operation of the system and avoid failure of the deaerator due to insufficient pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of a method for controlling the pressure of a condensate pump supplying water to a deaerator according to an embodiment of the present disclosure;

[0029] Figure 2 An electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present disclosure.

[0031] The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments and are not intended to limit the disclosed embodiments. The singular forms of "a", "said" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the disclosed embodiments, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosed embodiments, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0033] like Figure 1 FIG. 1 is a flow chart of a method for controlling the pressure of a condensate pump to supply water to a deaerator according to an embodiment of the present disclosure, comprising:

[0034] S101: Calculate the set value of the condensate pump outlet pressure according to the water supply pressure requirement of the deaerator, combined with the height difference between the condensate pump and the deaerator and the pipeline pressure loss;

[0035] S102: monitor the outlet pressure of the condensate pump in real time through a pressure sensor, compare the actual outlet pressure with the set pressure, and determine whether the water supply pressure requirement is met;

[0036] S103: When the actual outlet pressure is lower than the set pressure, the operating frequency of the condensate pump inverter is adjusted to increase the condensate pump outlet pressure to the set value;

[0037] S104: When the actual outlet pressure is higher than the set pressure, the outlet pressure of the condensate pump is reduced and the system operation efficiency is optimized by adjusting the opening of the deaerator water supply regulating valve;

[0038] S105: Setting a minimum pressure threshold. When the outlet pressure of the condensate pump is lower than the minimum pressure, the control system alarm is triggered and the frequency of the condensate pump inverter is forcibly adjusted to restore the pressure to a normal range.

[0039] S106: Based on the real-time monitored outlet pressure data and the regulating valve opening signal, the preset control logic is used to realize the automatic closed-loop regulation of the condenser pump and the deaerator water supply system.

[0040] Specifically, S101: calculation of set pressure.

[0041] Calculate the target pressure at the condensate pump outlet based on the deaerator operating requirements.

[0042] Formula: P 设定 =P 除氧器所需 +P 管路损耗 +Δh*ρ*g,

[0043] Variable explanation: Among them, P 除氧器所需 It is the pressure required for the normal operation of the deaerator. The minimum pressure requirement for the normal operation of the deaerator is usually given by the equipment design parameters.

[0044] P 管路损耗 It is the pipeline pressure loss, the pressure loss of the water pipeline, taking into account the loss caused by pipeline length, diameter and water flow velocity.

[0045] Δh is the height difference between the condensate pump and the deaerator. A positive value indicates upward transport, and a negative value indicates downward transport.

[0046] ρ is the fluid density, the density of condensed water (close to 1000kg / m at room temperature) 3 ).

[0047] g is the acceleration due to gravity, about 9.81 m / s 2 .

[0048] By inputting system operating parameters in real time, the set pressure is adjusted dynamically to adapt to changes in operating conditions. This formula provides a calculation basis for closed-loop control, ensuring accuracy and responsiveness.

[0049] S102: Real-time pressure monitoring and comparison.

[0050] The pressure sensor installed at the outlet of the condensate pump is used to collect the current outlet pressure data in real time and compare it with the set value.

[0051] The pressure sensor needs to have high sensitivity (such as error range ≤ 0.5%) and support high-speed data transmission to ensure accurate monitoring. The data is transmitted to the control system through the communication module, and the data processing module performs comparative analysis. If the pressure deviation is within the acceptable range (such as ±2%), the system does not need to be adjusted; if it exceeds the range, it will enter the subsequent adjustment link.

[0052] S103: Low pressure regulation (increasing pressure).

[0053] When the actual outlet pressure is lower than the set value, the system adjusts the operating frequency of the condensate pump inverter to increase the pump speed, thereby increasing the outlet pressure. Inverter parameters: The control frequency range is 30-50Hz, which can be adjusted according to the pressure deviation ratio. After each adjustment, the system immediately updates the pressure data to ensure that the adjustment is in place.

[0054] Low pressure may lead to insufficient water supply, affecting the degassing efficiency or operational safety of the deaerator. By increasing the pressure, the stability of water supply can be ensured.

[0055] S104: High pressure regulation (lowering pressure).

[0056] When the actual outlet pressure is higher than the set value, adjust the opening of the deaerator's water supply regulating valve to release some of the excessive pressure, thereby avoiding unnecessary energy consumption. The regulating valve is electrically controlled and uses a proportional integral (PI) algorithm to control the opening to dynamically adapt to the outlet pressure. Appropriately increase the valve opening to reduce the pressure, but avoid excessive adjustment to cause pressure fluctuations.

[0057] By optimizing the coordinated action of the regulating valve and the condensate pump, energy loss can be reduced and the overall operating efficiency can be improved.

[0058] S105: Minimum pressure threshold and alarm.

[0059] Set the minimum pressure threshold to ensure that the system can respond in time and protect the safe operation of the equipment in extreme cases. If the outlet pressure is lower than the minimum pressure (such as 0.8*P 设定 ), the system alarms and forces the inverter frequency to be adjusted. If the inverter adjustment cannot restore the pressure, the standby condensate pump is automatically activated. Sound and light signals can be issued or SMS or email can be sent through the network to notify the operator. The setting of the minimum pressure value needs to comprehensively consider the system safety, water supply demand and equipment operation limit.

[0060] S106: Closed-loop automatic adjustment.

[0061] The entire pressure control system realizes automatic adjustment through preset closed-loop control logic to avoid manual intervention. The pressure sensor signal and the control valve opening signal are collected in real time and fed back to the control system. The inverter frequency and the control valve opening are adjusted according to the pressure deviation to ensure that the outlet pressure is stable within the set range. If the pressure is close to the minimum threshold, the inverter is adjusted first and the alarm signal is triggered.

[0062] Utilize a closed-loop feedback mechanism to ensure rapid and accurate adjustments. Automated control improves operational efficiency, reduces energy consumption, and reduces the error rate of manual operations. Through the above steps, this method has significant advantages in real-time monitoring, intelligent adjustment, and safety protection:

[0063] Furthermore, the pressure sensor is installed at the outlet of the condensate pump and is connected to the control system through a communication module, so as to collect the pressure signal in real time and transmit it to the control system for processing.

[0064] The pressure sensor is fixedly installed at a key node position on the outlet pipeline of the condensate pump, close to the pump outlet flange or pressure adjustment point.

[0065] Ensure that the collected pressure signal can accurately reflect the outlet pressure of the pump without errors caused by pipeline length or resistance. The position is close to the adjustment area to facilitate the rapid response of the feedback adjustment system.

[0066] Monitor the changes in the condensate pump outlet pressure in real time, capture instantaneous pressure fluctuations, and meet the needs of efficient dynamic regulation.

[0067] The signal collected by the pressure sensor is transmitted to the control system through the communication module.

[0068] Wired communication:

[0069] Adopt 4-20mA signal or RS485 communication protocol.

[0070] Advantages: strong anti-interference ability, stable data transmission, suitable for complex environments in industrial sites.

[0071] Application scenarios: Wired connections are used in most fixed devices to ensure accurate data transmission.

[0072] Wireless Communication:

[0073] Based on LoRa, Wi-Fi or ZigBee technology.

[0074] Advantages: No wiring required, suitable for monitoring scenes with complex layouts or mobile devices.

[0075] Application scenarios: remote monitoring systems or areas where wiring is difficult.

[0076] The analog signal of the pressure sensor is converted into a digital signal through an A / D converter and then input into the communication module.

[0077] The communication module packages the signal into a standard data format (such as Modbus) and transmits it to the control system through the network or data bus. The data processing module in the control system (such as PLC or DCS) analyzes, verifies and stores the signal and uses it to adjust the logic judgment.

[0078] Technical requirements for real-time acquisition, sampling frequency:

[0079] According to the system requirements, select an appropriate sampling frequency (such as 10Hz or higher) to ensure that dynamic pressure changes can be captured.

[0080] Acquisition accuracy: The range and accuracy of the pressure sensor need to adapt to the working conditions. Range: Set according to the maximum pressure at the pump outlet (such as 0~2MPa).

[0081] Accuracy level: Recommended ≤0.1% FS (full scale) to ensure small measurement error.

[0082] Abnormal signal identification: Remove noise signals through signal filtering technology (such as mean filtering, Kalman filtering) to ensure the stability and authenticity of pressure data. Data storage and analysis: Real-time data is stored in the control system database for historical analysis and trend prediction of operating status.

[0083] Intelligent algorithm support: Apply adaptive control or machine learning algorithms to analyze pressure signals, optimize regulation logic, and improve regulation efficiency.

[0084] The real-time pressure signal provides the control system with basic data for regulation, which directly determines the accuracy of the frequency regulation of the inverter and the optimization of the opening of the regulating valve. The rapidity and accuracy of signal acquisition and transmission ensure that the regulation system can respond to pressure changes in milliseconds. If the sensor detects that the pressure exceeds the set threshold, the control system can immediately start the protection mechanism (such as pump speed adjustment, alarm triggering or standby pump start-up).

[0085] Through the feedback signal of the pressure sensor, the system can optimize the operating status of the pump and valve in real time to avoid energy waste or equipment loss caused by excessively high or low pressure.

[0086] Furthermore, when the actual outlet pressure is lower than the minimum pressure threshold and the system cannot be restored to normal pressure through inverter regulation, the control system starts the standby condensate pump to ensure normal water supply to the deaerator.

[0087] When the actual outlet pressure is lower than the minimum pressure threshold and the main condensate pump cannot be restored to normal pressure through the inverter adjustment, starting the backup condensate pump is a key measure to ensure the stable operation of the system. This mechanism improves the reliability and safety of the water supply system through redundant design and automated control, and avoids abnormal operation of the deaerator due to water supply interruption.

[0088] The control logic for starting the standby condensate pump, the outlet pressure is abnormal: the pressure sensor detects that the actual outlet pressure is lower than the set minimum pressure threshold (such as 0.4MPa).

[0089] Invalid main pump regulation: The control system attempts to increase the speed of the main condensate pump through the inverter, but still cannot restore the pressure to the set range (such as 2 or more failed attempts).

[0090] A possible main pump failure has been detected (such as motor overload, mechanical wear, or fluid cavitation).

[0091] Standby condensate pump start-up process, control signal issued:

[0092] The system sends a start signal for the standby condensate pump and starts the standby pump through the electrical control cabinet or intelligent controller.

[0093] Synchronous switching logic: adjust the output of the main condensate pump to gradually reduce to stop, and gradually increase the frequency and output pressure of the standby pump to ensure a smooth transition of water supply pressure.

[0094] System stability detection: After starting the standby pump, the control system monitors the outlet pressure to verify whether it has returned to the normal pressure range (such as 0.6~0.8MPa).

[0095] Operation mode after the standby condensate pump is started:

[0096] 1. Single machine operation mode

[0097] When the standby pump completely takes over the water supply responsibility of the main pump, the system marks the main pump as "pending for maintenance" and only keeps the standby pump running.

[0098] 2.Dual pump coordination mode

[0099] In some cases (such as a sharp increase in water demand or limited backup pump capacity), the backup pump can be started and run together with the main pump to form a dual-pump coordinated water supply. The control system dynamically allocates the operating frequency and output power of the two pumps according to actual demand.

[0100] Optional, main pump fault analysis: The system records and analyzes the reasons for ineffective main pump regulation (such as pressure fluctuation records, motor current abnormalities, etc.), providing a basis for subsequent maintenance.

[0101] Alarm mechanism: Audible and visual alarms remind operators that the standby pump has been activated.

[0102] Send fault information to the central control room or maintenance personnel's mobile device.

[0103] Health management of standby pumps, regular test runs:

[0104] The control system will periodically start the standby pump for a short period of time to ensure that it is in a normal and available state and avoid performance degradation caused by long-term idleness.

[0105] Backup pump priority: When the backup pump is in a "low health state" (such as high vibration, low operating efficiency), the control system can switch to the secondary backup pump (if available) to further improve reliability.

[0106] Through the above mechanism, the start-up of the standby condensate pump not only realizes the pressure regulation function of the water supply system, but also embodies the design concept of intelligence, reliability and efficient operation. It is an indispensable part of the modern industrial system.

[0107] Furthermore, the control system includes a pressure sensing module, a data processing module, a frequency conversion control module and an alarm module. The data processing module compares and analyzes the collected real-time pressure signal with the set pressure. The frequency conversion control module is used to adjust the frequency of the condensing pump inverter. The alarm module is used to send a prompt signal to the operator when the pressure is abnormal.

[0108] Pressure sensing module functions:

[0109] The pressure data at the condensate pump outlet is collected in real time and converted into electrical signals for transmission to the data processing module.

[0110] Working mechanism: Sensor type: Generally, high-precision pressure sensors (such as strain gauge or diffused silicon) are used, which have fast response speed and strong anti-interference ability.

[0111] Installation location: The pressure sensor is installed on the pipe at the outlet of the condensate pump to ensure the accuracy of the collected pressure signal.

[0112] Optimization and expansion: Add multi-point pressure monitoring: Install multiple sensors at key nodes of the pipeline (such as deaerator inlet and condenser pump outlet) to build a pressure distribution map for accurate diagnosis of the location of pressure loss.

[0113] Introducing smart sensors: supporting wireless data transmission, fault self-detection and environmental adaptability (such as high temperature resistance and corrosion resistance) to improve the robustness of the system.

[0114] Function of the data processing module: Receive real-time signals from the pressure sensing module, compare them with the set pressure value, analyze whether the pressure is within the target range, and determine the subsequent adjustment strategy.

[0115] Working mechanism:

[0116] Data analysis process: Filter the sensor signal to eliminate environmental interference (such as signal noise).

[0117] Pressure deviation calculation: Calculate the difference between actual pressure and set pressure in real time.

[0118] Adjustment command generation: Determine the adjustment parameters of the frequency conversion control module based on the deviation size and trend.

[0119] Predictive control: Introduce a prediction algorithm based on historical pressure data and operating modes to perceive possible anomalies in advance and optimize the regulation effect.

[0120] Self-learning algorithm: Use AI technology to adjust control parameters (such as the gain value of the PID controller) to achieve adaptive optimization of pressure regulation.

[0121] Function of the frequency conversion control module: Receive the adjustment instructions from the data processing module, control the operating frequency of the condensate pump inverter, thereby adjusting the speed of the pump and changing the outlet pressure.

[0122] Working mechanism: By changing the frequency of the inverter, the speed of the pump is adjusted so that its output pressure meets the target set value.

[0123] The speed and pressure have a nonlinear relationship, and the frequency conversion control module needs to dynamically adjust the frequency to cope with different load conditions.

[0124] High-precision frequency control: Using advanced vector control technology, the inverter can still output stable pressure at low frequency.

[0125] Energy-saving mode: When water demand is low, the module can automatically reduce the pump speed to save energy.

[0126] Intelligent redundant switching: When the main inverter fails, the backup inverter can take over seamlessly to achieve continuous water supply.

[0127] Function of the alarm module: When the system detects abnormal pressure (such as pressure too low, too high or excessive fluctuation), it sends an alarm signal to the operator to remind them to intervene in time.

[0128] Working mechanism: The pressure deviates from the set range for more than a certain period of time (such as 3 seconds). The system detects a sensor or pump operation failure.

[0129] Alarm form:

[0130] Sound and light alarm: alert personnel via buzzer and warning light on site.

[0131] Remote alarm: Send abnormal information to the control room or the operator's mobile device.

[0132] Optimization and expansion: Divide the abnormality into different levels (such as warning level and severe level) according to the degree of abnormality and take corresponding response measures.

[0133] Fault cause display: Detailed abnormal causes (such as sensor failure, inverter overload) are displayed on the alarm interface to help operators quickly locate the problem.

[0134] History recording and analysis: Record alarm logs for subsequent maintenance and operation optimization.

[0135] Real-time monitoring and feedback: After the pressure sensing module collects the signal, the data processing module quickly determines the pressure status and generates adjustment or alarm instructions.

[0136] Closed-loop control: The data processing module and the frequency conversion control module form a closed loop to dynamically adjust the pump speed and keep the outlet pressure stable.

[0137] Abnormal emergency response: When pressure regulation cannot meet the demand, the alarm module promptly notifies the operator to assist manual intervention.

[0138] Furthermore, the automated closed-loop regulation logic includes the following steps:

[0139] Obtain the condensate pump outlet pressure signal and the regulating valve opening signal in real time;

[0140] Compare the outlet pressure signal with the set pressure, and adjust the condensate pump inverter frequency and regulating valve opening through control logic according to the pressure deviation until the outlet pressure reaches the set range;

[0141] When the outlet pressure approaches the minimum pressure threshold, the frequency of the condensate pump inverter is forced to be adjusted first and an alarm signal is triggered.

[0142] Get signals in real time

[0143] Signal source: Condensate pump outlet pressure signal: collected in real time by the pressure sensor installed at the condensate pump outlet.

[0144] Control valve opening signal: collected by the control valve angle sensor or position feedback system.

[0145] Data transmission and processing: The collected signals are transmitted to the data processing module for analysis through the high-speed communication module.

[0146] The data processing module filters and corrects the signal to ensure that the analysis results are accurate and reliable.

[0147] Pressure deviation calculation and comparison: Compare the real-time pressure signal with the set pressure value to calculate the pressure deviation.

[0148] Adjust control logic, pressure deviation analysis: the actual pressure is lower than the set value, and the pump output needs to be increased or the regulating valve opening needs to be reduced.

[0149] Control parameter adjustment, inverter frequency adjustment: change the speed of the condensate pump to quickly affect the outlet pressure.

[0150] Adjustment of regulating valve opening: optimize pipeline flow distribution and refine pressure regulation.

[0151] Priority strategy when the pressure is close to the minimum threshold: when the outlet pressure is close to the minimum pressure threshold: forced priority adjustment of the inverter frequency to quickly restore the pressure.

[0152] At the same time, an alarm signal is triggered to remind the operating personnel to carry out further manual intervention.

[0153] Key control strategies for regulation logic, optimized regulation priority, inverter frequency priority:

[0154] Changing the pump speed has a quicker effect on the outlet pressure, and is suitable for giving priority to dealing with pressure anomalies in a short period of time.

[0155] For example: When the load changes dramatically, quickly increasing the pump speed can quickly compensate for insufficient pressure.

[0156] Auxiliary regulation of control valve: Control valve is mainly used for fine pressure adjustment and optimization of system efficiency.

[0157] When the pressure is close to the target value, stabilize the pressure by refining the regulating valve opening to avoid frequent changes in pump speed.

[0158] The linkage adjustment strategy dynamically adjusts the control weights of the frequency converter and the regulating valve according to the real-time pressure deviation: when the deviation is large, it relies more on the frequency converter adjustment.

[0159] When the deviation is small, more reliance is placed on control valve optimization.

[0160] Abnormal alarm mechanism, triggering conditions:

[0161] When the pressure approaches the minimum pressure threshold and exceeds the preset time (such as 2 seconds) continuously.

[0162] Alarm content: Indicates the reason for low pressure (such as abnormal pump load, pipe blockage). It is recommended that the operator check the relevant equipment or start the backup pump.

[0163] Adaptive control logic, introducing adaptive control algorithms (such as fuzzy control or neural network control): automatically and dynamically adjust the weight of the inverter frequency and the opening of the regulating valve according to pressure deviation, environmental changes, etc.

[0164] Improve adjustment accuracy and response speed.

[0165] Multivariable collaborative optimization, in closed-loop regulation, simultaneously considers: pipeline flow fluctuations, system energy consumption optimization, and actual operation requirements of the deaerator. Through multivariable optimization algorithms, the system can minimize energy consumption while meeting pressure requirements.

[0166] Data-driven intelligent diagnosis uses the collected historical data of pressure and valve opening to analyze system operation modes and identify potential abnormal trends (such as decreased efficiency due to equipment aging). It also warns of possible failures and improves system reliability.

[0167] Fault switching mechanism: when the main condensate pump cannot restore pressure through the inverter, the system automatically starts the backup pump. The switching process is smooth and ensures that the water supply to the deaerator is not interrupted.

[0168] The electronic device 200 may be a desktop computer, a notebook, a PDA, a cloud server, or other electronic device. The electronic device 200 may include, but is not limited to, a processor 201 and a memory 202. Those skilled in the art will appreciate that Figure 2 It is only an example of the electronic device 200 and does not constitute a limitation of the electronic device 200. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0169] The processor 201 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0170] The memory 202 may be an internal storage unit of the electronic device 200, for example, a hard disk or memory of the electronic device 200. The memory 202 may also be an external storage device of the electronic device 200, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 200. Further, the memory 202 may also include both an internal storage unit of the electronic device 200 and an external storage device. The memory 202 is used to store the computer program 203 and other programs and data required by the electronic device. The memory 202 may also be used to temporarily store data that has been output or is to be output.

[0171] In the embodiments provided in the present disclosure, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. Multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0172] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present disclosure implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. The computer program may include computer program code, and the computer program code may be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0173] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be included in the protection scope of the present disclosure.

Claims

1. A method for controlling the pressure of a condensate pump to supply water to a deaerator, characterized in that: The method comprises the following steps: According to the water supply pressure requirement of the deaerator, combined with the height difference between the condensate pump and the deaerator and the pipeline pressure loss, calculate the set value of the condensate pump outlet pressure; The outlet pressure of the condensate pump is monitored in real time by the pressure sensor, and the actual outlet pressure is compared with the set pressure to determine whether the water supply pressure requirement is met; When the actual outlet pressure is lower than the set pressure, adjust the operating frequency of the condensate pump inverter to increase the condensate pump outlet pressure to the set value; When the actual outlet pressure is higher than the set pressure, the condensate pump outlet pressure can be reduced and the system operating efficiency can be optimized by adjusting the opening of the deaerator water supply regulating valve; Set the minimum pressure threshold. When the condensate pump outlet pressure is lower than the minimum pressure, the control system alarm is triggered and the condensate pump inverter frequency is forced to adjust to restore the pressure to the normal range. Based on the real-time monitored outlet pressure data and regulating valve opening signal, the preset control logic is used to realize the automatic closed-loop regulation of the condensate pump and deaerator water supply system.

2. The pressure control method according to claim 1, characterized in that: The calculation formula of the set pressure is: P 设定 =P 除氧器所需 +P 管路损耗 +Δh*ρ*g, Among them, P 除氧器所需 The pressure required for the normal operation of the deaerator, P 管路损耗 is the pipeline pressure loss, Δh is the height difference between the condensate pump and the deaerator, ρ is the fluid density, and g is the gravitational acceleration.

3. The pressure control method according to claim 1, characterized in that: The pressure sensor is installed at the outlet of the condensate pump and is connected to the control system through a communication module to collect pressure signals in real time and transmit them to the control system for processing.

4. The pressure control method according to claim 1, characterized in that: When the actual outlet pressure is lower than the minimum pressure threshold and the system cannot be restored to normal pressure through inverter adjustment, the control system starts the backup condensate pump to ensure normal water supply to the deaerator.

5. The pressure control method according to claim 1, characterized in that: The control system includes a pressure sensing module, a data processing module, a frequency conversion control module and an alarm module. The data processing module compares and analyzes the collected real-time pressure signal with the set pressure. The frequency conversion control module is used to adjust the frequency of the condensate pump inverter. The alarm module is used to send a prompt signal to the operator when the pressure is abnormal.

6. The pressure control method according to claim 1, characterized in that: The automated closed-loop regulation logic includes the following steps: Obtain the condensate pump outlet pressure signal and the regulating valve opening signal in real time; Compare the outlet pressure signal with the set pressure, and adjust the condensate pump inverter frequency and regulating valve opening through control logic according to the pressure deviation until the outlet pressure reaches the set range; When the outlet pressure approaches the minimum pressure threshold, the frequency of the condensate pump inverter is forced to be adjusted first and an alarm signal is triggered.

7. An electronic device, characterized in that: include: one or more processors; A storage unit for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the pressure control method for the condensate pump to the deaerator water supply system according to any one of claims 1 to 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the pressure control method for the condensate pump to the deaerator water supply system according to any one of claims 1 to 6.

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