Industrial circulating cooling water energy-saving system, control method, device and medium

Abstract

The invention provides an industrial circulating cooling water energy-saving system, a control method, a device and a medium, and the system comprises a cooling tower, a water pump, a heat exchanger, a fan, a valve, a working condition acquisition device and an automatic control device, the cooling tower, the water pump, the heat exchanger, the working condition collecting device, the valve and the fan are sequentially connected in series through a pipeline closed loop, and the automatic control device is in communication connection with the water pump, the fan, the valve and the working condition collecting device. The automatic control device is used for receiving data acquired by the working condition acquisition device and controlling the industrial circulating cooling water energy-saving system according to the acquired data; and data acquired by the working condition acquisition device comprises a vibration signal of the fan, a temperature signal of the fan, water return pressure and the temperature of circulating cooling water in the cooling tower. By means of the industrial circulating cooling water energy-saving system, energy consumption can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of industrial circulating cooling water systems, and in particular to an industrial circulating cooling water energy-saving system, control method, device and medium. Background Art

[0002] Industrial circulating cooling water systems are widely used in various fields of process industries such as the steel industry and the chemical industry. The system uses water as a medium to perform indirect non-contact cooling and cooling of the process system medium. In existing applications, since the design of industrial circulating cooling water systems usually focuses on ensuring that the medium of the production process unit is fully cooled, the margin of the cooling tower will be reserved. In actual application, the related equipment in the system (such as cooling fans, circulating water pumps, etc.) is high-energy consumption equipment. In addition, the process operation status needs to be manually set during the operation of the system, which causes the system to waste energy, be inefficient and consume a lot of energy. Summary of the invention

[0003] The embodiments of the present application disclose an industrial circulating cooling water energy-saving system, a control method, a device and a medium, which solve the technical problems of energy waste and low efficiency and high energy consumption.

[0004] In a first aspect, the present application provides an industrial circulating cooling water energy-saving system, which includes a cooling tower, a water pump, a heat exchanger, a fan, a valve, a working condition collection device and an automatic control device, wherein the cooling tower, the water pump, the heat exchanger, the working condition collection device, the valve and the fan are connected in series in sequence through a pipeline closed loop, the automatic control device is communicatively connected with the water pump, the fan, the valve and the working condition collection device, the automatic control device receives data collected by the working condition collection device and controls the industrial circulating cooling water energy-saving system according to the collected data, wherein the data collected by the working condition collection device includes a vibration signal of the fan, a temperature signal of the fan and the cooling The return water pressure, outlet water pressure, return water temperature, outlet water temperature and cooling water flow rate of the cooling water circulating in the tower; the automatic control device also controls the fan and the water pump to work in different working states, wherein the working states include a first state, a second state and a third state, the speed of the fan in the first state is greater than or equal to the speed in the second state, the speed of the fan in the second state is less than the speed in the first state and greater than or equal to the speed in the third state; at the same time, the speed of the water pump in the first state is greater than or equal to the speed in the second state, the speed of the water pump in the second state is less than the speed in the first state and greater than or equal to the speed in the third state.

[0005] In one possible implementation, the water pump is an energy-saving variable water pump, which includes an impeller, a pump casing, a drive shaft, a first motor, inlet and outlet pipes and a hydraulic system. The impeller includes blades and a disk, and the blades are mounted on the disk. The disk is arranged on the drive shaft. One end of the drive shaft is connected to the output shaft of the first motor, and the other end is connected to the center of the impeller. The drive shaft is driven to rotate by the first motor, thereby driving the impeller to rotate. The automatic control device receives the data collected by the working condition collection device, and adjusts the hydraulic system according to the collected data to realize automatic control of the water pump.

[0006] In one possible implementation, the fan is an energy-saving cooling fan, which includes a second motor, fan blades and a frequency conversion control cabinet. The second motor is a permanent magnet synchronous motor, which is connected to the frequency conversion control cabinet. The frequency conversion control cabinet receives instructions sent by the automatic control device and outputs them to the second motor, thereby driving the fan blades to rotate by controlling the rotation of the second motor.

[0007] In one possible implementation, the frequency conversion control cabinet includes a fan monitoring device and a second motor monitoring device, the fan monitoring device is used to monitor the vibration signal of the fan in real time, and the second motor monitoring device is used to monitor the temperature signal of the second motor in real time; when the fan monitoring device monitors the vibration signal of the fan, the vibration signal is sent to the automatic control device; when the second motor monitoring device monitors the temperature signal of the second motor, the temperature signal is sent to the automatic control device.

[0008] In one possible implementation, when the automatic control device determines that the temperature signal is greater than or equal to a preset temperature, a stop command is sent to the second motor so that the second motor stops running in time; when the automatic control device determines that the vibration signal is greater than or equal to a preset vibration intensity, a stop command is sent to the second motor so that the fan stops running in time.

[0009] In one possible implementation, the operating condition acquisition device includes a temperature sensor, a transmitter and a transmitter control box. The temperature sensor is used to monitor the temperature information of the circulating cooling water in real time, and send the monitored temperature information to the transmitter, and the measured temperature information is transmitted to the automatic control device in real time through the transmitter.

[0010] In one possible implementation, the valve includes an upper tower valve and a bypass valve, wherein the upper tower valve is an electric regulating valve with adjustable opening, and the bypass valve is a switch valve. The operating condition acquisition device also includes an instrument detection unit, and the instrument detection unit sends the detected return water pressure to the automatic control device. When the automatic control device determines that the return water pressure is greater than or equal to a preset pressure, a control instruction to increase the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve increases its opening; when the automatic control device determines that the return water pressure is less than the preset pressure, a control instruction to reduce the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve reduces its opening.

[0011] In the second aspect, the present application provides a control method, which is applied to the automatic control device in the above-mentioned industrial circulating cooling water energy-saving system, and the method includes: receiving data collected by a working condition collection device, wherein the data collected by the working condition collection device includes the vibration signal of the fan, the temperature signal of the fan, the return water pressure and the temperature of the circulating cooling water in the cooling tower; controlling the industrial circulating cooling water energy-saving system according to the collected data.

[0012] In a third aspect, the present application provides a contract terms retrieval device, comprising: a receiving module for receiving a target question, wherein the target question is used to retrieve terms in a contract; and a processing module for using a target retrieval model to obtain a target answer corresponding to the terms in the target question.

[0013] In a fourth aspect, the present application provides an automatic control device, which includes a processor and a memory, and the processor implements the control method as described above when executing a computer program stored in the memory.

[0014] In a fifth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the control method as described above is implemented.

[0015] The industrial circulating cooling water energy-saving system provided in the present application includes a cooling tower, a water pump, a heat exchanger, a fan, a valve, a working condition collection device and an automatic control device, wherein the cooling tower, the water pump, the heat exchanger, the working condition collection device, the valve and the fan are connected in series in sequence through a pipeline closed loop, the automatic control device is communicatively connected with the water pump, the fan, the valve and the working condition collection device, the automatic control device receives data collected by the working condition collection device and controls the industrial circulating cooling water energy-saving system according to the collected data to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an industrial circulating cooling water energy-saving system provided in an embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of an industrial circulating cooling water energy-saving system provided in another embodiment of the present application.

[0018] Figure 3 It is a flow chart of the control method in an embodiment of the present application.

[0019] Figure 4 It is a structural diagram of the control device in the embodiment of the present application.

[0020] Figure 5 It is a structural diagram of the automatic control device in the embodiment of the present application. DETAILED DESCRIPTION

[0021] To facilitate understanding, some illustrations of concepts related to the embodiments of the present application are given by way of example for reference.

[0022] It should be noted that in this application, "at least one" means one or more, and "more than one" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0023] Usually, the industrial circulating cooling water system includes a circulating water pump, a cooling tower, a heat dissipation fan, a heat exchanger, a main pipeline, a branch pipeline, a valve and an instrument control system. The general operating principle is: after the circulating cooling water is pumped from the pool in the cooling tower to the heat exchanger through the circulating water pump, the circulating cooling water is heat-exchanged with the circulating cooling water through the medium in the heat exchanger, so that the water is heated and the medium is cooled. After the circulating cooling water flows through the heat exchanger, it returns to the cooling tower, and the water distributor installed in the cooling tower distributes the gravity effect, and the water is fully contacted with the air during the falling process to cool down. At the same time, the circulating cooling water is ventilated and dissipated by the heat dissipation fan installed on the top of the cooling tower, thereby reducing the temperature of the circulating cooling water. The heat dissipation fan can increase the volume of circulating cooling water in contact with the air and accelerate the reduction of water temperature. In general, the heat exchanger includes four ports, two of which are used to discharge circulating cooling water and discharge circulating cooling water respectively; the other two ports are used to discharge the medium and discharge the medium.

[0024] In the related art, in order to fully cool the medium in the heat exchanger, the cooling tower is designed more conservatively and the margin of the cooling tower is reserved. However, in actual operation, the cooling tower is operated in a stage of energy waste for a long time, resulting in high energy consumption. Based on this problem, the present application provides an industrial circulating cooling water energy-saving system, which can automatically control the industrial circulating cooling water energy-saving system according to the collected working condition data, reduce ineffective energy consumption, and increase energy-saving effect.

[0025] In the embodiments of the present application, Figure 1 and Figure 2 As shown, the industrial circulating cooling water energy-saving system 10 includes an automatic control device 1, a water pump 2, a heat exchanger 3, a working condition collection device 4, a valve 5, a fan 6 and a cooling tower 7. Among them, the water pump 2, the heat exchanger 3, the working condition collection device 4, the valve 5, the fan 6 and the cooling tower 7 are connected in series in sequence through a pipeline closed loop. The automatic control device 1 is connected in communication with the water pump 2, the heat exchanger 3, the working condition collection device 4, the valve 5 and the fan 6. The water pump 2 can be an energy-saving variable water pump, that is, an adjustable pump with a variable impeller, which can adjust the flow rate and pressure as needed. In an embodiment of the present application, the automatic control device 1 can be connected in communication with the water pump 2, the valve 5 and the fan 6, and can also be connected in communication with the cloud and the distributed control system (DCS). The water pump 2 can send the water pump operation data to the automatic control device 1, and the automatic control device 1 determines the control instruction according to the water pump operation data, and sends the control instruction to the water pump to control the opening of the water pump. The valve 5 can send the valve operation data to the automatic control device 1, and the automatic control device 1 determines the control instruction according to the valve operation data, and sends the control instruction to the valve 5 to control the opening of the valve 5 pump. The fan 6 can send the fan operation data to the automatic control device 1, and the automatic control device 1 determines the control instruction according to the fan operation data, and sends the control instruction to the fan to control the rotation of the fan. The present application can also send the monitored process operation data (such as pressure, flow, temperature and current, etc.) to the automatic control device 1. In the embodiment of the present application, the water pump 2 includes an impeller, a pump housing, a drive shaft, a first motor, an inlet and outlet pipes and a hydraulic system. Among them, the impeller is the core component of the water pump, which is responsible for converting mechanical energy into kinetic energy of the fluid. The impeller includes blades and a wheel disc. The number of blades is usually multiple, and multiple blades are mounted on the wheel disc, which is arranged on the drive shaft. One end of the drive shaft is connected to the output shaft of the first motor, and the other end is connected to the center of the impeller, and the drive shaft can be driven to rotate by the first motor, thereby driving the impeller to rotate. The drive shaft needs to have sufficient strength and rigidity to withstand torque and vibration during operation. It should be noted that the angle or position of the blades mounted on the wheel disc can be adjusted.

[0026] In the embodiment of the present application, the pump housing is used to accommodate the impeller, the drive shaft, the first motor, the inlet and outlet pipes and the hydraulic system. The pump housing provides a path for the circulating cooling water to flow and protects the internal components from the external environment.

[0027] In the embodiment of the present application, the first motor is the power source of the water pump 2, and drives the impeller to rotate through the drive shaft. The first motor can be an AC motor or a DC motor, and the present application does not limit this.

[0028] In the embodiment of the present application, the inlet and outlet pipes include an inlet pipe and an outlet pipe. The inlet pipe is connected to the suction port of the water pump to allow the circulating cooling water to enter the water pump. The outlet pipe is connected to the pressure port of the water pump to transport the circulating cooling water to other parts of the hydraulic system. The inlet pipe is usually made of metal or high-strength plastic to ensure the safe transmission of the circulating cooling water.

[0029] In an embodiment of the present application, the hydraulic system includes valves, actuators and other components that work together to control the flow and pressure of circulating cooling water. The hydraulic system is connected to the water pump and is used to adjust the impeller opening of the water pump, thereby changing the operating efficiency of the water pump. The hydraulic system is implemented by configuring a field programmable logic controller (PLC) inside the water pump. For example, the impeller opening of the water pump can be adjusted through the hydraulic system, the operating efficiency of the water pump can be changed, and the operating pumping outlet pressure and pumping flow of the process can be changed synchronously.

[0030] In the embodiment of the present application, the automatic control device 1 is used to monitor and adjust the parameters of the water pump 2. For example, the parameters of the water pump 2 include flow, pressure, temperature, etc. The automatic control device 1 is connected to the hydraulic system, and the automatic control device 1 can receive the collected working condition data (for example, the collected flow, pressure and temperature of the variable pump), and adjust the hydraulic system according to the collected working condition data to realize automatic control of the water pump 2.

[0031] In some embodiments of the present application, the hydraulic system in the water pump 2 receives a preset signal sent by the automatic control device 1, wherein the preset signal is used to control the opening of the water pump 2. After receiving the preset signal, the difference between the first opening in the preset signal and the second opening of the current water pump 2 is determined, and the solenoid valve is triggered to control the oil pressure trend in the hydraulic system to determine whether to increase or decrease the opening according to the difference between the first opening and the second opening. For example, when the first opening is less than the second opening, it is determined to reduce the opening; when the first opening is greater than the second opening, it is determined to increase the opening. It should be noted that the PLC in the hydraulic system can be used to control the increase and / or decrease of the opening, and the first opening in the preset signal sent by the automatic control device 1 is compared with the current second opening, and the increase and / or decrease of the opening is executed according to the comparison result. The signal of the water pump can also be uploaded to the automatic control device 1 through the PLC in the hydraulic system. In one embodiment, the preset signal is a 4mA-20mA current signal.

[0032] In the embodiment of the present application, the first motor drives the impeller to rotate through the drive shaft, and the impeller generates a pressure difference in the pump housing, pushing the circulating cooling water to flow in from the inlet pipe and out through the outlet pipe. The hydraulic system adjusts the flow and pressure of the circulating cooling water according to the instructions of the automatic control device 1. This enables the water pump 2 to provide stable flow and pressure under different working conditions to meet the needs of the hydraulic system.

[0033] In the embodiment of the present application, by adopting an energy-saving variable pump, the pumping flow of the water pump can be adjusted autonomously to improve the operating efficiency of the water pump. Compared with other designs that mainly use frequency converters to control water pumps, the present application reduces the links of electrical and auxiliary facilities, and reduces the operating and maintenance costs and maintenance costs. Specifically, the start and stop of the water pump 2 is controlled by the frequency converter. Due to the reduction in frequency, the output speed of the first motor is reduced. When the impeller diameter of the water pump 2 remains unchanged, the speed reduction reduces the water pressure head, and the requirements of the normal production process cannot be guaranteed. The adjustable impeller variable pump used in the present application changes this link, so that when the power supply frequency of the first motor is 50HZ, the impeller diameter of the water pump 2 remains unchanged, and the water pressure head does not change substantially after the opening on the axis becomes larger or smaller. Therefore, the industrial circulating cooling water energy-saving system provided by the present application is very suitable for industrial circulating cooling water energy-saving systems with energy-saving adjustment requirements, but with strict requirements on the water pressure head of the outlet tower.

[0034] In an embodiment of the present application, the fan 6 is an energy-saving cooling fan. The fan 6 includes a second motor, fan blades and a frequency conversion control cabinet. The second motor can be a permanent magnet synchronous motor. The second motor is connected to the frequency conversion control cabinet, and the frequency conversion control cabinet receives the instruction sent by the automatic control device and outputs it to the second motor, and drives the fan blades to rotate by controlling the rotation of the second motor. Specifically, the automatic control device sends a control instruction to control the operating rate of the fan 6. For example, the frequency conversion control cabinet receives the instruction sent by the automatic control device, and requests the frequency conversion control cabinet to reduce the power supply frequency of the second motor from 18HZ to 0hz, so that the speed of the fan is gradually reduced to zero. Specifically, the frequency conversion control cabinet receives the control instruction sent by the automatic control device, and sends the control instruction to the frequency converter, which converts the control instruction into a corresponding frequency setting value through the frequency converter, and sends it to the second motor, so that the second motor changes the power supply frequency to accurately control the speed of the fan.

[0035] In an embodiment of the present application, the frequency conversion control cabinet includes a fan monitoring device and a second motor monitoring device. The fan monitoring device is used to monitor the vibration signal of the fan 6 in real time, and the second motor monitoring device is used to monitor the temperature signal of the second motor in real time. In some embodiments, the fan monitoring device can be a vibration sensor, and the second motor monitoring device can be a temperature sensor. When the fan monitoring device detects the vibration signal of the fan, the vibration signal is sent to the automatic control device 1; when the second motor monitoring device detects the temperature signal of the second motor, the temperature signal is sent to the automatic control device 1. The temperature signal and the vibration signal are monitored in real time by the automatic control device 1 to ensure that the fan operates in the most ideal working condition.

[0036] For example, when the automatic control device 1 determines that the temperature signal is greater than or equal to the preset temperature, it is determined that the second motor is not operating normally and needs to be stopped. The automatic control device 1 sends a stop command to the second motor so that the second motor stops running in time. When the automatic control device 1 determines that the temperature signal is less than the preset temperature, it is determined that the second motor is operating normally, there is no need to stop the second motor, and the automatic control device 1 does not perform any operation. When the automatic control device 1 determines that the vibration signal is greater than or equal to the preset vibration intensity, it is determined that the fan is not operating normally and needs to be stopped. The automatic control device 1 sends a stop command to the second motor so that the fan stops running in time. When the automatic control device 1 determines that the vibration signal is less than the preset vibration intensity, it is determined that the fan is operating normally and there is no need to stop the fan. The automatic control device 1 does not perform any operation.

[0037] In one embodiment of the present application, the fan 6 also includes a transmission control cabinet. The transmission control cabinet includes multiple modules. For example, a frequency converter, a primary circuit and protection, a secondary circuit module, and a monitoring module. Among them, the secondary circuit module is used to interact with the automatic control device 1. For example, the automatic control device 1 outputs a switch signal (normally open or normally closed contact) to control the start and stop of the fan 6. The frequency converter is arranged in the frequency converter cabinet and is connected to the second motor through a cable. The second motor includes a sensor protection device, which includes a temperature thermistor of a three-phase stator and a shaft temperature thermistor at the front and rear ends. During the operation of the fan 6, the sensor protection device sends the thermistor signal to the secondary circuit module in the transmission control cabinet, and the secondary circuit module then converts the thermistor signal into a 4mA-20mA current signal and sends it to the automatic control device 1. After receiving the current signal, the automatic control device 1 determines the operating status of the fan 6 according to the current signal. If the automatic control device 1 determines that the current signal is greater than or equal to the preset current value, it determines that the fan 6 is in an abnormal state and requires a warning or shutdown state, then the signal to be sent to the inverter is changed to control the stop of the fan to protect the fan; if the automatic control device 1 determines that the current signal is less than the preset current value, it determines that the fan 6 is in a normal operating state and no operation is required.

[0038] In the embodiment of the present application, the working condition acquisition device 4 includes a temperature sensor, a transmitter and a transmitter electric control box. The temperature sensor can be used to monitor the temperature of the circulating cooling water in real time, and send the monitored temperature information to the transmitter, and the measured temperature information is transmitted to the automatic control device 1 in real time through the transmitter. Among them, the transmitter electric control box is used to power the working condition acquisition device 4 and provide on-site protection.

[0039] In the embodiment of the present application, the valve 5 includes an upper tower valve and a bypass valve. Among them, the upper tower valve is an adjustable opening electric regulating valve, and the bypass valve is a switch valve. The instrument detection unit sends the detected return water pressure to the automatic control device. When the automatic control device 1 determines that the return water pressure is greater than or equal to the preset pressure, a control instruction to increase the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve increases the opening; when the automatic control device 1 determines that the return water pressure is less than the preset pressure, a control instruction to reduce the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve reduces the opening. Generally, the larger the opening of the upper tower valve, the more energy-saving the industrial circulating cooling water energy-saving system 10. Because the water pump 2 provides power consumption, after heat exchange, it returns to the upper tower valve. If the valve 5 is too small, a lot of energy is lost on the valve 5. So the larger the opening of the valve 5, the better. But in actual application, the valve 5 is too large, the return water pipeline is not pressured, and it is easy to make the heat exchanger 3 underpressure. Different systems have different pipe diameters and pumping capacities, and the corresponding openings of the upper tower valves are also different. This application facilitates centralized control and improves system efficiency by setting an adjustable opening electric regulating valve.

[0040] In one embodiment of the present application, the valve 5 may be a constant pressure valve unit, including a valve body mechanism unit and an adjustable electric control actuator. The valve body mechanism unit is connected to the adjustable electric control actuator through a mechanical mechanism. The automatic control device 1 may communicate with the adjustable electric control actuator of the valve 5, and the adjustable electric control actuator feeds back the valve body opening of the valve 5 to the automatic control device 1. The valve body opening is a certain quantity, and only a specific opening signal will be transmitted to the adjustable electric control actuator at any opening. After the automatic control device 1 receives the feedback signal (4mA-20mA current signal) from the valve opening feedback unit in the adjustable electric control actuator, it determines whether the valve opening needs to be adjusted. If it is determined that the valve opening needs to be adjusted, the valve opening signal (4mA-20mA current signal) is sent to the adjustable electric control actuator, and the valve is opened or reduced by the adjustable electric control actuator to adjust the required opening. In the embodiment of the present application, the working condition acquisition device 4 also includes a vibration sensor and an instrument detection unit. The vibration sensor is used to monitor the vibration signal of the fan, and the instrument detection unit is used to detect the return water pressure.

[0041] In the embodiment of the present application, the automatic control device 1 receives the data collected by the working condition collection device, and controls the industrial circulating cooling water energy-saving system 10 according to the collected data. Specifically, the data collected by the working condition collection device 4 include the vibration signal of the fan 6, the temperature signal of the fan, and the return water pressure, outlet water pressure, return water temperature, outlet water temperature, cooling water flow rate, etc. of the circulating cooling water in the cooling tower.

[0042] In one embodiment, the working condition acquisition device further includes a pressure sensor and a transmitter disposed in the transmission electric control box. The pressure sensor is used to monitor the pipeline pressure information of the circulating cooling water in real time, and send the monitored pipeline pressure information to the transmitter, and the measured pipeline pressure information is transmitted to the automatic control device in real time through the transmitter.

[0043] The working condition acquisition device also includes a flow meter, which is used to monitor the pipeline flow information of the circulating cooling water in real time and transmit the monitored pipeline flow information to the automatic control device in real time.

[0044] When the automatic control device 1 determines that the vibration signal is greater than or equal to the preset vibration intensity, it is determined that the fan 6 is operating abnormally and needs to be stopped. The automatic control device 1 sends a stop command to the second motor to stop the fan 6 in time; when the automatic control device 1 determines that the temperature signal is greater than or equal to the preset temperature, it is determined that the second motor is operating abnormally and needs to be stopped. The automatic control device 1 sends a stop command to the second motor to stop the second motor in time; when the automatic control device 1 determines that the return water pressure is greater than or equal to the preset pressure, the automatic control device 1 sends a control command to increase the opening of the upper tower valve to the upper tower valve, so that the upper tower valve increases the opening; when the automatic control device 1 determines that the return water pressure is less than the preset pressure, the automatic control device 1 sends a control command to reduce the opening of the upper tower valve to the upper tower valve, so that the upper tower valve reduces the opening.

[0045] In the embodiment of the present application, the automatic control device 1 can also control the fan 6 and the water pump 2 to work in different working states. For example, the working state includes a first state, a second state and a third state. Among them, the rotation speed of the fan and the rotation speed of the water pump are different in each state. The rotation speed of the fan 6 in the first state is greater than or equal to the rotation speed in the second state, and the rotation speed of the fan 6 in the second state is less than the rotation speed in the first state and greater than or equal to the rotation speed in the third state; at the same time, the rotation speed of the water pump 2 in the first state is greater than or equal to the rotation speed in the second state, and the rotation speed of the water pump 2 in the second state is less than the rotation speed in the first state and greater than or equal to the rotation speed in the third state. The fan 6 and the water pump 2 consume the most energy when working in the first state; the fan 6 and the water pump 2 are the most energy-saving when working in the third state; the energy consumption of the fan 6 and the water pump 2 is moderate when working in the second state.

[0046] In an embodiment of the present application, the rotational speed of the fan 6 and the water pump 2 when operating in the first state, the second state or the third state and the opening degree of the water pump 2 can be pre-set by the automatic control device 1 and solidified into specific parameters for automatic operation of the industrial circulating cooling water energy-saving system 10.

[0047] In some embodiments, the working state of the fan 6 and the water pump 2 can also be set to multiple states, which is not limited in this application. For example, when the number of fans and water pumps in the industrial circulating cooling water energy-saving system 10 increases, five or seven working states of the fans and water pumps can be set.

[0048] See also Figure 3 , Figure 3 The flowchart of the control method according to one embodiment of the present application. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted. In this embodiment, the control method is applied to an automatic control device. The control method may include the following steps.

[0049] Step S1: receiving data collected by the operating condition collection device 4, wherein the data collected by the operating condition collection device 4 includes a vibration signal of the fan 6, a temperature signal of the second motor, a return water pressure, and a temperature of circulating cooling water.

[0050] In an embodiment of the present application, the working condition acquisition device 4 includes a temperature sensor, a transmitter and a transmitter electric control box. The temperature sensor can be used to monitor the temperature of the circulating cooling water in real time, and send the monitored temperature information to the transmitter, and the measured temperature information is transmitted to the automatic control device in real time through the transmitter. Among them, the transmitter electric control box is used to power the working condition acquisition device and provide on-site protection. The working condition acquisition device also includes a vibration sensor and an instrument detection unit. The vibration sensor is used to monitor the vibration signal of the fan, and the instrument detection unit is used to detect the return water pressure. The working condition acquisition device sends the collected data to the automatic control device.

[0051] Step S2: Control the industrial circulating cooling water energy-saving system 10 according to the collected data.

[0052] In an embodiment of the present application, when the automatic control device 1 determines that the vibration signal is greater than or equal to a preset vibration intensity, it is determined that the fan 6 is operating abnormally and needs to be stopped. The automatic control device 1 sends a stop command to the fan 6, so that the fan 6 stops running in time; when the automatic control device 1 determines that the temperature signal is greater than or equal to the preset temperature, it is determined that the second motor is operating abnormally and needs to be stopped. The automatic control device 1 sends a stop command to the second motor, so that the second motor stops running in time; when the automatic control device 1 determines that the return water pressure is greater than or equal to the preset pressure, the control command to increase the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve increases the opening; when the automatic control device 1 determines that the return water pressure is less than the preset pressure, the control command to reduce the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve reduces the opening.

[0053] Figure 4 400 may include a plurality of functional modules composed of computer program segments. The computer program of each program segment in the control device 400 may be stored in a memory of a computer device and executed by at least one processor to execute (see Figure 3 Description) control function.

[0054] In this embodiment, the control device 400 can be divided into multiple functional modules according to the functions it performs. The functional modules may include: a receiving module 401 and a control module 402. The module referred to in this application refers to a series of computer program segments that can be executed by at least one processor and can complete fixed functions, which are stored in a memory. In this embodiment, the control device 400 can be used to implement the following Figure 3The control method shown in Figure 2 As shown, the control device 400 is applied to a computer device (such as Figure 1 In the automatic control device shown in FIG. 1 , the control device 400 includes: The receiving module 401 is used to receive data collected by the working condition collection device, wherein the data collected by the working condition collection device includes a vibration signal of the fan, a temperature signal of the second motor, a return water pressure, and a temperature of the circulating cooling water; The control module 402 is used to control the industrial circulating cooling water energy-saving system according to the collected data.

[0055] Figure 5 1 is a schematic diagram of the structure of a computer device provided in an embodiment of the present application. As shown in the figure, the automatic control device 1 can be a server, for example, the automatic control device 1 can be a central server, an edge server, or a local server of a local data center. Each automatic control device 1 may include a communication module 101, a memory 102, a processor 103, an input / output (I / O) interface 104 and a bus 105. The processor 103 is coupled to the communication interface 101, the memory 102, and the I / O interface 104 respectively through the bus 105.

[0056] The communication module 101 may include a wired communication module and / or a wireless communication module. The wired communication module may provide one or more wired communication solutions such as universal serial bus (USB), controller area network bus (CAN, Controller Area Network). The wireless communication module may provide one or more wireless communication solutions such as wireless fidelity (wireless fidelity, Wi-Fi), bluetooth (bluetooth, BT), mobile communication network, frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR), etc.

[0057] The memory 102 may include one or more random access memories (RAM) and one or more non-volatile memories (NVM). The random access memory can be directly read and written by the processor 103, and can be used to store executable programs (such as machine instructions) of the operating system or other running programs, and can also be used to store user and application data. The random access memory may include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), etc.

[0058] The non-volatile memory may also store executable programs and user and application data, etc., and may be loaded into the random access memory in advance for direct reading and writing by the processor 103. The non-volatile memory may include a disk storage device and a flash memory.

[0059] The memory 102 is used to store one or more computer programs. The one or more computer programs are configured to be executed by the processor 103. The one or more computer programs include multiple instructions, and when the multiple instructions are executed by the processor 103, the sensitive information processing method and the contract clause retrieval method executed on the automatic control device 1 can be implemented.

[0060] In other embodiments, the automatic control device 1 further includes an external memory interface for connecting to an external memory to expand the storage capacity of the automatic control device 1 .

[0061] The processor 103 may include one or more processing units, for example, the processor 103 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0062] The processor 103 provides computing and control capabilities. For example, the processor 103 is used to execute computer programs stored in the memory 102 .

[0063] The I / O interface 104 is used to provide a channel for user input or output. For example, the I / O interface 104 can be used to connect various input and output devices, such as a mouse, keyboard, touch device, display screen, etc., so that the user can enter information or visualize information.

[0064] The bus 105 is at least used to provide a channel for mutual communication among the communication module 101 , the memory 102 , the processor 103 , and the I / O interface 104 in the automatic control device 1 .

[0065] It is understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the automatic control device 1. In other embodiments of the present application, the automatic control device 1 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0066] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. The computer program includes program instructions. The method implemented when the program instructions are executed can refer to the methods in the above-mentioned embodiments of the present application.

[0067] The computer-readable storage medium may be an internal memory of the electronic device described in the above embodiment, such as a hard disk or memory of the electronic device. The computer-readable storage medium may also be an external storage device of the electronic device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device.

[0068] In some embodiments, the computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function, etc.; the data storage area may store data created according to the use of the electronic device, etc.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0071] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0072] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such 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 application, and should all be included in the protection scope of the present application.

Claims

1. An industrial circulating cooling water energy-saving system, characterized in that: It includes a cooling tower, a water pump, a heat exchanger, a fan, a valve, a working condition collection device and an automatic control device, wherein the cooling tower, the water pump, the heat exchanger, the working condition collection device, the valve and the fan are sequentially connected in series through a pipeline closed loop, the automatic control device is in communication connection with the water pump, the fan, the valve and the working condition collection device, the automatic control device receives the data collected by the working condition collection device and controls the industrial circulating cooling water energy-saving system according to the collected data, wherein the data collected by the working condition collection device includes the vibration signal of the fan, the temperature signal of the fan and the return water pressure, outlet water pressure, return water temperature, outlet water temperature and cooling water flow of the circulating cooling water in the cooling tower; The automatic control device also controls the fan and the water pump to operate in different working states, wherein the working states include a first state, a second state and a third state, the speed of the fan in the first state is greater than or equal to the speed in the second state, the speed of the fan in the second state is less than the speed in the first state and greater than or equal to the speed in the third state; at the same time, the speed of the water pump in the first state is greater than or equal to the speed in the second state, the speed of the water pump in the second state is less than the speed in the first state and greater than or equal to the speed in the third state.

2. The industrial circulating cooling water energy-saving system according to claim 1, characterized in that: The water pump is an energy-saving variable water pump, which includes an impeller, a pump casing, a drive shaft, a first motor, inlet and outlet pipes and a hydraulic system. The impeller includes blades and a disk, and the blades are mounted on the disk. The disk is arranged on the drive shaft. One end of the drive shaft is connected to the output shaft of the first motor, and the other end is connected to the center of the impeller. The drive shaft is driven to rotate by the first motor, thereby driving the impeller to rotate. The automatic control device receives the data collected by the working condition collection device, and adjusts the hydraulic system according to the collected data to realize automatic control of the water pump.

3. The industrial circulating cooling water energy-saving system according to claim 1 is characterized in that: The fan is an energy-saving cooling fan, and the fan includes a second motor, fan blades and a frequency conversion control cabinet. The second motor is a permanent magnet synchronous motor, and the second motor is connected to the frequency conversion control cabinet. The frequency conversion control cabinet receives the instructions sent by the automatic control device and outputs them to the second motor, and drives the fan blades to rotate by controlling the rotation of the second motor.

4. The industrial circulating cooling water energy-saving system according to claim 3 is characterized in that: The frequency conversion control cabinet includes a fan monitoring device and a second motor monitoring device, wherein the fan monitoring device is used to monitor the vibration signal of the fan in real time, and the second motor monitoring device is used to monitor the temperature signal of the second motor in real time; when the fan monitoring device monitors the vibration signal of the fan, the vibration signal is sent to the automatic control device; When the second motor monitoring device monitors the temperature signal of the second motor, the temperature signal is sent to the automatic control device.

5. The industrial circulating cooling water energy-saving system according to claim 4 is characterized in that: When the automatic control device determines that the temperature signal is greater than or equal to the preset temperature, a stop command is sent to the second motor so that the second motor stops running in time; when the automatic control device determines that the vibration signal is greater than or equal to the preset vibration intensity, a stop command is sent to the second motor so that the fan stops running in time.

6. The industrial circulating cooling water energy-saving system according to claim 1, characterized in that: The working condition acquisition device includes a temperature sensor, a transmitter and a transmitter control box. The temperature sensor is used to monitor the temperature information of the circulating cooling water in real time, and send the monitored temperature information to the transmitter, and the measured temperature information is transmitted to the automatic control device in real time through the transmitter.

7. The industrial circulating cooling water energy-saving system according to claim 5, characterized in that: The valve comprises an upper tower valve and a bypass valve, wherein the upper tower valve is an electric regulating valve with adjustable opening, and the bypass valve is a switch valve. The operating condition acquisition device also comprises an instrument detection unit, and the instrument detection unit sends the detected return water pressure to the automatic control device. When the automatic control device determines that the return water pressure is greater than or equal to the preset pressure, a control instruction for increasing the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve increases its opening; when the automatic control device determines that the return water pressure is less than the preset pressure, a control instruction for reducing the opening of the upper tower valve is sent to the upper tower valve, so that the upper tower valve reduces its opening.

8. A control method, applied to the automatic control device in the industrial circulating cooling water energy-saving system according to any one of claims 1 to 7, characterized in that: The method comprises: Receiving data collected by a working condition collection device, wherein the data collected by the working condition collection device includes a vibration signal of the fan, a temperature signal of the fan, and a return water pressure, an outlet water pressure, a return water temperature, an outlet water temperature, and a cooling water flow rate of circulating cooling water in the cooling tower; The industrial circulating cooling water energy-saving system is controlled according to the collected data.

9. An automatic control device, characterized in that: The automatic control device comprises a processor and a memory, and the processor implements the control method according to claim 8 when executing the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the control method according to claim 8 is implemented.

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