An adaptive energy-saving control method and system for falling film evaporator

Abstract

The application relates to a self-adaptive energy-saving control method and system of a falling film evaporator, and relates to the field of power control. The method comprises the following steps: acquiring temperature values of multiple preset positions in an evaporation chamber, the density of concentrated liquid in a separation chamber, drop video information at the top of the separation chamber, infrared imaging video at the top of the separation chamber and the power of a compression fan; if there is a first target position with a temperature value lower than a preset temperature threshold, determining a target steam pipeline from multiple standby steam pipelines based on the temperature value of the first target position, the drop video information and the density; determining a target power required by the compression fan based on the temperature value of each first target position and the infrared imaging video; controlling the compression fan to operate at the target power; and controlling the target steam pipeline to be opened. The application can improve the energy-saving effect of the compression fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power control, in particular to an adaptive energy-saving control method and system of falling film evaporator. BACKGROUND

[0002] MVR falling film evaporator is a new type of efficient energy-saving evaporation equipment mainly used in pharmaceutical industry, etc. The equipment uses low temperature and low pressure steaming technology and clean energy as energy to produce steam, separates water in medium through heat absorption and conversion, and obtains concentrated liquid with required concentration or density. MVR falling film evaporator can utilize the steam obtained by heat absorption and conversion of medium to achieve secondary utilization. The steam is worked by a compression fan to improve the temperature of the steam, and then the steam is transported to the evaporation chamber through a pipeline to perform heat absorption and conversion again to achieve energy-saving effect. Therefore, in the energy use of MVR falling film evaporator, the electric energy use of the compression fan accounts for a large proportion. However, with the requirement of society and industry for green energy saving and the shortage of electric power resources, how to further improve the energy-saving effect of the compression fan becomes a problem. SUMMARY

[0003] In order to improve the energy-saving effect of the compression fan, the present application provides an adaptive energy-saving control method and system of falling film evaporator.

[0004] In a first aspect, the present application provides an adaptive energy-saving control method of falling film evaporator, which adopts the following technical solution:

[0005] An adaptive energy-saving control method of falling film evaporator, comprising:

[0006] obtaining temperature values of a plurality of preset positions in the evaporation chamber, density of concentrated liquid in the separation chamber, dripping video information at the top of the separation chamber, infrared imaging video at the top of the separation chamber, and power of the compression fan;

[0007] if there is a first target position with a temperature value lower than a preset temperature threshold, determining a target steam pipeline from a plurality of standby steam pipelines based on the temperature value of the first target position, the dripping video information, and the density;

[0008] determining a target power required by the compression fan based on the temperature value of each first target position and the infrared imaging video;

[0009] controlling the compression fan to operate at the target power, and controlling the target steam pipeline to be opened.

[0010] By adopting the technical scheme, the first target position with a temperature value lower than the preset temperature threshold indicates that the moisture evaporation effect of the material in the evaporation chamber is reduced, which leads to reduced quality of the steam formed in the separation chamber and reduced quality of the concentrated liquid. Therefore, the target steam pipeline is determined from the multiple standby steam pipelines according to the temperature value of the first target position, the drop video information, and the density. The infrared imaging video represents the specific situation and quality of the steam formed in the separation chamber. Therefore, the target power required by the compression fan is determined according to the temperature value of the first target position and the infrared imaging video, the power of the compression fan is improved, the compression fan works on the steam to increase the temperature of the steam, thereby compensating for the temperature of the first target position in the evaporation chamber. The target power of appropriate size is determined by the temperature value of the first target position and the infrared imaging video, the compression fan is controlled to operate according to the target power, and the target steam pipeline is controlled to be opened, thereby performing temperature compensation. If the target power is too large, the use of electric energy will increase, and if the target power is too small, the temperature compensation effect will be poor. Therefore, determining the appropriate target power can achieve the effect of energy saving while performing temperature compensation. In combination with the determined appropriate target steam pipeline, the energy loss of the steam in the temperature compensation process is reduced, thereby further achieving the effect of energy saving.

[0011] In another possible implementation manner, the target steam pipeline is determined from the multiple standby steam pipelines based on the temperature value of the first target position, the drop video information, and the density, and includes the following steps.

[0012] A temperature difference value between the temperature value of each first target position and a preset temperature threshold is determined, and a first average value of the temperature difference value is determined.

[0013] Feature recognition is performed on each frame of picture of the drop video information to obtain a first number of complete liquid drops dropped by each heat exchange pipe in each frame of picture and a second number of complete liquid drops in each frame of picture.

[0014] A drop frequency of all heat exchange pipes as a whole is determined based on the first number, and a second average value of the second number is calculated.

[0015] A required number of standby steam pipelines required is determined based on the first average value, the drop frequency, and the second average value.

[0016] If the required number is less than the number of first target positions, distances from each standby steam pipeline to each first target position are calculated, and an average distance corresponding to each standby steam pipeline is calculated based on the distances.

[0017] The first required number of standby steam pipelines with the smallest average distance are determined as the target steam pipelines.

[0018] In another possible implementation manner, the determining of the target power required by the compression fan based on the temperature value of each first target position and the infrared imaging video comprises:

[0019] determining the steam volume and the steam average temperature of the heat exchange pipe based on the infrared imaging video;

[0020] calculating a first similarity between each two adjacent frames of the infrared imaging video and a second similarity between each frame and a preset frame;

[0021] determining a variance of the first similarity and a similarity average of the second similarity;

[0022] determining a first score based on the variance, the similarity average, the steam volume and the steam average temperature;

[0023] determining a temperature difference between the temperature value of each first target position and a preset temperature threshold, and determining a second score based on the temperature difference and the number of the first target positions;

[0024] determining the target power required by the compression fan based on the first score and the second score.

[0025] In another possible implementation manner, the method further comprises:

[0026] obtaining a drop frequency and calculating a ratio of the first score to the drop frequency;

[0027] determining a corresponding relationship between the ratio and a current power of the compression fan;

[0028] generating a training sample set based on the corresponding relationship to train a target network model, the target network model being constructed based on the ratio of the first score to the drop frequency and the current power of the compression fan.

[0029] In another possible implementation manner, each of the standby steam pipelines is provided with a rotatable guide plate at an end close to the evaporation chamber, and the target steam pipeline is controlled to be opened, and the method further comprises:

[0030] if the required number is less than the number of the first target positions, determining an angle of each first target position relative to an associated target steam pipeline, the associated target steam pipeline being a target steam pipeline corresponding to each first target position and having the smallest distance;

[0031] if there is a second target position having an angle greater than a preset angle threshold in the first target positions, determining a rotation angle of the guide plate on the associated target steam pipeline corresponding to the second target position based on the angle;

[0032] determine a first target position corresponding to the second target position and covered by the associated target steam pipeline;

[0033] determine a ratio of a temperature difference of the covered first target position and a temperature difference of the second target position;

[0034] determine a duration of the guide vane of the associated target steam pipeline after the rotation angle based on the ratio.

[0035] In another possible implementation manner, the method further includes:

[0036] map the correspondence in a preset coordinate system, and output the mapped preset coordinate system;

[0037] output the drop video information and the infrared imaging video.

[0038] In a second aspect, the application provides a self-adaptive energy-saving control device for falling film evaporators, which adopts the following technical scheme:

[0039] A self-adaptive energy-saving control device for falling film evaporators, comprising:

[0040] a first acquisition module configured to acquire temperature values of a plurality of preset positions in an evaporation chamber, a density of concentrated liquid in a separation chamber, drop video information at the top of the separation chamber, infrared imaging video at the top of the separation chamber, and power of a compression fan;

[0041] a standby pipeline determination module configured to determine a target steam pipeline from a plurality of standby steam pipelines based on the temperature values, the drop video information, and the density of the first target position when there is a first target position with a temperature value lower than a preset temperature threshold;

[0042] a power determination module configured to determine a target power required by the compression fan based on the temperature values and the infrared imaging video of each first target position;

[0043] a control module configured to control the compression fan to operate at the target power and control the target steam pipeline to be opened.

[0044] By adopting the technical scheme, the first acquisition module acquires the temperature values of the plurality of preset positions in the evaporation chamber, the density of the concentrated liquid in the separation chamber, the drip video information of the top of the separation chamber, the infrared imaging video of the top of the separation chamber, and the power of the compression fan. If there is a first target position with a temperature value lower than a preset temperature threshold, it indicates that the moisture evaporation effect of the material in the evaporation chamber is reduced, resulting in reduced steam formation quality and reduced concentrated liquid quality in the separation chamber. Therefore, the standby pipeline determination module determines the target steam pipeline from the plurality of standby steam pipelines based on the temperature value, the drip video information, and the density of the first target position. The infrared imaging video represents the specific situation and quality of steam formation in the separation chamber. Therefore, the power determination module determines the target power required by the compression fan based on the temperature value of the first target position and the infrared imaging video. The power of the compression fan is increased, the compression fan works on the steam to increase the temperature of the steam, thereby compensating for the temperature of the first target position in the evaporation chamber. The temperature value of the first target position and the infrared imaging video can be used to determine the appropriate target power. The control module controls the compression fan to operate at the target power, and controls the target steam pipeline to open, thereby performing temperature compensation. If the target power is too large, the use of electric energy will increase, and if the target power is too small, the temperature compensation effect will be poor. Therefore, determining the appropriate target power can achieve the effect of energy saving while performing temperature compensation. In combination with the determined appropriate target steam pipeline, the loss of steam energy during temperature compensation is reduced, thereby further achieving the effect of energy saving.

[0045] In another possible implementation, when the standby pipeline determination module determines the target steam pipeline from the plurality of standby steam pipelines based on the temperature value, the drip video information, and the density of the first target position, the standby pipeline determination module is specifically configured to:

[0046] determine a temperature difference between the temperature value of each first target position and a preset temperature threshold, and determine a first average value of the temperature difference;

[0047] perform feature recognition on each frame of picture of the drip video information to obtain a first number of complete liquid drops dripped by each heat exchange tube in each frame of picture, and a second number of complete liquid drops in each frame of picture;

[0048] determine a drip frequency of all heat exchange tubes based on the first number, and calculate a second average value of the second number;

[0049] determine a required number of required standby steam pipelines based on the first average value, the drip frequency, and the second average value;

[0050] if the required number is less than the number of first target positions, calculate a distance from each standby steam pipeline to each first target position, and calculate an average distance corresponding to each standby steam pipeline based on the distance.

[0051] The target steam pipeline is determined as the steam pipeline with the minimum average distance among the required number of standby steam pipelines.

[0052] In another possible implementation, the power determination module is specifically configured for:

[0053] determining the steam volume and the average steam temperature of the heat exchange pipe based on the infrared imaging video;

[0054] calculating a first similarity between each two adjacent frames of the infrared imaging video and a second similarity between each frame and a preset frame;

[0055] determining a variance of the first similarity and a similarity average of the second similarity;

[0056] determining a first score based on the variance, the similarity average, the steam volume and the average steam temperature;

[0057] determining a temperature difference between the temperature value of each first target position and a preset temperature threshold, and determining a second score based on the temperature difference and the number of first target positions;

[0058] determining the target power required by the compression fan based on the first score and the second score.

[0059] In another possible implementation, the device further includes:

[0060] a second acquisition module configured to acquire a drop frequency and calculate a ratio of the first score to the drop frequency;

[0061] a corresponding relationship determination module configured to determine a corresponding relationship between the ratio and the current power of the compression fan;

[0062] a generation module configured to generate a training sample set based on the corresponding relationship, so as to train a target network model, the target network model being constructed based on the ratio of the first score to the drop frequency and the current power of the compression fan.

[0063] In another possible implementation, each standby steam pipeline is provided with a rotatable deflector plate at one end close to the evaporation chamber, and the device further includes:

[0064] an angle determination module configured to determine an angle formed by each first target position and an associated target steam pipeline when the required number is less than the number of first target positions, the angle formed by the associated target steam pipeline being an angle formed by a target steam pipeline closest to each first target position.

[0065] a rotation angle determination module, configured to determine a rotation angle of a guide vane on a target steam pipeline corresponding to the second target position based on an angle when the second target position with an angle greater than a preset angle threshold exists in the first target positions;

[0066] a position determination module, configured to determine a first target position covered by a target steam pipeline corresponding to the second target position;

[0067] a proportion determination module, configured to determine a proportion of a temperature difference value of the covered first target position and a temperature difference value of the second target position;

[0068] a duration determination module, configured to determine a duration of the guide vane of the target steam pipeline after the rotation angle based on the proportion.

[0069] In another possible implementation, the device further includes:

[0070] a first output module, configured to map the corresponding relationship in a preset coordinate system and output the mapped preset coordinate system;

[0071] a second output module, configured to output the drop video information and the infrared imaging video.

[0072] In a third aspect, the present application provides a self-adaptive energy-saving control system of a falling film evaporator, which adopts the following technical scheme:

[0073] A self-adaptive energy-saving control system of a falling film evaporator, which includes:

[0074] a plurality of temperature sensors arranged at a plurality of preset positions in an evaporation chamber and configured to collect temperature values of the plurality of positions;

[0075] a density sensor arranged in a separation chamber and configured to collect a density of concentrated liquid;

[0076] a camera device arranged in the separation chamber and configured to collect drop video information of a top portion of the separation chamber;

[0077] an infrared imaging device arranged in the separation chamber and configured to collect infrared imaging video of the top portion of the separation chamber;

[0078] a power sensor configured to collect a power of a compression fan;

[0079] a plurality of standby steam pipelines, which are in communication with a steam chamber and in communication with the compression fan.

[0080] The electronic device is connected in communication with the plurality of temperature sensors, the density sensor, the camera device, the infrared imaging device, and the power sensor, and is configured to acquire temperature values of a plurality of preset positions in the evaporation chamber, a density of the concentrated liquid in the separation chamber, drop video information of the top of the separation chamber, infrared imaging video of the top of the separation chamber, and power of the compression fan, determine a target steam pipeline from a plurality of standby steam pipelines based on the temperature value of a first target position, the drop video information, and the density of the first target position, determine a target power required by the compression fan based on the temperature value and the infrared imaging video of each first target position, control the compression fan to operate at the target power, and control the target steam pipeline to be opened.

[0081] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution:

[0082] A computer-readable storage medium, when the computer program is executed in the computer, causes the computer to execute the adaptive energy-saving control method of the falling film evaporator according to any one of the first aspect.

[0083] In summary, the present application has at least one of the following beneficial technical effects:

[0084] The first target position with a temperature value lower than the preset temperature threshold indicates that the evaporation effect of the material in the evaporation chamber is reduced, resulting in reduced steam formation quality and reduced concentrated liquid quality in the separation chamber. Therefore, the target steam pipeline is determined from a plurality of standby steam pipelines based on the temperature value, the drop video information, and the density of the first target position. The infrared imaging video represents the specific situation and quality of steam formation in the separation chamber. Therefore, the target power required by the compression fan is determined based on the temperature value and the infrared imaging video of the first target position, the power of the compression fan is increased, the compression fan works on the steam to increase the temperature of the steam, thereby compensating for the temperature of the first target position in the evaporation chamber. The appropriate target power is determined based on the temperature value and the infrared imaging video of the first target position, the compression fan is controlled to operate at the target power, and the target steam pipeline is controlled to be opened, thereby performing temperature compensation. If the target power is too large, the use of electric energy will increase, and if the target power is too small, the temperature compensation effect will be poor. Therefore, determining the appropriate target power can achieve the effect of energy saving while performing temperature compensation. In combination with the determined appropriate target steam pipeline, the energy loss of the steam during the temperature compensation process is reduced, thereby further achieving the effect of energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0085] Figure 1 is a flowchart of an adaptive energy-saving control method of a falling film evaporator according to an embodiment of the present application.

[0086] Figure 2 is a structural diagram of a falling film evaporator according to an embodiment of the present application.

[0087] Figure 3 is a structural diagram of an adaptive energy-saving control device of a falling film evaporator according to an embodiment of the present application.

[0088] Figure 4 is a structural diagram of an adaptive energy-saving control system of a falling film evaporator according to an embodiment of the present application.

[0089] Figure 5 is a structural diagram of an electronic device according to an embodiment of the present application.

[0090] Reference signs: 21, evaporation chamber; 22, separation chamber; 23, advanced separation chamber; 24, compression fan; 25, main steam pipeline; 251, throttle valve; 31, temperature sensor; 32, density sensor; 33, camera device; 34, infrared imaging device; 35, standby steam pipeline; 351, electronic valve; 352, flow guide plate; 36, power sensor; 37, electronic device; 371, processor; 372, bus; 372, memory; 374, transceiver; 40, adaptive energy-saving control device of a falling film evaporator; 401, first acquisition module; 402, standby pipeline determination module; 403, power determination module; 404, control module. DETAILED DESCRIPTION

[0091] The present application will be further described below in conjunction with the accompanying drawings.

[0092] Those skilled in the art can make modifications to the present embodiments without creative contribution after reading the present specification, and such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

[0093] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative contribution fall within the scope of the present application.

[0094] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0095] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0096] This application provides an adaptive energy-saving control method for a falling film evaporator, executed by an electronic device. This electronic device can be a server or a terminal device. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these. The terminal device and the server can be directly or indirectly connected via wired or wireless communication. This application does not impose any limitations on this. Figure 1 As shown, the method includes steps S101, S102, S103, and S104, wherein,

[0097] S101, acquire the temperature values ​​at multiple preset locations in the evaporation chamber, the density of the concentrate in the separation chamber, the video information of the dripping liquid at the top of the separation chamber, the infrared imaging video at the top of the separation chamber, and the power of the compressor fan.

[0098] For the embodiments of this application, such as Figure 2 As shown, multiple heat exchange tubes are vertically arranged inside the evaporation chamber 21 of the falling film evaporator. Operators can pre-install temperature sensors 31 at different heights within the evaporation chamber 21 to collect temperature values ​​at these different heights. Temperature values ​​are crucial for the effectiveness of moisture evaporation from the material. The temperature sensors 31 can be set at equal intervals or according to desired intervals. The temperature sensors 31 are connected to electronic equipment via wires or wirelessly to enable the electronic equipment to acquire temperature values.

[0099] The material flows through the heat exchange tube to the separation chamber 22. After evaporation, the density of the material changes to obtain a concentrated liquid. The density of the concentrated liquid can characterize the concentration quality of the material. Therefore, in order to know the density of the concentrated liquid, the staff can set up a density sensor 32 or a density meter or other device that can collect the density of the concentrated liquid in the separation chamber 22 in advance. The density sensor 32 is connected to the electronic equipment through wires or wirelessly, so that the electronic equipment can obtain the density of the concentrated liquid.

[0100] To better understand the separation of steam and concentrate in the material, a camera device 33 and an infrared imaging device 34 are installed in the separation chamber 22. The concentrate forms droplets from the bottom of the heat exchange tubes and falls into the separation chamber 22. Therefore, the camera device 33 captures video information from the bottom of the heat exchange tubes, i.e., video information of the droplets at the top of the separation chamber. Similarly, the infrared imaging device 34 is also installed in the separation chamber 22. This infrared imaging device 34 can capture infrared video of the steam within the separation chamber 22. The formation and separation of steam can be understood through this infrared video, facilitating subsequent analysis of the concentrate's quality and the required power of the compressor 24.

[0101] S102, if there is a first target location with a temperature value lower than a preset temperature threshold, then the target steam pipeline is determined from multiple backup steam pipelines based on the temperature value, dripping video information, and density of the first target location.

[0102] In this embodiment of the application, in order to improve the temperature control effect in the steam chamber and increase the yield of the concentrate, multiple backup steam lines are connected to the evaporation chamber of the falling film evaporator, such as... Figure 2 As shown, the material enters the heat exchange tubes in the evaporation chamber 21, then flows into the separation chamber 22 to form steam and concentrate. The steam may contain a small amount of unseparated material, so it flows into the advanced separation chamber 23 for further separation to obtain purer steam. The steam then flows to the compressor 24 to perform work and increase its temperature, before returning to the evaporation chamber 21 through the main steam pipeline 25. One end of the backup steam pipeline 35 is connected to the compressor 24, and the other end is connected to the evaporation chamber 21. When there are areas with lower temperatures in the evaporation chamber 21, high-temperature steam can be supplied to the evaporation chamber 21 using the backup steam pipeline 35 to maintain the temperature within the evaporation chamber 21 at the desired value.

[0103] Staff can set appropriate preset temperature thresholds based on factors such as the different materials, and store these thresholds in the electronic device. Since the evaporation chamber has high temperature requirements, the electronic device acquires the temperature value at each preset location and compares it with the preset temperature threshold. If a first target location has a temperature lower than the preset threshold, it indicates an anomaly in the heat exchange process; that is, insufficient temperature inside the evaporation chamber leads to insufficient temperature in the heat exchange tubes, resulting in less water evaporation and insufficient material concentration. Because the dripping video information records the specific formation and dripping of the concentrated droplets, the density of the concentrate characterizes the quality of the concentrate formation, and the temperature value characterizes the temperature inside the evaporation chamber, the target steam pipeline to be activated is determined from multiple backup steam pipelines based on the temperature value at the first target location, the dripping video information, and the density.

[0104] S103, determine the target power required by the compression fan based on the temperature value of the first target position and the infrared imaging video.

[0105] For the embodiment of the present application, the temperature value of the first target position represents the specific degree of temperature loss, and the temperature value of the first target position is related to the power required to be increased by the compression fan. And the infrared imaging video records the formation of steam in the separation chamber, and the temperature, volume and other factors of the steam are also related to the power required to be increased by the compression fan, so the electronic device can accurately determine the target power required by the compression fan by combining the temperature value of the first target position and the infrared imaging video.

[0106] S104, control the compression fan to operate according to the target power, and control the target steam pipeline to be opened.

[0107] For the embodiment of the present application, the electronic device is connected with the compression fan through wireless or wire, and after the electronic device determines the target power required by the compression fan, the electronic device sends a control signal to the compression fan to make the compression fan operate according to the target power. Similarly, an electronic valve is arranged on each standby steam pipeline to control the opening or closing of the standby steam pipeline, and the electronic device is connected with the electronic valve on each standby steam pipeline through wire or wireless, and the electronic device determines the target steam pipeline and sends a control signal to the electronic valve of the target steam pipeline to make the electronic valve of the target steam pipeline act, so as to connect the compression fan and the steam chamber. It should be understood that the increase of the power of the compression fan will cause the temperature of the steam to rise, and in turn may cause the temperature of the main steam pipeline output to rise, and the steam with the rising temperature is only used for temperature compensation of the first target position, as shown in FIG. 25, a throttle valve 251 can be arranged on the main steam pipeline to adjust the pressure and flow in the main steam pipeline, thereby preventing the temperature in the main steam pipeline from being too high, causing the density, concentration and consistency of the concentrated liquid to increase. Figure 2

[0108] By determining the appropriate target steam pipeline through the temperature value of the first target position, the drop video information and the density, and then determining the appropriate target power required by the compression fan according to the temperature value of the first target position and the infrared imaging video, the waste of more electric energy caused by the excessive target power is prevented, so the determined target power is more appropriate, and the compression fan operating according to the target power saves more electric energy.

[0109] ​In a possible implementation of the embodiment, the target steam pipeline is determined from the plurality of standby steam pipelines based on the temperature value of the first target position, the drop video information, and the density in step S102, and specifically includes steps S1021 (not shown in the figure), S1022 (not shown in the figure), S1023 (not shown in the figure), S1024 (not shown in the figure), S1025 (not shown in the figure), and S1026 (not shown in the figure), where

[0110] In S1021, a temperature difference value between the temperature value of each first target position and a preset temperature threshold is determined, and a first average value of the temperature difference values is determined.

[0111] For the embodiment, after the electronic device obtains the temperature value of each first target position, the temperature difference value between the temperature value of each first target position and the preset temperature threshold is calculated. The greater the difference value, the worse the evaporation effect of the water in the material in the heat exchange pipe. The electronic device determines the first average value of the temperature difference values by using an average value calculation formula. The first average value represents the deviation degree of the overall temperature values of all the first target positions.

[0112] In S1022, feature recognition is performed on each frame of the drop video information to obtain a first number of complete drops dripped by each heat exchange pipe in each frame and a second number of complete drops in each frame.

[0113] For the embodiment, the electronic device inputs the drop video information into the trained network model for feature recognition, so as to identify the first number of complete drops dripped by each heat exchange pipe in each frame, and sum the first number of complete drops dripped by each heat exchange pipe in each frame to obtain the second number of complete drops in each frame. The trained network model can be a convolutional neural network model, a recurrent neural network model, or other types of network models, which are not limited herein. The staff can collect images of normal drops at the top of the separation chamber in advance, and label the complete drops in the images to obtain a training sample set. The electronic device trains the network model according to the training sample set to obtain the trained network model. In other implementations, edge detection can be performed on each frame, and each frame can be preprocessed, such as denoising, and then grayscale transformation is performed to obtain the edge contour of the complete drops, and then the complete drops are identified.

[0114] The first quantity represents the number of complete droplets dropped by a single heat exchange tube in a unit of time, and the first quantity of the single heat exchange tube in normal concentration is within a reasonable range. The second quantity represents the number of complete droplets dropped by all heat exchange tubes in a unit of time, and the second quantity of all heat exchange tubes in normal concentration is also within a reasonable range. The more the first quantity and the second quantity, the less the water evaporation, and the steam temperature in the falling film evaporator is reduced to cause the droplets in the separation chamber to become fast. In the falling film evaporator, the material is heated and evaporated, and the generated steam and the unevaporated liquid enter the separation chamber for separation. When the steam temperature is reduced, the heating capacity of the steam to the material liquid is weakened, which reduces the evaporation speed of the material liquid, thereby affecting the efficiency of the entire evaporation process. Due to the reduction of the steam temperature, the evaporation amount of the material liquid on the tube wall is reduced, so that more liquid flows down in the form of droplets into the separation chamber and is quickly discharged.

[0115] S1023, determine the droplet frequency of all heat exchange tubes based on the first quantity, and calculate the second average value of the second quantity.

[0116] For the embodiment of the present application, the electronic device determines the droplet frequency of each heat exchange tube based on the sum of the first quantity of each heat exchange tube in a preset time period and a unit of time, and determines the droplet frequency of all heat exchange tubes based on the droplet frequency of each heat exchange tube, the number of all heat exchange tubes, and the average value calculation formula. The electronic device determines the second average value based on the second quantity in each frame of picture and the number of each frame of picture.

[0117] S1024, determine the required number of standby steam pipelines based on the first average value, the droplet frequency, and the second average value.

[0118] For the embodiments of the present application, the first average value represents the temperature deviation degree of the whole first target position, the greater the first average value, the more serious the temperature deviation, the more the number of standby steam pipes required, similarly, the greater the drop frequency, the more insufficient the evaporation of material moisture, that is, the insufficient heat absorption of moisture in the material, the more the number of standby steam pipes required, the greater the second average value, the more complete droplets formed at the top of the separation chamber in each frame of picture, which also indicates that the evaporation of material moisture is more insufficient, and the more the number of standby steam pipes required, therefore, the above three are important factors affecting the number of standby steam pipes used, and the influence degree is not the same, different coefficients can be set for the above three, assuming that the coefficient of the first average value is 0.4, the coefficient of the drop frequency is 0.4, and the coefficient of the second average value is 0.2, assuming that the first average value is 3, the drop frequency is 15, and the second average value is 9, the electronic device performs weighted calculation based on the coefficients and the values of the above three factors to obtain 3*0.4+15*0.4+9*0.2=9, and the determined value 9 can be used as a score, which is related to the number of standby steam pipes required, and the electronic device can pre-store a plurality of preset value intervals, each preset value interval corresponds to a suitable number of standby steam pipes required, the electronic device determines the preset value interval where the value 9 is located, and determines the number corresponding to the interval as the number of standby steam pipes required.

[0119] In S1025, if the required number is less than the number of first target positions, the distance from each standby steam pipe to each first target position is calculated, and the average distance corresponding to each standby steam pipe is calculated based on the distance.

[0120] For the embodiments of the present application, if the determined required number is less than the number of first target positions, it indicates that fewer standby steam pipes are required to cover all first target positions, so it is necessary to determine the suitable position of the standby steam pipe. The worker draws the evaporator in the preset grid chart and marks the coordinates of each preset position and the coordinates of each standby steam pipe, calculates the distance from each standby steam pipe to each first target position by the distance formula between two points, and determines the average distance of each standby steam pipe according to the average value calculation formula. If the required number is not less than the number of first target positions, it indicates that one target steam pipe can at least compensate for the temperature of one first target position, so the nearest standby steam pipe to each first target position is directly determined as the target steam pipe.

[0121] In S1026, the first required number of standby steam pipes with the smallest average distance are determined as target steam pipes.

[0122] For the embodiments of the present application, the smaller the average distance of a certain standby steam pipeline is, the smaller the distance from the standby steam pipeline to each first target position is, and the standby steam pipeline is suitable to be used as the target steam pipeline. Therefore, the electronic device sorts the average distances from small to large, and selects the required number of standby steam pipelines, i.e., the target steam pipelines, according to the sorting result. Assuming that the required number is 2 and there are three standby steam pipelines, the electronic device sorts the three standby steam pipelines from small to large according to the average distances, and selects the first two standby steam pipelines as the target steam pipelines. After determining the appropriate number of standby steam pipelines, the final target steam pipeline is determined according to the average distance corresponding to each standby steam pipeline, thereby improving the effect of steam delivery of the steam chamber and enabling each first target position to be quickly heated.

[0123] In one possible implementation of the embodiments of the present application, the step S103 of determining the target power required by the compression fan based on the temperature value of each first target position and the infrared imaging video specifically includes steps S1031 (not shown in the figure), S1032 (not shown in the figure), S1033 (not shown in the figure), S1034 (not shown in the figure), S1035 (not shown in the figure), and S1036 (not shown in the figure), wherein,

[0124] S1031, determining the steam volume and the average steam temperature of the overall steam ejected by the heat exchange pipe based on the infrared imaging video.

[0125] For the embodiments of the present application, the electronic device can first filter out the liquid droplet features in the infrared imaging video, thereby reducing the influence of the liquid droplet features on the subsequent analysis of the infrared imaging video. The electronic device performs edge detection on each frame of the infrared imaging video to obtain the edge profile of the steam ejected by the overall heat exchanger, and characterizes the pixel number in the profile as the steam volume. The more the pixel number is, the larger the steam volume is. The electronic device determines the average value of the pixel number according to the pixel number of each frame and the number of all frames of the infrared imaging video, i.e., the average value of the pixel number characterizes the steam volume.

[0126] Since the infrared imaging video also records the temperature in the steam, the temperatures at the edge and the center of the steam can be different. Therefore, the electronic device determines the average temperature of the steam in each frame according to the temperature values of different positions of the steam in each frame, i.e., the average temperature is used to characterize the temperature of the steam in each frame. The electronic device determines the average steam temperature by using the number of all frames and the temperature of the steam in each frame in combination with the average value calculation formula, and uses the average steam temperature to characterize the steam temperature. Both the steam volume and the steam temperature can characterize the formation and quality of the steam in the separation chamber.

[0127] S1032, calculate a first similarity between each two adjacent frames of the infrared imaging video, and a second similarity between each frame and a preset frame.

[0128] For the embodiments of the present application, the electronic device calculates the first similarity between each two adjacent frames, and the smaller the first similarity, the greater the change in steam in the two adjacent frames, the more intense the steam generation, the more sufficient the steam formation, i.e., the more sufficient the concentration, and the greater the first similarity, the smaller the change in steam in the two adjacent frames, the more gentle the steam change, the less steam formation. The electronic device calculates the second similarity between each frame and a preset frame, and the preset frame is an infrared frame of the steam formed in the separation chamber when the water in the material evaporates normally in the evaporator collected by the staff in advance. The electronic device calculates the second similarity between each frame and the preset frame, and the second similarity represents the difference between the current formed steam and the standard steam, and the greater the second similarity, the smaller the difference between the current steam formation and the standard steam formation, and the smaller the second similarity, the greater the difference between the current steam formation and the standard steam formation. The similarity can be calculated by structural similarity measurement (SSIM). It can also be calculated by cosine similarity.

[0129] S1033, determine the variance of the first similarity and the similarity average of the second similarity.

[0130] For the embodiments of the present application, the electronic device first calculates the average of the first similarity, and then calculates the variance of the first similarity using the variance calculation formula, which represents the intensity of the steam change in the separation chamber. The electronic device calculates the similarity average of the second similarity, which represents the overall difference between the steam formed in the current separation chamber and the standard steam.

[0131] S1034, determine a first score based on the variance, the similarity average, the steam volume, and the steam average temperature.

[0132] For the embodiments of the present application, the variance and the similarity average are both key factors affecting the quality of the current formed steam, and the degree of influence is different, the greater the variance, the more intense the steam formation, the more sufficient the steam formation, the greater the similarity average, the closer the formed steam to the standard steam, the greater the steam volume, the more sufficient the steam formation, and the higher the steam average temperature, the more sufficient the steam formation. The staff can set different coefficients for the variance, the similarity average, the steam volume, and the steam average temperature and perform weighted calculation according to the size of the variance, the similarity average, the steam volume, and the steam average temperature to obtain a first score about the quality of the current formed steam. The greater the first score, the higher the steam quality, the less power the compression fan needs to increase, and the more power the compression fan saves. The way of weighted calculation can refer to the content disclosed in step S1024.

[0133] S1035, determine a temperature difference value between the temperature value of each first target position and the preset temperature threshold, and determine a second score based on the temperature difference value and the number of first target positions.

[0134] For the embodiments of the present application, the greater the temperature difference value, the less sufficient the steam formation in the heat exchange pipe, the lower the density of the concentrated liquid, and the greater the power required by the compression fan. The greater the number of first target positions, the lower the overall steam temperature in the evaporation chamber, the less sufficient and lower the temperature of the formed steam, and the greater the power required by the compression fan. Therefore, different coefficients are set for the temperature difference value and the number of first target positions, and a second score about the temperature in the evaporation chamber is obtained by weighted calculation. The manner of weighted calculation can refer to the content disclosed in steps S1024 or S1034.

[0135] S1036, determine the target power required by the compression fan based on the first score and the second score.

[0136] For the embodiments of the present application, the first score represents the quality of the formed steam in the separation chamber, and the second score represents the quality of the temperature in the evaporation chamber. The target power required by the compression fan is more accurately determined by comprehensive calculation according to the first score and the second score. Specifically, the electronic device can perform weighted calculation on the first score and the second score to obtain a total score, or directly calculate the sum of the first score and the second score to obtain the total score. The electronic device can store a plurality of preset score intervals, each preset score interval corresponding to a power required by the compression fan. Therefore, the electronic device can determine the preset score interval in which the total score is located, and determine the power corresponding to the interval as the target power. Alternatively, a model can be constructed in advance according to the first score, the second score and other related parameters (such as the parameters used in the calculation of the first score and the second score mentioned above), and a training sample set about the first score, the second score and the target power can be collected in advance. The network model is trained to obtain a trained network model. The electronic device can input the first score and the second score into the trained network model to calculate the power, thereby obtaining the target power. By calculating the first score representing the quality of the steam and the second score representing the quality of the temperature in the evaporation chamber, and combining the first score and the second score to determine the target power, the determination of the target power is more accurate.

[0137] In other embodiments, the target power can also be calculated in combination with the drop frequency, which will not be described here. It should be noted that the coefficients mentioned above can be adjusted adaptively according to actual conditions and needs.

[0138] In one possible implementation of the embodiments of the present application, after step S103, the process further includes steps S105 (not shown in the figure), S106 (not shown in the figure) and S107 (not shown in the figure), wherein,

[0139] S105, acquire the drop frequency, and calculate the ratio of the first score to the drop frequency.

[0140] For the embodiment of the present application, after the electronic device determines the drop frequency, the ratio of the first score to the drop frequency is calculated. The first score represents the quality of the steam formed in the separation chamber, and the drop frequency represents the speed at which the material forms concentrated liquid after passing through the evaporation chamber. The quality of the concentrated liquid can be represented by the drop frequency. It is necessary to know that the drop frequency is calculated under the condition that the flow rate of the material into the evaporation chamber is constant. The material finally forms secondary utilization steam and concentrated liquid in the separation chamber. Therefore, under the condition that the quality of the concentrated liquid is qualified and the quality of the formed steam is qualified, the ratio of the first score to the drop frequency should be a fixed value or a fixed range. Therefore, the electronic device calculates the ratio of the first score to the drop frequency in real time to analyze the specific situation and quality of the evaporation process.

[0141] S106, determine the correspondence between the ratio and the current power of the compression fan.

[0142] For the embodiment of the present application, the current power of the compression fan affects the steam temperature and in turn affects the quality of the steam formed in the separation chamber and the quality of the concentrated liquid. Therefore, the electronic device determines the correspondence between the ratio and the current power, thereby facilitating subsequent analysis.

[0143] S107, generate a training sample set based on the correspondence to train the target network model.

[0144] The target network model is constructed based on the ratio of the first score to the drop frequency and the current power of the compression fan.

[0145] For the embodiment of the present application, in order to optimize the power adjustment of the compression fan and achieve a more energy-saving effect, the staff can construct a target network model based on the ratio of the first score to the drop frequency and the current power of the compression fan. After the electronic device determines the correspondence between the ratio and the current power, the correspondence is generated into a training sample set, thereby deeply training and optimizing the current target network model. The trained network model can adjust the power of the compression fan according to the ratio of the first score to the drop frequency, thereby achieving a more energy-saving effect.

[0146] In one possible implementation of the embodiment of the present application, each standby steam pipeline is provided with a flow guide plate capable of rotating near one end of the evaporation chamber. After step S104, steps one, two, three, four, and five are further included, wherein,

[0147] Step one, if the required number is less than the number of the first target positions, determine the angle between each first target position and the associated target steam pipeline.

[0148] Among them, the associated target steam pipeline is the angle of the nearest target steam pipeline corresponding to each first target location.

[0149] In the embodiments of this application, the guide vane can be louvered or other types of guide vanes. The angle of the guide vane can be adjusted, specifically by connecting a servo motor to the guide vane. Under normal circumstances, the delivery direction of the backup steam pipeline is perpendicular to the heat exchange tube, and the steam flows out of the backup steam pipeline in a fan shape.

[0150] If the required quantity is less than the number of first target locations, some first target locations may be too far from the associated target steam pipeline, resulting in some of the first target locations being outside the fan-shaped area covered by the steam of the associated target steam pipeline. Therefore, the electronic equipment determines the angle between each first target location and the associated target steam pipeline. Specifically, the operator draws the evaporator on a preset grid and marks the coordinates of each preset location and each spare steam pipeline. The angle between each first target location and the associated target steam pipeline is calculated using vector angle calculation formulas, etc.

[0151] Step 2: If there is a second target position with an angle greater than a preset angle threshold in the first target position, then determine the rotation angle of the guide plate on the associated target steam pipeline corresponding to the second target position based on the angle.

[0152] In this embodiment of the application, the preset angle threshold is the angle of the fan-shaped range from which steam flows out of each backup steam pipeline. The electronic device compares the determined angle with the preset angle threshold to determine whether there is a second target position with an angle greater than the preset angle threshold. The second target position is a preset position that is not easily covered by the associated target steam pipeline. Therefore, the electronic device subtracts the preset angle threshold from the angle formed by the second target position and the associated target steam pipeline to obtain an angle difference, which is the rotation angle of the guide plate on the associated target steam pipeline.

[0153] Step 3: Determine the first target location covered by the associated target steam pipeline corresponding to the second target location.

[0154] In the embodiments of this application, the electronic device determines the first target position within the fan-shaped range of the steam ejected from the associated target steam pipeline. Since the associated target steam pipeline needs to take into account other first target positions, the electronic device simulates the coverage range of the associated target steam pipeline after determining the preset angle range, and translates the coverage range to the heat exchange tube in the evaporation chamber, thereby determining the first target position to be covered.

[0155] Step 4: Determine the ratio of the temperature difference between the first target location and the temperature difference between the second target location.

[0156] For the embodiment of the present application, the greater the temperature difference of a certain first target position, the more important the first target position is. Therefore, the electronic device determines the ratio between the temperature difference of the first target position and the temperature difference of the second target position, and the ratio represents the importance priority between the first target position and the second target position.

[0157] Step five, determining the duration of the guide plate of the associated target steam pipeline after the rotation angle based on the ratio.

[0158] For the embodiment of the present application, after the electronic device determines the ratio, the duration of the guide plate after the rotation angle can be determined according to the ratio. The greater the proportion of the second target position, the more important the second target position is, and the longer the duration is. Conversely, the shorter the duration is. Therefore, the electronic device can set different durations according to different ratios. After the duration is determined, the corresponding duration can be found, and the guide plate is controlled to maintain the angle for the duration after the rotation angle, and return to the original position after the duration ends. By determining the rotation angle of the guide plate and the duration after the rotation, each first target position can be fully compensated for temperature.

[0159] In one possible implementation of the embodiment of the present application, step S106 further includes step S107 (not shown in the figure) and step S108 (not shown in the figure), wherein,

[0160] S107, mapping the corresponding relationship in the preset coordinate system, and outputting the mapped preset coordinate system.

[0161] For the embodiment of the present application, the electronic device has stored a coordinate system about the ratio and the current power in advance. After the electronic device determines the corresponding relationship, the mapping is directly performed on the coordinate system, and the adjacent corresponding relationships are connected to obtain the change condition. The electronic device outputs and displays the mapped preset coordinate system through the display screen and other display devices, so that the worker can clearly know the change condition.

[0162] S108, outputting the drop video information and the infrared imaging video.

[0163] For the embodiment of the present application, the electronic device outputs and displays the acquired infrared imaging video through the display screen, so that the worker can clearly know the formation condition of the steam in the separation chamber.

[0164] The above embodiment introduces a self-adaptive energy-saving control method of falling film evaporator from the perspective of method flow. The following embodiment introduces a self-adaptive energy-saving control device of falling film evaporator from the perspective of virtual module or virtual unit. For details, see the following embodiment.

[0165] The embodiment of the present application provides a falling film evaporator adaptive energy-saving control device 40, as shown in the figure, the falling film evaporator adaptive energy-saving control device 40 specifically can include: Figure 3

[0166] The first acquisition module 401 is used for acquiring temperature values of a plurality of preset positions in the evaporation chamber, the density of the concentrated liquid in the separation chamber, the drop video information of the top of the separation chamber, the infrared imaging video of the top of the separation chamber and the power of the compression fan;

[0167] The standby pipeline determination module 402 is used for determining a target steam pipeline from a plurality of standby steam pipelines based on the temperature value, the drop video information and the density of the first target position when the first target position with a temperature value lower than a preset temperature threshold exists;

[0168] The power determination module 403 is used for determining a target power required by the compression fan based on the temperature value and the infrared imaging video of each first target position;

[0169] The control module 404 is used for controlling the compression fan to operate at the target power and controlling the target steam pipeline to be opened.

[0170] ​The embodiment of the application discloses a kind of falling film evaporator self-adapting energy-saving control device 40, wherein, first acquisition module 401 obtains the temperature value of multiple preset positions in evaporation chamber, the density of concentrated liquid in separation chamber, the video information of droplet in the top of separation chamber, the infrared imaging video in the top of separation chamber and the power of compressor fan, there is the first target position of temperature value below preset temperature threshold, it is explained that the moisture evaporation effect of material in evaporation chamber reduces, leading to the steam formation quality in separation chamber reduces and concentrated liquid quality reduces, so backup pipeline determination module 402 is determined according to the temperature value of first target position, droplet video information and density, to determine target steam pipeline from multiple backup steam pipelines, infrared imaging video represents the specific situation and quality of steam formation in separation chamber, so power determination module 403 is determined according to the temperature value size of first target position and infrared imaging video Comprehensive judgment reaches the target power required by compressor fan, improve the power of compressor fan, and the compressor fan works on steam to improve the temperature of steam, so as to compensate the temperature of first target position in evaporation chamber, the target power of suitable size can be determined by the temperature value of first target position and infrared imaging video Comprehensive, control module 404 controls compressor fan to run according to target power, and control target steam pipeline opens, so as to carry out temperature compensation, target power is too large to cause the increase of electric energy use, and target power is too small to cause poor temperature compensation effect, so that suitable target power can achieve the effect of energy saving while carrying out temperature compensation, in combination with the suitable target steam pipeline determined, reduce the loss of steam energy in temperature compensation process, so as to further play the effect of energy saving.

[0171] In one possible implementation of the embodiment of the application, the backup pipeline determination module 402 determines the target steam pipeline from the multiple backup steam pipelines based on the temperature value of the first target position, the droplet video information and the density, and is specifically used for:

[0172] determining the temperature difference value of the temperature value of each first target position and the preset temperature threshold, and determining the first average value of the temperature difference value;

[0173] feature recognition is carried out on each frame of picture of droplet video information, to obtain the first number of complete droplet dropped by each heat exchange pipe in each frame of picture, and the second number of complete droplet in each frame of picture;

[0174] determine the droplet frequency of all heat exchange pipes based on the first number, and calculate the second average value of the second number;

[0175] determine the required number of required backup steam pipelines based on the first average value, the droplet frequency and the second average value;

[0176] If the required number is less than the number of the first target positions, distances from each standby steam pipeline to each first target position are calculated, and average distances corresponding to each standby steam pipeline are calculated based on the distances;

[0177] The first required number of standby steam pipelines with the smallest average distances are determined as target steam pipelines.

[0178] In a possible implementation of the embodiment, the power determination module 403 is specifically configured to:

[0179] The steam volume and the average steam temperature of the heat exchange pipe are determined based on the infrared imaging video;

[0180] The first similarity between each two adjacent frames of the infrared imaging video and the second similarity between each frame and a preset frame are calculated;

[0181] The variance of the first similarity and the average value of the second similarity are determined;

[0182] The first score is determined based on the variance, the average value, the steam volume, and the average steam temperature;

[0183] The temperature difference between the temperature value of each first target position and a preset temperature threshold is determined, and the second score is determined based on the temperature difference and the number of the first target positions;

[0184] The target power required by the compression fan is determined based on the first score and the second score.

[0185] In a possible implementation of the embodiment, the device 40 further includes:

[0186] The second acquisition module is configured to acquire the drop frequency and calculate a ratio of the first score to the drop frequency;

[0187] The corresponding relationship determination module is configured to determine a corresponding relationship between the ratio and the current power of the compression fan;

[0188] The generation module is configured to generate a training sample set based on the corresponding relationship, so as to train a target network model, the target network model being constructed based on the ratio of the first score to the drop frequency and the current power of the compression fan.

[0189] In a possible implementation of the embodiment, each standby steam pipeline is provided with a guide vane capable of rotating at one end close to the evaporation chamber, and the device 40 further includes:

[0190] The angle determination module is configured to determine an angle formed by each first target position and an associated target steam pipeline, when the required number is less than the number of the first target positions, the associated target steam pipeline being the target steam pipeline closest to each first target position;

[0191] The rotation angle determination module is configured to determine a rotation angle of a guide vane on the associated target steam pipeline corresponding to the second target position, when the second target position with the angle greater than the preset angle threshold exists in the first target positions;

[0192] The position determination module is configured to determine first target positions covered by the associated target steam pipeline corresponding to the second target position;

[0193] The proportion determination module is configured to determine a proportion of a temperature difference value of the covered first target positions and a temperature difference value of the second target position;

[0194] The duration determination module is configured to determine a duration of the guide vane on the associated target steam pipeline after the rotation angle, based on the proportion.

[0195] In one possible implementation of the embodiment of the present application, the device 40 further includes:

[0196] The first output module is configured to map the corresponding relationship in a preset coordinate system, and output the mapped preset coordinate system.

[0197] The second output module is configured to output the drop video information and the infrared imaging video.

[0198] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the self-adaptive energy-saving control device 40 of the falling film evaporator described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0199] In the embodiment of the present application, a self-adaptive energy-saving control system of a falling film evaporator is provided, which includes: Figure 2 and Figure 4As shown, the device includes a plurality of temperature sensors 31 arranged at a plurality of preset positions in the evaporation chamber 21 for collecting temperature values at the plurality of positions. A density sensor 32 arranged in the separation chamber 22 for collecting density of the concentrated liquid. A camera device 33 arranged in the separation chamber 22 for collecting video information of the drips on the top of the separation chamber 22. An infrared imaging device 34 arranged in the separation chamber 22 for collecting infrared imaging video on the top of the separation chamber 22. A power sensor 36 for collecting power of the compressed air blower. A plurality of standby steam pipelines 35, the plurality of standby steam pipelines are in communication with the evaporation chamber 21 and the compressed air blower 24, and an electronic valve 351 is arranged in each standby steam pipeline 35, the electronic valve 351 is connected to the electronic device 37 through wired or wireless connection, so that the electronic device 37 controls the electronic valve 351 to act, thereby controlling the standby steam pipeline 351 to open. The electronic device 37 is connected to the plurality of temperature sensors 31 through wired or wireless connection, connected to the density sensor 32 through wired or wireless connection, connected to the camera device 33 through wired or wireless connection, connected to the infrared imaging device 34 through wired or wireless connection, and connected to the power sensor 36 through wired or wireless connection, for obtaining temperature values at a plurality of preset positions in the evaporation chamber 21, density of the concentrated liquid in the separation chamber 22, video information of the drips on the top of the separation chamber 22, infrared imaging video on the top of the separation chamber 22, and power of the compressed air blower 24, if there is a first target position with a temperature value lower than a preset temperature threshold, determining a target steam pipeline from the plurality of standby steam pipelines 35 based on the temperature value, the video information of the drips and the density of the first target position, determining a target power required by the compressed air blower 24 based on the temperature value of each first target position and the infrared imaging video, controlling the compressed air blower 24 to operate at the target power, and controlling the target steam pipeline to open. And the electronic device 37 is used to execute the content disclosed in the above method embodiment.

[0200] The temperature values of the plurality of preset positions collected by the temperature sensor 31 are sent to the electronic device 37 so that the electronic device 37 acquires, the density of the concentrated liquid collected by the density sensor 32 is sent to the electronic device 37, the video information of the drop collected by the camera device 33 is sent to the electronic device 37, the infrared imaging video collected by the infrared imaging device 34 is sent to the electronic device 37, the power of the compressed fan 24 collected by the power sensor 36 is sent to the electronic device 37, and the electronic device 37 can determine the target steam pipeline and the target power of the compressed fan 24 according to the above data and the content disclosed in the above method embodiments. In addition, each standby steam pipeline 35 is provided with a flow guide plate 352, the electronic device 37 is connected with a servo motor for rotating the flow guide plate 352 through wires or wireless, so as to control the rotation of the flow guide plate 352. In order to control the steam flow rate and pressure in the main steam pipeline 25, a throttle valve 251 is arranged on the main steam pipeline 25, and the electronic device 37 is connected with the throttle valve 251 through wires or wireless.

[0201] An electronic device is provided in the embodiments of the present application, as shown in Figure 5 Figure 5 The electronic device 37 shown in the embodiments of the present application includes a processor 371 and a memory 373. The processor 371 and the memory 373 are connected, for example, through a bus 372. Optionally, the electronic device 37 can further include a transceiver 374. It should be noted that the transceiver 374 is not limited to one in actual application, and the structure of the electronic device 37 does not constitute a limitation on the embodiments of the present application.

[0202] The processor 371 can be a CPU (Central Processing Unit, central processor), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can realize or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure. The processor 371 can also be a combination of computing functions, such as one or more microprocessor combinations, combinations of DSP and microprocessor, etc.

[0203] ​The bus 372 can include a path that transmits information between the above-described components. The bus 372 can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 372 can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 5 Only one thick line is used to represent the bus in the middle, but it does not mean that there is only one bus or one type of bus.

[0204] The memory 373 can be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0205] The memory 373 is used to store application program codes for implementing the scheme of the present application, and is controlled to execute by the processor 371. The processor 371 is used to execute the application program codes stored in the memory 373 to realize the content shown in the foregoing method embodiments.

[0206] The electronic device includes, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet Personal Computer), a PMP (Portable Multimedia Player), a car terminal (for example, a car navigation terminal), etc., and a fixed terminal such as a digital TV, a desktop computer, etc. It can also be a server, etc. Figure 5 The electronic device shown is only an example, and should not bring any limitation to the function and use range of the embodiments of the present application.

[0207] The computer readable storage medium provided in the embodiment of the present application stores a computer program, and when the computer program runs on a computer, the computer can execute the corresponding content in the foregoing method embodiment. Compared with the related art, the first target position with a temperature value lower than the preset temperature threshold in the embodiment of the present application indicates that the moisture evaporation effect of the material in the evaporation chamber is reduced, which leads to the reduction of the steam formation quality in the separation chamber and the reduction of the concentrated liquid quality. Therefore, the target steam pipeline is determined from the multiple standby steam pipelines according to the temperature value of the first target position, the drop video information, and the density. The infrared imaging video represents the specific situation and quality of the steam formation in the separation chamber. Therefore, the target power required by the compression fan is determined according to the temperature value of the first target position and the infrared imaging video, the power of the compression fan is improved, the compression fan works on the steam to improve the temperature of the steam, thereby compensating for the temperature of the first target position in the evaporation chamber. The target power of appropriate size is determined by the temperature value of the first target position and the infrared imaging video, the compression fan is controlled to operate according to the target power, and the target steam pipeline is controlled to be opened, thereby performing temperature compensation. The target power is too large, which leads to an increase in the use of electric energy, and the target power is too small, which leads to poor temperature compensation effect. Therefore, the determination of the appropriate target power can achieve the effect of energy saving while performing temperature compensation. In combination with the determination of the appropriate target steam pipeline, the energy loss of the steam in the temperature compensation process is reduced, thereby further achieving the effect of energy saving.

[0208] It should be understood that although each step in the flowchart of the accompanying drawings is displayed in sequence according to the indication of the arrow, these steps are not necessarily executed in sequence according to the indication of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or sub-steps or stages of other steps.

[0209] The above only describes some embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, some improvements and refinements can be made, which should also be regarded as the protection scope of the present application.

Claims

1. An adaptive energy-saving control method for a falling film evaporator, characterized in that, include: The system acquires temperature values ​​at multiple preset locations in the evaporation chamber, density of the concentrate in the separation chamber, video information of dripping liquid at the top of the separation chamber, infrared imaging video of the top of the separation chamber, and power of the compressor fan. If there is a first target location with a temperature value lower than a preset temperature threshold, then the target steam pipeline is determined from multiple backup steam pipelines based on the temperature value, dripping video information, and density of the first target location. The target power required by the compressor is determined based on the temperature value at each first target location and the infrared imaging video. Control the compressor to operate at the target power, and control the target steam pipeline to open; The step of determining the target steam pipeline from multiple backup steam pipelines based on the temperature value, dripping video information, and density at the first target location includes: Determine the temperature difference between the temperature value at each first target location and a preset temperature threshold, and determine the first average value of the temperature difference; Feature recognition is performed on each frame of the dripping video information to obtain the first number of complete droplets dripping from each heat exchange tube in each frame, and the second number of complete droplets in each frame. Based on the first quantity, determine the overall dripping frequency of all heat exchange tubes, and calculate the second average value of the second quantity; The required number of backup steam lines is determined based on the first average value, the dripping frequency, and the second average value. If the required quantity is less than the quantity at the first target location, then calculate the distance from each backup steam pipeline to each first target location, and calculate the average distance corresponding to each backup steam pipeline based on the distance. The target steam pipeline is determined by the number of spare steam pipelines with the minimum average distance mentioned above.

2. The adaptive energy-saving control method for a falling film evaporator according to claim 1, characterized in that, The determination of the target power required by the compressor based on the temperature value and infrared imaging video at each first target location includes: The overall steam volume and average steam temperature ejected from the heat exchanger tube are determined based on the infrared imaging video. Calculate the first similarity between every two adjacent frames of the infrared imaging video, and the second similarity between each frame and a preset frame; Determine the variance of the first similarity and the average similarity of the second similarity; The first score is determined based on the variance, the average similarity, the steam volume, and the average steam temperature. Determine the temperature difference between the temperature value at each first target location and a preset temperature threshold, and determine a second score based on the temperature difference and the number of first target locations; The target power that the compressor needs to achieve is determined based on the first score and the second score.

3. The adaptive energy-saving control method for a falling film evaporator according to claim 2, characterized in that, The method further includes: Obtain the dripping frequency and calculate the ratio of the first score to the dripping frequency; Determine the correspondence between the ratio and the current power of the compressor; A training sample set is generated based on the correspondence to train the target network model, which is constructed based on the ratio of the first score to the dripping frequency and the current power of the compressor.

4. The adaptive energy-saving control method for a falling film evaporator according to claim 1, characterized in that, Each standby steam line is equipped with a rotating baffle plate at the end near the evaporation chamber to control the opening of the target steam line, and also includes: If the required quantity is less than the quantity of the first target locations, then the angle between each first target location and the associated target steam pipeline is determined, wherein the associated target steam pipeline is the angle between the nearest target steam pipeline corresponding to each first target location; If there is a second target position with an angle greater than a preset angle threshold among the first target positions, then the rotation angle of the guide plate on the associated target steam pipeline corresponding to the second target position is determined based on the angle. Determine the first target location covered by the associated target steam pipeline corresponding to the second target location; Determine the ratio of the temperature difference between the first target location and the temperature difference between the second target location; The duration of the guide vane of the associated target steam pipeline after the rotation angle is determined based on the ratio.

5. The adaptive energy-saving control method for a falling film evaporator according to claim 3, characterized in that, The method further includes: The correspondence is mapped onto a preset coordinate system, and the mapped preset coordinate system is output. Output the droplet video information and infrared imaging video.

6. An adaptive energy-saving control device for a falling film evaporator, characterized in that, include: The first acquisition module is used to acquire the temperature values ​​at multiple preset locations in the evaporation chamber, the density of the concentrate in the separation chamber, the video information of the dripping liquid at the top of the separation chamber, the infrared imaging video at the top of the separation chamber, and the power of the compressor fan. The backup pipeline determination module is used to determine the target steam pipeline from multiple backup steam pipelines when there is a first target location with a temperature value lower than a preset temperature threshold, based on the temperature value of the first target location, dripping video information, and density. A power determination module is used to determine the target power that the compressor needs to achieve based on the temperature value at each first target location and the infrared imaging video. The control module is used to control the compressor to operate at the target power and to control the opening of the target steam pipeline.

7. An adaptive energy-saving control system for a falling film evaporator, characterized in that, include: Multiple temperature sensors are installed at multiple preset locations within the evaporation chamber to collect temperature values ​​at these locations. A density sensor, installed in the separation chamber, is used to collect the density of the concentrate; A camera device is installed inside the separation chamber to collect video information of the droplets at the top of the separation chamber; An infrared imaging device is installed inside the separation chamber to collect infrared imaging video from the top of the separation chamber. A power sensor is used to collect the power of the compressor. Multiple backup steam pipelines are connected to the steam chamber and to the compressed air fan; An electronic device, communicatively connected to the multiple temperature sensors, the density sensor, the camera device, the infrared imaging device, and the power sensor, is used to acquire temperature values ​​at multiple preset locations in the evaporation chamber, density of the concentrate in the separation chamber, video information of dripping liquid at the top of the separation chamber, infrared imaging video at the top of the separation chamber, and power of the compressor. If there is a first target location with a temperature value lower than a preset temperature threshold, a target steam pipeline is determined from multiple backup steam pipelines based on the temperature value, dripping liquid video information, and density of the first target location. The target power required by the compressor is determined based on the temperature value and infrared imaging video of each first target location. The compressor is controlled to operate at the target power, and the target steam pipeline is controlled to open.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed in the computer, the computer is instructed to execute the adaptive energy-saving control method for a falling film evaporator as described in any one of claims 1 to 5.

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