Air inlet control method and system for cold spraying tower

Abstract

The invention relates to the technical field of air inlet control, and discloses an air inlet control method and system for a cold spraying tower, the system comprises a first air inlet module, a second air inlet module, the cold spraying tower, an air inlet and a control module, the first air inlet module and the second air inlet module are in axial symmetry about the center of the cold spraying tower, and the air inlet is formed in the top of the cold spraying tower; the control module is used for controlling the first air inlet module and the second air inlet module, the first air outlet temperature sensor is connected with the first bag-type dust collector, the first bag-type dust collector is connected with the first centrifugal fan, the first centrifugal fan is communicated with the first pneumatic butterfly valve and the second pneumatic butterfly valve, and the first heat exchanger is communicated with the second pneumatic butterfly valve. The third pneumatic butterfly valve communicates with the first heat exchanger, communicates with the top of the air inlet, is provided with a first air inlet temperature sensor and is connected with the first primary filter. Natural resources are effectively utilized for cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of air intake control, and in particular, to a method and system for controlling the air intake of a spray cooling tower. Background Art

[0002] In the modern industrial production system, as a heat exchange device, the spray cooling tower is widely used in multiple fields such as chemical industry, electric power, and metallurgy. Its operating efficiency and energy consumption performance directly affect production stability.

[0003] At present, the spray cooling tower adopts a single circulating air intake mode, which lacks flexibility during the whole-year operation. Especially in winter, the spray cooling tower can only maintain the circulating air intake state. Under this working condition, after the circulating air in the spray cooling tower undergoes heat exchange, the output air temperature is still relatively high. To ensure the normal operation of production, it is necessary to start refrigeration equipment such as chillers to cool the hot air, which not only increases production energy consumption but also cannot utilize natural resources to cool the hot air.

[0004] Therefore, it is necessary to design a method and system for controlling the air intake of a spray cooling tower to solve the problems existing in the current technology. Summary of the Invention

[0005] In view of this, the present invention proposes a method and system for controlling the air intake of a spray cooling tower, aiming to solve the problem that in winter, the spray cooling tower needs to start refrigeration equipment such as chillers to cool the hot air, which not only increases production energy consumption but also cannot utilize natural resources to cool the hot air.

[0006] On the one hand, the present invention proposes a system for controlling the air intake of a spray cooling tower, including:

[0007] A first air intake module, a second air intake module, a spray cooling tower, an air inlet, and a control module;

[0008] The first air intake module is axisymmetric with respect to the spray cooling tower, and the second air intake module is axisymmetric with respect to the spray cooling tower;

[0009] The air inlet is arranged at the top of the spray cooling tower, and the control module is used to control the first air intake module and the second air intake module;

[0010] The first air intake module includes a first bag filter, a first outlet air temperature sensor, a first centrifugal fan, a first pneumatic butterfly valve, a second pneumatic butterfly valve, a third pneumatic butterfly valve, a first heat exchanger, a first primary filter, and a first inlet air temperature sensor;

[0011] The first air outlet temperature sensor is connected to the first bag filter, the first bag filter is connected to the first centrifugal fan, the first centrifugal fan is communicated with the first pneumatic butterfly valve and the second pneumatic butterfly valve, the first heat exchanger is communicated with the second pneumatic butterfly valve, the third pneumatic butterfly valve is communicated with the first heat exchanger, the third pneumatic butterfly valve is communicated with the top of the air inlet and is provided with the first air inlet temperature sensor, and the third pneumatic butterfly valve is connected to the first primary filter.

[0012] Further, the second air inlet module includes:

[0013] A second bag filter, a second air outlet temperature sensor, a second centrifugal fan, a fourth pneumatic butterfly valve, a fifth pneumatic butterfly valve, a sixth pneumatic butterfly valve, a second heat exchanger, a second primary filter, and a second air inlet temperature sensor;

[0014] The second air outlet temperature sensor is connected to the first bag filter and the spray cooling tower, the second bag filter is connected to the second centrifugal fan, the second centrifugal fan is communicated with the fourth pneumatic butterfly valve and the fifth pneumatic butterfly valve, the second heat exchanger is communicated with the fifth pneumatic butterfly valve, the sixth pneumatic butterfly valve is communicated with the second heat exchanger, the sixth pneumatic butterfly valve is communicated with the side of the air inlet and is provided with the second air inlet temperature sensor, and the sixth pneumatic butterfly valve is connected to the second primary filter.

[0015] Further, the spray cooling tower air inlet control system further includes:

[0016] The control module is connected to the first centrifugal fan, the second centrifugal fan, the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve;

[0017] The control module includes a collection unit, a control unit, and an adjustment unit;

[0018] The collection unit is configured to determine a collection area based on the spray cooling tower and determine a target ambient temperature according to the collection area;

[0019] The control unit is configured to control the opening and closing of the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve according to the target ambient temperature, determine a butterfly valve opening degree based on the target ambient temperature, determine a predicted fan speed according to the butterfly valve opening degree and a speed model, and compare the predicted fan speed with historical data, and determine whether to adjust the predicted fan speed according to the comparison result;

[0020] The adjustment unit is configured to determine a speed adjustment factor based on the historical data when determining to adjust the predicted speed of the fan, and adjust the predicted speed of the fan based on the speed adjustment factor.

[0021] Further, when determining the acquisition area based on the spray cooling tower and determining the target ambient temperature according to the acquisition area, it includes:

[0022] The acquisition unit takes the geometric center of the spray cooling tower as the center of the circle, extends in the direction of the wall surface of the spray cooling tower, determines the area height d equal to the height of the spray cooling tower, forms a cylindrical space with a radius of R and the area height d, and removes the spray cooling tower in the cylindrical space to construct the acquisition area;

[0023] Obtain several ambient temperatures of the acquisition area at preset time intervals, and determine the average temperature of the several ambient temperatures as the target ambient temperature.

[0024] Further, when controlling the opening and closing of the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve according to the target ambient temperature, it includes:

[0025] If the target ambient temperature is less than the standard ambient temperature, the control unit closes the second pneumatic butterfly valve and the fifth pneumatic butterfly valve, and opens the first pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, and the sixth pneumatic butterfly valve.

[0026] Further, when determining the butterfly valve opening based on the target ambient temperature, it includes:

[0027] The control unit pre-sets a first preset target ambient temperature and a second preset target ambient temperature, and the first preset target ambient temperature is less than the second preset target ambient temperature;

[0028] The control unit pre-sets a first preset butterfly valve opening, a second preset butterfly valve opening, and a third preset butterfly valve opening, the first preset butterfly valve opening is greater than the second preset butterfly valve opening, and the second preset butterfly valve opening is greater than the third preset butterfly valve opening;

[0029] When the target ambient temperature is greater than or equal to the second preset target ambient temperature, use the third preset butterfly valve opening as the butterfly valve opening;

[0030] When the target ambient temperature is less than the second preset target ambient temperature and greater than the first preset target ambient temperature, use the second preset butterfly valve opening as the butterfly valve opening;

[0031] When the target ambient temperature is less than or equal to the first preset target ambient temperature, use the first preset butterfly valve opening as the butterfly valve opening.

[0032] Further, when determining the predicted fan speed according to the butterfly valve opening and the speed model, it includes:

[0033] Obtain a speed data set, and divide the speed data set into a training set and a test set;

[0034] Use the training set to train the data model, use the test set to test the trained data model, and finally determine the speed model with the butterfly valve opening as the input and the predicted fan speed as the output;

[0035] The data model is a random forest model.

[0036] Further, when comparing the predicted fan speed with historical data and judging whether to adjust the predicted fan speed according to the comparison result, it includes:

[0037] The historical data includes several historical predicted fan speeds, and determine the average value of the historical qualified predicted fan speeds according to the several historical predicted fan speeds;

[0038] If the predicted fan speed is greater than or equal to the average value of the historical qualified predicted fan speeds, the control unit determines not to adjust the predicted fan speed;

[0039] If the predicted fan speed is less than the average value of the historical qualified predicted fan speeds, the control unit determines to adjust the predicted fan speed.

[0040] Further, when determining a speed adjustment factor based on the historical data and adjusting the predicted fan speed based on the speed adjustment factor, it includes:

[0041] The adjustment unit divides the historical predicted fan speeds greater than the average value of the historical qualified predicted fan speeds into an adjustment set, and extracts the maximum value and the minimum value of the historical predicted fan speeds in the adjustment set;

[0042] Obtain the ratio of the maximum value and the minimum value, and determine the speed adjustment factor with e as the base and the ratio as the exponent;

[0043] The predicted fan speed and the speed adjustment factor are in a direct proportional relationship.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting the first air inlet module and the second air inlet module symmetrically about the center axis of the spray cooling tower, compared with the traditional single-cycle air inlet mode, in winter, the working states of the two air inlet modules can be flexibly controlled, and the outside low-temperature air is used for cooling, which improves the flexibility of the air inlet. The first primary filter can perform multi-stage filtration on the incoming air, effectively removing pollutants such as dust and impurities in the air, improving the cleanliness of the air entering the spray cooling tower, reducing the erosion of the interior of the spray cooling tower by pollutants, and extending the service life of the spray cooling tower. Under the action of the control module, the air inlet condition can be reasonably adjusted according to the actual working conditions, improving the heat exchange efficiency of the spray cooling tower, thereby effectively reducing the production energy consumption and reducing the dependence on refrigeration equipment such as chillers. The first air inlet module and the second air inlet module are symmetrically distributed, making the force on the spray cooling tower uniform, reducing problems such as equipment vibration caused by uneven air inlet, and ensuring the stable operation of the spray cooling tower. Under the action of the control module, each component cooperates with each other, further enhancing the stability and reliability of the air inlet control system of the spray cooling tower, providing a strong guarantee for the stable operation of industrial production.

[0045] On the other hand, the present application also provides a method for controlling the air inlet of a spray cooling tower, which is applied to the above-mentioned air inlet control system of the spray cooling tower, and includes:

[0046] Determine the collection area, and determine the target ambient temperature according to the collection area;

[0047] Based on the target ambient temperature, determine the opening degree of the butterfly valve, determine the predicted fan speed according to the opening degree of the butterfly valve and the speed model, and compare the predicted fan speed with historical data, and judge whether to adjust the predicted fan speed according to the comparison result;

[0048] When it is judged to adjust the predicted fan speed, determine the speed adjustment factor based on the historical data, and adjust the predicted fan speed based on the speed adjustment factor.

[0049] It can be understood that the above-mentioned method and system for controlling the air inlet of a spray cooling tower have the same beneficial effects, which will not be elaborated here. Description of the Drawings

[0050] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0051] Figure 1 It is a structural block diagram of an air inlet control system for a spray cooling tower provided by an embodiment of the present invention;

[0052] Figure 2 A flowchart of a method for controlling the air inlet of a spray cooling tower provided by an embodiment of the present invention.

[0053] In the figure, 1 is the first bag filter; 2 is the first outlet air temperature sensor; 3 is the first centrifugal fan; 4 is the first pneumatic butterfly valve; 5 is the second pneumatic butterfly valve; 6 is the first heat exchanger; 7 is the third pneumatic butterfly valve; 8 is the first primary filter; 9 is the first inlet air temperature sensor; 10 is the second bag filter; 11 is the second outlet air temperature sensor; 12 is the second centrifugal fan; 13 is the fourth pneumatic butterfly valve; 14 is the fifth pneumatic butterfly valve; 15 is the second heat exchanger; 16 is the sixth pneumatic butterfly valve; 17 is the second primary filter; 18 is the second inlet air temperature sensor; 19 is the air inlet; 20 is the spray cooling tower. Specific embodiments

[0054] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0055] Refer to Figure 1 As shown, in some embodiments of the present application, a control system for the air inlet of a spray cooling tower includes: a first air inlet module, a second air inlet module, a spray cooling tower 20, an air inlet 19, and a control module. The first air inlet module is axisymmetric with respect to the spray cooling tower 20, the second air inlet module is axisymmetric with respect to the spray cooling tower 20, the air inlet 19 is provided at the top of the spray cooling tower 20, and the control module is used to control the first air inlet module and the second air inlet module. The first air inlet module includes a first bag filter 1, a first outlet air temperature sensor 2, a first centrifugal fan 3, a first pneumatic butterfly valve 4, a second pneumatic butterfly valve 5, a third pneumatic butterfly valve 7, a first heat exchanger 6, a first primary filter 8, and a first inlet air temperature sensor 9. The first outlet air temperature sensor 2 is connected to the first bag filter 1, the first bag filter 1 is connected to the first centrifugal fan 3, the first centrifugal fan 3 is communicated with the first pneumatic butterfly valve 4 and the second pneumatic butterfly valve 5, the first heat exchanger 6 is communicated with the second pneumatic butterfly valve 5, the third pneumatic butterfly valve 7 is communicated with the first heat exchanger 6, the third pneumatic butterfly valve 7 is communicated with the top of the air inlet 19 and is provided with a first inlet air temperature sensor 9, and the third pneumatic butterfly valve 7 is connected to the first primary filter 8.

[0056] In some embodiments of the present application, the second air inlet module includes: a second bag filter 10, a second outlet air temperature sensor 11, a second centrifugal fan 12, a fourth pneumatic butterfly valve 13, a fifth pneumatic butterfly valve 14, a sixth pneumatic butterfly valve 16, a second heat exchanger 15, a second primary filter 17, and a second inlet air temperature sensor 18. The second outlet air temperature sensor 11 is connected to the first bag filter 1 and the spray cooling tower 20. The second bag filter 10 is connected to the second centrifugal fan 12. The second centrifugal fan 12 is communicated with the fourth pneumatic butterfly valve 13 and the fifth pneumatic butterfly valve 14. The second heat exchanger 15 is communicated with the fifth pneumatic butterfly valve 14. The sixth pneumatic butterfly valve 16 is communicated with the second heat exchanger 15. The sixth pneumatic butterfly valve 16 is communicated with the side of the air inlet 19 and is provided with the second inlet air temperature sensor 18. The sixth pneumatic butterfly valve 16 is connected to the second primary filter 17.

[0057] Specifically, a first air inlet module and a second air inlet module that are axisymmetric about the center of the spray cooling tower 20 are provided. Compared with the traditional single-cycle air inlet mode, in winter, the working states of the two air inlet modules can be flexibly controlled, and the outside low-temperature air can be used for cooling, improving the flexibility of the air inlet. The first primary filter 8 can perform multi-stage filtration on the inlet air, effectively removing pollutants such as dust and impurities in the air, improving the cleanliness of the air entering the spray cooling tower 20, reducing the erosion of the interior of the spray cooling tower 20 by pollutants, and extending the service life of the spray cooling tower 20. Under the action of the control module, the air inlet condition can be reasonably adjusted according to the actual working conditions, improving the heat exchange efficiency of the spray cooling tower 20, thereby effectively reducing the production energy consumption and reducing the dependence on refrigeration equipment such as chillers. The first air inlet module and the second air inlet module are symmetrically distributed, making the force on the spray cooling tower 20 uniform, reducing problems such as equipment vibration caused by uneven air inlet, and ensuring the stable operation of the spray cooling tower 20. Under the action of the control module, each component cooperates with each other, further enhancing the stability and reliability of the air inlet control system of the spray cooling tower, providing a strong guarantee for the stable operation of industrial production.

[0058] Specifically, the first primary filter 8 and the second primary filter 17 adopted in the present invention are from Yantai Baoyuan Purification Co., Ltd. The G4 grade counting efficiency E≥90%, the initial resistance: 50Pa, the final resistance: 300Pa, and the treatment capacity is 12000m 3 / h.

[0059] The equipment manufacturers of the first pneumatic butterfly valve 4, the second pneumatic butterfly valve 5, the third pneumatic butterfly valve 7, the fourth pneumatic butterfly valve 13, the fifth pneumatic butterfly valve 14, and the sixth pneumatic butterfly valve 16 are Shanghai Zhenghu Valve Co., Ltd. The model is QD641WX-1P, the nominal diameter is 500mm, and the applicable temperature ≤200°C.

[0060] The equipment manufacturers of the first air outlet temperature sensor 2, the first air inlet temperature sensor 9, the second air outlet temperature sensor 11, and the second air inlet temperature sensor 18 are: Shanghai Honglang Automation Instrument Co., Ltd., model: WZPB-200NJL, output signal: 4-20ma, accuracy: 0.2%, temperature range: -50-100°C, insertion depth: 200mm.

[0061] Specifically, the first pneumatic butterfly valve 4, the fourth pneumatic butterfly valve 13, the first primary filter 8, and the second primary filter 17 can be connected to the atmospheric environment.

[0062] In some embodiments of the present application, for the air inlet control system of the spray cooling tower, it further includes: a control module, connected to the first centrifugal fan 3, the second centrifugal fan 12, the first pneumatic butterfly valve 4, the second pneumatic butterfly valve 5, the third pneumatic butterfly valve 7, the fourth pneumatic butterfly valve 13, the fifth pneumatic butterfly valve 14, and the sixth pneumatic butterfly valve 16. The control module includes an acquisition unit, a control unit, and an adjustment unit. The acquisition unit is configured to determine the acquisition area based on the spray cooling tower 20 and determine the target ambient temperature according to the acquisition area. The control unit is configured to control the opening and closing of the first pneumatic butterfly valve 4, the second pneumatic butterfly valve 5, the third pneumatic butterfly valve 7, the fourth pneumatic butterfly valve 13, the fifth pneumatic butterfly valve 14, and the sixth pneumatic butterfly valve 16 according to the target ambient temperature, determine the butterfly valve opening based on the target ambient temperature, determine the predicted fan speed according to the butterfly valve opening and the speed model, and compare the predicted fan speed with the historical data. Determine whether to adjust the predicted fan speed according to the comparison result. The adjustment unit is configured to determine the speed adjustment factor based on the historical data and adjust the predicted fan speed based on the speed adjustment factor when it is determined to adjust the predicted fan speed.

[0063] Specifically, the acquisition unit determines the acquisition area based on the spray cooling tower 20 and obtains the target ambient temperature. Compared with the single-cycle air intake mode that the spray cooling tower 20 can only perform in winter, the control unit controls the opening and closing and the valve opening of the corresponding pneumatic butterfly valve according to the target ambient temperature, and determines the predicted fan speed. It can directly utilize the outdoor natural wind resources and the material for heat exchange and cooling, without blindly turning on the chiller, effectively reducing the production energy consumption and reducing the energy waste. Moreover, the control unit does not determine the predicted fan speed through the speed model rigidly. The control unit also compares with historical data to judge whether to adjust the predicted fan speed. The adjustment unit determines the speed adjustment factor based on historical data to optimize the predicted fan speeds of the first centrifugal fan 3 and the second centrifugal fan 12, thus realizing intelligent adaptive adjustment. In winter, it can respond to environmental changes in real time. By controlling the opening and closing and the valve opening of the corresponding pneumatic butterfly valve, and the adjustment of the predicted fan speeds of the first centrifugal fan 3 and the second centrifugal fan 12, the natural wind resources in winter enter the interior of the spray cooling tower 20 and exchange heat with the material atomized in the spray cooling tower 20 for cooling, thereby improving the operation efficiency of the air intake control of the spray cooling tower 20, ensuring the production stability, and effectively reducing the energy consumption.

[0064] In some embodiments of the present application, when determining the acquisition area based on the spray cooling tower and determining the target ambient temperature according to the acquisition area, it includes: The acquisition unit takes the geometric center of the spray cooling tower 20 as the center of the circle, extends along the direction of the wall surface of the spray cooling tower 20, and determines the area height d that is the same as the height of the spray cooling tower 20, forms a cylindrical space with a radius of R and an area height d, and removes the spray cooling tower 20 in the cylindrical space to construct the acquisition area, obtains several ambient temperatures of the acquisition area at preset time intervals, and determines the average temperature of the several ambient temperatures as the target ambient temperature.

[0065] Specifically, with the geometric center of the spray cooling tower 20 as the center of the circle, a cylindrical space is extended along the wall surface orientation direction and constructed to have the same height as the tower height. At the same time, the spray cooling tower 20 itself is excluded, fully considering the flow characteristics of the air around the spray cooling tower 20 and the range of the influence of heat exchange. When the spray cooling tower 20 operates in winter, a specific temperature field will be formed in the surrounding air. The cylindrical space can comprehensively cover the air area near the spray cooling tower 20, neither over-collecting the temperature of irrelevant areas nor missing the affected area, so that the collected area can accurately represent the actual environment where the spray cooling tower 20 is located, making the collected ambient temperature representative and providing a reliable basis for subsequent control. At preset time intervals, several ambient temperatures in the collected area are obtained and averaged as the target ambient temperature. By sampling and averaging multiple times, the interference of accidental factors in the environment (such as instantaneous local air flow disturbances, short-term solar radiation changes, etc.) on temperature measurement can be effectively reduced, avoiding the misleading of the overall judgment by individual abnormal temperature values. The obtained target ambient temperature can truly reflect the ambient temperature condition of the collected area, improving the stability and reliability of the operation of the entire inlet air control system of the spray cooling tower.

[0066] In some embodiments of the present application, when controlling the opening and closing of the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve and the sixth pneumatic butterfly valve according to the target ambient temperature, it includes: when the target ambient temperature is less than the standard ambient temperature, the control unit closes the second pneumatic butterfly valve 5 and the fifth pneumatic butterfly valve 14, and opens the first pneumatic butterfly valve 4, the third pneumatic butterfly valve 7, the fourth pneumatic butterfly valve 13 and the sixth pneumatic butterfly valve 16.

[0067] Specifically, when the target ambient temperature is less than the standard ambient temperature, the control unit closes the second pneumatic butterfly valve 5 and the fifth pneumatic butterfly valve 14, and opens the first pneumatic butterfly valve 4, the third pneumatic butterfly valve 7, the fourth pneumatic butterfly valve 13 and the sixth pneumatic butterfly valve 16. At this time, the air of the spray cooling tower 20 is drawn to the outside through the first centrifugal fan 3 and the second centrifugal fan 12 after being dust-removed and filtered by the first bag filter 1 and the second bag filter 10, making the spray cooling tower 20 generate negative pressure, so as to introduce the outdoor air into the first primary filter 8 and the second primary filter 17, and then exchange heat and cool down with the atomized material in the spray cooling tower 20. The standard ambient temperature is determined according to the temperature required by the process of the spray cooling tower 20. By dynamically adjusting the corresponding pneumatic butterfly valves based on the target ambient temperature, not only the precise control of the natural air delivery is ensured, but also the temperature fluctuation can be adaptively processed, improving the automation degree and reliability of the control system.

[0068] In some embodiments of the present application, when determining the butterfly valve opening based on the target ambient temperature, it includes: the control unit pre-sets a first preset target ambient temperature and a second preset target ambient temperature, the first preset target ambient temperature is less than the second preset target ambient temperature, the control unit pre-sets a first preset butterfly valve opening, a second preset butterfly valve opening, and a third preset butterfly valve opening, the first preset butterfly valve opening is greater than the second preset butterfly valve opening, and the second preset butterfly valve opening is greater than the third preset butterfly valve opening. When the target ambient temperature is greater than or equal to the second preset target ambient temperature, the third preset butterfly valve opening is used as the butterfly valve opening. When the target ambient temperature is less than the second preset target ambient temperature and greater than the first preset target ambient temperature, the second preset butterfly valve opening is used as the butterfly valve opening. When the target ambient temperature is less than or equal to the first preset target ambient temperature, the first preset butterfly valve opening is used as the butterfly valve opening.

[0069] Specifically, both the first preset target ambient temperature and the second preset target ambient temperature are less than the standard ambient temperature. By setting different preset target ambient temperatures and corresponding preset butterfly valve openings, the target ambient temperature is divided into different intervals for targeted control. When the target ambient temperature is in different ranges, different preset butterfly valve openings are corresponding to change the degree of air intake, meeting the operation requirements of the spray cooling tower 20 in the winter environment, enabling the system to adaptively adjust according to the actual temperature, and ensuring the stability of the operation state of the spray cooling tower 20.

[0070] In some embodiments of the present application, when determining the predicted fan speed according to the butterfly valve opening and the speed model, it includes: obtaining a speed data set, dividing the speed data set into a training set and a test set, using the training set to train the data model, using the test set to test the trained data model, and finally determining a speed model with the butterfly valve opening as the input and the predicted fan speed as the output. The data model is a random forest model.

[0071] Specifically, the rotational speed data set includes data such as the ambient temperature, pressure, flow rate, and butterfly valve opening of the spray cooling tower 20 at different times. These data record the operating conditions of the spray cooling tower 20 at different time periods. The rotational speed data set is divided into a training set and a test set. Usually, 70%-80% of the data is used as the training set, and the rest is used as the test set. Ensure that both the training set and the test set contain data of various operating conditions to improve the generalization ability of the model. The random forest model is an ensemble learning method composed of multiple decision trees. It can effectively model the complex and non-linear relationship between the butterfly valve opening and the fan rotational speed. The training set is used to train the random forest model. During the training process, the model will learn the internal relationships and rules between the data. Then, the test set is used to test the trained model to verify the generalization ability of the model and avoid overfitting or underfitting problems. The rotational speed model determined through training and testing can reflect the mapping relationship between the butterfly valve opening and the predicted fan rotational speed, enhancing the intelligence level and control reliability of the system.

[0072] In some embodiments of the present application, when comparing the predicted fan rotational speed with historical data and determining whether to adjust the predicted fan rotational speed according to the comparison result, it includes: The historical data includes several historical predicted fan rotational speeds. The average value of the historical qualified predicted fan rotational speeds is determined based on the several historical predicted fan rotational speeds. If the predicted fan rotational speed is greater than or equal to the average value of the historical qualified predicted fan rotational speeds, the control unit determines not to adjust the predicted fan rotational speed. If the predicted fan rotational speed is less than the average value of the historical qualified predicted fan rotational speeds, the control unit determines to adjust the predicted fan rotational speed.

[0073] Specifically, the average value of the historical qualified predicted fan rotational speeds can be set according to the actual process requirements of the spray cooling tower 20, and whether to adjust the predicted fan rotational speed is judged based on this. When the predicted fan rotational speed is greater than or equal to the average value of the historical qualified predicted fan rotational speeds, it is considered to be within a reasonable range and no adjustment is required. When the predicted fan rotational speed is less than the average value of the historical qualified predicted fan rotational speeds, it is considered that the rotational speed does not match the current environment and the natural wind cannot be effectively introduced into the spray cooling tower 20. Therefore, it is necessary to adjust the predicted fan rotational speed. Using historical data to form a judgment criterion enables the adjustment of the predicted fan rotational speed to be based on objective data rather than relying on subjective experience or simple rules, thus realizing intelligent adjustment. Moreover, as more historical data accumulates during the operation of the system, the judgment criterion can be continuously improved, further enhancing the automation level and control accuracy of the system.

[0074] In some embodiments of the present application, when determining the rotational speed adjustment factor based on historical data and adjusting the predicted rotational speed of the fan based on the rotational speed adjustment factor, it includes: The adjustment unit divides the historical fan predicted rotational speeds greater than the average value of the historical qualified fan predicted rotational speeds into an adjustment set, extracts the maximum value and the minimum value of the historical fan predicted rotational speeds in the adjustment set, obtains the ratio of the maximum value to the minimum value, and determines the rotational speed adjustment factor as the power with e as the base and the ratio as the exponent. The predicted rotational speed of the fan is in a direct proportion relationship with the rotational speed adjustment factor.

[0075] Specifically, by screening out the historical fan predicted rotational speeds greater than the average value of the historical qualified fan predicted rotational speeds to form an adjustment set, focusing on the data at a relatively high rotational speed level and meeting the qualification in the historical data, specifically extracting the maximum value and the minimum value within this set, and determining the rotational speed adjustment factor by taking the power with e as the base of their ratio, it effectively utilizes the characteristics of the historical data and avoids general processing of all data. Since the rotational speed adjustment factor is in a direct proportion relationship with the predicted rotational speed of the fan, when factors such as the ambient temperature change, the rotational speed adjustment factor dynamically determined based on historical data can adaptively adjust the predicted rotational speed of the fan, ensuring that the air intake system of the spray cooling tower 20 is always in a good operating state in environments such as winter, and improving the automation level of the system. Assuming the rotational speed adjustment factor is K and the predicted rotational speed of the fan is V, then the adjusted predicted rotational speed of the fan is K * V. When it is necessary to increase the predicted rotational speed of the fan, it is adjusted according to the rotational speed adjustment factor, so that the adjusted predicted rotational speed of the fan matches the actual environment. While ensuring system control, it reduces energy consumption and guarantees the operating efficiency of the spray cooling tower 20.

[0076] In another preferred manner based on the above embodiments, refer to Figure 2 As shown, this embodiment provides a method for controlling the air intake of a spray cooling tower, which is applied to the above-mentioned air intake control system of the spray cooling tower, and includes:

[0077] S100: Determine the acquisition area and determine the target ambient temperature according to the acquisition area.

[0078] S200: Determine the butterfly valve opening based on the target ambient temperature, determine the predicted rotational speed of the fan according to the butterfly valve opening and the rotational speed model, compare the predicted rotational speed of the fan with the historical data, and determine whether to adjust the predicted rotational speed of the fan according to the comparison result.

[0079] S300: When it is determined to adjust the predicted rotational speed of the fan, determine the rotational speed adjustment factor based on historical data and adjust the predicted rotational speed of the fan based on the rotational speed adjustment factor.

[0080] Specifically, by setting the first air inlet module and the second air inlet module that are axisymmetric about the center of the spray cooling tower, compared with the traditional single-cycle air inlet mode, in winter, the working states of the two air inlet modules can be flexibly controlled, and the outside low-temperature air can be used for cooling, improving the flexibility of the air inlet. The first primary filter can perform multi-stage filtration on the incoming air, effectively removing pollutants such as dust and impurities in the air, improving the cleanliness of the air entering the spray cooling tower, reducing the erosion of pollutants on the inside of the spray cooling tower, and extending the service life of the spray cooling tower. Under the action of the control module, the air inlet condition can be reasonably adjusted according to the actual working conditions, improving the heat exchange efficiency of the spray cooling tower, thereby effectively reducing the production energy consumption and reducing the dependence on refrigeration equipment such as chillers. The symmetric distribution of the first air inlet module and the second air inlet module makes the force on the spray cooling tower uniform, reducing problems such as equipment vibration caused by uneven air inlet, and ensuring the stable operation of the spray cooling tower. Under the action of the control module, each component cooperates with each other, further enhancing the stability and reliability of the air inlet control system of the spray cooling tower, providing a strong guarantee for the stable operation of industrial production.

[0081] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0082] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one or more of the flows Figure 1 or multiple flows and / or blocks

[0083] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in Figure 1 one or more of the flows Figure 1The functions specified in one or more boxes.

[0084] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing the steps of the functions specified in one Figure 1 one process or more processes and / or boxes Figure 1 step of the functions specified in one or more boxes.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A control system for the air inlet of a spray cooling tower, characterized in that, Including: A first air inlet module, a second air inlet module, a spray cooling tower, an air inlet, and a control module; The first air inlet module is axially symmetric about the spray cooling tower, and the second air inlet module is axially symmetric about the spray cooling tower; The air inlet is arranged at the top of the spray cooling tower, and the control module is used to control the first air inlet module and the second air inlet module; The first air inlet module includes a first bag filter, a first outlet air temperature sensor, a first centrifugal fan, a first pneumatic butterfly valve, a second pneumatic butterfly valve, a third pneumatic butterfly valve, a first heat exchanger, a first primary filter, and a first inlet air temperature sensor; The first outlet air temperature sensor is connected to the first bag filter, the first bag filter is connected to the first centrifugal fan, the first centrifugal fan is communicated with the first pneumatic butterfly valve and the second pneumatic butterfly valve, the first heat exchanger is communicated with the second pneumatic butterfly valve, the third pneumatic butterfly valve is communicated with the first heat exchanger, the third pneumatic butterfly valve is communicated with the top of the air inlet and is provided with the first inlet air temperature sensor, and the third pneumatic butterfly valve is connected to the first primary filter.

2. The inlet air control system for a spray cooling tower according to claim 1, characterized in that, The second air inlet module includes: A second bag filter, a second outlet air temperature sensor, a second centrifugal fan, a fourth pneumatic butterfly valve, a fifth pneumatic butterfly valve, a sixth pneumatic butterfly valve, a second heat exchanger, a second primary filter, and a second inlet air temperature sensor; The second outlet air temperature sensor is connected to the first bag filter and the spray cooling tower, the second bag filter is connected to the second centrifugal fan, the second centrifugal fan is communicated with the fourth pneumatic butterfly valve and the fifth pneumatic butterfly valve, the second heat exchanger is communicated with the fifth pneumatic butterfly valve, the sixth pneumatic butterfly valve is communicated with the second heat exchanger, the sixth pneumatic butterfly valve is communicated with the side of the air inlet and is provided with the second inlet air temperature sensor, and the sixth pneumatic butterfly valve is connected to the second primary filter.

3. The air inlet control system for the spray cooling tower according to claim 2, characterized in that, It further includes: The control module is connected to the first centrifugal fan, the second centrifugal fan, the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve; The control module includes an acquisition unit, a control unit, and an adjustment unit; The acquisition unit is configured to determine an acquisition area based on the spray cooling tower and determine a target ambient temperature according to the acquisition area; The control unit is configured to control the opening and closing of the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve according to the target ambient temperature, determine the butterfly valve opening based on the target ambient temperature, determine the predicted fan speed according to the butterfly valve opening and the speed model, and compare the predicted fan speed with historical data, and judge whether to adjust the predicted fan speed according to the comparison result; The adjustment unit is configured to, when it is judged to adjust the predicted fan speed, determine a speed adjustment factor based on the historical data and adjust the predicted fan speed based on the speed adjustment factor.

4. The air inlet control system for the spray cooling tower according to claim 3, wherein, When determining the acquisition area based on the spray cooling tower and determining the target ambient temperature according to the acquisition area, it includes: The acquisition unit takes the geometric center of the spray cooling tower as the center of the circle, extends along the direction facing the wall surface of the spray cooling tower, determines the area height d that is the same as the height of the spray cooling tower, forms a cylindrical space with a radius of R and the area height d, and removes the spray cooling tower from the cylindrical space to construct the acquisition area; Obtain several ambient temperatures of the acquisition area at preset time intervals, and determine the temperature average value of the several ambient temperatures as the target ambient temperature.

5. The air inlet control system for the spray cooling tower according to claim 4, characterized in that, When controlling the opening and closing of the first pneumatic butterfly valve, the second pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, the fifth pneumatic butterfly valve, and the sixth pneumatic butterfly valve according to the target ambient temperature, it includes: If the target ambient temperature is less than the standard ambient temperature, the control unit closes the second pneumatic butterfly valve and the fifth pneumatic butterfly valve, and opens the first pneumatic butterfly valve, the third pneumatic butterfly valve, the fourth pneumatic butterfly valve, and the sixth pneumatic butterfly valve.

6. The air inlet control system for the spray cooling tower according to claim 5, wherein When determining the butterfly valve opening based on the target ambient temperature, it includes: The control unit preset a first preset target ambient temperature and a second preset target ambient temperature, and the first preset target ambient temperature is less than the second preset target ambient temperature; The control unit preset a first preset butterfly valve opening, a second preset butterfly valve opening, and a third preset butterfly valve opening, the first preset butterfly valve opening is greater than the second preset butterfly valve opening, and the second preset butterfly valve opening is greater than the third preset butterfly valve opening; When the target ambient temperature is greater than or equal to the second preset target ambient temperature, use the third preset butterfly valve opening as the butterfly valve opening; When the target ambient temperature is less than the second preset target ambient temperature and greater than the first preset target ambient temperature, use the second preset butterfly valve opening as the butterfly valve opening; When the target ambient temperature is less than or equal to the first preset target ambient temperature, use the first preset butterfly valve opening as the butterfly valve opening.

7. The inlet air control system for the spray cooling tower according to claim 6, characterized in that, When determining the predicted fan speed according to the butterfly valve opening and the speed model, it includes: Obtain a speed data set, and divide the speed data set into a training set and a test set; Use the training set to train the data model, use the test set to test the trained data model, and finally determine the speed model with the butterfly valve opening as the input and the predicted fan speed as the output; The data model is a random forest model.

8. The air inlet control system for the spray cooling tower according to claim 7, characterized in that, When comparing the predicted fan speed with historical data and judging whether to adjust the predicted fan speed according to the comparison result, it includes: The historical data includes several historical predicted fan speeds, and determine the average value of the historical qualified predicted fan speeds according to the several historical predicted fan speeds; If the predicted fan speed is greater than or equal to the average value of the historical qualified predicted fan speeds, the control unit determines not to adjust the predicted fan speed; If the predicted fan speed is less than the average value of the historical qualified predicted fan speeds, the control unit determines to adjust the predicted fan speed.

9. The inlet air control system for the spray cooling tower according to claim 8, characterized in that, When determining the rotational speed adjustment factor based on the historical data and adjusting the predicted rotational speed of the fan based on the rotational speed adjustment factor, it includes: The adjustment unit divides the historical fan predicted rotational speeds greater than the average value of the historical qualified fan predicted rotational speeds into an adjustment set, and extracts the maximum value and the minimum value of the historical fan predicted rotational speeds in the adjustment set; Obtain the ratio of the maximum value and the minimum value, and determine the rotational speed adjustment factor with the power of which the base is e and the exponent is the ratio; The predicted rotational speed of the fan is in a direct proportional relationship with the rotational speed adjustment factor.

10. A method for controlling the inlet air of a spray cooling tower, which is applied to the inlet air control system of a spray cooling tower as described in any one of claims 1-9, characterized in that, It includes: Determine the acquisition area, and determine the target ambient temperature according to the acquisition area; Determine the butterfly valve opening based on the target ambient temperature, determine the predicted rotational speed of the fan according to the butterfly valve opening and the rotational speed model, compare the predicted rotational speed of the fan with the historical data, and judge whether to adjust the predicted rotational speed of the fan according to the comparison result; When it is judged to adjust the predicted rotational speed of the fan, determine the rotational speed adjustment factor based on the historical data, and adjust the predicted rotational speed of the fan based on the rotational speed adjustment factor.

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