Control method and drying equipment for industrial production drying system

Abstract

The present invention relates to the technical field of drying systems, and specifically to a control method and drying equipment for an industrial production drying system. The control method for the industrial production drying system comprises: a main body, which is provided with a circulating fan assembly, a dehumidification fan assembly and a heating assembly; a first moisture content sensor, which is arranged at the inlet and outlet of the main body; a first temperature sensor, which is arranged at the midstream section of the main body; a first humidity sensor, which is arranged at the midstream section of the main body; a second humidity sensor, which is arranged at the downstream section of the main body; and a second temperature sensor, which is arranged at the downstream section of the main body. The control method for the industrial production drying system provided by the present invention can adjust the set parameters of each part of the mechanism online with process parameters as the target, has strong timeliness, and has high energy utilization rate and automation degree.

Description

Technical Field

[0001] The present invention relates to the technical field of drying systems, and in particular to a control method and drying equipment for an industrial production drying system. Background Art

[0002] The common drying method in industry is to use natural gas direct heating or steam drying to evaporate the moisture on the surface of industrial products, and at the same time, to diffuse the internal moisture to the surface of the fabric and evaporate it out by heating. This method not only has a drying effect, but also has an important impact on the physical indicators and feel of the product. Therefore, the key operating parameters of the drying equipment affect the quality and production cost of industrial products, and need to be reasonably designed and operated efficiently.

[0003] At present, the key operating parameter monitoring mode in the control method of industrial production drying system is too simple. Most of them only monitor the internal temperature and the speed of the internal circulation fan. The control of drying equipment and the improvement of energy efficiency are seriously restricted. In order to characterize the rationality of the equipment operation parameters, it is necessary to verify the product quality of the production line by offline testing, and repeatedly debug the various parameters of the drying equipment according to the verification results. This method has the following technical defects: First, the verification can only be carried out after the product is dried, and the timeliness is poor; second, the drying equipment needs to be adjusted manually, which requires high personnel quality and increases labor costs. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor timeliness and low energy utilization rate of existing drying equipment when verifying the rationality of parameters, thereby providing a control method for an industrial production drying system.

[0005] The control method of the industrial production drying system provided by the present invention comprises:

[0006] The main body is provided with a circulation fan assembly, a dehumidification fan assembly and a heating assembly;

[0007] A first moisture content sensor is disposed at the inlet of the main body and is suitable for detecting the moisture content of the product to be introduced into the main body;

[0008] A first temperature sensor, disposed in the midstream section of the main body, adapted to detect the temperature of the air in the midstream section of the main body;

[0009] A first humidity sensor, disposed in the midstream section of the main body, adapted to detect the humidity of the air in the midstream section of the main body;

[0010] a second humidity sensor, disposed in the downstream section of the main body, adapted to detect the humidity of the air in the downstream section of the main body;

[0011] The second temperature sensor is disposed in the downstream section of the main body and is suitable for detecting the temperature of the air in the downstream section of the main body.

[0012] Optionally, also include:

[0013] A second moisture content sensor is disposed at the outlet of the main body and is suitable for detecting the moisture content of the product output from the main body;

[0014] The gram weight sensor is arranged at the outlet of the main body and is suitable for detecting the gram weight of the product output from the main body.

[0015] Optionally, also include:

[0016] The control processor is suitable for receiving the detection signal of the first moisture content sensor and determining the process parameters in the drying process according to the moisture-heat balance equation; the control processor is also suitable for receiving the detection signal of the first temperature sensor and the detection signal of the first humidity sensor, and feedback-adjusting the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; the control processor is also suitable for receiving the detection signal of the second moisture content sensor and the detection signal of the gram weight sensor, and feedback-modifying the moisture-heat balance equation until the physical properties of the product meet the requirements.

[0017] Optionally, also include:

[0018] a third humidity sensor, disposed in the upstream section of the main body, adapted to detect the humidity of the air in the upstream section of the main body;

[0019] The third temperature sensor is disposed in the upstream section of the main body and is suitable for detecting the temperature of the air in the upstream section of the main body.

[0020] Optionally, a particle detection sensor is provided in the dehumidification fan assembly, which is suitable for detecting the concentration of flue gas emitted by the main equipment.

[0021] A control method for an industrial production drying system:

[0022] S1. Determine the amount of water evaporation required in the product according to the moisture content of the product detected by the first moisture sensor, and calculate the amount of heat required to be provided according to the moisture evaporation and the moisture-heat balance equation;

[0023] S2. Determine the process parameters of the drying process according to the heat calculated in step S1, thereby setting parameters for the circulation fan component, the dehumidification fan component and the heating component;

[0024] S3. According to the detection values ​​of the first temperature sensor and the first humidity sensor, the detection values ​​of the second temperature sensor and the second humidity sensor, verify whether the set parameters are accurate, determine whether the product is under-baked or over-baked, and feedback-adjust the set parameters of the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements.

[0025] Optionally, also include:

[0026] S4. According to the detection value of the second moisture content sensor and the detection value of the gram weight sensor, determine whether the physical properties of the product after drying meet the requirements; if not, immediately optimize the moisture and heat balance equation and redetermine the process parameters until the product properties are met.

[0027] Optionally, steps S1-S4 are all automatically operated by a control processor, which receives the detection signal of the first moisture content sensor, and determines the process parameters in the drying process according to the moisture-heat balance equation; the control processor receives the detection signal of the first temperature sensor and the detection signal of the first humidity sensor, the detection signal of the second temperature sensor and the detection signal of the second humidity sensor, and feedback-adjusts the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; the control processor receives the detection signal of the second moisture content sensor and the detection signal of the gram weight sensor, and feedback-modifies the moisture-heat balance equation until the physical properties of the product meet the requirements.

[0028] Optional options include:

[0029] S5. Use a particle detection sensor to detect the exhaust flue gas concentration at the outlet of the dehumidification fan assembly to generate a flue gas concentration detection value.

[0030] A drying device uses the control method of the industrial production drying system described above.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. The control method of the industrial production drying system provided by the present invention is provided with a first moisture content sensor, which can detect the moisture content in the product, determine the required heat according to the moisture content of the product and the moisture-heat balance equation, and determine the process value in the drying process according to the required heat, thereby assigning setting parameters to the circulating fan component, the dehumidification fan component and the heating component; it is also provided with a first temperature sensor and a first humidity sensor, which can determine whether the actual detected process parameters are the same as the target process parameters through the detection signals of the two, thereby adaptively adjusting the circulating fan component, the dehumidification fan component and the heating component to meet the process parameter requirements; it is also provided with a second humidity sensor and a second temperature sensor, both of which are located in the downstream section of the main body, and can perform preliminary monitoring on whether the product is under-dried or over-dried, and provide timely feedback to modify the moisture-heat balance equation. The control method of the industrial production drying system can determine the temperature and humidity process parameters of the drying process by monitoring the moisture content of the product and combining it with the moisture-heat balance equation. According to the process parameters, the setting parameters of the circulating fan component, the dehumidification fan component and the heating component can be assigned, and the feedback adjustment of the setting parameters of the circulating fan component, the dehumidification fan component and the heating component can be completed according to the detection values ​​of the first temperature sensor and the first humidity sensor; compared with the existing products that adjust the parameters of each mechanism separately after offline verification, the control method of the industrial production drying system can take the process parameters as the target and adjust the setting parameters of each mechanism online, which is more timely. In addition, by detecting the moisture content of the product, it can also be linked with the upstream equipment to adjust the process parameters of the upstream equipment.

[0033] 2. The control method of the industrial production drying system provided by the present invention is also provided with a second moisture content sensor and a gram weight sensor, which can instantly optimize the moisture-heat balance equation and redefine the process parameters according to the detection of the actual physical properties of the product, thereby adjusting the set parameters of each mechanism to better meet the physical properties of the product.

[0034] 3. The control method of the industrial production drying system provided by the present invention is also provided with a control processor, which is suitable for receiving the detection signal of the first moisture content sensor, and determining the process parameters in the drying process according to the moisture-heat balance equation; it is also suitable for receiving the detection signal of the first temperature sensor and the detection signal of the first humidity sensor, and feedback-adjusting the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; it is also suitable for receiving the detection signal of the second moisture content sensor and the detection signal of the gram weight sensor, and immediately feedback-optimizing the moisture-heat balance equation until the product properties meet the requirements. In this way, the automation of each process is realized, and manual adjustment is no longer required, the requirements for personnel quality are relatively low, and the labor cost is reduced.

[0035] 4. The control method of the industrial production drying system provided by the present invention is also provided with a third humidity sensor and a third temperature sensor, which can monitor the entire drying process in conjunction with other humidity sensors and temperature sensors to better control the entire drying process.

[0036] 5. The control method of the industrial production drying system provided by the present invention is also provided with a particle detection sensor, which can detect the particle during the drying process. When the detection value is greater than the required value, the exhaust gas is filtered to ensure that the air is not polluted during the production process.

[0037] 6. The control method of the industrial production drying system provided by the present invention can detect the moisture content of the product according to the first moisture content sensor, and determine the drying process parameters according to the moisture content of the product combined with the moisture-heat balance equation, thereby giving the circulating fan component, the dehumidification fan component and the heating component setting parameters, and during the drying process, the temperature and humidity in the oven can be monitored online by the first temperature sensor and the first humidity sensor, and the setting parameters of the circulating fan component, the dehumidification fan component and the heating component can be adjusted by feedback to meet the process parameter requirements. This method can timely adjust the setting parameters of each mechanism of the drying oven through online monitoring, and has strong timeliness.

[0038] 7. The control method of the industrial production drying system provided by the present invention can feedback adjust the moisture-heat balance equation according to the detection of the actual physical properties of the product, redefine the process parameters, and thus adjust the set parameters of each mechanism to better meet the physical properties of the product.

[0039] 8. The control method of the industrial production drying system provided by the present invention can realize the automatic operation of each process by controlling the processor, and no longer requires manual adjustment, has low requirements on personnel quality, and reduces labor costs.

[0040] 9. The control method of the industrial production drying system provided by the present invention can perform preliminary monitoring on whether the product is under-dried or over-dried, and provide timely feedback to optimize the moisture-heat balance formula.

[0041] 10. The drying equipment provided by the present invention uses any of the control methods for industrial production drying systems described above, and thus has any of the advantages described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a control method for an industrial production drying system in an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1. Main body; 2. First moisture content sensor; 3. First temperature sensor; 4. First humidity sensor; 5. Second moisture content sensor; 6. Gram weight sensor; 7. Second humidity sensor; 8. Second temperature sensor; 9. Third humidity sensor; 10. Third temperature sensor; 11. Particle detection sensor. DETAILED DESCRIPTION

[0045] Example 1

[0046] like Figure 1 A specific implementation of a control method for an industrial production drying system shown includes:

[0047] The main body 1 is provided with a circulation fan assembly, a dehumidification fan assembly and a heating assembly;

[0048] A first moisture content sensor 2 is provided at the entrance of the main body 1 and is suitable for detecting the moisture content of the product to be introduced into the main body 1;

[0049] The first temperature sensor 3 is disposed in the midstream section of the main body 1 and is suitable for detecting the temperature of the air in the midstream section of the main body 1;

[0050] The first humidity sensor 4 is disposed in the midstream section of the main body 1 and is suitable for detecting the humidity of the air in the midstream section of the main body 1;

[0051] The second humidity sensor 7 is disposed in the downstream section of the main body 1 and is suitable for detecting the humidity of the air in the downstream section of the main body 1;

[0052] The second temperature sensor 8 is disposed in the downstream section of the main body 1 and is suitable for detecting the temperature of the air in the downstream section of the main body 1 .

[0053] In the above specific implementation, the moisture content in the product can be detected by the above first moisture content sensor 2, and the required heat can be determined according to the moisture content of the product and the moisture-heat balance equation. According to the required heat, the process value in the drying process can be determined, thereby assigning setting parameters to the circulating fan component, the dehumidification fan component and the heating component; through the above first temperature sensor 3 and the first humidity sensor 4, the temperature and humidity in the oven can be detected to determine whether the actual detected process parameters are the same as the target process parameters, thereby adaptively adjusting the circulating fan component, the dehumidification fan component and the heating component to meet the process parameter requirements; a second humidity sensor and a second temperature sensor are also provided, both of which are located in the downstream section of the main body, and can perform preliminary monitoring on whether the product is under-baked or over-baked, and timely feedback to modify the moisture-heat balance equation. Compared with the existing method of adjusting the parameters of each mechanism separately after offline verification of the product, the above specific implementation can adjust the setting parameters of each mechanism online with the process parameters as the target, and has a strong timeliness.

[0054] It should be noted that the "parameters" in the so-called "parameter control" are the setting parameters of each mechanism.

[0055] In the prior art, since the key parameter monitoring mode in the drying equipment is relatively simple, the set parameters of each mechanism can only be adjusted through feedback through offline product testing. Each adjustment must be verified through offline product testing, which has poor timeliness and laborious adjustment; and there is no process parameter as the target, which makes adjustment difficult and requires high personnel quality. Compared with the prior art, the main innovations of the above specific implementation methods are: first, the required heat is determined according to the product quantity and the moisture-heat balance equation, the process parameters (temperature, humidity) are determined according to the heat, and the set parameters of each mechanism are determined according to the process parameters. The target value of each mechanism adjustment is transferred from offline product verification to online process parameter comparison, which has high timeliness; second, using process parameters as target values ​​to adjust the set parameters of each mechanism can reasonably use energy and avoid unnecessary waste. At the same time, it also reduces the requirements for personnel quality and saves manpower.

[0056] In detail, the moisture and heat balance formula specifically includes:

[0057] The total energy required for drying equipment is

[0058]

[0059] The total heat energy required by the drying equipment includes the heat energy required for product heating, the heat energy required for water evaporation and vaporization, the heat energy required for heating the fresh air of the drying equipment, and the heat loss caused by the heat dissipation of the drying equipment. In the equation, c is the specific heat capacity, m is the mass, and T is the temperature.

[0060] The humidity balance equation in the drying equipment is:

[0061] Δρ=ρ1-ρ2

[0062] In the humidity balance equation, Δρ is the moisture increase in the drying equipment, ρ1 is the moisture content of the product before it enters the drying equipment, and ρ2 is the moisture content of the product after it comes out of the drying equipment.

[0063] Specifically, the first moisture content sensor 2 adopts a high moisture content online detection device based on the microwave principle, the first humidity sensor 4 adopts a water vapor content online detection device based on tunable laser absorption spectroscopy (TDLAS), and the first temperature sensor 3 adopts an infrared temperature online detection device.

[0064] Specifically, the second temperature sensor 8 is an online temperature detection device based on infrared, and the second humidity sensor 7 is an online water vapor content detection device based on infrared spectrum.

[0065] As an improved implementation, it also includes:

[0066] A second moisture content sensor 5 is provided at the outlet of the main body 1 and is suitable for detecting the moisture content of the product output from the main body 1;

[0067] The gram weight sensor 6 is disposed at the outlet of the main body 1 and is suitable for detecting the gram weight of the product output from the main body 1 .

[0068] The above-mentioned improved implementation method determines whether the determined moisture-heat balance equation is appropriate by detecting the moisture content and gram weight of the product output from the oven. If it is inappropriate, the moisture-heat balance equation is optimized immediately, the process parameters are redetermined, and then the setting parameters of each part of the mechanism are determined, so that each setting parameter can better meet the process requirements.

[0069] Specifically, the second moisture content sensor 5 adopts a low moisture content online detection device based on the principle of near-infrared spectroscopy, and the gram weight sensor 6 adopts a weight online detection device based on the principle of low-energy X-ray attenuation.

[0070] As an improved implementation, it also includes:

[0071] The control processor is suitable for receiving the detection signal of the first moisture content sensor 2, and determining the process parameters in the drying process according to the moisture-heat balance equation; the control processor is also suitable for receiving the detection signal of the first temperature sensor 3 and the detection signal of the first humidity sensor 4, and feedback-adjusting the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; the control processor is also suitable for receiving the detection signal of the second moisture content sensor 5 and the detection signal of the gram weight sensor 6, and instantly optimizing the moisture-heat balance equation until the physical properties of the product meet the requirements.

[0072] The above improved implementation method realizes the automated operation of each process by controlling the processor, and no longer requires manual adjustment, has low requirements on personnel quality, and reduces labor costs.

[0073] As a way of improvement, it also includes:

[0074] The third humidity sensor 9 is disposed in the upstream section of the main body 1 and is suitable for detecting the humidity of the air in the upstream section of the main body 1;

[0075] The third temperature sensor 10 is disposed at the upstream section of the main body 1 and is suitable for detecting the temperature of the air in the upstream section of the main body 1 .

[0076] The above improved implementation mode, in conjunction with other sensors, can monitor the entire drying process, thereby better controlling the entire drying process.

[0077] Specifically, the third temperature sensor 10 is an online temperature detection device based on infrared, and the third humidity sensor 9 is an online water vapor content detection device based on infrared spectrum.

[0078] As an improved implementation, a particle detection sensor 11 is provided in the dehumidification fan assembly.

[0079] The above improved implementation method can detect particulate matter in the dehumidification pipe during the drying process. An alarm device and an exhaust gas treatment device can be configured during actual operation. If the standard is exceeded, the alarm device is activated and the exhaust gas treatment device treats the exhaust gas to avoid air pollution.

[0080] Example 2

[0081] A specific implementation method of a control method for an industrial production drying system, combined with Figure 1 , including the following steps:

[0082] S1. Determine the amount of water evaporation required in the product according to the moisture content of the product detected by the first moisture sensor 2, and calculate the heat required to be provided according to the moisture evaporation and the moisture-heat balance equation;

[0083] S2. Determine the process parameters of the drying process according to the heat calculated in step S1, thereby setting parameters for the circulation fan component, the dehumidification fan component and the heating component;

[0084] S3. Verify whether the set parameters are accurate based on the detection values ​​of the first temperature sensor 3 and the first humidity sensor 4, and feedback-adjust the set parameters of the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements.

[0085] The above specific implementation method can first determine the heat according to the moisture content of the product in combination with the moisture-heat balance equation, determine the process parameters according to the heat, and then assign the circulating fan component, the dehumidification fan component and the heating component setting parameters based on the process parameters. In addition, during the drying process, it can determine whether the aforementioned setting parameters can meet the process parameter requirements according to the temperature and humidity detected in real time by the first temperature sensor 3 and the first humidity sensor 4. If not, the aforementioned setting parameters are adjusted until the process parameter requirements are met. This method can timely adjust the setting parameters of each mechanism of the drying box through online monitoring to meet the process parameter requirements, and has strong timeliness.

[0086] As an improved implementation, it also includes:

[0087] S4. According to the detection value of the second moisture content sensor 5 and the detection value of the gram weight sensor 6, determine whether the physical properties of the product meet the requirements; if not, immediately optimize the moisture and heat balance equation and redetermine the process parameters until the physical properties of the product are met.

[0088] The above-mentioned improved implementation mode can feedback and adjust the moisture-heat balance equation according to the detection of the actual physical properties of the product, redefine the process parameters, and thus adjust the setting parameters of each mechanism to better meet the physical properties of the product.

[0089] As an improved implementation mode, steps S1-S4 are all automatically operated by the control processor, which receives the detection signal of the first moisture content sensor 2, and determines the process parameters in the drying process according to the moisture-heat balance equation; the control processor receives the detection signal of the first temperature sensor 3 and the detection signal of the first humidity sensor 4, and feedback-adjusts the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; the control processor receives the detection signal of the second moisture content sensor 5 and the detection signal of the gram weight sensor 6, and feedback-modifies the moisture-heat balance equation until the physical properties of the product meet the requirements.

[0090] The above-mentioned improved implementation method can realize the automatic operation of each process by controlling the processor, and no longer requires manual adjustment, has low requirements on personnel quality, and reduces labor costs.

[0091] As an alternative to the above-mentioned improved method, steps S1-S4 are all operated manually, that is, the required heat is manually determined according to the moisture content of the product and the moisture-heat balance equation, and then the process parameters in the drying process are manually determined according to the required heat, and then the setting parameters of each mechanism are manually assigned. After the physical property detection of the product is completed, the moisture-heat balance equation is manually modified, the process parameters are re-determined, and the setting parameters of each mechanism are re-determined until the physical properties of the product meet the requirements.

[0092] As an improved implementation method, during the drying process, the detection value of the second humidity sensor 7 and the detection value of the second temperature sensor 8 are used to determine whether the product is under-baked or over-baked; if under-baked or over-baked, the moisture-heat balance equation is modified until the requirements are met.

[0093] The above improved implementation method can monitor the dried products in real time. If the products are under-baked or over-baked, the moisture-heat balance equation can be adjusted in time, thereby avoiding the phenomenon of over-baking or under-baking of large quantities of products.

[0094] As an improved implementation, it also includes:

[0095] S5. Use the particle detection sensor 11 to detect the exhaust flue gas at the outlet of the dehumidification fan assembly to generate a flue gas concentration detection value.

[0096] Specifically, the exhaust gas is detected according to the gas detection value generated by the particle detection sensor 11 to ensure that the exhaust gas of the dehumidification fan assembly does not pollute the air during the production process.

[0097] Example 3

[0098] The control method of the industrial production drying system provided in the above embodiment can be applied to any drying equipment, wherein the drying equipment can be a drying box, a dryer, etc.

[0099] For example, taking a textile factory dryer as an example, the speed of the dryer inlet dehumidification fan is 19000m 3 / h, outlet dehumidification fan wind speed is 11000m 3 / h, four circulating fans, each with a speed of 65000m 3 / h. The water vapor content of the outlet air should be 21.89g / m 3 The water vapor content of the inlet air should be 28.5 g / m3 at a temperature of 112°C and a relative humidity of 3.3%. 3 The water vapor discharge at the inlet is 0.542t / h, and the water vapor discharge at the outlet is 0.241t / h, and the water vapor discharge per hour is nearly 0.783t / h (including water generated by natural gas combustion). 3 / h, the density of natural gas is 0.7174kg / m 3 The natural gas combustion mass is 86.09kg / h. According to the mass ratio of CH4 and 2H20 of 4:9, the mass of water generated after combustion is 194kg / h. Therefore, to remove the water vapor generated by the combustion of natural gas, the water in the textile needs to be evaporated at 589kg / h. Therefore, the temperature of each section of the dryer and the speed of the circulating fan can be adjusted according to the needs.

[0100] Without changing the moisture content of the outlet cloth, adjusting the internal temperature of the dryer and the frequency of the dehumidification fan can reduce energy consumption. When the exhaust humidity is 110℃ and the pressure is 1 atmosphere, evaporation of 1kg of water produces 1.700m 3 The humidity rises from 4% to 10%, which can reduce the emission of 110℃ dry hot air by 26.2m 3 This means that 26.2m less can be added 3 When the air temperature is 20℃ and the temperature rises to 110℃, according to the specific heat capacity (20℃ air is 1.013kJ / (kg·K), 110℃ air is 1.024kJ / (kg·K), the density of air at 110℃ is 0.893kg / m 3), the energy consumption is 2700kJ. That is, 2700kJ / kg of energy can be saved for every 1kg of water evaporated. Therefore, the humidity in the drying oven can be controlled by adjusting the speed of the dehumidification fan to save energy. However, the speed of the dehumidification fan cannot be adjusted too low. If it is too low, the humidity in the drying oven will be too high, and the product will not be easy to dry, but more energy will be consumed. Therefore, according to the algorithm, the speed of the dehumidification fan can be controlled within a reasonable range.

[0101] Without applying the control method of the industrial production drying system, the average daily cumulative steam consumption was 49.20 tons / day; after applying the control method of the industrial production drying system, the average daily cumulative steam consumption was 37.97 tons / day, and the energy saving efficiency was 22.8%.

[0102] It can be seen that the control method of the industrial production drying system can reduce energy consumption and increase revenue.

Claims

1. A control method for an industrial production drying system, characterized in that: Applied to industrial production drying system, the industrial production drying system comprises: The main body (1) is provided with a circulation fan assembly, a dehumidification fan assembly and a heating assembly; A first moisture content sensor (2) is arranged at the inlet of the main body (1) and is suitable for detecting the moisture content of the product to be introduced into the main body (1); A first temperature sensor (3) is disposed in the midstream section of the main body (1) and is suitable for detecting the temperature of the air in the midstream section of the main body (1); A first humidity sensor (4), arranged in the midstream section of the main body (1), suitable for detecting the humidity of the air in the midstream section of the main body (1); A second humidity sensor (7), arranged in the downstream section of the main body (1), suitable for detecting the humidity of the air in the downstream section of the main body (1); A second temperature sensor (8), disposed in the downstream section of the main body (1), suitable for detecting the temperature of the air in the downstream section of the main body (1); The control method of the industrial production drying system comprises: S1. Determine the amount of water evaporation required in the product according to the moisture content of the product detected by the first moisture content sensor (2), and calculate the amount of heat required to be provided according to the moisture evaporation and the moisture-heat balance equation; S2. Determine the process parameters of the drying process according to the heat calculated in step S1, thereby setting parameters for the circulation fan component, the dehumidification fan component and the heating component; S3. Verify whether the set parameters are accurate based on the detection values ​​of the first temperature sensor (3) and the first humidity sensor (4), the detection values ​​of the second temperature sensor (7) and the second humidity sensor (8), determine whether the product is under-baked or over-baked, and feedback-adjust the set parameters of the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; Wherein, the first temperature sensor (3) and the second temperature sensor (8) are both based on infrared temperature online detection equipment.

2. The control method of the industrial production drying system according to claim 1, characterized in that: The industrial production drying system also includes: A second moisture content sensor (5) is disposed at the outlet of the main body (1) and is suitable for detecting the moisture content of the product output from the main body (1); A gram weight sensor (6) is arranged at the outlet of the main body (1) and is suitable for detecting the gram weight of the product output from the main body (1).

3. The control method of the industrial production drying system according to claim 2, characterized in that: The industrial production drying system also includes: The control processor is adapted to receive the detection signal of the first moisture content sensor (2) and determine the process parameters in the drying process according to the moisture-heat balance equation; the control processor is also adapted to receive the detection signal of the first temperature sensor (3) and the detection signal of the first humidity sensor (4), and feedback-adjust the circulation fan assembly, the dehumidification fan assembly and the heating assembly to meet the process parameter requirements; the control processor is also adapted to receive the detection signal of the second moisture content sensor (5) and the detection signal of the gram weight sensor (6), and feedback-modify the moisture-heat balance equation until the product properties meet the requirements.

4. The control method of the industrial production drying system according to any one of claims 1 to 3, characterized in that: The industrial production drying system also includes: A third humidity sensor (9), arranged at the upstream section of the main body (1), suitable for detecting the humidity of the air in the upstream section of the main body (1); The third temperature sensor (10) is arranged in the upstream section of the main body (1) and is suitable for detecting the temperature of the air in the upstream section of the main body (1).

5. The control method of the industrial production drying system according to any one of claims 1 to 3, characterized in that: The dehumidification fan assembly is provided with a particle detection sensor (11) suitable for detecting the concentration of smoke emitted by the main device.

6. The control method of the industrial production drying system according to claim 5, characterized in that: The control method of the industrial production drying system also includes: S4. Based on the detection value of the second moisture content sensor (5) and the detection value of the gram weight sensor (6), determine whether the physical properties of the product after drying meet the requirements; if not, immediately optimize the moisture-heat balance equation and redefine the process parameters until the product properties are met.

7. The control method of the industrial production drying system according to claim 6, characterized in that: Steps S1-S4 are all automatically operated by a control processor, the control processor receives the detection signal of the first moisture content sensor (2), and determines the process parameters in the drying process according to the moisture-heat balance equation; the control processor receives the detection signal of the first temperature sensor (3) and the detection signal of the first humidity sensor (4), the detection signal of the second temperature sensor (7) and the detection signal of the second humidity sensor (8), and feedback-adjusts the circulation fan component, the dehumidification fan component and the heating component to meet the process parameter requirements; The control processor receives the detection signal of the second moisture content sensor (5) and the detection signal of the gram weight sensor (6), and feeds back to modify the moisture-heat balance equation until the physical properties of the product meet the requirements.

8. The control method of the industrial production drying system according to claim 7, characterized in that: The control method of the industrial production drying system also includes: S5. Use the particle detection sensor (11) to detect the exhaust flue gas concentration at the outlet of the dehumidification fan component to generate a flue gas concentration detection value.

9. A drying device, characterized in that: A control method for an industrial production drying system using any one of claims 1 to 5.

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