Intelligent water adjusting system for banner of topcoat coating

Abstract

The invention provides an intelligent top-coat coating banner moisture adjusting system which comprises a top-coat coating machine, a top-coat gas infrared drying box, a first top-coat hot air box, a second top-coat hot air box, a third top-coat hot air box, a first drying cylinder, a second drying cylinder, a coating banner moisture detector and a winding machine which are sequentially distributed from front to back in the paper web moving direction. And the banner moisture control system is electrically connected with the surface coating gas infrared drying box, the first surface coating hot air box, the second surface coating hot air box, the third surface coating hot air box and the coating banner moisture detector. Through three innovations of refined zone control, quick response feedback and heat energy gradient utilization, a set of highly intelligent and energy-saving coating drying system is constructed, and the long-standing industrial pain points of non-uniform moisture of a banner, high drying energy consumption, adjustment response lag and the like in coated paper production are solved.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and more specifically to an intelligent moisture regulation system for a horizontal strip of topcoat. Background Technology

[0002] In the actual production process of coated paper, the coating is applied in three layers in sequence: pre-coating, intermediate coating, and top coating. The top coating, as the final layer, primarily focuses on finishing the paper surface, giving it finer optical properties and a more stable hue. The uniformity of moisture content across the top coating width has a significant impact on the final product quality. Excessive moisture content across the width leads to uneven distribution of shrinkage stress during drying, with high-moisture areas shrinking more after drying, easily forming "indentations" or "wavy edges," resulting in differences in transverse gloss. Localized excessive moisture may prevent the adhesive from fully curing, causing the coating to peel or shed powder; insufficient moisture makes the coating brittle, reducing folding endurance and flexibility. Furthermore, uneven moisture content affects pigment distribution and film density, leading to striped defects in whiteness, brightness, and color difference across the width, especially noticeable on high-gloss coated paper. In addition, uneven moisture content across the width causes uneven paper tension, which can easily lead to stress concentration at the wet-dry interface during high-speed operation, causing paper breaks or wrinkles.

[0003] In the existing technology, there are many techniques for adjusting the overall width moisture content of paper. For example, Chinese Patent Publication No. CN112763573A discloses a method and system for compensating for width curve interference based on a paper detection scanning device. After multiple rounds of back-and-forth detection of the sample to be tested, multiple width curves are obtained. After corresponding calculations, a compensation curve is obtained. The compensation curve is used to directly compensate for the increase or decrease of the measured curve without adding any other devices. The detection process is entirely based on the original equipment, resulting in lower costs. The calculation process is simple, and environmental factors and device performance are directly reflected in the compensation curve. It can not only compensate for horizontal changes in the detection window above or below the detection device, but also compensate well even if the upper and lower sensor base plates are not parallel. Only one compensation is needed to simultaneously compensate for the required physical quantities such as basis weight, moisture, ash content, and non-contact thickness on the QCS, and achieve good results. However, the above method not only requires complex calculations and powerful software, but also has a slow system response. Moreover, it can only control the width moisture content of paper and cannot detect and adjust the width moisture content of coated paper. There is also no relevant technology specifically for "adjusting the width moisture content of coated paper" in the existing technology. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes an intelligent moisture regulation system for the horizontal strip of coated paper, which solves long-standing problems in coated paper production such as uneven moisture content, high drying energy consumption, and delayed regulation response.

[0005] To achieve the above technical solution, this invention provides an intelligent moisture regulation system for the horizontal strip of the topcoat, comprising: a topcoat coating machine, a topcoat gas-fired infrared drying chamber, a first topcoat hot air box, a second topcoat hot air box, a third topcoat hot air box, a first drying cylinder, a second drying cylinder, a horizontal strip moisture detector, a winding machine, and a horizontal strip moisture control system, arranged sequentially from front to back along the paper web movement direction. The horizontal strip moisture control system is electrically connected to the topcoat gas-fired infrared drying chamber, the first topcoat hot air box, the second topcoat hot air box, the third topcoat hot air box, and the horizontal strip moisture detector. The topcoat gas-fired infrared drying chamber adopts a four-module adjustable structure. The first two rows of gas-fired infrared modules in the topcoat gas-fired infrared drying chamber are normal power modules, while each gas-fired infrared generator in the last two rows of gas-fired infrared modules can be individually switched on / off and its power output can be adjusted. The horizontal strip moisture control system uses the moisture data of the horizontal strip detected by the horizontal strip moisture detector to control the power output of individual gas-fired infrared generators in the last two rows of gas-fired infrared modules to achieve intelligent regulation of the moisture content of the horizontal strip.

[0006] Preferably, the intelligent moisture regulation system for the horizontal coating layer operates using the following method: S1. Topcoat: The topcoat coating is evenly applied to the surface of the paper web using a topcoat coating machine; S2. Surface coating drying: The paper web after surface coating is sequentially sent into the surface coating gas infrared drying box, No. 1 surface coating hot air box, No. 2 surface coating hot air box, No. 3 surface coating hot air box, No. 1 drying cylinder, and No. 2 drying cylinder. S3. Topcoat Banner Moisture Detection: The moisture content of the topcoat banner is detected by a banner moisture detector, and the data is transmitted to the banner moisture control system. S4. Banner Moisture Control: The banner moisture control system determines whether the difference in banner moisture content of the top coating layer needs adjustment. If the difference in banner moisture content of the top coating layer is less than the set threshold, no adjustment is needed. If the difference in banner moisture content of the top coating layer is greater than the set threshold, the output power of the gas infrared generator corresponding to the drying area of ​​the two rows of intermediate coating layers in the top coating gas infrared drying box is adjusted by the banner moisture control system to adjust the drying of the paper web in that drying area. S5. Closed-loop feedback and adaptive optimization: The system continuously monitors the effect of the adjustment. If the banner moisture adjustment exceeds the system range, the system will automatically alarm and generate an error report.

[0007] Preferably, each gas infrared module of the surface coating gas infrared drying oven is equipped with N gas infrared generators arranged horizontally at intervals. The N gas infrared generators in the last two rows of gas infrared modules can be individually switched on / off and their power output can be adjusted. The coating banner moisture detector is equipped with N detection areas when detecting the moisture content of the paper banner. The N detection areas correspond one-to-one with the drying areas of the N gas infrared generators. Once an abnormality in the moisture content of a certain detection area is detected, the banner moisture control system quickly adjusts the gas infrared generator corresponding to that detection area to rapidly adjust its output power.

[0008] Preferably, in step S1, the topcoat coating is composed of the following components by weight: 10-20 parts of kaolin, 5-15 parts of heavy calcium carbonate, 70-80 parts of light calcium carbonate, 13-15 parts of latex, and 1-2 parts of other additives; the solid content is controlled at 68%±0.5%; the viscosity is 350±50 CPS; the pH is 9.0±0.2; the coating temperature is 30±5 ℃; and the coating amount is 14±2 gsm.

[0009] Preferably, in step S1, the topcoat coating is composed of the following components by weight: 15 parts kaolin, 10 parts heavy calcium carbonate, 75 parts light calcium carbonate, 13.5 parts latex, and 1.3 parts other additives, wherein the other additives are: 0.1 parts defoamer, 0.2 parts water-resistant agent, 0.2 parts bactericide, 0.1 parts lubricant, 0.3 parts dispersant, and 0.4 parts carboxymethyl cellulose.

[0010] Preferably, in step S2, the gas infrared output power of the surface coating gas infrared drying oven is controlled between 14 mbar and 22 mbar, the temperature of the No. 1 surface coating hot air box is controlled between 110 and 150°C, the temperature of the No. 2 surface coating hot air box is controlled between 120 and 160°C, the temperature of the No. 3 surface coating hot air box is controlled between 130 and 170°C, the temperature of the No. 1 drying cylinder is controlled between 40 and 70°C, and the temperature of the No. 2 drying cylinder is controlled between 35 and 60°C.

[0011] Preferably, in step S2, the gas infrared output power of the surface coating gas infrared drying oven is controlled between 16mbar and 20mbar, the temperature of the No. 1 surface coating hot air box is controlled at 120℃, the temperature of the No. 2 surface coating hot air box is controlled at 130℃, the temperature of the No. 3 surface coating hot air box is controlled at 150℃, the temperature of the No. 1 drying cylinder is controlled at 60℃, and the temperature of the No. 2 drying cylinder is controlled at 40℃.

[0012] Preferably, if the exhaust gas temperature of the surface coating gas infrared drying box exceeds 90°C, it is directly recycled to the inlet of the No. 1 surface coating hot air box, and after being mixed evenly with the No. 1 surface coating hot air box, the paper web is dried.

[0013] The beneficial effects of the intelligent moisture regulation system for horizontal coating provided by this invention are as follows: (1) This invention constructs a highly intelligent and energy-saving coating drying system through three major innovations: refined zone control, rapid response feedback, and cascade utilization of thermal energy. This invention transforms the traditional extensive "uniform" drying into a precise operation mode that performs real-time closed-loop adjustment of the moisture content of "every point in the horizontal direction", solving the long-standing industry pain points in coated paper production, such as uneven moisture content across the horizontal direction, high drying energy consumption, and delayed adjustment response.

[0014] (2) This invention overcomes the problem of uneven moisture distribution in the horizontal banner (such as dry on both sides and wet in the middle) caused by traditional drying. This system can accurately implement targeted and enhanced drying of the detected high-moisture areas through the two independently controllable gas infrared generators in the last row, which fundamentally ensures the absolute uniformity of moisture distribution in the coated horizontal banner and significantly improves key indicators such as the smoothness and printability of the paper.

[0015] (3) The present invention can realize on-demand heating, only increasing the power in the area that needs to be adjusted, avoiding energy waste caused by overall dryness. Moreover, it can also realize exhaust gas heat energy recovery, recovering the exhaust gas of the gas infrared box exceeding 90°C to the hot air box inlet for reuse, which greatly reduces the heating energy consumption of fresh air and forms an efficient heat energy cascade utilization cycle.

[0016] (4) This invention combines the closed-loop feedback concept in the field of process control with special drying equipment (zoned controllable gas infrared) and applies it to the coating drying scenario, resulting in a significant technical synergy effect. Through the independent power adjustment of the last two rows of gas infrared modules (each generator can be switched on / off / adjusted individually), millimeter-level transverse drying precision control is achieved. The coating width strip moisture detector divides the paper strip into N detection areas, which correspond one-to-one with N infrared generators to form a "detection-judgment-adjustment" millisecond-level response closed loop. Actual measurements show that the width strip moisture CV value (coefficient of variation) can be controlled at ≤1.2%, which is better than the industry standard (usually 1.5%~2.5%). Attached Figure Description

[0017] Figure 1 This is a flowchart of the present invention.

[0018] Figure 2 This is a diagram showing the layout of the process equipment for this invention.

[0019] In the diagram: 1. Topcoat coating machine; 2. Topcoat gas-fired infrared drying oven; 21. Gas-fired infrared generator; 3. Topcoat hot air box No. 1; 4. Topcoat hot air box No. 2; 5. Topcoat hot air box No. 3; 6. Drying cylinder No. 1; 7. Drying cylinder No. 2; 8. Coating horizontal strip moisture detector; 9. Horizontal strip moisture control system; 10. Winding machine. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0021] Example 1: A smart moisture regulation system for a horizontal coating.

[0022] Reference Figure 1 and Figure 2 As shown, a system for intelligently adjusting the moisture content of the topcoat on the horizontal axis of the paper web includes: a topcoat coating machine 1, a topcoat gas-fired infrared drying chamber 2, a first topcoat hot air chamber 3, a second topcoat hot air chamber 4, a third topcoat hot air chamber 5, a first drying cylinder 6, a second drying cylinder 7, a coating horizontal axis moisture detector 8, a winding machine 10, and a horizontal axis moisture control system 9, which is connected to the topcoat gas-fired infrared drying chamber 2, the first topcoat hot air chamber 3, the second topcoat hot air chamber 4, the third topcoat hot air chamber 5, the coating horizontal axis moisture detector 8, the winding machine 10, and the horizontal axis moisture control system 9. The horizontal band moisture detector 8 is electrically connected. The surface coating gas-fired infrared drying chamber 2 adopts a four-module area adjustable structure. The first two rows of gas-fired infrared modules in the surface coating gas-fired infrared drying chamber 2 are normal power modules, while each gas-fired infrared generator 21 in the last two rows of gas-fired infrared modules can be individually switched on / off and its power output can be adjusted. The horizontal band moisture control system 9 uses the horizontal band moisture data detected by the surface coating horizontal band moisture detector 8 to control the power output of individual gas-fired infrared generators 21 in the last two rows of gas-fired infrared modules to achieve intelligent adjustment of the horizontal band moisture. Each gas-fired infrared module in the surface coating gas-fired infrared drying chamber 2 has N gas-fired infrared generators 21 installed horizontally at intervals. Each of the N gas-fired infrared generators 21 in the last two rows of gas-fired infrared modules can be individually switched on / off and its power output can be adjusted. When detecting the horizontal band moisture of the paper, the surface coating horizontal band moisture detector 8 is set with N detection areas. The N detection areas correspond one-to-one with the drying areas of the N gas-fired infrared generators 21. Once an abnormality in the moisture of a certain detection area is detected, the horizontal band moisture control system quickly adjusts the gas-fired infrared generator 21 corresponding to that detection area to quickly adjust its output power.

[0023] This invention combines the closed-loop feedback concept from the field of process control with special drying equipment (zoned controllable gas infrared), applying it to coating drying scenarios and generating significant technological synergy. Through independent power adjustment of the last two rows of gas infrared modules (each generator can be individually switched on / off / adjusted), millimeter-level transverse drying precision control is achieved. The coating width strip moisture detector divides the paper web into N detection zones, each corresponding to one of the N infrared generators, forming a millisecond-level response closed loop of "detection-judgment-adjustment." Actual measurements show that the width strip moisture CV value (coefficient of variation) can be controlled to ≤1.2%, superior to the industry standard (typically 1.5%~2.5%).

[0024] The intelligent moisture regulation system for the horizontal coating of the topcoat provided by this invention operates using the following method: S1. Topcoat: The topcoat coating is evenly applied to the surface of the paper web using a topcoat coating machine. The topcoat coating is composed of the following components by weight: 15 parts kaolin, 10 parts heavy calcium carbonate, 75 parts light calcium carbonate, 13.5 parts latex, and 1.3 parts other additives, including: 0.1 parts defoamer, 0.2 parts water-resistant agent, 0.2 parts bactericide, 0.1 parts lubricant, 0.3 parts dispersant, and 0.4 parts carboxymethyl cellulose. The solid content is controlled at 68%±0.5; the viscosity is 350±50 CPS; the pH is 9.0±0.2; the coating temperature is 30±5 ℃; and the coating amount is 14±2 gsm. This invention provides a topcoat formulation specifically for this system, with 75 parts of lightweight calcium carbonate as the main filler, balancing whiteness, smoothness, and water retention. The latex content is precisely controlled at 13.5 parts to ensure a balance between film strength and flexibility. The solid content is 68%±0.5%, and the viscosity is 350±50 CPS, matching the stability of high-speed / dossard coating. Additives such as CMC and dispersants are added to suppress lateral rheological differences and reduce the risk of uneven moisture distribution from the source.

[0025] S2. Surface Coating Drying: The surface-coated paper web is sequentially fed into the surface coating gas-fired infrared drying chamber, the No. 1 surface coating hot air chamber, the No. 2 surface coating hot air chamber, the No. 3 surface coating hot air chamber, the No. 1 drying cylinder, and the No. 2 drying cylinder. The gas infrared output power of the surface coating gas-fired infrared drying chamber is controlled between 16mbar and 20mbar. The temperature of the No. 1 surface coating hot air chamber is controlled at 120℃, the No. 2 surface coating hot air chamber at 130℃, the No. 3 surface coating hot air chamber at 150℃, the No. 1 drying cylinder at 60℃, and the No. 2 drying cylinder at 40℃. If the exhaust gas temperature of the surface coating gas-fired infrared drying chamber exceeds 90℃, it is directly recycled to the inlet of the No. 1 surface coating hot air chamber. After being mixed evenly with the No. 1 surface coating hot air chamber, the paper web is dried, which significantly reduces the heating energy consumption of fresh air and forms a highly efficient thermal energy cascade utilization cycle.

[0026] The last two rows of gas infrared modules in the surface coating infrared drying oven contain N independent infrared generators in each row, with a lateral resolution of 5–10 cm (depending on the N value), which is much higher than that of traditional hot air partitions (usually 30–50 cm). S3. Topcoat Banner Moisture Detection: The moisture content of the topcoat banner is detected by a topcoat banner moisture detector, and the data is transmitted to the banner moisture control system. The topcoat banner moisture detector has N detection areas when detecting the moisture content of the paper banner. A one-to-one mapping relationship is established between the N detection areas of the topcoat banner moisture detector and the N independent generators of the infrared drying oven, so as to achieve point-to-point precise intervention of "adjusting where it is wet", rather than the traditional area average adjustment. This "sensing-execution isomorphism" design is the first application in the coating drying field.

[0027] S4. Banner Moisture Control: The banner moisture control system determines whether the difference in moisture content of the topcoat layer needs adjustment. If the difference in moisture content is less than the set threshold, no adjustment is needed. If the difference in moisture content is greater than the set threshold, the system adjusts the output power of the gas infrared generators in the two rows of intermediate coating layers in the topcoat gas infrared drying chamber to adjust the drying of the paper in that area. By setting a threshold judgment mechanism, adjustment is only initiated when the moisture difference exceeds the limit, avoiding excessive intervention.

[0028] S5. Closed-loop feedback and adaptive optimization: The system continuously monitors the effect of adjustments. If the banner moisture content adjustment exceeds the system's range, the system automatically alarms and generates an error report. In actual production, if the adjustment exceeds the capacity range (e.g., severe local water accumulation), the system automatically alarms and generates an error report to prevent batch production of defective products.

[0029] Existing technologies mostly use gas-fired infrared for initial rapid drying, while this invention innovatively arranges highly responsive infrared generators in the middle and later stages of drying (the last two rows) to fine-tune the difference in residual moisture across the horizontal beam. Utilizing the instantaneous start and stop characteristics of infrared and the absence of thermal inertia, it achieves more sensitive local compensation than hot air, solving the problem of "adjustment ambiguity" caused by the slow response and heat diffusion of hot air systems.

[0030] This invention constructs a highly intelligent and energy-saving coating drying system through three major innovations: refined zone control, rapid response feedback, and cascaded utilization of thermal energy. This invention elevates the traditional, extensive "overall uniformity" drying method to a precise operation mode that performs real-time closed-loop adjustment of moisture at "every point in the horizontal direction," solving long-standing industry pain points in coated paper production such as uneven moisture content across the horizontal direction, high drying energy consumption, and sluggish adjustment response.

[0031] This invention combines gas-fired infrared (high heat flux density) + multi-stage hot air (penetrating drying) + low-temperature drying cylinder (shaping) into a gradient drying chain. It innovatively introduces a recovery path where high-temperature exhaust gas is directly connected to the hot air inlet, eliminating the need for additional heat exchangers. This results in a simple structure and high thermal efficiency, breaking through the energy waste model of traditional "infrared / hot air independent operation, waste heat disposal." This invention can achieve on-demand heating, increasing power only in areas requiring adjustment, avoiding energy waste caused by overall over-drying. Furthermore, it can achieve exhaust gas heat recovery, recovering the exhaust gas exceeding 90°C from the gas-fired infrared chamber to the hot air chamber inlet for reuse, significantly reducing the energy consumption for heating fresh air and forming a highly efficient cascade utilization cycle of thermal energy.

[0032] This invention overcomes the problem of uneven moisture distribution on the banner (e.g., dry on both sides, wet in the middle) caused by traditional drying methods. This system, through two independently controllable gas-fired infrared generators in the rear two rows, can precisely target and intensify drying in areas with high moisture content, fundamentally ensuring absolute uniformity of moisture content on the coated banner and significantly improving key indicators such as paper smoothness and printability.

[0033] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in the embodiments and drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A facecoat coating web moisture intelligent conditioning system characterized by The application relates to a surface-coating coating-layer cross-width moisture intelligent adjustment system. The surface-coating coating-layer cross-width moisture intelligent adjustment system comprises a surface-coating coating machine, a surface-coating gas infrared drying box, a first surface-coating hot air box, a second surface-coating hot air box, a third surface-coating hot air box, a first drying cylinder, a second drying cylinder, a coating-layer cross-width moisture detector and a cross-width moisture control system.

2. The facecoat coating web moisture intelligent conditioning system of claim 1, wherein, The surface-coating coating-layer cross-width moisture intelligent adjustment system adopts the following method for operation: S1, surface-coating: uniformly coating surface-coating paint on a paper web surface through the surface-coating coating machine; S2, surface-coating drying: sequentially feeding the paper web after surface-coating into the surface-coating gas infrared drying box, the first surface-coating hot air box, the second surface-coating hot air box, the third surface-coating hot air box, the first drying cylinder and the second drying cylinder; S3, surface-coating coating-layer cross-width moisture detection: detecting the surface-coating coating-layer cross-width moisture through the coating-layer cross-width moisture detector and transmitting data to the cross-width moisture control system; S4, cross-width moisture control: the cross-width moisture control system judges whether the surface-coating coating-layer cross-width moisture difference needs to be adjusted, if the surface-coating coating-layer cross-width moisture difference value is less than a set threshold value, no adjustment is needed; if the surface-coating coating-layer cross-width moisture difference value is greater than the set threshold value, the output power of the gas infrared generator in the corresponding drying area of the rear two rows of the surface-coating gas infrared drying box is adjusted through the cross-width moisture control system, and the paper web in the drying area is dried and adjusted; S5, closed-loop feedback and self-adaptive optimization: the system continuously monitors the effect after adjustment, if the cross-width moisture adjustment exceeds the system range, the system automatically alarms and generates an error report.

3. The facecoat coating web moisture intelligent conditioning system of claim 1, wherein, Each gas infrared module of the surface-coating gas infrared drying box is provided with N gas infrared generators in a transverse and side-by-side interval, the N gas infrared generators of the rear two rows of gas infrared modules can be individually switched on and off and the power output can be adjusted; the coating-layer cross-width moisture detector is provided with N detection areas when detecting the cross-width moisture of paper, the N detection areas and the drying areas of the N gas infrared generators one-to-one correspond, once the moisture of a certain detection area is detected to be abnormal, the corresponding gas infrared generator of the detection area is quickly adjusted through the cross-width moisture control system, and the output power is quickly adjusted.

4. The finish coat crossweb moisture intelligent conditioning system of claim 2, wherein, The step S1, the finishing coating composition by mass fraction: porcelain clay 10-20 parts, heavy calcium carbonate 5-15 parts, light calcium carbonate 70-80 parts, latex 13-15 parts, other additives 1-2 parts, control solid content of 68%±0.5; Viscosity is 350±50 CPS; PH is 9.0±0.2; Coating temperature is 30±5 ℃, coating weight is 14±2gsm.

5. The finish coat crossweb moisture intelligent conditioning system of claim 4, wherein, The step S1, the finishing coating composition by mass fraction: porcelain clay 15 parts, heavy calcium carbonate 10 parts, light calcium carbonate 75 parts, latex 13.5 parts, other additives 1.3 parts, wherein, other additives are: defoamer 0.1 parts, water repellent 0.2 parts, fungicide 0.2 parts, lubricant 0.1 parts, dispersant 0.3 parts, carboxymethyl cellulose 0.4 parts.

6. The finish coat crossweb moisture intelligent conditioning system of claim 2, wherein, The step S2, the finishing gas infrared drying oven of the finishing gas infrared output power control is between 14mbar-22mbar, the temperature of the first finishing hot air box control is 110-150℃, the temperature of the second finishing hot air box control is 120-160℃, the temperature of the third finishing hot air box control is 130-170℃, the temperature of the first drying cylinder control is 40-70℃, the temperature of the second drying cylinder control is 35-60℃.

7. The finish coat crossweb moisture intelligent conditioning system of claim 6, wherein, The step S2, the finishing gas infrared drying oven of the finishing gas infrared output power control is between 16mbar-20mbar, the temperature of the first finishing hot air box control is 120℃, the temperature of the second finishing hot air box control is 130℃, the temperature of the third finishing hot air box control is 150℃, the temperature of the first drying cylinder control is 60℃, the temperature of the second drying cylinder control is 40℃.

8. The finish coat crossweb moisture intelligent conditioning system of claim 6, wherein, The tail gas temperature of the finishing gas infrared drying oven if more than 90℃, directly recycled to the inlet of the first finishing hot air box, and the paper web is dried after mixing evenly with the first finishing hot air box.

Images