A dynamic drying device and method for tipping paper dot matrix

Abstract

The application discloses a kind of water-soluble pulp dot array dynamic drying device and method, it is related to water-soluble pulp production technical field.The present application mainly includes dryer, exhaust pipe, first shunt branch pipe, second shunt branch pipe, humidity treatment pipe, gas collecting tank, hot air return pipe, backflow branch pipe, injection branch pipe and the like structure.The present application is injected by external injection pipe external dry air flow, according to the moving direction of water-soluble pulp and carries out step-by-step temperature rising type horizontal air flow drying, and heated dry air flow is discharged through exhaust pipe, and carries out humidity detection, and the hot air flow that meets the drying requirement is introduced into gas collecting tank, and carries out secondary temperature detection, according to the air flow reference temperature required by each drying air flow guide groove, carries out the highest standard hot air flow recycling, to improve the drying efficiency of water-soluble pulp, also guarantee the drying forming quality of water-soluble pulp, also relatively efficient recycling of dry heat energy lost.

Description

Technical Field

[0001] This invention relates to the field of cork paper production technology, and in particular to a dot matrix dynamic drying device and method for cork paper. Background Technology

[0002] Tipping paper is a type of paper made primarily from cellulose, with the fiber raw materials mainly derived from tree species such as fir, pine, and bamboo. Tipping paper is characterized by its fine and soft texture, uniform flexibility, good air permeability, strong water absorption, and high durability. Due to its excellent mechanical properties, tipping paper is widely used in various fields such as construction, handicrafts, books, albums, tobacco, and cosmetics.

[0003] The processing flow of cork paper mainly includes several steps such as raw material processing, forming, drying, molding, and quality inspection. Among them, drying after the raw material is formed is one of the core links in the processing flow. It is necessary to strictly control the drying parameters and corresponding drying processes to ensure the quality and stability of the finished product.

[0004] Existing drying equipment directly feeds the tipping paper into the drying unit, which then sets a drying temperature for drying. However, when the tipping paper first enters the drying zone, its moisture content is high. The high temperature environment causes the moisture to evaporate too quickly and in large quantities, resulting in a "rough" texture after the tipping paper is dried and formed. Furthermore, existing drying methods result in significant heat energy loss, which increases production costs for companies. Therefore, improving the drying efficiency and quality control of tipping paper, as well as more efficiently utilizing the heat energy lost during drying, have become key issues that need to be addressed in the tipping paper production process. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dot matrix dynamic drying device and method for cork paper, which not only improves the drying efficiency of cork paper and ensures the drying and forming quality of cork paper, but also efficiently recycles the heat energy lost during drying.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention provides a dot-matrix dynamic drying device for cork paper. The cork paper is conveyed at a constant speed by a conveyor mechanism. Along the path of the cork paper, a dryer is positioned facing the surface of the cork paper. Each dryer has multiple parallel drying airflow guide channels, and each guide channel contains multiple heating rods. Based on the direction of the cork paper's movement: the heating power of the heating rods in the downstream drying airflow guide channel is greater than that in the upstream drying airflow guide channel. Within the same drying airflow guide channel: the heating power of the heating rods in the middle position is less than that of the heating rods on either side.

[0008] The dryer includes injection chambers located at both ends of the drying airflow guide channel. Each injection chamber has an air guide port on the side facing the drying airflow guide channel. An injection jack pipe communicating with the injection chamber is also located at the side end of the dryer. Each injection jack pipe is connected to an external injection pipe, which is equipped with a first flow rate sensor and a first valve. An exhaust pipe communicating with the drying airflow guide channel is located in the middle of the dryer. Each exhaust pipe is connected to an exhaust connecting pipe, which is equipped with a humidity sensor. The downstream end of the humidity sensor on the exhaust connecting pipe is connected to a first branch pipe and a second branch pipe via a tee. Each of the first and second branch pipes is independently equipped with a second valve.

[0009] All first branch pipes are connected to a common moisture treatment pipe, which is equipped with a first air pump located downstream of all first branch pipes. All second branch pipes are connected to a common gas collection tank, downstream of which is a hot gas return pipe. The hot gas return pipe is equipped with a second air pump, a temperature sensor, and a second flow rate sensor in sequence. The downstream end of the hot gas return pipe is connected to two return branch pipes via a tee. Each injection chamber of the dryer is connected to an injection branch pipe on its horizontal side, and the injection branch pipe is equipped with a third valve. All injection branch pipes on one side of the dryer are connected to one of the return branch pipes, and all injection branch pipes on the other side of the dryer are connected to the other return branch pipe.

[0010] As a preferred technical solution of the drying device of the present invention, the distribution direction of the drying airflow guide groove is perpendicular to the movement direction of the cork paper.

[0011] As a preferred technical solution of the drying device of the present invention: the dryer is provided with a plurality of parallel horizontal partitions, adjacent drying airflow guide channels are separated by the horizontal partitions, there is a 2-5mm gap between the lower end of the horizontal partition and the surface of the cork paper, and there is a 2-5mm gap between the lower end of the heating rod and the surface of the cork paper.

[0012] As a preferred technical solution of the drying device of the present invention: the range of the horizontal distribution of multiple heating rods in the drying airflow guide groove is matched with the horizontal width of the cork paper.

[0013] As a preferred technical solution of the drying device of the present invention, the airflow rate in each drying airflow guide channel is the same.

[0014] As a preferred technical solution of the drying device of the present invention: with the forward direction of the cork paper as the reference, the airflow rate in the upstream drying airflow guide channel is greater than the airflow rate in the downstream drying airflow guide channel.

[0015] This invention provides a control method for a dot-matrix dynamic drying device for cork paper, comprising the following:

[0016] S1. The tipping paper advances uniformly through the conveying mechanism. The first valves of all external air injection pipes are opened, and airflows enter the drying air guide grooves from the external air injection pipes, air injection top pipes, and injection cavities. The heating rods in each drying air guide groove start initial heating according to the heating power preset by the system.

[0017] S2. The first air pump on the moisture treatment pipe and the second air pump on the hot air flow return pipe start to work. The airflows in each drying air guide groove enter the exhaust connecting pipe through the discharge pipes. The humidity sensors on each exhaust connecting pipe detect the humidity of the airflows in the exhaust connecting pipes:

[0018] If the air humidity W x is not lower than the reference humidity W b preset by the system, the second valve of the first shunt branch pipe connected to the exhaust connecting pipe is opened, and the second valve of the second shunt branch pipe connected is closed. The humid airflows enter the first shunt branch pipe and then enter the moisture treatment pipe.

[0019] If the air humidity W x is lower than the reference humidity W b preset by the system, the second valve of the second shunt branch pipe connected to the exhaust connecting pipe is opened, and the second valve of the first shunt branch pipe connected is closed. The hot airflows with qualified humidity enter the second shunt branch pipe and then enter the air collection tank.

[0020] S3. The hot airflows with qualified humidity entering the air collection tank enter the hot air flow return pipe. The temperature sensor detects the temperature of the airflows, denoted as T x and the second flow rate sensor of the hot air flow return pipe senses and detects the flow rate of the airflows, denoted as V x .

[0021] Among them, based on the advancing direction of the tipping paper: The reference drying air temperatures required for each drying air guide groove preset by the system are {T1, T2, T3,..., T n}}, and the reference air flow rates required for each drying air guide groove preset by the system are {V1, V2, V3,..., V n}.

[0022] The system analyzes the magnitude relationship between the air temperature T x and each drying air reference temperature of {T1, T2, T3,..., T n}, and analyzes T n , T s , T s+1 , T s ≤T x <T s+1 in {T1, T2, T3,..., T sThe third valve of the injection branch pipe connected to the drying airflow guide channel is opened, and the airflow enters the drying airflow guide channel that meets the temperature standard. The reference temperature of the drying airflow is analyzed to be T. s The reference airflow velocity V corresponding to the drying airflow guide groove s :

[0023] If the airflow velocity V x Not lower than the reference airflow velocity V s The reference temperature of the drying airflow is T. s The first valve of the external air injection pipe connected to the dry airflow guide channel is closed.

[0024] If the airflow velocity V x Below the reference airflow velocity V s The reference temperature of the drying airflow is T. s The first valve of the external air injection pipe connected to the dry airflow guide channel opens linearly, causing the airflow velocity detected by the first flow velocity sensor to be V. s -V x Meanwhile, the reference temperature of the drying airflow is T. s The power P of the heating rod in the drying airflow guide groove and the airflow velocity V injected through the external air injection pipe s -V x There exists a relationship: F(P) ∝ F(V) s -V x ).

[0025] Compared with existing technologies, the beneficial effects of this invention are:

[0026] This invention features multiple drying airflow channels in the dryer, each equipped with multiple heating rods. External drying airflow is injected through an external air injection pipe, and horizontal airflow drying is performed in a step-by-step heating manner according to the direction of the cork paper's movement. The heated and dried airflow is then discharged through an exhaust pipe, and humidity is detected. The hot airflow that meets the drying requirements is guided into a collection tank for secondary temperature detection. Based on the airflow reference temperature required for each drying airflow channel, the hot airflow is recycled to the highest standard. This not only improves the drying efficiency of the cork paper but also ensures the quality of the dried cork paper, while also efficiently recycling the heat energy lost during drying. Attached Figure Description

[0027] Figure 1 This is a top view schematic diagram of the dryer in this invention for airflow drying of cork paper.

[0028] Figure 2 This is a schematic diagram of the working structure when hot air is discharged from the dryer in this invention.

[0029] Figure 3This is a schematic diagram of the structure for guiding the qualified hot airflow back to the dryer in this invention.

[0030] Wherein: 1-Water-filled paper; 2-Dryer; 201-Drying airflow guide channel; 202-Injection chamber; 203-Air injection top pipe; 204-Air guide port; 205-External air injection pipe; 206-First flow rate sensor; 207-First valve; 208-Discharge pipe; 209-Heating rod; 210-Baffle plate; 3-Exhaust connecting pipe; 4-Humidity sensor; 5-First branch pipe; 6-Second branch pipe; 7-Second valve; 8-Moisture treatment pipe; 9-First air pump; 10-Gas collection tank; 11-Hot airflow return pipe; 12-Second air pump; 13-Temperature sensor; 14-Second flow rate sensor; 15-Return branch pipe; 16-Injection branch pipe; 17-Third valve. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] Example 1: This invention designs a dot-matrix dynamic drying device for cork paper, mainly including a dryer 2, an exhaust pipe 3, a first branch pipe 5, a second branch pipe 6, a moisture treatment pipe 8, a gas collection tank 10, a hot gas return pipe 11, a return branch pipe 15, and an injection branch pipe 16, etc., as detailed below:

[0033] Please see Figure 1 The cork paper moves forward at a constant speed via a conveyor mechanism. Along the way, a dryer 2 facing the surface of the cork paper is positioned. The dryer 2 has multiple parallel transverse partitions 210. Drying airflow guide channels 201 are formed between adjacent transverse partitions 210. The multiple drying airflow guide channels 201 are parallel to each other and are horizontally distributed, perpendicular to the direction of movement of the cork paper. A small gap, such as 2 to 5 mm, is left between the lower end of the transverse partition 210 and the surface of the cork paper.

[0034] Each drying airflow guide channel 201 is equipped with multiple heating rods 209. The range of the horizontal distribution of the multiple heating rods 209 in the drying airflow guide channel 201 is matched with the horizontal width of the tipping paper. A small gap, such as 2 to 5 mm, is left between the lower end of the heating rod 209 and the surface of the tipping paper.

[0035] Based on the direction of the water-cooled paper's movement: the heating power of the heating rod 209 in the downstream drying airflow guide trough 201 is higher, and the heating power of the heating rod 209 is lower as the upstream drying airflow guide trough 201 decreases. This is to prevent the drying temperature from suddenly becoming too high when the water-cooled paper first enters the drying zone, which could cause a sudden and large-scale evaporation of moisture from the paper, potentially damaging it and leading to rough paper forming. By gradually increasing the drying temperature linearly, the moisture in the water-cooled paper is evaporated linearly, minimizing damage to the paper during the drying and evaporation process.

[0036] In the same drying airflow guide channel 201: the heating power of the heating rod 209 in the middle position is less than that of the heating rods 209 on both sides. When the airflow just enters the drying airflow guide channel 201, the temperature of the drying airflow is insufficient and needs to be heated quickly. However, the heating rods 209 in the middle position only need to "keep the temperature" of the heated airflow.

[0037] The dryer is provided with an injection chamber 202, which is located at both ends of the drying airflow guide channel 201. The injection chamber 202 is provided with an air guide port 204 on the side facing the drying airflow guide channel 201. An air injection top pipe 203 is also provided on the side of the dryer 2, and the air injection top pipe 203 is connected to the injection chamber 202.

[0038] An external air injection pipe 205 is independently connected to an air injection top pipe 203. A first flow rate sensor 206 and a first valve 207 are configured on the external air injection pipe 205. An exhaust pipe 208 is set in the middle of the dryer 2, and the exhaust pipe 208 is connected to the drying airflow guide channel 201.

[0039] The airflow rates in each drying airflow guide trough 201 can be the same or different. When they are different, the airflow rate in the upstream drying airflow guide trough 201 is greater than that in the downstream drying airflow guide trough 201, based on the direction of the water-pressed paper's movement.

[0040] Please see Figure 2 An exhaust pipe 3 is independently connected to an exhaust pipe 208. The exhaust pipe 3 is equipped with a humidity sensor 4. Downstream of the humidity sensor 4, the exhaust pipe 3 is connected to a first branch pipe 5 and a second branch pipe 6 via a tee. A second valve 7 is installed on both the first and second branch pipes 5 and 6. The coordination between the exhaust pipe 3, the first branch pipe 5, the second branch pipe 6, and the second valves 7 is achieved through a tee-type control valve. Furthermore, all the second branch pipes 6 are connected to a common gas collection tank 10.

[0041] All the first branch pipes 5 are connected to a moisture treatment pipe 8, and a first air pump 9 is installed on the moisture treatment pipe 8. The first air pump 9 is located downstream of all the first branch pipes 5.

[0042] Please see Figure 2 , Figure 3 The hot gas return pipe 11 is connected to the outlet end downstream of the gas collection tank 10. The second air pump 12, temperature sensor 13 and second flow rate sensor 14 are installed sequentially on the hot gas return pipe 11.

[0043] Please see Figure 3 The downstream end of the hot gas return pipe 11 is connected to two return branch pipes 15 via a tee. There are multiple injection branch pipes 16, each of which is connected to the horizontal side end of each injection chamber 202 of the dryer 2. A third valve 17 is installed on the injection branch pipe 16.

[0044] All injection branch pipes 16 on one side of dryer 2 are connected to one of the return branch pipes 15, and all injection branch pipes 16 on the other side of dryer 2 are connected to another return branch pipe 15, for example... Figure 3 In the middle, all the injection branches 16 on the left side of the dryer 2 are connected to a return branch 15, and all the injection branches 16 on the right side of the dryer 2 are connected to another return branch 15.

[0045] Example 2: This invention designs a control method for a dot-matrix dynamic drying device for cork paper, including the following:

[0046] First, after the production line starts, the cork paper moves forward at a constant speed through the conveyor mechanism. The first valve 207 of all external air injection pipes 205 is opened, and the airflow enters the drying airflow guide channel 201 from the external air injection pipe 205, the air injection top pipe 203, and the injection chamber 202. The heating rods 209 in each drying airflow guide channel 201 begin to perform initial heating according to the system's preset heating power.

[0047] Then, the control of the hot and humid airflow is initiated:

[0048] The first air pump 9 on the moisture treatment pipe 8 and the second air pump 12 on the hot air return pipe 11 start working. The airflow in each dry airflow guide trough 201 enters the exhaust pipe 3 through the discharge pipe 208. The humidity sensor 4 on each exhaust pipe 3 detects the humidity of the airflow in the exhaust pipe 3.

[0049] Scenario 1: If the airflow humidity W x Not lower than the system's preset reference humidity (W) b Then, the second valve 7 of the first branch pipe 5 connected to the exhaust pipe 3 is opened, and the second valve 7 of the second branch pipe 6 connected to it is closed. The humid airflow enters the first branch pipe 5 and then enters the moisture treatment pipe 8. The moisture treatment pipe 8 guides the humid hot airflow into the water vapor separation device, which not only recovers the water source, but also allows the hot airflow to be reused.

[0050] Case 2: If the air flow humidity W x is lower than the reference humidity W preset by the system b , the second valve 7 of the second shunt branch pipe 6 connected to the exhaust connecting pipe 3 is opened, and the second valve 7 of the first shunt branch pipe 5 connected thereto is closed. The hot air with qualified humidity enters the second shunt branch pipe 6 and then enters the air collecting tank 10.

[0051] Then, the control of the recycling of the relatively dry hot air flow is carried out:

[0052] The hot air flow with qualified humidity entering the air collecting tank 10 enters the hot air flow return pipe 11. The temperature sensor 13 detects the air flow temperature, denoted as T x , and the second flow rate sensor 14 of the hot air flow return pipe 11 senses and detects the air flow rate, denoted as V x .

[0053] Among them, based on the forward direction of the tipping paper: the required reference temperatures of the drying air flows for each drying air flow guide groove 201 preset by the system are {T1, T2, T3,..., T n}, and the required reference air flow rates for each drying air flow guide groove 201 preset by the system are {V1, V2, V3,..., V n}.

[0054] The system analyzes the magnitude relationship between the air flow temperature T x and each drying air flow reference temperature of {T1, T2, T3,..., T n}, and analyzes T n and T s , T s+1 , T s ≤T x <T[[ID=XXX]] s+1 in {T1, T2, T3,..., T s )]. Then, the third valve 17 of the injection branch pipe 16 connected to the drying air flow guide groove 201 with the drying air flow reference temperature of T s is opened, and the third valves 17 of the other injection branch pipes 16 are closed. The air flow enters the drying air flow guide groove 201 that meets the temperature standard, and analyzes the reference air flow rate V s corresponding to the drying air flow guide groove 201 with the drying air flow reference temperature of T s , V n ∈{V1, V2, V3,..., V x}.

[0055] Case 1: If the air flow rate V x is not lower than the reference air flow rate V s , the first valve 207 of the external injection pipe 205 connected to the drying air flow guide groove 201 with the drying air flow reference temperature of T s

[0056] Scenario 2: If the airflow velocity V x Below the reference airflow velocity V s The reference temperature of the drying airflow is T. s The first valve 207 of the external air injection pipe 205 connected to the dry airflow guide channel 201 is linearly opened, so that the airflow velocity detected by the first flow velocity sensor 206 is V. s -V x Meanwhile, the reference temperature of the drying airflow is T. s The power P of the heating rod in the drying airflow guide trough 201 and the airflow velocity V injected through the external air injection pipe 205 are related. s -V x There exists a relationship: F(P) ∝ F(V) s -V x In other words, the greater the flow rate of the external air injected into the external air injection pipe 205, the greater the power of the heating rod 209.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic drying device for tipping paper dot matrix, the tipping paper is uniformly advanced by a conveying mechanism, and a dryer (2) is arranged on the way of the uniformly advanced tipping paper and faces the surface of the tipping paper, characterized in that: the dryer (2) is provided with a plurality of parallel drying air flow guide grooves (201), and each drying air flow guide groove (201) is provided with a plurality of heating rods (209); in the direction of the advancement of the tipping paper: the heating power of the heating rods (209) in the downstream drying air flow guide groove (201) is greater than that of the heating rods (209) in the upstream drying air flow guide groove (201); in the same drying air flow guide groove (201): the heating power of the heating rod (209) at the middle position is less than that of the heating rods (209) at the two sides; the dryer (2) comprises injection cavities (202) at the two side ends of the drying air flow guide grooves (201), the injection cavities (202) are provided with air guide ports (204) facing one side of the drying air flow guide grooves (201), and the side ends of the dryer (2) are further provided with injection air top pipes (203) in communication with the injection cavities (202), each injection air top pipe (203) is connected with an external injection air pipe (205), the external injection air pipe (205) is provided with a first flow rate sensor (206) and a first valve (207), and the middle position of the dryer (2) is provided with exhaust pipes (208) in communication with the drying air flow guide grooves (201); each exhaust pipe (208) is connected with an exhaust connecting pipe (3), the exhaust connecting pipe (3) is provided with a humidity sensor (4), the downstream end of the humidity sensor (4) of the exhaust connecting pipe (3) is connected with a first shunt branch pipe (5) and a second shunt branch pipe (6) through a tee joint, and the first shunt branch pipe (5) and the second shunt branch pipe (6) are independently provided with second valves (7) respectively; all the first shunt branch pipes (5) are jointly connected with a moisture treatment pipe (8), and the moisture treatment pipe (8) is provided with a first air pump (9) at the downstream side of all the first shunt branch pipes (5); all the second shunt branch pipes (6) are jointly connected with a gas collecting tank (10), the downstream of the gas collecting tank (10) is connected with a hot air flow return pipe (11), the hot air flow return pipe (11) is sequentially provided with a second air pump (12), a temperature sensor (13) and a second flow rate sensor (14), and the downstream end of the hot air flow return pipe (11) is connected with two return branch pipes (15) through a tee joint; the horizontal side end of each injection cavity (202) of the dryer (2) is connected with an injection branch pipe (16), the injection branch pipe (16) is provided with a third valve (17), all the injection branch pipes (16) on one side of the dryer (2) are jointly connected with one of the return branch pipes (15), and all the injection branch pipes (16) on the other side of the dryer (2) are jointly connected with the other return branch pipe (15).

2. The dynamic drying device for tipping paper dot matrix according to claim 1, characterized in that: the drying air flow guide grooves (201) are distributed in a direction perpendicular to the direction of the movement of the tipping paper. ​ ​ ​ ​ ​ ​ ​ ​ ​ 3. The water-based paper point array dynamic drying device according to claim 1, characterized in that: The dryer (2) is provided with a plurality of parallel transverse partitions (210), and adjacent drying air flow guide channels (201) are separated by the transverse partitions (210), and a gap of 2-5 mm exists between the lower end of the transverse partitions (210) and the surface of the water-based paper, and a gap of 2-5 mm exists between the lower end of the heating rod (209) and the surface of the water-based paper.

4. The water-based paper point array dynamic drying device according to claim 1, characterized in that: The range of transverse distribution of the plurality of heating rods (209) in the drying air flow guide channel (201) matches the transverse width of the water-based paper.

5. The water-based paper point array dynamic drying device according to claim 1, characterized in that: The air flow rates in each drying air flow guide channel (201) are the same.

6. The water-based paper point array dynamic drying device according to claim 1, characterized in that: With the advancing direction of the water-based paper as the reference, the air flow rate in the upstream drying air flow guide channel (201) is greater than the air flow rate in the downstream drying air flow guide channel (201).

7. A control method of a dot-matrix dynamic drying device of tipping paper, characterized in that, The water-based paper point array dynamic drying device according to any one of claims 1 to 6, comprising the following steps: S1. The water-based paper advances at a uniform speed through the conveying mechanism, the first valve (207) of all the external air injection pipes (205) is opened, and air flows from the external air injection pipes (205), the air injection top pipe (203), the injection cavity (202) into the drying air flow guide channel (201), and the heating rod (209) in each drying air flow guide channel (201) starts initial heating according to the system preset heating power; S2. The first air pump (9) on the moisture treatment pipe (8) and the second air pump (12) on the hot air flow return pipe (11) start to work, the air flow in each drying air flow guide channel (201) enters the exhaust connecting pipe (3) through the exhaust pipe (208), and the humidity sensor (4) on each exhaust connecting pipe (3) detects the humidity of the air flow in the exhaust connecting pipe (3): If the air humidity W x is not lower than the reference humidity W b preset by the system, the second valve (7) of the first shunt branch pipe (5) connected by the exhaust connecting pipe (3) is opened, the second valve (7) of the second shunt branch pipe (6) is closed, the humid air flows into the first shunt branch pipe (5) and enters the wet gas treatment pipe (8); If the air humidity W x is lower than the reference humidity W b preset by the system, the second valve (7) connected to the second shunt branch (6) is opened, the second valve (7) connected to the first shunt branch (5) is closed, the humidity standard hot air flow enters the second shunt branch (6) and enters the gas collecting tank (10); S3. The wet gas stream entering the gas collector (10) enters the hot gas stream return pipe (11), and a temperature sensor (13) detects the temperature of the gas stream, denoted as T x ; a second flow rate sensor (14) of the hot gas stream return pipe (11) senses and detects the flow rate of the gas stream, denoted as V x ; Wherein, taking the advancing direction of the tipping paper as the reference: the system presets the required drying air flow reference temperature of each drying air flow guide slot (201) in turn as {T1, T2, T3,..., Tn}, and the system presets the required reference air flow flow rate of each drying air flow guide slot (201) as {V1, V2, V3,..., Vn}. n}, the system presets the required reference air flow flow rate of each drying air flow guide slot (201) as {V1, V2, V3,..., Vn}. n}, the system presets the required reference air flow flow rate of each drying air flow guide slot (201) as {V1, V2, V3,..., Vn}. The system analyzes the air flow temperature T x and the magnitude relationship with each reference temperature of the drying air flows {T1, T2, T3,..., T n}, and analyzes that among {T1, T2, T3,..., T n}, if T s , T s+1 , T s ≤T x <T s+1 , then the third valve (17) of the injection branch pipe (16) connected to the drying air flow guide groove (201) with the reference temperature of the drying air flow being T s is opened, and the air flow enters the drying air flow guide groove (201) meeting the temperature standard, and analyzes the reference air flow velocity V s corresponding to the drying air flow guide groove (201) with the reference temperature of the drying air flow being T s : If the air flow rate V x The reference air flow rate V s The dry air flow reference temperature is T s The first valve (207) of the external air injection pipe (205) connected to the dry air flow guide channel (201) is closed. If the airflow velocity V x Below the reference airflow velocity V s The reference temperature of the drying airflow is T. s The first valve (207) of the external air injection pipe (205) connected to the dry airflow guide channel (201) is linearly opened, so that the airflow velocity detected by the first flow velocity sensor (206) is V. s -V x Meanwhile, the reference temperature of the drying airflow is T. s The power P of the heating rod in the drying airflow guide groove (201) and the airflow velocity V injected by the external air injection pipe (205) s -V x There exists a relationship: F(P) ∝ F(V) s -V x ).

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