Papermaking method for reconstituted tobacco leaf pulp stabilization control system and control method thereof

Abstract

The application discloses a papermaking method reconstituted tobacco pulping stability control system and a control method thereof, wherein the papermaking method reconstituted tobacco pulping stability control system comprises a pre-beating pulp tank, a first low-concentration double-disc refiner, a second low-concentration double-disc refiner, a cylindrical refiner and a post-beating pulp tank, a reflux pipeline is arranged between the second low-concentration double-disc refiner outlet and the pre-beating pulp tank, a first regulating component is arranged between the pre-beating pulp tank and the first low-concentration double-disc refiner, a second regulating component is arranged between the second low-concentration double-disc refiner and the cylindrical refiner, and a third regulating component is arranged on the reflux pipeline; the first regulating component, the second regulating component and the third regulating component in the application can realize real-time regulation of the flow at each part in the whole system; the design of the reflux pipeline and the third regulating component realizes the staged control of the pulp throughput of the low-concentration double-disc refiner and the cylindrical refiner, thereby ensuring the continuous operation and stability of the pulping process and improving the pulp quality stability.

Description

Technical Field

[0001] This invention relates to the field of reconstituted tobacco pulping technology, and in particular to a stable control system and control method for reconstituted tobacco pulping in a papermaking process. Background Technology

[0002] Pulping technology is the process of using pulping equipment to break down, cut, and separate insoluble materials into a series of longitudinal and transverse morphological changes under mechanical force, ultimately forming pulp that can be used for papermaking. In the production of reconstituted tobacco in papermaking, pulping technology is the foundation of substrate fabrication, and the stability control of the pulping process directly affects the stability level of pulp quality and the stability of substrate physical properties.

[0003] In the production of reconstituted tobacco using the papermaking process, tobacco stems are extracted, soaked, and swell after absorbing water. During pulping, the swelled stems need to be loosened and cut through shearing and friction in a refiner. Currently, commonly used refiners in the industry include dual-disc refiners, conical refiners, and cylindrical refiners. Compared to the paper industry, due to the different material properties, the wear and tear of refiner blades in reconstituted tobacco pulping is significantly increased. Furthermore, the substrate for reconstituted tobacco requires a certain bulk, absorbency, and softness, placing specific requirements on the material and tooth design of the refiner blades. Therefore, the lifespan of the refiner blades in each mill of the reconstituted tobacco pulping process is relatively short. With the wear of the blades, the main control parameters of the pulping process, especially the pulp throughput and the inlet and outlet pressures of the refiner, fluctuate significantly. When a dual-disc refiner and a cylindrical refiner are connected in series, taking a 50t / day reconstituted tobacco production line as an example, the pulp throughput of the dual-disc refiner is 65m³. 3 At a rate of / h, the slurry throughput of the new grinding discs in the cylindrical pulper can also reach 65m³. 3 / h, however, the grinding discs of a cylindrical refiner wear out faster than those of a dual-disc refiner. This wear causes significant fluctuations in the pulp throughput and inlet / outlet pressure of the cylindrical refiner, typically from the initial operating rate of 65m / h. 3 / h dropped to 50m 3 When the output pressure drops below 60 kPa from around 250 kPa, the pulp quality and stability are severely affected. At the same time, in order to ensure that the pressure in the two grinding zones of the double-disc refiner is balanced and stable, a certain pulp throughput needs to be guaranteed. However, the production capacity of reconstituted tobacco leaves in the papermaking process is relatively small, so the refiner in the pulping process usually works intermittently with many start-ups and shutdowns, which is also an important reason for the fluctuation of pulp quality.

[0004] Therefore, there is a need for a stable control system and control method for reconstituted tobacco pulping in papermaking, which can effectively control the pulping process, ensure the continuity of pulping operations, and improve the stability of pulping control parameters such as pulp throughput and mill inlet and outlet pressures, as well as pulp quality. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by providing a stable control system and control method for reconstituted tobacco pulping in a papermaking process.

[0006] The technical solution adopted to achieve the above objectives is:

[0007] A stable control system for reconstituted tobacco pulping in a papermaking process includes a pre-beating pulp tank, a primary pulping treatment mechanism, a secondary pulping treatment mechanism, and a post-beating pulp tank. The mixed materials sequentially pass through the pre-beating pulp tank, the primary pulping treatment mechanism, the secondary pulping treatment mechanism, and the post-beating pulp tank, and the pulp obtained is stored in the post-beating pulp tank. The primary pulping treatment mechanism includes a first low-consistency double-disc refiner and a second low-consistency double-disc refiner.

[0008] A return pipe is provided between the outlet of the second low-concentration double-disc refiner and the pre-refining tank;

[0009] A first regulating component is provided between the pre-pulping tank and the first low-consistency double-disc refiner, and the first regulating component adjusts the flow rate entering the first low-consistency double-disc refiner.

[0010] A second control component is provided between the second low-concentration dual-disc refiner and the cylindrical refiner, and the second control component adjusts the flow rate entering the cylindrical refiner;

[0011] The return pipe is equipped with a third control component, which regulates the flow rate within the return pipe.

[0012] Furthermore, a three-way valve is provided on the return pipe. One end of the three-way valve is connected to the inlet of the pre-slurry tank, and the other end is connected to the sewage pipe. A cleaning component is provided on one side of the return pipe to clean the return pipe and discharge sewage into the sewage pipe with the cooperation of the three-way valve.

[0013] Furthermore, the cleaning assembly includes a cleaning water tank and a cleaning water valve, wherein the cleaning water tank is connected to the return pipe via the cleaning water valve.

[0014] Furthermore, the return pipe is divided into a first section from the outlet of the second low-consistency double-disc refiner to the three-way valve and a second section from the three-way valve to the end of the return pipe.

[0015] The second section is divided into a vertical section and an inclined section. The vertical section is inserted directly into the pre-slurry pool from the three-way valve, and the outlet of the inclined section faces the slurry outlet of the pre-slurry pool.

[0016] Furthermore, the first control component includes a first regulating valve and a first flow meter;

[0017] The first regulating valve and the first flow meter are arranged sequentially at the outlet near the pre-slurry tank.

[0018] Furthermore, the inlet and outlet of the first low-consistency dual-disc refiner are respectively equipped with a first pressure sensor and a second pressure sensor, and the inlet and outlet of the second low-consistency dual-disc refiner are respectively equipped with a third pressure sensor and a fourth pressure sensor.

[0019] Furthermore, the second control component includes a second regulating valve and a second flow meter;

[0020] The second regulating valve and the second flow meter are sequentially located between the outlet of the second low-consistency double-disc refiner and the inlet of the cylindrical refiner.

[0021] Furthermore, a fifth pressure sensor and a sixth pressure sensor are respectively installed at the inlet and outlet of the cylindrical grinding mill.

[0022] Furthermore, the third control component includes a third regulating valve and a third flow meter, which are sequentially installed on the first section of the return pipe.

[0023] This invention also discloses a control method for a stable control system of reconstituted tobacco pulping in a papermaking process, comprising the following steps:

[0024] Step A: After the tobacco stems, fragments and tobacco dust are extracted by the papermaking method, they are mixed with wood pulp and put into the pre-pulping tank.

[0025] Step B: The flow rate from the pre-impact pulp tank into the first low-consistency double-disc refiner is adjusted by the first control component, thereby adapting the inlet and outlet pressures of the first low-consistency double-disc refiner and the inlet and outlet pressures of the second low-consistency double-disc refiner.

[0026] Step C: After the slurry comes out of the second low-consistency double-disc refiner, it is divided. Part of it enters the pre-reaction slurry tank through the return pipe for secondary treatment, and the remaining slurry enters the cylindrical refiner for secondary treatment. The specific flow rates of the slurry entering the return pipe and the cylindrical refiner are adjusted by the second and third control components, respectively.

[0027] Step D: After being pulped by a cylindrical grinding mill, the pulp is stored in a post-pulping tank.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. In this invention, the first, second, and third control components regulate the flow rate at various points within the entire system in real time. The design of the return pipe and the third control component enables graded control of the pulp throughput of the first low-consistency double-disc refiner, the first low-consistency double-disc refiner, and the cylindrical refiner, ensuring the continuity of the pulping process. At the same time, it solves the problem of pulp throughput and mill inlet / outlet pressure fluctuations caused by the different wear cycles of the grinding discs of the two refiners when they operate in series, thus improving pulping control parameters such as pulp throughput and mill inlet / outlet pressure, as well as the stability of pulp quality.

[0030] 2. The design of the return pipe in this invention returns a batch of pulp from the outlet of the second low-consistency double-disc refiner to the pre-return pulp tank, allowing some of the unrefined swollen tobacco stems, tobacco stem fiber bundles, and excessively long wood pulp fibers to undergo secondary treatment. This reduces the load on the cylindrical refiner, enabling it to operate at lower power. It also reduces the excessive crushing of fragments and tobacco dust and the excessive cutting of unrefined tobacco stems. While maintaining high fiber length and coarseness, the pulp is more uniform and free of tobacco stem particles, thus avoiding paper machine breakage caused by tobacco stem particles in the pulp.

[0031] 3. The present invention has a cleaning component in the return pipeline. When each pulping machine in the pulping process stops, the switch valve of the cleaning water pipeline is opened. The pulp in the return pipeline is recovered to the pre-pulping pulp tank in the first 10 seconds of cleaning. After cleaning, the three-way valve is switched to the sewage pipeline in the last 20 seconds to wash away the residual pulp in the return pipeline. This ensures the effective utilization rate of tobacco raw materials while avoiding pulp residue and rancidity.

[0032] 4. The return pipe of the present invention is divided into a first section and a second section. The second section is located in the pre-refining slurry tank and is divided into a vertical section and an inclined section. The outlet of the inclined section faces the slurry outlet of the pre-refining slurry tank, ensuring that the return slurry is quickly transported to the refining machine under the suction action of the pre-refining slurry tank pump, thus avoiding over-refining.

[0033] 5. The present invention is equipped with pressure sensors at the inlet and outlet of the first low-consistency double-disc refiner, the second low-consistency double-disc refiner, and the cylindrical refiner, which can monitor the pulping pressure in real time and make it easier to adjust through the first adjustment component, the second adjustment component, and the third adjustment component. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the device structure of the present invention.

[0035] Among them, 1-pre-impact pulp tank, 2-first low-consistency double-disc refiner, 3-second low-consistency double-disc refiner, 4-cylindrical refiner, 5-post-impact pulp tank, 6-return pipe, 7-first regulating valve, 8-first flow meter, 9-second regulating valve, 10-second flow meter, 11-third regulating valve, 12-third flow meter, 13-first pressure sensor, 14-second pressure sensor, 15-third pressure sensor, 16-fourth pressure sensor, 17-fifth pressure sensor, 18-sixth pressure sensor, 19-three-way valve, 20-drainage pipe, 21-cleaning water tank, 22-cleaning water valve.

[0036] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] like Figure 1 As shown, this embodiment discloses a stable control system for reconstituted tobacco pulping in a papermaking process, including a pre-beating pulp tank 1, a first low-consistency double-disc refiner 2, a second low-consistency double-disc refiner 3, a cylindrical refiner 4, and a post-beating pulp tank 5. The mixed materials sequentially pass through the pre-beating pulp tank 1, the first low-consistency double-disc refiner 2, the second low-consistency double-disc refiner 3, the cylindrical refiner 4, and the post-beating pulp tank 5, and the resulting pulp is stored in the post-beating pulp tank 5. The first low-consistency double-disc refiner 2 and the second low-consistency double-disc refiner 3 constitute a primary pulping treatment mechanism, and the cylindrical refiner 4 constitutes a secondary pulping treatment mechanism. The outlet of the second low-consistency double-disc refiner 3 is located between the outlet of the second low-consistency double-disc refiner 3 and the inlet of the pre-beating pulp tank 1. A return pipe 6 is provided to return the pulp from the outlet of the second low-consistency double-disc refiner 3 in batches to the pre-return pulp tank 1, so that some of the unrefined swollen tobacco stems, tobacco stem fiber bundles and excessively long wood pulp fibers can be treated in a secondary manner. A first control component is provided between the pre-return pulp tank 1 and the first low-consistency double-disc refiner 2 to regulate the flow rate entering the first low-consistency double-disc refiner 2. A second control component is provided between the second low-consistency double-disc refiner 3 and the cylindrical refiner 4 to regulate the flow rate entering the cylindrical refiner 4. A third control component is provided on the return pipe 6 to regulate the flow rate within the return pipe 6.

[0039] like Figure 1As shown, a three-way valve 19 is provided on the return pipe 6. One end of the three-way valve 19 is connected to the inlet of the pre-slurry tank 1, and the other end is connected to the sewage pipe 20. A cleaning water tank 21 and a cleaning water valve 21 are provided on one side of the return pipe 6. The cleaning water tank 21 and the return pipe 6 are connected by a cleaning water valve 22. The cleaning water tank 21 and the cleaning water valve 21 together form a cleaning assembly to clean the return pipe 6 and discharge the sewage into the sewage pipe 20 with the cooperation of the three-way valve 19.

[0040] like Figure 1 As shown, the return pipe 6 is divided into a first section from the outlet of the second low-consistency double-disc refiner 3 to the three-way valve 19, and a second section from the three-way valve 19 to the end of the return pipe 6. The second section is divided into a vertical section and an inclined section. The vertical section is inserted directly into the pre-refining slurry tank 1 from the three-way valve 19, and the outlet of the inclined section faces the slurry outlet of the pre-refining slurry tank 1, ensuring that the return slurry is quickly transported to the refiner under the suction of the pre-refining slurry tank pump, avoiding over-refining.

[0041] like Figure 1 As shown, the first control component includes a first regulating valve 7 and a first flow meter 8. The first regulating valve 7 and the first flow meter 8 are arranged sequentially near the outlet of the pre-slurry tank 1, and can regulate the flow rate of slurry from the pre-slurry tank 1 to the first low-consistency double-disc refiner 2. The inlet and outlet of the first low-consistency double-disc refiner 2 are respectively equipped with a first pressure sensor 13 and a second pressure sensor 14, and the inlet and outlet of the second low-consistency double-disc refiner 3 are respectively equipped with a third pressure sensor 15 and a fourth pressure sensor 16. The first pressure sensor 13 and the second pressure sensor 14 can monitor the pressure at the inlet and outlet of the first low-consistency double-disc refiner 2 in real time, and the third pressure sensor 15 and the fourth pressure sensor 16 can adjust the pressure at the inlet and outlet of the second low-consistency double-disc refiner 3 in real time. In use, after roughly adjusting the flow rate through the first regulating valve 7, the first regulating valve 7 is then adjusted in detail by observing the pressure values ​​displayed by the first pressure sensor 13, the second pressure sensor 14, the third pressure sensor 15 and the fourth pressure sensor 16 to ensure that the pressure values ​​at each inlet and outlet meet the requirements.

[0042] like Figure 1As shown, the second control component includes a second regulating valve 9 and a second flow meter 10, which are sequentially located between the outlet of the second low-consistency double-disc refiner 3 and the inlet of the cylindrical refiner 4. The third control component includes a third regulating valve 11 and a third flow meter 12, which are sequentially located on the first section of the return pipe 6. The second regulating valve 9 mainly regulates the flow rate of pulp from the second low-consistency double-disc refiner 3 to the cylindrical refiner 4, and the third regulating valve 11 mainly regulates the flow rate of pulp returning from the second low-consistency double-disc refiner 3 to the pre-return pulp tank 1. The two components work together to return a portion of the pulp after being pulped by the second low-consistency double-disc refiner 4 to the pre-return pulp tank 1, allowing some of the unrefined swollen tobacco stems, tobacco stem fiber bundles, and excessively long wood pulp fibers to undergo secondary treatment, thus reducing the pressure on the cylindrical refiner. The load of the cylindrical refiner 4 allows it to operate at lower power, reducing excessive crushing of tobacco scraps and dust and excessive cutting of unrefined tobacco stems. This results in a more uniform pulp with no tobacco stem particles, while maintaining higher fiber length and coarseness, thus preventing paper machine breakage caused by tobacco stem particles in the pulp. A fifth pressure sensor and a sixth pressure sensor are installed at the inlet and outlet of the cylindrical refiner, respectively. In actual use, the flow rates of pulp entering the cylindrical refiner 4 and the return pipe 6 are roughly adjusted sequentially by the second regulating valve 9 and the third regulating valve 11. Specific adjustments are then made to the second regulating valve 9 and the third regulating valve 11 based on the pressure readings at the inlet and outlet of the cylindrical refiner 4 provided by the fifth pressure sensor 17 and the sixth pressure sensor 18, to meet specific pressure requirements.

[0043] When this system is in use, the first regulating valve 7 is used to control the pulp throughput of the first low-consistency double-disc refiner 2 and the second low-consistency double-disc refiner 3 throughout the entire grinding disc usage cycle to (70~75) m. 3 / h, and simultaneously through the displays of the first pressure sensor 13, the second pressure sensor 14, the third pressure sensor 15, and the fourth pressure sensor 16, the inlet pressure of the first low-consistency double-disc refiner 2 is controlled at (150~160) kPa, and the outlet pressure is controlled at (310~330) kPa; the inlet pressure of the second low-consistency double-disc refiner 3 is controlled at (310~325) kPa, and the outlet pressure is controlled at (415~435) kPa; the pulp throughput of the cylindrical refiner 4 throughout the entire grinding disc usage cycle is (50~55) m. 3 / h, and simultaneously through the displays of the fifth pressure sensor 17 and the sixth pressure sensor 18, the inlet pressure of the cylindrical refiner is controlled at (405~420) kPa and the outlet pressure is controlled at (250~280) kPa, realizing stable control of the inlet and outlet pressures of the refiner in the papermaking reconstituted tobacco pulping process. At the same time, through the regulation of the third regulating valve 11, the flow rate of pulp returning through the return pipe 6 is (15~20) m 3 / h, allowing some of the unrefined swollen tobacco stems, tobacco stem fiber bundles, and excessively long wood pulp fibers to undergo secondary treatment, reducing the load on the cylindrical refiner 4. The cylindrical refiner 4 operates at a lower power (110~115) kW, reducing the excessive crushing of fragments and tobacco dust and the excessive cutting of unrefined tobacco stems. While maintaining a high length and coarseness of pulp fibers, the pulp is more uniform and free of tobacco stem particles, avoiding paper machine breakage caused by tobacco stem particles in the pulp.

[0044] The specific control method of the control system of the present invention includes the following steps:

[0045] Step A: After reconstituted tobacco leaves are extracted using the papermaking method, tobacco stems, fragments, and tobacco dust are mixed with wood pulp and then fed into the pre-pulp tank 1.

[0046] Step B: The flow rate from the pre-impact pulp tank 1 into the first low-consistency double-disc refiner 2 is adjusted by the first control component, thereby adapting the inlet and outlet pressures of the first low-consistency double-disc refiner 2 and the inlet and outlet pressures of the second low-consistency double-disc refiner 3.

[0047] Step C: After the slurry comes out of the second low-consistency double-disc refiner 3, it is divided. Part of it enters the pre-reaction slurry tank 1 through the return pipe 6 for secondary treatment, and the remaining slurry enters the cylindrical refiner 4 for secondary treatment. The flow rate of the slurry entering the return pipe 6 and the cylindrical refiner 4 is adjusted by the second control component and the third control component, respectively.

[0048] Step D: After being pulped by the cylindrical refiner 4, the pulp enters the post-refining tank 5 for storage;

[0049] Step E: When each pulping machine in the pulping process is stopped, the cleaning water valve 22 is opened. 10 seconds before cleaning, the pulp in the return pipe 6 is recycled to the pre-cleaning pulp tank 1. 20 seconds after cleaning, the three-way valve 19 is switched to the drain pipe 20 to rinse the residual pulp in the return pipe 6, ensuring the effective utilization rate of tobacco raw materials while avoiding pulp residue and rancidity.

[0050] In the description of this invention, it should be understood that the terms "center", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0051] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stable control system for reconstituted tobacco pulping in a papermaking process, comprising a pre-beating pulp tank, a primary beating mechanism, a secondary beating mechanism, and a post-beating pulp tank, wherein a mixture sequentially passes through the pre-beating pulp tank, the primary beating mechanism, the secondary beating mechanism, and the post-beating pulp tank, and the resulting pulp is stored in the post-beating pulp tank, characterized in that... The primary pulping treatment unit includes a first low-consistency double-disc refiner and a second low-consistency double-disc refiner, and the secondary pulping treatment unit includes a cylindrical refiner. A return pipe is provided between the outlet of the second low-concentration double-disc refiner and the pre-refining tank; A first regulating component is provided between the pre-pulping tank and the first low-consistency double-disc refiner, and the first regulating component adjusts the flow rate entering the first low-consistency double-disc refiner. A second control component is provided between the second low-concentration dual-disc refiner and the cylindrical refiner, and the second control component adjusts the flow rate entering the cylindrical refiner; The return pipe is equipped with a third control component, which regulates the flow rate within the return pipe. The return pipe is equipped with a three-way valve. One end of the three-way valve is connected to the inlet of the pre-slurry tank, and the other end is connected to the sewage pipe. A cleaning component is provided on one side of the return pipe to clean the return pipe and discharge the sewage into the sewage pipe with the cooperation of the three-way valve.

2. The papermaking reconstituted tobacco pulping stability control system according to claim 1, characterized in that, The cleaning assembly includes a cleaning water tank and a cleaning water valve, and the cleaning water tank is connected to the return pipe through the cleaning water valve.

3. The papermaking reconstituted tobacco pulping stability control system according to claim 2, characterized in that, The return pipe is divided into a first section from the outlet of the second low-consistency double-disc refiner to the three-way valve, and a second section from the three-way valve to the end of the return pipe. The second section is divided into a vertical section and an inclined section. The vertical section is inserted directly into the pre-slurry pool from the three-way valve, and the outlet of the inclined section faces the slurry outlet of the pre-slurry pool.

4. The papermaking reconstituted tobacco pulping stability control system according to claim 3, characterized in that, The first control component includes a first regulating valve and a first flow meter; The first regulating valve and the first flow meter are arranged sequentially at the outlet near the pre-slurry tank.

5. A stable control system for reconstituted tobacco pulping in a papermaking process according to claim 4, characterized in that, The first low-consistency double-disc refiner is equipped with a first pressure sensor and a second pressure sensor at its inlet and outlet, respectively, and the second low-consistency double-disc refiner is equipped with a third pressure sensor and a fourth pressure sensor at its inlet and outlet, respectively.

6. A stable control system for reconstituted tobacco pulping in a papermaking process according to claim 4, characterized in that, The second control component includes a second regulating valve and a second flow meter; The second regulating valve and the second flow meter are sequentially located between the outlet of the second low-consistency double-disc refiner and the inlet of the cylindrical refiner.

7. A stable control system for reconstituted tobacco pulping in a papermaking process according to claim 6, characterized in that, The cylindrical grinding mill is equipped with a fifth pressure sensor and a sixth pressure sensor at its inlet and outlet, respectively.

8. A stable control system for reconstituted tobacco pulping in a papermaking process according to claim 6, characterized in that, The third control component includes a third regulating valve and a third flow meter, which are sequentially installed on the first section of the return pipe.

9. A control method for a stable control system for reconstituted tobacco pulping in a papermaking process, based on any one of claims 1-8, characterized in that, Includes the following steps: Step A: After the tobacco stems, fragments and tobacco dust are extracted by the papermaking method, they are mixed with wood pulp and put into the pre-pulping tank. Step B: The flow rate from the pre-impact pulp tank into the first low-consistency double-disc refiner is adjusted by the first control component, thereby adapting the inlet and outlet pressures of the first low-consistency double-disc refiner and the inlet and outlet pressures of the second low-consistency double-disc refiner. Step C: After the slurry comes out of the second low-consistency double-disc refiner, it is divided. Part of it enters the pre-reaction slurry tank through the return pipe for secondary treatment, and the remaining slurry enters the cylindrical refiner for secondary treatment. The specific flow rates of the slurry entering the return pipe and the cylindrical refiner are adjusted by the second and third control components, respectively. Step D: After being pulped by a cylindrical grinding mill, the pulp enters the post-pulping tank for storage.

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