Equipment for tobacco shred expansion treatment, control method of equipment and tobacco shred production line
By coordinating the design of the steam main circuit unit, the compressed air bypass unit, and the electric heating unit, the problem of steam condensate adhesion in the tobacco expansion treatment equipment was solved, achieving efficient and stable operation of the equipment and improving the quality of the tobacco.
Patent Information
- Application Number
- CN202511899767.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-01-23
AI Technical Summary
Existing tobacco expansion processing equipment suffers from steam condensation adhering to the inner wall of the equipment during preheating and production, resulting in uneven tobacco quality, affecting product quality, and the cleaning process is complicated and consumes labor and energy.
The system employs a collaborative design of a steam main circuit unit, a compressed air bypass unit, and an electric heating unit. By preheating the compressed air and using an electric heater, the steam is converted into superheated steam, avoiding the generation of condensate and achieving seamless equipment switching and stable steam supply.
It significantly improves the quality and efficiency of tobacco expansion, reduces energy consumption, enhances the automation level and operational reliability of the equipment, and avoids problems such as uneven wetting and clumping of tobacco caused by condensation.
Smart Images
Figure CN121369747A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of cut tobacco manufacturing equipment, in particular to an equipment for cut tobacco expansion treatment, a control method thereof and a cut tobacco production line. BACKGROUND
[0002] The SIROX expander is a device for warming and humidifying cut tobacco before it is dried, which uses a large amount of saturated steam to warm and humidify the cut tobacco during steam delivery, and then delivers the cut tobacco to a downstream tobacco dryer for rapid drying, so that the water in the tobacco cells evaporates rapidly, and the tobacco structure is fully expanded.
[0003] To ensure the uniformity of cut tobacco warming and humidification, in the past, steam was directly sprayed into the interior of the SIROX expander to preheat the equipment before the cut tobacco was fed, but the sprayed steam would quickly condense to form condensate water adhering to the inner wall of the equipment in a normal pressure and temperature environment, and part of the water vapor would diffuse to the heat preservation vibration tank at the outlet, forming condensate water adhering to the inner wall of the heat preservation vibration tank. When the cut tobacco arrives, it will mix with the condensate water adhering to the inner wall of the equipment to form water stained tobacco or wet clumps, and then produce yellow spot tobacco, thereby affecting the product quality. At the same time, after batch production is completed, the interior of the SIROX expander needs to be cleaned with water, and the cleaning water will also adhere to the inner wall. When the next batch of cut tobacco is fed, it will also mix with the residual water to form water stained tobacco or wet clumps, and then produce yellow spot tobacco, thereby affecting the product quality. SUMMARY
[0004] The purpose of the present application is to provide an equipment for cut tobacco expansion treatment, which realizes seamless and automatic switching between the preheating and production modes of the warming and humidifying device. Not only can the equipment be safely and efficiently preheated using heated compressed air to avoid steam condensation, but also stable and reliable superheated steam can be provided during production, significantly improving the quality and efficiency of cut tobacco expansion.
[0005] To achieve this purpose, the present application adopts the following technical solutions:
[0006] The equipment for cut tobacco expansion treatment comprises a steam main unit, a compressed air bypass unit, an electric heating unit and a warming and humidifying device.
[0007] The steam main unit comprises a steam control and regulating valve and a tee joint connected in sequence, and the end of the steam control and regulating valve away from the tee joint is used to connect with a steam source.
[0008] The compressed air bypass unit comprises a compressed air manual on-off valve and a compressed air automatic on-off valve connected in sequence, the end of the compressed air manual on-off valve away from the compressed air automatic on-off valve is used to connect with a compressed air source, and the outlet pipeline of the compressed air bypass unit is connected with the tee joint.
[0009] The electric heating unit comprises an electric heater, an air inlet of the electric heater being connected to the outlet of the tee joint through a pipeline, and an air outlet of the electric heater being connected to a steam inlet of the temperature and humidity increasing device.
[0010] As a preferred, a condensed water discharge unit connected to the bottom of the electric heater is further included for discharging condensed water generated inside the electric heater;
[0011] The condensed water discharge unit comprises a steam condensed water discharge automatic stop valve connected to the bottom of the electric heater through a pipeline and a trap valve for discharging water to the outside through a pipeline.
[0012] As a preferred, the condensed water discharge unit further comprises a manual stop valve and a filter arranged between the steam condensed water discharge automatic stop valve and the trap valve and connected through pipelines, the manual stop valve being connected to the steam condensed water discharge automatic stop valve, and the filter being connected to the trap valve.
[0013] As a preferred, the condensed water discharge unit further comprises a sight glass and / or a first check valve arranged on the pipeline downstream of the trap valve.
[0014] As a preferred, the compressed air bypass unit further comprises a compressed air filter pressure regulating valve arranged upstream of the compressed air automatic on-off valve.
[0015] As a preferred, the compressed air bypass unit further comprises a second check valve arranged downstream of the compressed air pneumatic on-off stop valve.
[0016] And / or, the tee joint is a tee regulating valve.
[0017] As a preferred, a temperature sensor is arranged on the pipeline between the air outlet of the electric heater and the steam inlet of the temperature and humidity increasing device.
[0018] Another object of the present application is to provide a control method of the device for tobacco expansion treatment, which can improve the energy efficiency of the device and ensure stable operation of the device.
[0019] To achieve the above object, the present application adopts the following technical solutions:
[0020] The control method of the device for tobacco expansion treatment is used for controlling the device for tobacco expansion treatment as described above, and comprises the following steps:
[0021] S1, before production of the temperature and humidity increasing device, the temperature and humidity increasing device is preheated by the compressed air bypass unit and the electric heating unit;
[0022] S2, after preheating the inside of the temperature and humidity increasing device for a set time and the tobacco reaches the temperature and humidity increasing device, supplying steam to the temperature and humidity increasing device through the steam main unit and the electric heating unit.
[0023] Preferably, the step S1 comprises:
[0024] closing the steam control regulating valve of the steam main unit, opening the compressed air automatic on-off valve of the compressed air bypass unit and the electric heater of the electric heating unit, and making the compressed air enter and pass through the electric heater to be heated and then enter the temperature and humidity increasing device;
[0025] and / or;
[0026] The step S2 comprises:
[0027] when the preheating reaches the set time and the tobacco reaches the temperature and humidity increasing device, closing the compressed air automatic on-off valve of the compressed air bypass unit and opening the steam control regulating valve of the steam main unit, and making the steam enter and pass through the electric heater of the electric heating unit to be heated and then enter the temperature and humidity increasing device;
[0028] and / or,
[0029] The step S2 further comprises:
[0030] S3, after the tobacco processing is completed, closing the steam control regulating valve of the steam main unit, keeping the compressed air automatic on-off valve of the compressed air bypass unit closed and the electric heating unit powered off.
[0031] Another object of the present application is to provide a tobacco production line which, by integrating the full-automatic preheating and superheated steam control functions, significantly improves the tobacco expansion efficiency and the product quality consistency, and effectively reduces the energy consumption and the manual operation risk.
[0032] To achieve the above object, the present application adopts the following technical solutions:
[0033] The tobacco production line comprises the device for tobacco expansion processing as described above.
[0034] The present application has the following advantages:
[0035] The device for tobacco expansion treatment provided by the application comprises a steam main unit, a compressed air bypass unit, an electric heating unit and a temperature and humidity increasing device; the steam main unit comprises a steam control regulating valve and a tee joint connected in sequence, and the steam control regulating valve is connected with a steam source at one end away from the tee joint; the compressed air bypass unit comprises a compressed air manual on-off valve and a compressed air automatic on-off valve connected in sequence, and the compressed air manual on-off valve is connected with a compressed air source at one end away from the compressed air automatic on-off valve; the outlet pipeline of the compressed air bypass unit is connected with the tee joint; the electric heating unit comprises an electric heater, and the air inlet of the electric heater is connected with the outlet of the tee joint through a pipeline, and the air outlet of the electric heater is connected with the steam inlet of the temperature and humidity increasing device. The device solves the problem of inherent condensate water of the steam system by introducing the compressed air bypass unit and the electric heating unit. In the starting stage of the device, the heated compressed air can be used to dry and preheat the temperature and humidity increasing device, effectively remove the residual moisture in the cavity, and avoid the tobacco being wetted by a large amount of condensate water generated when the steam directly contacts the device; in the production switching stage, the electric heater can reliably heat the steam into superheated steam, significantly reduce the relative humidity, and ensure that the medium sprayed on the tobacco is always in a dry state, thereby greatly improving the expansion efficiency of the tobacco and the product quality, and the device has high integration and high reliability.
[0036] The control method of the device for tobacco expansion treatment provided by the application is used for controlling the device for tobacco expansion treatment as described above, and comprises the following steps: S1, preheating the inside of the temperature and humidity increasing device by using the compressed air bypass unit and the electric heating unit before production; and S2, supplying steam to the temperature and humidity increasing device by using the steam main unit and the electric heating unit after the inside of the temperature and humidity increasing device is preheated for a set time and the tobacco reaches the temperature and humidity increasing device. The control method realizes the automation and precision of the preheating process by setting clear preheating and production stages. The time sequence control logic of preheating by high-temperature compressed air and then switching to superheated steam not only eliminates the generation of condensate water in the preheating stage, but also guarantees the stability and dryness of the process medium in the production stage. Moreover, the method realizes seamless and safe switching between the two kinds of gas sources, and ensures the accurate matching of the electric heating power and the process demand, so that the product quality, equipment safety and energy utilization can be improved without manual intervention.
[0037] The tobacco production line provided by the application comprises the device for tobacco expansion treatment as described above. The device for tobacco expansion treatment of the tobacco production line can stably produce tobacco with higher expansion rate and more uniform quality by integrating the preheating and superheating steam control functions, and fundamentally eliminates quality problems such as uneven tobacco moistening and adhesion and caking caused by condensed water. Meanwhile, the device is safer and more reliable in operation, energy consumption is reduced, the maintenance period is prolonged, and the synchronous growth of production efficiency, product quality and comprehensive economic benefits is realized. BRIEF DESCRIPTION OF DRAWINGS
[0038] Figure 1 Fig. 1 is a schematic diagram of a connecting pipeline of the device for tobacco expansion treatment in the embodiment of the application.
[0039] In the drawings:
[0040] 11, steam control regulating valve; 12, three-way piece;
[0041] 21, compressed air manual on-off valve; 22, compressed air automatic on-off valve; 23, compressed air filter pressure regulating valve; 24, second check valve;
[0042] 31, steam condensate discharge automatic stop valve; 32, drain valve; 33, manual stop valve; 34, filter; 35, sight glass; 36, first check valve;
[0043] 4, electric heater; 5, temperature sensor. DETAILED DESCRIPTION
[0044] The application will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings, not all the structures.
[0045] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0046] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.
[0047] In the description of the present embodiments, the terms "upper", "lower", "right", "left", and other orientation or position relations shown in the drawings are based on the orientation or position relations shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0048] The device for tobacco expansion treatment provided in some embodiments of the present application, such as Figure 1As shown, the device includes a steam main unit, a compressed air bypass unit, an electric heating unit and a temperature and humidity increasing device. The steam main unit includes a steam control regulating valve 11 and a tee 12 connected in sequence, and the steam control regulating valve 11 is connected to a steam source at one end away from the tee 12. The compressed air bypass unit includes a compressed air manual on-off valve 21 and a compressed air automatic on-off valve 22 connected in sequence, and the compressed air manual on-off valve 21 is connected to a compressed air source at one end away from the compressed air automatic on-off valve 22, and an outlet pipeline of the compressed air bypass unit is connected to the tee 12. In some specific embodiments, the compressed air manual on-off valve 21 is a manual ball valve, and the compressed air automatic on-off valve 22 is a pneumatic on-off stop valve. The electric heating unit includes an electric heater 4, and an air inlet of the electric heater 4 is connected to an outlet of the tee 12 through a pipeline, and an air outlet of the electric heater 4 is connected to a steam inlet of the temperature and humidity increasing device. In this embodiment, the temperature and humidity increasing device adopts a SIROX expander, and therefore, the temperature and humidity increasing device is referred to as a SIROX expander hereinafter, which should be understood as the same device. It can be understood that the device builds a multi-level preheating mechanism through the introduction of the compressed air bypass unit and the cooperative design of the electric heating unit. First, in the preheating stage, the device provides a dry heat source through the compressed air bypass unit, which fundamentally avoids the problem of condensate water caused by the contact between the surface of the low-temperature device and the high-temperature steam in the traditional steam preheating process, and ensures that the SIROX expander cavity is in a dry and uniform hot state before feeding. Secondly, in the production stage, the electric heating unit as the core part can stably heat the saturated steam into superheated steam, significantly reducing the relative humidity, so as to ensure that the process medium sprayed onto the tobacco is always in an absolutely dry state, which not only greatly improves the expansion efficiency and filling value of the tobacco, but also effectively prevents the quality problems such as tobacco caking and darkening caused by condensate water wetting. Moreover, the design integrates the steam main and the compressed air bypass through the tee 12, which is compact in structure and realizes smooth and reliable switching between the two working modes, thereby improving the process quality and enhancing the automation degree and operation reliability of the system itself.
[0049] In some embodiments, the electric heater 4 has a power of 20 KW and a PID regulating function, and can automatically adjust the heating power according to the temperature of the outlet steam or compressed air of the electric heater 4. It can be understood that the adoption of 20 KW power and the integration of the PID regulating function can not only provide sufficient heat to ensure that the medium quickly rises to the set temperature, but also can realize real-time and accurate closed-loop control of the temperature of the outlet steam or compressed air through the PID algorithm, effectively suppress the temperature fluctuation, and thereby always keep the steam above the target superheat degree to completely prevent the generation of condensate water, or accurately maintain the compressed air at the optimal preheating temperature, thereby improving the process stability and product quality consistency, avoiding the over-supply and waste of energy, and achieving the balance between heating efficiency and energy consumption.
[0050] In some embodiments, the apparatus for tobacco expansion treatment in the present embodiments further comprises a condensed water discharging unit connected to the bottom of the electric heater 4 for automatically discharging the condensed water generated inside the electric heater 4. As shown in FIG. 2, the condensed water discharging unit comprises a condensed water discharging pipe 5 connected to the bottom of the electric heater 4, a condensed water discharging pump 6 connected to the condensed water discharging pipe 5, and a condensed water discharging valve 7 connected to the condensed water discharging pump 6. Figure 1As shown, the condensed water discharge unit includes a steam condensed water discharge automatic stop valve 31 and a trap 32 connected by a pipeline, the steam condensed water discharge automatic stop valve 31 is connected with the bottom of the electric heater 4 through a pipeline, and the trap 32 is connected with the outside, for example, a floor drain, through a pipeline. In some specific embodiments, the steam condensed water discharge automatic stop valve 31 is a pneumatic on-off stop valve, and the trap 32 is a float type trap. The steam condensed water discharge automatic stop valve 31 is set as a pneumatic on-off stop valve, which has the characteristics of good sealing and fast response, realizes remote automatic on-off control of the condensed water discharge pipeline, and is convenient for system integration and emergency shutdown. In combination with the float type trap 32, which has the characteristics of continuous and instantaneous discharge of condensed water without being affected by pressure fluctuations, it ensures that there is no water accumulation in the equipment and maintains a very high heat exchange efficiency, while effectively preventing steam leakage (steam blocking drainage). The combination of the two realizes automatic control of the drainage process and maximizes energy utilization and equipment operation stability. It can be understood that when the equipment is just started, the electric heater 4 itself and the steam pipeline connected to it are cold (at ambient temperature), and when the steam from the boiler or main pipeline as the steam source enters these low-temperature metal pipelines and equipment for the first time, it will exchange heat with the ice-cold metal wall, and the steam will quickly transfer its latent heat to the metal, reducing its temperature, and thus condensing from a gaseous state (steam) to a liquid state (water). Moreover, the steam is saturated steam, and its temperature and pressure have a one-to-one correspondence. If the temperature decreases or the pressure increases, it will deviate from the saturated state, and part of the steam will condense into water. During the transportation of steam, even if the pipeline is insulated, there will still be heat loss. This part of the heat loss will cause the steam temperature to drop slightly, thus continuously producing a small amount of condensed water. Therefore, although the electric heater 4 is provided on the pipeline, so that the steam becomes superheated steam after passing through the electric heater 4, significantly reducing its relative humidity, and also compensating for the heat loss of the steam in the pipeline to ensure the steam temperature input into the SIROX expander, but before reaching the electric heater 4, the steam will still condense. Therefore, in this embodiment, a condensed water discharge unit is provided at the bottom of the electric heater 4. The steam condensed water discharge automatic stop valve 31 serves as the main control switch and can be opened and closed according to the working mode. It remains closed during the preheating stage to prevent compressed air leakage and is opened in time to discharge water during the production stage. The float type trap 32 realizes steam blocking drainage by virtue of its mechanical automatic working characteristics, ensuring that the accumulated condensed water is discharged while minimizing the escape loss of steam. The combination of automatic control and mechanical protection realizes double protection, which not only ensures the stability of the electric heater 4 heat exchange efficiency and avoids equipment corrosion and affects the tobacco quality caused by condensed water accumulation, but also significantly improves the overall energy utilization efficiency of the system.
[0051] In some embodiments, the condensate water discharge unit further comprises a manual stop valve 33 and a filter 34 arranged between the steam condensate water discharge automatic stop valve 31 and the trap 32 and connected by pipes, the manual stop valve 33 is connected with the steam condensate water discharge automatic stop valve 31, and the filter 34 is connected with the trap 32. It can be understood that the connection structure of the manual stop valve 33 and the filter 34 arranged between the steam condensate water discharge automatic stop valve 31 and the trap 32 in the condensate water discharge unit significantly improves the maintainability and operation reliability of the system. The addition of the manual stop valve 33 provides a reliable mechanical isolation point for the entire discharge unit. When the filter 34 or the trap 32 downstream needs to be repaired or replaced, the valve can be closed to safely operate without affecting the main pressure of the system body, greatly ensuring the convenience and safety of maintenance operation. At the same time, the arrangement of the filter 34 effectively protects the trap 32, which can effectively intercept and collect solid particles such as rust and scale that may be carried in the steam system and pipes, preventing these impurities from entering and clogging or wearing out the internal precision valve seat and valve cover mechanism of the trap 32. Such arrangement not only prolongs the service life of the trap 32 itself, reduces the frequency of spare parts replacement and maintenance cost, but also ensures the long-term stability of the steam blocking and water draining function of the trap 32, thereby fundamentally ensuring the continuous and smooth discharge of condensate water.
[0052] In some embodiments, the condensate water discharge unit further comprises a sight glass 35 and / or a first check valve 36 arranged on the pipe between the trap 32 and the floor drain. When the sight glass 35 and the first check valve 36 are arranged at the same time, the sight glass 35 is arranged upstream of the first check valve 36. It can be understood that the addition of the sight glass 35 and the first check valve 36 at the end of the condensate water discharge unit realizes the functions of system state monitoring and safety protection. The sight glass 35 as an intuitive observation window enables the operator to clearly observe the discharge state and quality of the condensate water. If continuous steam discharge or abnormal water flow is found, it can be quickly judged whether the float trap is failed, realizing early detection and accurate positioning of faults, and greatly improving the maintenance efficiency. The first check valve 36 downstream effectively prevents sewage, waste steam and other foreign matters in the floor drain or public pipeline from flowing back to the steam system due to back pressure fluctuation, thereby completely eliminating the risk of pollution and corrosion of external medium to the system interior, and ensuring the cleanliness, safety and independence of the entire thermal system operation.
[0053] In some embodiments, the compressed air bypass unit further comprises a compressed air filter pressure regulating valve 23 arranged upstream of the compressed air automatic on-off valve 22. It can be understood that in the compressed air bypass unit, the compressed air filter pressure regulating valve 23 is arranged upstream of the compressed air automatic on-off valve 22, and the filtering function of the compressed air filter pressure regulating valve 23 can effectively remove oil droplets, moisture and solid particles that may be carried in the compressed air, ensure that the medium entering the subsequent electric heater 4 and SIROX expander is clean, and fundamentally avoid the damage and pollution of pollutants to the heating element, tobacco products and precision valves. At the same time, the pressure regulating function can stabilize the fluctuating pipe network pressure at the best set value required by the process, not only providing a stable flow basis for the precise temperature control of the electric heater 4 to prevent temperature abnormalities caused by pressure fluctuations, but also ensuring that the SIROX expander can obtain a stable working condition and reliable quality of the preheated medium when switching to the compressed air mode, thereby ensuring the uniformity of the process effect and the long-term reliability of the system operation as a whole. Moreover, the cooperation of the compressed air filter pressure regulating valve 23 and the downstream compressed air automatic on-off valve 22 forms a high-efficiency and reliable air source management combination. The compressed air filter pressure regulating valve 23 serves as a front-stage processing unit to provide ideal working conditions for the downstream compressed air automatic on-off valve 22. Through the purification function of the compressed air filter pressure regulating valve 23, impurities that may wear and clog the internal precision structure of the pneumatic on-off valve are removed, significantly extending its service life. At the same time, the pressure stabilizing function of the compressed air filter pressure regulating valve 23 ensures that the air source pressure entering the pneumatic on-off valve is stable, which directly ensures that the on-off valve responds quickly and positions accurately when performing opening or closing actions, avoiding valve core oscillation or incomplete closing caused by pressure fluctuations. When the system needs to switch air sources, clean and pressure-stable compressed air enables the pneumatic on-off valve to quickly complete the action, providing a solid foundation for smooth and reliable non-disturbance switching between the steam main line and the compressed air bypass unit. The two work together to ensure the precision of the compressed air bypass switching-in and switching-off process and the long-term reliability of the equipment operation from the two dimensions of air source quality and power source stability. In some alternative embodiments, the pipe diameter of the compressed air pipeline is DN40, and the flow of compressed air can be manually adjusted through the compressed air filter pressure regulating valve 23.
[0054] In some embodiments, the compressed air bypass unit further comprises a second check valve 24 arranged downstream of the compressed air pneumatic on-off stop valve; and / or, the three-way piece 12 is a three-way regulating valve. It can be understood that the second check valve 24 is arranged in the compressed air bypass unit to enhance the sealing safety of the pipeline when the main steam is put into use, and completely eliminates the risk of reverse pollution of the medium to the compressed air pipeline. In some alternative embodiments, the three-way piece 12 is arranged as a three-way regulating valve to replace the check valve function, and of course, a three-way regulating valve and a second check valve 24 can be arranged simultaneously to achieve redundant design and fully ensure the independence of the compressed air pipeline and the steam pipeline.
[0055] In some embodiments, a temperature sensor 5 is arranged at the pipeline between the gas outlet of the electric heater 4 and the steam inlet of the SIROX expander. It can be understood that the temperature sensor 5 can directly and real-timely monitor the real temperature of the medium about to enter the process equipment, providing the most direct and reliable basis for the PID power adjustment of the electric heater 4, realizing closed-loop control, and thus being able to dynamically maintain the compressed air preheating temperature above the process lower limit of 120℃, and ensuring that the steam is stably overheated above 10℃ above the saturation temperature under the current pressure, thereby effectively inhibiting the generation of condensed water of the steam in the process of transportation and use. The setting of the heated steam temperature can be 10℃ higher than the temperature in the corresponding table by referring to the working saturated steam pressure and temperature corresponding table. Not only does it ensure the accuracy and stability of the process conditions required for the tobacco expansion in the SIROX expander, significantly improving product quality, but also avoids over-consumption of energy, achieving a balance between heating efficiency and process effect. Moreover, the on-site display function of the temperature sensor 5 further provides an intuitive temperature monitoring means for the operator, greatly facilitating on-site inspection and process state confirmation.
[0056] The present application also provides a control method of the device for tobacco expansion processing, for controlling the device for tobacco expansion processing as described above, and the control method of the device for tobacco expansion processing comprises the following steps: S1, before the production of the temperature and humidity increasing device, preheating the inside of the temperature and humidity increasing device by using the compressed air bypass unit and the electric heating unit; S2, after the preheating of the inside of the temperature and humidity increasing device reaches the set time and the tobacco reaches the temperature and humidity increasing device, supplying steam to the temperature and humidity increasing device by using the steam main unit and the electric heating unit. It can be understood that the control method converts the preheating capacity of the hardware system into a stable and reliable automatic process by setting a clear preheating and production two-stage process. In the preheating stage, the method uses compressed air for preheating, which not only eliminates the generation of condensed water of steam in this stage by physical means, but also ensures that the equipment can reach and maintain the best production preparation state through precise timing control, laying a solid foundation for subsequent high-quality production. In the production stage, when the preheating time reaches the set time and the tobacco reaches the temperature and humidity increasing device, this key signal is automatically switched to the steam mode, and the PID adjustment function of the integrated electric heater 4 is used to ensure the overheat degree of the output steam in real time, thereby continuously inhibiting the formation of condensed water in the production process; this intelligent switching logic based on conditional triggering, combined with interlocking control of valves, not only ensures the seamless and safe transition of process media, but also realizes precise management of steam dryness. From the system control level, the method simplifies the complex equipment cooperation, medium switching and temperature control into an automatic, coherent and reliable process, and synchronously achieves the comprehensive benefits of improving product quality, ensuring equipment safety and optimizing energy utilization without manual intervention.
[0057] In some embodiments, step S1 comprises:
[0058] The steam control regulating valve 11 of the steam main unit is closed, the compressed air automatic switch valve 22 of the compressed air bypass unit is opened, and the electric heater 4 of the electric heating unit is opened, so that the compressed air enters and is heated by the electric heater 4 and then enters the temperature and humidity increasing device.
[0059] It can be understood that the compressed air is heated to a set temperature by the opened pipeline and enters the temperature and humidity increasing device in a high-temperature dry state to complete preheating. This step uses the heated dry compressed air to replace traditional steam for preheating by a medium replacement method, effectively avoids the generation of condensed water during preheating, and ensures the stability and reliability of the preheating process through programmed control, thereby creating an ideal dry equipment environment for subsequent production processes.
[0060] In some embodiments, step S2 comprises:
[0061] When the preheating reaches the set time and the tobacco reaches the temperature and humidity increasing device, the compressed air automatic switch valve 22 of the compressed air bypass unit is closed, and the steam control regulating valve 11 of the steam main unit is opened, so that the steam enters and is heated by the electric heater 4 of the electric heating unit and then enters the temperature and humidity increasing device.
[0062] It can be understood that through the dual judgment based on time sequence and material signal, precise and seamless switching between the two working media is realized, which ensures that the equipment is at the best process temperature at the beginning of production, avoids the unstable quality of the initial batch of products caused by insufficient preheating of the equipment or condensation of steam in the traditional way, thereby ensuring the continuity and stability of the tobacco processing process, and effectively improving the automation and operation reliability of the entire system. In other embodiments, the switching time can be determined according to the preset time or the material signal alone. It can be understood that under normal conditions, the preset time should be synchronized with the material signal.
[0063] In some embodiments, after step S2, it further comprises:
[0064] S3, when the tobacco processing is completed, the steam control regulating valve 11 of the steam main unit is closed, the compressed air automatic switch valve 22 of the compressed air bypass unit is kept closed, and the electric heating unit is powered off.
[0065] It can be understood that after the tobacco is passed, all the automatic valves are closed, specifically the steam control regulating valve 11 of the steam main unit is closed and the compressed air automatic switch valve 22 of the compressed air bypass unit is kept closed, and the power supply of the electric heating unit is cut off. Any possible medium leakage is fundamentally eliminated, which not only prevents continuous waste of energy, but also ensures absolute safety after the system is shut down. Secondly, the operation effectively avoids the waste of energy by timely stopping the unnecessary heating of the electric heater 4 to the air pipeline, realizes precise control of energy consumption. Moreover, by reducing the need for manual intervention, the operation is more standardized and safer, thereby maximizing energy efficiency while ensuring the service life of the equipment.
[0066] A further object of the present application is to provide a tobacco production line comprising the device for tobacco expansion treatment as described above. By integrating the full-automatic preheating and superheated steam control functions, the energy consumption and manual operation risk are effectively reduced while significantly improving the tobacco expansion efficiency and product quality consistency.
[0067] Obviously, the above embodiments of the present application are only examples for the purpose of clear illustration, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.
Claims
1. Apparatus for the expansion treatment of tobacco shreds, characterised in that, The steam main unit, the compressed air bypass unit, the electric heating unit and the temperature and humidity increasing device are connected in sequence. The steam control regulating valve (11) is connected with a steam source at one end away from the tee piece (12). The compressed air bypass unit comprises a compressed air manual switch valve (21) and a compressed air automatic switch valve (22) connected in sequence. The compressed air bypass unit is connected with the tee piece (12) at the outlet pipeline.
2. Apparatus for tobacco expansion treatment according to claim 1, characterised in that, The electric heater (4) is connected with the temperature and humidity increasing device at the outlet. The condensate discharge unit is connected with the electric heater (4) at the bottom.
3. Apparatus for tobacco expansion treatment according to claim 2, characterised in that, The condensate discharge unit comprises a steam condensate discharge automatic stop valve (31) and a trap (32) connected by pipelines.
4. Apparatus for tobacco expansion treatment according to claim 2, characterised in that, The condensate discharge unit further comprises a manual stop valve (33) and a filter (34) connected by pipelines and arranged between the steam condensate discharge automatic stop valve (31) and the trap (32).
5. The apparatus for tobacco expansion treatment according to claim 1, characterized in that, The condensate discharge unit further comprises a sight glass (35) and / or a first check valve (36) arranged on the pipeline downstream of the trap (32).
6. Apparatus for tobacco expansion treatment according to claim 1, characterised in that, The compressed air bypass unit further comprises a compressed air filter pressure regulating valve (23) arranged upstream of the compressed air automatic switch valve (22). The compressed air bypass unit further comprises a second check valve (24) arranged downstream of the compressed air pneumatic switch stop valve.
7. The apparatus for tobacco expansion treatment according to any one of claims 1 to 6, characterized in that, The tee piece (12) is a tee regulating valve.
8. Control method for an apparatus for the expansion treatment of tobacco shreds, characterized in that, A temperature sensor (5) is arranged on the pipeline between the outlet of the electric heater (4) and the steam inlet of the temperature and humidity increasing device. The control method of the device for tobacco expansion processing comprises the following steps: S1, before the temperature and humidity increasing device is produced, the temperature and humidity increasing device is preheated by the compressed air bypass unit and the electric heating unit; 9. The control method of the apparatus for tobacco expansion treatment according to claim 8, characterized in that, S2, after the temperature and humidity increasing device is preheated for a set time and the tobacco reaches the temperature and humidity increasing device, the temperature and humidity increasing device is supplied with steam by the steam main unit and the electric heating unit. The step S1 comprises: closing the steam control regulating valve (11) of the steam main unit, opening the compressed air automatic switch valve (22) of the compressed air bypass unit and the electric heater (4) of the electric heating unit, so that the compressed air enters and is heated by the electric heater (4) and then enters the temperature and humidity increasing device; and / or; the step S2 comprises: when the preheating reaches a set time and the tobacco reaches the temperature and humidity increasing device, closing the compressed air automatic switch valve (22) of the compressed air bypass unit and opening the steam control regulating valve (11) of the steam main unit, so that the steam enters and is heated by the electric heater (4) of the electric heating unit and then enters the temperature and humidity increasing device; and / or, after the step S2, further comprising: S3, when the tobacco processing is completed, closing the steam control regulating valve (11) of the steam main unit, keeping the compressed air automatic switch valve (22) of the compressed air bypass unit closed and the electric heating unit powered off.
10. A tobacco thread production line, characterised in that, The device for tobacco expansion processing according to any one of claims 1-7.