Tobacco strip redrying high-pressure atomization energy-saving moisture regaining method based on condensate water recovery

Abstract

The invention discloses a high-pressure atomization energy-saving moisture regaining method based on condensate water recovery for tobacco strip redrying. The method comprises the following steps: placing tobacco strips in mesh belt type re-drying equipment, and heating and re-drying the tobacco strips through steam; collecting condensed water formed by condensing after the steam releases heat; the condensate water is introduced into the tobacco strip moisture regaining process in a mist spraying mode, water mist is made to make uniform contact with the surfaces of the tobacco strips, and heating treatment is conducted while humidification treatment is conducted on the tobacco strips; and monitoring the environment humidity in the redrying and moisture regaining process of the tobacco lamina, and adjusting the humidifying intensity according to the humidity change, so that the environment humidity is maintained in a preset range. According to the technical scheme, through condensate water recovery, high-pressure atomization and intelligent humidity regulation and control methods, consumption of a large amount of steam and soft water in a traditional moisture regaining process is remarkably reduced, tobacco leaves are evenly humidified, the water content is stable, and the energy utilization rate and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco processing, and in particular to a tobacco strip redrying method based on condensed water recovery and high-pressure atomization energy-saving and moisture-recovery. Background Art

[0002] In the existing tobacco leaf redrying process, moisture reconditioning is an important step in ensuring tobacco leaf quality and storage safety. The traditional process mainly uses a soda-water mixed atomization method, which achieves humidification by mixing high-temperature steam with water and spraying it on the tobacco leaves. Its disadvantage is that it consumes a large amount of steam and soft water, and the thermal energy utilization rate is low, which can easily lead to uneven local humidity, condensed water dripping and energy waste. In addition, in order to improve the humidification effect, some processes also use ultrasonic assisted treatment, but it is still difficult to achieve precise humidity control and cannot fully meet the requirements for balanced and stable moisture content of tobacco leaves, which affects the subsequent storage and quality control of the product.

[0003] As an important link between tobacco production and the cigarette industry, the leaf threshing and redrying process plays a key role in transforming tobacco from agricultural products to industrial products. This process is mainly aimed at tobacco leaves after the initial baking of tobacco farmers. After further processing, the original tobacco leaves are converted into production materials that meet the requirements of the cigarette industry. The leaf threshing and redrying production process mainly includes four major processes: pretreatment, leaf stem separation, tobacco strip redrying, and finished product packaging. Among them, the tobacco strip redrying process is the core link. First, the tobacco strips after the leaf stems are separated are dried to kill the eggs and mold in the tobacco leaves, and remove the unfavorable odors such as green in the tobacco strips, thereby improving the tobacco taste; then the high-temperature tobacco strips after drying are cooled; finally, the moisture content of the tobacco leaves is restored from 8-10.5% to 11-13%, and the temperature is increased from 25-35℃ to about 50-60℃. The moisture content of the tobacco leaves is balanced and regulated, which is convenient for subsequent packaging and storage, and ensures the safety of the redry tobacco strips during storage and aging.

[0004] At present, the process of re-baking and rehumidifying tobacco leaves directly affects the quality of finished products and production energy consumption. The traditional method mainly adopts a combination of "steam heating and humidification, steam-water mixing nozzle humidification, high-pressure atomizing nozzle to control moisture, and top baking tube heating to prevent dripping". Specifically, the water mist generated by the steam-water mixing nozzle and the high-pressure atomizing nozzle provides a high-humidity environment for the rehumidification zone, and creates temperature conditions conducive to the moisture absorption of tobacco leaves by introducing steam to increase temperature. At the same time, the circulating fan guides the flow of high-temperature and high-humidity gas, thereby improving the rehumidification efficiency of the dried tobacco leaves. In order to prevent dripping from the top of the rehumidification zone, the traditional process also configures a steam baking tube and a dehumidification fan at the top of the rehumidification zone to discharge excess moisture and prevent condensation caused by oversaturation of humidity. However, the existing process mainly relies on the steam-water mixing method to atomize soft water during the atomization process, and the soft water is heated by instantaneous heat exchange to form a high-temperature steam and water mixture, and the water droplets are broken into tiny droplets by high-speed injection, thereby achieving an atomization effect. In order to ensure the quality of atomization, this method will inevitably consume a large amount of steam and soft water, resulting in a high overall energy consumption in the rehumidification zone. How to properly solve the above problems has become an urgent issue to be solved in the industry. Summary of the invention

[0005] The present invention provides a tobacco strip redrying method based on condensed water recovery and high-pressure atomization energy-saving moisture regain, which is used to achieve low energy consumption and balanced moisture regain through condensed water recovery and high-pressure atomization technology.

[0006] According to a first aspect of the present invention, a tobacco strip redrying and moisture-reinforcing energy-saving method is provided, the tobacco strip redrying and moisture-reinforcing energy-saving method comprising:

[0007] The tobacco strips are placed in a mesh belt type tobacco strip redrying device, and steam is heated by a steam radiator to heat and redry the tobacco strips;

[0008] Collect the condensed water formed by the condensation of steam from the steam radiator in the drying area;

[0009] The condensed water is introduced into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and the tobacco strips are humidified and heated at the same time;

[0010] Monitor the ambient temperature and humidity during the redrying and rehumidification process of tobacco strips, and adjust the heating and humidity intensity according to the humidity changes to maintain the ambient temperature and humidity within the predetermined range to achieve precise control of temperature and humidity.

[0011] In one embodiment, it includes:

[0012] introducing the condensed water into a condensed water collection pipeline;

[0013] The collected condensed water is stored in a heat-insulated water storage container for temporary storage;

[0014] The condensed water in the water storage container is filtered and purified to ensure that the recovered water quality meets the reuse requirements.

[0015] In one embodiment, it includes:

[0016] The condensed water is pressurized to a predetermined pressure by a high-pressure pump or compressed air;

[0017] The pressurized condensed water is atomized into fine water droplets through an atomizing nozzle;

[0018] The fine water droplets are sprayed onto the tobacco sheets, so that the water mist is evenly distributed on the surface of the tobacco sheets and is quickly absorbed.

[0019] In one embodiment, it includes:

[0020] The humidity of the tobacco rehumidification environment is detected in real time by using a humidity sensor;

[0021] Compare the detected humidity value with the preset target humidity value to obtain the humidity deviation;

[0022] The amount of humidification water is automatically adjusted according to the humidity deviation to keep the ambient humidity within the target humidity value range.

[0023] In one embodiment, the rehumidification process comprises:

[0024] The rehumidification process is divided into a front humidification stage and a rear balancing stage. In the front humidification stage, the tobacco strips are quickly humidified with a relatively high ambient humidity so that the moisture content of the tobacco strips approaches a predetermined level in a short time.

[0025] In the latter equalization stage, the method of isohumidification and temperature increase is adopted to stabilize the final moisture content of the tobacco strips and to evenly distribute the moisture in the tobacco strips.

[0026] In one embodiment, it further includes:

[0027] Use the humidity monitoring system to obtain the environmental humidity data in the rehumidification area in real time;

[0028] According to the humidity data, the output parameters of the high-pressure spray system are dynamically adjusted by an automatic control device, wherein the output parameters include any one or more of the water pressure and the nozzle opening state, and the dynamic adjustment is performed according to the following formula:

[0029]

[0030] Among them, Q is the output water flow of the current high-pressure spray system, Q0 is the reference water flow, K h is the humidity compensation coefficient, H set is the preset target ambient humidity, H mis the real-time detected ambient humidity, P is the actual water pressure of the current high-pressure spray system, and P set is the preset water pressure, N is the current nozzle opening state, and Nset is the preset nozzle opening state;

[0031] According to the adjustment results, the water mist particle size and spray volume are optimized to meet the humidification needs of different rehumidification stages, thereby further reducing energy consumption and ensuring the balance of tobacco humidification.

[0032] According to a second aspect of the present invention, there is provided a tobacco strip redrying and moisture-reinforcing energy-saving device, comprising:

[0033] The redrying module is used to place the tobacco strips in the mesh belt type redrying equipment and heat and dry the tobacco strips by steam;

[0034] A collection module, used to collect condensed water formed by condensation of steam after heat release;

[0035] A spray module, used to introduce the condensed water into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and humidifies the tobacco strips while heating them;

[0036] The regulation module is used to monitor the ambient temperature and humidity during the redrying and rehumidification process of the tobacco strips, and adjust the heating and humidity intensity according to the humidity changes to maintain the ambient temperature and humidity within a predetermined range to achieve precise control of the temperature and humidity.

[0037] According to a third aspect of the present invention, there is provided an electronic device, the electronic device comprising: a communication interface, a processor, and a memory;

[0038] The memory is used to store program instructions, and when the program instructions are executed by the processor that is communicatively connected to the memory via the communication interface, any of the above-mentioned methods for energy-saving by redrying and moisturizing tobacco strips is implemented.

[0039] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a computer (e.g., a processor in the computer), implements any of the above-mentioned methods for energy-saving by redrying and rehumidifying tobacco strips.

[0040] In summary, the present invention provides an energy-saving method and device for redrying and rehumidifying tobacco strips, the method comprising: placing tobacco strips in a mesh belt type redrying device, heating and drying the tobacco strips with steam; collecting condensed water formed by condensation after the steam releases heat; introducing the condensed water into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and humidifies the tobacco strips while heating them; monitoring the ambient temperature and humidity during the redrying and rehumidification process of the tobacco strips, and adjusting the heating and humidity intensity according to the humidity changes, so that the ambient temperature and humidity are maintained within a predetermined range. The technical solution of the present application significantly reduces the consumption of a large amount of steam and soft water in the traditional rehumidification process through condensed water recovery, high-pressure atomization and intelligent humidity control methods, and realizes uniform humidification of tobacco leaves and stable moisture content. Through high-efficiency filtration, multi-level partition control and real-time dynamic adjustment technology, the ambient humidity is always kept within the preset range, effectively preventing local over-humidification and condensation dripping, and improving energy utilization and product quality.

[0041] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0042] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A flowchart of a tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0045] Figure 2 A flow chart of another tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0046] Figure 3 A flow chart of another tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0047] Figure 4 A flow chart of another tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0048] Figure 5 A flow chart of another tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0049] Figure 6 A flow chart of another tobacco strip redrying and moisture-reinforcing energy-saving method provided by an embodiment of the present invention;

[0050] Figure 7 A structural diagram of a tobacco strip redrying and moisture-reinforcing energy-saving device provided in an embodiment of the present invention;

[0051] Figure 8 A structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] like Figure 1 As shown, the present invention provides a tobacco strip redrying and moisture-reinforcing energy-saving method, and the tobacco strip redrying and moisture-reinforcing energy-saving method comprises:

[0055] In step S11, the tobacco strips are placed in a mesh belt type redrying device and heated and dried by steam;

[0056] In step S12, condensed water formed by condensation of steam after heat release is collected;

[0057] In step S13, the condensed water is introduced into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and the tobacco strips are humidified and heated at the same time;

[0058] In step S14, the ambient temperature and humidity during the redrying and rehumidification process of the tobacco strips are monitored, and the heating and humidification intensity is adjusted according to the humidity change to maintain the ambient temperature and humidity within a predetermined range to achieve precise control of the temperature and humidity.

[0059] In one embodiment, the tobacco strips are placed in a mesh belt type re-drying device, and the tobacco strips are heated and dried using high-temperature steam. The re-drying device is provided with uniformly distributed steam nozzles, which can make the steam act evenly on the surface of the tobacco strips, quickly increase the temperature of the tobacco leaves, kill bacteria, insect eggs and mold, and remove the green smell in the tobacco leaves that is not conducive to tasting. In order to ensure uniform heat transfer, a guide plate or air duct can be set in the re-drying device to guide the steam to form a stable and continuous heating airflow. For example, if a continuous feeding re-drying machine is used, a temperature control system can be set at the entrance to ensure that the temperature of the tobacco strips is uniform before entering the re-drying area, ensuring that the moisture control in the subsequent process has stable initial conditions. This step not only improves the drying uniformity of the tobacco leaves, but also provides an ideal physical basis for the subsequent rehumidification step.

[0060] During the steam heating process, part of the steam condenses to form condensed water due to the decrease in temperature after releasing heat. The temperature of the condensed water is between 98-101°C. Because the condensed water comes from high-temperature steam, it usually has a high temperature and contains certain dissolved impurities, such as iron filings falling off the inner wall of the pipe. To this end, the collected condensed water is purified by a multi-stage filtration system. Specifically, the condensed water passes through a pre-designed filter water tank, which is sequentially provided with filter media such as ceramic filter particles, activated carbon, quartz sand and 800 mesh stainless steel, which play the role of coarse filtration, adsorption and fine filtration respectively. The impurity content of the treated condensed water is significantly reduced, which can meet the requirements of water quality in the subsequent humidification process. In addition, the condensed water still retains some heat energy after treatment, which is convenient for reducing additional heating energy consumption during subsequent spray humidification. By real-time monitoring of the temperature and flow of the condensed water, the system can dynamically adjust the filtration process to ensure stable water quality and achieve full utilization of heat energy.

[0061] After the above purification treatment, the obtained condensed water is introduced into the high-pressure atomization system as a rehumidification humidification medium. The system mainly includes a high-temperature resistant high-pressure water pump, a plurality of high-precision atomization nozzles and a corresponding control unit. The water pump pressurizes the condensed water to above 1.0MPa, and the nozzle is designed to ensure that its aperture does not exceed 0.8mm to ensure that the particle size of the water droplets after atomization is small enough to achieve uniform distribution of water mist on the surface of the tobacco leaves. The output parameters of the spray system (including water pressure, number of nozzles and opening state) can be adjusted according to the preset process requirements. In order to further improve the atomization effect, an auxiliary fan can also be used to mix the spray droplets with the ambient airflow to form a stable high-humidity environment, which prompts the tobacco leaf surface to absorb moisture quickly. In actual operation, the spray time and water flow are controlled by preset parameters to ensure that the humidification effect of each batch of tobacco leaves is consistent during the rehumidification process.

[0062] In order to achieve precise control of the ambient humidity during the rehumidification process, the present invention introduces an intelligent humidity monitoring and automatic adjustment system in the mesh belt type redrying equipment. The system uses multiple humidity sensors to monitor the ambient humidity in the rehumidification zone in real time, and collects information such as water pressure and the opening status of the nozzle. The control unit dynamically adjusts the high-pressure atomization system according to the preset target humidity. According to the difference between the real-time ambient humidity and the preset target, the output of the spray system is automatically adjusted to ensure that the humidity in the rehumidification area is always maintained within the optimal range, thereby achieving precise control of the balanced moisture absorption of the tobacco leaves. For example, under a certain working condition, if the humidity is detected to be lower than the target value, the system will automatically increase the water pump output pressure or enable more nozzles to increase the humidification amount; otherwise, the spray amount is reduced to prevent excessive humidity from causing local condensation.

[0063] In the front humidification area, the tobacco leaves initially enter the rehumidification state. At this time, the moisture content is low, and a higher target humidity (e.g. 80% to 95%) is set, and the moisture is quickly replenished through the high-pressure atomization system; in the back balance area, the moisture content of the tobacco leaves is basically close to the predetermined value, so the humidification intensity is appropriately reduced, and the temperature is kept slightly elevated (e.g. 53°C to 57°C) to enhance the hygroscopic performance of the tobacco leaves and the balanced distribution of internal moisture. Independent humidity sensors and temperature sensors are arranged in each partition, which are fed back to the central control system in real time through the data acquisition module. The central system then adjusts the spray volume, fan speed and the degree of opening of the dehumidification device according to the real-time data of each area. This multi-stage partition control method can effectively solve the problem of local over-humidification or uneven rehumidification caused by uneven humidity distribution in the traditional single humidification process, and further reduce the overall energy consumption of the system.

[0064] The system uses an embedded controller to interconnect data with various sensors and actuators through industrial Ethernet or wireless communication. The algorithm module built into the controller not only realizes dynamic adjustment, but also predicts and optimizes the humidification process in combination with historical data. For example, when humidity fluctuations are detected for many consecutive times, the system can start the early warning program in advance and automatically adjust the operating frequency of the water pump and the speed of the fan to ensure a smooth rehumidification process. In order to facilitate operators to understand the process status in real time, the system can also be equipped with a host computer display module to intuitively display the temperature, humidity, water flow, pressure and other parameters of each partition, so that operators can make necessary manual interventions or parameter adjustments based on this. Taking a redrying plant as an example, when it uses the traditional rehumidification process, the moisture content of tobacco leaves fluctuates widely due to inaccurate humidity control. On average, 2.7 tons of steam are consumed per hour during the rehumidification process, and about 2.1 tons of soft water are consumed per hour, and the process energy consumption remains high. After adopting the technology of the present invention, by recycling condensed water and high-pressure atomization to replace part of the steam heating, reducing the amount of moisture discharge through parameter adjustment, achieving less addition and less discharge, and introducing intelligent control to achieve dynamic adjustment, the experiment shows that the steam consumption in the rehumidification zone can be reduced to 0.9 tons / hour, while the moisture content of tobacco leaves is stable at 11% to 13%, and there is no dripping phenomenon, and the process energy saving effect is significant. The above examples not only verify the advantages of the present invention in energy saving and consumption reduction, but also illustrate the feasibility and practical application value of improving the rehumidification quality of tobacco leaves through precise humidity control.

[0065] Compared with the traditional rehumidification process which mainly adopts steam-water mixed atomization, the present invention provides a rehumidification energy-saving method based on the recovery of condensed water from tobacco leaf redrying and high-pressure atomization. The high-quality condensed water produced in the drying area is recovered to the rehumidification area, and the condensed water is directly atomized into fine water droplets using a high-temperature resistant high-pressure atomization pump, thereby providing an ideal temperature and humidity environment for the rehumidification area, and the temperature is adjusted by a steam nozzle. The tobacco leaf redrying of the present invention adopts a conventional mesh belt box structure tobacco leaf drying machine in the prior art, and its structure includes a drying area, a cooling area and a rehumidification area.

[0066] In the drying area, the condensed water generated during the re-baking process is used, and its temperature is about 100°C. However, since there may be large impurities such as iron slag and iron filings in the pipeline, a graded filter water tank is set in this area. The filter water tank is placed with ceramic filter particles, activated carbon and quartz sand in the bottom, middle and upper layers respectively, which can effectively filter impurities with a diameter greater than 0.5mm in the condensed water to ensure that the water quality after filtration meets the reuse requirements. The filtered condensed water is introduced into the atomized water supply tank in the rehumidification area through a special transmission pipeline for standby use to ensure the quality and temperature stability of the water source required for the rehumidification process.

[0067] In the rehumidification zone, a high-temperature resistant high-pressure atomizing pump is used to directly atomize the recovered condensed water in the water supply tank. In the high-pressure atomizing system, all nozzles are selected with a diameter not greater than 0.8mm, and the atomized water mist particle size is fine and evenly distributed by adjusting the water pump pressure (not less than 1.0MPa, adjustable to a maximum of 7.0MPa) and the nozzle opening state. The humidity in the rehumidification zone is mainly adjusted by the amount of atomized water, and the temperature is supplemented by the steam nozzle. When the temperature of the atomized condensed water is lower than the process requirements, an appropriate amount of steam can be directly added to the rehumidification area for temperature control, thereby ensuring that the overall environmental temperature and humidity are always maintained within the predetermined range.

[0068] In order to achieve a balanced rehumidification effect, the present invention divides the rehumidification zone into three sections: rehumidification zone 1, rehumidification zone 2 and rehumidification zone 3. Specifically, rehumidification zone 1 adopts an upper air intake circulation mode, and the environmental humidity before the material is controlled at 80% to 95%, and the temperature is controlled at 50°C to 55°; rehumidification zone 2 adopts a lower air intake circulation mode, and the environmental humidity after the material is controlled at 55% to 70%, and the temperature is controlled at 53°C to 57°; rehumidification zone 3 also adopts a lower air intake circulation mode, which is mainly used to ensure that the moisture content of the tobacco leaves is balanced, and the environmental humidity after the material is controlled at 55% to 70%, and the temperature is controlled at 55°C to 60°. In order to ensure that the tobacco leaves fully absorb moisture, the temperatures of the three rehumidification zones are set in order from low to high, so as to achieve gradual humidification and balanced regulation.

[0069] The technical solution in this embodiment is to recover the condensed water generated in the drying area after graded filtration, and directly atomize it into the rehumidification zone using a high-pressure atomizing pump, and then use a steam nozzle for temperature control, thus forming a new type of condensed water recovery atomization energy-saving rehumidification process for redrying tobacco strips. This method not only avoids the problem of consuming a large amount of steam due to liquid water atomization in the traditional steam-water mixed atomization method, but also uses condensed water instead of normal temperature soft water for atomization, thereby improving resource utilization and effectively reducing production costs. It has been verified by practical application that after adopting the technology of the present invention, the steam consumption in the rehumidification zone can be reduced to 0.9t / h, while ensuring that the humidity in the rehumidification zone is always controlled within a reasonable range, avoiding condensed water dripping due to humidity oversaturation, ensuring the stability of tobacco leaf quality, and the process effect is significant. Through condensed water recovery, high-pressure atomization and intelligent humidity control methods, the consumption of a large amount of steam and soft water in the traditional rehumidification process is significantly reduced, and the tobacco leaf humidification is uniform and the moisture content is stable. Through high-efficiency filtration, multi-level partition control and real-time dynamic adjustment technology, the ambient humidity is always kept within the preset range, effectively preventing local over-humidity and condensation dripping, improving energy utilization and product quality, while meeting green environmental protection requirements and achieving outstanding energy-saving and consumption-reducing effects.

[0070] In one embodiment, Figure 2 As shown, the following steps S21-S23 are also included:

[0071] In step S21, the condensed water is introduced into a condensed water collection pipeline;

[0072] In step S22, the collected condensed water is stored in a heat-insulated water storage container for temporary storage;

[0073] In step S23, the condensed water in the water storage container is filtered and purified to ensure that the quality of the recovered water meets the reuse requirements.

[0074] In one embodiment, condensed water is introduced into a condensed water collection pipeline, the collected condensed water is stored in an insulated water storage container for temporary storage, and the condensed water in the water storage container is filtered and purified to ensure that the recovered water quality meets the subsequent reuse requirements.

[0075] During the redrying process, after the tobacco leaves are heated with steam, part of the steam condenses into water due to heat exchange and heat release. In order to make full use of this heat energy and water resources, a specially designed condensate water introduction system is used. The system includes multiple water inlets and dedicated condensate water collection pipelines. The material with the inner wall of the pipeline treated with an anti-corrosion coating is used to ensure that the condensate water is not contaminated by impurities and metal ions in the pipeline during transmission. Flow sensors and temperature monitoring devices are installed in the pipeline to record the flow and temperature information of the condensate water in real time, providing data support for subsequent process control. For example, in a continuous redrying production line, condensate water is collected from the end of each steam heater and automatically distributed to different collection pipelines according to the pressure and temperature differences through pre-set guide valves, ensuring that the condensate water in each section of the pipeline can be discharged on time and finally introduced into the main collection pipeline.

[0076] After being introduced into the main collection pipeline, the condensed water will be transported to the insulated water storage container for temporary storage. The insulated water storage container adopts a double-layer vacuum structure or a thermal insulation material coating design, which can effectively reduce the loss of water temperature during storage and keep the condensed water at a higher temperature, thereby reducing the demand for external energy in the subsequent humidification process. An automatic liquid level monitoring device and a temperature sensor are also provided inside the container to monitor the storage water volume and water temperature in real time to ensure the stability of the system operation. In order to improve the automation level of the system, the water storage container is also connected to the central control system. When it is detected that the water storage volume is insufficient or the water temperature is lower than the preset value, the system can automatically start the backup water circuit or preheating device for compensation. Taking the actual application of a certain tobacco factory as an example, the design capacity of the water storage container can reach hundreds of liters, and through program setting, when the water storage level is lower than the set value, part of the condensed water recovery path of the re-drying machine is automatically closed to ensure the continuity and efficiency of the system operation.

[0077] After the water storage is completed, the next key step is to filter and purify the condensed water in the water storage container. In order to ensure that the recovered water quality meets the reuse requirements, the present invention adopts a multi-stage filtration device. First, the water outlet of the water storage container is connected to the primary filter, which uses a stainless steel filter screen or ceramic filter particles, mainly used to remove large particles of suspended impurities, such as iron filings or other solid particles falling off the pipe. After the primary filtration, the water flows into the intermediate filter, which is filled with activated carbon, which can absorb some organic pollutants and odors in the water, further improving the water quality. Finally, the water flows through the fine filtration unit, which often uses a high-precision quartz sand filter layer to thoroughly intercept the remaining tiny particles and soluble impurities to ensure that the water quality meets the reuse standards. In this filtration process, each level of the filtration device is provided with an automatic backwashing function to ensure that the filtration effect can be maintained after a long period of operation, reducing maintenance costs.

[0078] Each filter module is connected by an automatic control valve. When a filter unit is detected to be blocked or the filtering effect is reduced, the standby filter module can be automatically started or the backwashing procedure can be implemented to ensure the continuity and stability of the entire filtering process. In order to better adapt to the changes in the production line, the entire condensate recovery and filtration system is linked with the control system of the re-drying machine. When the amount of condensate is large, the operating rate of the filtration process can be automatically adjusted; when the load is low, it maintains a low-speed stable operation to avoid affecting the water purification effect due to excessive filtration speed.

[0079] This embodiment achieves efficient recovery and utilization of condensed water generated in the redrying process by introducing the condensed water into an insulated water storage container through an anti-corrosion collection pipeline and adopting multi-stage filtration and purification treatment. This technical solution not only improves resource utilization and reduces production energy consumption, but also ensures that the humidification water quality used in the rehumidification process meets high standards, thereby effectively improving the uniformity of tobacco leaf rehumidification and the quality of the final product. The above steps and system configurations can be optimized and adjusted according to actual production needs, and the design and parameter settings of each functional module can be modified and replaced without departing from the basic concept of the present invention.

[0080] In one embodiment, Figure 3 As shown, the following steps S31-S33 are also included:

[0081] In step S31, the condensed water is pressurized to a predetermined pressure by a high-pressure pump or compressed air;

[0082] In step S32, the pressurized condensed water is atomized into fine water droplets through an atomizing nozzle;

[0083] In step S33, the fine water droplets are sprayed onto the tobacco sheet so that the water mist is evenly distributed on the surface of the tobacco sheet and is quickly absorbed.

[0084] In one embodiment, the detailed implementation steps of introducing condensed water in the form of a spray into the tobacco leaf rehumidification process are as follows to achieve uniform distribution and rapid absorption of water mist on the surface of tobacco leaves, thereby improving rehumidification efficiency, reducing energy consumption, and ensuring balanced moisture content of tobacco leaves.

[0085] In the re-baking process, the condensed water generated in the drying zone has a certain temperature and heat energy, but there are problems such as unstable flow and large spray particle size when used directly. Therefore, this embodiment uses a high-pressure pump or a compressed air device to pressurize the condensed water.

[0086] The condensed water is pressurized to a predetermined pressure using a high-pressure pump or compressed air. The pressure is usually required to be no less than 1.0MPa and can be adjusted to within 7.0MPa as needed. During the pressurization process, the anti-corrosion coating on the inner wall of the pipeline and the flow control valve ensure a smooth water flow to prevent intermittent water flow due to pressure fluctuations, thereby ensuring the consistency of the subsequent spray effect. For example, on a certain tobacco factory production line, the high-pressure pump is equipped with a variable frequency regulation function, which can automatically adjust the water pressure according to the real-time monitoring of the spray feedback to ensure that the system always works within the preset ideal pressure range.

[0087] The condensed water after the pressurized treatment enters the atomization chamber through the atomizing nozzle for micronization. The atomizing nozzle here adopts a high-precision design, and its nozzle aperture is generally controlled within 0.8mm to ensure that the pressurized water flow quickly breaks away from the fluid continuity at the nozzle outlet and forms a large number of fine water droplets. The high-pressure water flow is affected by the rapid flow rate in the atomizing nozzle. Due to the friction of the inner wall and the shear effect of the fluid, the water flow is broken into fine water droplets with a diameter ranging from tens of microns to hundreds of microns; at the same time, the nozzle structure is designed to be porous or rotating, so that the atomized water droplets are evenly dispersed, which is conducive to forming a uniform water mist environment in the rehumidification area; to further optimize the atomization effect, this embodiment can also use an auxiliary air duct to introduce local air flow into the nozzle outlet to accelerate the dispersion of water droplets and prevent local over-wetting or dripping due to excessively large water droplets. For example, the two-stage atomization technology is used, which first uses the main nozzle to atomize, and then the auxiliary fan performs a secondary refinement on the initially atomized water droplets, making the water mist particle size more uniform, the spray distance and coverage area larger, and ensuring that the surface of the tobacco leaves is evenly wetted.

[0088] The atomized fine water droplets are evenly sprayed onto the surface of the tobacco leaves through the spray device. This step plays a key role in the rehumidification effect. Using a spray system specially installed in the rehumidification area, the formed water mist is sprayed onto the tobacco leaves in a uniform and fine state; through the carefully designed spray angle and spray distance, it is ensured that the water mist can cover all parts of the tobacco leaves and quickly penetrate into the interior of the tobacco leaves to achieve rapid absorption; the spray process works in coordination with the circulating fan in the rehumidification area to promote the formation of a closed-loop transmission in the local high humidity environment, further improving the efficiency of uniform water distribution. In practical applications, by adjusting the spray angle and operating time of the spray system, the tobacco leaves can obtain sufficient moisture in the rehumidification process, and avoid dripping caused by excessive local moisture, ensuring that the final moisture content of the tobacco leaves is stable within the ideal range of 11% to 13%.

[0089] In order to achieve precise linkage of the above steps, built-in sensors monitor the temperature, humidity and working status of the spray system in the rehumidification zone in real time, and dynamically adjust the working frequency of the high-pressure pump, the nozzle opening status and the auxiliary fan speed through data feedback. For example, when the humidity in the rehumidification zone is lower than the preset target value, the system automatically increases the output of the high-pressure pump or enables more nozzles to increase the amount of water mist; conversely, the spray intensity is reduced to avoid over-humidification. Through this closed-loop control method, the entire rehumidification process is always in the best state. In addition, it also has an alarm function. When abnormal water pressure or uneven spray is detected, the operator is notified in time to make adjustments or maintenance, thereby ensuring the long-term stable operation of the system.

[0090] Taking a tobacco enterprise as an example, after adopting the technology of this embodiment, the problem of high steam consumption caused by steam-water mixed atomization in its traditional rehumidification process has been effectively solved. Through the synergistic effect of the high-pressure pump and the high-precision atomizing nozzle, the water mist in the rehumidification zone is evenly covered, the rehumidification speed of tobacco leaves is significantly improved, and the steam consumption in the rehumidification zone is reduced from the traditional 2.7 tons / hour to 0.9 tons / hour. The experimental results show that after adopting this method, the moisture content of tobacco leaves after rehumidification fluctuates and is controlled between 11% and 13%, and no dripping occurs, and the product quality and storage safety are significantly improved.

[0091] The present invention introduces condensed water into the tobacco leaf rehumidification process in the form of high-pressure atomization, thereby achieving the goal of spraying water mist to evenly cover the surface of tobacco leaves and be quickly absorbed. This not only optimizes the problem of high energy consumption in traditional processes, but also improves the balance and stability of tobacco leaf rehumidification.

[0092] In one embodiment, Figure 4 As shown, the following steps S41-S43 are also included:

[0093] In step S41, the humidity of the tobacco rehumidification environment is detected in real time by a humidity sensor;

[0094] In step S42, the detected humidity value is compared with a preset target humidity value to obtain a humidity deviation;

[0095] In step S43, the amount of humidification water is automatically adjusted according to the humidity deviation so that the ambient humidity is maintained within the target humidity value range.

[0096] In one embodiment, a closed-loop control system using a humidity sensor for real-time detection, data comparison, and automatic adjustment of the amount of humidification water is proposed for precise control of ambient temperature and humidity during the rehumidification process of tobacco strips. The system mainly includes a humidity detection unit, a data processing unit, and an execution unit. By continuously monitoring the humidity in the rehumidification zone, the deviation from the preset target humidity is obtained in a timely manner, and the amount of condensed water spray humidification is automatically adjusted accordingly to ensure that the ambient humidity is always maintained within the ideal range, thereby achieving balanced regulation of the moisture content of tobacco strips and reducing energy consumption.

[0097] There are multiple humidity sensors arranged in the rehumidification zone. These sensors are evenly distributed in the tobacco leaf accumulation area, and transmit real-time humidity data to the central controller through wireless or wired connections. The humidity sensor can not only accurately detect the relative humidity of the current rehumidification zone, but also provide temperature data to provide a reference for subsequent regulation. After preliminary filtering, the sensor data is centrally analyzed by the data processing unit. The data processing unit compares the actual humidity value Hmeasured detected with the preset target humidity value Hset, and calculates the humidity deviation ΔH=Hset-Hmeasured. When the humidity deviation is a positive value, it means that the humidity in the rehumidification zone is lower than the target value; otherwise, it means that the humidity is too high.

[0098] The data processing unit determines the corresponding humidification adjustment amount through a preset control algorithm according to the size of the humidity deviation. The algorithm can be expressed as:

[0099] Q=Q0×[1+K h (H set -H measured )]

[0100] Among them, Q is the current humidification water volume, Q0 is the reference water volume, K h is the humidity compensation coefficient. According to this formula, when the actual humidity is lower than the preset value, Hset-Hmeasured is positive, and the control system will increase the spray water volume; otherwise, it will reduce the spray water volume to achieve the purpose of stable control of environmental humidity. Here, the reference water volume Q0 and the compensation coefficient K h All can be debugged and set according to actual working conditions to ensure that the system responds quickly and adjusts smoothly.

[0101] The execution unit mainly includes a high-pressure atomizing pump, an atomizing nozzle and an auxiliary control valve. According to the humidification instruction output by the data processing unit, the execution unit automatically adjusts the operating parameters of the high-pressure pump, thereby changing the water flow output through the atomizing nozzle. The nozzle outlet is designed to have a fixed aperture (generally not more than 1.0mm) to ensure that the water mist particle size is small and evenly distributed. In order to avoid humidity fluctuations caused by the delayed response of the spray system, the system can also be equipped with an auxiliary fan to further promote the full contact and uniform distribution of the water mist and the tobacco leaves by guiding the air flow in the rehumidification area.

[0102] In order to ensure the stable operation of the system, a redundant design is adopted, the humidity sensor is set up with multi-point monitoring, and local errors are eliminated through data fusion technology. The central controller can perform statistical processing on multiple continuous sampling points to ensure data accuracy; at the same time, the system is also equipped with an alarm module. When abnormal humidity is detected or the execution unit responds abnormally, an alarm is issued in time to notify the operator to perform inspection and maintenance. Through the above closed-loop control system, the ambient humidity can be adjusted in real time and dynamically during the entire rehumidification process, so that the water mist can evenly cover the surface of the tobacco leaves, ensuring that the tobacco leaves absorb moisture evenly during the rehumidification process. Compared with the traditional method that relies on a fixed amount of spray water, the present invention significantly improves the accuracy and energy-saving effect of the rehumidification process, which not only reduces the energy consumption caused by insufficient or excessive humidification, but also avoids product quality fluctuations caused by uneven humidity. Practical applications show that the steam consumption of tobacco leaf rehumidification is greatly reduced, while ensuring that the humidity in the rehumidification zone is stable within the preset range, effectively improving the quality of tobacco leaves and the overall benefits of the redrying process.

[0103] This embodiment describes in detail the specific implementation steps and control logic of real-time monitoring, data comparison and automatic adjustment of humidification water volume through humidity sensors, which fully demonstrates the significant advantages of the present invention in accurately controlling ambient humidity, achieving balanced humidification and energy saving and consumption reduction during the rehumidification process.

[0104] In one embodiment, Figure 5 As shown, the following steps S51-S52 are also included:

[0105] In step S51, the rehumidification process is divided into a front humidification stage and a rear balancing stage. In the front humidification stage, the tobacco strips are quickly humidified with a higher ambient humidity so that the moisture content of the tobacco strips approaches a predetermined level in a short time.

[0106] In step S52, in the latter equalization stage, the isohumidity heating method is adopted to stabilize the final moisture content of the tobacco strips and to evenly distribute the moisture in the tobacco strips.

[0107] In one embodiment, a segmented control method is proposed to solve the humidification and balance problems during the rehumidification process, which divides the rehumidification process into a front humidification stage and a rear balance stage. Considering the low initial moisture content of tobacco leaves after redrying, the fast moisture absorption rate, and the subsequent requirement for balanced moisture distribution, the rapid increase and balanced and stable control of the moisture content of tobacco leaves are achieved through the organic connection of the front and back stages, thereby ensuring the stable quality and safe storage of tobacco leaves after redrying.

[0108] In the front humidification stage, the process focuses on using a higher ambient humidity to quickly humidify the tobacco leaves so that their moisture content quickly approaches the predetermined level in a short time. To this end, this embodiment pre-sets a higher target humidity in the rehumidification zone, for example, the ambient humidity can be set to 80% to 95%, while maintaining the temperature in the range of 50°C to 55°C. The ambient humidity is monitored in real time by multiple humidity sensors arranged in the rehumidification zone, and compared with the preset target humidity to ensure accurate feedback of humidity data during the humidification process. The condensed water is pressurized and atomized into fine water droplets by a high-pressure atomization system, and evenly sprayed on the surface of the tobacco leaves through the atomization nozzle, so that the water mist quickly covers the tobacco leaves and forms a layer of high humidity environment on the surface of the tobacco leaves. In the front humidification process, the method of increasing the spray water volume and shortening the atomization interval is adopted to achieve rapid water transfer, so that the tobacco leaves absorb enough water in a short time, and the moisture content quickly approaches the predetermined value. For example, in a practical application, a high-pressure pump is used to pressurize the recovered condensed water to about 2.0MPa. After atomization, the operation time in the front humidification stage is short, which can quickly increase the moisture content of the tobacco from the initial 8% to 10% to about 10.5% to 11%. The key to control is to achieve rapid humidification, but at the same time, it is necessary to avoid dripping due to excessive local humidity caused by too fast humidification. Therefore, in the front humidification stage, the control system strictly controls the spray water volume and spray time, and uses a circulating fan to evenly distribute the high-humidity airflow in the entire rehumidification area to ensure uniform humidity on the surface of the tobacco and prevent local accumulation. Through automatic closed-loop control, the output of the high-pressure pump and the working state of the atomizing nozzle are adjusted in real time to ensure that the ambient humidity is always maintained within the set range.

[0109] After the rapid humidification in the front section, although the moisture content of the tobacco leaves is close to the target value, there are still local differences due to the uneven distribution of moisture inside the tobacco leaves during the moisture absorption process. For this reason, the present embodiment sets a back-end balancing stage, the main purpose of which is to reduce the humidification intensity, extend the rehumidification time, and gradually evenly distribute the moisture inside the tobacco leaves through fine regulation of temperature and humidity to stabilize the final moisture content. When entering the back-end balancing stage, the system automatically reduces the spray water volume of the high-pressure atomization system, and at the same time extends the spray interval to maintain a low but continuous humidification intensity, so that the surface humidity of the tobacco leaves no longer increases sharply. In the back-end balancing stage, the ambient temperature is appropriately increased (for example, regulated to 55°C to 60°C) to promote the diffusion and redistribution of moisture inside the tobacco leaves; at the same time, through the lower air intake circulation mode, the tobacco leaves after humidification are evenly placed in a stable temperature and humidity environment to promote the uniform diffusion of moisture from the surface layer of the tobacco leaves to the inside. In this stage, multi-point temperature and humidity monitoring is adopted to continuously compare the actual humidity of each detection point with the target value, dynamically adjust the output of the spray system and the fan speed, and ensure that the moisture absorption of each layer of tobacco leaves during the rehumidification process tends to be balanced. In order to further prevent local over-humidification, this embodiment also sets a micro-dehumidification device in the rear-stage equalization area. When it is detected that a certain local humidity exceeds the standard, the dehumidification fan is automatically started to discharge the excess moisture in time, thereby avoiding condensation water dripping due to excessive humidity. For example, when a tobacco factory applies this method, the moisture content of the tobacco leaves is quickly increased to about 11% after humidification in the front stage. After entering the rear-stage equalization stage, by lowering the spray intensity and extending the humidification time, the moisture content of the tobacco leaves is finally stabilized within the target range of 11% to 13%, and the moisture distribution inside the tobacco leaves is more uniform. Practical applications show that this segmented control method not only significantly reduces the overall energy consumption (due to the reduction of spray water volume and steam-assisted temperature control), but also effectively avoids the dripping phenomenon caused by local excess moisture in traditional processes, ensuring the stable rehumidification and high-quality storage of tobacco leaves.

[0110] By dividing the rehumidification process into a front humidification stage and a back balancing stage, the present invention achieves rapid absorption and balanced distribution of moisture during the rehumidification process of tobacco leaves, effectively solving the problem of moisture content fluctuation caused by uneven humidification in traditional processes. The front rapid humidification stage ensures that the tobacco leaves quickly reach the predetermined moisture content in a short time, laying the foundation for subsequent balancing; the back balancing stage reduces the humidification intensity and prolongs the rehumidification time, so that the moisture inside the tobacco leaves is further diffused and balanced, thereby improving the stability and safety of product storage. While reducing the consumption of steam and soft water, this method can significantly improve the rehumidification quality of tobacco leaves and the energy-saving effect of the process, and has a high industrial promotion value.

[0111] In one embodiment, Figure 6 As shown, the following steps S61-S63 are also included:

[0112] In step S61, the humidity monitoring system is used to obtain the environmental humidity data in the rehumidification area in real time;

[0113] In step S62, according to the humidity data, the output parameters of the high-pressure spray system are dynamically adjusted by the automatic control device, and the output parameters include any one or more of the water pressure and the nozzle opening state, and the dynamic adjustment is performed according to the following formula:

[0114]

[0115] Among them, Q is the output water flow of the current high-pressure spray system, Q0 is the reference water flow, K h is the humidity compensation coefficient, H set is the preset target ambient humidity, H m is the real-time detected ambient humidity, P is the actual water pressure of the current high-pressure spray system, and P set is the preset water pressure, N is the current nozzle opening state, and Nset is the preset nozzle opening state;

[0116] In step S63, according to the adjustment result, the water mist particle size and injection amount are optimized to meet the humidification requirements of different rehumidification stages, thereby further reducing energy consumption and ensuring the balance of tobacco humidification.

[0117] In one embodiment, a technical solution is provided for dynamically adjusting the output parameters of the high-pressure spray system (including any one or more of the water pressure and the nozzle opening state) through an automatic control device, so as to achieve optimal control of the water mist particle size and the spray amount during the rehumidification process, ensure the uniformity of humidification of the tobacco leaves during the rehumidification process, and further reduce energy consumption.

[0118] Multiple high-precision humidity sensors are arranged in the moisture-recovery area. These sensors collect the environmental humidity data in the area in real time and transmit the data to the central control unit. The central control unit receives the actual humidity value H m With the preset target humidity H set By comparison, the humidity deviation is calculated, and the output water flow Q of the high-pressure spray system is dynamically adjusted according to the following formula:

[0119]

[0120] Among them, Q is the output water flow of the current high-pressure spray system, Q0 is the reference water flow, K h is the humidity compensation coefficient, which is used to quantify the effect of the difference between the target humidity and the actual humidity on the water flow regulation. set is the preset target ambient humidity, H m is the real-time detected ambient humidity, P is the actual water pressure of the current high-pressure spray system, and P setis the preset water pressure, N is the current nozzle opening state, which can be expressed as the number of nozzles actually opened or its normalized value, and Nset is the preset nozzle opening state.

[0121] The output water flow rate is automatically adjusted according to the humidity deviation detected in real time, thereby dynamically changing the amount and particle size of water mist generated.

[0122] In actual operation, if the preset target humidity is 90%, and the humidity sensor detects that the actual humidity in the rehumidification zone is 85%, then H set -H m =5%; when Q0=100L / h, K h =0.02, preset water pressure P set =2.0MPa and the preset nozzle state, Nset = 10N, if the current water pressure P is actually 2.2MPa, and the number of nozzles currently opened is 9, the current required output water flow can be calculated by the formula:

[0123]

[0124] The control system automatically adjusts the output of the high-pressure pump based on the calculation result, so that the spray system operates at a flow rate of approximately 109L / h, thereby increasing the spray volume to compensate for the lack of humidity.

[0125] In the automatic control system, in addition to adjusting the water flow rate according to the humidity deviation, the water pressure and the nozzle opening state can also be synchronously regulated. For example, under certain working conditions, if the humidity in the rehumidification area is detected to be continuously low, the system can appropriately increase the water pressure P (to ensure that it does not exceed the upper limit of the equipment tolerance) or open more nozzles N to increase the water mist coverage; and when the humidity is too high, the water pressure is reduced accordingly or the number of nozzles opened is reduced to prevent excessive local humidification from causing condensation water to drip. In this way, multi-parameter linkage is achieved in the dynamic adjustment process to ensure that the ambient humidity in the rehumidification area is always kept within the predetermined target range, so that the humidification process of the tobacco leaves is more uniform and stable.

[0126] In order to further optimize the water mist particle size and spray volume, an auxiliary fan and a fine-tuning valve are also provided in this embodiment. The auxiliary fan is used to guide the water mist to fully mix with the air during the spraying process, accelerating the diffusion and refinement of the water droplets; while the fine-tuning valve can finely control the water flow to achieve secondary regulation of the spray pressure and flow rate. This auxiliary measure enables the particle size of the water mist to be further reduced before it reaches the surface of the tobacco leaves, ensuring that the water droplets are evenly dispersed and quickly absorbed by the tobacco leaves, thereby achieving the purpose of optimizing the rehumidification effect and reducing energy consumption.

[0127] In addition, in order to achieve long-term stable operation of the system, a self-learning algorithm module is set in the central control unit. This module can continuously optimize K based on historical data. hThe setting values ​​of parameters such as humidity and humidity control can automatically adapt to the humidity control requirements under different working conditions. For example, during continuous operation, the humidity control effects in different time periods can be compared, and the humidity compensation coefficient can be adjusted to make the control more accurate under similar working conditions in the future, thereby realizing a fully automated, intelligent and efficient moisture recovery process.

[0128] In summary, this embodiment achieves optimal control of the water mist particle size and injection amount by using the humidity monitoring system to obtain the environmental humidity data of the rehumidification area in real time, and dynamically adjusting the output parameters of the high-pressure spray system according to a preset formula. This closed-loop control scheme can not only automatically adjust the humidification water volume according to the real-time humidity deviation, but also achieve multi-parameter linkage control by adjusting the water pressure and the nozzle opening state, thereby ensuring the balance and stability of the tobacco leaf humidification process, while significantly reducing energy consumption. This embodiment can effectively improve the problems of uneven humidification and high energy consumption in the traditional rehumidification process, and provide an efficient, energy-saving and intelligent technical solution for the tobacco leaf re-drying and rehumidification process.

[0129] In addition, the mesh belt type re-drying equipment, condensed water collection pipeline, water storage container, filtered water tank, and high-pressure atomization system all adopt conventional equipment in the prior art and are assembled in a conventional manner.

[0130] In one embodiment, Figure 7 The following is a block diagram of a tobacco strip redrying and moisture-reinforcing energy-saving device according to an exemplary embodiment. Figure 7 As shown, the tobacco leaf redrying and moisture-reinforcing energy-saving device includes a redrying module 71, a collecting module 72, a collecting module 73 and a regulating module 74.

[0131] The redrying module 71 is used to place the tobacco strips in the mesh belt type redrying equipment and heat and dry the tobacco strips by steam;

[0132] The collecting module 72 is used to collect condensed water formed by condensation of steam after heat release;

[0133] The spray module 73 is used to introduce the condensed water into the rehumidification process of the tobacco strips in the form of spray, so that the water mist evenly contacts the surface of the tobacco strips, and humidifies the tobacco strips while heating them;

[0134] The regulating module 74 is used to monitor the ambient temperature and humidity during the tobacco strip redrying and rehumidification process, and adjust the heating and humidification intensity according to the humidity change to maintain the ambient temperature and humidity within a predetermined range to achieve precise control of the temperature and humidity.

[0135] The redrying module 71, the collecting module 72, the collecting module 73 and the regulating module 74 included in the block diagram of the tobacco strip redrying and moisture-reinforcing energy-saving device are controlled to execute the tobacco strip redrying and moisture-reinforcing energy-saving method described in any of the above embodiments.

[0136] like Figure 8 As shown, the present invention provides an electronic device 800, which includes: a communication interface, a processor 801, and a memory 802;

[0137] Among them, the memory 802 is used to store program instructions. When the program instructions are executed by the processor 801 that is communicatively connected to the memory 802 through the communication interface, the tobacco strips are placed in a mesh-belt re-drying device, and the tobacco strips are heated and dried by steam; condensed water formed by condensation after the steam releases heat is collected; the condensed water is introduced into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and the tobacco strips are humidified and heated at the same time; the ambient temperature and humidity during the re-drying and rehumidification process of the tobacco strips are monitored, and the heating and humidity intensity is adjusted according to the humidity changes to maintain the ambient temperature and humidity within a predetermined range.

[0138] The present invention provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, tobacco strips are placed in a mesh-belt re-drying device, and the tobacco strips are heated and dried by steam; condensed water formed by condensation after the steam releases heat is collected; the condensed water is introduced into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and the tobacco strips are humidified and heated at the same time; the ambient temperature and humidity during the re-drying and rehumidification process of the tobacco strips are monitored, and the heating and humidity intensity is adjusted according to the humidity change, so that the ambient temperature and humidity are maintained within a predetermined range.

[0139] It should be understood that the specific features, operations and details described hereinabove about the method of the present invention may also be similarly applied to the device and system of the present invention, or, vice versa. In addition, each step of the method of the present invention described above may be performed by the corresponding parts or units of the device or system of the present invention.

[0140] It should be understood that each module / unit of the device of the present invention can be implemented in whole or in part by software, hardware, firmware or a combination thereof. Each module / unit can be embedded in the processor of the computer device in the form of hardware or firmware or independent of the processor, or can be stored in the memory of the computer device in the form of software for the processor to call to perform the operation of each module / unit. Each module / unit can be implemented as an independent component or module, or two or more modules / units can be implemented as a single component or module.

[0141] In one embodiment, a computer device is provided, which includes a memory and a processor, and the memory stores computer instructions executable by the processor, and the computer instructions instruct the processor to execute each step of the method of the embodiment of the present invention when executed by the processor. The computer device can be a server, a terminal, or any other electronic device with necessary computing and / or processing capabilities in a broad sense. In one embodiment, the computer device may include a processor, a memory, a network interface, a communication interface, etc. connected through a system bus. The processor of the computer device can be used to provide necessary computing, processing and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and an internal memory. An operating system, a computer program, etc. may be stored in or on the non-volatile storage medium. The internal memory can provide an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface and the communication interface of the computer device can be used to connect and communicate with external devices through a network. The steps of the method of the present invention are executed by the processor.

[0142] The present invention may be implemented as a computer-readable storage medium having a computer program stored thereon, which causes the steps of the method of an embodiment of the present invention to be executed when executed by a processor. In one embodiment, the computer program is distributed on a plurality of computer devices or processors coupled to a network so that the computer program is stored, accessed, and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, may be performed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations may be performed by one or more computer devices or processors, and one or more other method steps / operations may be performed by one or more other computer devices or processors. One or more computer devices or processors may perform a single method step / operation, or perform two or more method steps / operations.

[0143] It will be understood by those skilled in the art that the method steps of the present invention can be completed by instructing related hardware such as a computer device or a processor through a computer program, and the computer program can be stored in a non-temporary computer-readable storage medium, and the steps of the present invention are executed when the computer program is executed. Depending on the circumstances, any reference to memory, storage, database or other media herein may include non-volatile and / or volatile memory. Examples of non-volatile memory include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk, etc. Examples of volatile memory include random access memory (RAM), external cache memory, etc.

[0144] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by this specification as long as there is no contradiction in such combination.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for energy saving by redrying and moistening tobacco strips, characterized in that: include: The tobacco strips are placed in a mesh belt type redrying device and heated and dried by steam; Collect the condensed water formed by the condensation of steam after heat release; The condensed water is introduced into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and the tobacco strips are humidified and heated at the same time; Monitor the ambient temperature and humidity during the redrying and rehumidification process of tobacco strips, and adjust the heating and humidity intensity according to the humidity changes to maintain the ambient temperature and humidity within the predetermined range to achieve precise control of temperature and humidity.

2. The tobacco strip redrying and moisture-conditioning energy-saving method according to claim 1, characterized in that: The condensed water formed by condensation after collecting the steam after heat release comprises: introducing the condensed water into a condensed water collection pipeline; The collected condensed water is stored in a heat-insulated water storage container for temporary storage; The condensed water in the water storage container is filtered and purified to ensure that the recovered water quality meets the reuse requirements.

3. The tobacco strip redrying and moisture-conditioning energy-saving method according to claim 1, characterized in that: The step of introducing the condensed water into the rehumidification process of the tobacco strips in the form of a spray so that the water mist evenly contacts the surface of the tobacco strips comprises: The condensed water is pressurized to a predetermined pressure by a high-pressure pump or compressed air; The pressurized condensed water is atomized into fine water droplets through an atomizing nozzle; The fine water droplets are sprayed onto the tobacco sheets, so that the water mist is evenly distributed on the surface of the tobacco sheets and is quickly absorbed.

4. The tobacco strip redrying and moisture-conditioning energy-saving method according to claim 2, characterized in that: The step of introducing the condensed water into the rehumidification process of the tobacco strips in the form of a spray so that the water mist evenly contacts the surface of the tobacco strips comprises: The humidity of the tobacco rehumidification environment is detected in real time by using a humidity sensor; Compare the detected humidity value with the preset target humidity value to obtain the humidity deviation; The amount of humidification water is automatically adjusted according to the humidity deviation to keep the ambient humidity within the target humidity value range.

5. The tobacco strip redrying and moisture-conditioning energy-saving method according to claim 1, characterized in that: The rehumidification process comprises: The rehumidification process is divided into a front humidification stage and a rear balancing stage. In the front humidification stage, the tobacco strips are quickly humidified with a relatively high ambient humidity so that the moisture content of the tobacco strips approaches a predetermined level in a short time. In the latter equalization stage, the method of isohumidification and temperature increase is adopted to stabilize the final moisture content of the tobacco strips and to evenly distribute the moisture in the tobacco strips.

6. The tobacco strip redrying and moisture-conditioning energy-saving method according to claim 4, characterized in that: Also includes: Use the humidity monitoring system to obtain the environmental humidity data in the rehumidification area in real time; According to the humidity data, the output parameters of the high-pressure spray system are dynamically adjusted by an automatic control device, wherein the output parameters include any one or more of the water pressure and the nozzle opening state, and the dynamic adjustment is performed according to the following formula: Among them, Q is the output water flow of the current high-pressure spray system, Q0 is the reference water flow, K h is the humidity compensation coefficient, H set is the preset target ambient humidity, H m is the real-time detected ambient humidity, P is the actual water pressure of the current high-pressure spray system, and P set is the preset water pressure, N is the current nozzle opening state, and Nset is the preset nozzle opening state; According to the adjustment results, the water mist particle size and spray volume are optimized to meet the humidification needs of different rehumidification stages, thereby further reducing energy consumption and ensuring the balance of tobacco humidification.

7. A tobacco strip redrying and moisture-reinforcing energy-saving device, characterized in that: include: The redrying module is used to place the tobacco strips in the mesh belt type redrying equipment and heat and dry the tobacco strips by steam; A collection module, used to collect condensed water formed by condensation of steam after heat release; A spray module, used to introduce the condensed water into the rehumidification process of the tobacco strips in the form of a spray, so that the water mist evenly contacts the surface of the tobacco strips, and humidifies the tobacco strips while heating them; The regulating module is used to monitor the ambient humidity during the redrying and rehumidification process of the tobacco strips, and adjust the humidification intensity according to the humidity changes to maintain the ambient humidity within a predetermined range to achieve precise control of the humidity.

8. The tobacco strip redrying and moisture-reinforcing energy-saving device according to claim 7, characterized in that: The redrying module, the collecting module, the collecting module and the regulating module are controlled to execute the tobacco strip redrying and moisture-reinforcing energy-saving method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: include: Communication interface, processor, memory; The memory is used to store program instructions, and when the program instructions are executed by the processor that is communicatively connected to the memory through the communication interface, the electronic device implements the energy-saving method for redrying and moisturizing tobacco strips as claimed in any one of claims 1 to 6.

10. A computer-readable storage medium having program instructions stored thereon, characterized in that: When the program instructions are executed by a computer, the computer implements the tobacco strip redrying and moisture-conditioning energy-saving method according to any one of claims 1 to 6.

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