Steam dryness regulation system and cut tobacco system

Abstract

The present disclosure provides a steam dryness adjusting system and a tobacco processing system, the steam dryness adjusting system comprising: a first flow path configured to receive and output a first steam, the first flow path comprising a first detection portion that detects first information of the first steam, the first information comprising gas pressure, gas temperature and gas flow rate of the first steam; a second flow path that receives and outputs pure water, the second flow path comprising a second detection portion that detects second information of the pure water, the second information comprising liquid pressure and liquid temperature of the pure water; and an ejector device connected to the output ends of the first flow path and the second flow path respectively, configured to mix the first steam output by the first flow path and the pure water output by the second flow path, and output a second steam; wherein the output pressure of the first steam is adjusted according to the first information and a set value of the second steam, and the output flow rate of the pure water is adjusted according to the first information, the second information and the set value of the second steam.

Description

Technical Field

[0001] This disclosure relates to tobacco machinery, and more particularly to a steam dryness control system and a tobacco processing system. Background Technology

[0002] In industry, steam is often used as a highly efficient energy carrier and process medium, transferring heat through its latent and sensible heat to achieve various technological operations such as heating, drying, sterilization, distillation, concentration, and power transmission. Among these, the dryness of steam is a crucial indicator affecting various processes.

[0003] In the tobacco manufacturing industry, tobacco needs to maintain a certain moisture content during processing to preserve its flexibility and processability, preventing breakage or spoilage during cutting and packaging. Therefore, related technologies use steam as a heat source to heat and humidify the tobacco shreds to achieve ideal processing conditions. The dryness of the steam has a significant impact on the quality of the processed tobacco: excessively high steam dryness leads to rapid water loss during processing, making the tobacco brittle, causing significant aroma loss, and ultimately affecting the quality and taste of the finished product; insufficient steam dryness causes the tobacco to absorb too much moisture, making it prone to mold and spoilage, delaying the processing, affecting production continuity, and impacting the final smoking quality of the tobacco.

[0004] In summary, precise control of steam dryness is extremely important in tobacco manufacturing, as it directly affects the physical properties and chemical composition of tobacco, as well as the final product quality and the consumer's smoking experience. Appropriate steam dryness facilitates uniform moisture distribution during processing, maintains the structural integrity of the tobacco, and promotes balanced internal chemical reactions, thus enhancing the aging process and flavor of the tobacco. Summary of the Invention

[0005] The purpose of this disclosure is to provide a steam dryness adjustment system and a silk-making system, which aim to regulate the dryness of the output steam to provide steam with different dryness, thereby improving the processing quality of silk products.

[0006] This disclosure provides a steam dryness adjustment system, comprising: a first flow path configured to receive and output first steam, the first flow path including a first detection unit configured to detect first information of the first steam, the first information including gas pressure, gas temperature, and gas flow rate of the first steam; a second flow path configured to receive and output purified water, the second flow path including a second detection unit configured to detect second information of the purified water, the second information including liquid pressure and liquid temperature of the purified water; and an ejector device connected to the output ends of the first flow path and the second flow path, configured to mix the first steam output from the first flow path and the purified water output from the second flow path, and output second steam; wherein the output pressure of the first steam is adjusted according to the first information and a set value of the second steam, and the output flow rate of the purified water is adjusted according to the first information, the second information, and the set value of the second steam.

[0007] In some embodiments of the steam dryness adjustment system, the steam dryness adjustment system further includes a control device, the first flow path further includes a first adjustment unit, and the second flow path further includes a second adjustment unit;

[0008] The control device is signal-connected to the first detection unit, the second detection unit, the first adjustment unit, and the second adjustment unit, and is configured to control the first adjustment unit to adjust the output pressure of the first steam according to the first information and the set value of the second steam, and / or control the second adjustment unit to adjust the output flow rate of the purified water according to the first information, the second information, and the set value of the second steam, wherein the set value includes the gas pressure and dryness of the second steam.

[0009] In some embodiments of the steam dryness control system, the first control unit further includes a pressure control device, and the first detection unit is configured to detect first information of the first steam and / or detect third information of the second steam, the third information including the gas pressure of the second steam output by the ejector device;

[0010] The control device is signal-connected to the pressure regulating device and the first detection unit, and is configured to control the pressure regulating device to adjust the gas pressure of the first steam according to the third information detected by the first detection unit and the set value of the second steam.

[0011] In some embodiments of the steam dryness control system, the first detection unit includes a first pressure detection device and a first temperature detection device, and the third information also includes the gas temperature of the second steam. The first temperature detection device is configured to detect the gas temperature of the second steam, and the control device is configured to report an error if it determines that the gas pressure of the second steam detected by the first pressure detection device and the gas temperature of the second steam detected by the first temperature detection device deviate from a preset relationship. The preset relationship includes that the gas temperature and gas pressure of the second steam are directly proportional.

[0012] In some embodiments of the steam dryness control system, the first detection unit includes a first pressure display device, and the second flow path further includes a first shut-off valve, which is configured to open the second flow path when the first pressure display device shows that the gas pressure of the first steam is stable.

[0013] In some embodiments of the steam dryness control system, the first detection unit includes a second pressure detection device and a second temperature detection device. The control device is configured to report an error if it determines that the gas pressure of the first steam detected by the second pressure detection device and the gas temperature of the first steam detected by the second temperature detection device deviate from a preset relationship. The preset relationship includes that the gas temperature and gas pressure of the first steam are directly proportional.

[0014] In some embodiments of the steam dryness conditioning system, the first flow path further includes a drying device connected to the input end of the first flow path and configured to dry the first steam and bring the first steam to a first dryness value.

[0015] In some embodiments of the steam dryness control system, a third flow path is also included, the input of which is connected to the drying device and configured to discharge condensate from the drying device.

[0016] In some embodiments of the steam dryness control system, the third flow path includes a condensate draining device connected to the drying device and configured to direct the condensate away from the drying device and / or prevent the first steam from flowing along the third flow path.

[0017] In some embodiments of the steam dryness control system, the third flow path further includes:

[0018] A second shut-off valve, disposed between the draining device and the drying device, is configured to open or close the third flow path; and / or

[0019] The third shut-off valve is located between the drainage device and the output end of the third flow path, and is configured to connect or close the third flow path.

[0020] A second aspect of this disclosure provides a tobacco processing system, comprising: the steam dryness adjustment system described in the first aspect of this disclosure; and a humidification device located downstream of the steam dryness adjustment system, configured to receive second steam provided by the steam dryness adjustment system and humidify the processed tobacco.

[0021] Based on the steam dryness adjustment system provided in this disclosure, a first flow path including a first detection unit is configured to adjust the output pressure of the first steam according to first information detected by the first detection unit and a set value of the second steam. A second flow path including a second detection unit is configured to adjust the output flow rate of purified water according to the first information, second information, and the set value of the second steam detected by the second detection unit. An ejector device connects the output ends of the first and second flow paths respectively to mix the first steam output from the first flow path and the purified water output from the second flow path, thereby controlling the dryness of the output second steam. This configuration facilitates accurate adjustment of the dryness value of the output second steam under fluctuating gas pressure environments, resulting in second steam with different dryness values.

[0022] The tobacco processing system disclosed herein includes the steam dryness adjustment system of this disclosure, thereby possessing the advantages of the steam dryness adjustment system of this disclosure. By controlling the dryness of the output second steam, the tobacco shreds can be processed in the second steam with optimal dryness, which is beneficial to improving the processing quality of the tobacco products.

[0023] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a steam dryness adjustment system according to an embodiment of the present disclosure.

[0026] Figure 1 In the figures, the labels represent:

[0027] 100. First flow path; 101. Fourth shut-off valve; 111. First pressure detection device; 112. Second pressure detection device; 113. First pressure display device; 114. Second pressure display device; 121. First temperature detection device; 122. Second temperature detection device; 131. Pressure regulating device; 141. Flow meter; 151. First filter device.

[0028] 200, Second flow path; 201, First shut-off valve; 211, Third pressure detection device; 212, Third pressure display device; 221, Third temperature detection device; 241, Metering pump; 251, Second filter device.

[0029] 300, Third flow path; 301, Second shut-off valve; 302, Steam trap; 303, Check valve; 304, Third shut-off valve.

[0030] 4. Ejector device; 5. Control device; 6. Drying device; 7. Atomizing nozzle. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0034] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] In the following description, Figure 1 The direction indicated by the middle arrow indicates the direction of gas and / or liquid flow.

[0036] This disclosure provides a steam dryness adjustment system, including: a first flow path 100, a second flow path 200, and an ejector device 4.

[0037] The first flow path 100 is configured to receive and output first steam. The first flow path 100 includes a first detection unit configured to detect first information of the first steam. The first information includes the gas pressure, gas temperature, and gas flow rate of the first steam.

[0038] The first steam can be supplied to the first flow path 100 by providing the conveying pressure, for example, through the power plant or the pre-loaded water tank.

[0039] The first detection unit may include, for example, Figure 1 The diagram shows a second pressure detection device 112 (e.g., a pressure sensor), a second temperature detection device 122 (e.g., a temperature sensor), and a flow meter 141. The second pressure detection device 112 detects the gas pressure of the first steam, the second temperature detection device 122 detects the gas temperature of the first steam, and the flow meter 141 detects the gas flow rate of the first steam. Furthermore, the second pressure detection device 112 can be positioned upstream of the second temperature detection device 122 along the first flow path 100, meaning the first steam passes through the second pressure detection device 112 first, and then the second temperature detection device 122. This arrangement helps reduce the influence of temperature changes in the first steam on the pressure reading, improving the accuracy of the gas pressure measurement.

[0040] The second flow path 200 is configured to receive and output purified water. The second flow path 200 includes a second detection unit configured to detect second information about the purified water. The second information includes the liquid pressure and liquid temperature of the purified water. The second detection unit may include, for example... Figure 1 The third pressure detection device 211 (e.g., pressure sensor), the third temperature detection device 221 (e.g., temperature sensor), and the metering pump 241 are shown. The third pressure detection device 211 detects the liquid pressure, the third temperature detection device 221 detects the liquid temperature, and the metering pump 241 detects and regulates the liquid flow rate.

[0041] The ejector device 4 is connected to the output terminals of the first flow path 100 and the second flow path 200, respectively, and is configured to mix the first steam output from the first flow path 100 and the pure water output from the second flow path 200, and output the second steam. The ejector device 4 may, for example, include an ejector. The second flow path 200 may, for example, include... Figure 1 The atomizing nozzle 7 shown atomizes the pure water before it enters the ejector device 4, so as to facilitate more thorough mixing of the pure water with the first steam in the ejector device 4.

[0042] The output pressure of the first steam is adjusted according to the set values ​​of the first information and the second steam. The output flow rate of purified water is adjusted according to the set values ​​of the first information, the second information, and the second steam.

[0043] By configuring the first flow path 100 to include a first detection unit, the output pressure of the first steam is adjusted according to the first information detected by the first detection unit and the set value of the second steam. Similarly, by configuring the second flow path 200 to include a second detection unit, the output flow rate of purified water is adjusted according to the first information, the second information, and the set value of the second steam detected by the second detection unit. An ejector device 4 connects the output ends of the first flow path 100 and the second flow path 200 to mix the first steam output from the first flow path 100 and the purified water output from the second flow path 200, thereby controlling the dryness of the output second steam. This configuration facilitates accurate adjustment of the dryness value of the output second steam under fluctuating gas pressure conditions, resulting in second steam with different dryness values.

[0044] In some embodiments, the steam dryness adjustment system further includes a control device 5. The first flow path 100 further includes a first adjustment unit. The second flow path 200 further includes a second adjustment unit. The control device 5 is signal-connected to the first detection unit, the second detection unit, the first adjustment unit, and the second adjustment unit, and is configured to control the first adjustment unit to adjust the output pressure of the first steam according to the first information and the set value of the second steam, and to control the second adjustment unit to adjust the output flow rate of purified water according to the first information, the second information, and the set value of the second steam. The set value of the second steam includes the gas pressure and dryness of the second steam. For example, the control device 5 receives a signal of the gas pressure of the first steam detected by the first detection unit and the set value of the gas pressure of the second steam, and compares their magnitudes. If the gas pressure of the first steam is greater than the set value, the control device 5 controls the first adjustment unit to depressurize the first steam; otherwise, it performs pressurization. For example, the control device 5 receives all the first information detected by the first detection unit, all the second information detected by the second detection unit, and the set value of the second steam, and calculates the output flow rate of the pure water according to the law of conservation of energy and the law of conservation of mass (first steam energy + pure water energy = second steam energy; first steam flow rate + pure water flow rate = second steam flow rate) and with reference to, for example, the following formula:

[0045] Q2=(h f3 +h fg3 *Xh f1 -h fg1 *98%)*Q1 / (h f2 -h f3 -h fg3 *X);

[0046] In the formula:

[0047] h f1 The liquid enthalpy (i.e., sensible heat of vapor) represents the first vapor, and its unit is kJ / kg. It is derived from the mapping relationship between the gas pressure and liquid enthalpy of the first vapor.

[0048] h fg1 The enthalpy of vaporization (i.e., latent heat of vaporization) of the first vapor is expressed in kJ / kg and is derived from the mapping relationship between the gas pressure of the first vapor and the enthalpy of vaporization.

[0049] h f2 The enthalpy value of pure water is represented by kJ / kg and is derived from the mapping relationship between the liquid pressure and liquid temperature of pure water and the enthalpy value detected by the second detection unit.

[0050] h f3 The liquid enthalpy (i.e., sensible heat of vapor) of the second vapor is represented by kJ / kg and is derived from the mapping relationship between the set value of the gas pressure of the second vapor and the liquid enthalpy.

[0051] h fg3 The enthalpy of vaporization (i.e., latent heat of vaporization) of the second vapor is expressed in kJ / kg and is derived from the mapping relationship between the set value of the gas pressure of the second vapor and the enthalpy of vaporization.

[0052] X represents the dryness setting value of the second steam;

[0053] Q1 represents the gas flow rate of the first steam, in kg / h;

[0054] Q2 represents the output flow rate of purified water, in kg / h.

[0055] In some embodiments, the control device 5 described above may be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof for performing the functions described herein.

[0056] The control device 5 is configured to control the first regulating unit to adjust the output pressure of the first steam according to the first information and the set value of the second steam, and to control the second regulating unit to adjust the output flow rate of pure water according to the first information, the second information and the set value of the second steam. This is beneficial to improving the accuracy of the dryness of the output second steam, and to realizing the automated control of the steam dryness regulation system, thereby improving regulation efficiency and reducing labor costs.

[0057] In some embodiments, the first regulating unit further includes a pressure regulating device 131. The first detection unit is configured to detect first information of the first steam and / or third information of the second steam, the third information including the gas pressure of the second steam output by the ejector device 4. The control device 5 is signal-connected to the pressure regulating device 131 and the first detection unit, and is configured to control the pressure regulating device 131 to regulate the gas pressure of the first steam based on the third information detected by the first detection unit and the set value of the second steam. The pressure regulating device 131 may be, for example, a pressure reducing valve.

[0058] The first detection unit detects third information, including the gas pressure of the second steam output by the ejector device 4. Based on the third information detected by the first detection unit and the set value of the second steam, the pressure regulating device 131 is controlled to regulate the gas pressure of the first steam. This facilitates real-time monitoring of the gas pressure of the second steam. When there is a deviation between the output gas pressure of the second steam and the set gas pressure, the steam dryness regulation system can respond quickly and make adjustments. This is beneficial for accurately controlling the obtained gas pressure of the second steam, and also helps to improve the degree of production automation, increase production efficiency, save time for manual inspection, and improve the safety and reliability of operation.

[0059] In some embodiments, the first detection unit includes a first pressure detection device 111 and a first temperature detection device 121. The third information also includes the gas temperature of the second steam, and the first temperature detection device 121 is configured to detect the gas temperature of the second steam. The control device 5 is configured to report an error if it determines that the gas pressure of the second steam detected by the first pressure detection device 111 and the gas temperature of the second steam detected by the first temperature detection device 121 deviate from a preset relationship. The preset relationship includes a direct proportional relationship between the gas temperature and the gas pressure. For example, an increase in gas pressure leads to an increase in gas temperature, and a decrease in gas pressure leads to a decrease in gas temperature. The first pressure detection device 111 may be, for example, a pressure sensor; the first temperature detection device 121 may be, for example, a temperature sensor.

[0060] The control device 5 is configured to report an error if the gas pressure of the second steam detected by the first pressure detection device 111 and the gas temperature of the second steam detected by the first temperature detection device 121 deviate from the preset relationship. This facilitates real-time monitoring of the output gas pressure and temperature of the second steam, and determines whether the first pressure detection device 111 and the first temperature detection device 121 are measuring accurately. This avoids discrepancies between the output gas pressure and the set value due to device malfunction, and allows for timely equipment replacement and maintenance, improving the reliability of the steam dryness regulation system and thus avoiding energy waste or economic losses.

[0061] In some embodiments, the first detection unit includes a first pressure display device 113. The second flow path 200 further includes a first shut-off valve 201, which is configured to open the second flow path 200 when the first pressure display device 113 indicates that the gas pressure of the first vapor is stable. The first pressure display device 113 may be, for example, a pressure gauge.

[0062] Steam pressure directly affects the saturation temperature and latent heat released per unit volume of steam. Maintaining stable gas pressure in the first steam is beneficial for maintaining its thermodynamic stability. Setting a first shut-off valve 201 to open the second flow path 200 only after the first pressure display device 113 indicates stable gas pressure in the first steam facilitates precise control of the dryness of the generated second steam, reduces dryness variations caused by pressure fluctuations, minimizes ineffective operations, and allows the steam dryness control system to directly calculate the flow rate of pure water during mixing operations, simplifying control calculations and improving regulation efficiency.

[0063] In some embodiments, the first detection unit includes a second pressure detection device 112 and a second temperature detection device 122. The control device 5 is configured to report an error if it determines that the gas pressure of the first steam detected by the second pressure detection device 112 and the gas temperature of the first steam detected by the second temperature detection device 122 deviate from a preset relationship. The preset relationship includes a direct proportional relationship between the gas temperature and gas pressure of the first steam.

[0064] The control device 5 is configured to report an error if the gas pressure of the second steam detected by the second pressure detection device 112 and the gas temperature of the second steam detected by the second temperature detection device 122 deviate from a preset relationship. This facilitates real-time monitoring of the output gas pressure and temperature of the second steam and ensures the accuracy of the detection equipment. In case of equipment failure, it can quickly identify and alert the user, thus preventing the output gas pressure of the second steam from deviating from the set value due to inaccurate detection, thereby avoiding energy waste or economic losses. This method also allows for timely equipment replacement or repair, improving the stability and reliability of the steam dryness control system.

[0065] In some embodiments, the first flow path 100 further includes a drying device 6. The drying device 6 is connected to the input of the first flow path 100 and is configured to dry the first steam and bring the first steam to a first dryness value. The drying device 6 may be, for example, a steam-water separator, a superheater, a steam drying tube, etc. The first dryness value may be, for example, 98±1%.

[0066] This setting helps stabilize the dryness of the first steam and eliminates the impact of dryness fluctuations on the steam dryness regulation system. Furthermore, stabilizing the first steam at its initial dryness value simplifies calculations and improves the regulation efficiency of the control device 5. The liquid water contained in the wet steam may cause corrosion and damage to the pipes and equipment on the first flow path 100. Maintaining a high dryness value for the first steam helps extend the service life of the equipment and also reduces the impact of humidity on the detection results of the first detection unit.

[0067] In some embodiments, the steam dryness control system further includes a third flow path 300. The input of the third flow path 300 is connected to the drying device 6 and is configured to discharge condensate from the drying device 6.

[0068] This design helps prevent condensate from accumulating in the first flow path 100, which can cause corrosion to the pipes, thus reducing the cost of daily maintenance and pipe cleaning.

[0069] In some embodiments, the third flow path 300 includes a hydrophobic device. The hydrophobic device is in communication with the drying device 6 and is configured to direct condensate away from the drying device 6 and / or prevent the first vapor from flowing along the third flow path 300. The hydrophobic device may include, for example, a... Figure 1 The steam trap 302 and check valve 303 shown are designed to facilitate the effective discharge of condensate without backflow, and also to prevent the first steam from being lost along the third flow path 300.

[0070] This design facilitates rapid drainage of condensate, ensuring the pipes in the first flow path 100 are free of water accumulation and preventing problems such as reduced thermal efficiency, pipe corrosion, and equipment malfunctions caused by condensate buildup. Furthermore, the condensate trap helps prevent leakage of the first steam through the third flow path 300, promoting efficient use of the first steam and conserving resources. Moreover, the condensate trap continuously drains condensate, reducing water hammer and protecting the pipes and equipment in the third flow path 300.

[0071] In some embodiments, the third flow path 300 further includes a second shut-off valve 301 and a third shut-off valve 304. The second shut-off valve 301 is disposed between the draining device and the drying device 6 and is configured to open or close the third flow path 300. The third shut-off valve 304 is disposed between the draining device and the output end of the third flow path 300 and is configured to open or close the third flow path 300.

[0072] The second shut-off valve 301 facilitates the maintenance of the third flow path 300. When maintenance is required, the third flow path 300 can be promptly shut off via the second shut-off valve 301, stopping the discharge of condensate and improving the safety of the maintenance environment. Furthermore, the third shut-off valve 304 helps prevent the pressure at the output of the third flow path 300 from affecting the equipment within the third flow path, preventing backflow of condensate at the output, and also facilitating pipeline maintenance.

[0073] Another aspect of this disclosure provides a tobacco processing system, which includes a steam dryness adjustment system and a humidification device provided in this disclosure. The humidification device is located downstream of the steam dryness adjustment system and is configured to receive second steam provided by the steam dryness adjustment system and humidify the processed tobacco.

[0074] The tobacco processing system of this disclosure has the advantages of the steam dryness control system of this disclosure. By controlling the dryness of the output second steam, the tobacco shreds can be processed in the second steam with optimal dryness, which is beneficial to improving the processing quality of the tobacco products.

[0075] The following combination Figure 1 A steam dryness adjustment system and method according to a specific embodiment of this disclosure will be described in detail. For example... Figure 1 As shown, the steam dryness control system includes a first flow path 100, a second flow path 200, a third flow path 300, and an ejector device 4. The ejector device 4 is connected to the output ends of the first flow path 100 and the second flow path 200, respectively, to receive the first steam output from the first flow path 100 and the pure water output from the second flow path 200. The input end of the third flow path 300 is connected to the drying device 6 of the first flow path 100, and the condensate separated from the drying device 6 is discharged from the steam dryness control system through the third flow path 300.

[0076] The first flow path 100 includes: a fourth shut-off valve 101, a first filter device 151, a drying device 6, a first detection unit, and a first regulating unit.

[0077] The first flow path 100 is opened or closed by the fourth shut-off valve 101 to control the flow of the first steam. This arrangement facilitates timely prevention of continuous flow of the first steam into the first flow path 100 when the steam dryness adjustment system is idle, thereby avoiding waste of steam energy. The first filter device 151 is located upstream of the drying device 6 to filter impurities in the first steam before it enters the drying device 6 for steam-water separation. This prevents large particles and impurities from entering the drying device 6 and causing blockages that could affect the gas pressure and flow rate of the first steam, thus improving the quality and accuracy of the manufactured second steam.

[0078] In this embodiment, the drying device 6 is a high-efficiency steam-water separator. This type of steam-water separator can efficiently separate the condensate carried in the first steam, sending the condensate into the drain valve 302 and check valve 303 located in the third flow path 300 and then discharging it from the system. Simultaneously, it increases the dryness of the first steam to approximately 98±1%. This arrangement helps stabilize the dryness of the first steam, eliminates the influence of dryness fluctuations on the steam dryness regulation system, and improves control accuracy.

[0079] The first detection unit includes: a first pressure detection device 111, a first temperature detection device 121, a second pressure detection device 112, a second temperature detection device 122, a flow meter 141, a first pressure display device 131, and a second pressure display device 114. The first pressure display device 113 and the second pressure display device 114 display the gas pressure of the first steam in the first flow path 100 in real time, facilitating recording and monitoring of the pressure status of the first flow path 100 by personnel, enabling timely adjustments when the gas pressure is too high or too low. Furthermore, the first pressure display device 113 and the second pressure display device 114 are respectively located downstream and upstream of the pressure regulating device 131 in the first regulating unit, which facilitates real-time monitoring of the operating status of the pressure regulating device 131 based on changes in the gas pressure of the first steam, thereby enabling timely detection, maintenance, and replacement of the pressure regulating device 131 in case of malfunction. The second pressure detection device 112, the second temperature detection device 122, and the flow meter 141 transmit the first information of the first steam to the control device 5 in real time. The first pressure detection device 111 and the first temperature detection device 121 transmit the third information of the second steam to the control device 5 in real time. The control device 5 controls the pressure regulating device 131 to adjust the output gas pressure of the first steam according to the set value of the gas pressure of the second steam and the third information.

[0080] The second flow path 200 includes: a first shut-off valve 201, a second filter device 251, an atomizing nozzle 7, a second detection unit, and a second adjustment unit.

[0081] The second flow path 200 is opened or closed by the first shut-off valve 201 to control the flow of pure water. This design facilitates stopping the supply of pure water to the ejector device 4 when there are fluctuations in the gas pressure of the first steam, or facilitates pipeline maintenance, thereby increasing the stability, controllability, and safety of the steam dryness adjustment system. The second filter device 251 is located upstream of the metering pump 241 to filter impurities before pure water enters the metering pump 241, preventing large particles and impurities from entering the metering pump 241 and reducing the equipment's service life.

[0082] The second detection unit includes a third pressure display device 212, a third pressure detection device 211, and a third temperature detection device 221. The second adjustment unit includes a metering pump 241. The third pressure display device 212 displays the liquid flow rate of purified water before it enters the metering pump 241 in real time, facilitating recording by personnel. The third pressure detection device 211 and the third temperature detection device 221 transmit the second information of the purified water to the control device 5 in real time. The control device 5 calculates the input flow rate of the purified water based on the first information, the second information, and the set value of the second steam, and controls the metering pump 241 to adjust the input flow rate of the purified water. Subsequently, the purified water is conveyed to the ejector device 4 along the second flow path 200, and atomized through the atomizing nozzle 7 before being conveyed to the ejector device 4, so that the purified water is fully mixed with the first steam, improving the accuracy of the dryness of the output second steam.

[0083] The third flow path 300 includes a condensate trap, a second shut-off valve 301, and a third shut-off valve 304. The input end of the third flow path 300 is connected to the drying unit 6 to receive condensate separated from the drying unit 6. The second shut-off valve 301 opens or closes the third flow path 300 to control the flow of condensate. The third shut-off valve 304 opens or closes the pipeline between the condensate trap and the output end of the third flow path 300 to prevent backflow of condensate at the output end and to facilitate pipeline maintenance. The condensate trap includes a condensate drain valve 302 and a check valve 303 to facilitate directional discharge of condensate without it flowing back into the drying unit 6. Furthermore, the condensate drain valve 302 is positioned upstream of the check valve 303 along the third flow path 300. This arrangement helps prevent backflow of condensate in the event of condensate drain valve 302 failure or pressure fluctuations within the third flow path 300.

[0084] The following is combined with Figure 1 The adjustment method of the steam dryness adjustment system in this embodiment is described as follows:

[0085] Open the second shut-off valve 301, the third shut-off valve 304, and the fourth shut-off valve 101 to introduce first steam into the first flow path 100. The first steam enters the drying device 6 after being filtered by the first filter device 151. The dryness value of the first steam after drying by the drying device 6 is 98±0.5%. The condensate separated from the drying device 6 is discharged from the steam dryness adjustment system along the third flow path 300.

[0086] Subsequently, the second pressure detection device 112, the second temperature detection device 122, and the flow meter 141 of the first detection unit respectively detect the gas pressure, gas temperature, and gas flow rate of the first steam, and transmit the detection results to the control device 5. The control device 5 controls the pressure regulating device 131 to adjust the gas pressure of the first steam according to the set value of the gas pressure of the second steam, until the gas pressure detected by the second pressure detection device 112 matches the set value. The first steam, after being regulated by the pressure regulating device 131, continues to be conveyed to the ejector device 4 along the first flow path 100.

[0087] When the first pressure display device 113 shows that the gas pressure of the first steam is stable, the first shut-off valve 201 is opened, and purified water is input into the second flow path 200. After being filtered by the second filter device 251, the purified water continues to be conveyed along the second flow path 200. The third pressure detection device 211 and the third temperature detection device 221 detect the liquid pressure and liquid temperature of the purified water and transmit the detection results to the control device 5. The control device calculates the input flow rate of the purified water based on the gas pressure, gas temperature, and gas flow rate of the received first steam, as well as the liquid pressure and liquid temperature of the received purified water, and controls the metering pump 241 to adjust the input flow rate of the purified water. The purified water, after flow adjustment, continues to be conveyed along the second flow path 200 to the ejector device 4 and atomized through the atomizing nozzle 7. The ejector device 4 mixes the atomized purified water with the first steam and outputs the second steam.

[0088] The first pressure detection device 111 and the first temperature detection device 121 detect the gas pressure and gas temperature of the output second steam and transmit the detection results to the control device 5. The control device 5 compares the detected gas pressure and gas temperature of the second steam with the set value. If the two do not match, the control pressure regulating device 131 regulates the gas pressure of the first steam.

[0089] Simultaneously, the control device 5 calculates and analyzes the detection results of the first pressure detection device 111, the first temperature detection device 121, the second pressure detection device 112, and the second temperature detection device 122, respectively. The control device 5 issues an error if it determines that the gas pressure of the second steam detected by the first pressure detection device 111 and the gas temperature of the second steam detected by the first temperature detection device 121 deviate from a preset relationship; it also issues an error if it determines that the gas pressure of the first steam detected by the second pressure detection device 112 and the gas temperature of the first steam detected by the second temperature detection device 122 deviate from a preset relationship. This allows the personnel to adjust and repair the various devices.

[0090] After the steam dryness adjustment system has been used, close the first shut-off valve 201, the second shut-off valve 301, the third shut-off valve 304, and the fourth shut-off valve 101 (the closing order can be any order).

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A steam dryness control system, characterized in that, include: A first flow path (100) is configured to receive and output a first steam. The first flow path (100) includes a first detection unit and a first regulation unit. The first regulation unit further includes a pressure regulation device (131). The first detection unit includes a first pressure detection device (111) and a first temperature detection device (121). It is configured to detect first information of the first steam. The first information includes the gas pressure, gas temperature and gas flow rate of the first steam. The first regulation unit is configured to regulate the output pressure of the first steam. The second flow path (200) is configured to receive and output purified water. The second flow path (200) includes a second detection unit and a second adjustment unit. The second detection unit is configured to detect second information of the purified water, the second information including the liquid pressure and liquid temperature of the purified water. The second adjustment unit is configured to adjust the output flow rate of the purified water. The ejector device (4) is connected to the output ends of the first flow path (100) and the second flow path (200) respectively, and is configured to mix the first steam output from the first flow path (100) and the pure water output from the second flow path (200), and output the second steam. The first detection unit is also configured to detect the third information of the second steam, the third information including the gas pressure and gas temperature of the second steam output by the ejector device (4). and The control device (5) is signal-connected to the first detection unit, the second detection unit, the first adjustment unit, and the second adjustment unit, and is configured to control the pressure regulating device (131) to adjust the output pressure of the first steam according to the first information, the third information detected by the first detection unit, and the set value of the second steam, and / or control the second adjustment unit to adjust the output flow rate of the pure water according to the first information, the second information, and the set value of the second steam, wherein the set value includes the gas pressure and dryness of the second steam; Wherein, the output pressure of the first steam is adjusted according to the first information and the set value of the second steam, and the output flow rate of the pure water Q2 = (hf3 + hfg3 × X - hf1 - hfg1 × 98%) × Q1 / (hf2 - hf3 - hfg3 × X), where hf1 is the liquid enthalpy of the first steam, hfg1 is the evaporation enthalpy of the first steam, hf2 is the enthalpy of the pure water, hf3 is the liquid enthalpy of the second steam, hfg3 is the evaporation enthalpy of the second steam, X is the dryness set value of the second steam, and Q1 is the gas flow rate of the first steam.

2. The steam dryness adjustment system according to claim 1, characterized in that, The control device (5) is configured to report an error if it determines that the gas pressure of the second steam detected by the first pressure detection device (111) and the gas temperature of the second steam detected by the first temperature detection device (121) deviate from a preset relationship, wherein the preset relationship includes that the gas temperature and gas pressure of the second steam are directly proportional.

3. The steam dryness adjustment system according to claim 1, characterized in that, The first detection unit includes a first pressure display device (113), and the second flow path (200) further includes a first shut-off valve (201). The first shut-off valve (201) is configured to open the second flow path (200) when the first pressure display device (113) displays that the gas pressure of the first steam is stable.

4. The steam dryness adjustment system according to claim 1, characterized in that, The first detection unit includes a second pressure detection device (112) and a second temperature detection device (122). The control device (5) is configured to report an error if it determines that the gas pressure of the first steam detected by the second pressure detection device (112) and the gas temperature of the first steam detected by the second temperature detection device (122) deviate from a preset relationship. The preset relationship includes that the gas temperature and gas pressure of the first steam are directly proportional.

5. The steam dryness adjustment system according to any one of claims 1 to 4, characterized in that, The first flow path (100) further includes a drying device (6), which is connected to the input end of the first flow path (100) and is configured to dry the first steam and make the first steam reach a first dryness value.

6. The steam dryness adjustment system according to claim 5, characterized in that, It also includes a third flow path (300), the input end of which is connected to the drying device (6) and is configured to discharge condensate from the drying device (6).

7. The steam dryness adjustment system according to claim 6, characterized in that, The third flow path (300) includes a hydrophobic device connected to the drying device (6) and configured to cause the condensate to flow away from the drying device (6) and / or prevent the first steam from flowing along the third flow path (300).

8. The steam dryness adjustment system according to claim 7, characterized in that, The third flow path (300) also includes: A second shut-off valve (301), disposed between the hydrophobic device and the drying device (6), is configured to open or close the third flow path (300); and / or The third shut-off valve (304) is disposed between the drainage device and the output end of the third flow path (300) and is configured to connect or close the third flow path (300).

9. A yarn-making system, characterized in that, include: The steam dryness control system according to any one of claims 1 to 8; and A humidification device, located downstream of the steam dryness adjustment system, is configured to receive the second steam provided by the steam dryness adjustment system and humidify the manufactured tobacco.

Images