Water adding control system for moisture content of tobacco leaves at outlet of leaf moistening roller

Abstract

The invention discloses a water adding control system for the moisture content of tobacco leaves at an outlet of a leaf moistening roller. The water adding control system comprises a material adding spraying device, an inlet moisture detector, an outlet moisture detector and a PLC. The inlet moisture detector is arranged at an inlet of the tobacco leaf moistening roller and used for detecting the inlet moisture content of tobacco leaves before the tobacco leaves enter the roller. The outlet moisture detector is arranged at an outlet of the tobacco leaf moistening roller and used for detecting the outlet moisture content of the tobacco leaves after the tobacco leaves are moistened and fed through the roller. The feeding and spraying device is arranged in the roller and used for spraying vaporific feed liquid to the tobacco leaves in the roller. And the PLC is in signal connection with the inlet moisture detector, the outlet moisture detector and the feeding injection device, and controls the injection amount of the feeding injection device according to the inlet moisture content and the outlet moisture content, so that the moisture content of tobacco leaves for tobacco moistening and feeding is kept within a set range. According to the invention, the uniformity and stability of material liquid spraying during tobacco leaf moistening and feeding can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco leaf moistening and feeding control, and more specifically, to a water adding control system for controlling the moisture content of tobacco leaves at a moistening drum outlet. Background Art

[0002] The moistening and feeding process in cigarette factories is a key link in the silk-making process. Moistening and feeding generally uses roller-type equipment to achieve the purpose of processing tobacco leaves. Moistening and feeding is to further increase the moisture and temperature of tobacco leaves that have been unpacked, loosened, foreign matter removed, and pre-mixed to make them loose, stretched, and soft; second, apply liquid evenly to the surface of the tobacco leaves to improve the sensory quality of the finished tobacco. In the actual production process, the moistening and feeding of leaves will be unstable, and the moisture content of tobacco leaves at the outlet of the moistening roller will be unstable, which will directly affect the Cpk quality rate of the subsequent leaf cutting process, increase the temperature fluctuation rate between batches in the first and second zones of the thin plate drying, and use unstable moisture at the drying outlet, which will affect the expansion quality, processing resistance and elasticity of the tobacco, and reduce the quality of the finished tobacco. Therefore, it is of great significance to evenly apply liquid to the tobacco leaves in the roller to improve the stability of the moisture content of the tobacco leaves at the roller outlet. Summary of the invention

[0003] The present invention provides a water adding control system for the moisture content of tobacco leaves at the outlet of a leaf moistening drum, which solves the problem of unstable moisture content of tobacco leaves at the outlet of the existing drum during leaf moistening and feeding, can improve the uniformity and stability of liquid spraying during leaf moistening and feeding, and improve the consistency of moisture content of tobacco leaves at the outlet of the drum.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A water adding control system for the moisture content of tobacco leaves at the outlet of a moistening drum, comprising: a feeding injection device, an inlet moisture detector, an outlet moisture detector and a PLC controller;

[0006] The inlet moisture detector is arranged at the inlet of the leaf moistening drum and is used to detect the inlet moisture content of the tobacco leaves before they enter the drum;

[0007] The outlet moisture detector is arranged at the outlet of the leaf moistening drum, and is used to detect the outlet moisture content of the tobacco leaves after the leaves are moistened and fed by the drum;

[0008] The feed injection device is arranged in the drum and is used to spray the tobacco leaves in the drum with atomized liquid;

[0009] The PLC controller is respectively connected to the inlet moisture detector, the outlet moisture detector and the feed injection device signals, and controls the injection amount of the feed injection device according to the inlet moisture content and the outlet moisture content, so that the moisture content of the tobacco leaves added for moistening is maintained within a set range.

[0010] Preferably, the feed injection device comprises: a steam injection nozzle and a steam control valve;

[0011] The steam ejector nozzle is arranged in the drum, and a steam pipe and a feeding pipe are arranged in the steam ejector nozzle, the feeding pipe is connected to the liquid source through a feeding pipeline, and the steam pipe is connected to an external high-pressure steam source through a steam pipeline;

[0012] The steam control valve is arranged on the steam pipeline, the PLC controller is connected with the steam control valve signal, and controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content, thereby controlling the ejected steam flow rate of the steam ejector nozzle, so that the steam ejector nozzle ejects according to the ejection amount.

[0013] Preferably, the steam ejector nozzle adopts a dual-medium nozzle.

[0014] Preferably, a steam ejector is provided in the steam ejector nozzle, the steam ejector is connected to the steam pipeline, and the steam ejector is used to form mixed steam with the inflowing liquid.

[0015] Preferably, the feed injection device further comprises: an electric regulating valve;

[0016] The control end of the steam control valve is connected to one end of a compressed air pipeline, and the other end of the compressed air pipeline is connected to an external compressed air source;

[0017] The electric regulating valve is arranged on the compressed air pipeline, and the control end of the electric regulating valve is connected to the PLC controller signal;

[0018] The PLC controller controls the electric regulating valve to adjust the compressed air flow rate according to the inlet moisture content and the outlet moisture content, thereby controlling the valve opening of the steam control valve.

[0019] Preferably, it also includes: a display;

[0020] The display is connected to the PLC signal, and the display is used to display the running status of the leaf moistening and feeding process and the valve opening value of the steam control valve in real time.

[0021] Preferably, it also includes: an alarm device;

[0022] The alarm device is connected to the PLC controller signal, and the PLC controller controls the alarm device to alarm when the outlet moisture content exceeds a set alarm range.

[0023] Preferably, the alarm device includes at least any one of the following: an indicator light, a buzzer and an audible and visual alarm.

[0024] Preferably, the PLC controller is provided with a PID control module, and the PID control module controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content.

[0025] Preferably, a plurality of the steam-inducing nozzles are arranged in sections in the drum to spray the tobacco leaves in the drum with liquid in sections.

[0026] The present invention provides a water adding control system for the moisture content of tobacco leaves at the outlet of a moistening drum, and controls the injection amount of a feeding injection device according to the inlet moisture content and outlet moisture content of tobacco leaves in the drum through a PLC controller, so that the moisture content of tobacco leaves fed with moistening and feeding is kept within a set range. The problem of unstable moisture content of tobacco leaves at the outlet of the existing drum during moistening and feeding can be solved, and the uniformity and stability of liquid spraying during moistening and feeding can be improved, and the consistency of moisture content of tobacco leaves at the outlet of the drum can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0028] Figure 1 It is a schematic diagram of a water adding control system for controlling the moisture content of tobacco leaves at the outlet of a moistening drum provided by the present invention.

[0029] Figure 2 It is a structural schematic diagram of a water addition control system for controlling the moisture content of tobacco leaves at the outlet of a moistening drum provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable persons skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0031] In view of the problem that the moisture content of tobacco leaves is unstable during leaf moistening and feeding, which affects the quality of tobacco leaves, the present invention provides a water adding control system for the moisture content of tobacco leaves at the outlet of a leaf moistening drum, which solves the problem of unstable moisture content of tobacco leaves at the outlet of the existing drum during leaf moistening and feeding, can improve the uniformity and stability of the drum during leaf moistening and feeding, and improve the consistency of the moisture content of tobacco leaves at the outlet of the drum.

[0032] like Figure 1 and Figure 2As shown, a water adding control system for the moisture content of tobacco leaves at the outlet of a moistening drum comprises: a feeding injection device, an inlet moisture detector, an outlet moisture detector and a PLC controller. The inlet moisture detector is arranged at the inlet of the moistening drum, and is used to detect the inlet moisture content of the tobacco leaves before they enter the drum. The outlet moisture detector is arranged at the outlet of the moistening drum, and is used to detect the outlet moisture content of the tobacco leaves after they are moistened and fed by the drum. The feeding injection device is arranged in the drum, and is used to spray mist liquid on the tobacco leaves in the drum. The PLC controller is respectively connected to the inlet moisture detector, the outlet moisture detector and the feeding injection device by signal, and controls the injection amount of the feeding injection device according to the inlet moisture content and the outlet moisture content, so that the moisture content of the tobacco leaves fed by the moistening drum is kept within the set range.

[0033] Specifically, when it is detected that a material with high moisture content enters the drum, the amount of liquid material sprayed in the feeding drum is reduced, and when it is detected that a small amount of moisture content physically enters the drum, the amount of liquid material sprayed in the feeding drum is increased. The moisture content of the material can be kept stable during the dynamic process. It meets the requirements and standards of the next step of leaf storage, is more conducive to the absorption of moisture by tobacco leaves in the leaf storage cabinet, balances the temperature of the moisture content of tobacco leaves, and makes the storage of tobacco leaves more efficient and high-quality, so as to meet the requirements of the next stage of leaf shred production, and use higher-quality shred production. The moisture content of the material at the entrance of the thin plate drying shreds is uniform and stable, the drying effect is better, the expansion effect of the shredded tobacco is better, the filling and elasticity are better, the rolled cigarettes are fuller, and the sensory quality is better.

[0034] Furthermore, the feeding and injection device comprises: a steam ejector head and a steam control valve. The steam ejector head is arranged in the drum, and is provided with a steam pipe and a feeding pipe therein, the feeding pipe is connected to the liquid source through a feeding pipeline, and the steam pipe is connected to an external high-pressure steam source through a steam pipeline. The steam control valve is arranged on the steam pipeline, the PLC controller is connected to the steam control valve signal, and controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content, thereby controlling the ejection steam flow of the steam ejector head, so that the steam ejector head ejects according to the injection amount.

[0035] Furthermore, the steam ejector nozzle adopts a dual-medium nozzle.

[0036] Furthermore, a steam ejector is provided in the steam ejector nozzle, the steam ejector is connected to the steam pipeline, and the steam ejector is used to form mixed steam with the inflowing liquid.

[0037] Furthermore, the feeding injection device also includes: an electric regulating valve; the control end of the steam control valve is connected to one end of the compressed air pipeline, and the other end of the compressed air pipeline is connected to an external compressed air source; the electric regulating valve is arranged on the compressed air pipeline, and the control end of the electric regulating valve is connected to the PLC controller signal; the PLC controller controls the electric regulating valve to adjust the compressed air flow rate according to the inlet moisture content and the outlet moisture content, thereby controlling the valve opening of the steam control valve.

[0038] In practical applications, such as Figure 2 As shown, the inlet moisture detector 1 and the outlet moisture detector 2 detect the moisture content of tobacco leaves at the inlet and outlet of the drum, the steam ejector nozzle 3 is connected to the steam pipeline 4 and the liquid feed pipeline 5, a steam control valve 6 is arranged on the steam pipeline, the control end of the steam control valve is connected to the external compressed air source through the compressed air pipeline, the valve opening of the steam control valve is controlled by the compressed air flow, an electric regulating valve 7 is arranged on the compressed air pipeline, and the electric regulating valve 7 is connected to the PLC controller signal. When normal production starts, the drum starts to moisten the leaves and feed, the inlet moisture detector starts to detect the moisture content of the drum inlet, and the outlet moisture detector detects the outlet moisture detection, and transmits the detected moisture content to the PLC in real time. After analysis, comparison and calculation by the PLC, if the outlet moisture content is too large, the electric regulating valve 7 is controlled not to be connected or the inlet flow is reduced, so that the steam of the steam control valve 6 is not connected or the steam flow is reduced, and finally the feeding pipeline is controlled not to be connected or the liquid feed flow is reduced, so as to achieve the purpose of reducing the moisture content of the outlet material. If the outlet moisture content is too low, the electric regulating valve is controlled to be connected or the inlet flow is increased, so that the steam is connected or the steam flow is increased through the steam control valve, and finally the material liquid pipeline is controlled to be connected or the flow of the water channel is increased, so as to achieve the purpose of increasing the outlet moisture content. In this dynamic adjustment process, the outlet material moisture content is stabilized.

[0039] The feeding injection device controls the opening of the steam control valve through compressed air. The opening of the steam control valve determines the flow rate of steam, which also determines the amount of steam-induced water. The moisture content of the material is detected by the moisture meter at the drum outlet, so that the steam control valve opening is controlled by the PLC, and finally the moisture content of the material at the drum outlet is stabilized. There are two medium channels inside the steam-induced nozzle, one for steam and one for water. At the nozzle outlet, the two channels are combined into one, and the shape is an arc fan, which makes it easier for the material to contact more moisture evenly. Water is injected through steam to add water to the drum, and the nozzle is installed at the drum entrance. The working state of the nozzle, whether it is working, the size of the nozzle opening and the amount of water injected are detected by the moisture meter at the drum outlet, and then the measured data is transmitted to the PLC. The PLC analyzes and compares it with the size of the moisture at the drum entrance, and then decides whether to transmit a signal to the compressed air that controls the opening of the steam valve to determine whether the steam valve is opened or the size of the opening. If the moisture content at the drum outlet is too low, the electric regulating valve is controlled to be connected or the compressed air flow rate is increased, so that the valve through the steam control valve is opened or the valve opening is increased, the steam is connected or the steam flow rate is increased, the water channel of the steam injection nozzle is connected or the flow rate of the water channel is increased, and the purpose of increasing the moisture content at the outlet is achieved.

[0040] The system also includes: a display; the display is connected to the PLC signal, and the display is used to display the running status of the leaf moistening and feeding process and the valve opening value of the steam control valve in real time.

[0041] The system also includes: an alarm device; the alarm device is connected to the PLC controller by signal, and the PLC controller controls the alarm device to alarm when the outlet moisture content exceeds a set alarm range.

[0042] Furthermore, the alarm device includes at least any one of the following: an indicator light, a buzzer, and an audible and visual alarm.

[0043] Furthermore, the PLC controller is provided with a PID control module, and the PID control module controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content.

[0044] Furthermore, a plurality of the steam-inducing nozzles are arranged in sections in the drum to spray the tobacco leaves in the drum with liquid in sections.

[0045] It can be seen that the present invention provides a water-adding control system for the moisture content of tobacco leaves at the outlet of the moistening drum, and controls the injection amount of the feeding injection device according to the inlet moisture content and outlet moisture content of the tobacco leaves in the drum through the PLC controller, so that the moisture content of the tobacco leaves fed with moistening and feeding is kept within the set range. The problem of unstable moisture content of the tobacco leaves at the outlet during moistening and feeding is solved, and the uniformity and stability of the liquid spraying of the drum during moistening and feeding can be improved, and the consistency of the moisture content of the tobacco leaves at the outlet of the drum is improved.

[0046] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A water adding control system for controlling the moisture content of tobacco leaves at the outlet of a moistening drum, characterized in that: include: Feed injection device, inlet moisture detector, outlet moisture detector and PLC controller; The inlet moisture detector is arranged at the inlet of the leaf moistening drum and is used to detect the inlet moisture content of the tobacco leaves before they enter the drum; The outlet moisture detector is arranged at the outlet of the leaf moistening drum, and is used to detect the outlet moisture content of the tobacco leaves after the leaves are moistened and fed by the drum; The feed injection device is arranged in the drum and is used to spray the tobacco leaves in the drum with atomized liquid; The PLC controller is respectively connected to the inlet moisture detector, the outlet moisture detector and the feed injection device signals, and controls the injection amount of the feed injection device according to the inlet moisture content and the outlet moisture content, so that the moisture content of the tobacco leaves added for moistening is maintained within a set range.

2. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 1, characterized in that: The feed injection device comprises: a steam injection nozzle and a steam control valve; The steam ejector nozzle is arranged in the drum, and a steam pipe and a feeding pipe are arranged in the steam ejector nozzle, the feeding pipe is connected to the liquid source through a feeding pipeline, and the steam pipe is connected to an external high-pressure steam source through a steam pipeline; The steam control valve is arranged on the steam pipeline, the PLC controller is connected with the steam control valve signal, and controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content, thereby controlling the ejected steam flow rate of the steam ejector nozzle, so that the steam ejector nozzle ejects according to the ejection amount.

3. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 2, characterized in that: The steam injection nozzle adopts a dual-medium nozzle.

4. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 3, characterized in that: A steam ejector is provided in the steam ejector nozzle, the steam ejector is communicated with the steam pipeline, and the steam ejector is used to form mixed steam for the inflowing feed liquid.

5. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 4, characterized in that: The feed injection device further comprises: an electric regulating valve; The control end of the steam control valve is connected to one end of a compressed air pipeline, and the other end of the compressed air pipeline is connected to an external compressed air source; The electric regulating valve is arranged on the compressed air pipeline, and the control end of the electric regulating valve is connected to the PLC controller signal; The PLC controller controls the electric regulating valve to adjust the compressed air flow rate according to the inlet moisture content and the outlet moisture content, thereby controlling the valve opening of the steam control valve.

6. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 5, characterized in that: Also includes: monitor; The display is connected to the PLC signal, and the display is used to display the running status of the leaf moistening and feeding process and the valve opening value of the steam control valve in real time.

7. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 6, characterized in that: Also includes: an alarm device; The alarm device is connected to the PLC controller signal, and the PLC controller controls the alarm device to alarm when the outlet moisture content exceeds a set alarm range.

8. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 7, characterized in that: The alarm device includes at least any one of the following: an indicator light, a buzzer and an audible and visual alarm.

9. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 8, characterized in that: The PLC controller is provided with a PID control module, and the PID control module controls the valve opening of the steam control valve according to the inlet moisture content and the outlet moisture content.

10. The water adding control system for controlling the moisture content of tobacco leaves at the outlet of the moistening drum according to claim 9, characterized in that: A plurality of steam-inducing nozzles are arranged in sections in the drum to spray the tobacco leaves in the drum with liquid in sections.

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