Air-temperature moisture balance control system for cut stem winnowing device and winnowing device

Abstract

The utility model discloses an air-warm water balance control system for a cut stem winnowing device and the winnowing device, the air-warm water balance control system comprises an air supply pipeline and a winnowing box, and the air-warm water balance control system comprises a heating device, a temperature control device and a control device, the heating device is arranged at an air inlet of the winnowing box; the air temperature detector is arranged on the winnowing pipeline and used for detecting the temperature in the winnowing pipeline; the material moisture detector is arranged at a blanking port of the cut stem winnowing device; the control device is connected with the heating device, the air temperature detector and the material moisture detector so as to control the opening degree of the heating device according to the air temperature value of the air temperature detector and the discharging moisture value of the material moisture detector. The air-temperature moisture balance control structure is simple, the occupied area of equipment is small, the stability of the moisture content of cut stems at an outlet of the equipment is improved, fluctuation of cut stem crushing can be reduced to a certain extent, the cut stem structure is improved, and the cut stem quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of tobacco shred processing, in particular to an air temperature and moisture balance control system and an air selection device for a shredded tobacco stem air selection device. Background Art

[0002] At present, the domestic tobacco industry's post-drying wind conveying process for shredded stems is mostly a wind selection box equipped with a round tube or rectangular tube and a dropper, with a wind selection function for removing the tobacco stems from the shredded stems. The wind selection box is made, and after the shredded stems enter the wind selection box, the qualified shredded stems and stem heads and other debris are separated by wind. The qualified shredded stems are input into the next process through the pipe dropper, and the tobacco stem heads are discharged from the impurity removal port.

[0003] In actual production, the cut tobacco pipe is prone to condensation in rainy and humid weather in winter. Occasionally, the moisture content of the material at the outlet of the cut tobacco pipe is inconsistent before, during and after the production of the batch of materials, which seriously affects the quality of the cut tobacco. The reasons for the above problems usually include:

[0004] First: The temperature is low in winter, the air humidity is high, and the air in the high-altitude air delivery duct is low temperature and humid. During production, the high-temperature shredded tobacco coming from the upstream tobacco drying machine encounters the cold air with high humidity in the duct. The large temperature difference makes it easy for trace condensation to form on the surface of the shredded tobacco, causing the moisture content of the tobacco material to rise in the initial stage of feeding.

[0005] Second: With the progress of production, the temperature of the pipe wall and the air inside the pipe will continue to rise along with the warm material, the temperature difference between the pipe wall and the wind temperature inside the pipe and the material will continue to narrow, the condensation of water vapor on the surface of the material will gradually decrease, and the increase in the conveying air temperature will also increase the moisture loss of the stems during the conveying process, thus causing the moisture content at the outlet of the same batch of materials to be higher at the beginning and lower at the end.

[0006] Therefore, how to effectively ensure that the wind temperature during the transportation of shredded stems is stable and improve the stability of the moisture content of the shredded stems before flavoring has become a problem that needs to be urgently solved in the tobacco industry. Summary of the invention

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a wind temperature and moisture balance control system for a shredded stem air selection device. The wind temperature and moisture balance control structure is simple, the equipment occupies a small area, improves the stability of the moisture content of the shredded stems at the equipment outlet, and can reduce the fluctuation of shredded stem crushing to a certain extent, improve the shredded stem structure, and improve the shredded stem quality.

[0008] The utility model also provides a shredded stem air selection device having the wind temperature and moisture balance control system for the shredded stem air selection device.

[0009] In view of the above technical problems, the utility model provides the following technical solutions:

[0010] According to the wind temperature and moisture balance control system for the shredded stem air selection device of the embodiment of the utility model, the shredded stem air selection device includes an air delivery pipeline and an air selection box, and the wind temperature and moisture balance control system includes: a heating device, the heating device is arranged at the air inlet of the air selection box; an air temperature detector, the air temperature detector is arranged in the air selection pipeline and is used to detect the temperature in the air selection pipeline; a material moisture detector, the material moisture detector is arranged at the material drop port of the shredded stem air selection device; a control device, the control device is respectively connected to the heating device, the air temperature detector and the material moisture detector to control the opening of the heating device according to the air temperature value of the air temperature detector and the discharge moisture value of the material moisture detector;

[0011] According to the wind temperature and moisture balance control system for the shredded stem air selection device of the utility model, a heating device is arranged at the air inlet of the air selection box, and the control device is connected with the wind temperature detector and the material moisture detector to control the opening of the heating device with the wind temperature value and the discharge moisture value, so that preheating can be carried out and the heating power can be adjusted in time according to the discharge moisture value, effectively balancing the fluctuation of wind temperature in the conveying channel during the production process, making the loss of moisture in the shredded stems stable and controllable, and the air supply temperature is monitored and adjusted in real time, so that the moisture content of the exported shredded stems is clearly visible, the moisture fluctuation is small, the shredded stems are of high quality, and the requirements of the shredded stem drying and flavoring process can be met.

[0012] According to some embodiments of the utility model, the heating device includes a quick-detachable steam heat exchanger, which includes a bracket and a steam coil assembly installed on the bracket, and the steam coil assembly is arranged below the vibrating screen in the air separation box.

[0013] According to some embodiments of the utility model, the steam coil assembly includes an upper plate body and a lower plate body, the upper plate body is provided with an upper coil groove, the lower plate body is provided with a lower coil groove, the upper plate body and the lower plate body are attached to each other so that the upper coil groove and the lower coil groove are combined to form a steam coil channel.

[0014] According to some embodiments of the utility model, the steam coil assembly further includes an air inlet pipe and an air outlet pipe, and the heating device further includes a steam source, and the steam source, the air inlet pipe, and the air outlet pipe form a circulation loop.

[0015] According to some embodiments of the utility model, the wind temperature and moisture balance control system also includes a pipeline control cabinet and a steam control valve arranged in the pipeline control cabinet, the steam source and the control device are respectively arranged in the pipeline control cabinet, and the control device is configured to control the opening of the steam control valve according to the wind temperature value of the wind temperature detector and the discharge moisture value of the material moisture detector.

[0016] According to some embodiments of the utility model, the shredded stem air selection device also includes a dust removal fan arranged in the air selection air duct, and when the deviation of the output moisture value detected by the output moisture detector is less than 0.3%, the control device reduces the opening of the heating device; when the deviation of the output moisture value detected by the output moisture detector is greater than 0.3%, the control device increases the opening of the heating device.

[0017] The shredded stem air selection device according to the second aspect of the utility model includes the wind temperature and moisture balance control system for the shredded stem air selection device according to the first aspect of the utility model.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood through the embodiments of the utility model. The purpose and other advantages of the utility model can be achieved and obtained through the structures specifically pointed out in the written description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0020] Figure 1 It is a structural schematic diagram of a shredded stem air separation device according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a wind temperature and moisture balance control system for a shredded stem air selection device according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of a heating device for a wind temperature and moisture balance control system of a cut stem air selection device according to an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram comparing the moisture content of the output of the shredded stem air separation device according to the embodiment of the utility model and the existing shredded stem air separation device.

[0024] Attached photos

[0025] Wind temperature and moisture balance control system 100;

[0026] Air separation box 10; heating device 20; bracket 21; steam coil assembly 22; air inlet pipe 221; air outlet pipe 222; air separation pipeline 30; wind temperature detector 40; material moisture detector 50; pipeline control cabinet 60 Implementation

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Please refer to the following Figure 1-Figure 4 The wind temperature and moisture balance control system 100 for a shredded stem air selection device according to an embodiment of the present invention is described.

[0032] like Figure 1 As shown, the wind separation device for shredded stems according to the embodiment of the utility model comprises an air conveying duct and an air separation box 10. The air separation box 10 is located below the air conveying duct and connected to the air conveying duct to air separate the shredded stems.

[0033] like Figure 2 As shown, according to the utility model, the wind temperature and moisture balance control system 100 for the shredded stem air separation device includes a heating device 20, a wind temperature detector 40, a material moisture detector 50 and a control device. The heating device 20 is arranged at the air inlet of the air separation box 10, preferably, at the bottom air inlet of the air separation box 10.

[0034] The air temperature detector 40 is arranged in the air separation pipe 30 for detecting the air temperature in the air separation pipe 30 , and the material moisture detector 50 is arranged at the discharge port of the discharger of the stem shreds air separation device for detecting the moisture content of the discharged material.

[0035] The control device is connected to the heating device 20, the wind temperature detector 40, and the material moisture detector 50 respectively, and can control the opening of the heating device 20 according to the wind temperature value of the wind temperature detector 40 and the outlet moisture value of the material moisture detector 50, thereby realizing the preheating of the air selection pipeline 30 and the control of the moisture content of the shredded stems, reducing the fluctuation of the moisture content and improving the quality of the shredded stems.

[0036] Therefore, according to the wind temperature and moisture balance control system 100 for the shredded stem air selection device of the utility model, a heating device 20 is arranged at the air inlet of the air selection box 10, and the control device is connected with the wind temperature detector 40 and the material moisture detector 50 to control the opening of the heating device 20 according to the wind temperature value and the discharge moisture value, so that preheating can be performed and the heating power can be adjusted in time according to the discharge moisture value, so as to effectively balance the fluctuation of the wind temperature in the conveying channel during the production process, so that the loss of moisture in the shredded stems is stable and controllable, and the air supply temperature is monitored and adjusted in real time, so that the moisture of the exported shredded stems is clearly visible, the moisture fluctuation is small, the shredded stems are of high quality, and the requirements of the shredded stem drying and flavoring process can be met.

[0037] like Figure 2 In some embodiments, the heating device 20 includes a quick-detachable steam heat exchanger, which includes a bracket 21 and a steam coil assembly 22 installed on the bracket 21. The steam coil assembly 22 is arranged below the vibrating screen in the air separation box 10 to facilitate disassembly and maintenance.

[0038] like Figure 3 In some embodiments, the steam coil assembly 22 includes an upper plate body and a lower plate body. The upper plate body is provided with an upper coil groove, and the lower plate body is provided with a lower coil groove. The upper plate body and the lower plate body are attached to each other so that the upper coil groove and the lower coil groove are combined to form a steam coil channel. In this way, the steam forms a larger contact area through the steam coil channel, thereby improving the heating efficiency.

[0039] Furthermore, in order to achieve the opening control of the heating device 20, the steam coil assembly 22 also includes an air inlet pipe 221 and an air outlet pipe 222. The heating device 20 also includes a steam source. The steam source, the air inlet pipe 221, and the air outlet pipe 222 form a circulation loop, so that the steam is circulated and circulated for heating, thereby improving energy utilization.

[0040] like Figure 2 , Figure 3In some embodiments, the wind temperature and moisture balance control system 100 for the shredded stem air selection device also includes a pipeline control cabinet 60 and a steam control valve arranged in the pipeline control cabinet 60. Optionally, the steam control valve can be a steam film valve to improve the control accuracy of the steam. At the same time, in order to increase the integration, the steam source and the control device are respectively arranged in the pipeline control cabinet 60, and the control device is configured to control the opening of the steam control valve according to the wind temperature value of the wind temperature detector 40 and the output moisture value of the material moisture detector 50.

[0041] Therefore, the control valve, steam source, and control device are respectively arranged in the pipeline control cabinet 60, which can facilitate centralized control and maintenance, and improve integration and control convenience.

[0042] like Figure 2 , Figure 3 In some embodiments of the present invention, the shredded stem air selection device further includes a dust removal fan arranged in the air selection air duct. When the moisture value of the discharge material detected by the discharge moisture detector is less than 0.3%, the control device reduces the opening of the heating device 20; when the moisture value of the discharge material detected by the discharge moisture detector is greater than 0.3%, the control device increases the opening of the heating device 20.

[0043] Specifically, before production, first start the dust removal fan of the shredded stem air delivery pipeline, and at the same time open the steam film valve in the heat exchanger control cabinet, and use hot air to preheat the shredded stem pipeline equipment until the air temperature in the equipment pipeline reaches the set value. Then start the front feed vibration trough for production. The high-temperature shredded stems after baking will continuously heat the pipeline during the transportation process, and the air temperature will continue to rise. At this time, the moisture loss of the transported shredded stems will be greater. When the discharge moisture detection is lower than the set value of 0.3%, the program automatically adjusts to reduce the air intake of the heat exchanger steam film valve, gradually lowering the hot air temperature and reducing the loss of moisture; when the discharge moisture detection is higher than the set value of 0.3%, the program automatically increases the steam intake of the heat exchanger to increase the air temperature.

[0044] The conveying air temperature is automatically controlled to achieve the output moisture fluctuation within the set range. That is, the output moisture is controlled within the range of ±0.3% of the set value. The whole process can be automatically operated to ensure the quality of the shredded stems.

[0045] The shredded stem air selection device according to the second aspect of the utility model comprises the wind temperature and moisture balance control system 100 for the shredded stem air selection device according to the first aspect of the utility model. Accordingly, the shredded stem air selection device has the characteristics of stability of the moisture content of the shredded stems, can reduce the fluctuation of the shredded stem crushing to a certain extent, and has the characteristics of high quality of the shredded stems.

[0046] According to the research and analysis of the above improvement scheme, a trial-produced shredded stem air separation device with a wind temperature and moisture balance control system 100 was experimentally compared with the original natural wind shredded stem air separation device under the same flow rate. Under the same climatic conditions, the same brand and flow rate of shredded stems were air-fed before and after the improvement, and 14 samples were taken uniformly before and after the whole batch of materials, and the average moisture value was detected in the oven. The equipment was compared by measuring the moisture content index at the outlet of the shredded stem pipeline equipment. The results are shown in Table 1 and Figure 4 shown.

[0047] Export moisture 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Original equipment 13.6 13.7 13.5 13.2 13.3 13.2 13 12.8 12.9 12.5 12.4 12.3 12.5 12.1 After Improvement 12.5 12.4 12.4 12.3 12.2 12.2 12.2 12.4 12.5 12.7 12.6 12.8 12.6 12.5

[0048] As shown in Table 1, in the process of producing the same material before and after the improvement, the moisture content of the material at the outlet of the air delivery pipe of the original shredded stem air selection device was high at the beginning and low at the end with a large deviation, which confirmed that the moisture loss of shredded stems was different under different wind temperatures; compared with the shredded stems after adding the wind temperature and moisture balance system, the moisture content of the shredded stems fluctuated more slowly, and fluctuated slightly in an orderly manner within the set range as the program progressed. The stability of the moisture content also further improved the quality of shredded stems.

[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A wind temperature and moisture balance control system for a shredded stem air selection device, the shredded stem air selection device comprising an air delivery pipeline and an air selection box, characterized in that: include: A heating device, the heating device being arranged at the air inlet of the air separation box; An air temperature detector, which is disposed in the air selection duct and is used to detect the temperature in the air selection duct; A material moisture detector, the material moisture detector being arranged at a material drop opening of the shredded stem air selection device; A control device is respectively connected to the heating device, the wind temperature detector and the material moisture detector to control the opening of the heating device according to the wind temperature value of the wind temperature detector and the output moisture value of the material moisture detector.

2. The wind temperature and moisture balance control system for the cut stem air selection device according to claim 1, characterized in that: The heating device comprises a quick-detachable steam heat exchanger, which comprises a bracket and a steam coil assembly mounted on the bracket, and the steam coil assembly is arranged below the vibrating screen in the air separation box.

3. The wind temperature and moisture balance control system for the cut stem air selection device according to claim 2, characterized in that: The steam coil assembly includes an upper plate body and a lower plate body. The upper plate body is provided with an upper coil groove, and the lower plate body is provided with a lower coil groove. The upper plate body and the lower plate body are attached to each other so that the upper coil groove and the lower coil groove are combined to form a steam coil channel.

4. The wind temperature and moisture balance control system for the cut stem air selection device according to claim 2, characterized in that: The steam coil assembly further includes an air inlet pipe and an air outlet pipe, and the heating device further includes a steam source. The steam source, the air inlet pipe, and the air outlet pipe form a circulation loop.

5. The wind temperature and moisture balance control system for the cut stem air selection device according to claim 4, characterized in that: It also includes a pipeline control cabinet and a steam control valve arranged in the pipeline control cabinet. The steam source and the control device are respectively arranged in the pipeline control cabinet. The control device is constructed to control the opening of the steam control valve according to the wind temperature value of the wind temperature detector and the output moisture value of the material moisture detector.

6. The wind temperature and moisture balance control system for the cut stem air selection device according to any one of claims 1 to 5, characterized in that: The shredded stem air selection device also includes a dust removal fan arranged in the air selection air duct. When the deviation of the output moisture value detected by the material moisture detector is less than 0.3%, the control device reduces the opening of the heating device; when the deviation of the output moisture value detected by the output moisture detector is greater than 0.3%, the control device increases the opening of the heating device.

7. A shredded stem wind selection device, characterized in that: include: A wind temperature and moisture balance control system for a shredded stem air selection device according to any one of claims 1-6.

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