Air supplement system of cut stem air separator

Abstract

The utility model relates to the technical field of tobacco processing equipment, in particular to an air supplement system of a cut stem air separator, which comprises an air guide cover and an air supplement structure for providing constant-temperature and constant-humidity airflow, the air supplement structure comprises an air guide pipe connected with an environment dust remover through a waste gas outlet pipe and an adjusting air valve for adjusting the flow direction of waste gas of the dust remover; the wind scooper is of a box body structure installed on the periphery of the wind supplementing hopper, an air inlet connected with one end of the wind guiding pipe is formed in the wind scooper, the other end of the wind guiding pipe is connected with a waste gas outlet pipe of the environment dust remover, and waste gas from the environment dust remover is guided to the wind scooper by opening and closing the two adjusting air valves so as to supplement wind to the wind separator. The air guide pipe is further provided with a spray humidifying and cooling device for cooling and humidifying the high-temperature dry airflow, the humidity and temperature of an air source are regulated and controlled for air supplement, constant-temperature and constant-humidity air supplement is achieved, and the stability precision of the moisture content of the cut stems after winnowing is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco processing equipment, and particularly relates to a system for realizing constant temperature and humidity makeup air in a stem separator of a cut tobacco production line. Background Technique

[0002] Stem separation is an important process on the cut stem production line. The purpose is to appropriately cool the stem material at the outlet of the stem dryer and separate the stem tags mixed in the stem to obtain relatively pure stem. The working principle of the stem separator is as follows: using the action of air flow to separate the material. The material will generate inertia under the action of air flow, and the inertia will cause the material to change its motion state, so that impurities and harmful substances are separated. The motion state of the material in the air flow depends on factors such as the density, shape, and size of the material, while the impurities and harmful substances are separated because of their different characteristics such as density and size from the material.

[0003] There is no central air conditioner installed in the combined workshop of the process section where the stem separator is located. Therefore, its makeup air comes from the natural air on the workshop site. The temperature and humidity of its makeup air are crucial for the uniform stability of the moisture content of the stem after separation. However, the temperature and humidity on the workshop site are greatly affected by changes in the external natural environment. According to statistics, the temperature in the workshop environment is as high as 38 °C in summer and the humidity reaches about 65%. In winter, the temperature is as low as 20 °C and the humidity is only 33%. Especially during the quarter alternation, the temperature and humidity changes in the workshop environment will intensify, that is, the makeup air temperature and humidity of the stem separator are extremely unstable and do not have the desired constant temperature and humidity effect, resulting in the uniform stability of the moisture content of the stem after separation being more uncontrollable, becoming the control difficulty and pain point of this process. Summary of the Invention

[0004] To solve the above technical problems, the utility model provides a makeup air system for a stem separator, which is intended to utilize the air exhausted from the environmental dust removal in the blending and flavoring room (equipped with a central air conditioner and belonging to a constant temperature and humidity environment), that is, to guide the air flow at the outlet of the environmental dust removal fan in the blending and flavoring room to the stem separator as the makeup air source of the stem separator to meet the process requirements of relatively constant temperature and humidity makeup air for the stem separator. The air flow at the outlet of the environmental dust collector is generally called waste gas. For environmental dust removal, it only involves a small dust concentration problem and there are no other abnormal factors. Therefore, using the waste gas air flow as the makeup air source will not cause other impacts.

[0005] The specific technical solution is as follows:

[0006] A makeup air system for a stem separator, the system includes a wind guide cover 2 and a makeup air structure for providing a very stable and constant humidity air flow for the wind guide cover 2. The makeup air structure includes a duct 4 connected to the waste air outlet pipe 5 of the environmental dust collector and an adjusting air valve for adjusting the waste air flow direction;

[0007] The air guide hood 2 is wrapped around the outer periphery of the air supply funnel. An air inlet is provided on any side of the box body, and the air inlet is connected to the outlet of the air guide pipe 4. The constant temperature and humidity waste gas flow is introduced into the air guide hood 2 as an air supply source to supply air to the air supply funnel.

[0008] One end of the air guide pipe 4 is connected to the air inlet of the air guide hood 2, and the other end is connected to the waste gas outlet pipe 5 of the environmental dust collector in the cigarette making dust removal room to supply air to the air supply funnel placed in the air guide hood 2.

[0009] The regulating air valve includes a first regulating air valve 41 and a second regulating air valve 42. The first regulating air valve 41 is arranged at the front end of the air outlet of the waste gas outlet pipe 5 for regulating the air supply; the second regulating air valve 42 is arranged on the air guide pipe 4 for guiding the waste gas from the source of the waste gas outlet pipe 5 to the air guide hood 2.

[0010] An adjusting device 7 is also arranged on the air guide pipe 4. The adjusting device 7 includes a spray humidifying and cooling device. The spray humidifying and cooling device is communicated with the air guide pipe 4 through a pneumatic ball valve 8 for regulating the humidity and temperature of the air source.

[0011] Further, the air guide hood 2 is a split box body.

[0012] Further, the split box body of the air guide hood 2 is a left-right split structure. The left half box 21 and the right half box 22 are connected through a bayonet, and a sealing rubber strip is arranged at the connection for preventing air leakage.

[0013] Further, a relay fan is also connected to the air guide pipe 4 for supplementing the wind pressure damage caused by the too long connection pipe distance between the waste gas outlet of the environmental dust collector and the cut tobacco winnower.

[0014] Further, the adjusting device 7 is communicated with the pneumatic ball valve 8 through a connecting pipe. The connecting pipe is sequentially provided with a pressure gauge, a pressure reducing valve, and a stop valve from the connection end of the pneumatic ball valve 8, and the other end is connected to the spray humidifying and cooling device.

[0015] Further, the spray humidifying and cooling device includes a water source and an air source. The water source and the air source are respectively connected to the pneumatic ball valve 8 through a first connecting pipe 71 and a second connecting pipe 72.

[0016] Further, the water source is cooling water, which is used to supply water to the air guide pipe 4 when the air flow temperature is too high and dry, so that the air flow in the air guide pipe 4 maintains the required temperature and humidity; the air source is compressed air, which is used to control the opening and closing of the pneumatic ball valve 8.

[0017] Further, the environmental dust collector in the cigarette making dust removal room includes dust collectors at multiple dust removal sites.

[0018] Further, the air inlet and the outlet of the air guide pipe 4 are connected by threads.

[0019] Further, a fine atomizing nozzle 9 is provided at the water outlet of the spray humidification and cooling device.

[0020] The working principle of the present utility model: A supplementary air system for a cut tobacco winnower, the system includes an air guide cover (2) and a supplementary air structure for providing a stable and humid air flow to the air guide cover (2), the supplementary air structure includes an air guide pipe (4) connected to the exhaust air pipe (5) of the environmental dust collector and an adjusting air valve for adjusting the exhaust air flow direction and an adjusting device (7) for controlling the temperature and humidity.

[0021] When using this device for cut tobacco winnowing, when the cut tobacco winnower is operating, the first adjusting air valve (41) on the exhaust air external discharge pipe (6) (i.e., the exhaust air external discharge pipe (6)) on the concentrated discharge port air pipe will tend to be in a closed state, the second adjusting air valve (42) on the cut tobacco winnower air pipe (i.e., the air guide pipe (4)) will be opened, and the air flow from the environmental dust collector of the cut tobacco manufacturing dust removal room will be guided along the air guide pipe (4) through the second adjusting air valve (42) to the air guide cover (2), and then flow through the mesh holes of the supplementary air funnel to the winnowing chamber for cut tobacco winnowing. Conversely, when the cut tobacco winnower stops winnowing, the first adjusting air valve (41) is fully opened and the second adjusting air valve (42) is closed, and the air flow generated by the environmental dust collector in the blending and flavoring room will be discharged to the concentrated discharge port air pipe (i.e., the exhaust air external discharge pipe (6)).

[0022] An adjusting device (7) is provided on the air guide pipe (4) of this device. The exhaust gas with constant temperature and humidity (temperature is 25 ± °C, humidity is 60 ± 2%) in the blending and flavoring room, after passing through the dust collector, due to factors such as pipeline transportation friction, bag filtration, and fan work, the air flow temperature rises by about 15 °C and the humidity decreases by about 56%. To ensure that the temperature and humidity in the winnower meet the requirements for winnowing cut tobacco, the flow rate of the cooling water of the spray humidification and cooling device of the adjusting device (7) is adjusted to achieve temperature and humidity control.

[0023] Compared with the prior art, the beneficial effects of the present utility model are:

[0024] (1) This technical solution has a simple structure and low cost, but can preferably solve the common constant temperature and humidity air supply system;

[0025] (2) The exhaust gas containing trace dust can be sucked away again after being used as the supplementary air source for cut tobacco winnowing, and will not cause external overflow to pollute the workshop environment;

[0026] (3) Solve the problem of synchronous operation of the stem sieving machine and the environmental dust collector in the blending and flavoring area (i.e., the operation signal of the stem sieving machine is interlocked with the operation of the environmental dust collector in the blending and flavoring area. Implement a control method where the environmental dust collector in the blending and flavoring area can operate without the stem sieving machine necessarily running, but the environmental dust collector in the blending and flavoring area must run when the stem sieving machine is running). Brief Description of the Drawings

[0027] Figure 1 It is a schematic layout structure diagram of the present invention;

[0028] Figure 2 It is a schematic split structure diagram of the air guiding cover of the present invention;

[0029] Figure 3 It is a schematic structure diagram of the adjusting device of the present invention

[0030] Figure 4 It is a schematic layout diagram of the spray heating and humidifying device of the present invention;

[0031] In the figure, 1 - air separation box 1; 2 - air guiding cover; 21 - left half box; 22 - right half box; 3 - air separation pipeline; 4 - air guiding pipe; 41 - first adjusting air valve; 42 - second adjusting air valve; 5 - exhaust pipe of the dust collector for waste gas; 6 - external exhaust pipe for waste gas; 7 - adjusting device; 71 - first connecting pipe; 711 - first pressure gauge; 712 - first pressure reducing valve; 713 - first stop valve; 72 - second connecting pipe; 721 - second pressure gauge; 722 - second pressure reducing valve; 723 - second stop valve; 8 - pneumatic ball valve; 9 - fine atomizing nozzle. Detailed Embodiments

[0032] To make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.

[0033] Embodiment 1: A make-up air system for a stem sieving machine, the system includes an air guiding cover 2 and a make-up air structure for providing a stable and humid airflow to the air guiding cover 2, and the make-up air structure includes an air guiding pipe 4 connected to the exhaust pipe 5 of the environmental dust collector in the blending and flavoring area and an adjusting air valve for adjusting the flow direction of the waste gas;

[0034] The air guide cover 2 is wrapped around the outer periphery of the air supply funnel at the lower end of the air separation box 1. It is a split-type box body, including a left half box 21 and a right half box 22. The left half box 21 and the right half box 22 are connected by a bayonet, and a sealing strip is provided at the connection to prevent air leakage. An air inlet is provided on any side of the box body. The air inlet is connected to the outlet of the air guide pipe 4, and the constant temperature and humidity waste gas stream is introduced into the air guide cover 2 as an air supply source to supply air to the air supply funnel;

[0035] The blending and flavoring environmental dust collector includes multiple dust removal sites in the blending and flavoring room. The blending and flavoring room is kept at a constant temperature and humidity, with a temperature of 25 ± °C and a humidity of 60 ± 2%. The dust concentration in the waste gas is only 1.75 mg / m 3 , which is used as an air supply source for cut tobacco air separation and then sucked away again. The waste gas containing a small amount of dust will not overflow into the workshop and cause pollution.

[0036] The waste gas outlet pipe 5 of the above-mentioned blending and flavoring environmental dust collector is connected to the air guide pipe 4 and communicated with the air guide cover 2 through the air guide pipe 4. One end of the air guide pipe 4 is connected to the air inlet of the air guide cover 2. The air guide pipe 4 and the air inlet are connected by threads, and a sealing gasket is installed at the connection. The other end is connected to the waste gas outlet pipe 5 of the blending and flavoring environmental dust collector. An adjusting device 7 is also provided on the air guide pipe 4. The adjusting device 7 is a spray humidification and cooling device for regulating the temperature and humidity of the air flow coming from the blending and flavoring environmental dust collector, which is connected to the air guide pipe 4 through a pneumatic ball valve 8. The spray humidification and cooling device includes a water source and an air source. The water source and the air source are respectively connected to the pneumatic ball valve 8 through a first connecting pipe 71 and a second connecting pipe 72. One end of the first connecting pipe 71 is connected to the pneumatic ball valve 8, and the other end is connected to the water source (cooling water storage device). A first pressure gauge 711, a first pressure reducing valve 712, and a first stop valve 713 are sequentially arranged on the first connecting pipe 71 from the end near the pneumatic ball valve 8, for cooling and humidifying the air flow whose temperature has increased and humidity has decreased due to factors such as pipeline transportation friction, bag filtration, and fan work after passing through the dust collector by spraying cooling water into the air guide pipe. One end of the second connecting pipe 72 is connected to the pneumatic ball valve 8, and the other end is connected to the air source (compressed air). A second pressure gauge 721, a second pressure reducing valve 722, and a second stop valve 723 are sequentially arranged on the second connecting pipe 72 from the end near the pneumatic ball valve 8 to control the opening and closing of the pneumatic ball valve 8 through compressed air. A fine atomizing nozzle 9 for spraying the cooling water in a mist shape is provided on the pipeline in front of the pneumatic ball valve 8.

[0037] The regulating air valve includes a first regulating air valve 41 disposed at the front end of the air outlet of the waste gas outlet duct 5 and a second regulating air valve 42 disposed on the air guiding duct 4. When the cut tobacco air separator operates, the first regulating air valve 41 is closed, the second regulating air valve 42 is opened, and the air flow discharged from the environmental dust collector in the cut tobacco manufacturing dust removal room is guided along the air guiding duct 4 through the second regulating air valve 42 to the air guiding hood 2, and then flows through the mesh holes of the air supply funnel to the air separation chamber for cut tobacco air separation. When cut tobacco air separation is not performed, the first regulating air valve 41 is opened and the second regulating air valve 42 is closed, and the discharged waste gas is discharged through the waste gas external discharge pipe 6 for centralized treatment.

[0038] Embodiment 2: An implementation manner of the air guiding hood 2 of the present utility model is that the air supply hood is an integral pentahedron structure, and an air inlet connected to the air guiding duct 4 is provided on any one surface of the air supply hood.

[0039] Embodiment 3: Another implementation manner of the present utility model is that, on the basis of Embodiment 1, the device is further provided with a relay fan for providing a constant air source when the environmental dust collector fails and stops working.

[0040] Embodiment 4: The environmental dust collector in the blending and flavoring room (cut tobacco manufacturing dust removal room) is connected to dust collectors at multiple dust removal sites. After detection, the air volume of the dust removal fan is 20460 m 3 / h, while the air volume of the dust collector fan of the cut tobacco air separator is 18150 m 3 / h, so it can meet the usage requirements.

[0041] Regarding the waste gas parameters discharged from the environmental dust collector in the blending and flavoring room, according to the third-party detection data, the dust concentration is only 1.75 mg / m3. Moreover, after the waste gas is guided to the cut tobacco air separator, it is sucked away as its supplementary air. Therefore, the waste gas containing trace dust will not overflow into the workshop. In addition, the waste gas temperature is 40.2 °C and the humidity is 3.9%. This shows that after the constant temperature and humidity air flow (the blending and flavoring room has a constant temperature and humidity, with a temperature of 25 ± °C and a humidity of 60 ± 2%) passes through the dust collector, affected by factors such as pipeline transportation friction, bag filtration, and fan work, the air flow temperature rises by about 15 °C and the humidity decreases by about 56%.

[0042] It should be understood that the above specific implementation manners of the present utility model are only used for exemplary illustration or explanation of the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present utility model shall be included within the protection scope of the present utility model. In addition, the appended claims of the present utility model are intended to cover all changes and modification examples falling within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A make-up air system for a cut tobacco winnower, characterized in that, The system includes an air guide hood (2) and a make-up air structure that provides a constant temperature and humidity air flow for the air guide hood (2). The make-up air structure includes a guide air duct (4) connected to the exhaust air duct (5) of the environmental dust collector and an adjusting air valve for adjusting the air flow direction. The air guide hood (2) is installed in a wrapped manner around the periphery of the make-up air funnel. An air inlet is provided on any side of the box body, and the air inlet is connected to the outlet of the guide air duct (4) to introduce the constant temperature and humidity exhaust air flow as a make-up air source into the air guide hood (2) to make up air for the make-up air funnel. One end of the guide air duct (4) is connected to the air inlet of the air guide hood (2), and the other end is connected to the exhaust air duct (5) of the environmental dust collector in the cigarette making dust removal room to provide make-up air for the make-up air funnel placed in the air guide hood (2). The adjusting air valve includes a first adjusting air valve (41) and a second adjusting air valve (42). The first adjusting air valve (41) is arranged at the front end of the air outlet of the exhaust air duct (5) for regulating the make-up air; the second adjusting air valve (42) is arranged on the guide air duct (4) for guiding the exhaust gas from the exhaust air duct (5) to the air guide hood (2). An adjusting device (7) is also arranged on the guide air duct (4). The adjusting device (7) includes a spray humidification and cooling device, and the spray humidification and cooling device is communicated with the guide air duct (4) through a pneumatic ball valve (8) for regulating the humidity and temperature of the air source.

2. The air make-up system for a cut tobacco winnower according to claim 1, wherein The air guide hood (2) is a split box body.

3. The air make-up system of a cut tobacco winnower according to claim 2, characterized in that, The split box body is a left-right split structure. The left half box (21) and the right half box (22) are connected through a bayonet, and a sealing rubber strip is arranged at the connection for preventing air leakage.

4. A make-up air system for a cut tobacco winnower according to claim 1, characterized in that, A relay fan is also connected to the guide air duct (4) for supplementing the air pressure damage caused by the too long distance of the connecting pipe between the exhaust air outlet of the environmental dust collector and the cut tobacco air separator.

5. The air make-up system of a cut tobacco winnower according to claim 1, characterized in that, The adjusting device (7) is communicated with the pneumatic ball valve (8) through a connecting pipe. The connecting pipe is sequentially provided with a pressure gauge, a pressure reducing valve, and a stop valve from the connecting end of the pneumatic ball valve (8), and the other end is connected to the spray humidification and cooling device.

6. The air make-up system for a cut tobacco winnower according to claim 1, wherein The spray humidification and cooling device includes a water source and an air source. The water source and the air source are respectively connected to the pneumatic ball valve (8) through a first connecting pipe (71) and a second connecting pipe (72).

7. The air make-up system for a cut tobacco winnower according to claim 6, characterized in that The water source is cooling water, which is used to provide water source into the guide air duct (4) when the air flow temperature is too high and dry to keep the air flow in the guide air duct (4) at the required temperature and humidity; the air source is compressed air, which is used to control the opening and closing of the pneumatic ball valve (8).

8. The air make-up system of a cut stem winnower according to claim 1, characterized in that, The environmental dust collector in the cigarette making dust removal room includes dust collectors at multiple dust removal sites.

9. The air make-up system for a cut tobacco winnower according to claim 1, wherein, The air inlet and the outlet of the guide air duct (4) are connected by threads.

10. A make-up air system for a cut tobacco winnower according to claim 1, characterized in that, The water outlet of the spray humidification and cooling device is provided with a fine atomization nozzle (9).

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