Tunnel type tobacco stem moisture regaining machine outlet moisture control device

Abstract

The utility model discloses a tunnel type tobacco stem moisture regaining machine outlet moisture control device, which relates to the technical field of cigarette stem making, and comprises a heating device, a blowing assembly and a controller, the heating device is arranged on a cover plate of a moisture regaining cylinder of the tunnel type tobacco stem moisture regaining machine and is communicated with the steam main pipeline through a second steam branch pipe; the blowing assembly comprises a compressed air blowing assembly and a steam blowing assembly, and the steam blowing assembly is installed at the bottom of a moisture regaining cylinder of the tunnel type tobacco stem moisture regaining machine and communicated with a steam main pipeline through a first steam branch pipe; the compressed air blowing assembly is installed at an outlet of a moisture regaining cylinder of the tunnel type tobacco stem moisture regaining machine. And the heating device and the blowing assembly are electrically connected with the controller. The moisture fluctuation of the tobacco stems after pressurization and moisture regaining is reduced, the moisture content of the raw stem shreds is effectively stabilized, the moisture qualification rate of materials after stem pressing and stem shredding is improved, and the quality of the pressed tobacco stems and the cut stem shreds is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette stem making, and in particular to an outlet moisture control device of a tunnel type tobacco stem rehumidification machine. Background Art

[0002] The tunnel type tobacco stem rehumidification machine is mainly used to increase the temperature and humidity of the stored tobacco stems on the tobacco production line to meet the requirements of the subsequent process. After washing or soaking the tobacco stems, they enter the tunnel type tobacco stem rehumidification machine after passing through the mesh bag and the vibrator, and are stirred and heated by spraying steam. After the above treatment, the temperature and moisture content of the tobacco meet the process requirements, and the filling capacity of the tobacco is significantly improved, reducing the tobacco crushing in the subsequent mechanical processing process and reducing the loss of raw materials.

[0003] During the production process of the existing tunnel-type tobacco stem rehumidification machine, due to the low temperature of the cover plate, high-temperature water vapor easily forms condensed water on the inner surface of the cover plate. During the vibration transmission process inside the tunnel-type rehumidification machine, the tobacco shreds combine with the condensed water on the inner surface of the cover plate to form wet mass of tobacco shreds, which directly affects the determination of the actual moisture content of the tobacco shreds and causes large fluctuations in the moisture content of the processed tobacco stems.

[0004] In addition, the existing tunnel-type tobacco stem rehumidification machine has only one steam nozzle at the material inlet. The contact time between the high-temperature steam and the material is short, and the material cannot be fully mixed. The material cannot reach the expected moisture content under the set steam pressure or steam flow rate, which not only causes waste of steam, but also leads to a low qualified rate of moisture content of raw stem shreds, which has a great impact on the quality of the material after pressing and cutting the stems. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine, which can reduce the moisture fluctuation of the tobacco stems after pressurized conditioning, effectively stabilize the moisture content of raw stem shreds, and improve the product quality of pressed tobacco stems and cut stem shreds.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A moisture control device for an outlet of a tunnel-type tobacco stem rehumidification machine, comprising a heating device, a spraying assembly and a controller;

[0008] The heating device is installed at the cover plate of the rehumidification cylinder of the tunnel-type tobacco stem rehumidification machine, and is connected to the steam main pipeline through the second steam branch pipe;

[0009] The spray assembly includes a compressed air spray assembly and a steam spray assembly. The steam spray assembly is installed at the bottom of the rehumidification cylinder of the tunnel-type tobacco stem rehumidification machine and is connected to the steam main pipeline through the first steam branch pipe. The compressed air spray assembly is installed at the outlet of the rehumidification cylinder of the tunnel-type tobacco stem rehumidification machine.

[0010] The heating device and the blowing assembly are both electrically connected to the controller.

[0011] As a further implementation, the end of the steam main pipeline along the steam flow direction is connected to the first steam branch pipe and the second steam branch pipe, and the other end thereof is connected to a steam source;

[0012] A steam-liquid separator, a first stop valve and a filter are sequentially connected in series on the steam main pipeline along the steam flow direction.

[0013] As a further implementation, the steam spraying assembly includes a plurality of branch pipelines connected to the end of the first steam branch pipe along the steam flow direction, and the ends of the plurality of branch pipelines are all connected to spray heads;

[0014] A third stop valve is provided on each of the plurality of branch pipelines.

[0015] As a further implementation, it also includes a condensate discharge component, which includes a condensate discharge pipeline, one end of the condensate discharge pipeline is connected to the gas-liquid separator, and the other end is a condensate discharge end.

[0016] As a further implementation, a fourth stop valve, a steam trap and a second check valve are sequentially connected in series on the condensate discharge pipeline along the direction of condensate discharge.

[0017] As a further implementation, a temperature sensor is provided on the inner surface of the top cover of the rehumidification cylinder, and the temperature sensor is electrically connected to the controller.

[0018] As a further implementation, the compressed air blowing device includes a compressed air pipeline, and a nozzle is installed at the end of the compressed air pipeline along the direction of compressed air flow;

[0019] A compressed air heating device is installed on the compressed air pipeline.

[0020] As a further implementation method, a moisture meter is also provided at the outlet of the moisture conditioning cylinder of the tunnel-type tobacco stem conditioning machine, and the moisture meter is arranged on the rear side of the compressed air blowing device.

[0021] As a further implementation method, a pneumatic diaphragm valve, a pressure transmitter, a pressure gauge and a first check valve are sequentially connected in series on the first steam branch pipe along the steam flow direction;

[0022] The pressure transmitter and the pressure gauge are both electrically connected to the controller.

[0023] As a further implementation, a second stop valve, a steam pneumatic valve and a steam heat exchanger are sequentially connected in series on the second steam branch pipe along the steam flow direction;

[0024] The steam pneumatic valve is electrically connected to the controller.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The present invention provides a moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine, which preheats the cover plate by arranging a steam heat exchanger at the cover plate of the tunnel-type conditioning machine, collects the temperature of the cover plate of the tunnel-type conditioning machine in real time by a temperature sensor, and adjusts the temperature of the cover plate of the tunnel-type conditioning machine by a steam pneumatic valve, so that the cover plate temperature of the tunnel-type conditioning machine is always within an appropriate range, thereby preventing the generation of condensed water, keeping the humidity of tobacco shreds stable, and improving the quality of the product.

[0027] 2. The present invention is provided with a plurality of steam nozzles along the direction of the material flowing in the moisture reconditioning cylinder, so that the flowing material can be fully mixed and contacted with the high-temperature steam, ensuring that the material reaches the expected moisture content at the set steam pressure or steam flow rate.

[0028] 3. The present invention is provided with a compressed air blowing device at the material outlet of the rehumidification cylinder, which can evenly blow compressed air onto the tobacco stems to remove the moisture on the surface of the tobacco stems and reduce the influence of the moisture on the surface of the tobacco stems on the data collected by the moisture meter. A moisture meter is installed on the rear side of the blowing device to collect the moisture content of the tobacco stems in real time and feed it back to the control device for adjusting and controlling the moisture content of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 It is a schematic diagram of the overall structure of the moisture control device at the outlet of the tunnel-type tobacco stem rehumidification machine of the present invention.

[0031] Among them, 1. Steam main pipeline, 2. First steam branch, 3. Second steam branch, 4. Compressed air pipeline, 5. Steam-liquid separator, 6. First stop valve, 7. Filter, 8. Pressure gauge, 9. Second stop valve, 10. Third stop valve, 11. Pneumatic diaphragm valve, 12. Pressure transmitter, 13. First check valve, 14. Second check valve, 15. Condensate discharge pipeline, 16. Fourth stop valve, 17. Steam trap, 18. Nozzle, 19. Compressed air heating device, 20. Steam pneumatic valve, 21. Steam heat exchanger, 22. Rehumidification cylinder. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] like Figure 1 As shown, this embodiment provides a moisture control device for an outlet of a tunnel-type tobacco stem rehumidification machine, including a heating device, a spraying assembly and a controller, and the heating device and the spraying assembly are both electrically connected to the controller.

[0034] The heating device is installed at the cover plate of the tempering cylinder 22 of the tunnel-type tobacco stem tempering machine, and is connected to the steam main pipeline 1 through the second steam branch pipe 3. The steam source transports high-temperature steam to the heating device through the steam main pipeline 1 and the second steam branch pipe 3, so that the heating device and the cover plate perform heat exchange and preheat the cover plate to prevent the high-temperature steam entering the tempering cylinder 22 from hitting the low-temperature cover plate to produce condensed water, thereby affecting the moisture content of the material; at the same time, a temperature sensor is provided on the inner surface of the top cover plate of the tempering cylinder 22, and the temperature sensor is electrically connected to the controller. The temperature sensor detects the temperature of the inner surface of the cover plate of the tempering cylinder 22 in real time and sends it to the controller. When the temperature of the cover plate of the tunnel-type tempering machine reaches the set temperature, the second stop valve 9 is closed and the tunnel-type tempering machine starts to work. During the operation of the tunnel-type tempering machine, if the temperature sensor detects that the temperature of the cover plate of the tunnel-type tempering machine is lower than the set value, the second stop valve 9 is opened to heat the cover plate of the tunnel-type tempering machine to keep the temperature of the cover plate of the tunnel-type tempering machine constant.

[0035] The end of the steam main pipeline 1 along the steam flow direction is connected to the first steam branch pipe 2 and the second steam branch pipe 3, and the other end is connected to a steam source. The steam source delivers high-temperature steam to the first steam branch pipe 2 and the second steam branch pipe 3 through the steam main pipeline 1. The steam main pipeline 1 is connected in series with a vapor-liquid separator 5, a first stop valve 6 and a filter 7 in sequence along the steam flow direction. The vapor-liquid separator 5 is used to separate the incoming steam from water vapor to prevent the tobacco from getting damp due to excessive steam humidity. At the same time, the processed steam flows to the filter 7 for filtration to ensure the cleanliness of the steam blown to the material pipeline and prevent the tobacco from being contaminated.

[0036] The first steam branch pipe 2 is connected in series with a pneumatic diaphragm valve 11, a pressure transmitter 12, a pressure gauge 8 and a first check valve 13 in the direction of steam flow; the pressure transmitter 12 and the pressure gauge 8 are both electrically connected to the controller. The steam pressure on the first steam branch pipe 2 is adjusted by the pressure transmitter 12 to ensure that the steam pressure meets the process requirements. The pressure gauge 8 is used to detect the steam pressure value adjusted by the pressure transmitter 12.

[0037] The second stop valve 14, the steam pneumatic valve 20 and the steam heat exchanger 21 are connected in series in the second steam branch pipe 3 in the direction of steam flow; the steam pneumatic valve 20 is electrically connected to the controller. The second stop valve 14 controls the on-off of the steam in the second steam branch pipe 3, and the steam pneumatic valve 20 can control the amount of steam in the second steam branch pipe 3, thereby controlling the temperature of the steam heat exchanger 21.

[0038] The spraying assembly includes a compressed air spraying assembly and a steam spraying assembly. The steam spraying assembly is installed at the bottom of the rehumidification cylinder 22 of the tunnel-type tobacco stem rehumidification machine, and is connected to the steam main pipeline 1 through the first steam branch pipe 2.

[0039] The steam spraying assembly includes a plurality of branch pipes connected to the end of the first steam branch pipe 2 along the steam flow direction, and the ends of the plurality of branch pipes are connected to nozzles 18. The steam source enters the plurality of branch pipes through the steam main pipe 1 and the first steam branch pipe 2, and sprays steam to the material in the rehumidification cylinder 22 through the nozzles 18 on the branch pipes; a third stop valve 10 is provided on the plurality of branch pipes, and some nozzles 18 can be opened or closed according to actual conditions. The plurality of steam nozzles 18 are evenly distributed inside the rehumidification cylinder 22 along the direction of material flow, so that the material can be fully mixed with the high-temperature steam during the flow process, so that the material reaches the moisture content under the set steam pressure.

[0040] The compressed air blowing assembly is installed at the outlet of the rehumidification cylinder 22 of the tunnel-type tobacco stem rehumidification machine. The compressed air blowing device includes a compressed air pipeline 4. The end of the compressed air pipeline 4 along the direction of compressed air flow is equipped with a nozzle 18, which can evenly blow compressed air onto the tobacco stems to remove the moisture on the surface of the tobacco stems and reduce the impact on the data collected by the moisture meter on the rear side. A compressed air heating device 19 is installed on the compressed air pipeline 4, which can heat the injected compressed air to prevent the temperature of the tobacco stems from being reduced while removing the moisture on the surface of the tobacco stems, thereby affecting the heating effect and internal moisture content of the tunnel-type tobacco stem rehumidification machine. The compressed air heating device 19 is electrically connected to the controller, and the heating temperature is set by the controller according to the temperature of the steam and the temperature that the tobacco stems need to reach after heating and humidification. A moisture meter is also provided at the outlet of the rehumidification cylinder 22 of the tunnel-type tobacco stem rehumidification machine, and the moisture meter is arranged on the rear side of the compressed air blowing device. The moisture meter collects the moisture content of the material whose surface moisture is dried by compressed air, and feeds it back to the controller for moisture content control.

[0041] It also includes a condensate discharge assembly, which includes a condensate discharge pipeline 15, one end of which is connected to the vapor-liquid separator 5, and the other end is a condensate discharge end. The condensate discharge pipeline 15 is connected in series with a fourth stop valve 16, a steam trap 17 and a second check valve 14 in the direction of condensate discharge.

[0042] The present invention provides a moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine. By adding a moisture control device, the moisture fluctuation of the tobacco stems after pressurized conditioning is reduced, the moisture content of the raw stem shreds is effectively stabilized, the moisture qualification rate of the materials after stem pressing and stem cutting is improved, and the product quality of the pressed tobacco stems and cut stem shreds is improved.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine, It is characterized in that It includes a heating device, a blowing assembly and a controller; The heating device is installed at the cover plate of the moisture reconditioning cylinder of the tunnel-type tobacco stem moisture reconditioning machine, and is connected to the steam main pipeline through the second steam branch pipe; The spray assembly includes a compressed air spray assembly and a steam spray assembly. The steam spray assembly is installed at the bottom of the rehumidification cylinder of the tunnel-type tobacco stem rehumidification machine and is connected to the steam main pipeline through the first steam branch pipe. The compressed air spray assembly is installed at the outlet of the rehumidification cylinder of the tunnel-type tobacco stem rehumidification machine. The heating device and the blowing assembly are both electrically connected to the controller.

2. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 1, It is characterized in that The end of the steam main pipeline along the steam flow direction is connected to the first steam branch pipe and the second steam branch pipe, and the other end is connected to the steam source; The steam main pipeline is connected in series with a steam-liquid separator, a first stop valve and a filter in sequence along the steam flow direction.

3. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 1, It is characterized in that The steam spraying assembly comprises a plurality of branch pipelines connected to the ends of the first steam branch pipe along the steam flow direction, and the ends of the plurality of branch pipelines are all connected to spray heads; A third stop valve is provided on each of the plurality of branch pipelines.

4. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 1, It is characterized in that It also includes a condensate discharge component, which includes a condensate discharge pipeline. One end of the condensate discharge pipeline is connected to a gas-liquid separator, and the other end is a condensate discharge end.

5. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 4, It is characterized in that The condensate discharge pipeline is serially connected with a fourth stop valve, a steam trap and a second check valve in sequence along the condensate discharge direction.

6. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 1, It is characterized in that A temperature sensor is provided on the inner surface of the top cover plate of the rehumidification cylinder, and the temperature sensor is electrically connected to the controller.

7. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 1, It is characterized in that The compressed air spraying assembly comprises a compressed air pipeline, and a spray head is installed at the end of the compressed air pipeline along the direction of compressed air flow; A compressed air heating device is installed on the compressed air pipeline.

8. The moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine according to claim 1, It is characterized in that A moisture meter is also provided at the outlet of the moisture conditioning cylinder of the tunnel-type tobacco stem conditioning machine, and the moisture meter is arranged on the rear side of the compressed air blowing assembly.

9. A moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine as claimed in claim 2, It is characterized in that The first steam branch pipe is serially connected with a pneumatic diaphragm valve, a pressure transmitter, a pressure gauge and a first check valve in sequence along the steam flow direction; The pressure transmitter and the pressure gauge are both electrically connected to the controller.

10. The moisture control device at the outlet of a tunnel-type tobacco stem conditioning machine according to claim 2, It is characterized in that The second steam branch pipe is connected in series with a second stop valve, a steam pneumatic valve and a steam heat exchanger in sequence along the steam flow direction; The steam pneumatic valve is electrically connected to the controller.

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