A system for improving hot air temperature stability of a sheet drying machine

Abstract

The utility model belongs to the tobacco industry silk making equipment technical field, concretely speaking it is a kind of thin plate drying engine hot air temperature stability promotion system, including steam-water separating device, pressure reducing valve, pressure gauge, pneumatic diaphragm valve, heat exchange fan, steam pipeline condensate recovery subassembly, drying cylinder, temperature sensor, data processor, PLC controller, the pressure reducing valve, pressure gauge and pneumatic diaphragm valve are all installed on steam pipeline, the pneumatic diaphragm valve controls steam flow by control opening, and then controls heat exchange fan work adjustment hot air temperature, the heat exchange fan provides process hot air for cylinder drying by the natural wind of steam heating fan, by setting pressure stabilizing system, can guarantee hot air temperature steam pipeline pressure stability, effectively avoid the steam pipeline flow fluctuation of hot air temperature, and then reduce the fluctuation of pneumatic diaphragm valve opening degree, to improve thin plate drying engine hot air temperature stability, guarantee product quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of tobacco processing equipment, specifically a system for improving the hot air temperature stability of a thin plate drying machine. Background Technology

[0002] In the tobacco industry, tobacco processing equipment is the core component of cigarette production. Its performance directly affects the quality of tobacco, production efficiency, and product stability, including tobacco drying machines.

[0003] Chinese patent CN205962799U discloses a device for stabilizing the moisture content of tobacco raw materials. This device includes a rehumidifier and an airflow dryer connected by a conveyor belt. The conveyor belt is equipped with a phototube and a moisture detector. The airflow dryer is controlled based on the data obtained from the phototube and the moisture detector. This application, through the combined adjustment of the rehumidifier and the airflow dryer, and by adopting a stepped water addition method at the feed head and appropriately modifying the drying airflow temperature in the initial stage of drying, reduces the fluctuation and lag of the drying system, effectively reducing the phenomenon of high moisture content at the feed head and ensuring the consistency of tobacco raw material moisture. Because the modification is relatively simple and the quality effect is relatively stable, it has good practicality and applicability.

[0004] As mentioned above, the patent provides a device for stabilizing the moisture content of tobacco drying, which can reduce the fluctuation and lag of the drying system, effectively reduce the phenomenon of high moisture content at the head of the material, and ensure the consistency of the moisture content of the tobacco raw materials. However, the steam pipelines for the cylinder wall temperature and the hot air temperature are interconnected. Therefore, whenever the flow rate of the steam control pipeline for the cylinder wall temperature is adjusted, the flow rate of the steam pipeline for the hot air temperature will also change, which will cause fluctuations in the hot air temperature. This chain reaction has a potential impact on the drying effect and the final product quality.

[0005] Therefore, a system for improving the hot air temperature stability of a thin plate wire drying machine is proposed to address the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies and the problem that the steam pipelines controlling the cylinder wall temperature and the hot air temperature are interconnected, resulting in fluctuations in the hot air temperature when the flow rate of the steam control pipeline for the cylinder wall temperature is adjusted, thus potentially affecting the drying effect and the final product quality, a system for improving the stability of the hot air temperature in a thin sheet drying machine is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is: the hot air temperature stability improvement system of the thin plate drying machine described in this utility model includes a steam-water separation device, a pressure reducing valve, a pressure gauge, a pneumatic diaphragm valve, a heat exchange fan, a steam pipeline condensate recovery component, a drying drum, a temperature sensor, a data processor, and a PLC controller. The pressure reducing valve, pressure gauge, and pneumatic diaphragm valve are all installed on the steam pipeline. The pneumatic diaphragm valve controls the steam flow by controlling the opening degree, and then controls the operation of the heat exchange fan to regulate the hot air temperature. The heat exchange fan provides process hot air for the drum drying wire by heating the natural air of the fan with steam; The temperature sensor is used to monitor the temperature of the hot air inside the drying drum, and the data processor feeds the signal back to the PLC controller, which is used to control the opening degree of the pneumatic diaphragm valve.

[0008] Preferably, the pressure gauge is installed on the steam pipeline after the pressure reducing valve, and the pressure of the steam pipeline after pressure reduction by the pressure reducing valve is 0.5 MPa, thus stabilizing the steam pipeline pressure of the heat exchanger.

[0009] Preferably, the pressure reducing valve is a pilot-operated pressure reducing valve, and the pressure gauge is a shockproof pressure gauge.

[0010] Preferably, the steam pipeline condensate recovery assembly is connected to the heat exchange fan, and the steam pipeline condensate recovery assembly includes a shut-off valve, a steam trap, a check valve, a condensate recovery tank, and a recovery pump.

[0011] Preferably, the condensate is recovered sequentially through a shut-off valve, a steam trap, a check valve, a condensate recovery tank, and a recovery pump, and the shut-off valve, steam trap, check valve, condensate recovery tank, and recovery pump are connected sequentially through pipelines.

[0012] Preferably, the pressure reducing valve includes a valve body, a support base is fixedly connected to the bottom of the valve body, and an inlet pipe and a outlet pipe are respectively connected to both sides of the valve body. A flange is fixedly connected to the end of the inlet pipe and the outlet pipe away from the valve body.

[0013] The beneficial effects of this utility model are: This utility model provides a system for improving the hot air temperature stability of a thin plate wire drying machine. By setting up a pressure stabilization system, the pressure of the hot air temperature steam pipeline can be kept stable, effectively avoiding fluctuations in the flow rate of the hot air temperature steam pipeline, thereby reducing fluctuations in the opening of the pneumatic diaphragm valve, thus improving the hot air temperature stability of the thin plate wire drying machine and ensuring product quality. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a system flowchart of this utility model; Figure 2 This is a first perspective view of the pressure reducing valve in this utility model; Figure 3 This is a second perspective view of the pressure reducing valve in this utility model; Legend: 1. Gas-water separator; 2. Pressure reducing valve; 3. Pressure gauge; 4. Pneumatic diaphragm valve; 5. Heat exchange fan; 6. Shut-off valve; 7. Steam trap; 8. Check valve; 9. Condensate recovery tank; 10. Recovery pump; 11. Drying roller; 12. Temperature sensor; 13. Data processor; 14. PLC controller; 200. Valve body; 201. Support base; 202. Inlet pipe; 203. Discharge pipe; 204. Flange. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Specific implementation examples are given below.

[0017] Please see Figures 1-3 This utility model provides a system for improving the hot air temperature stability of a thin plate drying machine, including a steam-water separation device 1, a pressure reducing valve 2, a pressure gauge 3, a pneumatic diaphragm valve 4, a heat exchange fan 5, a steam pipeline condensate recovery assembly, a drying drum 11, a temperature sensor 12, a data processor 13, and a PLC controller 14. Pressure reducing valve 2, pressure gauge 3 and pneumatic diaphragm valve 4 are all installed on the steam pipeline. Pneumatic diaphragm valve 4 controls the steam flow by controlling the opening degree, and then controls the operation of heat exchange fan 5 to regulate the hot air temperature. The heat exchange fan 5 provides process hot air for the drum drying wire by heating the natural air of the fan with steam; Temperature sensor 12 is used to monitor the hot air temperature inside the drying roller 11. Data processor 13 feeds the signal back to PLC controller 14, which controls the opening degree of pneumatic diaphragm valve 4. During operation, Furthermore, pressure gauge 3 is installed on the steam pipeline after pressure reducing valve 2. The pressure in the steam pipeline after pressure reduction by pressure reducing valve 2 is 0.5 MPa, stabilizing the steam pipeline pressure of the heat exchanger. Pressure reducing valve 2 is a pilot-operated pressure reducing valve, and pressure gauge 3 is a shockproof pressure gauge. The steam pipeline condensate recovery assembly is connected to the heat exchange fan 5. The steam pipeline condensate recovery assembly includes a shut-off valve 6, a steam trap 7, a check valve 8, a condensate recovery tank 9, and a recovery pump 10. Condensate is recovered sequentially through shut-off valve 6, steam trap 7, check valve 8, condensate recovery tank 9, and recovery pump 10. Shut-off valve 6, steam trap 7, check valve 8, condensate recovery tank 9, and recovery pump 10 are sequentially connected by pipelines. During operation, Furthermore, such as Figure 2 and Figure 3 As shown, the pressure reducing valve 2 includes a valve body 200. A support base 201 is fixedly connected to the bottom of the valve body 200. An inlet pipe 202 and a outlet pipe 203 are respectively connected to both sides of the valve body 200. A flange 204 is fixedly connected to the end of the inlet pipe 202 and the outlet pipe 203 away from the valve body 200. During operation, the support base 201 supports the valve body 200. The inlet pipe 202 introduces gas into the valve body 200 and then discharges it from the outlet pipe 203. Meanwhile, the flange 204 facilitates the connection and fixation of the inlet pipe 202 and the outlet pipe 203 to external pipelines.

[0018] Since the steam pipes for the cylinder wall temperature and the hot air temperature of the thin plate drying machine are interconnected, whenever the flow rate of the steam control pipe for the cylinder wall temperature is adjusted, the flow rate of the steam pipe for the hot air temperature will also change, which will cause fluctuations in the hot air temperature. This chain reaction has a potential impact on the drying effect and the final product quality. During use, a separate pressure stabilization system is added to the steam pipeline system. This system mainly consists of a pressure reducing valve 2, a pressure gauge 3, a pneumatic diaphragm valve 4, a heat exchange fan 5, a steam pipeline condensate recovery assembly, a drying roller 11, a temperature sensor 12, a data processor 13, and a PLC controller 14. After pressure reduction, the steam pipeline pressure is 0.5 MPa, stabilizing the steam pipeline pressure of the heat exchanger and controlling the steam flow rate. This controls the operation of the heat exchange fan 5 and adjusts the hot air temperature. When the temperature sensor 12 monitors the hot air temperature of the drying roller 11, the data is processed and fed back to the PLC controller 14. The PLC controller 14 then controls the opening of the pneumatic diaphragm valve 4. Because the pipeline steam pressure is stable, the heat exchange fan 5 operates stably, the hot air is also stable, and the opening of the pneumatic diaphragm valve 4 will not fluctuate. This improves the stability of the hot air temperature of the thin plate drying machine and ensures product quality.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A system for improving the hot air temperature stability of a thin plate wire drying machine, characterized in that: Includes a steam-water separator (1), a pressure reducing valve (2), a pressure gauge (3), a pneumatic diaphragm valve (4), a heat exchange fan (5), a steam pipeline condensate recovery assembly, a wire drying roller (11), a temperature sensor (12), a data processor (13), and a PLC controller (14). The pressure reducing valve (2), pressure gauge (3) and pneumatic diaphragm valve (4) are all installed on the steam pipeline. The pneumatic diaphragm valve (4) controls the steam flow by controlling the opening degree, and then controls the heat exchange fan (5) to work and adjust the hot air temperature. The heat exchange fan (5) provides process hot air for the drum drying wire by steam heating the natural wind of the fan; The temperature sensor (12) is used to monitor the hot air temperature inside the drying roller (11), and the data processor (13) feeds the signal back to the PLC controller (14), which is used to control the opening degree of the pneumatic diaphragm valve (4).

2. The hot air temperature stability improvement system for a thin plate wire drying machine according to claim 1, characterized in that: The pressure gauge (3) is installed on the steam pipeline after the pressure reducing valve (2). The pressure of the steam pipeline after the pressure reducing valve (2) is reduced is 0.5 MPa, which stabilizes the steam pipeline pressure of the heat exchanger.

3. The hot air temperature stability improvement system for a thin plate wire drying machine according to claim 1, characterized in that: The pressure reducing valve (2) is a pilot-operated pressure reducing valve, and the pressure gauge (3) is a shockproof pressure gauge.

4. The hot air temperature stability improvement system for a thin plate wire drying machine according to claim 1, characterized in that: The steam pipeline condensate recovery assembly is connected to the heat exchange fan (5). The steam pipeline condensate recovery assembly includes a shut-off valve (6), a drain valve (7), a check valve (8), a condensate recovery tank (9), and a recovery pump (10).

5. The hot air temperature stability improvement system for a thin plate wire drying machine according to claim 4, characterized in that: The condensate is recovered sequentially through a shut-off valve (6), a steam trap (7), a check valve (8), a condensate recovery tank (9), and a recovery pump (10). The shut-off valve (6), the steam trap (7), the check valve (8), the condensate recovery tank (9), and the recovery pump (10) are connected sequentially through pipelines.

6. The hot air temperature stability improvement system for a thin plate wire drying machine according to claim 1, characterized in that: The pressure reducing valve (2) includes a valve body (200), a support base (201) is fixedly connected to the bottom of the valve body (200), and an inlet pipe (202) and a outlet pipe (203) are respectively connected to both sides of the valve body (200). A flange (204) is fixedly connected to the end of the inlet pipe (202) and the outlet pipe (203) away from the valve body (200).

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