Gas pressurization system for tobacco treatment

Abstract

The utility model provides a gas pressurization system for tobacco processing, and belongs to the technical field of tobacco processing. The gas pressurization system comprises a reaction kettle used for containing tobacco, the reaction kettle is provided with a gas inlet allowing pressurized gas to enter the reaction kettle, the gas pressurization system further comprises a pre-storage tank used for storing the pressurized gas and a first pressure detection device used for detecting the gas pressure in the pre-storage tank, a gas outlet pipe used for introducing pressurized gas in the pre-storage tank into the reaction kettle is connected between the pre-storage tank and the gas inlet of the reaction kettle, a gas outlet valve is mounted on the gas outlet pipe, and a gas supplementing structure used for being connected with pressurized gas supply equipment so as to supplement the pressurized gas into the pre-storage tank when the gas pressure in the pre-storage tank is lower than a set value is arranged on the pre-storage tank. The pre-storage tank is used for storing pressurized gas, the gas storage capacity of the pre-storage tank is large, and the reaction kettle can be rapidly pressurized, so that the effect of regulating and controlling the endogenous browning reaction is improved, the production cycle is shortened, and the industrial production requirement is met.

Description

Technical Field

[0001] The utility model relates to a gas pressurizing system for tobacco processing, belonging to the technical field of tobacco processing. Background Art

[0002] Tobacco processing involves high temperature and high humidity processes such as leaf moistening and re-roasting in the re-roasting process, moisture regain, adding materials, and drying of silk in the silk making process. In these key processes, the endogenous browning reaction of tobacco proceeds rapidly, which in turn has a significant impact on the color and aroma of tobacco products. How to control the process parameters of key processes so that the endogenous browning reaction of tobacco can proceed in a controllable manner is an important proposition in tobacco technology. Studies have found that in addition to traditional temperature and humidity control, increasing the ambient gas pressure of high temperature and high humidity tobacco helps maintain color and enhance aroma.

[0003] For example, a method for improving tobacco quality is disclosed in a Chinese invention patent application with application publication number CN115299631A, which is to add tobacco materials with a certain moisture content into a reactor preheated to a certain temperature, open the air inlet valve to introduce pressurized gas into the reactor (implying that the reactor has an air inlet for high-pressure gas to enter the reactor), and after a certain period of time, open the exhaust valve to discharge the gas in the reactor (implying that the reactor has an exhaust port for the gas after tobacco treatment to be discharged), and improve the directional control ability of the endogenous browning reaction of tobacco by pressurized gas, thereby improving the quality of tobacco. Among them, the pressurized gas is composed of oxygen and non-oxidizing gas, and the non-oxidizing gas can be one or any combination of nitrogen, carbon dioxide, hydrogen, and helium.

[0004] Among them, the method of introducing non-oxidizing gases such as oxygen and nitrogen alone is too expensive for large-scale use, while compressed air has the advantage of being cheap and easy to obtain, and is suitable for industrial production applications. Therefore, the use of compressed air or a mixed pressurized gas mainly composed of compressed air has broad application prospects in tobacco processing. However, in actual production, one problem faced by the large-scale use of compressed air is that the current silk-making capacity of the tobacco industry is thousands or even tens of thousands of kg / h, and there is almost no air compression equipment with matching capacity on the market. If low-power air compression equipment is relied on, the reactor can only be pressurized slowly until the required pressure is reached. This greatly reduces the effect of regulating the endogenous browning reaction on the one hand; on the other hand, the production cycle is extended, which does not meet the requirements of industrial production. Utility Model Content

[0005] The utility model aims to provide a gas pressurizing system for tobacco processing, so as to solve the problem in the prior art that a low-power air compression device is used to slowly pressurize a reactor, resulting in reduced effect of regulating endogenous browning reaction, prolonged production cycle, and failure to meet industrial production requirements.

[0006] In order to achieve the above-mentioned purpose, the gas pressurizing system for tobacco processing in the utility model adopts the following technical solutions:

[0007] A gas pressurizing system for tobacco processing, the gas pressurizing system includes a reactor for accommodating tobacco, the reactor having an air inlet for pressurized gas to enter the reactor, the gas pressurizing system also includes a pre-storage tank for storing pressurized gas and a first pressure detecting device for detecting the gas pressure in the pre-storage tank, an outlet pipe for passing the pressurized gas in the pre-storage tank into the reactor is connected between the pre-storage tank and the air inlet of the reactor, an outlet valve is installed on the outlet pipe, and the pre-storage tank is provided with a gas replenishing structure for connecting a pressurized gas supply device to replenish pressurized gas therein when the gas pressure in the pre-storage tank is lower than a set value.

[0008] The beneficial effect of the above technical scheme is that: the utility model proposes an improved gas pressurizing system for tobacco processing, the improvement is that the gas pressurizing system comprises a pre-storage tank for storing pressurized gas and a first pressure detecting device for detecting the gas pressure in the pre-storage tank, the pre-storage tank can store enough pressurized gas to meet the required pressure of the reactor, and the first pressure detecting device can be used to know whether the gas pressure in the pre-storage tank meets the requirement; an outlet pipe for passing the pressurized gas in the pre-storage tank into the reactor is connected between the pre-storage tank and the air inlet of the reactor, and an outlet valve is installed on the outlet pipe, and the pressurized gas can be passed into the reactor through the outlet pipe by opening the outlet valve. Since the amount of pressurized gas stored in the pre-storage tank is large and the pressure meets the requirements of the reactor, the reactor can be quickly pressurized, thereby improving the effect of regulating the endogenous browning reaction, while shortening the production cycle, meeting the requirements of industrial production. In addition, the pre-storage tank is connected to the pressurized gas supply equipment through an air replenishing structure. When the first pressure detection device detects that the gas pressure in the pre-storage tank is lower than the set value, the pressurized gas can be added to the pre-storage tank through the air replenishing structure to maintain the gas pressure in the pre-storage tank to meet the required pressure of the reactor, thereby realizing industrial continuous production.

[0009] Furthermore, the reactor also has an exhaust port for the gas after tobacco treatment to discharge from the reactor. A recovery pipe for recovering the gas after tobacco treatment into the pre-storage tank is connected between the pre-storage tank and the exhaust port of the reactor. A booster pump, a recovery valve and a filter for filtering impurities in the gas are installed on the recovery pipe.

[0010] Furthermore, the filter includes a dust removal filter for filtering solid particles and a water and oil removal filter for filtering water and oil. The dust removal filter is located at one end of the recovery pipe close to the exhaust port of the reactor, and the water and oil removal filter is located downstream of the dust removal filter.

[0011] Furthermore, the booster pump is located between the dust removal filter and the water and oil removal filter.

[0012] Furthermore, two recovery valves are provided, and the booster pump is located between the two recovery valves.

[0013] Furthermore, a pressure reducing valve is installed on the air outlet pipe.

[0014] Furthermore, two air outlet valves are provided, and the pressure reducing valve is located between the two air outlet valves.

[0015] Furthermore, a second pressure detection device for detecting the gas pressure in the reactor is installed at one end of the gas outlet pipe close to the reactor.

[0016] Furthermore, a pressure relief valve is installed on the pre-storage tank.

[0017] Furthermore, the air supply structure includes an air supply pipe and an air supply valve installed on the air supply pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the gas pressurizing system for tobacco processing according to an embodiment of the utility model.

[0019] In the figure: 1. air supply pipe; 11. air supply valve; 2. pre-storage tank; 21. first pressure gauge; 22. pressure relief valve; 3. air outlet pipe; 31. first air outlet valve; 32. pressure reducing valve; 33. second air outlet valve; 34. second pressure gauge; 4. reactor; 5. recovery pipe; 51. dust filter; 52. first recovery valve; 53. booster pump; 54. water and oil removal filter; 55. second recovery valve. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] In view of the technical problems existing in the prior art, the basic technical concept of the utility model is to set up a pre-storage tank for storing pressurized gas. The pre-storage tank is connected to the air inlet of the reactor through an outlet pipe, and the pressurized gas can be passed into the reactor. Since the amount of pressurized gas stored in the pre-storage tank is large and the pressure meets the requirements of the reactor, the reactor can be quickly pressurized. In addition, the utility model is also provided with a first pressure detection device and a gas replenishing structure. When it is detected that the gas pressure in the pre-storage tank is lower than the set value, the pressurized gas is replenished into the pre-storage tank through the gas replenishing structure to keep the gas pressure in the pre-storage tank to meet the required pressure of the reactor.

[0022] Embodiments of the gas pressurizing system for tobacco processing (hereinafter referred to as the gas pressurizing system) in the utility model:

[0023] like Figure 1As shown, the gas pressurization system includes a reactor 4 for containing tobacco and allowing the tobacco to undergo an endogenous browning reaction therein, and the reactor 4 has an air inlet for the pressurized gas to enter the reactor 4 and an exhaust port for the gas after the tobacco treatment to exit the reactor 4. Of course, in order to facilitate the addition and discharge of tobacco, the reactor 4 also has a feed port and a discharge port.

[0024] like Figure 1 As shown, the gas pressurization system also includes a pre-storage tank 2 for storing pressurized gas and a first pressure detection device for detecting the gas pressure in the pre-storage tank 2. In this embodiment, the first pressure detection device is a first pressure gauge 21 installed on the pre-storage tank 2. The first pressure gauge 21 can directly display the gas pressure in the pre-storage tank 2, which is convenient for the operator to observe.

[0025] An outlet pipe 3 for passing the pressurized gas in the pre-storage tank 2 into the reactor 4 is connected between the pre-storage tank 2 and the air inlet of the reactor 4, and an outlet valve is installed on the outlet pipe 3. By opening the outlet valve, pressurized gas can be passed into the reactor 4 through the outlet pipe 3. The volume of the pre-storage tank 2 can be set according to actual production to ensure that the amount of pressurized gas stored is large and the pressure meets the needs of the reactor 4, thereby achieving rapid pressurization of the reactor 4, improving the effect of regulating the endogenous browning reaction, and shortening the production cycle, meeting the requirements of industrial production. Generally speaking, the larger the volume of the pre-storage tank 2, the stronger its stable and rapid gas supply capacity, but the site requirements are relatively high.

[0026] The pre-storage tank 2 is provided with a gas replenishing structure for connecting the pressurized gas supply device to replenish the pressurized gas therein when the gas pressure in the pre-storage tank 2 is lower than the set value. In this embodiment, the gas replenishing structure includes a gas replenishing pipe 1 and a gas replenishing valve 11 installed on the gas replenishing pipe 1. The gas replenishing pipe 1 is connected to the pressurized gas supply device. When the first pressure gauge 21 detects that the gas pressure in the pre-storage tank 2 is lower than the set value, the gas replenishing valve 11 can be opened to allow the pressurized gas supply device to replenish the pressurized gas into the pre-storage tank 2 until the first pressure gauge 21 shows that the pressure in the tank reaches the set pressure range, so as to maintain the gas pressure in the pre-storage tank 2 to meet the required pressure of the reactor 4, and realize industrial continuous production. Among them, the set pressure range of the pre-storage tank 2 has an upper limit value and a lower limit value. The lower limit value is the above-mentioned set value, which is the minimum value that can meet the required pressure of the reactor 4, and the upper limit value is a safety value to ensure the safety of the tank body under pressure. Therefore, in order to avoid excessive gas pressure in the pre-storage tank 2 and to facilitate pressure relief when necessary to ensure the safety of the tank body, a pressure relief valve 22 is also installed on the pre-storage tank.

[0027] It should be noted that the pressurized gas referred to in the present invention refers to compressed air with a pressure higher than 1 standard atmospheric pressure or a mixture of compressed air and other gases. Other gases generally use one of nitrogen or oxygen, which can adjust the oxygen content in the mixed gas after mixing with compressed air. The pressurized gas provided by the pressurized gas supply equipment must be dust-removed, dehydrated and degreased before entering the pre-storage tank 2 to ensure that it will not have a negative impact on the quality of tobacco and reduce the impact on the moisture content of tobacco. In addition, the gas pressure P in the pre-storage tank 2 预 Lower than the supply pressure P of the pressurized gas supply equipment 供 , and at the same time higher than the set pressure P of the gas in the reactor 4 反 , that is, P 供 >P 预 >P 反 >1 standard atmosphere.

[0028] Because P 预 >P 反 Therefore, a pressure reducing valve 32 is also installed on the gas outlet pipe 3, and the pressure of the gas entering the reactor 4 can be adjusted by the pressure reducing valve 32. At the same time, a second pressure detection device for detecting the gas pressure in the reactor 4 is installed on one end of the gas outlet pipe 3 close to the reactor 4. The second pressure detection device in this embodiment is a second pressure gauge 34, so as to directly observe the gas pressure value in the reactor 4. In addition, there are two gas outlet valves, namely the first gas outlet valve 31 and the second gas outlet valve 33. The pressure reducing valve 32 is located between the first gas outlet valve 31 and the second gas outlet valve 33, which is convenient for cutting off the pipelines at both ends of the pressure reducing valve 32 during maintenance to prevent gas leakage. In addition, the first gas outlet valve 31 is arranged close to the pre-storage tank 2, the second gas outlet valve 33 is arranged close to the reactor 4, and the second pressure gauge 34 is located between the reactor 4 and the second gas outlet valve 33, ensuring that the gas pressure in the reactor 4 can still be detected when the second gas outlet valve 33 is in a closed state.

[0029] like Figure 1 As shown, a recovery pipe 5 for recovering the gas after tobacco treatment to the pre-storage tank 2 is connected between the pre-storage tank 2 and the exhaust port of the reactor 4. The recovery of the gas can avoid gas waste on the one hand, and relieve the pressure of the pressurized gas supply equipment on the other hand, thereby improving the scale production efficiency. Specifically, a booster pump 53, a recovery valve and a filter are installed on the recovery pipe 5. 预 >P 反Therefore, the booster pump 53 can be used to boost the relatively low pressure pressurized gas in the reactor 4 before entering the pre-storage tank 2, otherwise the gas cannot be recovered to the pre-storage tank 2 autonomously. It should be noted that the smaller the volume of the pre-storage tank 2, the greater the difference between the gas pressure in the tank and the set pressure of the gas in the reactor 4, which will reduce the efficiency of pressurized gas recovery. Therefore, under the premise of meeting the site requirements, a large volume pre-storage tank 2 can be configured as much as possible according to actual production needs.

[0030] Since the gas after tobacco treatment in the reactor 4 contains impurities, the impurities can be filtered by a filter to ensure the quality of the gas recovered in the pre-storage tank 2 and avoid negative impact on the quality of tobacco during recycling. Specifically, the filter includes a dust removal filter 51 for filtering solid particles and a water removal and oil removal filter 54 for filtering water and oil. The dust removal filter 51 is located at one end of the recovery pipe 5 close to the exhaust port of the reactor 4, and the water removal and oil removal filter 54 is located downstream of the dust removal filter 51. The dust removal filter 51 first intercepts the solid particles in the recovered gas to reduce the impact on the recovery pipe 5 and the downstream valve parts. The water removal and oil removal filter 54 can reduce the moisture and oil content in the recovered gas and improve the quality of the recovered gas. Further, the water removal and oil removal filter 54 is located in the middle section of the entire recovery pipe 5, and the booster pump 53 is located between the dust removal filter 51 and the water removal and oil removal filter 54, so that the water and oil vapor in the gas can be fully cooled to form liquid, which is convenient for the water removal and oil removal filter 54 to filter.

[0031] Furthermore, the above-mentioned recovery valve is provided with two, namely, the first recovery valve 52 and the second recovery valve 55. The first recovery valve 52 is arranged near the reactor 4, and the second recovery valve 55 is arranged near the pre-storage tank 2. The booster pump 53 is located between the first recovery valve 52 and the second recovery valve 55. In combination with the above introduction, it is specifically located between the first recovery valve 52 and the water and oil removal filter 54, so as to facilitate the maintenance of the booster pump 53 and the water and oil removal filter 54 by cutting off the pipelines at both ends thereof to prevent gas leakage. In addition, the first recovery valve 52, the second recovery valve 55, the first outlet valve 31, the second outlet valve 33 and the air supply valve 11 in the utility model are all stop valves, with low configuration cost and convenient operation.

[0032] The working principle of the gas pressurization system in the utility model is as follows:

[0033] When in use, close the first gas outlet valve 31, the second recovery valve 55, and the pressure relief valve 22, open the gas supply valve 11, and the pressurized gas supply device slowly introduces pressurized gas into the pre-storage tank 2. The first pressure gauge 21 shows the pressure P in the pre-storage tank 2. 预After reaching the set pressure range, close the air supply valve 11, add high-temperature and high-humidity tobacco to the reactor 4, keep the reactor 4 airtight and the first recovery valve 52 closed, then open the first outlet valve 31 and the second outlet valve 33, and the pressurized gas enters the reactor 4 through the outlet pipe 3 and the pressure reducing valve 32. The timing starts after the second pressure gauge 34 shows that the set pressure has been reached. When the tobacco processing time is over, close the second outlet valve 33 and the first outlet valve 31 in turn, open the first recovery valve 52 and the second recovery valve 55 in turn, and the booster pump 53 starts working. The gas passes through the dust removal filter 51 and the water and oil removal filter 54 in the recovery pipe 5 to form a recovered gas that meets the quality requirements and returns to the pre-storage tank 2. After the booster pump 53 stops pumping, close the first recovery valve 52 and the second recovery valve 55 on the recovery pipe 5, and open the discharge port of the reactor 4 to release the processed tobacco. If the pressure P in the pre-storage tank 2 预 When the pressure is lower than the set pressure range, close the first outlet valve 31, the second recovery valve 55, and the pressure relief valve 22, open the air supply valve 11, and slowly introduce the pressurized gas into the pre-storage tank 2 by the pressurized gas supply device until the first pressure gauge 21 shows the pressure P in the tank. 预 Reach the set pressure range.

[0034] In other embodiments of the gas pressurization system for tobacco processing: the gas supply structure can be a gas supply valve directly installed on the pre-storage tank, and the gas supply valve has an interface that can be connected to the pressurized gas supply equipment.

[0035] In other embodiments of the gas pressurization system for tobacco processing: the first pressure detection device may also be a first pressure sensor, the first pressure sensor transmits the detection signal to the background controller, and the background controller displays it through the display screen after processing. In other embodiments, regardless of whether the first pressure detection device is a first pressure gauge or a first pressure sensor, the first pressure detection device may be arranged on the outlet pipe or the recovery pipe, and of course, it needs to be arranged close to the tank body of the pre-storage tank.

[0036] In other embodiments of the gas pressurization system for tobacco processing: the pre-storage tank may not be provided with a pressure relief valve. In this case, during the gas replenishment process, it is necessary to monitor the pressure in the tank in real time through the first pressure detection device. When the pressure reaches the set pressure range, the gas replenishment is stopped in time.

[0037] In other embodiments of the gas pressurization system for tobacco processing: the second pressure detection device can also be a second pressure sensor, and the second pressure sensor transmits the detection signal to the background controller, and the background controller displays it through the display screen after processing. In other embodiments, no matter whether the second pressure detection device is a second pressure gauge or a second pressure sensor, the second pressure detection device can be directly installed on the reactor, and of course it can also be installed on the recovery pipe, but it needs to be located upstream of the dust removal filter.

[0038] In other embodiments of the gas pressurizing system for tobacco processing: only one gas outlet valve may be provided, which is located on one side of the pressure reducing valve.

[0039] In other embodiments of the gas pressurization system for tobacco processing: when the pressure difference between the pre-storage tank and the reactor is not very large, a pressure reducing valve may not be provided on the gas outlet pipe. At this time, it is necessary to control the time of introducing pressurized gas into the reactor, or to use a second pressure detection device for detecting the gas pressure in the reactor. When the pressure reaches the set pressure, ventilation is stopped immediately.

[0040] In other embodiments of the gas pressurizing system for tobacco processing, only one recovery valve may be provided, which is located on one side of the booster pump.

[0041] In other embodiments of the gas pressurization system for tobacco processing: the booster pump may also be arranged downstream of the water and oil removal filter.

[0042] In other embodiments of the gas pressurization system for tobacco processing: the dust removal filter and the water and oil removal filter can be arranged in the middle section of the recovery pipe; in other embodiments, only one filter can be set on the recovery pipe, which is a comprehensive filter for dust removal, water removal and oil removal.

[0043] In other embodiments of the gas pressurization system for tobacco processing: a recovery pipe may not be provided, and correspondingly, a booster pump, a recovery valve and a filter may not be provided. At this time, after the tobacco processing in the reactor is completed, the waste gas can be directly discharged into the atmosphere through the exhaust port.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas pressurization system for tobacco processing, the gas pressurization system comprising a reactor for containing tobacco, the reactor having an air inlet for pressurized gas to enter the reactor, characterized in that: The gas pressurization system also includes a pre-storage tank for storing pressurized gas and a first pressure detection device for detecting the gas pressure in the pre-storage tank. An outlet pipe for passing the pressurized gas in the pre-storage tank into the reactor is connected between the pre-storage tank and the air inlet of the reactor. An outlet valve is installed on the outlet pipe. The pre-storage tank is provided with a gas replenishing structure for connecting to a pressurized gas supply device to replenish pressurized gas therein when the gas pressure in the pre-storage tank is lower than a set value.

2. The gas pressurization system for tobacco processing according to claim 1, characterized in that: The reactor also has an exhaust port for the gas after tobacco treatment to be discharged from the reactor. A recovery pipe for recovering the gas after tobacco treatment into the pre-storage tank is connected between the pre-storage tank and the exhaust port of the reactor. A booster pump, a recovery valve and a filter for filtering impurities in the gas are installed on the recovery pipe.

3. The gas pressurizing system for tobacco processing according to claim 2, characterized in that: The filter includes a dust removal filter for filtering solid particles and a water and oil removal filter for filtering water and oil. The dust removal filter is located at one end of the recovery pipe close to the exhaust port of the reactor, and the water and oil removal filter is located downstream of the dust removal filter.

4. The gas pressurizing system for tobacco processing according to claim 3, characterized in that: The booster pump is located between the dust removal filter and the water and oil removal filter.

5. The gas pressurizing system for tobacco processing according to any one of claims 2 to 4, characterized in that: Two recovery valves are provided, and the booster pump is located between the two recovery valves.

6. The gas pressurizing system for tobacco processing according to any one of claims 1 to 4, characterized in that: A pressure reducing valve is also installed on the air outlet pipe.

7. The gas pressurizing system for tobacco processing according to claim 6, characterized in that: Two air outlet valves are provided, and the pressure reducing valve is located between the two air outlet valves.

8. The gas pressurizing system for tobacco processing according to any one of claims 1 to 4, characterized in that: A second pressure detection device for detecting the gas pressure in the reactor is installed on one end of the gas outlet pipe close to the reactor.

9. The gas pressurizing system for tobacco processing according to any one of claims 1 to 4, characterized in that: A pressure relief valve is also installed on the pre-storage tank.

10. The gas pressurizing system for tobacco processing according to any one of claims 1 to 4, characterized in that: The air supply structure comprises an air supply pipe and an air supply valve installed on the air supply pipe.

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