A method and system for detecting processing strength of tobacco material drum rehumidification process

Abstract

The present invention discloses a processing strength detection method and system for a tobacco material drum moisture recovery process, wherein the method comprises: detecting the flow rate, temperature and humidity of the inlet hot air and moisture exhaust gas on the moisture exhaust pipelines at the feed end and the discharge end of the loose moisture recovery drum, and calculating the thermal enthalpy value of the inlet hot air within a preset time period; detecting the flow rate and temperature of saturated steam at the inlet of the steam injection pipeline of the loose moisture recovery drum, and calculating the thermal enthalpy value of the saturated steam injected into the drum within a preset time period; determining the net thermal enthalpy value of the gaseous processing medium input into the drum within a preset time period according to the inlet hot air thermal enthalpy value, the saturated steam thermal enthalpy value and the moisture exhaust gas thermal enthalpy value; calculating the processing strength of the loose moisture recovery process of the tobacco sheets by detecting the flow rate and moisture content of the tobacco sheets at the outlet of the loose moisture recovery drum, and combining the obtained net thermal enthalpy value of the gaseous processing medium input into the drum. The present invention realizes accurate quantitative evaluation of the moisture recovery processing strength of the tobacco drum, and the detection method is simple and easy.

Description

Technical Field

[0001] The invention relates to the field of tobacco processing, and in particular to a method and system for detecting processing strength of a tobacco material drum rehumidification process. Background Art

[0002] The loosening and rehumidification process is an important part of the cigarette shred processing process, which has a great impact on the physical and sensory quality of tobacco. The main task of this process is, on the one hand, to increase the moisture content and temperature of the tobacco slices to a certain level by quantitatively adding water and steam injection, so as to improve the physical processing resistance of the tobacco slices, reduce the crushing in the subsequent processing links, and maximize the silk yield; on the other hand, through the heating and humidification process of the tobacco slices and the mechanical action of the internal components in the loosening equipment, the sliced ​​tobacco slices are fully loosened, so that the wrinkled and curled leaves are stretched out, which is convenient for subsequent uniform feeding. Due to the change in the concept of cigarette processing technology from simply pursuing physical quality to focusing on improving sensory quality in recent years, the new version of the "Cigarette Process Specifications" further puts forward requirements for improving the sensory quality of tobacco slices in the loosening and rehumidification process, that is, through the heat and moisture treatment of the loosening and rehumidification process, the bad qualities such as impurities and irritation in the tobacco slices are reduced, and the sensory quality of cigarette raw materials is improved.

[0003] The drum type loosening and rehydration equipment is the main equipment form widely used in the loosening and rehydration process. After unpacking, the tobacco sheet raw materials are first sliced ​​by a slicer (slicing-loosening and rehydration process) or vacuum rehydration (vacuum rehydration-loosening and rehydration process) for pretreatment, and then sent to the loosening and rehydration drum equipment. Through the application of saturated steam and quantitative atomization water spraying, the tobacco sheet raw materials gradually absorb moisture in the drum, increasing the moisture content and temperature to a certain level. At the same time, during the movement and transmission of the drum from the inlet to the outlet, the tobacco sheet raw materials gradually loosen from the cut blocks under the action of internal components such as the drum wall rake nails, and the leaves also become stretched due to the increase in moisture and temperature. At the same time, since loosening and rehydration is also the main heating process in the silk processing, a series of complex biochemical reactions will occur inside the tobacco leaf raw materials during the thermal processing, which will also affect the aroma style and sensory quality of the tobacco sheets after rehydration. In the drum loosening and rehydration production process, the main equipment system uses the atomization water addition amount and the return air temperature as the main process control factors. Among them, quantitative humidification of the exported tobacco slices is achieved by adjusting the amount of atomized water, and the loosening and rehumidification heat processing intensity is changed by adjusting the return air temperature, so as to achieve a better loosening effect of the tobacco slices and improve their sensory quality.

[0004] In the multi-point production of cigarettes, in order to ensure the consistency of product quality processed at different cigarette production points, especially the consistency of the sensory quality of cigarette products, under the premise of the same raw materials for cigarette production, it is necessary to ensure the consistency of the processing intensity of the key silk-making processes at different processing points, including the loosening and rehumidification process, the leaf drying process, etc. However, due to the variety of tobacco loosening and rehumidification main machine models, there may be large differences in the loosening and rehumidification equipment at different processing points, and there will also be large differences in the environmental medium and steam medium working conditions of each processing point. In this case, only adjusting and controlling the return air temperature of the loosening and rehumidification equipment at different processing points to be the same cannot guarantee the consistency of the heat processing intensity of the tobacco material in the rehumidification drum, and therefore has limited guiding role in applications such as multi-point homogenization processing. Summary of the invention

[0005] In view of the shortcomings of the above-mentioned existing methods, the present invention provides a processing strength detection method and system for the roller moisture conditioning process of tobacco materials. By detecting and analyzing the gas phase thermal enthalpy entering and exiting the roller moisture conditioning equipment during the production process, and combining the flow rate and temperature and humidity changes of the incoming tobacco sheets, the thermal processing strength of the tobacco sheets in the loosening and moisture conditioning process is determined.

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

[0007] A method for detecting processing strength of a tobacco material drum rehumidification process, comprising:

[0008] The flow rate, temperature and humidity of the inlet hot air are continuously and real-time detected at the feeding end of the loosening and rehumidification drum, and the thermal enthalpy value of the inlet hot air within a preset time period is calculated;

[0009] The flow rate and temperature of saturated steam are continuously and real-time detected at the inlet of the steam injection pipeline of the loose rehumidification drum, and the enthalpy value of the saturated steam injected into the drum within a preset time period is calculated;

[0010] The flow rate, temperature and humidity of the exhaust gas are continuously and real-time detected on the exhaust pipeline at the discharge end of the loose rehumidification drum, and the thermal enthalpy value of the exhaust gas within a preset time period is calculated;

[0011] Determine the net enthalpy value of the gas-phase processing medium input into the drum within the preset time period according to the enthalpy value of the hot air at the drum inlet, the enthalpy value of the saturated steam and the enthalpy value of the exhaust moisture within the preset time period;

[0012] The flow rate and moisture content of the tobacco flakes at the outlet of the loosening and rehumidification drum are continuously and real-time detected, and then the processing intensity of the tobacco flake loosening and rehumidification process is calculated by combining the calculated net thermal enthalpy value of the gas phase processing medium input into the drum.

[0013] Furthermore, the calculation method of the hot air enthalpy value at the inlet within the preset time period is:

[0014]

[0015] In the formula, H gasin is the calculated hot air enthalpy value at the inlet during the preset time period, t1 and t2 are the start and end time of the preset time period, V gasin ,T gasin ,X gasin They are respectively the flow rate, temperature and humidity of the inlet hot air detected in real time at the feeding end of the loose rehumidification drum.

[0016] Furthermore, the calculation method of the enthalpy value of the saturated steam injected into the drum within the preset time period is:

[0017]

[0018] In the formula, H steam is the calculated enthalpy value of the saturated steam injected into the drum within the preset time period, V steam ,T steam They are respectively the flow rate and temperature of the saturated steam detected in real time at the inlet of the steam injection pipeline of the loose rehumidification drum.

[0019] Furthermore, the calculation method of the thermal enthalpy value of the moisture exhaust within the preset time period is:

[0020]

[0021] In the formula, H gasout is the calculated enthalpy value of moisture removal within the preset time period, V gasout ,T gasout ,X gasout The flow rate, temperature and humidity of the dehumidified air are respectively detected in real time on the dehumidification pipeline at the discharge end of the loose rehumidification drum.

[0022] Furthermore, the calculation method of the net heat enthalpy value input into the drum by the gas phase processing medium within the preset time period is:

[0023] H total =H gasin +H steam -H gasout

[0024] In the formula, H total is the calculated net enthalpy, H gasin ,H steam ,H gasout They are respectively the enthalpy value of hot air at the drum inlet, the enthalpy value of saturated steam and the enthalpy value of exhaust moisture within a preset time period.

[0025] Furthermore, the calculation method of the processing strength of the loosening and rehumidification process of tobacco sheets is:

[0026]

[0027] Where, Q is the processing intensity of the loosening and rehydration process of tobacco sheets, W, X tobacco are the real-time detected smoke flow rate and moisture content at the exit of the loose rehumidification drum, H total Enter the net enthalpy of the drum for the vapor phase process media.

[0028] Furthermore, the preset time period is determined according to the material unit batch processing time, or according to any time period that is not less than the material roller passing time during the steady-state production process.

[0029] A tobacco material drum rehumidification process processing strength detection system, including a data acquisition unit and a data processing unit;

[0030] The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector arranged on the inlet hot air pipeline of the loose rehumidification drum feed end, which are used to detect the flow, temperature and humidity of the inlet hot air in real time:

[0031] The data acquisition unit includes a gas mass flow detector and a gas phase temperature detector arranged at the inlet of the steam injection pipeline of the loosening and rehumidification drum, which are used to detect the flow and temperature of saturated steam in real time;

[0032] The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector arranged on the dehumidification gas pipeline at the discharge end of the loose rehumidification drum, which are used to detect the flow, temperature and humidity of the dehumidification gas in real time;

[0033] The data acquisition unit includes an electronic belt scale and an online moisture detector, which are arranged at the entrance or exit of the loosening and rehumidification drum, wherein the electronic belt scale is used to detect the flow rate of the tobacco leaves in real time, and the online moisture detector is used to detect the moisture content of the tobacco leaves in real time;

[0034] The data processing unit obtains the real-time detected data from the data acquisition unit, calculates the enthalpy value of the hot air at the inlet, the enthalpy value of the saturated steam injected into the drum, and the enthalpy value of the exhaust moisture within a preset time period; determines the net enthalpy value input into the drum by the gaseous processing medium within the preset time period according to the calculated enthalpy values; calculates the processing intensity of the loosening and rehumidification process of the tobacco leaves according to the net enthalpy value input into the drum by the gaseous processing medium within the preset time period and the real-time detected tobacco leaf flow rate and moisture content.

[0035] Beneficial Effects

[0036] The processing strength detection method and system of the tobacco material drum rehumidification process provided by the present invention have the following advantages:

[0037] 1. An accurate quantitative evaluation of the processing intensity of the tobacco drum moisture recovery has been achieved. In the traditional drum loose moisture recovery process, the equipment's return air temperature process parameters are used to indirectly reflect the material's processing intensity. However, due to differences in the structure of different types of processing equipment and differences in steam injection and moisture exhaust status between equipment, it is difficult to accurately compare and analyze the degree of heat treatment of materials in different processing drums. The present invention simultaneously detects and analyzes the enthalpy values ​​of the circulating inlet hot air, injected steam, and moisture exhaust, and then calculates and determines the material's heat processing intensity. This can not only accurately reflect the heat processing intensity of a single device at a specific time, but can also be used for quantitative comparative analysis of processing intensity between different processing equipment.

[0038] 2. The detection method is simple and easy. The present invention can be realized by only installing corresponding flow rate and temperature and humidity detection devices at the inlet and outlet gas phase processing medium pipelines of the drum, without the need to detect the material heating state inside the drum equipment. DETAILED DESCRIPTION

[0039] The following is a detailed description of an embodiment of the present invention. This embodiment is based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process to further explain the technical solution of the present invention.

[0040] Example 1

[0041] Aiming at the drum loosening and rehydration process of a certain cigarette factory's silk production line, the method provided by the present invention is used to detect and analyze the thermal processing strength of the material processing process, and the implementation steps are as follows:

[0042] 1. During normal production according to the established drum loosening and moisture regaining processing parameters, a gas mass flow detector and a gas phase temperature and humidity detector are respectively installed on the inlet hot air pipeline at the drum feed end and the exhaust air pipeline at the discharge end to detect and collect the flow rate and temperature and humidity of the drum inlet hot air, and the flow rate and temperature and humidity of the drum exhaust air in real time online;

[0043] 2. A steam mass flow detector and a gas phase temperature detector are installed on the saturated steam pipeline injected into the drum to detect and collect the flow rate and temperature of the saturated steam injected into the drum in real time online;

[0044] 3. At the drum material inlet or outlet, an electronic belt scale is used to online detect and collect the material mass flow rate; at the same time, an online moisture detector is set to online detect and collect the moisture content change information of the tobacco leaves at the inlet or outlet;

[0045] 4. The computer obtains the real-time detected data from all the detection devices set up above, and calculates the enthalpy value of the hot air at the inlet, the enthalpy value of the saturated steam injected into the drum, and the enthalpy value of the exhaust moisture within the preset time period:

[0046]

[0047]

[0048]

[0049] In the formula, H gasin is the calculated hot air enthalpy value at the inlet during the preset time period, t1 and t2 are the start and end time of the preset time period, V gasin ,T steam ,X gasin They are the flow rate, temperature and humidity of the inlet hot air detected in real time at the feeding end of the loose rehumidification drum;

[0050] H steam is the calculated enthalpy value of the saturated steam injected into the drum within the preset time period, V steam ,T steam They are the flow rate and temperature of saturated steam detected in real time at the inlet of the steam injection pipeline of the loose rehumidification drum;

[0051] H gasout is the calculated enthalpy value of moisture removal within the preset time period, V gasout ,T gasout ,X gasout The flow rate, temperature and humidity of the dehumidified air are respectively detected in real time on the dehumidification pipeline at the discharge end of the loose rehumidification drum.

[0052] The preset time period may be determined according to the material unit batch processing time, or may be determined according to any time period that is not less than the material roller passing time during a steady-state production process.

[0053] 5. According to the enthalpy values ​​calculated in the previous step, determine the net enthalpy value of the gas-phase processing medium input into the drum within the preset time period:

[0054] H total =H gasin +H steam -H gasout

[0055] In the formula, H total is the calculated net enthalpy, H gasin ,H steam ,H gasout They are respectively the enthalpy value of hot air at the drum inlet, the enthalpy value of saturated steam and the enthalpy value of exhaust moisture within a preset time period.

[0056] 6. Based on the smoke flow rate and moisture content collected by online detection, and the net enthalpy value H of the gaseous processing medium input into the drum within the preset time period calculated in the previous step, total , the processing intensity of the loosening and rehumidification process of tobacco sheets is calculated:

[0057]

[0058] Where, Q is the processing intensity of the loosening and rehydration process of tobacco sheets, W, X tobacco They are respectively the real-time detected flow rate and moisture content of the smoke sheets at the outlet of the loose rehumidification drum.

[0059] Example 2

[0060] This embodiment provides a tobacco material drum moisture conditioning process processing strength detection system, including a data acquisition unit and a data processing unit;

[0061] The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector arranged on the inlet hot air pipeline of the loose rehumidification drum feed end, which are used to detect the flow, temperature and humidity of the inlet hot air in real time:

[0062] The data acquisition unit includes a gas mass flow detector and a gas phase temperature detector arranged at the inlet of the steam injection pipeline of the loosening and rehumidification drum, which are used to detect the flow and temperature of saturated steam in real time;

[0063] The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector arranged on the dehumidification gas pipeline at the discharge end of the loose rehumidification drum, which are used to detect the flow, temperature and humidity of the dehumidification gas in real time;

[0064] The data acquisition unit includes an electronic belt scale and an online moisture detector, which are arranged at the entrance or exit of the loosening and rehumidification drum, wherein the electronic belt scale is used to detect the flow rate of the tobacco leaves in real time, and the online moisture detector is used to detect the moisture content of the tobacco leaves in real time;

[0065] The data processing unit obtains the real-time detected data from the data acquisition unit, calculates the enthalpy value of the hot air at the inlet, the enthalpy value of the saturated steam injected into the drum, and the enthalpy value of the exhaust moisture within a preset time period; determines the net enthalpy value input into the drum by the gaseous processing medium within the preset time period according to the calculated enthalpy values; calculates the processing intensity of the loosening and rehumidification process of the tobacco leaves according to the net enthalpy value input into the drum by the gaseous processing medium within the preset time period and the real-time detected tobacco leaf flow rate and moisture content.

[0066] The working principle of the data processing unit in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

[0067] The above embodiments are preferred embodiments of the present application. Ordinary technicians in this field can also make various changes or improvements on this basis. Without departing from the overall concept of the present application, these changes or improvements should fall within the scope of protection required by the present application.

Claims

1. A method for detecting the processing strength of tobacco material in a drum rehumidification process, characterized in that: include: Continuously and in real time detect the flow rate, temperature and humidity of the inlet hot air at the feeding end of the loosening and rehumidification drum, and calculate the thermal enthalpy value of the inlet hot air within a preset time period; The flow rate and temperature of saturated steam are continuously and in real time detected at the inlet of the steam injection pipeline of the loose rehumidification drum, and the enthalpy value of the saturated steam injected into the drum within a preset time period is calculated; Continuously and in real time detect the flow rate, temperature and humidity of the exhaust gas on the exhaust pipe at the discharge end of the loose rehumidification drum, and calculate the thermal enthalpy value of the exhaust gas within a preset time period; Determine the net enthalpy value of the gaseous processing medium input into the drum within the preset time period based on the enthalpy value of the hot air at the drum inlet, the enthalpy value of the saturated steam, and the enthalpy value of the exhaust moisture within the preset time period; The calculation method for the net heat enthalpy value input into the drum by the gaseous processing medium during the preset time period is: H total =H gasin +H steam -H gasout Where H total is the calculated net enthalpy, H gasin ,H steam ,H gasout They are the enthalpy values ​​of hot air, saturated steam and exhaust moisture at the drum inlet within a preset time period; Continuously and in real time detect the tobacco flake flow rate and moisture content at the exit of the loosening and conditioning drum, and then calculate the processing intensity of the tobacco flake loosening and conditioning process by combining the calculated net enthalpy value of the gaseous processing medium input into the drum; The calculation method for the processing intensity of the loosening and rehydration process of tobacco strips is: Where q is the processing intensity of the loosening and rehydration process of tobacco sheets, W, X tobacco are the real-time detected flow rate and moisture content of the smoke sheets at the outlet of the loose rehumidification drum, H total The net enthalpy value of the drum is input for the gaseous processing medium, and t1 and t2 are the start and end times of the preset time period.

2. The processing strength detection method of the tobacco material drum rehumidification process according to claim 1 is characterized in that: The calculation method of the hot air enthalpy value at the inlet within the preset time period is: Where H gasin is the calculated hot air enthalpy value at the inlet during the preset time period, t1 and t2 are the start and end times of the preset time period, and V gasin ,T gasin ,X gasin They are the flow rate, temperature and humidity of the inlet hot air detected in real time at the feeding end of the loose rehumidification drum.

3. The processing strength detection method of the tobacco material drum rehumidification process according to claim 1 is characterized in that: The calculation method of the enthalpy value of the saturated steam injected into the drum within the preset time period is: Where H steam is the calculated enthalpy of the saturated steam injected into the drum within the preset time period, V steam ,T steam They are the flow rate and temperature of saturated steam detected in real time at the inlet of the steam injection pipeline of the loose rehumidification drum.

4. The processing strength detection method of the tobacco material drum rehumidification process according to claim 1 is characterized in that: The calculation method for the enthalpy value of moisture exhaust within the preset time period is: Where H gasout is the calculated enthalpy value of moisture removal within the preset time period, V gasout ,T gasout ,X gasout The flow rate, temperature and humidity of the exhaust gas are respectively detected in real time on the exhaust pipe at the discharge end of the loose rehumidification drum.

5. The processing strength detection method of tobacco material drum rehumidification process according to claim 1 is characterized in that: The preset time period is determined according to the material unit batch processing time, or according to any period of time that is not less than the material roller passing time during the steady-state production process.

6. A tobacco material drum rehumidification process processing strength detection system, characterized in that: including a data acquisition unit and a data processing unit; The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector provided on the inlet hot air pipeline at the feeding end of the loosening and rehumidification drum, which are used to detect the flow rate, temperature and humidity of the inlet hot air in real time: The data acquisition unit includes a gas mass flow detector and a gas phase temperature detector arranged at the inlet of the steam injection pipeline of the loose rehumidification drum, which are used to detect the flow and temperature of saturated steam in real time; The data acquisition unit includes a gas mass flow detector and a gas phase temperature and humidity detector provided on the dehumidification gas pipeline at the discharge end of the loose rehumidification drum, which are used to detect the flow rate, temperature and humidity of the dehumidification gas in real time; The data acquisition unit includes an electronic belt scale and an online moisture detector, which are arranged at the entrance or exit of the loosening and rehumidification drum. The electronic belt scale is used to detect the flow rate of the tobacco leaves in real time, and the online moisture detector is used to detect the moisture content of the tobacco leaves in real time. The data processing unit acquires real-time detected data from the data acquisition unit, calculates the enthalpy value of the hot air at the inlet, the enthalpy value of the saturated steam injected into the drum, and the enthalpy value of the exhaust moisture within a preset time period; determines the net enthalpy value of the gaseous processing medium input into the drum within the preset time period based on the calculated enthalpy values; and calculates the processing intensity of the tobacco sheet loosening and rehumidification process based on the net enthalpy value of the gaseous processing medium input into the drum within the preset time period and the real-time detected tobacco sheet flow rate and moisture content; The calculation method for the net heat enthalpy value input into the drum by the gaseous processing medium during the preset time period is: H total =H gasin +H steam -H gasout Where H total is the calculated net enthalpy, H gasin ,H steam ,H gasout They are the enthalpy values ​​of hot air, saturated steam and exhaust moisture at the drum inlet within a preset time period; The calculation method for the processing intensity of the loosening and rehydration process of tobacco strips is: Where q is the processing intensity of the loosening and rehydration process of tobacco sheets, W, X tobacco are the real-time detected flow rate and moisture content of the smoke sheets at the outlet of the loose rehumidification drum, H total The net enthalpy value of the drum is input for the gaseous processing medium, and t1 and t2 are the start and end times of the preset time period.

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