CN115581309A - A comprehensive monitoring gas-conditioned station for tobacco gas-conditioned maintenance - Google Patents
A comprehensive monitoring gas-conditioned station for tobacco gas-conditioned maintenance Download PDFInfo
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/12—Steaming, curing, or flavouring tobacco
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Abstract
The invention relates to a comprehensive monitoring controlled atmosphere station for controlled atmosphere maintenance of tobacco. The gas conditioning station comprises a processor; the gas adjusting module is electrically connected with the processor; a detection module electrically connected to the processor, configured to connect to one or more exhaust channels, and detect oxygen content and/or humidity from gas in one or more of the flexible gas tight tent; a communication module configured to receive control instructions from a remote service platform or a field operations platform and send the control instructions to the processor, and send oxygen content and/or humidity from the detection module to a server; and an input-output module configured to display the oxygen content and/or humidity from the detection module and capable of receiving instructions from a user and sending the user's instructions to the processor. The invention can be used for a tobacco controlled atmosphere curing system to realize tobacco curing.
Description
Technical Field
The invention relates to the technical field of tobacco curing, in particular to a comprehensive monitoring controlled atmosphere station for controlled atmosphere curing of tobacco.
Background
Tobacco can be used for production after being naturally alcoholized after being stored in a storehouse for more than 3 years. For large volumes of tobacco palletises, the weight of tobacco in each palletise is typically in the range of a few tonnes to a few tens of tonnes. In the process of storing the tobacco stack position, the problems of insect generation, mildew and the like often occur. At present, a dehumidifier, an air conditioner and the like are arranged in a storage warehouse to inhibit insect pests and mildew of tobacco leaves, but the insect pests and the mildew still occur sometimes, and serious economic loss is caused.
The controlled atmosphere curing technology is gradually applied to tobacco storage as a green and environment-friendly storage technology. At present, the controlled atmosphere curing technology is applied to curing and alcoholizing tobacco. However, the current tobacco modified atmosphere curing technology system still needs to manually perform a large number of operations, such as opening and closing of a pipeline valve, measurement of modified atmosphere parameters in an airtight enclosure, uploading of measured data and the like. Not only is the operation of the controlled atmosphere maintenance system inconvenient, but also the monitoring of the controlled atmosphere parameters in the tobacco stack position is difficult to realize. Therefore, a more convenient and intelligent controlled atmosphere curing system is urgently needed in the field.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a comprehensive monitoring controlled atmosphere station for controlled atmosphere maintenance of tobacco, which comprises the following steps: a processor;
a modified atmosphere module electrically connected to the processor and configured to receive instructions from the processor and control a plurality of solenoid valves on a distribution pipe network connected thereto to form one or more inlet air channels from a gas source to one or more flexible airtight tents storing tobacco stacks and one or more outlet air channels from the one or more flexible airtight tents to an outlet of the distribution pipe network to regulate and/or maintain oxygen content and/or humidity in the one or more flexible airtight tents;
a detection module electrically connected to the processor, configured to connect to one or more exhaust channels, and detect oxygen content and/or humidity from gas in one or more of the flexible gas tight tent;
a communication module configured to receive control instructions from a remote service platform or a field operations platform and send the control instructions to the processor, and send oxygen content and/or humidity from the detection module to a server; and
an input-output module configured to display oxygen content and/or humidity from the detection module and capable of receiving instructions from a user and sending the instructions of the user to the processor.
Optionally, the integrated monitoring controlled atmosphere station comprises a first housing and a second housing, the processor, the controlled atmosphere module, the detection module and the communication module being disposed in the first housing; the input and output module is arranged in the second shell; the first housing and the second housing include a wired or wireless connection therebetween.
Optionally, the first housing is located on the distribution network; the second housing is positioned adjacent to the one or more flexible, airtight tents.
Optionally, the detection module is connected to the one or more exhaust passages via one or more branches.
Optionally, the detection module includes an air extraction opening, an internal air path, a fan, an oxygen sensor, and a humidity sensor; the air suction port and the fan are connected to two ends of the internal air path respectively, the internal air path is branched and is connected with the oxygen sensor and the humidity sensor respectively, and meanwhile, the content and humidity of the oxygen in the flexible airtight tent are independently detected.
Optionally, the detection module is configured to receive a temperature from one or more temperature sensors in one or more flexible airtight tents; the communication module is configured to send the temperature to a server.
Optionally, the processor is configured to receive instructions from a remote service platform, a field operations platform, or the input-output module and control the opening and/or closing of one or more intake and/or exhaust passages to one or more airtight tents by the modified atmosphere module.
Optionally, the modified atmosphere module is configured to form a plurality of inlet passages for a plurality of flexible airtight tents and to time-share an exhaust passage between one of the plurality of flexible tents to the detection module.
Optionally, the modified atmosphere module is configured to form a gas passage to the detection module for one or more gas inlet passages of the one or more flexible gas tight tents.
Optionally, the atmosphere control module is configured for use with 20-40 airtight spaces.
According to the comprehensive monitoring controlled atmosphere station for controlled atmosphere maintenance of the tobacco, controlled atmosphere maintenance can be performed on tobacco stack positions by matching with an air source and a distributed pipe network, and a constant-humidity, stable and low-oxygen maintenance and alcoholization environment is established for each tobacco stack position by adopting equipment such as the distributed pipe network and the comprehensive monitoring controlled atmosphere station; the environment parameters in the plurality of flexible airtight tents are adjusted and monitored by adopting the comprehensive monitoring air conditioning station, so that protective measures such as insect killing, insect prevention, mildew prevention, bacteriostasis and the like of the tobacco leaves are realized. Moreover, the comprehensive monitoring controlled atmosphere station for controlled atmosphere maintenance of the tobacco is convenient to operate and high in intelligent degree, can reduce loss caused by the tobacco in the storage and alcoholization processes, and is a high-market-worth technical scheme.
Drawings
Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the construction of a tobacco curing system according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of an integrated monitoring system for a tobacco curing system according to one embodiment of the present invention;
FIG. 3 is a schematic view of a tobacco modified atmosphere curing system according to an embodiment of the present invention; and
FIG. 4 is a flow chart of a method for modified atmosphere curing of tobacco according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.
FIG. 1 is a schematic diagram of a tobacco curing system according to one embodiment of the present invention. As shown in the figure, the tobacco curing system of the present embodiment is applied to a tobacco curing warehouse 101. The tobacco care system of this embodiment includes: a plurality of flexible airtight tents 102, a distributed pipe network 104, a comprehensive detection gas-conditioning station 106 and a gas source 103. A plurality of flexible, air tight tents 102 are used to place the stacked tobacco stack. Gas source 103 is used to provide high purity nitrogen. Distribution network 104 is connected to gas source 103. The integrated sensing gas-conditioned station 106 is configured to sense gas-conditioned parameters of the plurality of flexible gas-tight tents 102 and to enable gas-conditioned parameters of the flexible gas-tight tents 102 to be adjusted via the distribution network 104. In some embodiments, the modified atmosphere parameters include oxygen content, humidity, or other parameters.
The flexible, airtight tent 102 includes one or more flexible, airtight layers. Optionally, the flexible airtight tent 102 may include an airtight door. The airtight door is arranged on the flexible airtight layer of the flexible airtight tent. The air exchange rate of the flexible airtight tent is less than 0.05d -1 Preferably, the ventilation rate is less than 0.01d -1 (the volume of gas exchanged in one day inside the airtight enclosure in carbon dioxide or oxygen labeling method is a percentage of the total volume). The flexible airtight layer includes, but is not limited to, airtight film materials such as PVC film, airtight cloth, etc. The flexible air barrier may be opaque or translucent. In some embodiments, a transparent PVC film may be used to facilitate viewing of the interior of the tent. In the case of a non-transparent flexible airtight layer, an airtight observation window can be added or a transparent airtight door can be adopted. In some embodiments, the airtight door is a sliding doorThe chain door, the magnetic door, the adhesive door and the like, such as a soft door with a zipper, play a role in locking after being tensioned. In some embodiments, the flexible airtight layer on the upper part of the flexible airtight tent is provided with an air outlet, and the bottom of the side surface thereof is provided with an air inlet. As will be appreciated by those skilled in the art, the air intake and exhaust vents of the flexible, airtight tent 102 may comprise a variety of other arrangements.
In some embodiments, the flexible airtight tent may be fabricated on-site. First, a film cover is produced according to the size of the stack. For example, the film cover is previously made using a high barrier film. In a curing store, a flexible substrate (e.g., a carton) is first laid in the tobacco stack, and a prefabricated film cover is laid over the flexible substrate. Then, the tobacco is placed and palletized to form a tobacco palletizing position. The number of tobacco pile positions can be set according to the requirement, and is generally 100-200 boxes, which is about 20-40 tons; for an overhead cargo space, the tobacco can be stacked into thousands of boxes, even tens of thousands of boxes; it is better to use a highly airtight storehouse at this time. After the tobacco stack position is piled, the flexible airtight tent is manufactured on site by utilizing sealing equipment such as cutting, hot pressing, end sealing and the like. In some embodiments, the mask surface has pre-positioned exhaust and intake ports. In some embodiments, an air outlet may be installed on site in the flexible airtight layer of the upper portion of the flexible airtight tent and an air inlet may be installed on the bottom of the side thereof. Further, the exhaust and intake ports may be connected to exhaust and intake lines of the distribution network near the stack location.
In some embodiments, a temperature sensor may be disposed within the flexible, airtight tent that transmits the temperature within the flexible, airtight tent to the integrated monitoring controlled atmosphere station, either wired or wirelessly, and then to a field operations platform and/or a remote service platform via the integrated monitoring controlled atmosphere station.
In some embodiments, a moisture sensor may be disposed within the flexible, airtight tent that includes a probe that can be inserted into the interior of the tobacco pile to detect moisture within the interior of the tobacco pile. The tobacco humidity sensor sends the measured tobacco humidity to the integrated monitoring gas station in a wired or wireless mode, and then the measured tobacco humidity is sent to a field operation platform and/or a remote service platform through the integrated monitoring gas station.
A distribution pipe network 104 is arranged in the maintenance warehouse 101. In one embodiment, the distribution network is positioned above the curing store 101 at a height above the height of the tobacco pile. Neither influence the stack position of tobacco nor influence the vehicle to pass in and out the curing storehouse. In another embodiment, the distribution network is installed in the maintenance depot 101 pre-buried under the ground of the maintenance depot. The distribution network 104 includes reserved air intake and exhaust lines near each of the predetermined tobacco pile positions within the curing store 101.
In one embodiment, the distribution network 104 disposed above the curing store 101 includes rigid air supply lines 1041 that extend above each of the predetermined tobacco pile positions within the curing store 101. One end of rigid gas supply line 1041 is connected to gas source 103. Rigid air supply lines 1041 each include an air supply branch near each predetermined tobacco pile location. The tail end of the gas supply branch comprises a gas supply end. The air supply end and the air inlet of the flexible airtight tent can be connected through a flexible pipeline. In some embodiments, a manual valve is provided on each gas supply branch of the rigid gas supply line 1041 for manually controlling the flow of gas into the plurality of flexible gas tight tents. Because the size of the tobacco stack locations may be different, the required gas flow rates are also different; while the gas supply branches are identical. The manual valve enables the user to adjust the flow of gas into the flexible airtight tent according to the size of the stack. The method is favorable for accurately controlling the air-conditioning parameters in the flexible airtight tent and can effectively save energy. In some embodiments, the distribution network includes a plurality of parallel rigid gas supply lines 1041 for respectively supplying nitrogen of different purities or humidities (e.g., 90%, 99%, and 99.99% nitrogen at the same time). A plurality of parallel rigid air supply lines may be respectively connected to the air supply branches through solenoid valves, thereby supplying nitrogen of different purities to the flexible airtight tent. The provision of nitrogen of different purity facilitates the rapid reduction of oxygen in the flexible airtight tent using a step oxygen reduction. In some embodiments, the distribution network comprises a plurality of humidification devices. The humidification device is connected to the rigid gas supply line via the gas inlet and outlet conduits and humidifies gas flowing therethrough (e.g., via a water tank). When the humidified gas is needed, the electromagnetic valves on the gas inlet pipeline and the gas outlet pipeline are opened, so that part of the gas in the rigid gas supply pipeline flows through the humidifying device, and the gas with certain humidity is obtained. Providing air at different humidities facilitates independent control of humidity within the airtight tent, while multiple parallel rigid air supply lines greatly improve the flexibility of air control for different flexible airtight tents.
In some embodiments, the distribution pipe network 104 includes rigid exhaust pipes 1042. Rigid air supply conduit 1041 is disposed substantially parallel to rigid air outlet conduit 1042. The rigid exhaust conduit 1042 also extends above each predetermined tobacco pile position in the curing store 101. The end of the rigid exhaust pipe 1042 is connected to the outside. The rigid vent conduit 1042 includes a vent branch near each predetermined tobacco stack location. One end of the outlet branch is connected to the integrated monitoring gas-conditioning station 106, which in turn is connected to a rigid exhaust pipe 1042. The other end of the air outlet branch comprises an air outlet end. The air outlet end and the air outlet of the flexible airtight tent can be connected through a flexible pipeline. Of course, the outlet branch can also be directly connected to the rigid outlet conduit 1042 and then connected to the integrated monitoring controlled atmosphere station 106 via a detection conduit. In some embodiments, the detection conduit may be a small bore conduit.
In some embodiments, a rigid exhaust conduit 1042 is not necessary. A flexible pipe and gas outlet branch is necessary from the gas outlet end of the flexible gas tight tent 102 to the integrated monitoring controlled atmosphere station 106.
And a certain margin is reserved between the air inlet end of the air supply branch and the air inlet of the flexible airtight tent and between the air outlet end of the air outlet branch and the air outlet of the flexible airtight tent. Therefore, even if the positions of the air outlet and the air inlet of the flexible airtight tent are slightly different from different stack positions, the airtight connection of the flexible airtight tent and the air supply branch and the air outlet branch can be ensured.
In some embodiments, a solenoid valve is provided at the connection of rigid gas supply line 1041 to gas source 103. The solenoid valve can be controlled through a field operation platform or a remote service platform. When the gas supply 103 begins to supply gas, the solenoid valve is opened to provide high purity (greater than 99.99%) nitrogen gas to one or more flexible, airtight tents through the rigid gas supply line.
In some embodiments, the gas supply branch includes a solenoid valve capable of controlling a gas passage of the corresponding flexible airtight tent. Likewise, the gas outlet branch comprises an electromagnetic valve which can control the gas passage between the corresponding flexible airtight tent and the corresponding comprehensive monitoring gas-adjusting station. As shown, the same integrated monitoring controlled atmosphere station 106 can correspond to multiple airtight tents (typically 6-20). The integrated monitoring controlled atmosphere station 106 controls the electromagnetic valves on the air supply branch and the air outlet branch of the corresponding flexible airtight tents, so as to control the air supply and controlled atmosphere parameter monitoring of the corresponding flexible airtight tents. The introduction of the comprehensive monitoring controlled atmosphere station 106 can greatly reduce the construction cost of the tobacco controlled atmosphere curing system and also provide a foundation for the low-cost accurate control of the tobacco controlled atmosphere curing.
In some embodiments, the air outlet and air outlet of the flexible airtight tent are connected to the flexible duct by quick connect plugs. In some embodiments, gas source 103 includes one or more nitrogen-producing devices configured to provide nitrogen gas of one or more purities and to provide pressure to provide the nitrogen gas to the distributed piping. In some embodiments, multiple nitrogen-producing devices of gas source 103 may be distributed at different locations in the warehouse and may be controlled to be independently activated or deactivated.
In some embodiments, gas source 103 comprises a mobile gas source, such as an on-board nitrogen plant or nitrogen-generating cart. The mobile gas source can be moved to a desired location in the warehouse and connected to a distribution pipe network to provide the desired high purity nitrogen. The mobile air source is very beneficial to reducing the investment cost of the tobacco curing system.
FIG. 2 is a schematic diagram of an integrated monitoring system for a tobacco curing system according to one embodiment of the present invention. As shown, integrated monitoring gas conditioning station 106 includes a processor 201, a gas conditioning module 202, a detection module 203, a communication module 204, and an input-output module 205. The modified atmosphere module 202 is electrically connected to the processor 201 and is configured to receive instructions from the processor 201 and control a plurality of solenoid valves on the supply and exhaust branches of corresponding flexible airtight tents on the distributed network to which it is connected to form one or more inlet air channels from the air source 103 to the one or more flexible airtight tents 102 storing tobacco stackers and one or more outlet air channels from the one or more flexible airtight tents 102 to the integrated monitoring modified atmosphere station 106 to regulate and/or maintain the oxygen content and/or humidity in the one or more flexible airtight tents 102.
The detection module 203 is electrically connected to the processor 201, is configured to communicate with one or more exhaust channels, receive gas from one or more of the flexible gas tight tents 102, and detect a modified atmosphere parameter such as oxygen content and/or humidity of the gas.
The communication module 204 sends the modified atmosphere parameters such as oxygen content and/or humidity from the detection module 203 to a remote service platform or a field operation platform. On the other hand, the communication module 204 receives a control instruction from a remote service platform or a field operation platform and transmits the control instruction to the processor 201. The processor 201 controls the modified atmosphere module 202 to adjust modified atmosphere parameters within the designated flexible airtight tent.
The input/output module 205 includes a display for displaying the modified atmosphere parameters such as oxygen content and/or humidity from the detection module 203, which facilitates the user to directly know the modified atmosphere parameters in one or more flexible airtight tents managed by the integrated monitoring modified atmosphere station 106. On the other hand, the input/output module 205 includes an input device (e.g., a keyboard or a touch screen) for receiving an instruction from a user and transmitting the instruction to the processor 201.
In some embodiments, the integrated monitoring controlled atmosphere station 106 is generally disposed on a distributed network. Not only convenient a plurality of solenoid valves on the air feed branch road and the branch road of giving vent to anger of controlling nearby, also can avoid the damage that tobacco buttress position operation and other ground operations may bring. For example, the integrated monitoring controlled atmosphere station 106 is disposed above a maintenance warehouse.
However, the remote location of the integrated monitoring controlled atmosphere station 106 from the ground can present a problem. It is inconvenient for the user to view and use the input-output module 205. In some embodiments, the integrated monitoring controlled atmosphere station 106 comprises a first housing in which the processor 201, the controlled atmosphere module 202, the detection module 203, and the communication module 204 are disposed; the input-output module 205 is disposed in the second housing; the first housing and the second housing are connected by a wire. In this way, the first housing may be located on the distribution network, for example above a maintenance depot; the second housing may be located at a convenient place of use, such as a wall or a pole near the ground. Similarly, the embodiment further comprises: the detection module 203 is disposed in a first housing and the processor 201, modified atmosphere module 202, communication module 204, and input output module 205 are disposed in a second housing. It will be appreciated by those skilled in the art that other means of separation may also be present. These ways are also within the scope of the present invention.
In some embodiments, the processor 201 is configured to receive instructions from a remote service platform, a field operations platform, or the input output module 205 and control the opening and/or closing of one or more intake and/or exhaust passages to one or more flexible airtight tents through the modified atmosphere module 102.
The modified atmosphere module 202 controls the solenoid valves on the air supply branches of the corresponding plurality of flexible airtight tents to form air inlet channels for one or more flexible airtight tents. In some embodiments, if the modified atmosphere module 202 is modified for multiple flexible airtight tents simultaneously, the modified atmosphere module 202 may time-share the exhaust passage between one of the multiple flexible airtight tents to the detection module 203. That is, the detection module 203 will detect the controlled atmosphere parameter in one of the flexible airtight tents first, and then detect the controlled atmosphere parameter in another one of the flexible airtight tents in turn until all the flexible airtight tents are traversed, and then return to the first flexible airtight tent. Therefore, even if the controlled atmosphere parameters in the flexible airtight tents are different, the same comprehensive monitoring controlled atmosphere station can realize independent controlled atmosphere control. In other embodiments, if the modified atmosphere parameters of the plurality of flexible airtight tents are the same or close, the modified atmosphere module 202 may form an exhaust path between all of the plurality of flexible airtight tents to the detection module 203 until the modified atmosphere parameters meet the criteria to complete the modified atmosphere operation. That is, the detection module 203 will detect the gas-conditioned parameters of the mixed gas in all the flexible airtight tents at the same time. Therefore, the simultaneous adjustment of the air-conditioning parameters in the plurality of flexible airtight tents can be more efficiently realized.
In some embodiments, referring to fig. 2, the detection module 203 is connected to the exhaust passage. The detection module 203 comprises an air suction port, an internal pipeline 2011, a fan 2012, an oxygen sensor 2013 and a humidity sensor 2014. The extraction opening links to each other with the air inlet of inside gas circuit 2011, the gas outlet of inside gas circuit 2011 is equipped with the branch and is connected to oxygen sensor 2013 and humidity transducer 2014 respectively, independently detects the content and the humidity of the oxygen that come from the interior gas of flexible airtight tent simultaneously. The gas passes through the oxygen sensor 2013 and the humidity sensor 2014 and then is connected to the outside through the blower 2012 in the internal gas path 2011. In the detection module 203, the oxygen content and the humidity are independently detected without interference, so that a more accurate detection result can be obtained.
In some embodiments, to avoid the influence of the gas existing in the flexible channel and the gas outlet pipeline on the accuracy of the detection result, the time for the gas from the flexible airtight tent to enter the detection module needs to be known through calculation. The volume of the gas extracted by the detection module through the extraction opening in each second is known according to the revolution and the air quantity of the fan 2012, and then the total volume of the gas in the flexible channel and the outlet branch is calculated according to the length of the flexible channel and the length of the outlet branch. Therefore, the time for the gas in the flexible airtight tent to enter the detection module can be calculated. Further, the length of the flexible channel and the length of the air outlet branch of different flexible airtight tents are different, and the total volume of air in the flexible channel and the air outlet branch are also different, so that the time for air to enter is also different. In addition, the time of gas entry is also different in different modes, such as modified atmosphere parameter adjustment for single and multiple flexible airtight tents. The detection module can pre-store the time for gas to enter the detection module under different flexible airtight tents and different modes, so that a more accurate detection result is provided.
In some embodiments, the detection module 203 also receives temperature parameters from temperature sensors in a corresponding plurality of flexible airtight tents. The communication module 204 also sends the temperature parameter to a field operating platform or a remote service platform.
In some embodiments, the detection module 203 further comprises a gas sensor data processing unit. The gas sensor data processing unit stores a database of standard samples of different alcoholization degrees. Specifically, certain tobaccos with different alcoholization processes are used as standard samples, and volatile gases generated by the standard samples are introduced into the gas sensor data processing unit. Certain tobacco leaves with alcoholization degrees of good, medium and poor alcoholization quality can be selected as standard samples; then, recording signals acquired by the gas sensor and establishing a corresponding relation between the signals and alcoholization quality in some embodiments, the gas sensor data processing unit comprises a gas filtering module with sequentially reduced pore size, and can separate gas molecules with different sizes based on molecular sieve effect gradient, so as to realize multi-component gas detection in complex atmosphere.
FIG. 3 is a schematic view of a tobacco modified atmosphere curing system according to one embodiment of the invention. As shown, the multiple integrated monitoring gas stations are the collection points for data in the system. The integrated monitoring controlled atmosphere station collects respective controlled atmosphere data from the plurality of flexible airtight tents which are managed, and respectively sends the controlled atmosphere data to the field operation platform and/or the remote service platform.
In some embodiments, the field operations platform includes a processor, memory, communication device, input-output device, and display for monitoring and adjusting modified atmosphere parameters within each flexible airtight tent on-site at the maintenance depot. As will be appreciated, when there are multiple maintenance stores, the field operating platform corresponds to a comprehensive monitoring controlled atmosphere station in the multiple maintenance stores. The field operation platform obtains and summarizes the air-conditioning parameter states in all the flexible airtight tents from all the comprehensive monitoring air-conditioning stations by utilizing the communication device, and can show the states to field operators through the display. The field worker can also utilize the field operation platform to input instructions to adjust the controlled atmosphere parameters in one or more flexible airtight tents. And the field operation platform forwards the input instruction to the appointed comprehensive monitoring gas-conditioning station. The integrated monitoring air-conditioning station controls the opening of the electromagnetic valves on the air supply branch and the exhaust branch; the field operations platform controls the opening of the solenoid valves on the distributed piping network and the gas source to form a gas supply passage from the gas source to the designated one or more flexible gas tight tents and a gas exhaust passage from the designated one or more flexible gas tight tents to the corresponding integrated monitoring controlled atmosphere station. The air is supplied to the flexible airtight tent through the air supply channel, and the air-conditioning parameters in the flexible airtight tent are monitored through the comprehensive monitoring air-conditioning station, so that the adjustment of the air-conditioning parameters is realized.
In some embodiments, the remote service platform includes a communication device and one or more servers for monitoring and adjusting modified atmosphere parameters within each flexible airtight tent on-site at the maintenance depot. The remote service platform utilizes the communication device to communicate with each comprehensive monitoring controlled atmosphere station to obtain and summarize the controlled atmosphere parameter states in all the flexible airtight tents. In some embodiments, the manager can log in the remote service platform, view the gas-conditioning parameters in each flexible airtight tent through the display interface and input instructions for remote control. In some embodiments, the remote service platform includes a client through which an administrator can view the modified atmosphere parameters within each flexible airtight tent. The manager can also utilize the client to input instructions and then adjust the controlled atmosphere parameters in one or more flexible airtight tents through the remote service platform. And the remote service platform forwards the input instruction to a designated comprehensive monitoring gas-conditioning station. And the comprehensive monitoring air-conditioning station controls the opening of the electromagnetic valves on the air supply branch and the exhaust branch. The remote service platform or a client thereof can also communicate with the field operation platform to control the opening of the solenoid valves on the distributed pipe network and the gas source, thereby forming a gas supply passage from the gas source to the designated one or more flexible airtight tents and a gas exhaust passage from the designated one or more flexible airtight tents to the corresponding integrated monitoring controlled atmosphere station. The air is supplied to the flexible airtight tent through the air supply channel, and the air-conditioning parameters in the flexible airtight tent are monitored through the comprehensive monitoring air-conditioning station, so that the adjustment of the air-conditioning parameters is realized.
In other embodiments, the client of the remote service platform may be utilized as software for field operations, while the field operations platform is of a simplified design. The field operation platform and each comprehensive monitoring gas-conditioning station are not communicated with each other, but obtain instructions from a remote service platform so as to control the gas source and the electromagnetic valve on the distributed pipeline network. For example, a manager logs in a client of the remote service platform at a maintenance warehouse and checks the controlled atmosphere parameters of a plurality of flexible airtight tents. And sending an instruction for adjusting the controlled atmosphere parameters in the plurality of flexible airtight tents at the client according to the requirement. And after receiving the instruction, the remote service platform respectively sends the instruction to the field operation platform and the appointed comprehensive monitoring controlled atmosphere station. And after the field operation platform receives the instruction, the air source is controlled to start working, and the electromagnetic valves on the distributed pipe network and the air source are opened. And the appointed comprehensive monitoring gas-adjusting station controls the opening of the electromagnetic valves on the gas supply branch and the gas exhaust branch of the appointed flexible airtight tent to start gas adjustment on the appointed flexible airtight tent, and simultaneously, the detection module of the comprehensive monitoring gas-adjusting station starts to detect gas-adjusting parameters from the appointed flexible airtight tent. And the comprehensive monitoring controlled atmosphere station sends the detected controlled atmosphere parameters to a remote service platform. And the remote service platform sends the detected modified atmosphere parameters to the client on site. The manager can check the change of the controlled atmosphere parameters in the flexible airtight tent in real time until the specified controlled atmosphere parameters in the flexible airtight tent reach the expected parameter values. And the remote service platform sends an instruction to the field operation platform and the appointed comprehensive monitoring controlled atmosphere station to finish controlled atmosphere operation.
In some embodiments, the client of the remote monitoring platform of the tobacco controlled atmosphere curing system of the present invention can be installed on one or more of a desktop computer, a notebook computer, a smart phone and a tablet computer. The method can be used for receiving the gas-conditioning parameters such as the oxygen content, the humidity and/or the temperature of the gas in the flexible airtight tent reported by each comprehensive monitoring gas-conditioning station remotely or on site, and inquiring, analyzing and displaying the oxygen content, the humidity and/or the temperature of the gas in the flexible airtight tent; and the control of a preset program or a user instruction can be received, so that the adjustment of the controlled atmosphere parameters in the flexible airtight tent is realized.
In some embodiments, the integrated monitoring controlled atmosphere station may receive a controlled atmosphere parameter configuration from one or more flexible airtight tents of the field operations platform or the remote service platform. A detection module of the integrated monitoring gas-conditioning station periodically or aperiodically detects gas from the corresponding plurality of flexible airtight tents; the processor determines whether the detected modified atmosphere parameters conform to a modified atmosphere parameter configuration. If the range determined by the modified atmosphere parameter configuration is found to be exceeded, the comprehensive detection modified atmosphere station sends out an alarm to the field operation platform and/or the remote service platform. And the field operation platform or the remote service platform responds to initiate the gas-conditioning parameter adjusting operation.
In other embodiments, the integrated monitoring station may also become the initiator of the modified atmosphere parameter adjustment operation. A detection module of the integrated monitoring gas station periodically or aperiodically detects gas from one or more flexible gas tight tents; the processor determines whether the detected modified atmosphere parameters conform to a modified atmosphere parameter configuration. And if the controlled atmosphere parameter configuration is found to be beyond the determined range, the comprehensive detection controlled atmosphere station actively initiates controlled atmosphere parameter adjustment operation aiming at the flexible airtight tent. In some embodiments, the integrated monitoring controlled atmosphere station is in communication with the field operations platform. The field operation platform controls the electromagnetic valves on the air source and the distributed pipe network, and the comprehensive monitoring controlled atmosphere station controls the electromagnetic valves on the air supply branch and the exhaust branch of the flexible airtight tent to form an air inlet channel and an exhaust channel and implement controlled atmosphere parameter adjustment. In other embodiments, the integrated monitoring controlled atmosphere station directly controls the gas source and the solenoid valves on the distributed pipe network, and can also actively perform controlled atmosphere parameter adjustment operations. The method has the advantages that components participating in decision making can be reduced as much as possible, and the controlled atmosphere parameters in the flexible airtight tent are ensured to be always within the range of controlled atmosphere parameter configuration.
FIG. 4 is a flow chart of a method for modified atmosphere curing of tobacco according to an embodiment of the present invention. As shown in the figure, the tobacco modified atmosphere curing method comprises the following steps: in step S410, the tobacco pile is stacked, a flexible airtight tent is fabricated on site to seal the tobacco pile, and the flexible airtight tent is connected to a distributed pipe network. According to the embodiment, the sealing mode of the flexible airtight tent manufactured on site has small influence on the tobacco stacking position operation, and the distributed pipe network is arranged at the position which does not influence the stacking position operation, so that the tobacco warehousing efficiency is not influenced. Because the distributed pipe network and the comprehensive monitoring gas-conditioning station are preset, a plurality of flexible airtight tents can be supported at the same time. This makes the whole tobacco modified atmosphere curing method of the present embodiment very efficient.
In step S420, an oxygen-reduction insecticidal/fungicidal treatment is performed on the tobacco pile position in the flexible airtight tent. Responding to an insect killing/mildew removing instruction of a field operation platform or a remote service platform, and forming a plurality of gas channels from a gas source to a plurality of flexible airtight tents through a distributed pipe network; and carrying out oxygen reduction on the plurality of flexible airtight tents. In some embodiments, the oxygen content within the flexible, airtight tent is reduced to 1%,0.5%, or 0.2% for insecticidal and mold removal purposes. In some embodiments, mold removal agents, such as chlorine dioxide, may also be released into the tobacco pile during this step to better effect mold removal.
In step S430, the modified atmosphere parameters within the flexible airtight tent are maintained for a time sufficient to achieve insecticidal/mold removal. After the flexible airtight tent is sealed, the tobacco stack position is isolated from the outside; all set up the filter on air feed branch road and the branch road of giving vent to anger, can filter worm's ovum and mould spore. Therefore, the worm eggs and mold existing outside will not enter the flexible airtight tent again. The effects of killing insects, preventing mildew and inhibiting bacteria can be achieved only by carrying out oxygen reduction replacement on the airtight tent every year and controlling the oxygen content at a lower level for a period of time. Therefore, the workload can be greatly reduced, and the quality of the tobacco can be improved.
In some embodiments, the killing/mold removal operation of step S430 uses a lower oxygen content than the prior art to achieve better killing/mold removal. In some embodiments, the oxygen content of the insecticidal/mildewcidal composition is less than 1% and the insecticidal/mildewcidal time is between 5 days and 15 days (e.g., 15 days for 1% oxygen). Preferably, in some embodiments, the oxygen content of the insecticidal/fungicidal composition is 0.5%, and the insecticidal/fungicidal period is 10 days. More preferably, in some embodiments, the oxygen content of the insecticidal/fungicidal composition is 0.2%, and the insecticidal/fungicidal period is 5 days.
In some embodiments, a mold remover, such as chlorine dioxide, may be applied to the plurality of flexible tents during the insecticidal/mold removing process of step S430 to assist in promoting mold removal. Throughout step S430, the integrated monitoring controlled atmosphere station periodically detects the oxygen content within the plurality of flexible airtight tents. If the oxygen content in the flexible airtight tent is higher than the set insecticidal/mildewproof maximum oxygen content, starting the air conditioning operation of the flexible airtight tent until the oxygen content in the flexible airtight tent reaches the set insecticidal/mildewproof oxygen content.
In some embodiments, after the insecticidal/mold removal operation, the modified atmosphere operation for each flexible airtight tent is started, the oxygen content is increased, and the humidity is controlled to reach the set alcoholization modified atmosphere parameters, so as to accelerate the alcoholization of the tobacco.
Because the tobacco alcoholization time is relatively long, in some embodiments, the comprehensive monitoring controlled atmosphere station is used as a core device, and the comprehensive monitoring controlled atmosphere station is used for periodically detecting the oxygen content and the humidity in the corresponding flexible airtight tent. In response to the oxygen content and/or humidity within the one or more flexible, airtight tents exceeding a predetermined range; the integrated monitoring controlled atmosphere station sends a prompt to the field operation platform or the remote service platform to start the controlled atmosphere operation for the flexible airtight tent or tents. Specifically, the field operations platform cooperates with the integrated monitoring controlled atmosphere station to activate the gas source and open the distributed piping and solenoid valves on the gas supply and outlet branches to form a plurality of gas passages from the gas source through the distributed piping network to the flexible gas tight tent or tents. Introducing gas-conditioned high-purity nitrogen into the plurality of flexible gas-tight tents and discharging gas in the plurality of flexible gas-tight tents through the distribution pipe network, wherein part of the gas discharged from the plurality of flexible gas-tight tents passes through the detection module of the comprehensive monitoring gas-conditioning station. Maintaining or adjusting the modified atmosphere parameters within the flexible airtight tent throughout the entire mellowing cycle. Responding to a user instruction to adjust modified atmosphere parameters or oxygen content and/or humidity within the plurality of flexible airtight tents exceeding a predetermined range; the comprehensive monitoring controlled atmosphere station forms a plurality of gas channels from a gas source to a plurality of flexible airtight tents through a distribution pipe network, a plurality of gas channels from one of the flexible airtight tents to the detection module and a plurality of gas channels from the flexible airtight tents to the detection module in a time-sharing mode by controlling the controlled atmosphere module to open corresponding solenoid valves; introducing high-purity nitrogen subjected to modified atmosphere into the plurality of flexible airtight tents and discharging gas in the plurality of flexible airtight tents through the distribution pipe network, wherein the oxygen content and the humidity of the gas discharged from the plurality of flexible airtight tents are detected by the detection module of the comprehensive monitoring modified atmosphere station through the gas discharged from the plurality of flexible airtight tents. When the detection module detects that the controlled atmosphere parameters in the flexible airtight tent accord with the instructions of the user or reach a preset range, the comprehensive monitoring controlled atmosphere station closes the corresponding electromagnetic valve by controlling the controlled atmosphere module.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.
Claims (10)
1. A comprehensive monitoring controlled atmosphere station for a tobacco controlled atmosphere curing system, comprising:
a processor;
a modified atmosphere module electrically connected to the processor and configured to receive instructions from the processor and control a plurality of solenoid valves on a distribution pipe network connected thereto to form one or more inlet air channels from a gas source to one or more flexible airtight tents storing tobacco stacks and one or more outlet air channels from the one or more flexible airtight tents to an outlet of the distribution pipe network to regulate and/or maintain oxygen content and/or humidity in the one or more flexible airtight tents;
a detection module electrically connected to the processor, configured to connect to one or more exhaust channels, and detect oxygen content and/or humidity from gas in one or more of the flexible gas tight tent;
a communication module configured to receive control instructions from a remote service platform or a field operations platform and send the control instructions to the processor, and send oxygen content and/or humidity from the detection module to a server; and
an input-output module configured to display oxygen content and/or humidity from the detection module and capable of receiving instructions from a user and sending the instructions of the user to the processor.
2. The integrated monitoring controlled atmosphere station of claim 1, comprising a first housing and a second housing, the processor, the controlled atmosphere module, the detection module, and the communication module being disposed in the first housing; the input and output module is arranged in the second shell; the first housing and the second housing include a wired or wireless connection therebetween.
3. The integrated monitoring controlled atmosphere station of claim 1, wherein the first housing is located on the distributed network; the second housing is positioned adjacent to the one or more flexible, airtight tents.
4. The integrated monitoring controlled atmosphere station of claim 1, wherein the detection module is connected to the one or more exhaust passages via one or more branches.
5. The integrated monitoring controlled atmosphere station of claim 1, wherein the detection module comprises an air extraction port, an internal air path, a blower, an oxygen sensor, a humidity sensor; the air suction port and the fan are connected to two ends of the internal air path respectively, the internal air path is branched and is connected with the oxygen sensor and the humidity sensor respectively, and meanwhile, the content and humidity of the oxygen in the flexible airtight tent are independently detected.
6. The integrated monitoring controlled atmosphere station of claim 1, wherein the detection module is configured to receive a temperature from one or more temperature sensors in one or more flexible airtight tents; the communication module is configured to send the temperature to a server.
7. The integrated monitoring controlled atmosphere station of claim 1, wherein the processor is configured to receive instructions from a remote service platform, a field operations platform, or the input-output module and control the opening and/or closing of one or more intake and/or exhaust passages to one or more airtight tents through the controlled atmosphere module.
8. The integrated monitoring controlled atmosphere station of claim 1, wherein the controlled atmosphere module is configured to form a plurality of inlet passages for a plurality of flexible airtight tents and to time-share an outlet passage between one of the plurality of flexible tents to the detection module.
9. The integrated monitoring controlled atmosphere station of claim 1, wherein the controlled atmosphere module is configured to form a gas passage to the detection module for one or more inlet gas passages of the one or more flexible airtight tents.
10. The integrated monitoring controlled atmosphere station of claim 1, wherein the controlled atmosphere module is configured for use with 20-40 airtight spaces.
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