US20130168457A1 - Method for storing tobacco - Google Patents

Method for storing tobacco Download PDF

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Publication number
US20130168457A1
US20130168457A1 US13/716,082 US201213716082A US2013168457A1 US 20130168457 A1 US20130168457 A1 US 20130168457A1 US 201213716082 A US201213716082 A US 201213716082A US 2013168457 A1 US2013168457 A1 US 2013168457A1
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United States
Prior art keywords
control joint
plastic
plastic sealing
tent
sealing tent
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Abandoned
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US13/716,082
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English (en)
Inventor
Yiwei Li
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Individual
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Individual
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Publication of US20130168457A1 publication Critical patent/US20130168457A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • 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
    • A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
    • 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

Definitions

  • the invention relates to a method for storing tobacco.
  • Tobacco leaves are easy to be attacked by pests and mold during storage, moreover, problems like daily ventilization, cooling, drying, dehumidification, and normal alcoholization of the tobacco leaves under natural conditions need to be properly solved.
  • a method for storing tobacco comprising:
  • constructing a sealed plastic tent system for a tobacco stack capable of mechanically controlling internal storage conditions in a tobacco warehouse comprising:
  • step (2) performing any one of following steps (1) and (2), step (1) first and then step (2), or step (2) first and then step (1):
  • phosphine fumigant is used to prevent pests in tobacco leaves according to the following steps:
  • the inlet control joint and the outlet control joint on one side of the plastic sealing tent are connected to an exhaust gas filtering and purifying device for fumigation via a main ventilating pipe, the centrifugal exhauster, and the inlet control joint and the outlet control joint on the other side of the plastic sealing tent are switched on whereby pumping out poisonous exhaust gas in the sealed space formed by the plastic sealing tent and the plastic film during fumigation, and blowing the gas into the exhaust gas filtering and purifying device for fumigation for further filtering and purification.
  • the number of the inlet control joints and the out control joints comprising the end covers is 1 to 30.
  • the plastic sealing tent is made from plastic film or Nylon composite film.
  • a volume concentration of the high-concentration nitrogen is greater than or equal to 85%.
  • the exhaust gas filtering and purifying device employs a poisonous gas filtering and purifying device in the prior art, or an absorption tower, an exhaust gas purification tower, a filtering device, a phosphine filtering and absorption device, a phosphine gas filtering device, a phosphine gas collector, a phosphine gas processing device, a phosphine gas purifying device, a sulfuryl fluoride filtering and absorption device in the prior art.
  • a poisonous gas filtering and purifying device in the prior art, or an absorption tower, an exhaust gas purification tower, a filtering device, a phosphine filtering and absorption device, a phosphine gas filtering device, a phosphine gas collector, a phosphine gas processing device, a phosphine gas purifying device, a sulfuryl fluoride filtering and absorption device in the prior art.
  • FIG. 1-1 is illustrates constructing a sealed plastic tent system capable of mechanically controlling internal storage conditions in a tobacco warehouse
  • FIG. 1-2 is a top view of FIG. 1-1 ;
  • FIG. 2 is an enlarged view of a portion A in FIG. 1-2 ;
  • FIG. 3 illustrates a ventilation circuit formed by multiple plastic sealing tents connected in series
  • FIG. 4 illustrates a single-direction-exhaust ventilation circuit formed by multiple plastic sealing tents
  • FIG. 5 illustrates a single-direction-blowing ventilation circuit formed by multiple plastic sealing tents
  • FIG. 6 illustrates a ventilation circuit formed by multiple plastic sealing tents connected in parallel
  • FIG. 7 illustrates variation of concentration of phosphine at different stack positions.
  • 1 -plastic sealing tent 1 -plastic sealing tent, 2 -tobacco stack, 3 -a group of inlet control joints and outlet control joints, 4 -the other group of inlet control joints and outlet control joints, 5 -pest trap, 6 -plastic film, 7 -plastic groove tube, 8 -rubber tube, 9 -main blower pipe, 10 -exhaust vent, 11 -main exhaust pipe, 12 -blowing vent.
  • a method for storing tobacco is described as follows.
  • Constructing a sealed plastic tent system for a tobacco stack capable of mechanically controlling internal storage conditions in a tobacco warehouse, namely, constructing six-side-sealed space for a tobacco stack capable of mechanically controlling storage conditions (as shown in FIGS. 1-1 , 1 - 2 , and 2 ), comprises steps of:
  • the ventilating pipe, the plastic sealing tent and the plastic film, and the inlet control joint, the outlet control joint, the connection pipe, and the pipe control valve are disposed on the plastic sealing tent to form a sealed plastic tent system for a tobacco stack capable of mechanically controlling internal storage conditions.
  • a group of inlet control joints and outlet control joints 3 (the number thereof is 1-30), and another group of inlet control joints and outlet control joints 4 (the number thereof is 1-30) are respectively disposed on any opposite sides of the plastic sealing tent 1 , or on positions at the top of the plastic sealing tent and on the plastic film 6 (or referred to as plastic base interlining) corresponding to each other, or a group of inlet control joints and outlet control joints are disposed on the plastic film 6 , and the other group of inlet control joints and outlet control joints are disposed at the top of and on four sides of the plastic sealing tent.
  • a group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ) are disposed on the left side of the plastic sealing tent 1
  • the other group of inlet control joints and outlet control joints 4 (or a group of inlet control joints and outlet control joints 3 ) are disposed on the right side of the plastic sealing tent 1 .
  • a skirt of the plastic sealing tent in the vicinity of the ground and the plastic film 6 are double laminated or folding sealed using the following method: double laminating the skirt of the plastic sealing tent 1 in the vicinity of the ground and unnecessary parts in around the plastic film 6 , and then putting it into a plastic groove tube 7 with a groove, and pressing an elastic rubber tube 8 on the plastic groove tube for fixing whereby forming tightly sealed storage space.
  • the group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ) operate as air exchange channels between the sealed space surrounded by the plastic sealing tent and the outside as being switched on, and keep the sealed space surround by the plastic sealing tent at a completely sealed state as being switched off.
  • the group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ) can be control joints capable of controlling air exchange, and can employ various structure and materials (such as metal or plastics), a commonly-used structure is that a control valve is disposed on the pipe, or a screw-connected and closed end cover is disposed on an end of the pipe, or a lid is pressed into an internal hole on an end of the pipe, and so on.
  • the group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ) operate as exchange channels of gas and medium between the sealed space surrounded by the plastic sealing tent 1 and the tobacco stack 2 and the outside, and of air in the tobacco stack, and can be freely switched on or off; the plastic sealing tent 1 can facilitate separated pest control and gas fumigated disinfestation at any time, and maintain tight sealing of the tent for the tobacco stack after fumigation until a storage cycle for the tobacco leaves is finished; after switching on a group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ) and connecting them to corresponding devices, functions such as fumigated disinfestation, toxicant elimination and dehumidification can be facilitated; after switching off a group of inlet control joints and outlet control joints 3 (or the other group of inlet control joints and outlet control joints 4 ), a storage and maintenance environment with stable sealing performance can be kept in the sealed tobacco stack.
  • the plastic sealing tent 1 and the plastic film 6 form a plastic sealing tent for a tobacco stack capable of mechanically controlling a storage environment of the tobacco leaves.
  • a pipe valve is connected on a pipe connecting the group of inlet control joints and outlet control joints 3 and the other group of inlet control joints and outlet control joints 4 on the plastic sealing tent with the branch vent.
  • a pest trap 5 is disposed in the sealed space surrounded by the plastic sealing tent and the plastic film.
  • the plastic sealing tent for a tobacco stack in step 1) can be made into a group of ventilating systems for plastic sealing tent for tobacco stacks according to one of the following methods:
  • the phosphine gas can be generated by putting aluminum phosphide or magnesium phosphide tablets into the tobacco stack, and then the aluminum phosphide tablets naturally absorb water in the air, deliquesce and finally generate phosphine, or by putting the aluminum phosphide into a phosphine generator, which reacts with water and generates phosphine gas, and finally the gas is mixed with carbon dioxide and then injected into the sealing stack.
  • the inlet control joint and the outlet control joint on one side of the plastic sealing tent are connected to the exhaust gas filtering and purifying device for fumigation via the main ventilating pipe, the centrifugal exhauster, and the inlet control joint and the outlet control join on the other side of the plastic sealing tent are switched on, whereby pumping out poisonous exhaust gas in the sealed space formed by the plastic sealing tent and the plastic film during fumigation, and blowing the gas into the exhaust gas filtering and purifying device for fumigation for further filtering and purification.
  • the Moshan warehouse of Wuhan Tobacco Co., Ltd used the above-mentioned fumigation method combining high-concentration nitrogen with low-dose phosphine to perform fumigated disinfestation in a plastic sealing tent for a tobacco stack in the 19 th warehouse from October to November in 2011, and comparatively satisfactory pest killing effect was obtained.
  • the test comprises tightness detection of the tobacco stack, manual repairing of film of a tent, and rearrangement of plastic grooves and pipes, whereby ensuring tightness at different stack positions meet inflating requirements. Firstly, beetles are put in stacks, and then inflation, exhaust and detection start, after several times of repeation, as nitrogen concentration in the stacks reaches a certain value, aluminum phosphide is put in, sealing time is set, and finally the pests are determined whether die or not.
  • a sealing mouth is opened, and the exhauster is used for exhausting until the film is tightly attached to a smoke box, at the time inflation is stopped, a nitrogen transmission pipe is connected to a gas supply opening of the stack, and nitrogen filling starts, as the film is expanded, inflation is stopped, after half an hour, nitrogen concentration is tested, if it does not reach a standard, the above process (exhaust, inflation and test) is repeated until a predetermined concentration is reached.
  • Nitrogen concentration is tested once every day, and stacks leaking gas are supplied with gas, until the standard is reached.
  • aluminum phosphide tablets are put into the stack according to size of the stack positions and a dosage of 1 g/m 3 , and living states of the beetles in the stacks are checked in the 3 rd , 7 th , 10 th , 13 th , and 16 th days, and the number and growth status thereof are recorded.
  • each stack position reaches the predetermined concentration on October 26, drugs are put in the position (dosage of the aluminum phosphide tablet is 1 g/m 3 ), phosphine concentration in the plastic sealing tent is illustrated in FIG. 7 .
  • phosphine concentration in the plastic sealing tent is illustrated in FIG. 7 .
  • brushes are used to slightly contact therewith, and results are recorded as shown in the following Table 2:
  • the nitrogen generator can employ a pressure swing adsorption nitrogen generator, or a membrane nitrogen generator.
  • Operation performance of the nitrogen generator can be determined by testing oxygen concentration in the sealing stack via an oxygen concentration detector or an automatic oxygen detector.
  • any one or more of the following methods is used to remove them: single-direction blowing and dehumidification of the dehumidifier: connecting the inlet control joint and the outlet control joint on one side of the plastic tent of the tobacco stack with an air outlet of the dehumidifier via a ventilating pipe, switching on the inlet control joint, the outlet control joint, the valve on the connection pipe, and the dehumidifier, and simultaneously switching on the inlet control joint and the outlet control joint on the other side of the plastic sealing tent of the tobacco stack, whereby blowing and dehumidifying the sealed space of the tobacco stack in a single direction, fresh air is gradually introduced and used to replace old and humid air in the tobacco stack, until relative air humidity in sealed space formed by the plastic sealing tent and the plastic film is less than 65%.
  • This example is almost the same as example 1, except that: 2) after step 1), mixed gas of nitrogen and sulfuryl fluoride is mechanically introduced for fumigant prevention whereby preventing pests in the tobacco stack.
  • sulfuryl fluoride can be contained in a steel cylinder purchased from a relevant manufacturer.
  • This example is almost the same as example 1, except for a working mode of manually or mechanically removing heat and humidity in the tobacco stack.
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • This example is almost the same as example 1, except for a working mode of manually or mechanically removing heat and humidity in the tobacco stack.
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • This example is almost the same as example 1, except that: 2) after step 1), mixed gas of nitrogen and sulfuryl fluoride is mechanically introduced for fumigant prevention whereby preventing pests in the tobacco stack, and heat and humidity in the tobacco stack are manually or mechanically removed:
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • This example is almost the same as example 5, except for a working mode of manually or mechanically removing heat and humidity in the tobacco stack.
  • step 1) the following step is taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • the single-direction blowing and dehumidification system of the dehumidifier connects the inlet control joint and the outlet control joint on the other side of the plastic sealing tent with a centrifugal exhauster via the ventilating pipe, the centrifugal exhauster improves circulating dehumidification efficiency within the sealing tent of the tobacco stack by exhausting and driving of the centrifugal exhauster.
  • This example is almost the same as example 5, except for a working mode of manually or mechanically removing heat and humidity in the tobacco stack.
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • This example is almost the same as example 1, except that after constructing the sealed plastic tent system in the tobacco stack capable of mechanically controlling internal storage conditions, phosphine fumigant is used to prevent pests in tobacco leaves according to the following steps: combining phosphine with carbon dioxide for fumigation, switching off the inlet control joint and the outlet control joint on the plastic sealing tent, calculating dosage of aluminum phosphide required by the plastic sealing tent according to dosage of 0.5-3 g/m 3 , and amount of carbon dioxide required by the plastic sealing tent according to dosage of 10-30 g/m 3 , intensively mixing phosphine generated by carbon dioxide and aluminum phosphide in a steel cylinder, and injecting phosphine into the sealed space surrounded by the plastic sealing tent via an applicator, volume concentration of phosphine being 30-700 ppm, and sealed state of the plastic tent kept for more than three days.
  • a method for storing tobacco comprises steps of:
  • a method for storing tobacco comprises steps of:
  • mixed gas of nitrogen and sulfuryl fluoride is introduced for fumigant prevention, and the following steps are taken for fumigant prevention of pests in the tobacco stack:
  • a method for storing tobacco comprises steps of:
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • the single-direction blowing and dehumidification system of the dehumidifier connects the inlet control joint and the outlet control joint on the other side of the plastic sealing tent with a centrifugal exhauster via the ventilating pipe, the centrifugal exhauster improves circulating dehumidification efficiency within the sealing tent of the tobacco stack by exhausting and driving of the centrifugal exhauster.
  • a method for storing tobacco comprises steps of:
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • a method for storing tobacco comprises steps of:
  • step 1) the following steps are taken to remove heat and humidity in the tobacco stack in the sealed space formed by the plastic sealing tent and the plastic film:
  • a method for storing tobacco comprises steps of:
  • step 1) as heat and humidity are accumulated in the tobacco stack within sealed space formed by the plastic sealing tent and the plastic film, any one or more of the following methods are used to remove them:

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  • Tents Or Canopies (AREA)
  • Engineering & Computer Science (AREA)
  • Catching Or Destruction (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Storage Of Harvested Produce (AREA)
US13/716,082 2011-12-28 2012-12-14 Method for storing tobacco Abandoned US20130168457A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011104487840A CN102551184A (zh) 2011-12-28 2011-12-28 一种烟叶堆垛塑料帐幕密封机械调控贮存方法
CN201110448784.0 2011-12-28

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CN (2) CN102551184A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
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CN110104240A (zh) * 2019-05-08 2019-08-09 杭州市粮食收储有限公司义桥分公司 自动嵌膜机
CN112515228A (zh) * 2020-11-30 2021-03-19 四川金叶生物防治有限公司 一种用于立体货架垛位的密封装置

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CN102835729A (zh) * 2012-09-28 2012-12-26 深圳烟草工业有限责任公司 一种烟叶的熏蒸杀虫方法
CN103404957B (zh) * 2013-07-10 2015-03-25 四川金叶生物防治有限公司 一种气体成分和环境因子可控的烟叶密封贮藏养护方法
CN104322479B (zh) * 2014-11-19 2016-10-12 湖南华望熏蒸消毒有限公司 一种仓储用无底膜帐幕密封装置及方法
CN105433432A (zh) * 2015-12-29 2016-03-30 四川金叶生物防治有限公司 一种烟叶的富氮低氧密封贮藏养护方法
CN108030137B (zh) * 2017-12-26 2020-04-24 云南省烟草公司昆明市公司 一种原烟去青装置及其去青方法
CN108208918B (zh) * 2018-02-02 2023-06-23 武汉东昌仓贮技术有限公司 一种熏蒸杀虫帐幕
CN113545512B (zh) * 2020-04-26 2022-07-29 湖南华望熏蒸消毒有限公司 一种烟叶堆垛帐幕通风除湿方法
CN111846626B (zh) * 2020-07-07 2022-03-29 武汉颐达生物工程有限公司 机械气调模式下的农产品包装与堆垛密闭贮存方法
CN113207840B (zh) * 2021-05-20 2022-12-23 河南中烟工业有限责任公司 一种箱式贮叶周转箱内烟虫杀灭方法
CN115474703B (zh) * 2021-05-31 2024-05-07 贵州中烟工业有限责任公司 一种三段式烟叶养护方法
CN113367374A (zh) * 2021-07-16 2021-09-10 湖南华望熏蒸消毒有限公司 一种双层烟叶储存装置
CN114689800B (zh) * 2022-03-29 2023-10-20 双工方程(武汉)科技发展有限公司 一种仓储烟叶害虫自动监测计数系统的倚层分置方法
CN114916324A (zh) * 2022-05-12 2022-08-19 国家粮食和物资储备局科学研究院 一种成品粮堆垛帐幕及气调储粮系统
CN115669991A (zh) * 2022-10-27 2023-02-03 天津森罗科技股份有限公司 一种烟草气调养护系统
CN115581309B (zh) * 2022-10-27 2024-09-27 天津森罗科技股份有限公司 一种用于烟草气调养护的综合监测气调站

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CN110104240A (zh) * 2019-05-08 2019-08-09 杭州市粮食收储有限公司义桥分公司 自动嵌膜机
CN112515228A (zh) * 2020-11-30 2021-03-19 四川金叶生物防治有限公司 一种用于立体货架垛位的密封装置

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CN102551184A (zh) 2012-07-11
CN102845823B (zh) 2015-01-14

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