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A method for quickly reducing oxygen and killing insects in tobacco leaves

A tobacco leaf and fast technology, applied in the field of stored tobacco insecticide, can solve the problems of high concentration and high insecticidal cost, and achieve the effects of short oxygen reduction time, reduction of cycle time, and rapid and thorough insecticidal treatment.

Active Publication Date: 2016-02-10
湖南华望熏蒸消毒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method requires CO 2 The concentration is high, while the CO in the air 2 The concentration is only 0.03%, and the large-scale use of this method in tobacco factories is expensive

Method used

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  • A method for quickly reducing oxygen and killing insects in tobacco leaves
  • A method for quickly reducing oxygen and killing insects in tobacco leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, 50 rebaked tobacco sheets that have been partially infested with worms are used, and the volume of the smoke is about 30m 3 , the sealed space is a sealed tent. Such as figure 1 Shown is a schematic diagram of the connection between the sealed space and the pressure swing adsorption nitrogen production equipment in this embodiment.

[0036] This embodiment includes the following steps:

[0037] 1) Seal the stack of tobacco leaves with a sealed tent 1

[0038] Calculate the area of ​​the bottom film of the sealed tent according to the size of the stack of tobacco leaves, and lay moisture-proof materials such as kraft paper, honeycomb cardboard, and sacks at the bottom of the stack to prevent moisture and protect the bottom film of the sealed tent.

[0039] Then lay the airtight tent bottom film made of composite film on the moisture-proof material. In this embodiment, the plastic film of the airtight tent adopts a polyethylene composite film with a t...

Embodiment 2

[0050] In this example, 100 pieces of re-cured tobacco sheets that have been partially infested with insects are used, and the volume of the tobacco leaves is about 60m 3 , the sealed space is a sealed tent.

[0051] The steps included in this embodiment are basically the same as in Embodiment 1, the difference is that:

[0052] The sealed tent plastic film adopted in step 1) is a 0.10mm thick polypropylene composite film, and the oxygen transmission rate is less than 80mL / day·m 2 .

[0053] In step 2), when the oxygen detector detects that the oxygen concentration in the airtight tent is 2%, the pressure swing adsorption nitrogen production equipment is closed, and the pressure swing adsorption nitrogen production equipment has been running for 14 hours.

[0054] In step 3), when the carbon dioxide detector measures that the carbon dioxide concentration in the airtight tent is 25%, stop inflating.

[0055] After maintaining the gas concentration described in this example f...

Embodiment 3

[0057] In this example, 150 pieces of rebaked tobacco that have been partially infested with insects are used, and the volume of the tobacco is about 90m 3 , the sealed space is a sealed tent.

[0058] The steps included in this embodiment are basically the same as in Embodiment 1, the difference is that:

[0059] The sealed tent plastic film used in step 1) is a 0.12mm polyester composite film, and the oxygen permeability is less than 100mL / day·m 2 .

[0060] In step 2), when the oxygen detector detects that the oxygen concentration in the airtight tent is 0.5%, the PSA nitrogen-generating equipment is turned off, and the PSA nitrogen-generating equipment has been running for 48 hours.

[0061] In step 3), when the carbon dioxide detector measures that the carbon dioxide concentration in the airtight tent is 50%, stop inflating.

[0062] After maintaining the gas concentration described in this example for 2 days, the airtight tent was removed, and the mortality rate of to...

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Abstract

The invention relates to a method for killing injurious insects of tobaccos quickly by oxygen reduction. The method is characterized by comprising the following steps of: 1) sealing a tobacco stack by using hermetic space; 2) introducing nitrogen into the hermetic space by pressure swing adsorption nitrogen making equipment, so that the concentration of oxygen in the hermetic space is reduced to be below 5 percent; 3) introducing high-concentration carbon dioxide gas into the hermetic space, and regulating the concentration of the carbon dioxide in the hermetic space to be 3 to 50 percent, so that the concentration of oxygen in the hermetic space is below 2 percent; and 4) keeping the concentration of the gas at normal temperature for 2 to 10 days to kill the injurious insects of the tobaccos. The process of producing nitrogen to reduce the content of oxygen and charging carbon dioxide lasts for 10 to 48 hours and the process for killing the injurious insects in the hermetic space lasts for 3 to 10 days. The method has the advantages that the injurious insects of the tobaccos in the hermetic space can be killed completely within short time, and the economic loss caused by the injurious insects of the tobaccos is reduced; and the method is low in cost and does not have adverse effect on the tobaccos and environment.

Description

technical field [0001] The invention belongs to the technical field of stored tobacco insecticide, and in particular relates to a method for rapid deoxygenation and insecticide of tobacco leaves. Background technique [0002] Tobacco leaves need to be stored and maintained for 2-3 years before being made into cigarette products to complete the natural aging process of tobacco leaves and achieve the purpose of improving and improving the quality of tobacco leaves. The alcoholization process is generally carried out in warehouses, and tobacco leaves stored in warehouses for a long time are prone to insect erosion, which has always been a problem that the tobacco industry must pay attention to but is more troublesome. [0003] At present, the mainstream method of killing insects on tobacco leaves is the universal phosphine (PH) twice a year. 3 ), methyl bromide (CH 3 Br) and other fumigation to kill insects. Although the insecticidal effect of this method is obvious, due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A24B1/02
Inventor 刘胜祥敖悦扉瞿佳政岳骞
Owner 湖南华望熏蒸消毒有限公司
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