Method for reducing polyaromatic hydrocarbon content in tar of cigarette smoke

A technology of polycyclic aromatic hydrocarbons and cigarette smoke, applied in the field of irradiation technology, can solve the problems of difficult operation safety control technology, poor mobility, weakened ray intensity, etc., and achieve improved smoking safety, strong adaptability, The effect of high radiation efficiency

Active Publication Date: 2012-07-18
河南省科学院同位素研究所有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although γ-ray irradiation technology can achieve the effect of reducing focus and harm, radioactive isotopes have a half-life, and the ray intensity decreases with time, and there are disadvantages such as low irradiation efficiency, poor mobility, and difficult operation safety control technology. The γ-ray irradiation technology is difficult to combine with the existing tobacco processing technology, and it cannot be popularized and applied in industrial production.

Method used

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  • Method for reducing polyaromatic hydrocarbon content in tar of cigarette smoke
  • Method for reducing polyaromatic hydrocarbon content in tar of cigarette smoke
  • Method for reducing polyaromatic hydrocarbon content in tar of cigarette smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Randomly take 150kg of first-cured tobacco leaves, pack each 50kg into a box, a total of 3 boxes, and pack them in a corrugated box with a length x width x height of 70cm x 60cm x 50cm. The stacking thickness of the tobacco leaves in the carton is 26-72cm. 0.20~0.34g / cm 3 ;Place the packaged tobacco leaves on the conveying device with a conveying speed of 0.02-0.3m / s; the tobacco leaves placed on the conveying device are irradiated with electron beam / X-rays generated by an electron accelerator, and the energy of the electron accelerator is 5-10MeV , the beam current is 0.3-20mA, the beam power is 10-20kW, the maximum scanning width is 100cm, the scanning frequency is 5-15Hz, the irradiation dose is 1kGy, the way of secondary irradiation is adopted, and the tobacco leaves are transported through the conveying device twice. The scanning window of the electron accelerator is irradiated, and half of the radiation dose is received at a time. After the first irradiation, the ...

Embodiment 2

[0030] According to the steps similar to the above-mentioned Example 1, 3 boxes of re-cured tobacco leaves packed in standard boxes were randomly selected. Use 5kGy dose of X-rays for irradiation treatment. After irradiation, the tobacco leaves are rolled by a cigarette rolling machine, and 40 cigarettes that meet the measurement requirements are randomly selected. According to the standard conditions stipulated in GB / T 19609-2004, a smoking machine is used to simulate the state of human smoking. , using Cambridge filter to collect polycyclic aromatic hydrocarbons in flue gas tar, using gas chromatography / mass spectrometry to determine the content of polycyclic aromatic hydrocarbons such as benzo[a]pyrene, benzo[a]anthracene, and Chrysene, to Corresponding unirradiated cigarette samples served as controls and were evaluated for smoking. The results are shown in Table 2.

[0031] Table 2 Contents and changes of polycyclic aromatic hydrocarbons in red-cured tobacco before and a...

Embodiment 3

[0034]According to the steps similar to Example 1, 3 boxes of finished cigarettes were randomly taken, the cartons were 47.5cm x 26cm x 59.5cm in length x width x height, each box weighed 15kg, and the quantity was 50. The electron beam with a dose of 10kGy is used for irradiation treatment. After irradiation, 40 cigarettes that meet the measurement requirements are randomly selected. According to the standard conditions stipulated in GB / T 19609-2004, a smoking machine is used to simulate the state of human smoking, and a Cambridge filter is used to collect cigarettes. PAHs in gas tar, the content of PAHs such as benzo[a]pyrene, benzo[a]anthracene and Chrysene was determined by gas chromatography / mass spectrometry, and the corresponding unirradiated Cigarette samples served as controls and were evaluated for smoking. The results are shown in Table 3.

[0035] Table 3 Contents and changes of polycyclic aromatic hydrocarbons in finished cigarettes before and after irradiation ...

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Abstract

The invention discloses a method for reducing the polyaromatic hydrocarbon content in tar of cigarette smoke. The method comprises the steps: packaging tobacco leaves/finished products of cigarettes with cartons, wherein stacking thickness is 26-72cm and stacking density is 0.20-0.34g/cm<3>; and placing the tobacco leaf/cigarette carton on a conveyer at the conveying speed being 0.02-0.3m/s and irradiating the tobacco leaf/cigarette cartons with electron beams/X rays produced by an electron accelerator, wherein the electron accelerator has the energy being 5-10MeV, the beam flow being 0.3-20mA, the beam power being 10-20kW, the maximal scanning width being 100cm, the scanning frequency being 5-15Hz and the irradiation dose being 1-10kGy, the working temperature is set to be 5-35 DEG C, the tobacco leaf/cigarette cartons pass trough a scanning window of the electron accelerator twice to be irradiated, a distance between the center of each tobacco leaf/cigarette carton and the scanning window of the electron accelerator is 40-60cm during irradiation, and the ambient humidity is limited to be not more than 60% during working.

Description

technical field [0001] The invention belongs to the application field of irradiation technology, and also belongs to the technical field of tobacco tar reduction and harm reduction. Electron accelerator irradiation processing technology. Background technique [0002] Tobacco is one of the important economic crops in our country and occupies an important position in the national economy. At present, there are 1.1 billion smokers in the world, and there are more than 300 million in China. Smoking has become a social group behavior. As early as the 1930s, it was suggested that smoking is harmful to health. In particular, the Royal Society of Medicine in 1950 and the US Medical Administration in 1964 officially published a report on the relationship between smoking and health, clearly stating that smoking is harmful to the human body. As people pay more and more attention to health, the smoking safety of cigarettes has become a research hotspot in recent years, which has attra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24B15/22
Inventor 范家霖杜阅光王娟娟王广山张建伟陈云堂袁红星吕晓华杨保安郭东权李湘
Owner 河南省科学院同位素研究所有限责任公司
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