CN103238915A - Leaf tobacco processing method capable of selectively reducing release amount of NNK (Nitrosamine) in cigarette smoke - Google Patents

Abstract

The invention discloses a leaf tobacco processing method capable of selectively reducing a release amount of NNK (Nitrosamine) in cigarette smoke. The leaf tobacco processing method comprises the steps of: firstly, preheating wet leaf barrel, and charging when circulatory hot wind is at 80 DEG C to 120 DEG C; then adjusting a hot steam valve and a wet steam valve based on the positions of the processed leaf tobacco, and respectively controlling a temperature and a moisture content of the wet leaf tobacco; and finally, processing by adopting full steam at a temperature which is accordance with the technical requirements of YC/T146-2010 Leaf Tobacco Threshing and Redrying Process Specification. The method has obvious effects of selectively reducing the release amount of the NNK in the cigarette smoke, achieves the reduction amplitude of 11.20-38.21%, has good repeatability, is applicable to the practical threshing and redrying production, expands the leaf tobacco processing technology of reducing harmful components in the cigarette smoke, and has relatively good practical significance and reference function for harm reduction and tar reduction in the industry.

Description

A kind of tobacco leaf processing method of selectivity reducing cigarette fume NNK burst size

Technical field

The invention belongs to the beating and double roasting technical field, specifically relate to a kind of tobacco leaf processing method that can selectivity reducing cigarette fume NNK burst size.

Background technology

4-(N-methyl nitrosamino group)-the 1-(3-pyridine radicals)-1-butanone (NNK) is the higher component of content among the tobacco-specific nitrosamine TSNAs, is that nicotine nitrosation in tobacco leaf modulation, processing and cigarette burning process forms.

NNK is a kind of potent derivant that optionally causes the rodent adenocarcinoma of lung, only 1 μ gNNK is once injected the high incidence that vole can be caused lung's cancer knurl, (the methyl nitrosamine is foretold 1-, and (it is unique known material that causes cancer of pancreas in the smoke of tobacco that 3-adjoins eyelash base fore-telling 1-butanols (NNAL) to its main metabolites N '-4-, therefore spells out NNK as one of important indicator that characterizes cigarette mainstream flue gas harmfulness in 2008 " State Tobacco Monopoly Bureau is about the notice of further propelling lowering harm and decreasing coking work " (No. [2008] 471, domestic cigarettes section).This notice also clearly proposes: should strengthen raw tobacco material to the research of 7 harmful components burst size influences of cigarette smoke, for lowering harm and decreasing coking application technical research and low harm research and development of products provide theory support.

In recent years, people have carried out the method research that reduces cigarette smoke NNK from aspects such as tobacco leaf modulation technique, paper process thin slice, cigarette additive, special material filter tip and cigarette processing methods, obtain corresponding achievement in research and have declared the technological invention patent.As publication number be the patent of the CN101268859A adsorption function that proposed to utilize sorbing material with the absorption of the harmful components in the tobacco solubility extract, thereby reduce harmful components in the extract, finally reach the purpose that reduces harmful components NNK.The patent of application number 201010288153.2 proposes that cigarette manufacturing procedure microwave is loose by optimizing, the parameter of loosening and gaining moisture and HT+ baking silk, can reduce the content of cigarette smoke NNK.But up to now, Shang Weiyou reduces the method report of NNK content in the cigarette smoke by the improvement of beating and double roasting process.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of improved tobacco leaf processing method is provided, by preheating leaves moisting bucket, adopts pressure decatizing vapour leaves moisting and low temperature roasting operation slowly, and optimize this 3 procedure combination of process parameters, finally reach the purpose of selectivity reducing cigarette fume NNK burst size.

Purpose of the present invention is achieved by the following technical programs.

Except as otherwise noted, percentage of the present invention is mass percent.

A kind of tobacco leaf processing method of selectivity reducing cigarette fume NNK burst size may further comprise the steps:

(1) leaves moisting ladle preheating: before feeding intake, setting the steam pressure value is 0.8～1MPa, opens heat exchanger, and preheating leaves moisting tube begins to feed intake after making circulating air reach 80 ℃～120 ℃;

(2) pressure decatizing vapour leaves moisting: according to processing tobacco leaf position, regulate heat, moist steam valve, make temperature and the moisture content of a profit tobacco leaf reach following requirement respectively: 1. upper tobacco leaf: temperature is 55 ℃～65 ℃, and moisture is 18%～21%; 2. tobacco leaf in the middle part of: 50 ℃～56 ℃, moisture is 18%～20%; 3. lower tobacco leaf: 50 ℃～58 ℃, moisture is 18%～20%; When two profit moisture and temperature reach the technological requirement of regulation " YC/T146-2010 tobacco threshing and redrying technological specification " in, open front/rear steam valve, adjust two profit moisture and temperature, circulating air is controlled 80～100 ℃ of scopes;

(3) redrying moisture regain: adopt pressure decatizing vapour, temperature meets " YC/T146-2010 tobacco threshing and redrying technological specification " technological requirement.

With respect to prior art, the present invention has the following advantages:

1, in beating and double roasting, adopt pressure decatizing vapour leaves moisting and low temperature to bake the burst size that coordination technique selectively reduces NNK in the raw tobacco material flue gas slowly;

2, the effect of the burst size of NNK is obvious in this choice of technology reduction raw tobacco material flue gas, and the reduction amplitude is 11.20～38.21%;

3, the feasible practicality of method.In industry tobacco threshing and redrying operation, realize this technology easily;

4, in tobacco leaf processing, can selectively effectively reduce the burst size of NNK in the raw tobacco material flue gas, reduce the burst size of NNK the cigarette product flue gas from raw tobacco material at all.

The specific embodiment

The present invention is described in further detail below in conjunction with embodiment, but embodiment is not limited to the technical solution.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, be equal to according to the solution of the present invention and inventive concept thereof and replace or change, all should be encompassed in protection scope of the present invention.

Embodiment 1

Adopt " YC/T146-2010 tobacco threshing and redrying technological specification " (abbreviation standard process techniques) and the technology of the present invention method processing Kunming K326BSF tobacco leaf in 2011 respectively, every 30min at packing place sampling 200g, totally 10 times, mix, in order to measuring the burst size of NNK in the tobacco sample flue gas.

At GB/T16447-2004 " atmospheric environment that tobacco and tobacco product are regulated and tested " defined terms adjusting cigarette sample, at GB/T16450-2004 " conventional analysis defines and standard conditions with smoking machine " defined terms smoking cigarette, adopt GB/T23228-2008 " the mensuration gas-chromatography of the peculiar N-nitrosamine of tobacco in the cigarette mainstream smoke total particulate matter-heat energy is analyzed the coupling method " mensuration to process the burst size of tobacco leaf Kunming in 2010 K326BSF flue gas NNK.

The result shows: the NNK burst size in the contrast tobacco sample flue gas is that 11.08ng/ props up, and the NNK burst size of optimizing in the tobacco sample flue gas is that 9.84ng/ props up, and the K326BSF flue gas NNK burst sizes in 2010 that adopt steam leaves moisting and low temperature to bake coordination technique processing have slowly reduced 11.20%(than the contrast tobacco leaves and seen Table 1).

Table 1 different processing methods Kunming in 2010 K326BSF flue gas NNK burst size measurement result

Embodiment 2

Adopt " YC/T146-2010 tobacco threshing and redrying technological specification " and the technology of the present invention method to process the red big C3F tobacco leaf in 2011 Kunming respectively, every 30min at packing place sampling 200g, totally 10 times, mix, in order to measuring the burst size of NNK in the tobacco sample flue gas.

At GB/T16447-2004 " atmospheric environment that tobacco and tobacco product are regulated and tested " defined terms adjusting cigarette sample, at GB/T16450-2004 " conventional analysis defines and standard conditions with smoking machine " defined terms smoking cigarette, adopt GB/T23228-2008 " the mensuration gas-chromatography of the peculiar N-nitrosamine of tobacco in the cigarette mainstream smoke total particulate matter-heat energy is analyzed the coupling method " mensuration to process the burst size of the tobacco leaf red big C3F flue gas NNK in 2011 Kunming.

The result shows: the NNK burst size in the contrast tobacco sample flue gas is that 8.53ng/ props up, and the NNK burst size of optimizing in the tobacco sample flue gas is that 5.27ng/ props up, and the red big C3F flue gas NNK burst size in 2011 Kunming that adopts steam leaves moisting and low temperature to bake coordination technique processing has slowly reduced 38.21%(than the contrast tobacco leaf and seen Table 2).

The red big C3F flue gas NNK burst size measurement result in table 2 different processing methods 2011 Kunming

Embodiment 3

Adopt " YC/T146-2010 tobacco threshing and redrying technological specification " and the technology of the present invention method to process 2011 Kunming cloud and mist 87X2F tobacco leaves respectively, every 30min at packing place sampling 200g, totally 10 times, mix, in order to measuring the burst size of NNK in the tobacco sample flue gas.

At GB/T16447-2004 " atmospheric environment that tobacco and tobacco product are regulated and tested " defined terms adjusting cigarette sample, at GB/T16450-2004 " conventional analysis defines and standard conditions with smoking machine " defined terms smoking cigarette, adopt GB/T23228-2008 " the mensuration gas-chromatography of the peculiar N-nitrosamine of tobacco in the cigarette mainstream smoke total particulate matter-heat energy is analyzed the coupling method " mensuration to process the burst size of tobacco leaf 2011 Kunming cloud and mist 87X2F flue gas NNK.

The result shows: the NNK burst size in the contrast tobacco sample flue gas is that 2.60ng/ props up, and the NNK burst size of optimizing in the tobacco sample flue gas is that 1.87ng/ props up.The 2011 Kunming cloud and mist 87X2F flue gas NNK burst sizes that adopt steam leaves moisting and low temperature to bake coordination technique processing have slowly reduced 28.07%(than the contrast tobacco leaves and have seen Table 3).

Table 3 different processing methods 2011 Kunming cloud and mist 87X2F flue gas NNK burst size measurement results

Claims (1)

1. the tobacco leaf processing method of a selectivity reducing cigarette fume NNK burst size may further comprise the steps:

(1) leaves moisting ladle preheating: before feeding intake, setting the steam pressure value is 0.8～1MPa, opens heat exchanger, and preheating leaves moisting tube begins to feed intake after making circulating air reach 80 ℃～120 ℃;

(2) pressure decatizing vapour leaves moisting: according to processing tobacco leaf position, regulate heat, moist steam valve, make temperature and the moisture content of a profit tobacco leaf reach following requirement respectively: 1. upper tobacco leaf: temperature is 55 ℃～65 ℃, and moisture is 18%～21%; 2. tobacco leaf in the middle part of: 50 ℃～56 ℃, moisture is 18%～20%; 3. lower tobacco leaf: 50 ℃～58 ℃, moisture is 18%～20%; When two profit moisture and temperature reach the technological requirement of regulation " YC/T146-2010 tobacco threshing and redrying technological specification " in, open front/rear steam valve, adjust two profit moisture and temperature, circulating air is controlled 80～100 ℃ of scopes;

(3) redrying moisture regain: adopt pressure decatizing vapour, temperature meets " YC/T146-2010 tobacco threshing and redrying technological specification " technological requirement.