CN103284297B - Cut tobacco drying technology method adopting roller pipe sheet type cut tobacco dryer to reduce NAB release amount of cigarettes - Google Patents

Abstract

The invention discloses a cut tobacco drying technology method adopting a roller pipe sheet type cut tobacco dryer to reduce NAB release amount of cigarettes. The specific technological parameters are as follows: moisture content of incoming material at an HT inlet: 20%; steam pressure of HT: 0.278 MPa; hot air temperature: 76.1 DEG C; opening degree of a hot air ventilation door and opening degree of a damp-proof ventilation door: 100% and 30% respectively; and rotating speed of a cut tobacco drying cylinder: 13 rmp. The cut tobacco drying technology method has the benefits that the cut tobacco drying procedure is controlled to combine and adjust technological parameters and further reduce the NAB release amount of cigarettes, a new path to reduce coke of cigarettes is explored, and the method is of vital theoretical significance and practical application value; and key parameters in the cut tobacco drying procedure are selected, confirmed and optimized in the production technology range, so that the NAB release amount in main stream smoke of cigarettes is effectively reduced under the premise that stable sensory quality of cigarettes is kept.

Description

Cylinder drum tubular plate type cut tobacco dryer is adopted to reduce the baking silk method of cigarette NAB burst size

Technical field

The invention belongs to Harm reduction techniques field, relate to a kind of method reducing cigarette NAB burst size, be specifically related to a kind of method that technological parameter by adjustment baking silk equipment reduces cigarette NAB burst size.

Background technology

Smoking is harmful to your health has obtained the consistent of various circles of society and has generally acknowledged, under the promotion of the World Health Organization, many national government and various back suction cigarette group, the anti-smoking campaign in the whole world grows to even greater heights, and the social pressures that tobacco business is subject to are increasing.Specify in the Chinese government signed << Framework Convention on Tobacco Control >> that the Chinese government will work up more severe " Tobacco Control " laws and regulations, impel tobacco productive corporation while reduction releasing content of coke tar in cigarette, more strictly will control the burst size of main harmful components in cigarette smoke.For improving quality and the security of China's cigarette product, State Tobacco Monopoly Bureau clearly proposes should strengthen the influence research of raw tobacco material, Cigarette processing technique and auxiliary material design to harmful constituents in cigarette flue gas burst size, for lowering harm and decreasing coking application technical research and less harmful product development are provided fundamental basis.

As the NAB of one of tobacco-specific nitrosamine, due to its toxicity, be classified as 3 grades of carcinogenic substances by international cancer research institution.State Tobacco Monopoly Bureau also lists tobacco harmful substance detection range in NAB.At present, the approach reducing these type of harmful components has: in cigarette filter production process, add the material this type of material being had to adsorption capacity, or selects the tobacco leaf of tobacco-specific nitrosamine of low content as raw material of cigarette.Chinese patent ZL 201010288206.0 discloses a kind of cigarette processing method reducing NAB content,, loosening and gaining moisture loose from microwave and HT+ dry silk three operations and carry out process parameter optimizing respectively, all reach the object reducing NAB burst size in cigarette smoke, thus reach and optimize whole technology for making tobacco threds parameter and reduce the object of NAB burst size, what dry the employing of silk section in patent is cylinder Rotary drier, does not limit the baking silk equipment of other type.Dry the critical process that silk is production of cigarettes, drying silk technological parameter can produce material impact to cut tobacco physics, sense organ and chemical quality after baking, is the emphasis of technology for making tobacco threds research.

Realizing in process of the present invention, inventor finds to there is following technical problem in prior art:

1, each research institution have ignored specific baking silk technical parameter to the impact of the burst size of NAB;

2, differently dry silk equipment to affect difference to the burst size of NAB in cigarette product flue gas huge;

3, due to the particularity of tobacco product, strict requirement is had to baking silk moisture content of outlet, be generally 12% ± 0.5%, under guarantee equipment safety operation and Product Usability prerequisite, combination parameter can only be chosen control in respective adjustable extent, and determine that a parameters combination needs through a large amount of research experiments;

4, pilot production cost is large, and single test only raw material drops into 5-8 ton, cost more than 400,000, and needs to ensure that product can not become waste product in process of the test, adds the difficulty obtaining test data;

The parameter of 5, drying silk technique by adjustment reduces pernicious gas burst size, make to fall harmful effect reach best while, also to ensure that the aesthetic quality of cigarette remains on higher level difficulty large.

Summary of the invention

The object of the invention is, adopt cylinder drum tubular plate type cut tobacco dryer, by the drying process of adjustment cigarette primary processing technique, reduce cigarette NAB burst size, Sensory Quality of Cigarette also will be kept simultaneously to stablize.

The object of the present invention is achieved like this, a kind of baking silk method adopting SH314C type cylinder drum tubular plate type cut tobacco dryer to reduce cigarette NAB burst size is provided, software Design expert 7.1.3 is used to carry out experimental design to technological parameter, carry out testing according to the experimental program designed and detect sample main flume NAB burst size, draw equation: NAB=1.13-0.0566* hot blast throttle opening+0.0764* upsurge throttle opening-0.0598* drum speed-0.0255* entrance material water ratio, according to aforesaid equation and experimental verification, obtain the technological parameter after optimization as follows:

1), HT entrance supplied materials moisture: 20%;

2), HT steam pressure: 0.278MPa;

3), hot blast temperature: 76.1 DEG C;

4), hot blast throttle opening is 100%, and humidity discharging throttle opening is 30%;

5) silk cylinder rotating speed, is dried: 13rmp.

HT is the cut tobacco warming and humidifying operation adopting tunnel type cut tobacco warming and humidifying machine to carry out.

Corresponding Optimizing Process Parameters combination more than drying process application, effectively can reduce NAB burst size in obtained cigarette product flue gas and keep Sensory Quality of Cigarette to stablize simultaneously.

The invention has the beneficial effects as follows, control technology for making tobacco threds key point---drying process, under the prerequisite keeping Sensory Quality of Cigarette stable, select specific baking silk equipment---cylinder drum tubular plate type cut tobacco dryer carries out parameters combination adjustment, reach the object reducing cigarette NAB burst size, explore Harm reduction techniques and fall burnt new way, there is important theory significance and actual application value.

The present invention carries out screening to the emphasis parameter in drying process and assert and be optimized within the scope of production technology, is ensureing, under the prerequisite that Sensory Quality of Cigarette is stable, effectively to reduce cigarette NAB burst size.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is further elaborated.

Embodiment 1

The model of the present embodiment cylinder drum tubular plate type cut tobacco dryer used is SH314C, and Qinhuangdao Tobacco Machinery Co., Ltd. manufactures.The technology for making tobacco threds drying process cylinder drum tubular plate type cut tobacco dryer device parameter formulated by enterprise is produced the tobacco sample that obtains as blank sample; At silk producing procedures, tobacco sample that technique adjustment obtains is carried out for optimizing sample: HT entrance supplied materials moisture is 20% according to following parameter, HT steam pressure is 0.278MPa, hot blast temperature is 76.1 DEG C, hot blast throttle opening and humidity discharging throttle opening are respectively 100% and 30%, and drying silk cylinder rotating speed is 13rmp; Drying process carries out test parameters adjustment, and to produce the tobacco sample that obtains be test specimen; The flue gas NAB burst size of three kinds of samples and sensory evaluating smoking's score are in table 1.

Table 1:

As can be seen from Table 1, at the key point of technology for making tobacco threds---drying process, change above technological parameter, NAB in the tobacco sample flue gas obtained can be produced and high-volume reduce 23.03% than blank sample, have and significantly reduce NAB burst size effect, and sensory evaluating smoking must be divided into 82.5, compares with blank sample, aesthetic quality keeps stable.

The present invention is by experimental design, and screen each parameter of equipment, determine important test parameters, and these parameters be optimized, the concrete steps of optimizing process are as follows:

(1) for model be the cylinder drum tubular plate type cut tobacco dryer of SH314C, choose following controlled emphasis parameter and combine, and determine parameters scope, each parameter area is in table 2.

Table 2:

Factor	Title	Unit	Type	Lower limit	Reach the standard grade
						A	HT steam pressure	Mpa	Numeric type	0.1	0.4
B	Hot blast temperature	℃	Numeric type	70	110
						C	Hot blast throttle opening	％	Numeric type	30	100
D	Humidity discharging throttle opening	％	Numeric type	30	100
						E	Drum speed	rpm	Numeric type	9	13

F

Entrance material water ratio

％

Numeric type

18

20

(2) use software Design expert 7.1.3 to carry out experimental design to above-mentioned factor, carry out testing according to the experimental program designed and detect sample main flume NAB burst size, the results are shown in Table 1.

(3), after using software Design expert 7.1.3 to analyze, following equation is drawn:

NAB=1.13-0.0566* hot blast throttle opening+0.0764* humidity discharging throttle opening-0.0598* drum speed-0.0255* entrance material water ratio.

(4) according to aforesaid equation, with minimum NAB burst size for optimization aim, obtaining HT entrance supplied materials moisture is 20%, HT steam pressure is 0.278MPa, and hot blast temperature is 76.1 DEG C, and hot blast throttle opening and humidity discharging throttle opening are respectively 100% and 30%, when baking silk cylinder rotating speed is 13rmp, through checking, adopt the parameter after optimizing to carry out baking silk, main flume NAB burst size is minimum is 0.916ng/cig.

Claims (1)

1. the baking silk method adopting cylinder drum tubular plate type cut tobacco dryer to reduce cigarette NAB burst size, it is characterized in that, software Design expert 7.1.3 is used to carry out experimental design to technological parameter, carry out testing according to the experimental program designed and detect sample main flume NAB burst size, draw equation: NAB=1.13-0.0566* hot blast throttle opening+0.0764* upsurge throttle opening-0.0598* drum speed-0.0255* entrance material water ratio, according to aforesaid equation and experimental verification, obtain the technological parameter after optimization as follows:

1), HT entrance supplied materials moisture: 20%;

2), HT steam pressure: 0.278MPa;

3), hot blast temperature: 76.1 DEG C;

4), hot blast throttle opening is 100%, and humidity discharging throttle opening is 30%;

5) silk cylinder rotating speed, is dried: 13rmp;

The model of described cylinder drum tubular plate type cut tobacco dryer is SH314C type.