CN102539620A - Device and method for measuring burning and sucking temperature of cigarette paper layer - Google Patents

Abstract

The invention relates to a device for measuring the burning and absorption temperature of a cigarette paper layer and a measuring method thereof, which belong to the technical field of cigarette temperature measurement. The device consists of an air pump 1, a flow stabilizer 2, a gas flow meter 3, a cigarette holder 4, a thermocouple probe 6, a thermocouple thermometer 7 and a computer 8. The method is: the device is placed in a constant temperature and humidity room; after the cigarettes are balanced in a constant temperature and humidity box for 48 hours, they are selected according to the weight of the cigarettes: average ± 20mg, resistance of draw: average ± 50Pa, and the selected cigarette samples 5 is inserted into the cigarette holder 4, and the thermocouple probe 6 is in contact with the surface of the cigarette paper in the cigarette sample 5; after starting the computer 8, the thermocouple thermometer 7 is turned on, and then the air pump 1 is turned on, and then the flow regulator 2 is turned on, Adjust the flow rate of the gas flow meter 3 to 1050 cm ³ /min, light a cigarette and collect the burning and smoking temperature data of the cigarette paper layer. The measuring method is simple and accurate, and can effectively measure the combustion and absorption temperature of the cigarette paper layer. The measuring device has the advantages of simple structure, convenient operation, low cost, and convenient disassembly and cleaning.

Description

A device for measuring the burning and absorption temperature of cigarette paper layer and its measuring method

Technical field:

The invention relates to a device for measuring the burning and absorption temperature of a cigarette paper layer and a measuring method thereof, belonging to the technical field of cigarette temperature measurement.

Background technique:

Cigarette paper belongs to thin paper, generally between 25 and 30 g·m ^-2 , as an auxiliary material for cigarettes, it occupies an important position in the tobacco industry ^[1-2] . Cigarette paper accounts for about 5% of the weight of cigarettes. Because it directly participates in the combustion of cigarettes, and controls the combustibility of cigarettes and the dilution of smoke, it affects the flammability, flavor and tar production of cigarettes, as well as the mainstream Changes of seven harmful components such as carbon monoxide in flue gas ^[3-8] . Therefore, it is necessary to strengthen the research on cigarette paper, adjust and improve the cigarette paper so that it can synergize with shredded tobacco in physical and chemical aspects, and have a positive impact on the combustion process, so as to develop functional cigarette paper to reduce harm and reduce tar for cigarette products.

The temperature distribution of cigarettes during the smoking process is an important indicator that reflects the types and degrees of chemical reactions and physical processes that occur in tobacco. In order to fully simulate the actual combustion conditions of cigarettes, it is first necessary to establish a test device for drawing the smoking temperature distribution of cigarettes. This kind of work has been carried out earlier in foreign countries. Dr. Baker of British American Tobacco Co., Ltd. has measured and mapped the temperature of cigarettes during smoking and smoldering Distribution map ^[9-13] ; there are also reports on domestic testing and research on the burning and smoking temperature of cigarettes ^[14-18] . The literature reports at home and abroad mainly focus on the measurement of the temperature of the combustion cone of cigarettes. The measurement of the temperature change of the cigarette paper layer and the setting of the temperature in its thermal cracking conditions have not been reported so far.

At present, there is no commercial test device for the temperature field test of the cigarette smoking process. Through literature research, it is found that there are mainly two methods for measuring the combustion temperature of cigarettes ^{[9, 13-18]} : first, contact test Temperature, that is, through the joint test of the temperature sensor and the data acquisition system. Second, non-contact temperature measurement, testing the temperature field of the cigarette burning cone through an infrared thermal imager. The contents tested by the two methods are complementary to each other. The first method is to test the temperature field of the bulk phase during the smoking process of the cigarette, and the second method is to test the surface temperature field of the cigarette burning cone. Since only a few (≤6) thinner temperature sensors (i.e. tiny thermocouples or tiny optical fibers are used in the implementation of the first method, inserting too many thermocouple wires will destroy the physical structure of the cigarette), If you use the national standard suction mode (suction capacity: 35cm ³ , suction time per puff: 2s, puff per minute), the positions where the thermocouples are inserted are not all the highest temperature points of the combustion cone. For this reason, in overcoming the deficiencies of the prior art, a continuous suction device has been developed. The flow rate of the continuous suction mode converted from the suction capacity of the national standard suction mode is 1050cm ³ /min. The setting of the highest pyrolysis temperature for the real combustion state of the paper layer provides a measurement method and a suction device, which not only provides technical support for the research and development of auxiliary materials for the cigarette paper layer, but also makes up for the fact that most of the commercially available smoking machines are intermittent and expensive , the disadvantage that the actual operation is relatively cumbersome.

There have been reports on the determination method of the smoking temperature of cigarettes. But through document search, do not find the public report of the same document as the content of the present invention.

references:

[1] Li Liang. Development Status of Tobacco Industrial Paper [J]. Heilongjiang Paper, 2006, 34(3): 30-32.

[2] Mei Zhiliang. Research Progress of Cigarette Auxiliary Materials [M]. Beijing: China Light Industry Press, 1999.

[3] Xu Xinguo. Theory and Technology of Low Tar Cigarette Development [M]. Beijing: China Light Industry Press, 1998.

[4] Li Jinsong. Effects of cigarette paper on smoke volume and smoke components [J]. Heilongjiang Paper, 2006, 34(1): 35-36.

[5] Yang Zhanjun. Factors Influencing the Combustion Performance of Cigarette Paper [J]. Hubei Paper, 2005(4): 11-12.

[6] Liu Min. Discussion on cigarette paper and cigarette coke reduction [J]. Zhejiang Paper, 2005, 29(2): 31-32.

[7] Shao Ji. Effect and influence of cigarette paper on reducing tar in cigarettes [J]. Zhejiang Papermaking, 2007, 31(1): 13-15.

[8] Hou Yi, Liu Mingyou, Xu Chengcheng, Li Youming, Pan Quanli. The effect of cigarette paper on reducing the harm of smoke pollution and its research progress [J]. Paper Science and Technology, 2004, 23(6): 115-117.

[9] Baker R R. Temperature distribution inside a burning cigarette [J]. Nature, 1974, 247: 405-496.

[10] Baker R R. Temperature variation within a cigarette combustion coal during the smoking cycle [J]. High Temperature Science, 1975, 7: 236-247.

[11] Baker R R. Combustion and thermal decomposition regions inside a burning cigarette [J]. Combustion and Flame, 1977, 30: 21-32.

zur Tabakforschung International，1981，11(1)：1-17.[12]Baker R R.Variation of the gas formation regions within a cigarette combustion coal during the smoking cycle[J].

zur Tabakforschung International, 1981, 11(1): 1-17.

[13] Baker R R. Product formation mechanisms inside a burning cigarette [J]. Progress in Energy and Combustion Science, 1981, 7: 135-153.

[14] Zheng Saijing, Gu Wenbo, Zhang Jianping, Liu Baizhan, Zhang Xiangmin. Thermocouple method to measure internal dynamic temperature of cigarettes [J]. Tobacco Science and Technology, 2006, 1:5-9.

[15] Zheng Saijing, Gu Wenbo, Zhang Jianping, Liu Baizhan, Zhang Xiangmin. Using infrared temperature measurement technology to measure the combustion temperature of cigarettes [J]. Tobacco Science and Technology, 2006, 7: 5-10.

[16] Zheng Saijing. Research on dynamic testing and regulation technology of cigarette burning temperature [D]. Shanghai: Fudan University, 2005.

[17] Jiang Wei, Li Bin, Yu Chuanfang, Luo Dengshan. Effect of air permeability of cigarette paper on temperature distribution of cigarette burning cone [J]. Tobacco Science and Technology, 2007, 9: 5-10.

[18] Yang Tao, Yang Weizu. Film-insulated temperature-sensing probe and its application in measuring the internal temperature of cigarettes when they burn [P]. Chinese patent: 100405032, 2008-07-23.

Invention content:

The purpose of the present invention is to provide a device for measuring the burning and absorption temperature of cigarette paper layer and its measuring method, which provides analysis data and technical support for the research and development of auxiliary materials for cigarette paper layer.

The device for measuring the smoking temperature of the cigarette paper layer of the present invention is composed of a suction part and a temperature measuring part connected to the suction part by four thermocouple wires (6); wherein:

a. The suction part includes an air pump (1), a flow regulator (2) connected to the air pump (1), a gas flow meter (3) connected to the flow regulator (2), and a gas flow meter (3) A cigarette holder (4) connected and used for placing a cigarette sample (5) thereon;

b. The temperature measurement part includes four thermocouple probes (6) with a spacing of 1 cm, a thermocouple thermometer (7) connected to the four thermocouple probes (6), and a thermocouple thermometer (7) 8 connected computers.

The method for measuring the burning temperature of the cigarette paper layer with the device of the present invention, its concrete steps are as follows:

a. The device according to claim 1 is installed in a constant temperature and humidity room with a temperature of 22 ± 1°C and a humidity of 60% ± 3%;

b. The sample to be tested is placed in the environment described in step a and balanced for 48 hours. The balanced cigarette sample to be tested is selected according to its weight: average value ± 20mg, and draw resistance: average value ± 50Pa;

c. Insert the selected cigarette sample (5) into the cigarette holder (4), and the thermocouple probe (6) contacts the surface of the cigarette paper in the cigarette sample (5);

d. Turn on the thermocouple thermometer (7) after starting the computer (8), then start the air pump (1) and then turn on the flow regulator (2), and adjust the flow rate of the gas flowmeter (3) to 1050cm ³ /min , and then light the cigarette to collect the cigarette paper layer

Suction temperature data.

The device of the present invention is formed by connecting products and materials purchased in the market according to conventional methods as shown in FIG. 1 .

The advantages of the present invention are:

1. The measurement method is simple and accurate, and can effectively measure the burning and absorption temperature of the cigarette paper layer, so as to use pyrolysis technology to study the pyrolysis products of cigarette paper, and to develop functional cigarette paper to reduce harm and reduce tar in cigarette products. Experimental analysis data are provided.

2. The measuring device is simple in structure, easy to operate, low in cost, easy to disassemble and clean.

Description of drawings:

Accompanying drawing is the structural representation of device of the present invention.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is described in detail.

The present invention converts the suction capacity of the national standard suction mode into a flow rate of 1050cm ³ /min in the continuous suction mode, and its device consists of a suction part and a temperature measuring part connected to the suction part through four thermocouple probes 6 Composition; of which:

a. The suction part includes an air pump 1, a flow stabilizer 2 connected to the air pump 1, a gas flow meter 3 connected to the flow stabilizer 2, and a gas flow meter 3 connected to the air flow meter 3 for placing a cigarette sample 5 on it. Cigarette holder 4;

b. The temperature measurement part includes four thermocouple probes 6 with a distance of 1 cm, a thermocouple thermometer 7 connected to the four thermocouple probes 6, and a computer 8 connected to the thermocouple thermometer 7.

The operating steps of the inventive method are:

a. The device of the present invention is installed in a constant temperature and humidity room with a temperature of 22 ± 1°C and a humidity of 60% ± 3%;

b. The sample to be tested is placed in the environment described in step a and balanced for 48 hours. The weight of the balanced cigarette sample to be tested is based on its weight: average ± 20mg, resistance of draw: average ± 50Pa as selection conditions, for example, this test experiment The weight of the selected parameters for 3R4F standard smoke is 1040±20mg, and the draw resistance is 1255±50Pa;

c. Insert the selected cigarette sample 5 into the cigarette holder 4, and the thermocouple probe 6 is in contact with the surface of the cigarette paper in the cigarette sample 5;

d. Turn on the thermocouple thermometer 7 after starting the computer 8, then start the air pump 1 and then turn on the flow regulator 2, adjust the flow rate of the gas flow meter 3 to 1050cm ³ /min, then light the cigarette and start collecting the cigarette paper layer Burning temperature data.

The temperature data obtained by repeated testing of 20 reference cigarettes 3R4F are shown in Table 1 below, and the time for each thermocouple probe to rise from 100°C to the highest temperature point is recorded.

Table 1 The temperature data measured when the suction flow rate is 1050cm ³ /min and the time it takes to rise from 100°C to the highest temperature point

It can be seen from Table 1 that the average temperature measured at 1050mL/min is 348.3°C, and it takes an average of 25.8 seconds for each probe to rise from 100°C to the highest temperature point, and the heating rate is about 10.0°C/s. It provides an experimental basis for setting the heating program of pyrolysis of cigarette paper and glue.

Claims (2)

1. measure the device that the cigarette paper grate firing is inhaled temperature for one kind, it is characterized in that this device by pumping unit, reach the temperature measurement fraction that is connected with pumping unit through four thermocouple probes (6) and form; Wherein:

A. pumping unit comprises pneumatic pump (1), the current regulator (2) that is connected with pneumatic pump (1), and the gas meter (3) that is connected with current regulator (2), the cigarette that is connected and is used on it put cigarette sample (5) with gas meter (3) props up clamper (4);

B. temperature measurement fraction comprises that spacing is four thermocouple probes (6) of 1cm, the thermocouple temperature measurement appearance (7) that is connected with four thermocouple probes (6), and the computing machine 8 that is connected with thermocouple temperature measurement appearance (7) is formed.

2. measure the cigarette paper grate firing with the said device of claim 1 and inhale method of temperature for one kind, it is characterized in that the concrete steps of this method are following:

A. the said device of claim 1 being installed in temperature is 22 ± 1 ℃, and humidity is between 60% ± 3% constant temperature and humidity;

B. cigarette sample to be measured was put into the described environment balance of a step 48 hours, and the cigarette sample to be measured after the balance is according to its weight: mean value+20mg, and resistance to suction: mean value ± 50Pa is as selecting condition;

C. the cigarette sample that is selected (5) is inserted cigarette and prop up in the clamper (4), thermocouple probe (6) contacts with the cigarette paper in the cigarette sample (5) is surperficial;

D. open thermocouple temperature measurement appearance (7) after starting computing machine (8), open current regulator (2) after starting pneumatic pump (1) immediately, transfer to the flow of gas meter (3) and be 1050cm ³/ min puts burning smoke then and props up collection cigarette paper grate firing suction temperature data.

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