CN103901134A - Measurement device for HCN releasing amount in oxygen-poor combustion of tobaccos - Google Patents
Measurement device for HCN releasing amount in oxygen-poor combustion of tobaccos Download PDFInfo
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- CN103901134A CN103901134A CN201410151063.7A CN201410151063A CN103901134A CN 103901134 A CN103901134 A CN 103901134A CN 201410151063 A CN201410151063 A CN 201410151063A CN 103901134 A CN103901134 A CN 103901134A
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Abstract
The invention discloses a measurement device for an HCN releasing amount in oxygen-poor combustion of tobaccos. The measurement device comprises a stable-state combustion device, a combustion product conversion device, a CO2 analyzing device and a stable-state combustion product capturing device, wherein the stable-state combustion device is used for providing a stable temperature field, fuel supply and air supply for combustion; the combustion product conversion device is respectively connected with other three devices and is used for adjusting the conveying direction of a combustion product; the CO2 analyzing device is used for monitoring the concentration of CO2 in the product so as to judge whether the combustion is at a stable state or not; the stable-state combustion product capturing device is used for capturing HCN in a grain phase and a gas phase of the combustion product so as to carry out a combustion product by an ion chromatograph. According to the device disclosed by the invention, the oxygen-poor combustion environment of cigarette combustion and smoking can be effectively simulated through controlling an equivalent ratio and a temperature, so that the releasing amount of the HCN of the tobaccos can be accurately obtained.
Description
Technical field:
The present invention relates to a measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size.
Background technology:
Protein and amino acid when in cigarette smoke, HCN is mainly by cigarette burning in tobacco, burning or the cracking of special glycocoll, proline and diamino dicarboxylic acid form.Cigarette burning relates to the acute variation of tobacco, oxygen concentration and temperature, therefore studies burning condition most important for HCN content in the suitable means reduction cigarette smoke of selection on the impact of tobacco HCN release characteristics.Present stage, great many of experiments and numerical simulation result are verified, the glow state of cigarette burning environment in the rich hydrogen of oxygen deprivation, and also the rate of heat addition of cigarette while glowing is at 5-20 DEG C/s, the rate of heat addition in cigarette smoking process reaches as high as 500 DEG C/s, and the average rate of heat addition also has 30 DEG C/s.So the key of research result of combustion of tobacco HCN release characteristics is by regulating component of combustion to make the oxygen deprivation state of result of combustion of tobacco in heated at high speed.
Current, the research device of this respect mainly comprises hot weightless instrument and tubular furnace etc., but all has obvious shortcoming.Thermogravimetric analyzer only can carry out qualitative analysis and semi-quantitative analysis to milligram level sample HCN burst size, experimentation also mainly reflects the pyrolysis behavior of tobacco, there is larger difference with Actual combustion, and thermogravimetric analysis device cannot realize Fast Heating to sample (common heating furnace maximum heating speed be only 3 DEG C/s), cause sample heating rate and cigarette to glow and suction fuel heating environment differs greatly.Although and tubular furnace can be realized the Fast Heating of sample, experiment time cannot make result of combustion of tobacco pyrolysis in stable state, oxygen, sample and temperature three be in relative steady state, thereby be difficult to Accurate Determining HCN burst size.
ISO19700 standard has proposed equivalence ratio
concept, core is to control the generation speed (v of fuel
fuel) with the delivery rate (v of air
fuel) ratio, be shown below,
Wherein,
the supply of air when each element in finger fuel fully burns.When
time, represent the stable state combustion of material under oxygen deprivation.Therefore, by controlling equivalence ratio
and temperature just can be simulated cigarette combustion with meagre oxygen environment.Meanwhile, the stable state combustion tubular furnace proposing in standard ISO 19700 can be realized the Fast Heating to magnanimity tobacco, and this heating rate also approaches that cigarette glows and heating environment when suction fuel.
As fully visible, stable state combustion tubular furnace based on controlled equivalence ratio method can accurately be simulated the burning situation of cigarette while burning and sucking, to the HCN producing under specific burning situation gather and in addition quantitative test gather, just can the HCN burst size under simulation cigarette burning situation carry out Measurement accuracy to tobacco.
Summary of the invention:
For overcoming the defect of prior art, the object of the present invention is to provide a measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, this device can make result of combustion of tobacco in stable oxygen deprivation state, and can carry out analysis to measure to the burst size of HCN.
Technical solution problem of the present invention adopts following technical scheme:
One measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, it comprises:
Stable state combustion device, products of combustion conversion equipment, carboloy dioxide analysis device and stable state combustion product capturing device;
Described stable state combustion device comprises rotary heating furnace and annular-heating furnace controller, one end that quartz ampoule is located in described rotary heating furnace is fire end, the other end is non-fire end, be provided with seal at described non-fire end, quartz boat is located in described quartz ampoule and by outside stepper motor and is promoted in quartz ampoule, at the uniform velocity to move, on described seal, be provided with two through holes for supply air line path and stepper motor transmission path, described supply air line is communicated with outside feeder;
Described products of combustion conversion equipment is T-valve, and it is connected with outlet side, described carboloy dioxide analysis device, the described stable state combustion product capturing device of the rotary heating furnace of stable state combustion device respectively, for the flow direction conversion of products of combustion;
Described carboloy dioxide analysis device comprise the combustion products dilute case being communicated with described T-valve, the infrared instrument of non-scattering being communicated with described combustion products dilute case, with the vacuum pump that the infrared instrument of described non-scattering is communicated with, on described combustion products dilute case, be communicated with the second supply air line;
Described stable state combustion product trapping analytical equipment comprises the gas phase capturing device being communicated with by air pipe with described T-valve, and in described feed channel, is provided with a phase capturing device.
The heating-up temperature interval of described rotary heating furnace is in room temperature to 1200 DEG C.
Described grain phase capturing device is cambridge filter, and described gas phase capturing device is collecting trap.
Described combustion products dilute case is provided with blowdown valve.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The invention solves existing analysis means and cannot accurately simulate the problem of cigarette combustion with meagre oxygen environment, can effectively simulate the Hypoxic habitats of cigarette burning by controlling equivalence ratio and temperature, and can carry out collection analysis by the HCN of the generation under specific combustion with meagre oxygen environment gathers, accurately set up the relation between result of combustion of tobacco HCN burst size and burning condition, this has significant directive significance for cigarette composition design, cigarette smoke Evaluation of Harmfulness etc.
Brief description of the drawings:
Fig. 1 is structural representation of the present invention.
Number in the figure: 1 is stable state combustion device, 2 is products of combustion conversion equipment, 3 is carboloy dioxide analysis device, 4 is stable state combustion product capturing device, 11 is supply air line, 12 is stepper motor, 13 is seal, 14 is quartz ampoule, 15 is quartz boat, 16 is tobacco sample, 17 is rotary heating furnace, 18 is annular-heating furnace controller, 31 is combustion products dilute case, 32 is the second supply air line, 33 is blowdown valve, 34 is vacuum pump, 35 is the infrared instrument of non-scattering, 41 is grain phase capturing device, 42 is gas phase capturing device.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment:
Embodiment: referring to Fig. 1, the measurement mechanism of the tobacco combustion with meagre oxygen HCN burst size of the present embodiment, it comprises:
Stable state combustion device 1, products of combustion conversion equipment 2, carboloy dioxide analysis device 3 and stable state combustion product capturing device 4; Wherein, stable state combustion device 1 comprises rotary heating furnace 17 and annular-heating furnace controller 18, one end that quartz ampoule 14 is located in rotary heating furnace is fire end, the other end is non-fire end, be provided with seal 13 at non-fire end, quartz boat 15 is located in quartz ampoule and by the adjustable stepper motor 12 of outside speed and is promoted in quartz ampoule, at the uniform velocity to move, and is provided with two through holes for supply air line path and stepper motor transmission path on seal, and supply air line 11 is communicated with outside feeder; In experimentation, promoting quartz boat by stepper motor moves to the fire end of quartz ampoule; The temperature range of described rotary heating furnace heating is in room temperature to 1200 DEG C, and its furnace chamber internal diameter is slightly larger than the external diameter of quartz ampoule, so that the gap between quartz ampoule and rotary heating furnace furnace chamber is as far as possible little; Supply air line 11 is stablized and the adjustable air-flow of flow for burner provides.
Described products of combustion conversion equipment 2 is T-valve, and it is connected with outlet side, described carboloy dioxide analysis device, the described stable state combustion product capturing device of the rotary heating furnace of stable state combustion device respectively, for the flow direction conversion of products of combustion; Carboloy dioxide analysis device 3 comprises the combustion products dilute case 31 being communicated with described T-valve, the infrared instrument 35 of non-scattering being communicated with combustion products dilute case, the vacuum pump 34 being communicated with the infrared instrument of described non-scattering, is communicated with the second supply air line 32 on described combustion products dilute case 31; Wherein, the infrared instrument of non-scattering is for detection of carbon dioxide volumetric concentration and temperature; The gas flow that described vacuum pump is used for extracting described combustion products dilute case according to certain volumetric flow rate is through the infrared instrument of non-scattering; The second supply air line 32 is connected with combustion products dilute case, for dilute combustion product, is convenient to CO
2the analysis of detector.
Described stable state combustion product trapping analytical equipment 4 comprises the gas phase capturing device 42 being communicated with by air pipe with described T-valve, and in feed channel, is provided with a phase capturing device 41.In specifically arranging, grain phase capturing device 41 is cambridge filter, and gas phase capturing device 42 is collecting trap.This set of capturing device meets standard YC/T403-2011 " the mensuration chromatography of ions of hydrogen cyanide in cigarette mainstream flue gas ".
Be ion chromatograph for the HCN proving installation of testing, correlation parameter meets standard YC/T403-2011 " the mensuration chromatography of ions of hydrogen cyanide in cigarette mainstream flue gas ".
In above-mentioned measurement mechanism, supply air line 11 comprises gas-holder and the flowmeter of stable output air-flow, and its source of the gas is synthesis of air or is pressurized air; Described synthesis of air is mixed by 21% oxygen and 79% nitrogen, and airshed is respectively by oxygen flow meter and the control of nitrogen flow meter; Described pressurized air is entering the dedusting that will dehumidify before flowmeter, described dehydrating unit is the two logical glass tubes that drying agent is housed, inlet end is connected with compressed air gas source, outlet side is connected with dust arrester, described dust arrester is two exchange devices that quartz filter paper is housed, its one end is connected with dehydrating unit outlet side, and the other end is connected with air flowmeter;
In above-mentioned measurement mechanism, the source of the gas in the second supply air line is inert gas, preferred nitrogen, helium.
In carboloy dioxide analysis device, the top of combustion products dilute case is provided with blowdown valve 33, guard box internal pressure constant; The volume range that the infrared instrument of non-scattering is analyzed carbon dioxide is not higher than 5%; The extraction flow of vacuum pump is between 0.5-2 liter/min.
When test, concrete operation step is as follows:
According to standard GB/T16447-2004 " tobacco and tobacco product regulate and the atmospheric environment of test " to tobacco sample pre-service;
Accurately weigh Wg tobacco sample 16 uniform spreadings on quartz boat 15;
The correlated results (tobacco sample advance speed and amount of supplied air) calculating according to equivalence ratio formula, sets the parameter of described measurement mechanism, after it is stable, start to measure, and the volume fraction that records carbon dioxide in products of combustion over time;
Treat that carbon dioxide volume fraction temporal evolution curve fluctuation hour, just can think and reach stable state, now, guide products of combustion into capturing device 4 by T-valve, after sampling, guide products of combustion into carboloy dioxide analysis device 3;
Grain phase and gas-phase product that capturing device 4 is gathered are processed according to standard YC/T403-2011 " the mensuration chromatography of ions of hydrogen cyanide in cigarette mainstream flue gas ", then analyze with ion chromatograph;
After being completed, closing electricity and close gas, and according to surveyed data, the burst size of HCN when the tobacco sample of unit of account quality burns under this state.
Claims (4)
1. a measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, is characterized in that comprising:
Stable state combustion device (1), products of combustion conversion equipment (2), carboloy dioxide analysis device (3) and stable state combustion product capturing device (4);
Described stable state combustion device (1) comprises rotary heating furnace (17) and annular-heating furnace controller (18), one end that quartz ampoule (14) is located in described rotary heating furnace is fire end, the other end is non-fire end, be provided with seal (13) at described non-fire end, quartz boat (15) is located in described quartz ampoule and by outside stepper motor (12) and is promoted in quartz ampoule, at the uniform velocity to move, on described seal, be provided with two through holes for supply air line path and stepper motor transmission path, described supply air line (11) is communicated with outside feeder;
Described products of combustion conversion equipment (2) is T-valve, and it is connected with outlet side, described carboloy dioxide analysis device, the described stable state combustion product capturing device of the rotary heating furnace of stable state combustion device respectively, for the flow direction conversion of products of combustion;
Described carboloy dioxide analysis device (3) comprise the combustion products dilute case (31) being communicated with described T-valve, the infrared instrument of non-scattering (35) being communicated with described combustion products dilute case, with the vacuum pump (34) that the infrared instrument of described non-scattering is communicated with, on described combustion products dilute case (31), be communicated with the second supply air line (32);
Described stable state combustion product trapping analytical equipment (4) comprises the gas phase capturing device (42) being communicated with by air pipe with described T-valve, and in described feed channel, is provided with a phase capturing device (41).
2. according to claim 1 one measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, is characterized in that, the heating-up temperature interval of described rotary heating furnace is in room temperature to 1200 DEG C.
3. according to claim 1 one measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, is characterized in that, described grain phase capturing device (41) is cambridge filter, and described gas phase capturing device (42) is collecting trap.
4. according to claim 1 one measurement mechanism that grows tobacco combustion with meagre oxygen HCN burst size, is characterized in that, described combustion products dilute case (31) is provided with blowdown valve (33).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777276A (en) * | 2015-04-29 | 2015-07-15 | 河南中烟工业有限责任公司 | Method for quickly determining release amount of hydrogen cyanide after tobacco leaves are burnt |
| CN114544883A (en) * | 2022-03-10 | 2022-05-27 | 广东中烟工业有限责任公司 | Method for evaluating content of cyanide generated after combustion of tobacco |
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Cited By (3)
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| CN104777276A (en) * | 2015-04-29 | 2015-07-15 | 河南中烟工业有限责任公司 | Method for quickly determining release amount of hydrogen cyanide after tobacco leaves are burnt |
| CN114544883A (en) * | 2022-03-10 | 2022-05-27 | 广东中烟工业有限责任公司 | Method for evaluating content of cyanide generated after combustion of tobacco |
| CN114544883B (en) * | 2022-03-10 | 2023-04-28 | 广东中烟工业有限责任公司 | Method for evaluating cyanide content generated after combustion of tobacco |
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Application publication date: 20140702 |