Full flue gas puff-by-puff trapping system and trapping treatment method
The system enables simultaneous capture and analysis of mainstream and sidestream flue gas through a full flue gas capture system, solving the problem of insufficient analysis in existing technologies and providing a dynamic and accurate flue gas analysis tool.
Patent Information
- Application Number
- CN202511777276.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-01-23
AI Technical Summary
Existing technologies make it difficult to simultaneously capture both the mainstream and sidestream smoke of cigarettes in each puff, resulting in insufficient and inaccurate analysis of cigarette smoke.
Design a full flue gas capture system, including a fishtail hood, a side-flow flue gas capture module, and a main flow flue gas capture module. Through multiple parallel gas paths and a modular architecture, it achieves synchronous, capture-by-capture of main flow and side-flow flue gas, and is equipped with a gas phase analysis module for analysis.
It enables comprehensive, dynamic, and precise analysis of cigarette smoke, accurately revealing the dynamic release patterns of mainstream and sidestream smoke components during each puff, reducing system cost and complexity, and providing a flexible analysis tool.
Smart Images
Figure CN121384686A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of cigarette manufacturing technology, in particular to a full smoke gas per puff capturing system and a capturing and processing method. BACKGROUND
[0002] During the process of cigarette smoking, due to the difference between the internal and external environment of the cigarette, two types of smoke components, mainstream smoke and sidestream smoke, are formed. The mainstream smoke inhaled by the consumer during smoking, together with the sidestream smoke generated by the cigarette under the natural smoldering state, constitutes the environmental smoke, i.e. the full smoke system.
[0003] The mainstream smoke usually has a high temperature during the combustion process, and is directly inhaled into the oral cavity by the smoker, which directly affects the sensory quality of the cigarette and is often used as a carrier for the study of the influence of smoke chemical pyrolysis products on quality. In contrast, the sidestream smoke has a lower combustion temperature and contains less oxygen, resulting in insufficient combustion of the cigarette and relatively high content of harmful components such as carbon monoxide and nicotine.
[0004] Therefore, the sidestream smoke is more commonly used as a carrier for the evaluation of cigarette safety. Since the process of smoking a cigarette is dynamic, only by analyzing the smoke components per puff can the actual variation of the smoke be accurately revealed. Therefore, how to effectively capture the full smoke components per puff, and change the flow ratio of mainstream and sidestream smoke in real time to dynamically evaluate different types of smoke indicators, has become a difficult point in today's tobacco science and technology work.
[0005] In recent years, domestic and foreign scholars have made some progress in the field of smoke capturing devices. Wang Yan et al. invented a "cigarette mainstream and sidestream smoke collection and capture device", which realized the synchronous or independent capture of mainstream and sidestream smoke by making the mainstream smoke gas path and the sidestream smoke gas path independent of each other. Zhang Fengmei et al. improved the design by setting a negative pressure bottle on the negative pressure bottle support, and equipped it with a cigarette holder and an air flow pipe, which realized the capture of mainstream smoke per puff. At the same time, Jiang Xingyi et al. also improved the design of the inlet and outlet smoke pipes of the tubular absorption bottle, which improved the capture efficiency of sidestream smoke per puff.
[0006] Although these methods have achieved remarkable results in smoke capture, there is still a gap in the synchronous capture of mainstream and sidestream smoke per puff, and it is difficult to achieve comprehensive, dynamic and accurate analysis of cigarette smoke. Therefore, in order to achieve dynamic and accurate analysis of different types of cigarette smoke evaluation, it is particularly crucial to develop a special device that can capture full smoke per puff in real time. SUMMARY
[0007] In view of the above-mentioned deficiencies or defects in the prior art, the present invention aims to provide a cigarette smoke capture system and a capture and processing method. The capture system structure can simultaneously capture particulate matter and gaseous matter in the mainstream smoke and side smoke of cigarettes, and can analyze the gaseous matter of the captured mainstream and side smoke in each puff.
[0008] To achieve the above objectives, a first aspect of the present invention provides a full flue gas capture system, comprising: Fishtail cover, used to guide and capture sideflow smoke; The side-flow flue gas collection module includes multiple parallel side-flow flue gas collection gas paths, with the inlet ends of each gas path converging and connecting to the outlet of the fishtail hood; each side-flow flue gas collection gas path is sequentially connected in series with a side-flow flue gas front-end control valve, a side-flow flue gas filter collector, a side-flow flue gas rear-end control valve, a sampling pump, a side-flow flue gas collection bag inlet control valve, and a side-flow flue gas collection bag; A mainstream flue gas capture module, connected in parallel with the sidestream flue gas capture module, includes: The suction simulation unit includes a cigarette holder for fixing a cigarette, a suction power source for generating simulated suction power, and a three-way valve disposed between the cigarette holder and the suction power source; the three-way valve is configured to selectively connect the suction power source to the cigarette holder or the ambient atmosphere. Multiple parallel mainstream flue gas collection paths are provided, with the inlet ends of each path converging and connecting to the common end of the three-way valve. Each mainstream flue gas collection path includes a mainstream flue gas filter collector and a mainstream flue gas inlet-to-outlet switching control valve arranged sequentially. The common end of each mainstream flue gas inlet-to-outlet switching control valve is equipped with a suction power source, or the common ends of all the mainstream flue gas inlet-to-outlet switching control valves are converging and connecting to the suction port of a suction power source. The switching end of each mainstream flue gas inlet-to-outlet switching control valve is connected to a mainstream flue gas inlet-to-outlet collection bag for storing flue gas through the inlet control valve of the mainstream flue gas inlet-to-outlet collection bag. At least one gas phase analysis module includes a gas analyzer and a gas transport assembly; the gas transport assembly is configured to transport gas from the mainstream flue gas catch bag or the side flue gas catch bag to the gas analyzer for analysis.
[0009] This invention achieves simultaneous, puff-by-puff, and full-smoke capture of both mainstream and side-flow cigarette smoke through multiple mainstream and side-flow smoke capture paths, and by constructing a modular architecture including key components such as a sampling pump and a vacuum generator. This system not only accurately reveals the dynamic release patterns of mainstream and side-flow smoke components during each puff, but its modular and parallel design also provides high flexibility and configurability. Key components can be configured independently or shared according to actual needs, effectively balancing the engineering requirements of reducing system cost and complexity while ensuring accurate and comparable data. This provides an unprecedented comprehensive and dynamic analytical tool for cigarette quality evaluation and safety research.
[0010] In some embodiments, the side-flow flue gas collection module includes a particulate matter collection module and a gaseous matter collection module connected in series. The particulate matter collection module includes multiple parallel particulate matter collection branches, each of which includes a side-flow flue gas front-end control valve, a side-flow flue gas filter collector, and a side-flow flue gas rear-end control valve connected in series. The gas phase matter capture module includes multiple parallel gas phase matter capture branches, and each gas phase matter capture branch includes a side flow flue gas capture bag inlet control valve and a side flow flue gas capture bag connected in series. The particulate matter collection module and the gaseous matter collection module are connected in series via a connecting pipeline; a sampling pump is installed on the connecting pipeline.
[0011] In some embodiments, the connecting pipeline is further provided with a filter and a flow regulating valve in sequence; a filter, a flow regulating valve, and a sampling pump are connected in series in sequence.
[0012] In some embodiments, the whole flue gas capture system includes a gas phase analysis module; The gas transport assembly includes a vacuum generator and an outlet control valve installed on the outlet pipes of each of the side-flow flue gas collection bags and each of the main flow flue gas collection bags; the vacuum generator is configured to selectively transport gas from any of the bags to the gas analyzer for analysis.
[0013] In some embodiments, the inlet of the gas analyzer is connected to the outlet of all the outlet control valves, and the inlet of the vacuum generator is connected to the outlet of the gas analyzer.
[0014] In some embodiments, the three-way valve is a three-way pinch valve.
[0015] In some embodiments, the gas analyzer is a carbon monoxide analyzer.
[0016] A second aspect of the present invention provides a method for capturing and processing cigarette smoke puff by puff, the method comprising the following steps: S10, Preparation steps: Set the suction parameters and the number of suction ports, empty all side flow flue gas collection bags and mainstream flue gas collection bags, and weigh the initial mass of all side flow flue gas filter collectors and mainstream flue gas filter collectors. S20, Synchronous puff-by-puff collection step: Light the cigarette and start the suction power source and sampling pump; for the Nth puff (N=1,2,3...): By opening the Nth side-flow flue gas front-end control valve and the Nth side-flow flue gas rear-end control valve, the side-flow flue gas flows through the Nth side-flow flue gas filter collector in sequence and is then transported by the sampling pump to the Nth side-flow flue gas collection bag. By controlling the Nth mainstream flue gas outlet switching control valve, the mainstream flue gas flows through the Nth mainstream flue gas outlet collecting bag in sequence and is then sucked in by the suction power source. Then, the valve is switched to connect to the Nth mainstream flue gas outlet collecting bag and the flue gas is pushed into the bag. S30, Analysis and Calculation Steps: After the collection is completed, weigh the collected mass of all side-flow flue gas filter collectors and mainstream flue gas collection bags, and calculate the mass of particulate matter at each collection bag; and analyze the gas composition information in each side-flow flue gas collection bag and mainstream flue gas collection bag.
[0017] In step S30, the method for calculating the particulate matter mass of the side-flow flue gas is: the mass increment of the corresponding side-flow flue gas filter trap, plus the total mass increment of the fishtail hood, which is averaged over the total number of suction ports.
[0018] The cigarette smoke capture and processing method of the present invention coordinates the synchronous capture of the main and side stream smoke through precise timing control, and innovatively proposes a calculation method to distribute the mass captured by the fishtail hood to the particulate matter mass of each side stream smoke puff, which more scientifically reflects the true release amount of particulate matter in the side stream smoke, and finally obtains high-precision smoke data that can reveal dynamic laws.
[0019] In some embodiments, the specific steps of storing flue gas in the sidestream flue gas capture bag and the mainstream flue gas capture bag in the synchronous capture step include: For mainstream flue gas capture bags: During suction, the specified mainstream flue gas switching control valve is controlled to connect the corresponding mainstream flue gas filter collector to the suction power source, and the flue gas is sucked into the suction power source. During exhaust, the mainstream flue gas switching control valve is switched to connect the suction power source with the corresponding mainstream flue gas collection bag, pushing the flue gas into the bag. For side-flow flue gas collection bags: During the suction cycle of the target inlet, the corresponding front-end control valve and rear-end control valve of the side flow flue gas are opened. Keep the sampling pump running continuously, and deliver the generated side flue gas through the corresponding side flue gas filter collector to the corresponding side flue gas collection bag. After the side flow flue gas collection time for that inlet is reached, the corresponding front-end control valve and rear-end control valve for the side flow flue gas are closed.
[0020] In some embodiments, after the Nth suction is completed, a purge suction is performed; wherein, before each purge suction, the three-way valve is switched to be connected to the ambient atmosphere to draw in air, and the purge suction gas is pushed into the same mainstream flue gas collection bag.
[0021] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of one embodiment of the flue gas capture system of the present invention; Figure 2 This is a schematic diagram of one embodiment of the flue gas capture method of the present invention.
[0023] Explanation of reference numerals in the attached figures 1. Suction syringe; 2. Three-way valve; 3. Fishtail cover; 4. Ashtray; 5. Cigarette holder; 6-11. Mainstream smoke filter trap; 12-17. Mainstream smoke collection bag; 18-23. Mainstream smoke switching control valve; 24-29. Sidestream smoke front-end control valve; 30-35. Sidestream smoke filter trap; 36-41. Sidestream smoke rear-end control valve; 42. Filter; 43. Flow regulating valve; 44. Sampling pump; 45-50. Sidestream smoke collection bag; 51. Carbon monoxide analyzer; 52. Vacuum generator. Detailed Implementation
[0024] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.
[0025] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.
[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0027] The first aspect of this invention provides a full flue gas capture system, such as... Figure 1 As shown, the whole flue gas capture system includes a fishtail hood 3, a side-flow flue gas capture module, a main flow flue gas capture module, and at least one gas phase analysis module.
[0028] Fish tail 3 The fishtail cover 3 is manufactured according to the relevant provisions of standard YC / T 185-2004, and is used to guide and capture side-flow smoke. In an optional embodiment, the fishtail cover 3 includes an air inlet and an air outlet, with the air inlet being wider and the air outlet narrower. A notch is provided on the side wall of the fishtail cover 3 near the air inlet for the cigarette to enter. When the cigarette is held in the cigarette holder 5, it can enter the fishtail cover 3 through this notch. The fishtail cover 3 is placed vertically with the air inlet facing downwards and the air outlet facing upwards. An ashtray 4 can be placed below the air inlet of the fishtail cover 3 to collect the ash that falls during cigarette combustion; its area and shape should cover as much of the area where ash may fall as possible. The cigarette holder 5 is used to fix the cigarette to be tested.
[0029] Sidestream smoke puff-by-puff capture module The side-flow flue gas collection module is used to collect particulate matter and gaseous matter from the side-flow flue gas. It includes multiple parallel side-flow flue gas collection gas paths, and the inlet ends of each gas path are connected to the outlet of the fishtail cover 3. Each side-flow flue gas collection gas path is connected in series with a side-flow flue gas front-end control valve, a side-flow flue gas filter collector, a side-flow flue gas rear-end control valve, a sampling pump 44, a side-flow flue gas collection bag inlet control valve, and a side-flow flue gas collection bag.
[0030] The sideflow smoke filter trap 30~35 can be fitted with a 44mm Cambridge filter to capture particulate matter in the mainstream smoke. Since it is easy to think of eliminating the differences between samples and making the capture results closer to the true value by increasing the number of cigarettes tested, a 92mm Cambridge filter trap can also be used depending on the actual situation.
[0031] Furthermore, the side-flow flue gas collection module includes a particulate matter collection module and a gaseous matter collection module connected in series. The particulate matter collection module includes multiple parallel-connected particulate matter collection branches, each including a side-flow flue gas front-end control valve 24-29, a side-flow flue gas filter collector 30-35, and a side-flow flue gas rear-end control valve 36-41 connected in series. The gaseous matter collection module includes multiple parallel-connected gaseous matter collection branches, each including a side-flow flue gas collection bag inlet control valve and side-flow flue gas collection bags 45-50 connected in series. The particulate matter collection module and the gaseous matter collection module are connected in series via a connecting pipeline. A sampling pump 44 is installed on the connecting pipeline.
[0032] The front-end control valve for the side-flow flue gas can be a normally closed electromagnetic clamp valve to avoid direct contact between the valve core and the flue gas, which would affect the collection of particulate matter and prevent blockage. The rear-end control valve for the side-flow flue gas can be an electromagnetic three-way valve 2 to control the on / off state of the collection path.
[0033] The connecting pipeline is also equipped with a filter 42 and a flow regulating valve 43 in sequence. The filter 42, the flow regulating valve 43, and the sampling pump 44 are connected in series.
[0034] The purpose of filter 42 is to purify the side-flow flue gas to protect downstream precision components. Although most of the particulate matter in the side-flow flue gas is effectively intercepted by the fishtail hood 3 and the side-flow flue gas filter traps 30-35, extremely small particles and liquid aerosols may still penetrate or circumvent the filter. If these substances are allowed to directly enter the subsequent gas path, they may contaminate, clog, or even damage the precision valve passage of the downstream flow control valve 43 and the internal gas chamber and diaphragm of the sampling pump 44, affecting their normal operating performance and service life. In addition, if gas phase composition analysis equipment such as gas bags or analyzers are connected downstream, these residual particulate matter will cause cross-contamination and interfere with the accuracy of the analysis results.
[0035] Therefore, setting up filter 42 is equivalent to adding a safety barrier, thereby ensuring the long-term stable operation of flow regulating valve 43 and sampling pump 44, and maintaining the integrity and reliability of the data of the entire device.
[0036] In one specific embodiment of the present invention, the filter 42 is a micro-mist filter with a filtration capacity of 0.01 μm.
[0037] The purpose of the flow control valve 43 is to achieve precise and stable control of the sampling flow rate of the side-stream flue gas. In analytical chemistry, any sampling and measurement must be performed under known, constant, and repeatable conditions. For the capture of side-stream flue gas, the sampling flow rate is a crucial parameter. The sampling pump 44 itself can provide suction power and allow for approximate flow rate setting, but its output flow rate may fluctuate due to factors such as load and voltage, and fine-tuning is difficult. This is precisely the function of the flow control valve 10. Based on the flow indicator of the sampling pump 44, the operator can precisely set and stabilize the sampling flow rate of the side-stream flue gas at a specific value required by standard methods, such as 3.0 L / min, by finely adjusting this valve. If the sampling flow rate fluctuates, even if the same mass of particulate matter is captured, the flue gas concentration it represents will be different, which will lead to the incomparability of experimental data between different batches or even different numbers of samples.
[0038] In practice, each side-flow flue gas collection path can be equipped with a filter 42, a flow regulating valve 43, and a sampling pump 44. While this approach can achieve the basic functions, it suffers from the disadvantages of "high cost and high complexity." Therefore, in a preferred embodiment of the present invention, multiple parallel side-flow flue gas collection paths share a set of filters 42, flow regulating valves 43, and sampling pumps 44.
[0039] Mainstream smoke puff-by-puff capture module The mainstream flue gas collection module is connected in parallel with the side-flow flue gas collection module, and includes a suction simulation unit and multiple parallel mainstream flue gas collection gas paths.
[0040] The suction simulation unit includes a cigarette holder 5 for fixing the cigarette, a suction power source 1 for generating simulated suction power, and a three-way valve 2 disposed between the cigarette holder 5 and the suction power source 1. The three-way valve 2 is configured to selectively connect the suction power source 1 to the cigarette holder 5 or to the ambient atmosphere. Specifically, the three-way valve 2 includes three ports: port A, port B, and port C. Port A is connected to the outlet of the cigarette holder 5, port B is connected to the ambient atmosphere, and port C is connected to the inlet of the main exhaust pipe for the mainstream smoke.
[0041] The suction power source 1 includes a drive motor, a piston driven by the drive motor, and a cylinder housing the piston; the drive motor is electrically connected to a controller, which is configured to control the drive motor so that the piston moves within the cylinder according to a predetermined suction program.
[0042] Furthermore, the suction power source 1 can be a suction syringe. The suction syringe has a piston structure, with a stepper motor driving the piston to move within a circular glass tube, thereby simulating human inhalation of a cigarette. The suction syringe also includes a controller to control the movement mode of the stepper motor. Those skilled in the art can easily understand that changing the controller parameters can alter the suction mode, such as suction duration, suction cycle, suction curve, and perform volume calibration, etc., which will not be elaborated further here.
[0043] The labyrinth ring and neoprene gasket installed inside the cigarette holder 5 wrap around the cigarette butt area, serving to seal and fix it.
[0044] The inlet ends of each mainstream flue gas collection path converge and connect to the common end of the three-way valve 2. Each mainstream flue gas collection path includes a mainstream flue gas filter collector 6-11 and mainstream flue gas inlet-to-outlet switching control valves 18-23 arranged sequentially. The common end of each mainstream flue gas inlet-to-outlet switching control valve 18-23 is equipped with a suction power source 1, or the common ends of all mainstream flue gas inlet-to-outlet switching control valves 18-23 converge and connect to the suction port of a suction power source 1. The switching end of each mainstream flue gas inlet-to-outlet switching control valve 18-23 is connected to a mainstream flue gas inlet-to-outlet collection bag for storing flue gas through the inlet control valve of the mainstream flue gas inlet-to-outlet collection bag.
[0045] In some embodiments, the three-way valve 2 is an electromagnetic three-way clamp valve, with its normally closed end connected to the cigarette holder 3 and its normally open end connected to the atmospheric environment.
[0046] The mainstream smoke filter trap 6~11 can be fitted with a 44mm Cambridge filter to capture particulate matter in the mainstream smoke. Since it is easy to think of eliminating the differences between samples and making the capture results closer to the true value by increasing the number of cigarettes tested, a 92mm Cambridge filter trap can also be used depending on the actual situation.
[0047] The main flue gas switching control valves 18-23 are electromagnetic two-position three-way valves. In suction mode, they connect the suction syringe and the main flue gas filter traps 6-11. In trapping mode, they connect the suction syringe and the inlet control valve of the main flue gas trapping gas bag. Those skilled in the art can easily understand and use other gas path control components such as check valves or pinch valves to achieve the above objectives.
[0048] The mainstream flue gas collection bags 12-17 are used to store mainstream flue gas. Each mainstream flue gas collection bag includes two openings, each equipped with an inlet control valve and an outlet control valve. The purpose of designing the inlet and outlet control valves is to open and close them according to the operation flow of the gas stored in the bag. In the mainstream flue gas sampling process, the inlet control valve is opened and the outlet control valve is closed; in the carbon monoxide content analysis process, the inlet control valve is closed and the outlet control valve is opened. In this embodiment, the control valve is a solenoid two-position two-way valve, but a one-way valve, three-way valve, pinch valve, etc., can also be used.
[0049] Phase analysis module At least one phase analysis module is provided. Specifically, the phase analysis module includes a gas analyzer and a gas transport assembly. The gas transport assembly is configured to deliver gas from the main flue gas catch bag or the side-flow flue gas catch bag to the gas analyzer for analysis.
[0050] Although this device allows for the configuration of independent phase analysis modules for each mainstream flue gas collection bag 12-17 and each side-flow flue gas collection bag 45-50, in a preferred embodiment of the invention, to significantly reduce equipment costs, improve system integration, and facilitate maintenance and operation, all gas bags are connected to a single phase analysis module. This phase analysis module, through the coordinated operation of its gas transport components, such as the vacuum generator 52 and the gas bag outlet control valve, enables the vacuum generator 52 to selectively deliver gas from any gas bag to the gas analyzer for analysis, achieving sequential and accurate analysis of the flue gas within each gas bag.
[0051] Specifically, the entire flue gas out-of-port collection system has only one gas phase analysis module. That is, the side-flow flue gas out-of-port collection module and the main flow flue gas out-of-port collection module are connected in parallel and then connected in series with the gas phase analysis module. The gas transport assembly includes a vacuum generator 52 and outlet control valves installed on the outlet pipes of each of the side-flow flue gas out-of-port collection gas bags and each main flow flue gas out-of-port collection gas bag. The vacuum generator 52 is configured to selectively transport the gas from any gas bag to the gas analyzer for analysis.
[0052] The inlet of the gas analyzer is connected to the outlet of all the outlet control valves, and the inlet of the vacuum generator 52 is connected to the outlet of the gas analyzer.
[0053] When analyzing carbon monoxide in flue gas using the full flue gas capture system of the present invention, the gas analyzer selected is a carbon monoxide analyzer 51.
[0054] The vacuum generator 52 provides the power to pump the mainstream flue gas in the gas bag into the carbon monoxide analyzer 51 for analysis. In this embodiment, a vacuum generator 52 with a controllable switch and adjustable suction flow rate is used. After the carbon monoxide content in the mainstream flue gas is obtained by the carbon monoxide analyzer 51, the suction flow rate is increased to extract the remaining gas in the gas bag and make it into a vacuum state to prepare for the next test.
[0055] In some embodiments, the inlet of the gas analyzer is connected to the outlet of all gas bag outlet control valves via a pipeline, and the inlet of the vacuum generator 52 is connected to the outlet of the gas analyzer. Further, the gas analyzer is a carbon monoxide analyzer 51.
[0056] The carbon monoxide analyzer 51 is a non-scattering infrared carbon monoxide analyzer with a range of 0~6% volume concentration. Its linearity and repeatability are 1%. Those skilled in the art can easily select carbon monoxide analyzers with other ranges in other embodiments according to the actual situation of the gas, and even select multiple analyzers with different ranges for mainstream flue gas analysis.
[0057] Based on the three-way valve 2, the suction power source can be flexibly and quickly switched between cigarette smoke and ambient air. This function is key to achieving "clean suction," which can thoroughly purge residual smoke in the pipeline into the gas bag, improving the integrity and accuracy of capturing gaseous components of the mainstream smoke in each puff.
[0058] All the main intake pipes for the mainstream flue gas share a single suction power source 1. The outlet of the mainstream flue gas filter trap is connected to the first interface of the mainstream flue gas inlet-to-outlet switching control valve. The suction ports of the suction power source are all connected to the second interfaces of all the mainstream flue gas inlet-to-outlet switching control valves. Multiple mainstream flue gas inlet-to-outlet trapping gas bags are respectively connected to the third interfaces of the corresponding mainstream flue gas switching valves.
[0059] like Figure 1 As shown, taking the example of setting the main flue gas collection path and the side flue gas collection channel to six paths respectively, the implementation scheme of this application will be further introduced.
[0060] The mainstream flue gas filter trap 6, the mainstream flue gas port-to-port switching control valve 23, and the mainstream flue gas port-to-port collection bag 12 constitute the first port mainstream flue gas particulate matter and gaseous matter collection path; The mainstream flue gas filter trap 7, the mainstream flue gas port-to-port switching control valve 22, and the mainstream flue gas port-to-port collection bag 13 constitute the second mainstream flue gas particulate matter and gaseous matter collection path. The mainstream flue gas filter trap 8, the mainstream flue gas port-to-port switching control valve 21, and the mainstream flue gas port-to-port collection bag 14 constitute the third mainstream flue gas particulate matter and gaseous matter collection path. The mainstream flue gas filter trap 9, the mainstream flue gas port-to-port switching control valve 20, and the mainstream flue gas port-to-port collection bag 15 constitute the fourth mainstream flue gas particulate matter and gaseous matter collection path. The mainstream flue gas filter trap 10, the mainstream flue gas port-to-port switching control valve 19, and the mainstream flue gas port-to-port collection bag 16 constitute the fifth mainstream flue gas particulate matter and gaseous matter collection path. The mainstream flue gas filter trap 11, the mainstream flue gas port-to-port switching control valve 18, and the mainstream flue gas port-to-port collection bag 17 constitute the sixth mainstream flue gas particulate matter and gaseous matter collection path.
[0061] Similarly, the fishtail cover 3, the front-end control valves of the side-flow smoke 24~29, the side-flow smoke filter collector 30~35, the rear-end control valves of the side-flow smoke 36~41, the filter 42, the flow regulating valve 43, the sampling pump 44, and the side-flow smoke collection bags 45~50 constitute the particulate matter collection section for cigarette side-flow smoke.
[0062] The side-flow flue gas front-end control valve 24, the side-flow flue gas filter collector 30, the side-flow flue gas rear-end control valve 36, and the flue gas collection bag 45 constitute the first side-flow flue gas particulate matter and gas phase matter collection path. The side-flow flue gas front-end control valve 25, the side-flow flue gas filter collector 31, the side-flow flue gas rear-end control valve 37, and the side-flow flue gas port-by-port collection bag 46 constitute the second side-flow flue gas particulate matter and gaseous matter collection path. The side-flow flue gas front-end control valve 26, the side-flow flue gas filter collector 32, the side-flow flue gas rear-end control valve 38, and the side-flow flue gas port-by-port collection bag 47 constitute the third side-flow flue gas particulate matter and gaseous matter collection path. The side-flow flue gas front-end control valve 27, the side-flow flue gas filter collector 33, the side-flow flue gas rear-end control valve 39, and the side-flow flue gas port-by-port collection bag 48 constitute the fourth side-flow flue gas particulate matter and gaseous matter collection path. The side-flow flue gas front-end control valve 28, the side-flow flue gas filter collector 34, the side-flow flue gas rear-end control valve 40, and the side-flow flue gas port-by-port collection bag 49 constitute the fifth side-flow flue gas particulate matter and gaseous matter collection path. The side-flow flue gas front-end control valve 29, the side-flow flue gas filter collector 35, the side-flow flue gas rear-end control valve 41, and the side-flow flue gas port-by-port collection bag 50 constitute the sixth side-flow flue gas particulate matter and gaseous matter collection path.
[0063] Those skilled in the art will readily understand that to capture the smoke from more than six puffs one by one, it can be achieved by adding parallel capture paths.
[0064] The main flue gas collection bags 12-17 and the side-flow flue gas collection bags 45-50 are used to store the main and side-flow flue gas respectively. In this embodiment, each bag includes two openings, each equipped with an inlet control valve and an outlet control valve. The purpose of designing the inlet and outlet control valves is to open and close them according to the operation flow of the gas stored in the bags. During flue gas collection, the inlet control valve is opened and the outlet control valve is closed; during flue gas analysis, the inlet control valve is closed and the outlet control valve is opened. This design allows gas to be filled into the target bag only during collection and sampled only from the target bag during analysis, effectively preventing cross-contamination and confusion between flue gas samples from different numbers of bags, ensuring the independence and authenticity of the analysis results, and achieving independent and precise control over the filling and analysis of each bag.
[0065] The filter 42 is a micro-mist filter with a filtration capacity of 0.01μm, which further filters the side-flow flue gas and protects the components in the downstream gas path.
[0066] The flow regulating valve 43 is used to precisely control and regulate the suction flow rate of the side-flow flue gas. In this embodiment, a multi-turn metering needle valve is used to achieve this.
[0067] The sampling pump 44 provides the suction power for the side-flow flue gas, and an adjustable diaphragm air pump is selected as the method. The sampling pump 44 also includes a pump controller and a real-time flow indicator. The pump controller is used to control the suction flow rate of the air pump, and the suction flow rate is adjustable in the range of 0~6L / min. The real-time flow indicator monitors the actual flow rate of the side-flow flue gas in the air pipe.
[0068] As described above, by setting the diaphragm pump's suction flow rate to a value slightly higher than the predetermined suction flow rate through the pump controller, and then fine-tuning it through the real-time flow indicator and the multi-turn metering needle valve, the side-flow flue gas sampling flow rate can be adjusted to a fairly precise value.
[0069] The vacuum generator 52 provides the power to pump the main and side flow flue gas in the gas bag into the carbon monoxide analyzer 51 for analysis in turn. In this embodiment, a vacuum generator with a controllable switch and adjustable suction flow rate is used. After the carbon monoxide content in the flue gas is obtained by the carbon monoxide analyzer 51, the suction flow rate is increased to extract the remaining gas in the gas bag and make it into a vacuum state to prepare for the next test.
[0070] The carbon monoxide analyzer 51 is a non-scattering infrared carbon monoxide analyzer with a range of 0~6% volume concentration. Its linearity and repeatability are 1%. Those skilled in the art can easily select carbon monoxide analyzers with other ranges in other embodiments according to the actual situation of the gas, and even select multiple analyzers with different ranges for flue gas analysis.
[0071] This invention successfully achieves simultaneous, puff-by-puff, and full-smoke capture of both mainstream and side-flow cigarette smoke through multiple mainstream and side-flow smoke capture paths. This system not only accurately reveals the dynamic release patterns of mainstream and side-flow smoke components during each puff, but its modular and parallel path design also provides high flexibility and configurability. Key components can be configured independently or shared according to actual needs, effectively balancing the engineering requirements of reducing system cost and complexity while ensuring accurate and comparable data. This provides an unprecedented comprehensive and dynamic analytical tool for cigarette quality evaluation and safety research.
[0072] Corresponding to the above-mentioned device, the present invention also provides a method for collecting flue gas from one outlet at a time, such as... Figure 2 As shown.
[0073] Step S1: Calibrate the suction capacity, suction duration, and suction interval of the suction syringe 1, adjust the side-flow flue gas suction flow rate, and set the number of suction ports; Step S2: Weigh the initial mass of the fishtail hood 3, the main flow flue gas filter trap 6~11 and the side flow flue gas filter trap 30~35; Step S3: Empty the residual gas in the main stream smoke collection bags 12-17, install the fishtail cover 3, the main stream smoke filter collector 6-11 and the side stream smoke filter collector 30-35, prepare the cigarette sample, light the cigarette, and at the same time start the suction syringe 1 and the sampling pump 44 to collect the main and side stream smoke. Step S4: During the suction process, the main flue gas switching control valves 18-23 and the main flue gas collection bag inlet control valve are opened and closed sequentially, and the front and rear control valves of the side flue gas and the corresponding side flue gas collection bag inlet control valve are opened and closed sequentially to collect particulate matter and gaseous matter in the main and side flue gas. Step S5: If the number of suction ports reaches the set number, proceed to step 6; otherwise, proceed to step 4. Step S6: Immediately remove the cigarette butt, weigh the fishtail cover and the main and side flow flue gas filter traps respectively, open and close the main and side flow flue gas collection bag outlet control valves one by one, analyze the carbon monoxide content of the main and side flow flue gas, and obtain the carbon monoxide volume concentration. Step S7: Calculate the difference between the mass of the mainstream smoke filter traps 6-11 and the initial mass. This difference is the mass of particulate matter in the mainstream smoke captured by the cigarette sample. Divide the mass of particulate matter captured by the fishtail cover 3 by the number of puffs, and distribute the result equally to the mass difference of the sideflow smoke filter traps 30-35 to obtain the mass of particulate matter in the sideflow smoke. Step S8: Calculate the mass of carbon monoxide contained in each puff of the cigarette based on the collection capacity of the gas bags for collecting the main and side stream flue gas and the carbon monoxide volume concentration of the flue gas.
[0074] The following is a detailed description of the smoke collection process for the first puff of cigarette smoke in this embodiment.
[0075] After calibration, the suction volume of the suction syringe 1 is set to 35mL, the suction duration to 2 seconds, the suction interval to 60 seconds, the side flow flue gas suction flow rate to 3L / min, and the number of suction ports to 6. Weigh the initial mass M0 of the fishtail hood and the initial mass M of the main flue gas filter trap 6~11. Z1~Z6， The initial mass M of the side-flow flue gas filter trap 30~35 C1~C6 ; Open the outlet control valves of all air bags, close the inlet control valves, start the vacuum generator 52 to clear the residual gas in the air bags, and then close the outlet control valves of all air bags. Open the side-flow smoke front-end control valve 24 and the side-flow smoke rear-end control valve 36, switch the direction of the three-way valve 2 to the cigarette holder 5, switch the direction of the port-to-port switching control valve 23 to the mainstream smoke filter trap 6, keep the port-to-port switching control valves 18~22 isolated from the corresponding mainstream smoke filter trap, open the inlet control valve of the mainstream smoke port-to-port trapping gas bag 12, and keep the other valves closed; Install the fishtail cover 3, the main flow smoke filter trap and the side flow smoke filter trap, prepare the cigarette sample, light the cigarette, and at the same time start the suction syringe and sampling pump to collect the main flow and side flow smoke. Light the cigarette and start the suction syringe 1 to complete the first suction. When the suction syringe 1 is reset, switch the direction of the port-to-port control valve 23 to the inlet control valve of the mainstream smoke collection bag 12, and discharge the inhaled mainstream smoke into the bag. Preferably, since the existence of dead volume is unavoidable due to factors such as air pipe connection and valve core, a certain number of purges (volumes) must be performed to ensure the capture effect in order to capture the mainstream flue gas more completely.
[0076] Specifically, after the first puff, immediately switch the three-way valve 2 to connect with the ambient atmosphere, while simultaneously sealing the cigarette butt end (i.e., open ports B and C, close port A), and then perform puffing. After the puffing action is completed, close port B and / or port C, pushing the smoke into the mainstream smoke collection bag 12. Of course, the puffing and pushing actions require the cooperation of the mainstream smoke switching control valve 23 to open and close the corresponding ports as needed. Since the dead volume is calculated to be 90 mL in this embodiment, three consecutive puffs are performed, and the inhaled gas is discharged into the mainstream smoke collection bag 12.
[0077] Calculations show that the volume from the fishtail cover body to the front control valve is approximately 300mL. It takes about 6 seconds to draw this part of the gas through the side flow flue gas filter trap. Therefore, 6 seconds after the second suction starts, close the side flow flue gas front control valve 24 and the side flow flue gas rear control valve 36, open the side flow flue gas front control valve 25 and the side flow flue gas rear control valve 37, and keep the rest closed. This can effectively distinguish the side flow flue gas from one port to another.
[0078] Based on the first full flue gas capture method described above, complete all 6 suction runs.
[0079] After the catch is complete, remove the cigarette butt and weigh the fish tail cover to determine the mass as M0. ’ The masses of the main flow and side flow flue gas filter traps are M and M respectively. Z1~Z6 ’ and M C1~C6 ’ ; The outlet control valves of the main and sidestream flue gas collection bags were opened and closed sequentially. The carbon monoxide content of the main and sidestream flue gas was analyzed, and the carbon monoxide volume concentrations were obtained as C1 and C2 respectively. Z1~Z6 and C C1~C6 .
[0080] The mass of particulate matter in the first mainstream flue gas is M. Z1 ’ -M Z1 The mass of particulate matter in the first side-flow flue gas is M. C1 ’ -M C1 +(M0) ’ -M0)÷6; Based on the gas volume and concentration in the main stream gas collection bag 12 and the side stream gas collection bag 45, those skilled in the art can easily obtain the carbon monoxide content in the main stream and side stream gas of the first puff of the cigarette sample. The gas volume in the main stream gas collection bag 12 can be calculated based on the suction capacity and the total capacity of the purging suction, while the gas volume in the side stream gas collection bag 45 can be calculated based on the flow rate of the sampling pump 44 combined with the suction interval time.
[0081] To eliminate individual differences in cigarette samples and make the capture results closer to the true values, those skilled in the art can easily understand that this can be achieved by increasing the number of experimental samples and then averaging the results, which will not be elaborated here.
[0082] The main concept of this invention is to provide a simple, reliable, and easy-to-implement whole-smoke gas collection system and method. The device and method have flexible parameter configurations, allowing for the selection of different schemes for experimentation. It is suitable not only for monitoring cigarette quality but also for scientific research on cigarette components.
[0083] The cigarette smoke capture and processing method of the present invention coordinates the synchronous capture of the main and side stream smoke through precise timing control, and innovatively proposes a calculation method to distribute the mass captured by the fishtail hood to the particulate matter mass of each side stream smoke puff, which more scientifically reflects the true release amount of particulate matter in the side stream smoke, and finally obtains high-precision smoke data that can reveal dynamic laws.
[0084] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0085] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.
[0086] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.
Claims
1. A flue gas capture system, characterized in that, include: Fishtail cover (3) is used to guide and capture side-flow flue gas; The side-flow flue gas collection module includes multiple parallel side-flow flue gas collection gas paths, and the inlet ends of each gas path are connected to the outlet of the fishtail cover (3); each side-flow flue gas collection gas path is connected in series with a side-flow flue gas front-end control valve, a side-flow flue gas filter collector, a side-flow flue gas rear-end control valve, a sampling pump (44), a side-flow flue gas collection bag inlet control valve, and a side-flow flue gas collection bag; A mainstream flue gas capture module, connected in parallel with the sidestream flue gas capture module, includes: The suction simulation unit includes a cigarette holder (5) for fixing the cigarette, a suction power source (1) for generating simulated suction power, and a three-way valve (2) disposed between the cigarette holder (5) and the suction power source (1); the three-way valve (2) is configured to selectively connect the suction power source (1) to the cigarette holder (5) or the ambient atmosphere; Multiple parallel mainstream flue gas collection paths are connected to the common end of the three-way valve (2) at their inlet ends. Each mainstream flue gas collection path includes a mainstream flue gas filter collector and a mainstream flue gas port-to-port switching control valve arranged in sequence. The common end of each mainstream flue gas port-to-port switching control valve is equipped with a suction power source (1) or the common ends of all the mainstream flue gas port-to-port switching control valves are connected to the suction port of a suction power source (1). The switching end of each mainstream flue gas port-to-port switching control valve is connected to a mainstream flue gas port-to-port collection bag for storing flue gas through the inlet control valve of the mainstream flue gas port-to-port collection bag. At least one gas phase analysis module includes a gas analyzer and a gas transport assembly; the gas transport assembly is configured to transport gas from the mainstream flue gas catch bag or the side flue gas catch bag to the gas analyzer for analysis.
2. The whole flue gas capture system according to claim 1, characterized in that, The side-flow flue gas collection module includes a particulate matter collection module and a gaseous matter collection module connected in series. The particulate matter collection module includes multiple parallel particulate matter collection branches, each of which includes a side-flow flue gas front-end control valve, a side-flow flue gas filter collector, and a side-flow flue gas rear-end control valve connected in series. The gas phase matter collection module includes multiple parallel gas phase matter collection branches, and each gas phase matter collection branch includes a side flow flue gas collection bag inlet control valve and a side flow flue gas collection bag connected in series. The particulate matter collection module and the gaseous matter collection module are connected in series via a connecting pipeline; a sampling pump (44) is installed on the connecting pipeline.
3. The whole flue gas capture system according to claim 2, characterized in that, The connecting pipeline is also equipped with a filter (42) and a flow regulating valve (43) in sequence; the filter (42), the flow regulating valve (43), and the sampling pump (44) are connected in series in sequence.
4. The whole flue gas capture system according to claim 1, characterized in that, The whole flue gas capture system includes a gas phase analysis module; The gas transport assembly includes a vacuum generator (52) and an outlet control valve disposed on the outlet pipes of each of the side-flow flue gas collection bags and each of the main flow flue gas collection bags; the vacuum generator (52) is configured to selectively transport gas from any of the bags to the gas analyzer for analysis.
5. The whole flue gas capture system according to claim 4, characterized in that, The inlet of the gas analyzer is connected to the outlet of all the outlet control valves, and the inlet of the vacuum generator (23) is connected to the outlet of the gas analyzer.
6. The whole flue gas capture system according to claim 1, characterized in that, The three-way valve (2) is a three-way clamp valve.
7. The whole flue gas capture system according to claim 1, characterized in that, The gas analyzer is a carbon monoxide analyzer (22).
8. A method for collecting and processing cigarette smoke puff by puff, implemented based on the system described in any one of claims 1-7, characterized in that, The method includes the following steps: S10, Preparation steps: Set the suction parameters and the number of suction ports, empty all side flow flue gas collection bags and mainstream flue gas collection bags, and weigh the initial mass of all side flow flue gas filter collectors and mainstream flue gas filter collectors. S20, Synchronous puff-by-puff collection step: Light the cigarette, start the suction power source and sampling pump (44); For the Nth puff (N=1,2,3...): By opening the Nth side-flow flue gas front-end control valve and the Nth side-flow flue gas rear-end control valve, the side-flow flue gas flows through the Nth side-flow flue gas filter collector in sequence and is then transported by the sampling pump (44) to the Nth side-flow flue gas collection bag. By controlling the Nth mainstream flue gas outlet switching control valve, the mainstream flue gas flows through the Nth mainstream flue gas outlet collecting bag in sequence and is then sucked in by the suction power source. Then, the valve is switched to connect to the Nth mainstream flue gas outlet collecting bag and the flue gas is pushed into the bag. S30, Analysis and Calculation Steps: After the collection is completed, weigh the collected mass of all side-flow flue gas filter collectors and mainstream flue gas collection bags, and calculate the mass of particulate matter at each collection bag; and analyze the gas composition information in each side-flow flue gas collection bag and mainstream flue gas collection bag. In step S30, the method for calculating the particulate matter mass of the side-flow flue gas is: the mass increment of the corresponding side-flow flue gas filter trap, plus the total mass increment of the fishtail cover (3) averaged out by the total number of suction ports.
9. The method for collecting and processing cigarette smoke puff by puff according to claim 8, characterized in that, In the synchronous flue gas collection step, the specific steps of storing the flue gas in the sidestream flue gas collection bag and the mainstream flue gas collection bag include: For mainstream flue gas capture bags: During suction, the specified mainstream flue gas switching control valve is controlled to connect the corresponding mainstream flue gas filter collector to the suction power source (1), and the flue gas is sucked into the suction power source (1). During exhaust, the mainstream flue gas switching control valve is switched to connect the suction power source (1) with the corresponding mainstream flue gas collection bag, and the flue gas is pushed into the bag. For side-flow flue gas collection bags: During the suction cycle of the target inlet, the corresponding front-end control valve and rear-end control valve of the side flow flue gas are opened. Keep the sampling pump (44) running continuously, and transport the generated side flue gas through the corresponding side flue gas filter collector to the corresponding side flue gas collection bag; After the side flow flue gas collection time for that inlet is reached, the corresponding front-end control valve and rear-end control valve for the side flow flue gas are closed.
10. The method for collecting and processing cigarette smoke puff by puff according to claim 8, characterized in that, In step S20, after the Nth suction is completed, a clearing suction is performed; wherein, before each clearing suction, the three-way valve (2) is switched to be connected to the ambient atmosphere to draw in air, and the gas drawn in for clearing is pushed into the same mainstream flue gas collection bag.