Device for detecting chemical components of flue gas

Abstract

The utility model discloses a device for detecting chemical components of flue gas. The device comprises a simulated smoking machine, an extraction bottle and a gas chromatograph, the simulated smoking machine comprises a closed container and a smoking assembly arranged in the closed container, and a smoke outlet is formed in the top surface of the closed container; the top of the extraction bottle is communicated with the smoke outlet through a first gas pipe, an on-off valve is arranged on the first gas pipe, and an extraction liquid outlet is formed in the upper part of the extraction bottle; and the gas chromatograph is used for analyzing the smoke components by using the extract liquor. According to the device, the smoke is directly input into the extraction bottle through the gas pipe by the simulation smoking machine, smoke components needing to be analyzed are absorbed through the extraction liquid, and then the extraction liquid is input into the gas chromatograph for analysis, so that the smoke trapping process is omitted, the process is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of flue gas detection technology, and specifically to a device for detecting the chemical composition of flue gas. Background Technology

[0002] Quantitative analysis of chemical components produced by tobacco combustion (such as carbon monoxide, nicotine, and aromatic hydrocarbons) helps differentiate tobacco quality and assists in the development of tobacco products. Current technologies typically involve capturing the smoke produced by tobacco combustion, separating the desired smoke components from the captured gas, and then analyzing these components using gas chromatography to evaluate tobacco quality based on the analytical results. However, existing smoke analysis methods are complex and have low detection efficiency. Utility Model Content

[0003] This application provides a device for detecting the chemical components of flue gas, which simulates a smoking machine directly inputting flue gas into an extraction bottle through a gas tube. The extraction liquid absorbs the flue gas components to be analyzed, and then the extraction liquid is input into a gas chromatograph for analysis. This eliminates the flue gas collection process, simplifies the process, and improves detection efficiency.

[0004] This application provides a device for detecting the chemical composition of flue gas, including a simulated smoking machine, an extraction bottle, and a gas chromatograph;

[0005] The simulated smoking machine includes a sealed container and a smoking component disposed inside the sealed container, with a smoke outlet on the top surface of the sealed container;

[0006] The top of the extraction bottle is connected to the smoke outlet through the first gas pipe, and the first gas pipe is equipped with an on / off valve. The upper part of the extraction bottle is equipped with an extract liquid outlet.

[0007] Gas chromatographs are used to analyze the components of flue gas using extracts.

[0008] Preferably, a second gas tube extending downward from the top outside is provided on the central axis of the extraction bottle, and there is a gap between the lower end of the second gas tube and the bottom surface of the inner cavity of the extraction bottle.

[0009] Preferably, the upper part of the inner cavity of the extraction bottle is provided with a plurality of perforated plates, and the perforated plates are provided with a plurality of through holes extending from top to bottom.

[0010] Preferably, the smoke outlet is sealed to the first end of the first air pipe.

[0011] Preferably, the second end of the first trachea is sealed to the upper end of the second trachea.

[0012] Preferably, the smoking assembly includes a turntable that is rotatably disposed within a sealed container and an ignition device that is fixedly disposed within the sealed container;

[0013] The turntable is provided with multiple tobacco product holders along its circumference for holding tobacco products. The ignition device is in contact with or close to the outer end of the tobacco product on one of the tobacco product holders.

[0014] Preferably, the sealed container is provided with a vent, and the vent is provided with a sealing cap.

[0015] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0017] Figure 1 A partial structural schematic diagram of the flue gas chemical composition detection device provided in this application;

[0018] Figure 2 This is a schematic diagram of the extraction flask provided in this application. Detailed Implementation

[0019] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0020] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0021] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0022] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0023] This application provides a device for detecting the chemical composition of flue gas. It simulates a smoking machine directly inputting flue gas into an extraction bottle via a gas tube. The extract absorbs the flue gas components to be analyzed, and then the extract is input into a gas chromatograph for analysis. This eliminates the flue gas collection process, simplifies the procedure, and improves detection efficiency. Furthermore, a second gas tube inside the extraction bottle guides the flue gas to the bottom of the inner cavity, allowing the flue gas to pass through the extract from bottom to top, extending the contact time between the flue gas and the extract and increasing the extraction rate. Further, multiple perforated plates are installed at the top of the extraction bottle, allowing the flue gas to move upwards through the mesh, increasing the resistance to gas movement and ensuring sufficient contact between the flue gas and the extract, further improving the extraction rate.

[0024] like Figure 1 As shown, the chemical composition detection device for flue gas provided in this application includes a simulated smoking machine 10, an extraction bottle 30, and a gas chromatograph (not shown in the figure).

[0025] The simulated smoking machine 10 includes a sealed container 11 and a smoking component 12 disposed inside the sealed container 11. The top surface of the sealed container 11 is provided with a smoke outlet.

[0026] Preferably, the sealed container 11 is provided with a vent, and the vent is provided with a sealing cap.

[0027] As one embodiment, the smoking assembly 12 includes a turntable rotatably disposed within a sealed container and an ignition device fixedly disposed within the sealed container 11. The turntable has a plurality of tobacco product holders circumferentially arranged for holding tobacco products 40. The ignition device contacts or approaches the outer end of the tobacco product on one of the tobacco product holders to ignite the tobacco product. As the turntable rotates, it causes the tobacco products on each holder to pass sequentially through the ignition device to ignite the tobacco products sequentially.

[0028] It should be noted that the ignition device is the same as that used in existing simulated cigarette machines, and this application does not impose any restrictions on it.

[0029] The top of the extraction bottle 30 is connected to the smoke outlet via a first gas pipe 20. The smoke outlet is sealed to the first end of the first gas pipe 20, and the top of the extraction bottle 30 is sealed to the second end of the first gas pipe 20. An on / off valve is provided on the first gas pipe 20 to control the amount of smoke entering the extraction bottle 30.

[0030] The inner cavity of the extraction bottle 30 contains an extractant, and the upper part of the extraction bottle has an extractant outlet 31, which is lower than the liquid level of the extractant.

[0031] Understandably, the extraction flask 30 also has the necessary components (such as venting structures) found on existing extraction devices, which will not be described in detail here.

[0032] Gas chromatography (GC) is used to analyze the components of tobacco smoke using extracts. GC can quantitatively analyze various chemical components produced by the combustion of tobacco products, offering high efficiency and resolution when analyzing complex gas mixtures generated during tobacco combustion.

[0033] Based on the above, preferably, such as Figure 2 As shown, a second gas pipe 32 extending downward from the top outer side is provided on the central axis of the extraction bottle 30. There is a gap between the lower end of the second gas pipe 32 and the bottom surface 33 of the inner cavity of the extraction bottle 30. The second end of the first gas pipe 20 is sealed to the upper end of the second gas pipe 32, so that the flue gas first reaches the bottom of the extraction bottle along the second gas pipe 32, and then moves upward, which prolongs the contact time between the flue gas and the extract liquid and improves the extraction rate.

[0034] Further, preferably, such as Figure 2 As shown, the upper part of the inner cavity of the extraction bottle 30 is provided with multiple perforated plates 34, and multiple through holes 341 extending from top to bottom are provided on the perforated plates 34, so that the flue gas moves upward through the mesh, which increases the resistance of the flue gas movement, and makes the flue gas fully contact the extraction liquid, thereby further improving the extraction rate.

[0035] When using the detection device of this application to detect the chemical composition of flue gas, the tobacco products to be tested are first clamped onto the tobacco product holders, and then the tobacco products are ignited. The quantity of tobacco products to be tested is not strictly required, but they must be placed evenly, and once the quantity of tobacco is specified, the quantity placed should be consistent in subsequent tobacco tests. During tobacco combustion, the temperature, humidity, and airflow within the simulated smoking machine are controlled within standard values.

[0036] Then, open the on / off valve to introduce the smoke from the simulated smoking machine into the extraction bottle, filter and collect the smoke. To ensure detection accuracy, the extraction collection bottle should be opened one minute after the tobacco has burned. Then, remove the sealing cap, open the vent to expel all the air from the sealed container, replace the sealing cap, open the on / off valve, and the extraction bottle will begin collecting the smoke.

[0037] Then, a quantitative amount of extract is transferred to a gas chromatograph through the extract outlet for quantitative analysis of the target chemical component. As an example, the extract stored in the extraction bottle is divided into three equal portions, each 1 L, and analyzed in the gas chromatograph. Taking a certain chemical component as an example, the content of this chemical component in each extract portion is m1, m2, and m3, respectively. The content of this chemical component in each liter of flue gas is then expressed as m = (m1 + m2 + m3) / 3.

[0038] Finally, the tobacco is graded according to the content of the target chemical components and in accordance with relevant standards.

[0039] As an example, if the content of all the tested chemical components in each liter of smoke meets the superior grade standard, the tobacco is classified as superior; if the content of all the tested chemical components in each liter of smoke meets the good grade standard, but at least one tested chemical component does not meet the superior grade standard, the tobacco is classified as good; and so on, to obtain the rating method of medium and poor.

[0040] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A device for detecting the chemical composition of flue gas, characterized in that, This includes a simulated smoking machine, extraction bottles, and a gas chromatograph; The simulated smoking machine includes a sealed container and a smoking assembly disposed within the sealed container, wherein a smoke outlet is provided on the top surface of the sealed container; The top of the extraction bottle is connected to the smoke outlet through a first gas pipe, and the first gas pipe is equipped with an on / off valve. The upper part of the extraction bottle is equipped with an extract liquid outlet. The gas chromatograph is used to analyze the components of flue gas using the extract.

2. The chemical composition detection device for flue gas according to claim 1, characterized in that, The extraction bottle has a second gas tube extending downward from the top outside on its central axis, and there is a gap between the lower end of the second gas tube and the bottom surface of the inner cavity of the extraction bottle.

3. The chemical composition detection device for flue gas according to claim 2, characterized in that, The upper part of the inner cavity of the extraction bottle is provided with a plurality of perforated plates, and the perforated plates are provided with a plurality of through holes extending from top to bottom.

4. The chemical composition detection device for flue gas according to claim 1, characterized in that, The smoke outlet is sealed to the first end of the first gas pipe.

5. The chemical composition detection device for flue gas according to claim 2, characterized in that, The second end of the first trachea is sealed to the upper end of the second trachea.

6. The chemical composition detection device for flue gas according to claim 1, characterized in that, The smoking assembly includes a turntable that is rotatably disposed within the sealed container and an ignition device that is fixedly disposed within the sealed container. The turntable is provided with a plurality of tobacco product holders along its circumference for holding tobacco products, and the ignition device is in contact with or close to the outer end of the tobacco product on one of the tobacco product holders.

7. The chemical composition detection device for flue gas according to claim 1, characterized in that, The sealed container is provided with a vent, and the vent is provided with a sealing cap.

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