Flue gas capturing device and flue gas capturing method

Abstract

The present application relates to a flue gas trapping device and a flue gas trapping method. The flue gas trapping device comprises a trap, the trap comprising a trapping cavity, a flue gas inlet, an absorbent liquid inlet and a condensing member, the flue gas inlet being in communication with the trapping cavity to facilitate the entry of external flue gas into the trapping cavity, the absorbent liquid inlet being in communication with the trapping cavity to facilitate the addition of absorbent liquid into the trapping cavity, and the condensing member being housed in the trapping cavity to reduce the temperature of the flue gas and the absorbent liquid in the trapping cavity. The flue gas trapping method comprises a condensing step, an air extraction step, a trapping step and a refluxing step. The present application can reduce the temperature of the flue gas and the absorbent liquid in the trapping cavity, promote the absorption of low-boiling substances in the flue gas, and improve the trapping effect.

Description

TECHNICAL FIELD

[0001] The present application relates to flue gas capture, more particularly, to a cigarette flue gas capture device and a flue gas capture method. BACKGROUND

[0002] The flue gas generated by the burning of cigarettes can affect human health. Research and detection analysis of the composition of the flue gas generated by cigarettes can help to ensure the safety of cigarette products and improve human health. Research and detection analysis of the flue gas generated by cigarettes requires the capture of flue gas. The existing flue gas capture scheme has poor capture efficiency, and an improved scheme is urgently needed. SUMMARY

[0003] The purpose of the present application is to improve the capture efficiency of flue gas.

[0004] To this end, the present application provides a flue gas capture device, the capture device comprising a capture cavity, a flue gas inlet, an absorption liquid inlet and a condensing member, the flue gas inlet being in communication with the capture cavity to facilitate the entry of external flue gas into the capture cavity, the absorption liquid inlet being in communication with the capture cavity to facilitate the addition of absorption liquid to the capture cavity, and the condensing member being housed in the capture cavity for reducing the temperature of the flue gas and absorption liquid in the capture cavity.

[0005] In an embodiment of the present application, the condensing member has a condensing pipeline with condensing liquid therein; the condensing member has fins to increase the condensing area or the condensing member forms a spiral-shaped bent pipe.

[0006] In an embodiment of the present application, an external condensing cavity is formed between the inner wall and the outer wall; the condensing member has a condensing pipeline in communication with the external condensing cavity.

[0007] In an embodiment of the present application, the opening and closing of the flue gas inlet is controlled by a first valve, and the opening and closing of the absorption liquid inlet is controlled by a second valve; the flue gas capture device further comprises a liquid reservoir, the liquid reservoir having a liquid inlet and a liquid outlet, the liquid inlet being used to add absorption liquid to the liquid reservoir, the opening and closing of the liquid inlet being controlled by a third valve, and the liquid outlet being in communication with the absorption liquid inlet through the second valve.

[0008] In one embodiment of the present application, the smoke capturing device further comprises a suction device and a driver; the suction device comprises a piston installed in the capturing device and reciprocable between a first position and a second position in the capturing device to change the volume of the capturing cavity; the driver drives the piston to perform a suction stroke, a capturing stroke and a return stroke; in the suction stroke, the first valve is opened and the second valve is closed, the piston moves from the first position to the second position, and the smoke enters the capturing cavity from the smoke inlet; in the capturing stroke, the first valve is closed, the second valve is opened and the third valve is closed, the piston remains in the second position, and the absorbing liquid enters the capturing cavity from the liquid reservoir; in the return stroke, the first valve is closed, the second valve is opened and the third valve is opened, and the piston returns from the second position to the first position.

[0009] In one embodiment of the present application, a smoke input device is further included, and an output port of the smoke input device is communicated to the smoke inlet of the capturing device through the first valve, for heating or burning the cigarette to input smoke into the capturing device in the suction stroke.

[0010] In one embodiment of the present application, the capturing device further has an absorbing liquid discharge port communicated to the capturing cavity, for discharging the absorbing liquid in the capturing cavity.

[0011] In one embodiment of the present application, a controller is further included, for controlling the suction stroke, the capturing stroke and the return stroke of the piston, and automatically controlling the opening and closing of the first valve, the second valve and the third valve.

[0012] The second aspect of the present application provides a smoke capturing method, comprising: a condensing step of making a condensing member in a capturing cavity of a capturing device have flowing condensing liquid; a suction step of expanding the volume of the capturing cavity to make smoke enter the capturing cavity from a smoke inlet of the capturing device; a capturing step of closing the smoke inlet of the capturing device to make absorbing liquid enter the capturing cavity from a liquid reservoir via an absorbing liquid inlet of the capturing device; and a return step of closing the smoke inlet of the capturing device to restore the volume of the capturing cavity.

[0013] In one embodiment of the present application, the capturing device has an inner wall and an outer wall, and an external condensing cavity is formed between the inner wall and the outer wall; in the condensing step, the condensing liquid circulates in the external condensing cavity and the condensing member.

[0014] The present application can reduce the temperature of the smoke and the absorbing liquid in the capturing cavity, promote the absorption of low-boiling-point substances in the smoke, and improve the capturing effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of a flue gas trapping device provided by an embodiment of the present application;

[0016] Figure 2 is a partial schematic diagram of the flue gas trapping device shown in Figure 1

[0017] Figure 3 is a flowchart of a flue gas trapping method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0018] Embodiments of the present application will be further described below with reference to the accompanying drawings.

[0019] As shown in Figure 1 and Figure 2 An embodiment of the present application provides a flue gas trapping device 100, which includes a trap 10, a condensing member 20, a liquid reservoir 30, a suction device 40 and a driver 50.

[0020] The trap 10 has a trapping cavity 17, a flue gas inlet 12 and an absorbent liquid inlet 14, which are in communication with the trapping cavity 17. The opening and closing of the flue gas inlet 12 are controlled by a first valve 13, and the opening and closing of the absorbent liquid inlet 14 are controlled by a second valve 15. That is, when the first valve 13 is opened, the flue gas inlet 12 is opened to facilitate the external flue gas to enter the trapping cavity 17, and when the first valve 13 is closed, the flue gas inlet 12 is closed. When the second valve 15 is opened, the absorbent liquid inlet 14 is opened to facilitate the addition of the absorbent liquid to the trapping cavity 17, and when the second valve 15 is closed, the absorbent liquid inlet 14 is closed.

[0021] The condensing member 20 is accommodated in the trapping cavity 17, and is used to reduce the temperature of the flue gas and the absorbent liquid in the trapping cavity 17. The condensing member 20 has a condensing pipeline, which has a condensing liquid therein. The inlet 22 and the outlet 23 of the condensing pipeline extend out of the trapping cavity 17 to facilitate the communication with the outside. In this embodiment, the condensing member 20 forms a spiral-shaped bent pipe (also referred to as a serpentine pipeline). In an alternative solution, the condensing member 20 has fins to increase the condensing area. The condensing member 20 can reduce the temperature of the flue gas and the absorbent liquid in the trapping cavity 17, promote the absorption of the low-boiling-point substances in the flue gas, and improve the trapping effect. Preferably, the temperature of the condensing liquid in the condensing member 20 is from -100 degrees Celsius to 0 degrees Celsius, and more preferably from -80 degrees Celsius to -70 degrees Celsius.

[0022] ​In this embodiment, the trap 10 has an inner wall and an outer wall, between which outer condensation cavities 25 and 27 are formed, and the condensation pipeline of the condensation member 20 communicates with the outer condensation cavities 25 and 27. The outer condensation cavities 25 and 27 can further improve the condensation effect, reduce the temperature of the flue gas and the absorption liquid in the trapping cavity 17, and promote the absorption of low-boiling-point substances in the flue gas. Preferably, the condensation pipeline of the condensation member 20 is connected in series between the outer condensation cavities 25 and 27, the inlet 26 of the outer condensation cavity 25 communicates with the inlet 22 of the condensation pipeline, and the outlet 23 of the condensation pipeline communicates with the outlet 28 of the outer condensation cavity 27. The liquid reservoir 30 has a liquid inlet 32 and a liquid outlet 34. The liquid inlet 32 is used to add the absorption liquid to the liquid reservoir 30, and the liquid outlet 34 communicates with the absorption liquid inlet 14 through the second valve 15. The opening and closing of the liquid inlet 32 are controlled by the third valve (not shown), that is, the liquid inlet 32 is opened when the third valve is opened, and the liquid inlet 32 is closed when the third valve is closed. Figure 1 The third valve is not shown.

[0023] The suction device 40 includes a piston 42 and a lead screw 43. The piston 42 is installed in the trap 10 and can reciprocate between a first position Al and a second position A2 in the trap 10, so as to change the volume of the trapping cavity 17. The lead screw 43 is connected to the piston 42 to drive the piston 42. Figure 1 In this embodiment, in order to conveniently show the position and space of the trapping cavity 17, the first position Al (also called the initial position) of the piston has a preset distance from the flue gas inlet 12 end of the trap 10, that is, when the piston is located at the first position Al, the trapping cavity 17 has a certain initial volume. It can be understood that, according to needs, the first position Al of the piston can be closer to the flue gas inlet 12 end of the trap 10, so as to reduce the initial volume of the trapping cavity 17; or even, the first position Al of the piston can abut against the flue gas inlet 12 end of the trap 10, so that the initial volume of the trapping cavity 17 is as small as possible or 0.

[0024] The driver 50 drives the piston 42 to perform a suction stroke, a trapping stroke and a return stroke through the lead screw 43. In the suction stroke, the first valve 13 is opened and the second valve 15 is closed, the piston 42 moves from the first position Al to the second position A2 as shown, the volume of the trapping cavity 17 is increased, and thus the pressure in the trapping cavity 17 is reduced, so that the flue gas enters the trapping cavity 17 of the trap 10 from the flue gas inlet 12. At this time, the trapping cavity 17 is filled with the mixture of the flue gas and the air, or completely filled with the absorption liquid. Figure 1

[0025] ​During the trapping process, the piston 42 is kept at the second position A2, the first valve 12 is closed, the second valve 15 is opened and the third valve is closed, so that the absorbent liquid flows from the reservoir 30 into the trapping chamber 17. Understandably, because the first valve 12 and the third valve are closed, the trap 10 and the reservoir 30 together form a closed space. During the process of the absorbent liquid flowing from the reservoir 30 into the trapping chamber 17, a part of the gas in the trapping chamber 17 flows into the reservoir 30, and the gas in the trapping chamber 17 is in sufficient contact with the absorbent liquid during the process so that the flue gas is trapped by the absorbent liquid, and the gas flowing into the reservoir 30 is mainly air or gas that cannot be absorbed by the absorbent liquid. Preferably, the reservoir 30 is located above the trap 10 or the position of the reservoir 30 relative to the trap 10 can be changed, so that the absorbent liquid in the reservoir 30 can flow into the trap 10 under the action of gravity during the trapping process; the absorbent liquid in the reservoir 30 preferably flows into the trapping chamber 17 completely, and the trapping chamber 17 is in a gas-liquid coexistence state or is completely filled with the absorbent liquid. Understandably, the gas in the gas-liquid coexistence state is mainly air or gas that cannot be absorbed by the absorbent liquid.

[0026] As shown above, during the trapping process, the trapping effect is improved by the condensing member 20, and the temperature of the condensing liquid in the condensing member 20 is minus 100 degrees Celsius to 0 degrees Celsius, and more preferably minus 80 degrees Celsius to minus 70 degrees Celsius.

[0027] During the backflow process, the first valve 13 is kept closed, the second valve is kept opened, and the third valve is opened to make the reservoir 30 communicate with the outside, and the piston 42 is restored from the second position A2 to the first position Al, so that the volume of the trapping chamber 17 is reduced until it is restored to the original state. Understandably, if the trapping chamber 17 is filled with the absorbent liquid when the trapping process is completed, the absorbent liquid in the trapping chamber 17 is backflowed to the reservoir 30 during the backflow process; if the trapping chamber 17 is in a gas-liquid coexistence state when the trapping process is completed, the gas in the trapping chamber 17 enters the reservoir 30 first, and then the absorbent liquid in the trapping chamber 17 is backflowed to the reservoir 30 during the backflow process. In this way, the whole process of air extraction, trapping and resetting is completed.

[0028] Preferably, the trap 10 further has an absorbent liquid discharge port 18 communicating with the trapping chamber 17, and the absorbent liquid discharge port 18 is used to discharge the absorbent liquid in the trapping chamber 17. In an alternative scheme, if the initial volume of the trapping chamber 17 is 0, most of the absorbent liquid (or the gas and the absorbent liquid) in the trapping chamber 17 is backflowed to the reservoir 30 during the backflow process, and at this time, the absorbent liquid discharge port 18 can not be provided.

[0029] In this embodiment, the smoke capturing device 100 further comprises a smoke inputter 60, the output port of the smoke inputter 60 is connected to the smoke inlet 12 of the capturing device 10 through the first valve 13, for heating or burning the cigarette 61 to input smoke into the capturing device 10 in the suction stroke.

[0030] In order to improve the accuracy of capturing, the capturing device 10 is provided with a first limiting part (not shown) for limiting the maximum stroke of the piston 42 away from the second position A2 to the first position A1. In this way, it is ensured that the volume of the capturing cavity 17 is the same when the piston 42 is in the initial position (the first position A1). Figure 1

[0031] It can be understood that, Figure 1 The smoke capturing device 100 shown can further comprise a controller for controlling the suction stroke, the capturing stroke and the backflow stroke of the piston 42, and automatically controlling the opening and closing of the first valve 13, the second valve 15 and the third valve, etc., so as to realize automatic capturing.

[0032] As Figure 3 The smoke capturing method of the smoke capturing device based on Figure 1 includes the following steps:

[0033] The condensing step S11: the condensing part in the capturing cavity of the capturing device has flowing condensate;

[0034] The suction step S13: the volume of the capturing cavity is expanded to make the smoke enter the capturing cavity from the smoke inlet of the capturing device;

[0035] The capturing step S15: the smoke inlet of the capturing device is closed, and the absorbing liquid enters the capturing cavity from the absorbing liquid inlet of the capturing device through the liquid reservoir; and

[0036] The backflow step S17: the smoke inlet of the capturing device is closed, and the volume of the capturing cavity is restored to the original state.

[0037] It can be understood that, before the condensing step S11 or the suction step S13, a liquid injection step can also be included: a predetermined amount of absorbing liquid is added to the liquid reservoir through the liquid injection port of the liquid reservoir, and then the liquid injection port is closed; correspondingly, after the capturing step S15 and before the backflow step S17, the liquid injection port of the liquid reservoir should be opened, so that the capturing cavity can be connected to the outside through the liquid reservoir.

[0038] As described above, in the capturing step S15, the capturing device and the liquid reservoir form a closed space together. During the process of the absorbing liquid entering the capturing cavity 17 from the liquid reservoir, a part of the gas in the capturing cavity will enter the liquid reservoir, and the absorbing liquid will be fully contacted with the gas in this process so that the smoke is captured and absorbed by the absorbing liquid. The gas entering the liquid reservoir is mainly air or gas that cannot be absorbed by the absorbing liquid.​

[0039] It can be understood that the suction step S13, the trapping step S15 and the backflow step S17 are a relatively complete trapping process, which can be repeated twice or more times, in which case the absorption liquid will trap the flue gas entering the trapping cavity in the two or more times of suction step S13. In the case of repeating the trapping process twice or more times, the backflow step S17 should close the liquid inlet of the reservoir after the piston returns to the first position, so as to facilitate the subsequent execution of the suction step S13.

[0040] It can be understood that the suction stroke, the trapping stroke and the backflow stroke of the piston 42, as well as the opening and closing of the first valve 13, the second valve 15 and the third valve can be automatically controlled by the controller, so as to automatically execute the liquid injection step, the condensation step S11, the suction step S13, the trapping step S15 and the backflow step S17; even automatically execute the trapping process composed of the suction step S13, the trapping step S15 and the backflow step S17 twice or more times.

[0041] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A flue gas capture device comprising a trap, characterised in that, The trap comprises a trapping chamber, a flue gas inlet, an absorbent liquid inlet and a condensing member, the flue gas inlet is communicated with the trapping chamber to facilitate the external flue gas entering the trapping chamber, the absorbent liquid inlet is communicated with the trapping chamber to facilitate the absorbent liquid being added into the trapping chamber, and the condensing member is accommodated in the trapping chamber to reduce the temperature of the flue gas and the absorbent liquid in the trapping chamber; The condensing member has a condensing pipeline with condensing liquid therein, and the condensing member has fins to increase the condensing area or the condensing member forms a spiral bent pipe; The trap has an inner wall and an outer wall, and an external condensing chamber is formed between the inner wall and the outer wall, and the condensing member has a condensing pipeline communicated with the external condensing chamber; The opening and closing of the flue gas inlet is controlled by a first valve, and the opening and closing of the absorbent liquid inlet is controlled by a second valve; the flue gas trapping device further comprises a liquid reservoir, the liquid reservoir has a liquid inlet and a liquid outlet, the liquid inlet is used for adding the absorbent liquid into the liquid reservoir, the opening and closing of the liquid inlet is controlled by a third valve, and the liquid outlet is communicated with the absorbent liquid inlet through the second valve; The flue gas trapping device further comprises a suction device and a driver; the suction device comprises a piston, the piston is installed in the trap and can reciprocate between a first position and a second position in the trap to change the volume of the trapping chamber; the driver drives the piston to perform a suction stroke, a trapping stroke and a return stroke; In the suction stroke, the first valve is opened and the second valve is closed, the piston moves from the first position to the second position, and the flue gas enters the trapping chamber from the flue gas inlet; in the trapping stroke, the first valve is closed, the second valve is opened and the third valve is closed, the piston remains in the second position, and the absorbent liquid enters the trapping chamber from the liquid reservoir; in the return stroke, the first valve is closed, the second valve is opened and the third valve is opened, and the piston returns from the second position to the first position; The flue gas trapping device further comprises a flue gas input device, and an output port of the flue gas input device is communicated with the flue gas inlet of the trap through the first valve, which is used for heating or burning the cigarette to input the flue gas into the trap in the suction stroke.

2. The flue gas capture device of claim 1, wherein, The trap further has an absorbent liquid discharge port communicated with the trapping chamber, which is used for discharging the absorbent liquid in the trapping chamber.

3. The flue gas capture device of claim 1, wherein, A controller is further included, which is used for controlling the suction stroke, the trapping stroke and the return stroke of the piston, and automatically controlling the opening and closing of the first valve, the second valve and the third valve.

4. A flue gas capturing method applied to the flue gas capturing device of claim 1, characterized in that, The method comprises: a condensing step: the condensing member in the trapping chamber of the trap has flowing condensing liquid; a suction step: the volume of the trapping chamber is expanded to make the flue gas enter the trapping chamber from the flue gas inlet of the trap; a trapping step: the flue gas inlet of the trap is closed, and the absorbent liquid enters the trapping chamber from the liquid reservoir through the absorbent liquid inlet of the trap; a return step: the flue gas inlet of the trap is closed, and the volume of the trapping chamber is restored to the original state. The trap has an inner wall and an outer wall, between which an outer condensation chamber is formed; in the condensation step, the condensate circulates in the outer condensation chamber and in the condensation element.

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