CN115452925A - An integrated structure for atmospheric organic aerosol collection and thermal desorption - Google Patents

Abstract

The disclosure of the invention belongs to the technical field of atmospheric aerosol treatment, and specifically relates to an integrated structure of atmospheric organic aerosol collection and thermal desorption, including a mounting frame, an aerosol power component placed in a collection chamber, and a thermal desorption component including a thermal desorption component. The far-infrared desorption tube in the desorption chamber, the input port of the far-infrared desorption tube is connected to the output port of the second delivery pump through a connecting pipe, the output port of the far-infrared desorption tube is connected to a collection pipe, and the other port of the collection pipe is connected to the second delivery pump through the input pipe. The third input pump is connected, and the aerosol is transported to the thermal desorption chamber through the aerosol power part for thermal desorption operation, and then the aerosol after thermal desorption is transported to the detection cycle part through the collection pipe and the third input pump. The meteorological mass spectrometer detects the aerosol after thermal desorption. If the detection is unqualified, the fourth delivery pump will supply energy to transport the unqualified aerosol to the collection chamber again, and cooperate with the far-infrared desorption tube for circulation. Desorption operation, increase the desorption effect.

Description

An integrated structure for atmospheric organic aerosol collection and thermal desorption

technical field

The invention relates to the technical field of atmospheric aerosol treatment, in particular to an integrated structure of atmospheric organic aerosol collection and thermal desorption.

Background technique

Ground-level ozone is produced by complex photochemical reactions of volatile organic gases catalyzed by nitrogen oxides under light conditions. The key difficulty in in-depth analysis of the photochemical process of ozone and organic matter, and the formation mechanism of secondary organic aerosols is the qualitative identification and quantitative analysis of the chemical components and evolution of atmospheric organic aerosols.

Atmospheric organic aerosols have extremely complex chemical components and are oxidized quickly in the atmosphere. When collecting and desorbing atmospheric aerosols, most existing designs use heated sample collectors for thermal desorption, and the collectors are not heated uniformly. It is easy to lead to low efficiency of thermal desorption, thereby affecting the efficiency of sample analysis, and generally, it is directly completed in one desorption, and the desorption effect is poor.

Contents of the invention

The purpose of this section is to outline some aspects of embodiments of the invention and to briefly describe some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and titles of this application, to avoid obscuring the purpose of this section, the abstract and titles, and such simplifications or omissions should not be used to limit the scope of the invention.

Therefore, the object of the present invention is to provide an integrated structure of atmospheric organic aerosol collection and thermal desorption, the aerosol is transported to the thermal desorption chamber through the aerosol power unit for thermal desorption operation, and then the gas after thermal desorption The aerosol is transported to the detection cycle part through the collection pipe and the third input pump. The meteorological mass spectrometer detects the aerosol after thermal desorption. Transport it to the collection chamber again, and cooperate with the far-infrared desorption tube to perform cyclic desorption operation to increase the desorption effect.

In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

An integrated structure for atmospheric organic aerosol collection and thermal desorption, which includes:

The mounting frame is symmetrically connected with a collection chamber and a thermal desorption chamber inside;

The aerosol power component is placed in the collection chamber and connected to the external control end, including a first delivery pump installed on the inner bottom of the collection chamber, and the input end of the first delivery pump is connected to the outside through the intake pipe;

A second delivery pump is installed on the inner top of the collection chamber, and the output end of the second delivery pump communicates with the thermal desorption chamber through a connecting pipe;

The thermal desorption component is connected to the external control terminal, including the far-infrared desorption tube placed in the thermal desorption chamber, and the input port of the far-infrared desorption tube is connected to the output port of the second delivery pump through a connecting tube;

The output port of the far-infrared desorption tube is connected to a collection pipe, and the other port of the collection pipe is connected to the third input pump through the input pipe, and the third input pump is placed on the top of the thermal desorption chamber.

As a preferred scheme of the integrated structure of atmospheric organic aerosol collection and thermal desorption described in the present invention, wherein: the inner side of the thermal desorption chamber is connected with a support for the far-infrared desorption tube, and the support A tube slot adapted to the far-infrared desorption tube is opened on the top.

As a preferred solution of the integrated structure of atmospheric organic aerosol collection and thermal desorption described in the present invention, wherein: the gas flow meter is connected to the outer side of the air inlet pipe corresponding to the inlet port, and a gas flow meter is arranged in cooperation with the gas flow meter The electromagnetic valve;

Both the gas flow meter and the solenoid valve are connected to the external control terminal.

As a preferred solution of the integrated structure of atmospheric organic aerosol collection and thermal desorption according to the present invention, wherein: the outer side of the input pipe is communicated with a discharge pipe, and the discharge pipe is equipped with a device for opening and closing the input pipe. controlled control valve.

As a preferred solution of the integrated structure of atmospheric organic aerosol collection and thermal desorption according to the present invention, wherein: the top of the installation frame is provided with a detection cycle component for detecting the aerosol after thermal desorption.

As a preferred solution of the integrated structure of atmospheric organic aerosol collection and thermal desorption according to the present invention, wherein: the detection cycle component includes a meteorological mass spectrometer installed on the top of the installation frame.

As a preferred scheme of the integrated structure of atmospheric organic aerosol collection and thermal desorption according to the present invention, wherein: the detection cycle part also includes a fourth delivery pump connected to the top of the meteorological mass spectrometer, the fourth delivery pump The input end communicates with the discharge port of the meteorological mass spectrometer through a connecting pipe, and the output end communicates with the collection chamber through a gas delivery pipe.

As a preferred solution of the integrated structure of atmospheric organic aerosol collection and thermal desorption according to the present invention, wherein: the tail end of the air intake pipe is clamped with a filter plate.

Compared with the existing technology: the first delivery pump provides suction, and the atmospheric gas is transported to the collection chamber through the intake pipe, and then the second delivery pump works to make a turning point, and is transported to the thermal desorption chamber for thermal desorption operation. The desorption tube performs far-infrared thermal desorption operation on the aerosol entering the tube. The aerosol is heated evenly, and then the aerosol after thermal desorption is transported to the detection cycle part through the collection tube and the third input pump. The meteorological mass spectrometer Detect the aerosols after thermal desorption. If the detection is unqualified, the fourth delivery pump will supply energy to transport the unqualified aerosols to the collection chamber again, and cooperate with the far-infrared desorption tube to perform cyclic desorption operation. , to increase the desorption effect.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Technical personnel can also obtain other drawings based on these drawings without paying creative labor. in:

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a schematic view of the top view structure of the present invention;

Fig. 3 is a schematic diagram of the explosion structure of the present invention;

Fig. 4 is a schematic structural diagram of part of Fig. 3 of the present invention;

Fig. 5 is a schematic diagram of part of the structure of the present invention;

Fig. 6 is a schematic structural diagram of an aerosol power component of the present invention.

In the figure: 100 installation frame, 110 collection chamber, 120 thermal desorption chamber, 121 support frame, 200 aerosol power part, 210 first delivery pump, 211 intake pipe, 211a filter plate, 211b gas flow meter, 211c electromagnetic Valve, 220 second delivery pump, 300 thermal desorption component, 310 far infrared thermal desorption tube, 320 collection tube, 330 third delivery pump, 331 input tube, 332 output tube, 340 discharge tube, 341 control valve, 400 detection Circulation components, 410 meteorological mass spectrometer, 420 the fourth delivery pump, 421 air delivery pipe.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. Similarly generalized, the present invention is therefore not limited by the specific embodiments disclosed below.

Secondly, the present invention is described in detail in conjunction with schematic diagrams. When describing the implementation of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

The present invention provides an integrated structure of atmospheric organic aerosol collection and thermal desorption, please refer to Figures 1-6, including a mounting frame 100, an aerosol power component 200, a thermal desorption component 300 and a detection cycle component 400;

Please continue to refer to Fig. 1, the inside of the installation frame 100 is symmetrically connected with a collection chamber 110 and a thermal desorption chamber 120, the collection chamber 110 is used as an atmospheric aerosol collection chamber, and the thermal desorption chamber 120 is used as an aerosol thermal desorption chamber ;

The inner side of the thermal desorption chamber 120 is connected with a support frame 121 supporting the far-infrared desorption tube 310, and the support frame 121 is provided with a tube groove adapted to the far-infrared desorption tube 310;

The gas flowmeter 211b is connected to the outside of the inlet pipe 211 corresponding to the inlet port, and a solenoid valve 211c is arranged in cooperation with the gas flowmeter 211b. The gas flowmeter 211b is used for real-time monitoring of the gas flow through the inlet pipe 211, and then controlled by the solenoid valve 211c. The opening and closing state of the intake pipe 211 controls the gas flow input into the collection chamber 110;

The gas flow meter 211b and the solenoid valve 211c are both connected to the external control end, and the rear end of the intake pipe 210 is clamped with a filter plate 211a, and the filter plate 211a is used to assist in filtering the input gas;

Please continue to refer to FIG. 2, FIG. 3, FIG. 4 and FIG. 6, the aerosol power component 200 is placed in the collection chamber 110, connected to the external control terminal, including the first delivery pump 210 installed at the bottom of the inside of the collection chamber 110, The input end of the first delivery pump 210 is connected to the outside through the intake pipe 211. The first delivery pump 210 provides suction to transport the atmospheric gas into the collection chamber 110 through the intake pipe 211, and then the second delivery pump 220 works to make a turning point. Transport to thermal desorption chamber 120 for thermal desorption operation;

A second delivery pump 220 is installed on the top of the inside of the collection chamber 110, and the output end of the second delivery pump 220 communicates with the thermal desorption chamber 120 through a connecting pipe;

Please continue to refer to Fig. 2, Fig. 3 and Fig. 5, the thermal desorption component 300 is connected with the external control end, comprises the far-infrared desorption tube 310 placed in the thermal desorption chamber 120, and the far-infrared desorption tube 310 input port is connected The tube is connected to the output port of the second delivery pump 220, and the far-infrared desorption tube 310 performs far-infrared thermal desorption operation on the aerosol entering the tube, and then the aerosol after thermal desorption is passed through the collection tube 320 and the third input pump. 330 is transported to the detection cycle part 400 for detection;

Far-infrared desorption pipe 310 output port is communicated and is provided with collection pipe 320, and the other port of collection pipe 320 is connected with the 3rd input pump 330 by input pipe 331, and the 3rd input pump 330 is placed on thermal desorption chamber 120 tops;

The outside of the input pipe 331 is communicated with a discharge pipe 340, and a control valve 341 for controlling the opening and closing state of the input pipe 331 is installed on the discharge pipe 340. After the meteorological mass spectrometer 410 is detected to be qualified, the flow of the input pipe 331 is controlled by the control valve 341. In the open and closed state, the qualified aerosol is output to the collection end through the discharge pipe 340;

Please continue to refer to Fig. 1, Fig. 3, Fig. 4 and Fig. 5, the detection cycle part 400 includes the meteorological mass spectrometer 410 installed on the top of the installation frame 100, and also includes the fourth delivery pump 420 connected to the top of the meteorological mass spectrometer 410, the fourth The input end of the delivery pump 420 is connected to the discharge port of the meteorological mass spectrometer 410 through a connecting pipe, and the output end is connected to the collection chamber 110 through a gas delivery pipe 421. The meteorological mass spectrometer 410 detects the aerosol after thermal desorption. If it is qualified, the fourth delivery pump 420 is used to supply energy, and the unqualified aerosol is transported to the collection chamber 110 again, and cooperates with the far-infrared desorption tube 310 to perform a cyclic desorption operation to increase the desorption effect.

Working principle: when the equipment is in use, the first delivery pump 210 provides suction, and the atmospheric gas is delivered to the collection chamber 110 through the intake pipe 211, and then the second delivery pump 220 works for turning and delivery to the thermal desorption chamber 120 The far-infrared desorption tube 310 performs a far-infrared thermal desorption operation on the aerosol entering the tube, and then transports the aerosol after thermal desorption to the The detection cycle component 400, the meteorological mass spectrometer 410 detects the aerosol after thermal desorption, if the detection is unqualified, the fourth delivery pump 420 is used to supply energy, and the unqualified aerosol is transported to the collection chamber 110 again, Cooperate with the far-infrared desorption tube 310 to perform cyclic desorption operation to increase the desorption effect.

While the invention has been described above with reference to the embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be used in combination with each other in any way, and the description of these combinations is not exhaustive in this specification only to show In consideration of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (8)

1. The utility model provides an integrative structure of organic aerosol of atmosphere collection and thermal desorption which characterized in that includes:

the inner side of the mounting frame (100) is symmetrically connected with a collection chamber (110) and a heat desorption chamber (120);

the aerosol power component (200) is arranged in the collection chamber (110), is connected with an external control end, and comprises a first delivery pump (210) arranged at the bottom of the inner side of the collection chamber (110), and the input end of the first delivery pump (210) is communicated with the outside through an air inlet pipe (211);

the top of the inner side of the collection chamber (110) is provided with a second delivery pump (220), and the output end of the second delivery pump (220) is communicated with the thermal desorption chamber (120) through a connecting pipe;

the thermal desorption component (300) is connected with an external control end and comprises a far infrared desorption pipe (310) arranged in the thermal desorption chamber (120), and an input port of the far infrared desorption pipe (310) is connected with an output port of the second conveying pump (220) through a connecting pipe;

the output port of the far infrared desorption pipe (310) is communicated with a collection pipe (320), the other port of the collection pipe (320) is connected with a third input pump (330) through an input pipe (331), and the third input pump (330) is arranged at the top of the heat desorption chamber (120).

2. The integrated structure for collecting and thermally desorbing atmospheric organic aerosol as claimed in claim 1, wherein a support frame (121) for supporting the far infrared desorption tube (310) is connected to the inner side of the thermal desorption chamber (120), and a tube slot adapted to the far infrared desorption tube (310) is formed in the support frame (121).

3. An integrated structure of atmospheric organic aerosol collection and thermal desorption as claimed in claim 1, wherein a gas flow meter (211 b) and a solenoid valve (211 c) are connected to the outside of the gas inlet pipe (211) corresponding to the gas inlet port, and the solenoid valve is matched with the gas flow meter (211 b);

the gas flowmeter (211 b) and the electromagnetic valve (211 c) are both connected with an external control end.

4. An integrated structure of atmospheric organic aerosol collection and thermal desorption as claimed in claim 1, wherein the outside of the input tube (331) is communicated with a discharge tube (340), and the discharge tube (340) is provided with a control valve (341) for controlling the open/close state of the input tube (331).

5. An integrated atmospheric organic aerosol collection and thermal desorption structure as claimed in claim 1, wherein a detection circulating component (400) for detecting thermally desorbed aerosol is arranged at the top of the mounting frame (100).

6. An integrated atmospheric organic aerosol collection and thermal desorption structure as claimed in claim 5, wherein the detection cycle unit (400) comprises a meteorological mass spectrometer (410) mounted on top of the mounting frame (100).

7. An integrated atmospheric organic aerosol collecting and thermal desorption structure as claimed in claim 5, wherein the detection cycle unit (400) further comprises a fourth delivery pump (420) connected to the top of the mass spectrometer (410), the input end of the fourth delivery pump (420) is connected to the outlet port of the mass spectrometer (410) through a connecting pipe, and the output end is connected to the collection chamber (110) through a gas pipe (421).

8. An integrated structure for collecting and thermally desorbing organic aerosol from the atmosphere as claimed in claim 1, wherein the end of the air inlet pipe (210) is clamped with a filter screen (211 a).

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