An apparatus for detecting the content of organochlorine in air and its usage method

Abstract

The present invention relates to the technical field of detection devices. The present application discloses a device for detecting the content of organochlorine in the air and a usage method thereof, which includes an ion chromatograph and an automatic sampler. A cleaning agent bottle and a pure water bottle are arranged on the top of the ion chromatograph. A filter sleeve barrel is arranged at the rear side of the automatic sampler. A support barrel cover is fixed to the top of the filter sleeve barrel through bolts for sealing the filter sleeve barrel. A rotating rod is rotatably arranged inside the filter sleeve barrel, and activated carbon fiber plates are fixed on both sides of the rotating rod. By filtering the air containing organochlorine, the organochlorine in the air is filtered out. After filtration, the activated carbon fiber plates are rinsed, and the sample solvent generated after rinsing is poured into the automatic sampler. It is not necessary for the detection personnel to prepare samples through multiple extraction processes, solving the problem that the air to be detected is inconvenient to process when the existing device for detecting the content of organochlorine in the air is used, and greatly improving the convenience of using the device for detecting the content of organochlorine.

Description

Technical Field

[0001] The present invention application relates to the technical field of detection devices, and particularly to a device for detecting the content of organochlorine in air and a using method thereof. Background Art

[0002] Organochlorine is a class of organic compounds in which hydrogen atoms are replaced by chlorine atoms. It has the characteristics of stable chemical properties, high lipid solubility, and low water solubility. Therefore, it is easily absorbed and accumulated by organisms, posing a potential threat to the environment and human health. It is widely used in agriculture, industry, and daily life, such as pesticides, solvents, and plastics. To ensure the safety of the environment and human health, the detection of organochlorine is particularly important. The detection methods used include gas chromatography-mass spectrometry, ion chromatography, and electrochemical cells.

[0003] Among them, the ion chromatograph is separated based on the reversible exchange between the dissociable ions on the ion exchange resin and the solute ions with the same charge in the mobile phase and the difference in the affinity of the analyte solute for the exchanger. At the same time, most ion chromatographs are equipped with an automatic sampler. However, since the organochlorine in the air cannot directly enter the ion chromatograph as a liquid sample for detection, the detection personnel need to process the air to be detected first, resulting in very cumbersome and inconvenient operation in the detection of the content of organochlorine in the air. Summary of the Invention

[0004] In order to solve the problem that the air to be detected is inconvenient to process when using the existing device for detecting the content of organochlorine in the air, the present invention provides a device for detecting the content of organochlorine in the air and a using method thereof to solve the above problems.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for detecting the content of organochlorine in air and a using method thereof, including an ion chromatograph and an automatic sampler. A cleaning agent bottle and a water purification bottle are arranged on the top of the ion chromatograph. A filter sleeve is arranged at the rear side of the automatic sampler. A support barrel cover is fixed on the top of the filter sleeve by bolts for sealing the filter sleeve. A rotating rod is rotatably arranged inside the filter sleeve. Activated carbon fiber plates are fixed on both sides of the rotating rod. A sample liquid tank is arranged below the filter sleeve. The output end of the sample liquid tank is connected to the input end of the automatic sampler. An air inlet interface pipe is fixedly penetrated through one end of the filter sleeve. A one-way air inlet valve is arranged on the air inlet interface pipe. A connecting cover is fixedly penetrated through the other end in the middle of the filter sleeve. A one-way exhaust valve is arranged on the connecting cover. A water inlet pipe is connected to the top of the sample liquid tank for adding sodium hydroxide solution.

[0007] Further, a drain valve is connected to the bottom of the filter sleeve barrel in a through manner, and the bottom of the drain valve is connected to the bottom of the sample liquid tank in a through manner for discharging the sample liquid inside the filter sleeve barrel into the sample liquid tank. The drain valve is located on the side of the rotating rod.

[0008] Further, a servo motor is provided on the top surface of the support barrel cover. The input end of the servo motor penetrates to the bottom surface of the support barrel cover and is fixed with a connecting rod. A limit insertion block is fixed to the bottom surface of the connecting rod. The rotating rod is sleeved on the connecting rod and the limit insertion block. Another limit insertion block is fixed to the bottom of the rotating rod. A rotating sealing rod is sleeved on the limit insertion block. The bottom of the rotating sealing rod is rotatably connected inside the filter sleeve barrel.

[0009] Further, a drain pipe is provided on one side of the sample liquid tank close to the auto sampler. The drain pipe is connected to the input end of the auto sampler in a through manner, and a three-way drain valve is provided on the drain pipe.

[0010] Further, both sides of the activated carbon fiber board are slidably attached to the inner wall of the filter sleeve barrel. The upper and lower ends of the activated carbon fiber board are respectively attached to the bottom surface of the support barrel cover and the top surface of the rotating sealing rod. A rectangular groove for cooperating with the limit insertion block is opened inside the rotating rod. A rectangular insertion slot for cooperating with another limit insertion block is opened at the center position of the top surface of the rotating sealing rod. The rotating sealing rod is arranged in an I shape for cooperating with the rotating rod and the activated carbon fiber board.

[0011] Further, the outer surface of one end of the air inlet interface pipe away from the filter sleeve barrel is provided with threads for connecting a collection bottle containing the air to be detected. The air inlet interface pipe and the connecting cover are located on the same horizontal line.

[0012] Further, an exhaust hood is connected to the end of the one-way exhaust valve away from the connecting cover in a through manner. A filter net is fixed to one side of the exhaust hood away from the connecting cover. The bottom surface of the exhaust hood is symmetrically fixed with support rods. The bottom ends of the support rods away from the exhaust hood are fixed to the side wall of the sample liquid tank. The support rods are arranged in an L shape for cooperating with the exhaust hood and the sample liquid tank.

[0013] Further, an activated carbon filter board is slidably inserted inside the exhaust hood. One end of the activated carbon filter board extending to the top surface of the exhaust hood is fixed with a sealing cover plate. The corners of the sealing cover plate are fixed to the top surface of the exhaust hood by bolts. A handle is fixed to the middle of the top surface of the sealing cover plate.

[0014] Further, a water inlet valve is provided on the water inlet pipe, and a through hole for cooperating with the water inlet pipe is opened at the top of the support barrel cover.

[0015] Further, a method for using a device for detecting the content of organochlorine in air, the method comprising the following steps:

[0016] (A) Import the air to be detected into the interior of the filter sleeve for filtration;

[0017] (A1) Screw the collection bottle containing the air to be detected onto the intake interface pipe for fixation. At the same time, close the water inlet valve, drain valve, and three-way liquid discharge valve, open the one-way exhaust valve, and operate the servo motor to drive the rotating rod to rotate. The rotation of the rotating rod drives the activated carbon fiber plate to rotate, so that the activated carbon fiber plate is perpendicular between the one-way intake valve and the connection cover;

[0018] (A2) Then open the one-way intake valve and the switch on the collection bottle, so that the air to be detected enters the interior of the filter sleeve. After the air passes through the activated carbon fiber plate for filtration, it is discharged from the filter sleeve through the connection cover and the one-way exhaust valve. At this time, the organochlorine in the air is filtered on the activated carbon fiber plate;

[0019] (A3) The air discharged from the filter sleeve enters the interior of the exhaust hood under the guidance of the connection cover and the one-way exhaust valve, and is discharged after passing through the activated carbon filter plate and the filter net in sequence;

[0020] (B) Flush the organochlorine on the activated carbon fiber plate;

[0021] (B1) After the filtration is completed, close the intake interface pipe and the one-way exhaust valve. At the same time, insert the pipe connected to the water outlet of the sodium hydroxide solution tank into the interior of the water inlet pipe and open the water inlet valve;

[0022] (B2) Make the sodium hydroxide solution enter the interior of the filter sleeve. At this time, the servo motor operates, and drives the rotating rod to rotate through the connecting rod and the limit insert block. When the rotating rod rotates, it drives the activated carbon fiber plate to rotate, so that the activated carbon fiber plate stirs in the sodium hydroxide solution, and the organochlorine filtered on the activated carbon fiber plate is flushed into the solution;

[0023] (B3) After the flushing is completed, open the drain valve, so that the sample solution in the interior of the filter sleeve enters the sample liquid tank. Then control to open the three-way liquid discharge valve, so that the input end of the auto sampler is communicated with the interior of the sample liquid tank. The auto sampler operates, sucks the sample solution into its input end through the drain pipe, and injects the sample solution into the ion chromatograph after being processed by the auto sampler. Then open the ion chromatograph, and control the operation of the ion chromatograph through the computer for detection;

[0024] (C) Drain the residual liquid and perform cleaning;

[0025] (C1) After the detection is completed, control the three-way liquid discharge valve to open it to the other discharge port, and at this time, the residual solution in the sample liquid tank is discharged;

[0026] (C2) Meanwhile, continue to add purified water through the water inlet pipe, and the servo motor continues to operate to drive the activated carbon fiber board to rotate, flushing the remaining solution inside the filter sleeve barrel until it is clean. At this time, the drain valve is in the open state, and the wastewater generated by the flushing flows downward into the sample liquid tank and is continuously discharged through the three-way drain valve.

[0027] (D) Maintenance of the detection device;

[0028] (D1) When the activated carbon fiber board needs to be replaced after long-term use, turn the bolt to release the fixation between the support barrel cover and the filter sleeve barrel, pull up the support barrel cover, so that the connecting rod and the limit insertion block are pulled out of the rotating rod, and then pull the rotating rod to pull out the other limit insertion block from the inside of the connecting rod, then the activated carbon fiber board can be replaced. Then insert the bottom of the new rotating rod into the rotating sealing rod, and cover the support barrel cover on the filter sleeve barrel, so that the connecting rod and the limit insertion block are inserted into the rotating rod, and fix the support barrel cover and the filter sleeve barrel with bolts.

[0029] (D2) When the sealing cover plate needs to be replaced after long-term use, turn the bolt on the sealing cover plate to release the fixation between the sealing cover plate and the exhaust hood, and then pull the sealing cover plate to take out the activated carbon filter plate for cleaning or replacement.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. In the present invention, by filtering the air containing organochlorine, the organochlorine in the air is filtered out. After filtration, the activated carbon fiber board is rinsed, and the sample solvent generated after rinsing is poured into the auto sampler. There is no need for the tester to prepare samples through multiple extraction processes, solving the problem that the air to be detected is inconvenient to process when using the existing air organochlorine content detection device, and greatly improving the convenience of using the organochlorine content detection device.

[0032] 2. In the present invention, through the detachable powder type filter screen, during each filtration, the corresponding type of activated carbon fiber board can be selected according to the types of harmful substances in the air to be detected. At the same time, when the filtration effect of the activated carbon fiber board decreases after long-term use, the activated carbon fiber board can be replaced in time, thereby improving the convenience of maintaining the organochlorine content detection device.

[0033] 3. In the present invention, through the filtration structure at the exhaust end, after the organochlorine in the air is filtered out, the remaining impurities and odors in the air are filtered out through the activated carbon filter board, avoiding the pollution of the discharged air to the environment, further improving the safety of using the organochlorine content detection device, and the detachable design of the activated carbon filter board facilitates its replacement, ensuring the filtration and purification effect at the exhaust end. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a three-dimensional structural schematic diagram of an organic chlorine content detection device according to an embodiment of the present application;

[0036] Figure 2 is Figure 1 Another perspective three-dimensional structural schematic diagram of the organic chlorine content detection device in the illustrated embodiment;

[0037] Figure 3 is Figure 1 A three-dimensional structural schematic diagram of a partial structure of the organic chlorine content detection device in the illustrated embodiment;

[0038] Figure 4 is Figure 1 A three-dimensional structural schematic diagram of the organic chlorine content detection device during cleaning in the illustrated embodiment;

[0039] Figure 5 is Figure 1 A bottom-up structural schematic diagram of the organic chlorine content detection device during cleaning in the illustrated embodiment.

[0040] The meanings of the reference numerals in the drawings: 1. Ion chromatograph; 2. Automatic sampler; 3. Cleaner bottle; 4. Purified water bottle; 5. Filter sleeve barrel; 6. Sample liquid tank; 7. Support barrel cover; 8. Servo motor; 9. Rotating rod; 10. Activated carbon fiber board; 11. Drain valve; 12. Intake interface pipe; 13. One-way intake valve; 14. Connection cover; 15. One-way exhaust valve; 16. Exhaust hood; 17. Filter net; 18. Support rod; 19. Sealing cover plate; 20. Activated carbon filter plate; 21. Drain pipe; 22. Three-way drain valve; 23. Water inlet pipe; 24. Water inlet valve; 25. Rotating sealing rod; 26. Connecting rod; 27. Limit insertion block. Detailed implementation manners

[0041] To make the application purpose, features, and advantages of the present application more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0042] Refer to Figure 1, Figure 2 and Figure 4 , an apparatus and method for detecting the content of organochlorine in air, including an ion chromatograph 1 and an auto sampler 2. A cleaner bottle 3 and a water purification bottle 4 are arranged on the top of the ion chromatograph 1. A filter sleeve 5 is arranged at the rear side of the auto sampler 2. A support barrel cover 7 is fixed on the top of the filter sleeve 5 through bolts for sealing the filter sleeve 5. A rotating rod 9 is rotatably arranged inside the filter sleeve 5. Activated carbon fiber plates 10 are fixed on both sides of the rotating rod 9. A sample liquid tank 6 is arranged below the filter sleeve 5. A drain valve 11 is connected through the bottom of the filter sleeve 5, and the bottom of the drain valve 11 is connected through the bottom of the sample liquid tank 6 for draining the sample liquid inside the filter sleeve 5 into the sample liquid tank 6. The drain valve 11 is located at the side of the rotating rod 9. The output end of the sample liquid tank 6 is connected to the input end of the auto sampler 2. A drain pipe 21 is arranged on one side of the sample liquid tank 6 close to the auto sampler 2. The drain pipe 21 is connected through the input end of the auto sampler 2. A three-way drain valve 22 is arranged on the drain pipe 21. An air inlet interface pipe 12 is fixedly connected through one end of the filter sleeve 5. The outer surface of the end of the air inlet interface pipe 12 away from the filter sleeve 5 is provided with threads for connecting a collection bottle filled with air to be detected. The air inlet interface pipe 12 and the center line of the connection cover 14 are on the same horizontal line. A one-way air inlet valve 13 is arranged on the air inlet interface pipe 12. Another connection cover 14 is fixedly connected through the middle of the other end of the filter sleeve 5. A one-way exhaust valve 15 is arranged on the connection cover 14. A water inlet pipe 23 is connected through the top of the sample liquid tank 6 for adding sodium hydroxide solution. A water inlet valve 24 is arranged on the water inlet pipe 23. A through hole matching the water inlet pipe 23 is opened on the top of the support barrel cover 7.

[0043] As an optimized solution, as Figure 3 and Figure 5 shown, a servo motor 8 is arranged on the top surface of the support barrel cover 7. The input end of the servo motor 8 penetrates to the bottom surface of the support barrel cover 7 and is fixed with a connecting rod 26. A limit insertion block 27 is fixed on the bottom surface of the connecting rod 26. The rotating rod 9 is sleeved on the connecting rod 26 and the limit insertion block 27. Another limit insertion block 27 is fixed at the bottom of the rotating rod 9. A rotating sealing rod 25 is sleeved on the limit insertion block 27. The bottom of the rotating sealing rod 25 is rotatably connected inside the filter sleeve 5.

[0044] Specifically, both sides of the activated carbon fiber board 10 are slidably fitted with the inner wall of the filter sleeve barrel 5. The upper and lower ends of the activated carbon fiber board 10 are respectively fitted with the bottom surface of the support barrel cover 7 and the top surface of the rotating sealing rod 25. A rectangular groove for cooperating with the limit insertion block 27 is provided inside the rotating rod 9, and a rectangular slot for cooperating with another limit insertion block 27 is provided at the center position of the top surface of the rotating sealing rod 25. When the rotating rod 9 rotates, it can also drive the rotating sealing rod 25 to rotate. At the same time, the rotating sealing rod 25 cooperates with the activated carbon fiber board 10 to ensure that the air inlet interface pipe 12 and the connecting cover 14 can be separated, so as to ensure that the air can be filtered by the activated carbon fiber board 10 both before entering and before discharging. The rotating sealing rod 25 is arranged in a shape of one character for cooperating with the rotating rod 9 and the activated carbon fiber board 10.

[0045] As a further optimized solution, as Figure 5 shown, one end of the one-way exhaust valve 15 far from the connecting cover 14 is connected through and communicated with an exhaust hood 16. An activated carbon filter board 20 is slidably inserted inside the exhaust hood 16. One end of the activated carbon filter board 20 extending to the top surface of the exhaust hood 16 is fixed with a sealing cover plate 19. The corners of the sealing cover plate 19 are fixed to the top surface of the exhaust hood 16 by bolts. A handle is fixed in the middle of the top surface of the sealing cover plate 19. A filter net 17 is fixed to the side of the exhaust hood 16 far from the connecting cover 14. Support rods 18 are symmetrically fixed to the bottom surface of the exhaust hood 16. One end of the bottom of the support rod 18 far from the exhaust hood 16 is fixed to the side wall of the sample liquid tank 6. The support rod 18 is arranged in an L shape for cooperating with the exhaust hood 16 and the sample liquid tank 6.

[0046] Working principle: The usage method includes the following steps:

[0047] During detection, the air to be detected is introduced into the filter sleeve barrel 5 for filtration. The collection bottle filled with the air to be detected is screwed onto the air inlet interface pipe 12 for fixation. At the same time, the water inlet valve 24, the drain valve 11, and the three-way liquid discharge valve 22 are closed. Then, the one-way air inlet valve 13 and the switch on the collection bottle are opened, so that the air to be detected enters the filter sleeve barrel 5. After the air inside passes through the filtration of the activated carbon fiber board 10, it is discharged from the filter sleeve barrel 5 through the connecting cover 14 and the one-way exhaust valve 15. At this time, the organochlorine in the air is filtered on the activated carbon fiber board 10. The air discharged from the filter sleeve barrel 5 enters the exhaust hood 16 under the guidance of the connecting cover 14 and the one-way exhaust valve 15, and is discharged after being filtered by the activated carbon filter board 20 and the filter net 17 in sequence;

[0048] Rinse the organochlorine on the activated carbon fiber board 10. After filtration is completed, close the intake interface pipe 12 and the one-way exhaust valve 15. At the same time, insert the pipe connected to the water outlet of the sodium hydroxide solution tank into the inside of the water inlet pipe 23, and open the water inlet valve 24 so that the sodium hydroxide solution enters the inside of the filter sleeve 5. At this time, the servo motor 8 operates, and drives the rotating rod 9 to rotate through the connecting rod 26 and the limit insertion block 27. When the rotating rod 9 rotates, it drives the activated carbon fiber board 10 to rotate, causing the activated carbon fiber board 10 to stir in the sodium hydroxide solution, and rinsing the filtered organochlorine on the activated carbon fiber board 10 into the solution. After rinsing is completed, open the drain valve 11 so that the sample solution inside the filter sleeve 5 enters the sample liquid tank 6. Then control the opening of the three-way drain valve 22 so that the input end of the auto-sampler 2 communicates with the inside of the sample liquid tank 6. The auto-sampler 2 operates, sucks the sample solution into its input end through the drain pipe 21, and injects the sample solution into the ion chromatograph 1 after being processed by the auto-sampler 2. Then turn on the ion chromatograph 1 and control the operation of the ion chromatograph 1 through a computer for detection;

[0049] Discharge the residual liquid and conduct cleaning. After the detection is completed, control the three-way drain valve 22 so that the three-way drain valve 22 is opened to another discharge port. At this time, the residual solution in the sample liquid tank 6 is discharged. At the same time, continue to add clean water through the water inlet pipe 23. The servo motor 8 continues to operate to drive the activated carbon fiber board 10 to rotate, and rinse the residual solution inside the filter sleeve 5 clean. At this time, the drain valve 11 is in the open state, and the waste water generated by rinsing flows down and is discharged into the sample liquid tank 6, and continues to be discharged through the three-way drain valve 22;

[0050] When the activated carbon fiber board 10 needs to be replaced after long-term use, turn the bolt to release the fixation between the support barrel cover 7 and the filter sleeve 5, pull up the support barrel cover 7 to pull out the connecting rod 26 and the limit insertion block 27 from the rotating rod 9, and then pull the rotating rod 9 to pull out the other limit insertion block 27 from the inside of the connecting rod 26, then the activated carbon fiber board 10 can be replaced. Then insert the bottom of the new rotating rod 9 into the rotating sealing rod 25, and cover the support barrel cover 7 on the filter sleeve 5 so that the connecting rod 26 and the limit insertion block 27 are inserted into the rotating rod 9, and fix the support barrel cover 7 and the filter sleeve 5 with bolts. When the sealing cover plate 19 needs to be replaced after long-term use, turn the bolt on the sealing cover plate 19 to release the fixation between the sealing cover plate 19 and the exhaust hood 16, and then pull the sealing cover plate 19 to take out the activated carbon filter plate 20 for cleaning or replacement.

[0051] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present application. Any reference signs in the claims should not be construed as limiting the claims involved.

[0052] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An apparatus for detecting the content of organochlorine in air, characterized in that: It includes an ion chromatograph (1) and an auto sampler (2). A cleaner bottle (3) and a water purification bottle (4) are arranged on the top of the ion chromatograph (1). A filter sleeve barrel (5) is arranged at the rear side of the auto sampler (2). A support barrel cover (7) is fixed on the top of the filter sleeve barrel (5) by bolts for sealing the filter sleeve barrel (5). A rotating rod (9) is rotatably arranged inside the filter sleeve barrel (5). Activated carbon fiber plates (10) are fixed on both sides of the rotating rod (9). A sample liquid tank (6) is arranged below the filter sleeve barrel (5). The output end of the sample liquid tank (6) is connected to the input end of the auto sampler (2). One end of the filter sleeve barrel (5) is fixedly penetrated with an air inlet interface pipe (12). A one-way air inlet valve (13) is arranged on the air inlet interface pipe (12). The middle of the other end of the filter sleeve barrel (5) is fixedly penetrated with a connection cover (14). A one-way exhaust valve (15) is arranged on the connection cover (14). A water inlet pipe (23) is connected to the top of the sample liquid tank (6) for adding sodium hydroxide solution; A drain valve (11) is fixedly penetrated at the bottom of the filter sleeve barrel (5). The bottom of the drain valve (11) is fixedly penetrated at the bottom of the sample liquid tank (6) for discharging the sample liquid inside the filter sleeve barrel (5) into the sample liquid tank (6). The drain valve (11) is located at the side of the rotating rod (9); A servo motor (8) is arranged on the top surface of the support barrel cover (7). The input end of the servo motor (8) penetrates to the bottom surface of the support barrel cover (7) and is fixed with a connecting rod (26). A limit insertion block (27) is fixed on the bottom surface of the connecting rod (26). The rotating rod (9) is sleeved on the connecting rod (26) and the limit insertion block (27). Another limit insertion block (27) is fixed at the bottom of the rotating rod (9). A rotating sealing rod (25) is sleeved on the limit insertion block (27). The bottom of the rotating sealing rod (25) is rotatably connected inside the filter sleeve barrel (5); A drain pipe (21) is arranged on one side of the sample liquid tank (6) close to the auto sampler (2). The drain pipe (21) is connected to the input end of the auto sampler (2) in a penetrating manner. A three-way drain valve (22) is arranged on the drain pipe (21); The two sides of the activated carbon fiber plate (10) are slidably attached to the inner wall of the filter sleeve barrel (5). The upper and lower ends of the activated carbon fiber plate (10) are respectively attached to the bottom surface of the support barrel cover (7) and the top surface of the rotating sealing rod (25). A rectangular groove for cooperating with the limit insertion block (27) is opened inside the rotating rod (9). A rectangular slot for cooperating with another limit insertion block (27) is opened at the center position of the top surface of the rotating sealing rod (25). The rotating sealing rod (25) is arranged in a shape of one character for cooperating with the rotating rod (9) and the activated carbon fiber plate (10); The outer surface of one end of the air inlet interface pipe (12) far away from the filter sleeve barrel (5) is provided with threads for connecting a collection bottle filled with air to be detected. The air inlet interface pipe (12) and the connection cover (14) are located on the same horizontal line; One end of the one-way exhaust valve (15) far away from the connection cover (14) is connected through with an exhaust cover (16). A filter net (17) is fixed on one side of the exhaust cover (16) far away from the connection cover (14). Support rods (18) are symmetrically fixed on the bottom surface of the exhaust cover (16). One end of the bottom of the support rod (18) far away from the exhaust cover (16) is fixed on the side wall of the sample liquid tank (6). The support rod (18) is arranged in an L shape to cooperate with the exhaust cover (16) and the sample liquid tank (6). An activated carbon filter plate (20) is slidably inserted inside the exhaust cover (16). One end of the activated carbon filter plate (20) extending to the top surface of the exhaust cover (16) is fixed with a sealing cover plate (19). The corners of the sealing cover plate (19) are fixed on the top surface of the exhaust cover (16) by bolts. A handle is fixed in the middle of the top surface of the sealing cover plate (19). An inlet valve (24) is arranged on the water inlet pipe (23). A through hole matching with the water inlet pipe (23) is opened at the top of the support barrel cover (7).

2. A method for using a device for detecting the content of organochlorine in air obtained from the device for detecting the content of organochlorine in air according to claim 1, characterized in that: The using method includes the following steps: (A), Introduce the air to be detected into the inside of the filter sleeve barrel (5) and filter it; (A1), Screw the collection bottle filled with the air to be detected onto the air inlet interface pipe (12) and fix it. At the same time, close the inlet valve (24), the drain valve (11) and the three-way liquid discharge valve (22), open the one-way exhaust valve (15), and the servo motor (8) runs to drive the rotating rod (9) to rotate. The rotating rod (9) rotates to drive the activated carbon fiber plate (10) to rotate, so that the activated carbon fiber plate (10) is perpendicular between the one-way air inlet valve (13) and the connection cover (14); (A2), Then open the one-way air inlet valve (13) and the switch on the collection bottle, so that the air to be detected enters the inside of the filter sleeve barrel (5). After the air passes through the activated carbon fiber plate (10) for filtration, it is discharged from the filter sleeve barrel (5) through the connection cover (14) and the one-way exhaust valve (15). At this time, the organochlorine in the air is filtered on the activated carbon fiber plate (10); (A3), The air discharged from the filter sleeve barrel (5) enters the inside of the exhaust cover (16) under the guidance of the connection cover (14) and the one-way exhaust valve (15), and is discharged after being filtered by the activated carbon filter plate (20) and the filter net (17) in sequence; (B), Flush the organochlorine on the activated carbon fiber plate (10); (B1), After the filtration is completed, close the air inlet interface pipe (12) and the one-way exhaust valve (15). At the same time, insert the pipe connected to the water outlet of the sodium hydroxide solution tank into the inside of the water inlet pipe (23), and open the inlet valve (24); (B2), Make the sodium hydroxide solution enter the inside of the filter sleeve barrel (5). At this time, the servo motor (8) runs, and drives the rotating rod (9) to rotate through the connecting rod (26) and the limit insertion block (27). When the rotating rod (9) rotates, it drives the activated carbon fiber plate (10) to rotate, so that the activated carbon fiber plate (10) stirs in the sodium hydroxide solution, and the organochlorine filtered on the activated carbon fiber plate (10) is flushed into the solution; (B3)After rinsing is completed, open the drain valve (11) so that the sample solution inside the filter sleeve barrel (5) enters the sample liquid tank (6). Then, control the opening of the three-way drain valve (22) to connect the input end of the auto-sampler (2) to the inside of the sample liquid tank (6). The auto-sampler (2) operates to suck the sample solution into its input end through the drain pipe (21), and after being processed by the auto-sampler (2), injects the sample into the ion chromatograph (1). Then, turn on the ion chromatograph (1) and control its operation through a computer for detection; (C)Discharge the residual liquid and perform cleaning; (C1)After the detection is completed, control the three-way drain valve (22) to open it to another discharge port, and at this time, the residual solution in the sample liquid tank (6) is discharged; (C2)At the same time, continue to add clean water through the water inlet pipe (23), and the servo motor (8) continues to operate to drive the activated carbon fiber board (10) to rotate, flushing the residual solution inside the filter sleeve barrel (5) clean. At this time, the drain valve (11) is in the open state, and the waste water generated by flushing flows downward and is discharged into the sample liquid tank (6), and continues to be discharged through the three-way drain valve (22); (D)Maintenance of the detection device; (D1)When the activated carbon fiber board (10) needs to be replaced after long-term use, loosen the bolts to release the fixation between the support barrel cover (7) and the filter sleeve barrel (5), pull up the support barrel cover (7) to pull out the connecting rod (26) and the limit insertion block (27) from the rotating rod (9), and then pull the rotating rod (9) to pull out the other limit insertion block (27) from the inside of the connecting rod (26), then the activated carbon fiber board (10) can be replaced. Then, insert the bottom of the new rotating rod (9) into the rotating sealing rod (25), and cover the support barrel cover (7) on the filter sleeve barrel (5) so that the connecting rod (26) and the limit insertion block (27) are inserted into the rotating rod (9), and fix the support barrel cover (7) and the filter sleeve barrel (5) with bolts; (D2)When the sealing cover plate (19) needs to be replaced after long-term use, loosen the bolts on the sealing cover plate (19) to release the fixation between the sealing cover plate (19) and the exhaust hood (16), and then pull the sealing cover plate (19) to take out the activated carbon filter plate (20) for cleaning or replacement.

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