Volatile organic compound extraction integrated device based on zero headspace extractor

Abstract

The utility model discloses a volatile organic compound extraction integrated device based on zero headspace extractor, which comprises an oscillator main body, a zero headspace extractor body, a fluid metering pump, an airtight injector and a support, the support is provided with a rotary joint, and the rotary joint and an output shaft of the oscillator main body are coaxially arranged; an output shaft of the oscillator main body is connected with the zero-headspace extractor body through the rotating frame, the top end of the zero-headspace extractor body is connected with a first end of the rotating joint, the bottom side of the zero-headspace extractor body is connected with the portable air compressor, and the other two ends of the rotating joint are connected with the fluid metering pump and the airtight injector respectively. According to the utility model, in the extraction operation process, only the connection and separation problems of the zero headspace extractor and the air compressor are involved except for opening and closing valves on related pipelines, so that the process is simplified, the working efficiency is improved, the pipelines do not need to be disassembled and connected for many times, the operation time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zero headspace extractors, in particular to an integrated device for extracting volatile organic matter based on a zero headspace extractor. Background Art

[0002] The zero headspace extractor is a special extraction equipment developed for the solid leaching toxicity reversal method. When solid waste containing hazardous substances encounters water during the stacking or disposal process, the hazardous substances in it migrate and transform, polluting the environment. The leaching laboratory simulates this natural process in the field or experimentally.

[0003] When the amount of leached harmful substances exceeds the threshold value proposed by relevant regulations, the waste has leaching toxicity. The identification of leaching toxicity of solid waste is the basis for judging hazardous waste. Zero headspace is generally a pretreatment equipment used for volatile organic matter in solid waste or hazardous waste. The purpose is to filter out the volatile organic matter in solid waste or hazardous waste through the zero headspace device, and then filter the leachate under high pressure to obtain the extract. The headspace sampler can be directly injected into the gas chromatography-mass spectrometer for measurement after setting the conditions. It is more common for soil or water samples. When the relative temperature equilibrium is reached, the upper gas is sampled. Combined with it, automated pretreatment and analytical testing can be achieved.

[0004] The existing patent texts with application numbers 201621267745.5 and 202121261079.5 disclose the structure and working principle of the zero headspace extractor. However, during operation, the zero headspace extractor inevitably needs to be connected and removed with various external devices, which is inconvenient and has low working efficiency. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problems mentioned in the above background technology and to propose an integrated device for extracting volatile organic compounds based on a zero headspace extractor.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A volatile organic compound extraction integrated device based on a zero headspace extractor comprises an oscillator body, a zero headspace extractor body, a fluid metering pump, an airtight syringe and a bracket, wherein a rotary joint is installed on the bracket, and the rotary joint is coaxially arranged with an output shaft of the oscillator body;

[0008] The output shaft of the oscillator body is connected to the zero headspace extractor body through a rotating frame, the top of the zero headspace extractor body is connected to the first end of a rotary joint, the bottom side of the zero headspace extractor body is connected to a portable air compressor, and the other two ends of the rotary joint are respectively connected to a fluid metering pump and an airtight syringe. The zero headspace extractor body, the rotary joint, the fluid metering pump, the airtight syringe or the portable air compressor are connected to another device through a pipeline assembly, and a valve assembly is installed on the pipeline.

[0009] As a further description of the above technical solution:

[0010] The output shaft end of the oscillator body is fixedly connected with a U-shaped rotating frame, the middle two sides of the zero headspace extractor body are fixedly connected with sleeves, and the two sides of the rotating frame are screwed with positioning studs inserted into the sleeves.

[0011] As a further description of the above technical solution:

[0012] A cushion block for supporting the zero headspace extractor body is placed on the bracket.

[0013] As a further description of the above technical solution:

[0014] The top of the zero headspace extractor body is connected to a T-shaped first connecting tube, the second end of the first connecting tube is connected to the first end of the rotary joint through a hard second connecting tube, the second end and the third end of the rotary joint are respectively connected to the first end of the fluid metering pump and the airtight syringe, and the bottom side of the zero headspace extractor body is connected to a third connecting tube.

[0015] As a further description of the above technical solution:

[0016] A first valve is installed on the third end of the first connecting pipe, a second valve and a third valve are installed on the first ends of the fluid metering pump and the airtight syringe respectively, and a fourth valve is installed on the third connecting pipe.

[0017] As a further description of the above technical solution:

[0018] The utility model also comprises a base, and the base is used for fixing and installing the oscillator body.

[0019] As a further description of the above technical solution:

[0020] Also included is a pressure gauge mounted on the bottom side of the zero headspace extractor body.

[0021] In summary, due to the adoption of the above technical scheme, the beneficial effect of the utility model is that during the extraction operation, in addition to opening and closing the valves on the relevant pipelines, it only involves the connection and separation of the zero headspace extractor and the air compressor, which simplifies the process, improves work efficiency, does not require multiple disassembly and connection of the pipelines, saves operation time, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic front view of an extraction system provided according to an embodiment of the utility model is shown;

[0023] Figure 2 A schematic diagram showing the connection between a rotating rack of an extraction system and a zero headspace extractor body provided according to an embodiment of the utility model is shown.

[0024] Legend:

[0025] 1. Oscillator body; 2. Rotating frame; 3. Zero headspace extractor body; 4. First valve; 5. First connecting pipe; 6. Second connecting pipe; 7. Rotary joint; 8. Second valve; 9. Fluid metering pump; 10. Medicine box; 11. Third connecting pipe; 12. Third valve; 13. Positioning stud; 14. Pressure gauge; 15. Spacer; 16. Fourth valve; 17. Airtight syringe; 18. Bracket; 19. Base; 20. Sleeve; 21. Portable air compressor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-2 The utility model provides a technical solution: an integrated device for extracting volatile organic compounds based on a zero headspace extractor, comprising an oscillator body 1, a zero headspace extractor body 3, a fluid metering pump 9, an airtight syringe 17 and a bracket 18. The base 19 is used to fix the oscillator body 1. A pad 15 for supporting the zero headspace extractor body 3 is placed on the bracket 18. Before the zero headspace extractor body 3 is flipped, the pad 15 is taken out. For the remaining operations, the pad 15 is placed at the bottom of the zero headspace extractor body 3 to ensure its placement stability and facilitate the extraction operation. Among them, the zero headspace extractor body (with a piston, a stainless steel filter, etc. arranged inside), the fluid metering pump, the airtight syringe, and the oscillator body (the same structure as the existing flip oscillator body) are existing products, and the specific structure will not be repeated in this embodiment.

[0028] like Figure 1 and Figure 2 As shown, a rotating joint 7 is installed on the bracket 18, and the rotating joint 7 is coaxially arranged with the output shaft of the oscillator body 1 to ensure that the zero headspace extractor body 3 is not interfered by the pipeline connection relationship when rotating, to ensure that it can realize the flipping process involved in the operation process, and to save the process of disconnecting and connecting with external equipment. The end of the output shaft of the oscillator body 1 is fixedly connected with a U-shaped rotating frame 2, and the sleeves 20 are fixedly connected on both sides of the middle of the zero headspace extractor body 3. The two sides of the rotating frame 2 are screwed with positioning studs 13 inserted into the sleeve 20. When the oscillator body 1 is started, the output shaft of the oscillator body 1 drives the zero headspace extractor body 3 to flip through the U-shaped rotating frame 2.

[0029] Specifically, Figure 1 As shown, the output shaft of the oscillator body 1 is connected to the zero headspace extractor body 3 through the rotating frame 2, the top of the zero headspace extractor body 3 is connected with a T-shaped first connecting pipe 5, the second end of the first connecting pipe 5 is connected to the first end of the rotary joint 7 through a hard second connecting pipe 6, the second end and the third end of the rotary joint 7 are respectively connected to the first end of the fluid metering pump 9 and the airtight syringe 17, the bottom side of the zero headspace extractor body 3 is connected with a third connecting pipe 11, the third connecting pipe 11 is connected to a portable air compressor 21, the third end of the first connecting pipe 5 is installed with a first valve 4, the first end of the fluid metering pump 9 and the airtight syringe 17 are respectively installed with a second valve 8 and a third valve 12, the third connecting pipe 11 is installed with a fourth valve 16, and the pressure gauge 14 is installed on the bottom side of the zero headspace extractor body 3. In the corresponding operation process, the valves on the relevant pipelines can be opened and closed without multiple disassembly of the pipelines, saving operation time and improving work efficiency.

[0030] Working principle: When using, follow the steps below:

[0031] Step 1: Unscrew the four knobs on the top of the zero headspace extractor body 3 and remove the top cover;

[0032] Step 2: Take out the two stainless steel filters;

[0033] Step 3, open the fourth valve 16, use a tamping rod to press the middle piston of the zero headspace extractor body 3 to move downward, move downward about 5 cm, and place the sample. If there is enough space to place the sample, there is no need to move downward;

[0034] Step 4: After putting the sample in, put a filter membrane between the two stainless steel filter screens, then put the filter screen with the filter membrane in the middle on the extractor, cover it with the lid, and tighten the four knobs symmetrically;

[0035] Step 5: Prepare the extractant and reagent and inject them into the reagent box 10, open the second valve 8, and use the fluid metering pump 9 to input the prepared extractant and reagent from the top of the zero headspace extractor body 3;

[0036] Step 6: After the extractant and reagent are input, the extra space inside needs to be emptied, the portable air compressor 21 and the first valve 4 are turned on, and the air outlet flow of the transparent hard tube on the air compressor is touched by hand to adjust it to have a weak airflow;

[0037] Step 7, connect the transparent hard tube and the third connecting tube 11, open the fourth valve 16, with the slow input of airflow, the internal space of the zero headspace extractor body 3 slowly expands, slowly pushes the piston to move upward, when liquid appears on the third end of the first connecting tube 5, immediately close the first valve 4, continue to input airflow into the zero headspace extractor body 3, when there is any value on the pressure gauge 4, the fourth valve 16 can be closed to separate the transparent hard tube and the third connecting tube 11;

[0038] Step eight, start the oscillator body 1, and the output shaft of the oscillator body 1 drives the zero headspace extractor body 3 to flip and oscillate for 18 hours through the U-shaped rotating frame 2;

[0039] Step 9, after turning over for 18 hours, remove and close the oscillator body 1, and observe whether the pressure gauge 14 of the zero headspace extractor has a value. If there is a value, it proves that the entire experiment is in a sealed state. If there is no value, it means that the experiment is exposed to the air and the experiment fails;

[0040] Step 10, opening the air compressor, the third valve 12 and the fourth valve 16, the air compressor pressurizes the zero head space extractor to push the piston to move, so that the leachate is pressed out from the top of the zero head space extractor;

[0041] Step 11, after the extract in the zero headspace extractor is transferred to the 500 ml airtight syringe 17, the pressurization is stopped, the transparent hard tube is removed, and all the valves of the zero space are opened;

[0042] The entire operation process mentioned above only involves the connection and separation of the zero headspace extractor and the air compressor, which simplifies the process and improves work efficiency.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A volatile organic compound extraction integrated device based on a zero headspace extractor, comprising an oscillator body (1), a zero headspace extractor body (3), a fluid metering pump (9), a gas-tight syringe (17) and a bracket (18), characterized in that: A rotary joint (7) is mounted on the bracket (18), and the rotary joint (7) is coaxially arranged with the output shaft of the oscillator body (1); The output shaft of the oscillator body (1) is connected to the zero headspace extractor body (3) through a rotating frame (2); the top of the zero headspace extractor body (3) is connected to the first end of a rotary joint (7); the bottom of the zero headspace extractor body (3) is connected to a portable air compressor (21); the other two ends of the rotary joint (7) are respectively connected to a fluid metering pump (9) and an airtight syringe (17); the zero headspace extractor body (3) or the rotary joint (7) or the fluid metering pump (9) or the airtight syringe (17) or the portable air compressor (21) is connected to another device through a pipeline assembly, and a valve assembly is installed on the pipeline.

2. The integrated device for extracting volatile organic compounds based on a zero headspace extractor according to claim 1, characterized in that: The output shaft end of the oscillator body (1) is fixedly connected to a U-shaped rotating frame (2), the middle two sides of the zero headspace extractor body (3) are fixedly connected to sleeves (20), and the two sides of the rotating frame (2) are screwed together with positioning studs (13) inserted into the sleeves (20).

3. The volatile organic compound extraction integrated device based on a zero headspace extractor according to claim 1, characterized in that: A cushion block (15) for supporting the zero headspace extractor body (3) is placed on the support (18).

4. The integrated device for extracting volatile organic compounds based on a zero headspace extractor according to claim 1, characterized in that: The top of the zero headspace extractor body (3) is connected to a T-shaped first connecting tube (5); the second end of the first connecting tube (5) is connected to the first end of a rotary joint (7) via a hard second connecting tube (6); the second end and the third end of the rotary joint (7) are respectively connected to the first end of a fluid metering pump (9) and a gas-tight syringe (17); and the bottom side of the zero headspace extractor body (3) is connected to a third connecting tube (11).

5. The integrated device for extracting volatile organic compounds based on a zero headspace extractor according to claim 4, characterized in that: A first valve (4) is installed on the third end of the first connecting pipe (5), a second valve (8) and a third valve (12) are installed on the first ends of the fluid metering pump (9) and the airtight syringe (17), respectively, and a fourth valve (16) is installed on the third connecting pipe (11).

6. The integrated device for extracting volatile organic compounds based on a zero headspace extractor according to claim 1, characterized in that: It also comprises a base (19), and the base (19) is used for fixing and mounting the oscillator body (1).

7. The integrated device for extracting volatile organic compounds based on a zero headspace extractor according to claim 1, characterized in that: It also includes a pressure gauge (14), which is installed on the bottom side of the zero headspace extractor body (3).

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