A volatile organic compound wastewater gas chromatography rapid sampling device

Abstract

The utility model provides a volatile organic matter wastewater gas chromatogram quick sampling device, including collection box, soft pad layer, sampling suction head, communication pipe, driving power, vacuum pump, pull handle, control water valve, sampling tube, outer sleeve ring and insert stick, the collection box bottom is equipped with two soft pad layers of thick sponge material, and the collection box front surface is connected with the communication pipe, the communication pipe top is equipped with sampling suction head, the driving power is arranged in the outside top end of collection box, and the driving power is connected together with vacuum pump still, the vacuum pump is assembled on the inside top layer position of collection box, the collection box outside both sides still all are equipped with pull handle, the utility model discloses reasonable in structure, not only can gather up wastewater through pipeline, avoid personnel direct contact contaminated wastewater, still can guarantee the whole airtightness in the sampling process, prevent volatile organic gas unorganized escape, reduce the possibility of detection data error.

Description

Technical Field

[0001] This invention relates to a rapid gas chromatography sampling device for volatile organic compound wastewater, belonging to the field of wastewater sampling technology. Background Technology

[0002] Volatile organic compounds (VOCs) are precursors to PM2.5 and ozone. Controlling VOCs can enhance the synergistic control of PM2.5 and ozone, which is of great significance for achieving synergistic effects in pollution reduction and carbon reduction and promoting the continuous improvement of ecological environment quality. Compared with the control of particulate matter, sulfur dioxide, nitrogen oxides and other pollutants, VOCs are emitted by a wide range of enterprises in large quantities and have a weak management foundation, which has become a shortcoming in atmospheric environmental management.

[0003] Currently, the most common method for detecting and analyzing volatile organic compounds (VOCs) in wastewater is gas chromatography. This method requires sampling and sample preparation. However, for wastewater containing VOCs, directly filling the sampling bottle into the wastewater can have two disadvantages: First, the sampling bottle directly contacts the wastewater, which is heavily polluted, and direct contact may cause skin damage. Second, directly filling the sampling bottle into the wastewater can lead to rapid dispersion of VOCs into the atmosphere during sampling and detection, resulting in errors in the measured values ​​and inaccurate results. Therefore, there is an urgent need for a rapid gas chromatography sampling device for VOC wastewater to address these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a rapid gas chromatography sampling device for volatile organic compound wastewater, thereby solving the problems mentioned in the background section. This invention has a reasonable structure, which not only allows wastewater to be collected through pipelines, avoiding direct contact between personnel and polluted wastewater, but also ensures overall sealing during the sampling process, preventing the unorganized escape of volatile organic gases and reducing the possibility of errors in the detection data.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid gas chromatography sampling device for volatile organic compound wastewater, comprising a collection box, a soft padding layer, a sampling pipette, a connecting tube, a driving power supply, a vacuum pump, a lifting handle, a control water valve, a sampling tube, an outer ring, and an insertion rod. The bottom of the collection box is provided with two thick sponge-material soft padding layers, and a connecting tube is connected to the front of the collection box. A sampling pipette is located at the top of the connecting tube. The driving power supply is located at the top exterior of the collection box and is also connected to the vacuum pump, which is mounted on the top interior layer of the collection box. The collection box is equipped with lifting handles on both the left and right sides of its outer side, and multiple control water valves are provided at the bottom of the back of the collection box. The multiple sampling tubes are connected to the control water valves, and an outer ring is fitted over the sampling tube. The outer ring is fixed to the soft padding layer at the bottom of the collection box by a connected rod. The sampling nozzle includes a tubing sleeve, a tube head, a filter screen, an assembly internal thread, and a threaded ring. The tubing sleeve is sealed together with the top of the connecting tube, and an assembly internal thread is provided on the inner wall of the tubing sleeve. The end of the tube head that connects to the tubing sleeve is provided with a threaded ring, and a filter screen is added to the inner wall of the tube head.

[0006] Furthermore, the internal assembly thread inside the tubing sleeve is compatible with the size and thickness of the threaded ring on the sleeve head.

[0007] Furthermore, the inner diameter of the outer ring with the insert is just right to meet the thickness of the sampling tube, and can hold the sampling tube in place.

[0008] Furthermore, the top of each sampling tube is connected to the control water valve via a sealing ring, and the sampling tubes are made of equipment that meets gas chromatography analysis standards.

[0009] Furthermore, the power supply used at the drive power supply location is a detachable portable power supply.

[0010] Furthermore, a waterproof sealing layer is provided at the location where the connecting pipe connects to the collection box.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a rapid gas chromatography sampling device for volatile organic compound wastewater. Because it includes a driving power supply, a vacuum pump, a control water valve, a sampling tube, a tubing sleeve, a tube head, a filter screen, an assembly internal thread, and a threaded ring, the installation method of the threaded ring and the assembly internal thread facilitates the separation of the tubing sleeve and the tube head. This allows for the disassembly and assembly of the filter screen, which effectively filters out impurities and debris carried in the wastewater, preventing them from being collected and affecting subsequent wastewater testing. The vacuum pump extracts internal air to achieve a pressure lower than that inside the wastewater, allowing the wastewater to be sampled and introduced, thus achieving a rapid sampling effect. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the overall structure of a rapid gas chromatography sampling device for volatile organic compound wastewater according to this utility model;

[0014] Figure 2 This is a schematic diagram of the back structure of a rapid gas chromatography sampling device for volatile organic compound wastewater according to this utility model;

[0015] Figure 3 This is a schematic diagram of the sampling tube portion of a rapid gas chromatography sampling device for volatile organic compound wastewater according to this utility model.

[0016] Figure 4 This is a schematic diagram of the sampling pipette head of a rapid gas chromatography sampling device for volatile organic wastewater according to this utility model.

[0017] In the diagram: 1-Collection box, 2-Padded layer, 3-Sampling nozzle, 4-Connecting tube, 5-Drive power supply, 6-Vacuum pump, 7-Lifting handle, 8-Control water valve, 9-Sampling tube, 10-Outer ring, 11-Insertion rod, 31-Tube sleeve, 32-Tube head, 33-Filter screen, 35-Assembly internal thread, 36-Threaded ring. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-4This utility model provides a technical solution: a rapid gas chromatography sampling device for volatile organic compound wastewater, comprising a collection box 1, a soft padding layer 2, a sampling nozzle 3, a connecting tube 4, a driving power supply 5, a vacuum pump 6, a lifting handle 7, a control water valve 8, a sampling tube 9, an outer ring 10, and an insertion rod 11. The bottom of the collection box 1 is provided with two thick sponge-material soft padding layers 2, and the front of the collection box 1 is connected to the connecting tube 4. The top of the connecting tube 4 is provided with the sampling nozzle 3. The driving power supply 5 is located at the top of the outer side of the collection box 1 and is also connected to the vacuum pump 6. The vacuum pump 6 is mounted on the top layer inside the collection box 1. The left and right sides of the outer side of the collection box 1 are also equipped with... Equipped with a lifting handle 7, and multiple control water valves 8 are provided at the bottom of the back of the collection box 1. Multiple sampling tubes 9 are connected to the control water valves 8. An outer ring 10 is also fitted on the outside of the sampling tube 9. The outer ring 10 is fixed to the soft padding layer 2 at the bottom of the collection box 1 by the connected insertion rod 11. The sampling nozzle 3 includes a tubing sleeve 31, a tube head 32, a filter screen 33, an assembly internal thread 35, and a threaded ring 36. The tubing sleeve 31 is sealed together with the top of the connecting tube 4, and an assembly internal thread 35 is provided on the inner wall of the tubing sleeve 31. The end of the tube head 32 that connects to the tubing sleeve 31 is provided with a threaded ring 36, and a filter screen 33 is added to the inner wall of the tube head 32.

[0020] As the first embodiment of this utility model: a waterproof sealing layer is arranged at the connection between the connecting pipe 4 and the collection box 1. This design structure is reasonable and helps to prevent the wastewater collected in the collection box 1 from leaking and affecting the sampling work. The power supply used at the drive power supply 5 is a detachable mobile power supply. This design uses a mobile power supply to provide a drive source for the vacuum pump 6. The vacuum pump 6 extracts air from the collection box 1, making the pressure inside the collection box 1 lower than the external air pressure. In this way, the sampling nozzle 3 is inserted into the wastewater, and the wastewater will be sucked into the collection box 1 along the connecting pipe 4. The top of the sampling tube 9 is equipped with a sealing ring and the tube opening is connected to the control water valve 8. Furthermore, the sampling tubes 9 all use instruments that meet the standards of gas chromatography analysis. The inner diameter of the outer ring 10 with the insert rod 11 is just right to meet the thickness of the sampling tube 9, and can hold the sampling tube 9. This design transfers the wastewater collected in the collection box 1 through multiple sampling tubes 9, which not only divides and quantifies the wastewater used for testing, but also facilitates direct installation into the gas chromatograph. The assembly internal thread 35 in the tubing sleeve 31 and the threaded ring 36 on the tube head 32 are matched in size and thickness. This design, through the installation form of the threaded ring 36 and the assembly internal thread 35, helps to separate the tubing sleeve 31 from the tube head 32, so that the filter screen 33 can be disassembled and installed. The filter screen 33 can effectively filter the impurities and garbage carried in the wastewater, and prevent them from being affected by the sampling collection and subsequent wastewater testing.

[0021] As a second embodiment of this utility model: When sampling and collecting wastewater containing volatile organic compounds, first place the collection box 1 stably, then drop the connecting tube 4 with the sampling nozzle 3 directly into the wastewater. Next, hold the lifting handle 7, connect the power supply 5 to the vacuum pump 6, and start the vacuum pump 6 to extract air from the collection box 1. The air pressure inside the collection box 1 is lower than the air pressure inside the wastewater. Under this air pressure, the wastewater will enter the collection box 1 along the connecting tube 4. When passing through the sampling nozzle 3, the filter screen 33 inside the sampling nozzle 3 will... To prevent debris and garbage from entering the wastewater, after the wastewater slowly accumulates in the collection tank 1, multiple sampling tubes 9 can be connected to the control water valve 8. The outer ring 10 of the sampling tube 9 will lock the sampling tube 9 and be fixed by inserting the rod 11 into the soft pad layer 2. When the control water valve 8 is opened, the wastewater will be injected into the quantitative sampling tubes 9. These sampling tubes 9 can be directly placed into a gas chromatograph for headspace sampling. The wastewater sample is heated, separated using a chromatographic column, and detected using a hydrogen flame ionization detector. After the data stabilizes, the monitoring values ​​are recorded.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rapid gas chromatography sampling device for volatile organic compound wastewater, comprising a collection box (1), a cushion layer (2), a sampling pipette (3), a connecting tube (4), a driving power supply (5), a vacuum pump (6), a lifting handle (7), a control water valve (8), a sampling tube (9), an outer ring (10), and an insertion rod (11), characterized in that, The bottom of the collection box (1) is provided with two thick sponge pads (2), and the front of the collection box (1) is connected to a connecting pipe (4). The top of the connecting pipe (4) is provided with a sampling nozzle (3). The driving power supply (5) is arranged at the top of the outside of the collection box (1), and the driving power supply (5) is also connected to a vacuum pump (6). The vacuum pump (6) is installed at the top of the inside of the collection box (1). The left and right sides of the outside of the collection box (1) are also equipped with lifting handles (7). Multiple control water valves (8) are provided at the bottom of the back of the collection box (1). Multiple sampling tubes (9) are connected to the control water valves (8). An outer ring (10) is also fitted on the outside of the sampling tube (9). The outer ring (10) is fixed to the pads (2) at the bottom of the collection box (1) by the connected plug (11). The sampling nozzle (3) includes a tubing sleeve (31), a tube head (32), a filter screen (33), an assembly internal thread (35), and a threaded ring (36). The tubing sleeve (31) is sealed together with the top end of the connecting tube (4), and an assembly internal thread (35) is provided on the inner wall of the tubing sleeve (31). The end of the tube head (32) that connects to the tubing sleeve (31) is provided with a threaded ring (36), and a filter screen (33) is provided in the inner wall of the tube head (32).

2. The rapid gas chromatography sampling device for volatile organic compound wastewater according to claim 1, characterized in that: A waterproof sealing layer is provided at the position where the connecting pipe (4) connects to the collection box (1).

3. The rapid gas chromatography sampling device for volatile organic compound wastewater according to claim 1, characterized in that: The power supply used at the drive power supply (5) position is a detachable mobile power supply.

4. The rapid gas chromatography sampling device for volatile organic compound wastewater according to claim 1, characterized in that: The top of each sampling tube (9) is connected to the control water valve (8) with a sealing ring, and the sampling tubes (9) are all made of equipment that meets the standards for gas chromatography analysis.

5. The rapid gas chromatography sampling device for volatile organic compound wastewater according to claim 1, characterized in that: The inner diameter of the outer ring (10) with the insert (11) is just right to meet the thickness of the sampling tube (9) and can hold the sampling tube (9).

6. The rapid gas chromatography sampling device for volatile organic compound wastewater according to claim 1, characterized in that: The internal thread (35) inside the sleeve (31) is compatible with the size and thickness of the threaded ring (36) on the sleeve head (32).

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