Rapid determination device for volatile organic compounds in river sediment

Abstract

The device comprises a material box, a box door is arranged on one side of the material box, an electric push rod is fixedly connected to the center of the inner bottom of the material box in an embedded mode, and the telescopic end of the electric push rod is fixedly connected with a first piston; a storage grid is arranged at the position, close to the top, in the material box, an equipment frame is fixedly connected to the side, away from the box door, of the inner wall of the material box, an electric heating bar is fixedly connected to the side, close to the middle of the material box, of the equipment frame, and a water collecting tank is fixedly connected to the bottom of the equipment frame. According to the utility model, through the mutual cooperation of the determination storage cylinder, the electrical bar, the fresh air fan and the object placing grid, after sediment sampling is completed, sediment to be detected can be rapidly replaced, and meanwhile, the fresh air fan is utilized to rapidly update air in the material box and equipment, so that the influence on subsequent sediment samples is effectively reduced, and the detection efficiency is improved. The sampling and measuring efficiency of the volatile organic compounds in the river sediment is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic matter determination equipment, in particular to a device for quickly determining volatile organic matter in river sediments. Background Art

[0002] Volatile organic compounds, commonly referred to as VOCs, are often found at high levels in rivers flowing through petrochemical industries. Monitoring VOC concentrations in rivers is an important step in controlling environmental pollution.

[0003] Currently, most methods used on the market are gas chromatography-mass spectrometry for determination. After sampling volatile organic compounds, the sampling tube needs to be replaced or cleaned, which also includes replacing the sampling and storage equipment. This consumes a lot of time and manpower, thus affecting the efficiency of subsequent sampling and determination of volatile organic compounds in river sediments. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A device for rapid determination of volatile organic compounds in river sediments comprises a material box, a box door is provided on one side of the material box, an electric push rod is embedded and fixedly connected at the center of the bottom of the material box, the telescopic end of the electric push rod is fixedly connected to the first piston, a storage grille is provided inside the material box near the top, an inner wall of the material box away from the box door is fixedly connected to an equipment rack, the equipment rack is fixedly connected to an electric heating rod on the side near the middle of the material box, a water collection tank is fixedly connected to the bottom of the equipment rack, a ventilation bin is provided on the top of the material box, air valves are provided at both ends of the ventilation bin, a fresh air fan is fixedly connected to one side of the air valve, a measurement storage cylinder is provided on the top of the ventilation bin, a cylinder cover is provided on the top of the measurement storage cylinder, a cylinder cover is fixedly connected to the top of the cylinder, the telescopic end of the cylinder passes through the cylinder cover and is fixedly connected to the second piston, and a sampling adapter is provided on one side of the top of the measurement storage cylinder.

[0007] As a preferred embodiment of the device for rapidly determining volatile organic compounds in river sediments described in the present invention, the first piston is tightly fitted against the inner wall of the material box. The first piston is raised and lowered within the material box to compress the air pressure within the box, facilitating sampling and detection of the volatilized organic gases. Limiting brackets corresponding to the first piston are fixedly connected to the inner wall of the material box to limit the travel of the first piston.

[0008] As a preferred solution of the device for rapid determination of volatile organic compounds in river sediments described in the utility model, slide rails are fixedly connected on both sides of the inner wall of the material box, and track pulleys corresponding to the slide rails are connected to bearings on both sides of the storage grille, which facilitates auxiliary staff to take out and reinstall the storage grille to replace the river sediments.

[0009] As a preferred solution of the device for rapid determination of volatile organic compounds in river sediments described in the utility model, a plurality of electric heating rods are provided, and the plurality of electric heating rods are evenly distributed at the bottom of the storage grid, so as to facilitate heating of the sediments and enable the volatile organic compounds in the sediments to be better volatilized into gas under constant temperature conditions.

[0010] As a preferred solution of the device for rapid determination of volatile organic compounds in river sediments described in the utility model, the two sides of the water collection tank are arranged at an angle, and the top surface of the water collection tank is provided with mirror stainless steel, which facilitates the collection of heat when the electric heating rod is heated, so that the heat is output upward as much as possible to act on the sediment on the storage grid.

[0011] As a preferred solution of the device for rapid determination of volatile organic compounds in river sediments described in the utility model, one of the two air valves is connected to the exhaust end of the fresh air fan. When the experiment is completed, the air valves on both sides are opened and the fresh air fan is started at the same time to facilitate the replacement of the gas in the material box, thereby reducing the impact on subsequent measurements.

[0012] As a preferred solution of the device for rapid determination of volatile organic compounds in river sediments described in the present invention, the determination storage cylinder is threadedly connected to the top of the ventilation chamber, which facilitates disassembly, assembly and cleaning of the determination storage cylinder.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model cooperates with the storage cylinder, the electric heating rod, the fresh air blower and the storage grille to quickly replace the sediment to be tested after the sediment sampling is completed. At the same time, the fresh air blower is used to quickly update the air inside the material box and the equipment, effectively reducing the impact on subsequent sediment samples and greatly improving the sampling and measurement efficiency of volatile organic compounds in river sediments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:

[0016] Figure 1 This is a schematic diagram of the appearance of a device for rapid determination of volatile organic compounds in river sediments according to the present invention;

[0017] Figure 2 This is a schematic diagram of the interior of a material box of a device for rapidly determining volatile organic compounds in river sediments according to the present invention;

[0018] Figure 3 This is a schematic diagram of the first piston of a device for rapidly determining volatile organic compounds in river sediments according to the present invention;

[0019] Figure 4 This is a schematic diagram of a water collection tank of a device for rapid determination of volatile organic compounds in river sediments according to the present invention;

[0020] Figure 5 The utility model is a schematic diagram of a measuring storage cylinder of a device for quickly measuring volatile organic compounds in river sediments.

[0021] Legend: 1. Material box; 2. Box door; 3. Electric push rod; 4. First piston; 5. Limiting frame; 6. Storage grille; 7. Slide rail; 8. Track pulley; 9. Equipment rack; 10. Electric heating rod; 11. Water collection tank; 12. Ventilation chamber; 13. Air valve; 14. Fresh air fan; 15. Measurement storage cylinder; 16. Cylinder cover; 17. Cylinder; 18. Second piston; 19. Sampling adapter. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0025] See also Figure 1-5 The present invention provides a rapid determination device for volatile organic compounds in river sediments, comprising a material box 1, a door 2 provided on one side of the material box 1, an electric push rod 3 embedded and fixedly connected at the center of the bottom of the material box 1, and a first piston 4 fixedly connected to the telescopic end of the electric push rod 3. The first piston 4 is tightly fitted to the inner wall of the material box 1. The first piston 4 is raised and lowered within the material box 1 to compress the air pressure within the box, facilitating the sampling and detection of volatile organic gases. Limiting brackets 5 corresponding to the first piston 4 are fixedly connected to the inner wall of the material box 1 around the periphery of the material box 1 to facilitate limiting the travel of the first piston 4.

[0026] A storage grille 6 is provided near the top of the material box 1. Slide rails 7 are fixedly connected to both sides of the inner wall of the material box 1. Track pulleys 8 corresponding to the slide rails 7 are connected to bearings on both sides of the storage grille 6, which makes it convenient for auxiliary staff to take out and reinstall the storage grille 6 to replace the river sediment.

[0027] An equipment rack 9 is fixedly connected to the side of the inner wall of the material box 1 away from the box door 2, and an electric heating rod 10 is fixedly connected to the side of the equipment rack 9 close to the middle of the material box 1. There are several electric heating rods 10, and the several electric heating rods 10 are evenly distributed at the bottom of the storage grid 6, which is convenient for heating the sediment. Under constant temperature conditions, the volatile organic matter in the sediment can be better volatilized into gas.

[0028] A water collecting trough 11 is fixedly connected to the bottom of the equipment frame 9. The two sides of the water collecting trough 11 are inclined. The top surface of the water collecting trough 11 is provided with mirror stainless steel. When the electric heating rod 10 is heated, it is convenient to gather heat and output the heat upward as much as possible to act on the sediment on the storage grille 6.

[0029] A ventilation chamber 12 is provided on the top of the material box 1, and air valves 13 are provided at both ends of the ventilation chamber 12. A fresh air fan 14 is fixedly connected to one side of the air valve 13, and one of the two air valves 13 is connected to the exhaust end of the fresh air fan 14. When the experiment is completed, the air valves 13 on both sides are opened and the fresh air fan 14 is started at the same time to facilitate the replacement of the gas in the material box 1, thereby reducing the impact on subsequent measurements.

[0030] A measurement storage cylinder 15 is installed on top of the ventilation chamber 12. This is threadedly connected to the top of the ventilation chamber 12, making it easy to remove, assemble, and clean. A cylinder cap 16 is installed on top of the measurement storage cylinder 15. A cylinder 17 is fixedly connected to the top of the cap. The telescopic end of the cylinder 17 passes through the cap 16 and is fixedly connected to a second piston 18. A sampling adapter 19 is installed on one side of the top of the measurement storage cylinder 15.

[0031] When in use, the electric push rod 3, the electric heating rod 10 and the fresh air blower 14 are connected to the external power supply, the river sediment to be measured is placed in the storage grid 6, and it is slid into the material box 1 along the slide rail 7 and the box door 2 is closed.

[0032] The electric heating rod 10 is started to heat the sediment, causing the volatile organic compounds in the sediment to volatilize and rise to the measurement storage cylinder 15. The number of measurement storage cylinders 15 used can be controlled according to the measurement needs. When ready to be used, the second piston 18 in the measurement storage cylinder 15 is located at the top of the measurement storage cylinder 15. At this time, gas can enter the measurement storage cylinder 15. The organic matter can be sampled from the sampling adapter 19 through the sampler, and then the concentration and content of the volatile organic compounds therein are measured using a chromatograph, and finally the volatile organic compound content in the river sediment is calculated by reverse calculation.

[0033] For the unused measurement storage cylinder 15, the second piston 18 is located at the bottom, which seals the measurement storage cylinder 15 and prevents gas from entering. After the batch of sediment measurements is completed, the measurement storage cylinder 15 can be quickly replaced for subsequent measurements.

[0034] After sampling is completed, the sediment is taken out and the fresh air fan 14 and the air valves 13 on both sides are opened at the same time to quickly update the air in the material box 1 and the equipment. The ventilation time is calculated and set according to the wind force and the sediment content.

[0035] The stroke of the electric push rod 3 in this device, the heating temperature of the electric heating rod 10 and the start and stop of the fresh air blower 14 can all be achieved through external PLC programming. This is existing technology and will not be described in detail here.

[0036] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A rapid determination device for volatile organic compounds in river sediments, comprising a material box (1), characterized in that: A box door (2) is provided on one side of the material box (1), an electric push rod (3) is embedded and fixedly connected at the center of the bottom of the material box (1), and the telescopic end of the electric push rod (3) is fixedly connected to the first piston (4), and a storage grille (6) is provided near the top of the material box (1), and an equipment rack (9) is fixedly connected to the side of the inner wall of the material box (1) away from the box door (2), and an electric heating rod (10) is fixedly connected to the side of the equipment rack (9) near the middle of the material box (1), and a water collecting tank (11) is fixedly connected to the bottom of the equipment rack (9). ) is provided with a ventilation chamber (12) at the top, air valves (13) are provided at both ends of the ventilation chamber (12), a fresh air blower (14) is fixedly connected to one side of the air valve (13), a measuring storage cylinder (15) is provided at the top of the ventilation chamber (12), a cylinder cover (16) is provided at the top of the measuring storage cylinder (15), a cylinder (17) is fixedly connected to the top of the cylinder cover (16), the telescopic end of the cylinder (17) passes through the cylinder cover (16) and is fixedly connected to a second piston (18), and a sampling adapter (19) is provided on one side of the top of the measuring storage cylinder (15).

2. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: The first piston (4) is tightly fitted to the inner wall of the material box (1), and a limiting frame (5) corresponding to the first piston (4) is fixedly connected to the inner wall of the material box (1) around its periphery.

3. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: Slide rails (7) are fixedly connected to both sides of the inner wall of the material box (1), and track pulleys (8) corresponding to the slide rails (7) are bearing-connected to both sides of the storage grid (6).

4. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: A plurality of the electric heating rods (10) are provided, and the plurality of the electric heating rods (10) are evenly distributed at the bottom of the storage grid (6).

5. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: Both sides of the water collecting tank (11) are arranged at an angle, and the top surface of the water collecting tank (11) is provided with mirror-finished stainless steel.

6. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: One of the two air valves (13) is connected to the exhaust end of the fresh air blower (14).

7. The device for rapid determination of volatile organic compounds in river sediments according to claim 1, characterized in that: The measuring storage cylinder (15) is threadedly connected to the top of the ventilation chamber (12).

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