Closed sampling device for sewage containing hydrogen sulfide

Abstract

The utility model discloses a hydrogen sulfide-containing sewage closed sampling device which comprises a main body, the main body is of a tank-shaped structure, a limiting pipe is arranged in the main body, the limiting pipe and the main body are coaxially arranged, an annular cavity structure is formed between the main body and the limiting pipe, and the limiting pipe is arranged in the annular cavity structure. An annular piston is movably arranged in the annular cavity structure, a liquid inlet pipe is arranged on the lower side wall of the main body in a penetrating mode, a tail gas treatment mechanism is arranged in the limiting pipe, and an air inlet pipe communicating with the tail gas treatment mechanism is arranged on the outer surface of the upper end of the limiting pipe; the tail gas treatment mechanism is arranged in the limiting pipe, so that the equipment integration degree is high, leaked trace hydrogen sulfide gas enters the tail gas treatment mechanism in the limiting pipe to be treated, gas leakage is prevented, the annular piston is adopted, the piston does not deviate when moving in the main body, and the gas leakage is prevented. And the space occupied by the equipment is inconvenient, so that the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, specifically a closed sampling device for wastewater containing hydrogen sulfide. Background Technology

[0002] Industrial wastewater generated during the production of hydrogen sulfide-containing gas fields contains a large amount of dissolved hydrogen sulfide gas. Currently, when sampling hydrogen sulfide-containing wastewater, plastic buckets and other samplers are mostly used in open-air manual sampling. Sampling personnel need to wear air respirators to prevent the release of hydrogen sulfide during sampling, which could harm their health. Because the air respirators are quite heavy, it is inconvenient and unsafe for sampling personnel to operate under this load. Furthermore, during open sampling, factors such as hydrogen sulfide volatilization and oxygen exposure not only cause environmental pollution but also cause changes in the hydrogen sulfide content in the wastewater sample, affecting the effectiveness of the sampling and the accuracy of the testing.

[0003] Patent application 201310202725.4 discloses a lightweight, sealed sampling container, comprising a switch, piston, sealing ring, cylinder liner, pressure cap, pull rod, and handle. In use, the sampled liquid-gas mixture pushes the piston, forcing air out of the cylinder liner through a vent on the pressure cap and into the cylinder liner. The switch is then closed, creating a sealed chamber. The wellhead sampling valve is then closed, and the sampling container is removed, achieving sealed sampling. However, this type of device cannot measure the sample volume, temperature, or other technical parameters on-site, and lacks a treatment device for potentially harmful exhaust gases generated during sampling.

[0004] Patent number CN203941032U, entitled "A Closed Sampling Device for Wastewater Containing Hydrogen Sulfide," discloses an apparatus in which an air inlet valve with a quick connector is provided on the upper part of the sampling tank and can be connected to an absorption bottle through a pipeline. This apparatus can prevent environmental pollution and changes in hydrogen sulfide content caused by the volatilization or exposure to oxygen in the wastewater sample, thus ensuring the representativeness and validity of the sample. However, the apparatus has a low degree of integration, making it inconvenient to use.

[0005] To address this, a closed sampling device for hydrogen sulfide-containing wastewater is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a closed sampling device for wastewater containing hydrogen sulfide, so as to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a closed sampling device for hydrogen sulfide-containing wastewater, comprising a main body, the main body having a tank-like structure, a limiting tube disposed inside the main body, the limiting tube being coaxially disposed with the main body, an annular cavity structure being formed between the main body and the limiting tube, an annular piston being movably disposed inside the annular cavity structure, a liquid inlet pipe being disposed through the lower side wall of the main body, an exhaust gas treatment mechanism being disposed inside the limiting tube, and an air inlet pipe communicating with the exhaust gas treatment mechanism being disposed on the upper outer surface of the limiting tube.

[0008] According to the above technical solution, the exhaust gas treatment mechanism includes a bottle body, the upper end of the limiting tube is open, and the limiting tube is fixedly connected through the upper side wall of the main body. The bottle body is inserted from the top of the limiting tube. The inside of the bottle body is filled with exhaust gas treatment solution. A connecting tube is provided through the bottom of the bottle body and is connected to the air inlet pipe.

[0009] According to the above technical solution, a bottle cap is screwed to the upper end of the bottle body, and a venting groove is provided through the end face of the bottle cap. A filter screen is fixedly connected to the inner surface of the venting groove.

[0010] According to the above technical solution, the inner circumferential surfaces of the two ends of the intake pipe are respectively fixedly connected to limit rings, and a valve core is movably arranged between the limit rings. An elastic element is arranged between the valve core and the limit rings. An annular groove is provided on the inner circumferential surface of the intake pipe, and a through hole corresponding to the annular groove is provided through the side wall of the valve core.

[0011] According to the above technical solution, a connecting pipe is provided inside the side wall of the limiting tube. One end of the connecting pipe is connected to the air inlet pipe, and the other end of the connecting pipe is located at the bottom of the limiting tube and inserted into the connecting pipe. A push rod for abutting the valve core is fixedly connected inside the connecting pipe.

[0012] According to the above technical solution, a fixing ring is fixedly connected to the upper surface of the main body corresponding to the outer side of the bottle cap. The inner circumferential surface of the fixing ring is provided with an internal thread, and the outer circumferential surface of the bottle cap is provided with an external thread that is screwed into the fixing ring.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model has a main body with a limiting tube inside the main body, a movable annular piston between the main body and the limiting tube, and a liquid inlet pipe at the bottom of the main body for sampling. By setting a tail gas treatment mechanism inside the limiting tube, the device has a high degree of integration. The leaked trace amounts of hydrogen sulfide gas enter the tail gas treatment mechanism inside the limiting tube for treatment, preventing gas leakage. Moreover, the use of an annular piston prevents displacement when the piston moves inside the main body, and the space occupied by the device is inconvenient, making it more convenient to use. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of the bottle body of this utility model;

[0017] Figure 3 This is a schematic diagram of the bottle structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the annular piston structure of this utility model;

[0019] Figure 5 yes Figure 1 Enlarged structural diagram at point A in the middle;

[0020] In the diagram: 1-Main body, 2-Limiting tube, 3-Annular piston, 4-Liquid inlet tube, 5-Air inlet tube, 6-Bottle body, 7-Connecting tube, 8-Bottle cap, 9-Ventilation groove, 10-Filter screen, 11-Limiting ring, 12-Valve core, 13-Annular groove, 14-Through hole, 15-Connecting tube, 16-Top rod, 17-Fixing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a closed sampling device for wastewater containing hydrogen sulfide, comprising a main body 1, as shown in the figure. Figure 1 As shown, the main body 1 has a can-shaped structure. A limiting tube 2 is installed inside the main body 1, and the limiting tube 2 is coaxially arranged with the main body 1. An annular cavity structure is formed between the main body 1 and the limiting tube 2. An annular piston 3 is movably installed inside the annular cavity structure. Figure 1 As shown, the inner wall of the annular piston 3 is fitted with the limiting tube 2, and the outer wall is fitted with the inner wall of the main body 1, achieving a seal. Under the action of the fiber tube 2, the annular piston 3 can move smoothly inside the main body 1, as shown. Figure 4As shown, the outer and inner circumferential surfaces of the annular piston 3 are coaxially provided with annular grooves, and sealing rings are fixedly connected to the inner surfaces of the annular grooves respectively. The lower side wall of the main body 1 is provided with a liquid inlet pipe 4, and a valve (not shown in the figure) is provided on the liquid inlet pipe 4. The liquid inlet pipe 4 is connected to the sampling pipeline. By opening the valve, under pressure, the sample enters the interior of the main body 1 through the liquid inlet pipe 4. The sample fills the space between the main body 1 and the limiting pipe 2, pushing the annular piston 3 upward to achieve sampling. The limiting pipe 2 is provided with a tail gas treatment mechanism inside. The upper outer surface of the limiting pipe 2 is provided with an air inlet pipe 5 that is connected to the tail gas treatment mechanism. The leaked gas enters the tail gas treatment mechanism through the air inlet pipe 5 for treatment to prevent the leaked gas from flowing out.

[0023] Specifically, the exhaust gas treatment mechanism includes a bottle body 6, such as Figure 2 As shown, the bottle body 6 is cylindrical, the upper end of the limiting tube 2 is open, and the limiting tube 2 is fixedly connected through the upper side wall of the main body 1. The bottle body 6 is inserted from the top of the limiting tube 2. The bottle body 6 is filled with a tail gas treatment solution, which can be an alkaline solution. A connecting tube 7 is provided through the bottom of the bottle body 6. The connecting tube 7 is connected to the air inlet pipe 5. The leaked gas can enter the bottle body 6 through the air inlet pipe 5. After the gas enters from the bottom, it comes into contact with the alkaline solution to complete the treatment of the leaked gas.

[0024] Specifically, a bottle cap 8 is screwed to the upper end of the bottle body 6. A ventilation groove 9 is provided through the end face of the bottle cap 8. A filter screen 10 is fixedly connected to the inner surface of the ventilation groove 9. The filter screen 10 prevents foreign objects from entering the interior of the bottle body 6 and contaminating the exhaust gas treatment solution. The bottle cap 8 is detachable, which makes it convenient to replace the alkaline solution inside the bottle body 6.

[0025] Specifically, the inner circumferential surfaces of both ends of the air inlet pipe 5 are fixedly connected to limiting rings 11, and a valve core 12 is movably arranged between the limiting rings 11. The end of the valve core 12 away from the bottle body 6 is closed. An elastic element, which can be a spring, is provided between the valve core 12 and the limiting ring 11. Under the action of the elastic element, the valve core 12 tends to move away from the bottle body 6 and makes close contact with the limiting ring 11 away from the bottle body 6 to form a seal. The inner circumferential surface of the air inlet pipe 5 is provided with an annular groove 13, and the side wall of the valve core 12 is provided with a through hole 14 corresponding to the annular groove 13. Thus, when the bottle body 6 is not inserted into the limiting pipe 2, the bottom of the bottle body 6 is in a closed state under the action of the elastic element. At this time, an alkaline solution can be filled into the bottle body 6.

[0026] Specifically, a connecting pipe 15 is provided inside the side wall of the limiting tube 2. One end of the connecting pipe 15 is connected to the air intake pipe 5, and the other end of the connecting pipe 15 is located at the bottom of the limiting tube 2 and inserted into the connecting pipe 7. A push rod 16 for abutting against the valve core 12 is fixedly connected inside the connecting pipe 15. Figure 1 As shown, when the bottle body 6 is inserted from the top of the limiting tube 2, the push rod 16 pushes up the valve core 12, so that the valve core 12 overcomes the elastic element and disengages from the limiting ring 11. At this time, the gas entering through the air inlet pipe 5 is injected into the connecting pipe 7 through the connecting pipe 15. The gas enters the through hole 14 through the annular groove 11 and finally enters the interior of the bottle body 6 to mix with the alkaline solution.

[0027] Specifically, a fixing ring 17 is fixedly connected to the upper surface of the main body 1 corresponding to the outer side of the bottle cap 8. The inner circumferential surface of the fixing ring 17 is provided with an internal thread, and the outer circumferential surface of the bottle cap 8 is provided with an external thread that is screwed into the fixing ring 17. After the bottle body 6 is inserted into the limiting tube 2, under the action of the elastic element, the bottle body 6 will have a tendency to move along the line. The bottle cap 8 is screwed into the fixing ring 17 to fix the bottle body 6.

[0028] When using the equipment, after connecting the inlet pipe 4 to the sampling line, open the valve. Under pressure, the sample is injected into the main body 1 through the inlet pipe 4. The annular piston 3 moves upward under pressure. The leaked gas enters the connecting pipe 15 through the air inlet pipe 5, and enters the bottle body 6 through the annular groove 13 and the through hole 14, where it comes into contact with the alkaline solution. After the bottle body 6 is pulled out through the limiting pipe 2, the valve core 12 contacts the limiting ring 11 under the action of the elastic element to form a seal, and the solution inside the bottle body 6 will not leak.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A closed sampling device for hydrogen sulfide-containing wastewater, comprising a main body (1), characterized in that: The main body (1) is in the form of a can. A limiting tube (2) is arranged inside the main body (1). The limiting tube (2) is arranged coaxially with the main body (1). An annular cavity structure is formed between the main body (1) and the limiting tube (2). An annular piston (3) is movably arranged inside the annular cavity structure. A liquid inlet pipe (4) is provided through the lower side wall of the main body (1). An exhaust gas treatment mechanism is arranged inside the limiting tube (2). An intake pipe (5) connected to the exhaust gas treatment mechanism is provided on the outer surface of the upper end of the limiting tube (2).

2. A closed sampling device for hydrogen sulfide-containing wastewater according to claim 1, characterized in that: The exhaust gas treatment mechanism comprises a bottle body (6), the upper end of the limiting tube (2) is open, and the limiting tube (2) passes through the upper side wall of the main body (1) and is fixedly connected, the bottle body (6) is inserted from the top of the limiting tube (2), the interior of the bottle body (6) is filled with an exhaust gas treatment solution, and a connecting tube (7) is provided through the bottom of the bottle body (6), and the connecting tube (7) is connected to the intake pipe (5).

3. A closed sampling device for hydrogen sulfide-containing wastewater according to claim 2, characterized in that: A bottle cap (8) is screwed onto the upper end of the bottle body (6); a ventilation groove (9) is provided through the end surface of the bottle cap (8); and a filter screen (10) is fixedly connected to the inner surface of the ventilation groove (9).

4. A closed sampling device for hydrogen sulfide-containing wastewater according to claim 3, characterized in that: The inner circumferences of both ends of the air intake pipe (5) are respectively fixedly connected to limit rings (11), and a valve core (12) is movably arranged between the limit rings (11), an elastic element is arranged between the valve core (12) and the limit rings (11), the inner circumference of the air intake pipe (5) is provided with an annular groove (13), and a through hole (14) corresponding to the annular groove (13) is arranged through the side wall of the valve core (12).

5. A closed sampling device for hydrogen sulfide-containing wastewater according to claim 4, characterized in that: A connecting pipe (15) is provided inside the side wall of the position limiting pipe (2), one end of the connecting pipe (15) is connected to the air inlet pipe (5), the other end of the connecting pipe (15) is located at the bottom of the position limiting pipe (2) and inserted into the connecting pipe (7), and a push rod (16) for resisting the valve core (12) is fixedly connected inside the connecting pipe (15).

6. A closed sampling device for hydrogen sulfide-containing wastewater according to claim 5, characterized in that: A fixing ring (17) is fixedly connected to the upper surface of the main body (1) corresponding to the outer side of the bottle cap (8); the inner peripheral surface of the fixing ring (17) is provided with an internal thread; and the outer peripheral surface of the bottle cap (8) is provided with an external thread that is threadedly connected to the fixing ring (17).

Images