Device for analyzing purity of hydrogen sulfide in mixed gas

Abstract

The utility model discloses a device for analyzing the purity of hydrogen sulfide in mixed gas, which comprises a first absorption tank, a gas inlet pipe, a gas outlet pipe, a first flowmeter and a second flowmeter, the first absorption tank is provided with a first liquid storage cavity, and a first absorption liquid for absorbing hydrogen sulfide is stored in the first liquid storage cavity; the gas inlet pipe extends into the first absorption liquid, the gas inlet pipe is used for inputting mixed gas into the first absorption tank, the gas outlet pipe is communicated with the space, located above the first absorption liquid, of the first liquid storage cavity, the first flow meter is arranged on the gas inlet pipe, and the second flow meter is arranged on the gas outlet pipe. The device for analyzing the purity of the hydrogen sulfide in the mixed gas not only can accurately detect the purity of the hydrogen sulfide in the mixed gas, but also is simple in structure, low in manufacturing cost and better in safety during detection.

Description

Technical Field

[0001] The utility model relates to the technical field of gas purity detection, in particular to a purity analysis device for hydrogen sulfide in mixed gas. Background Art

[0002] Hydrogen sulfide is an inorganic substance that can be used to prepare sulfuric acid and sulfur. In addition, it is widely used in various industries, such as chemical analysis, metal refinement, pesticide preparation, plasma etching and heavy metal wastewater treatment. However, when the purity of hydrogen sulfide in the mixed gas mixed with hydrogen sulfide reaches the set range, it is easy to explode. Therefore, it is particularly important to accurately detect the purity of hydrogen sulfide in the mixed gas.

[0003] In the prior art, detection is generally performed using a hydrogen sulfide detector, but the hydrogen sulfide detector is not only complex in structure and expensive, but also workers may inhale hydrogen sulfide when holding the hydrogen sulfide detector for detection, which has poor safety. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a purity analysis device for hydrogen sulfide in a mixed gas, which can not only accurately detect the purity of hydrogen sulfide in the mixed gas, but also has a simple structure, low cost, and better safety during detection.

[0005] According to an embodiment of the utility model, a purity analysis device for hydrogen sulfide in a mixed gas includes a first absorption tank, an air inlet pipe, an air outlet pipe, a first flow meter and a second flow meter. The first absorption tank has a first liquid storage chamber, and the first liquid storage chamber stores a first absorption liquid for absorbing hydrogen sulfide. The air inlet pipe extends into the first absorption liquid. The air inlet pipe is used to input the mixed gas into the first absorption tank. The air outlet pipe is connected to the space of the first liquid storage chamber above the first absorption liquid. The first flow meter is arranged on the air inlet pipe, and the second flow meter is arranged on the air outlet pipe.

[0006] The device for analyzing the purity of hydrogen sulfide in mixed gas according to the embodiment of the utility model has at least the following beneficial effects:

[0007] In the utility model, the mixed gas mixed with hydrogen sulfide is input into the first liquid storage chamber of the first absorption tank through the air inlet pipe, the hydrogen sulfide in the mixed gas is absorbed by the first absorption liquid, and the gas after the hydrogen sulfide is removed is discharged through the air outlet pipe. The first flow meter can measure the volume V1 of the mixed gas entering the first absorption tank through the air inlet pipe within a period of time, and the second flow meter can measure the volume V2 of the gas after the hydrogen sulfide is removed and discharged through the air outlet pipe within a period of time, and then the purity of hydrogen sulfide in the mixed gas is W(H2S)%=(V1-V2) / V1%. According to the purity analysis device for hydrogen sulfide in mixed gas of the utility model embodiment, not only can the purity of hydrogen sulfide in the mixed gas be accurately detected, but also the structure is simple and the cost is low. In addition, the staff does not need to contact the hydrogen sulfide, and the safety is better during the detection.

[0008] According to some embodiments of the utility model, the device for analyzing the purity of hydrogen sulfide in a mixed gas also includes a second absorption tank and a connecting pipe, the second absorption tank has a second liquid storage chamber, the second liquid storage chamber stores a second absorption liquid for absorbing hydrogen sulfide, one end of the connecting pipe is connected to the space of the first liquid storage chamber above the first absorption liquid, the other end of the connecting pipe extends into the second absorption liquid, and the gas outlet pipe is connected to the space of the second liquid storage chamber above the second absorption liquid.

[0009] According to some embodiments of the utility model, a first filling port is provided at the top of the first absorption tank, a first sealing plug is provided in the first filling port, the first sealing plug is provided with a first through hole penetrating from top to bottom, and the air inlet pipe is passed through the first through hole.

[0010] According to some embodiments of the utility model, a second filling port is provided at the top of the second absorption tank, a second sealing plug is provided in the second filling port, the second sealing plug is provided with a second through hole penetrating from top to bottom, and the connecting pipe is passed through the second through hole.

[0011] According to some embodiments of the present invention, the first absorption liquid is set to a sodium hydroxide solution; and / or the second absorption liquid is set to a sodium hydroxide solution.

[0012] According to some embodiments of the present invention, the first flow meter is configured as a rotor flow meter; and / or the second flow meter is configured as a rotor flow meter.

[0013] According to some embodiments of the utility model, the air intake pipe is provided with a regulating valve, and the first flow meter is located between the regulating valve and the first absorption tank.

[0014] According to some embodiments of the utility model, the device for analyzing the purity of hydrogen sulfide in a mixed gas also includes a gas collecting bottle, which is used to store the mixed gas. The gas inlet pipe is connected to the gas collecting bottle, and the gas collecting bottle is connected to a gas supply pipe, which inputs the mixed gas into the gas collecting bottle.

[0015] According to some embodiments of the utility model, the gas collecting bottle is provided with a ventilation pipe, and the ventilation pipe is provided with a first stop valve. The device for analyzing the purity of hydrogen sulfide in a mixed gas also includes a nitrogen displacer connected to the gas collecting bottle, and the nitrogen displacer is used to input nitrogen into the gas collecting bottle so that the air in the gas collecting bottle is discharged from the ventilation pipe.

[0016] According to some embodiments of the utility model, a hose is connected between the gas collecting bottle and the air inlet pipe.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a device for analyzing the purity of hydrogen sulfide in a mixed gas according to the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure after adding a gas collecting bottle and a nitrogen displacer.

[0021] Figure Number:

[0022] First absorption tank 100; first liquid storage chamber 101; first absorption liquid 102; first sealing plug 103;

[0023] Intake pipe 200; regulating valve 201; hose 202;

[0024] Exhaust pipe 300;

[0025] A first flow meter 400;

[0026] A second flow meter 500;

[0027] Second absorption tank 600; second liquid storage chamber 601; second absorption liquid 602; second sealing plug 603;

[0028] Connecting pipe 700;

[0029] Gas collecting bottle 800; gas delivery pipe 801; ventilation pipe 802; first stop valve 803; second stop valve 804; third stop valve 805;

[0030] Nitrogen displacer 900. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference below Figure 1 and Figure 2 A device for analyzing the purity of hydrogen sulfide in a mixed gas according to an embodiment of the utility model is described.

[0036] like Figure 1 and Figure 2 As shown, the device for analyzing the purity of hydrogen sulfide in a mixed gas according to an embodiment of the utility model includes a first absorption tank 100, an air inlet pipe 200, an air outlet pipe 300, a first flow meter 400 and a second flow meter 500.

[0037] The first absorption tank 100 has a first liquid storage chamber 101, in which a first absorption liquid 102 for absorbing hydrogen sulfide is stored. Specifically, the first absorption liquid 102 is configured to absorb hydrogen sulfide but cannot absorb other gases in the mixed gas, such as hydrogen and oxygen.

[0038] The air inlet pipe 200 can be connected to the first absorption tank 100, and the air outlet end of the air inlet pipe 200 can extend into the first absorption liquid 102. The air inlet pipe 200 is used to input the mixed gas into the first absorption tank 100. Since the air inlet pipe 200 extends into the first absorption liquid 102, the mixed gas can be fully contacted with the first absorption liquid 102, so that the first absorption liquid 102 can absorb hydrogen sulfide better.

[0039] The air outlet pipe 300 is connected to the space of the first liquid storage chamber 101 located above the first absorption liquid 102. Specifically, the air outlet pipe 300 can be indirectly connected to the first liquid storage chamber 101 through other connecting structures, or the air outlet pipe 300 can be directly connected to the first liquid storage chamber 101. The connecting position between the air outlet pipe 300 and the first liquid storage chamber 101 is located above the first absorption liquid 102. After the hydrogen sulfide in the mixed gas is absorbed by the first absorption liquid 102, it flows out of the first absorption liquid 102, and then enters the air outlet pipe 300 and is discharged through the air outlet pipe 300.

[0040] The first flow meter 400 is provided at the intake pipe 200. The first flow meter 400 can measure the volume of the mixed gas entering the first absorption tank 100 through the intake pipe 200 within a period of time, and the volume can be defined as V1. In order to prevent the first flow meter 400 from being corroded by hydrogen sulfide, the contact part between the first flow meter 400 and the intake pipe 200 can be made of anti-corrosion material.

[0041] The second flow meter 500 is disposed on the gas outlet pipe 300 , and the second flow meter 500 can measure the volume of the gas after hydrogen sulfide is removed and discharged through the gas outlet pipe 300 within a period of time, and the volume can be defined as V2 .

[0042] In the utility model, the mixed gas mixed with hydrogen sulfide is input into the first liquid storage chamber 101 of the first absorption tank 100 through the air inlet pipe 200, the hydrogen sulfide in the mixed gas is absorbed by the first absorption liquid 102, and the gas after removing the hydrogen sulfide is discharged through the air outlet pipe 300. The first flow meter 400 can measure the volume V1 of the mixed gas entering the first absorption tank 100 through the air inlet pipe 200 within a period of time, and the second flow meter 500 can measure the volume V2 of the gas after removing the hydrogen sulfide and discharged through the air outlet pipe 300 within a period of time, and then the purity of hydrogen sulfide in the mixed gas is W(H2S)%=(V1-V2) / V1%.

[0043] The device for analyzing the purity of hydrogen sulfide in a mixed gas according to the embodiment of the utility model can not only accurately detect the purity of hydrogen sulfide in the mixed gas, but also has a simple structure and low cost. In addition, workers do not need to come into contact with hydrogen sulfide, and the safety during detection is better.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the device for analyzing the purity of hydrogen sulfide in a mixed gas further includes a second absorption tank 600 and a connecting pipe 700 .

[0045] For example, the second absorption tank 600 has a second liquid storage chamber 601, and the second absorption liquid 602 for absorbing hydrogen sulfide is stored in the second liquid storage chamber 601. The type of the second absorption liquid 602 can be the same as the first absorption liquid 102, or the type of the second absorption liquid 602 can be different from the first absorption liquid 102. One end of the connecting pipe 700 can be connected to the first absorption tank 100 and communicate with the space of the first liquid storage chamber 101 located above the first absorption liquid 102. Specifically, the first absorption tank 100 can be provided with a first connecting hole, which is connected to the first liquid storage chamber 101 and located above the first absorption liquid 102. The connecting pipe 700 can be connected to the first connecting hole or penetrated through the first connecting hole. The other end of the connecting pipe 700 can be connected to the second absorption tank 600 and extend into the second absorption liquid 602. The air outlet pipe 300 is connected to the space of the second liquid storage chamber 601 located above the second absorption liquid 602. Specifically, the second absorption tank 600 can be provided with a second connecting hole, which is connected to the second liquid storage chamber 601 and is located above the second absorption liquid 602. The air outlet pipe 300 can be connected to the second connecting hole or pass through the second connecting hole.

[0046] After the first absorption liquid 102 in the first absorption tank 100 absorbs hydrogen sulfide, some hydrogen sulfide may still remain in the gas, which may lead to inaccurate hydrogen sulfide purity analysis. In this embodiment, a second absorption tank 600 and a connecting pipe 700 are provided to further remove the residual hydrogen sulfide, thereby making the hydrogen sulfide purity analysis more accurate and more practical.

[0047] It should be noted that more absorption tanks may be arranged with reference to the arrangement of the second absorption tank 600 to further improve the accuracy of the hydrogen sulfide purity analysis.

[0048] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the top of the first absorption tank 100 is provided with a first filling port, the first filling port is provided with a first sealing plug 103, the first sealing plug 103 is provided with a first through hole running through from top to bottom, and the end of the air inlet pipe 200 close to the first absorption tank 100 extends downward to penetrate the first through hole and extend into the first absorption liquid 102. In this embodiment, the first sealing plug 103 is provided, the sealing effect is better, and the air inlet pipe 200 extends downward to penetrate the first through hole and extend into the first absorption liquid 102, which can prevent the first absorption liquid 102 from flowing back into the air inlet pipe 200, and the practicality is better.

[0049] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the second absorption tank 600 is provided with a second filling port at the top thereof, a second sealing plug 603 is provided in the second filling port, the second sealing plug 603 is provided with a second through hole running through from top to bottom, and the end of the connecting pipe 700 close to the second absorption tank 600 extends downward to penetrate the second through hole and extend into the second absorption liquid 602. In this embodiment, the second sealing plug 603 is provided, the sealing effect is better, and the connecting pipe 700 extends downward to penetrate the second through hole and extend into the second absorption liquid 602, which can prevent the second absorption liquid 602 from flowing back into the connecting pipe 700, and the practicality is better.

[0050] In some embodiments of the utility model, the first absorption liquid 102 is set to a sodium hydroxide solution. In this embodiment, the first absorption liquid 102 is set to a sodium hydroxide solution, which is a strong base, and the hydrogen sulfide solution is acidic, so that the two can undergo an acid-base neutralization reaction, thereby being able to absorb hydrogen sulfide, and the absorption effect is good. In addition, the reaction between the two produces water and sodium sulfide, and does not produce gas, thereby not affecting the accuracy of the hydrogen sulfide purity analysis. Finally, the sodium hydroxide solution will not absorb gases such as hydrogen and oxygen in the mixed gas, thereby not affecting the accuracy of the hydrogen sulfide purity analysis, and is a more preferred first absorption liquid 102.

[0051] It should be noted that the second absorption liquid 602 may also be a sodium hydroxide solution. In addition, the first absorption liquid 102 and the second absorption liquid 602 may also be other solutions, for example, a copper sulfate solution.

[0052] In some embodiments of the present invention, the first flowmeter 400 is configured as a rotor flowmeter. The rotor flowmeter has a simple structure, is easy to install, has high precision, a wide measurable flow range, and can measure the total amount of gas within a set time. It is a more preferred flowmeter.

[0053] It should be noted that the second flowmeter 500 may also be a rotor flowmeter. In addition, the first flowmeter 400 and the second flowmeter 500 may also be other suitable flowmeters, for example, differential pressure flowmeters.

[0054] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the air inlet pipe 200 is provided with a regulating valve 201, and the first flowmeter 400 is located between the regulating valve 201 and the first absorption tank 100. The regulating valve 201 is provided to adjust the input flow rate of the mixed gas according to actual needs, so that the mixed gas enters the first absorption tank 100 and the second absorption tank 600 at a lower flow rate, so as to avoid the mixed gas input being too fast, resulting in the first absorption liquid 102 and the second absorption liquid 602 not having enough time to completely absorb hydrogen sulfide, thereby making the first absorption liquid 102 and the second absorption liquid 602 absorb hydrogen sulfide better, thereby making the hydrogen sulfide purity analysis more accurate.

[0055] In some embodiments of the present invention, Figure 2 As shown, the purity analysis device for hydrogen sulfide in mixed gas also includes a gas collecting bottle 800 and a gas delivery pipe 801. The gas collecting bottle 800 is used to store the mixed gas. The gas inlet pipe 200 is connected to the gas collecting bottle 800. The gas delivery pipe 801 is connected to the gas collecting bottle 800 to input the mixed gas into the gas collecting bottle 800. In this embodiment, the collected mixed gas can be input into the gas collecting bottle 800 through the gas delivery pipe 801 for storage. When the purity of hydrogen sulfide needs to be detected, the gas collecting bottle 800 can input the mixed gas into the first absorption tank 100 and the second absorption tank 600 through the gas inlet pipe 200. Compared with the need to collect the mixed gas while testing the purity of hydrogen sulfide, the operation is more convenient and the detection efficiency is higher.

[0056] In some embodiments of the present invention, Figure 2 As shown, the gas collecting bottle 800 is provided with a ventilation pipe 802, and the ventilation pipe 802 is provided with a first stop valve 803. The device for analyzing the purity of hydrogen sulfide in the mixed gas also includes a nitrogen displacer 900, which is connected to the gas collecting bottle 800. The nitrogen displacer 900 is used to input nitrogen into the gas collecting bottle 800 so that the air in the gas collecting bottle 800 is discharged from the ventilation pipe 802. Since there is air in the gas collecting bottle 800 at the beginning, if the mixed gas is directly input into the gas collecting bottle 800, the mixed gas is mixed with the air in the gas collecting bottle 800, which can easily change the purity ratio of hydrogen sulfide to oxygen. When the purity ratio of hydrogen sulfide to oxygen reaches the set range, it is easy to explode, and the safety is very poor.

[0057] In this embodiment, a nitrogen displacer 900 is also provided. The nitrogen displacer 900 can input nitrogen into the gas collecting bottle 800. The nitrogen can squeeze the air in the gas collecting bottle 800 from the ventilation pipe 802, so that the gas collecting bottle 800 can be filled with nitrogen. After that, the mixed gas is passed into the gas collecting bottle 800, which can avoid explosion caused by changing the purity ratio of hydrogen sulfide and oxygen, and is safer.

[0058] It should be noted that a nitrogen detector can be provided in the gas collecting bottle 800. When the mixed gas is introduced, the mixed gas first discharges the nitrogen in the gas collecting bottle 800 from the ventilation pipe 802. When the nitrogen detector detects that the nitrogen in the gas collecting bottle 800 has been discharged, the first stop valve 803 can be closed, and then the mixed gas can enter the first absorption tank 100 and the second absorption tank 600 through the intake pipe 200. In addition, when nitrogen and mixed gas are input into the gas collecting bottle 800, the regulating valve 201 needs to be closed to prevent nitrogen and mixed gas from directly entering the intake pipe 200. In addition, a second stop valve 804 can be provided between the nitrogen displacer 900 and the gas collecting bottle 800. When the mixed gas is input into the gas collecting bottle 800, the second stop valve 804 is closed to prevent the mixed gas from entering the nitrogen displacer 900. In addition, a third stop valve 805 may be provided on the gas delivery pipe 801. When nitrogen is input into the gas collection bottle 800, the third stop valve 805 is closed to prevent nitrogen from being discharged into the mixed gas collection device through the gas delivery pipe 801. In addition, the nitrogen displacer 900 is a very common device, and its structure and working principle are not described in detail here.

[0059] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, a hose 202 is connected between the gas collecting bottle 800 and the air inlet pipe 200. In this embodiment, the hose 202 is provided, which not only facilitates the connection between the air inlet pipe 200 and the gas collecting bottle 800, but also facilitates the placement of the gas collecting bottle 800 in different suitable positions, and has good practicality.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A device for analyzing the purity of hydrogen sulfide in a mixed gas, characterized in that: include: A first absorption tank having a first liquid storage cavity, wherein a first absorption liquid for absorbing hydrogen sulfide is stored in the first liquid storage cavity; an air inlet pipe extending into the first absorption liquid, the air inlet pipe being used to input a mixed gas into the first absorption tank; an air outlet pipe, communicating with the space of the first liquid storage chamber above the first absorption liquid; A first flow meter, disposed in the air intake pipe; The second flow meter is arranged on the air outlet pipe.

2. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to claim 1, characterized in that: The device for analyzing the purity of hydrogen sulfide in the mixed gas also includes: A second absorption tank having a second liquid storage cavity, wherein the second liquid storage cavity stores a second absorption liquid for absorbing hydrogen sulfide; a connecting tube, one end of which is in communication with the space of the first liquid storage chamber above the first absorption liquid, and the other end of which extends into the second absorption liquid; The air outlet pipe is communicated with the space of the second liquid storage chamber above the second absorption liquid.

3. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to claim 1, characterized in that: A first filling port is provided at the top of the first absorption tank, a first sealing plug is provided in the first filling port, a first through hole is provided in the first sealing plug and passes through the first through hole. The air inlet pipe is passed through the first through hole.

4. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to claim 2, characterized in that: The top of the second absorption tank is provided with a second filling port, the second filling port is provided with a second sealing plug, the second sealing plug is provided with a second through hole penetrating from top to bottom, and the connecting pipe is passed through the second through hole.

5. The device for analyzing the purity of hydrogen sulfide in mixed gas according to claim 2, characterized in that: The first absorption liquid is set to a sodium hydroxide solution; and / or, The second absorption liquid is set to be a sodium hydroxide solution.

6. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to any one of claims 1 to 5, characterized in that: The first flow meter is configured as a rotor flow meter; and / or, The second flow meter is configured as a rotor flow meter.

7. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to any one of claims 1 to 5, characterized in that: The air inlet pipe is provided with a regulating valve, and the first flow meter is located between the regulating valve and the first absorption tank.

8. The device for analyzing the purity of hydrogen sulfide in a mixed gas according to any one of claims 1 to 5, characterized in that: The device for analyzing the purity of hydrogen sulfide in the mixed gas also includes: The gas collecting bottle is used to store mixed gas. The gas inlet pipe is connected to the gas collecting bottle. The gas collecting bottle is connected to a gas delivery pipe, and the gas delivery pipe is used to input the mixed gas into the gas collecting bottle.

9. The device for analyzing the purity of hydrogen sulfide in mixed gas according to claim 8, characterized in that: The gas collecting bottle is provided with a gas exchange pipe, and the gas exchange pipe is provided with a first stop valve. The device for analyzing the purity of hydrogen sulfide in the mixed gas also includes: A nitrogen displacer is connected to the gas collecting bottle, and is used to input nitrogen into the gas collecting bottle so that the air in the gas collecting bottle is discharged from the ventilation pipe.

10. The device for analyzing the purity of hydrogen sulfide in mixed gas according to claim 8, characterized in that: A hose is connected between the gas collecting bottle and the air inlet pipe.

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