Hydrogen sulfide detection device

Abstract

The present invention discloses a hydrogen sulfide detection device, comprising a reaction cell and a colorimetric cell. The reaction cell has a chamber, an air inlet, a liquid inlet, and a liquid outlet. The air inlet, the liquid inlet, and the liquid outlet are all connected to the chamber. The air inlet is adapted to admit hydrogen sulfide gas, and the liquid inlet is adapted to admit a reaction liquid, so that the reaction liquid and hydrogen sulfide react in the chamber to form a Schiff base complex. The colorimetric cell is connected to the liquid outlet, so that the Schiff base complex flowing out of the liquid outlet flows into the colorimetric cell for photometric detection. The hydrogen sulfide detection device of the present invention has a simple structure, low cost, and accurate detection results.

Description

Technical Field

[0001] The present invention relates to the field of toxic gas detection, and in particular to a hydrogen sulfide detection device. Background Art

[0002] Hydrogen sulfide is a gaseous pollutant and a key monitoring target in my country's ambient air quality standards. Hydrogen sulfide is acidic and can corrode the interior walls of natural gas transportation pipelines. It is also a major cause of acid rain pollution, and long-term exposure to it can harm the human respiratory tract and nervous system. Therefore, accurate measurement of hydrogen sulfide plays a vital role in both the ecological environment and human health.

[0003] In the related art, the detection results of hydrogen sulfide are inaccurate and have large errors. Summary of the Invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] Related technologies for determining hydrogen sulfide include chromatography, silver sulfide colorimetry, lead acetate test paper, gas tube detection, and methylene blue colorimetry. Among these, methylene blue colorimetry is the most widely used method and is suitable for detecting hydrogen sulfide in the air. The specific operating procedures for measuring hydrogen sulfide using methylene blue spectrophotometry are as follows: ① Hydrogen sulfide in the air is absorbed by an alkaline cadmium hydroxide suspension, forming a cadmium sulfide precipitate; ② Polyvinyl alcohol ammonium phosphate is added to the absorption solution to reduce the photodecomposition of cadmium sulfide; ③ In a sulfuric acid solution, hydrogen sulfide reacts with a p-aminodimethylaniline solution and a ferric chloride solution to produce methylene blue, which is then measured using a spectrophotometer based on the color depth. While methylene blue spectrophotometry offers high sensitivity for hydrogen sulfide determination, it suffers from poor stability and large errors.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present invention provides a hydrogen sulfide detection device with convenient detection, high sensitivity, high stability and high accuracy.

[0008] According to an embodiment of the present invention, a hydrogen sulfide detection device includes: a reaction cell, the reaction cell having a chamber, an air inlet, a liquid inlet and a liquid outlet, the air inlet, the liquid inlet and the liquid outlet are all connected to the chamber, the air inlet is suitable for introducing hydrogen sulfide gas, the reaction cell has a first reaction state and a second reaction state, in the first reaction state, a first reaction liquid is added to the liquid inlet, and the first reaction liquid and the hydrogen sulfide gas react to generate a Schiff base complex, in the second reaction state, a second reaction liquid is added to the liquid inlet, and the second reaction liquid reacts with the Schiff base complex to generate a Schiff base colored complex; a colorimetric cell, the colorimetric cell is connected to the liquid outlet, so that the Schiff base complex flowing out through the liquid outlet flows into the colorimetric cell for photometric detection.

[0009] The hydrogen sulfide detection device of the embodiment of the present invention is provided with a reaction cell and a colorimetric cell. The reaction liquid and hydrogen sulfide gas are chemically reacted in the reaction cell to generate a Schiff base colored complex. The absorbance of the Schiff base colored complex is utilized in the colorimetric cell, thereby improving the sensitivity and accuracy of the detection results.

[0010] In some embodiments, the hydrogen sulfide detection device further includes a flow detection component, which is connected to the air inlet of the reaction tank to detect the flow of hydrogen sulfide flowing into the reaction tank.

[0011] In some embodiments, the hydrogen sulfide detection device further includes a liquid quantitative component, which is connected to the liquid inlet to detect the liquid level in the reaction tank.

[0012] In some embodiments, the hydrogen sulfide detection device further includes a stirring component, which is disposed in the reaction tank to stir the reaction liquid in the reaction tank.

[0013] In some embodiments, the hydrogen sulfide detection device also includes: a first pump, which is connected to the air inlet of the reaction tank so that the hydrogen sulfide gas is pumped into the reaction tank through the first pump; and a second pump, which is connected to the liquid inlet of the reaction tank so that the reaction liquid is pumped into the reaction tank through the second pump.

[0014] In some embodiments, the hydrogen sulfide detection device further includes a waste liquid pool, which is connected to the colorimetric cell so that the waste liquid flowing out of the colorimetric cell flows into the waste liquid pool.

[0015] In some embodiments, the hydrogen sulfide detection device further includes a third pump, which is connected to the colorimetric cell and the waste liquid tank respectively, so that the waste liquid in the colorimetric cell flows into the waste liquid tank through the third pump.

[0016] In some embodiments, the hydrogen sulfide detection device further comprises a multi-way valve group, the multi-way valve group is connected to the liquid inlet of the reaction tank, the multi-way valve group comprises a first sub-valve, a second sub-valve, a third sub-valve and a fourth sub-valve, the first sub-valve is suitable for passing zinc acetate solution, the second sub-valve is suitable for passing formaldehyde solution, the third sub-valve is suitable for passing aniline solution, the fourth sub-valve is suitable for passing ammonium thiocyanate solution, the multi-way valve group has a first state, a second state, a third state and a fourth state, in the first state, the first sub-valve is opened so that the zinc acetate solution flows into the reaction tank so that the zinc acetate solution and the sulfur in the reaction tank are mixed. In the second state, the second sub-valve is opened to allow the formaldehyde solution to flow into the reaction tank so that the formaldehyde solution reacts with the zinc sulfide to form a hydrogen sulfide adduct. In the third state, the third sub-valve is opened to allow the aniline solution to flow into the reaction tank so that the aniline solution reacts with the hydrogen sulfide in the reaction tank to form a weakly stable Schiff base. In the fourth state, the fourth sub-valve is opened to allow the ammonium thiocyanate solution to flow into the reaction tank so that the ammonium thiocyanate solution reacts with the Schiff base in the reaction tank and the zinc ions and the ammonium thiocyanate to form a Schiff base colored complex.

[0017] In some embodiments, the multi-way valve group further includes a fifth sub-valve, which is suitable for introducing a cleaning liquid. The cleaning liquid flows into the reaction tank through the fifth sub-valve to clean the reaction tank.

[0018] In some embodiments, the hydrogen sulfide detection device also includes: a first connecting valve, which is respectively connected to the multi-way valve group and the liquid inlet of the reaction tank, so that the first connecting valve controls the disconnection and connection of the multi-way valve group and the reaction tank; a second connecting valve, one end of the second connecting valve is connected to the air inlet of the reaction tank, and the other end of the second connecting valve is suitable for connecting to the air inlet pipe, so that the second connecting valve controls the disconnection and connection of the flow into the reaction tank and the air inlet pipe; a third connecting valve, which is respectively connected to the liquid outlet of the reaction tank and the colorimetric cell, so as to control the connection and disconnection of the reaction tank and the colorimetric cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2 is a schematic structural diagram of a hydrogen sulfide detection device according to an embodiment of the present invention.

[0020] Hydrogen sulfide detection device 100;

[0021] Reaction pool 1; colorimetric pool 2; flow detection component 3; liquid quantitative component 4; stirring component 5; first pump 6; second pump 7; waste liquid pool 8; third pump 9; multi-way valve group 10; first sub-valve 101; second sub-valve 102; third sub-valve 103; fourth sub-valve 104; fifth sub-valve 105; first connecting valve 11; second connecting valve 12; third connecting valve 13; air inlet pipe 14; liquid inlet pipe 15. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0023] The following describes a hydrogen sulfide detection device according to an embodiment of the present invention with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the hydrogen sulfide detection device according to an embodiment of the present invention includes a reaction cell 1 and a colorimetric cell 2.

[0025] The reaction tank 1 has a chamber (not shown in the figure), an air inlet (not shown in the figure), a liquid inlet (not shown in the figure) and a liquid outlet (not shown in the figure). The air inlet, the liquid inlet and the liquid outlet are all connected to the chamber. The air inlet is suitable for introducing hydrogen sulfide gas. The reaction tank 1 has a first reaction state and a second reaction state. In the first reaction state, a first reaction liquid is added to the liquid inlet, and the first reaction liquid and the hydrogen sulfide gas react to form a Schiff base complex. In the second reaction state, a second reaction liquid is added to the liquid inlet, and the second reaction liquid reacts with the Schiff base complex to form a Schiff base colored complex.

[0026] Specifically, if Figure 1 As shown, the air inlet and the liquid inlet are both provided at the top of the reaction tank 1, and the liquid outlet is provided adjacent to the bottom of the reaction tank 1. The air inlet pipe 14 is connected to the air inlet of the reaction tank 1, so that the hydrogen sulfide gas flows into the reaction tank 1 through the air inlet pipe 14 and the liquid inlet. The liquid inlet pipe 15 is connected to the liquid inlet of the reaction tank 1, so that the first reaction liquid and the second reaction liquid flow into the chamber. In the first reaction state, the first reaction liquid is added to the reaction tank 1 so that the first reaction liquid reacts with the hydrogen sulfide gas in the reaction tank 1 to generate a Schiff base complex. In the second reaction state, the second reaction liquid is added to the reaction tank 1 so that the second reaction liquid reacts with the Schiff base complex in the reaction tank 1 to generate a Schiff base colored complex.

[0027] The colorimetric cell 2 is connected to the liquid outlet so that the Schiff base complex flowing out of the liquid outlet flows into the colorimetric cell 2 for photometric detection. Figure 1As shown, the inlet of the colorimetric cell 2 is connected to the liquid outlet of the reaction cell 1, so that the Schiff base colored complex generated in the reaction cell 1 flows into the colorimetric cell 2. Since the Schiff base complex has high sensitivity and accuracy when determining the target substance by spectrophotometry, this characteristic of the Schiff base complex is utilized to generate a highly stable Schiff base colored complex. The Schiff base colored complex has a very stable absorbance at 500 nm, and the color development system is stable for 60 minutes. Therefore, the absorbance of the Schiff base colored complex in the colorimetric cell 2 can be measured by a photoelectric sensor. The concentration of the hydrogen sulfide gas to be measured is determined by measuring the absorbance of the final Schiff base colored complex.

[0028] The hydrogen sulfide detection device 100 of an embodiment of the present invention is provided with a reaction cell 1 and a colorimetric cell 2. The reaction liquid and hydrogen sulfide gas are chemically reacted with the first reaction liquid and the second reaction liquid in the reaction cell 1 to generate a Schiff base colored complex, and the absorbance of the Schiff base colored complex is utilized in the colorimetric cell 2, thereby improving the sensitivity and accuracy of the detection results, while avoiding the operational errors caused by manual measurement of hydrogen sulfide, making the detection of hydrogen sulfide more convenient.

[0029] In some embodiments, the hydrogen sulfide detection device 100 further includes a flow detection component 3, which is connected to the air inlet of the reaction tank 1 to detect the flow of hydrogen sulfide flowing into the reaction tank 1. Specifically, Figure 1 As shown, the flow detection component 3 is a flow detector, which is arranged in the air inlet pipe 14, so as to detect the flow of hydrogen sulfide gas in the air inlet pipe 14 through the flow detector, thereby controlling the amount of hydrogen sulfide gas flowing into the reaction tank 1.

[0030] In some embodiments, the hydrogen sulfide detection device 100 further includes a liquid quantitative component 4, which is connected to the liquid inlet to detect the liquid level in the reaction tank 1. Specifically, Figure 1 As shown, the liquid dosing component 4 is a liquid doser, one end of which is connected to the liquid inlet of the reactor, and the other end of the liquid doser is connected to the liquid inlet pipe 15, so that the volume of the reaction liquid flowing into the reaction tank 1 is detected by the liquid doser, and the volume of the reaction liquid in the reaction tank 1 is controlled.

[0031] It is understandable that the liquid dosing device measures the liquid level height of various reaction liquids entering the reaction tank 1 through a photoelectric sensor. This is a prior art and will not be described in detail in the present invention.

[0032] In some embodiments, the hydrogen sulfide detection device 100 further includes a stirring component 5, which is disposed in the reaction tank 1 to stir the reaction liquid in the reaction tank 1. Specifically, Figure 1As shown, the stirring component 5 is a magnetic stirrer, which is arranged in the chamber and located at the bottom of the reaction tank 1. When the reaction liquid and hydrogen sulfide gas flow into the reaction tank 1, the reaction liquid in the reaction tank 1 can be stirred, thereby improving the reaction efficiency and reducing the reaction time.

[0033] In some embodiments, the hydrogen sulfide detection device 100 further includes a first pump 6 and a second pump 7 .

[0034] The first pump 6 is connected to the air inlet of the reaction tank 1 so as to pump the hydrogen sulfide gas into the reaction tank 1 through the first pump 6. Specifically, Figure 1 As shown, the first pump 6 is a vacuum pump, the inlet of the vacuum pump is connected to the air inlet pipe 14, and the outlet of the vacuum pump is connected to the air inlet of the reaction tank 1. The first pump 6 provides power for the hydrogen sulfide gas, thereby pumping the hydrogen sulfide gas into the reaction tank 1 through the vacuum pump.

[0035] The second pump 7 is connected to the liquid inlet of the reaction tank 1 so that the reaction liquid is pumped into the reaction tank 1 through the second pump 7. Specifically, Figure 1 As shown, the second pump 7 is a peristaltic pump, which is connected to the liquid inlet of the liquid quantitative component 4 and the reaction tank 1 respectively, so that the reaction liquid is pumped into the reaction tank 1 through the peristaltic pump. When the liquid level in the reaction tank 1 reaches a preset value, the liquid quantitative component 4 will issue an alarm or the liquid quantitative component 4 will control the peristaltic pump to stop working through the controller.

[0036] In some embodiments, the hydrogen sulfide detection device 100 further includes a waste liquid pool 8, which is connected to the colorimetric pool 2 so that the waste liquid flowing out of the colorimetric pool 2 flows into the waste liquid pool 8. Specifically, Figure 1 As shown, the inlet of the waste liquid pool 8 is connected to the outlet of the colorimetric pool 2 through a pipeline, thereby the waste liquid after the photometric detection flows into the waste liquid pool 8, thereby emptying the waste liquid in the colorimetric pool 2 to prepare for the next detection.

[0037] In some embodiments, the hydrogen sulfide detection device 100 further includes a third pump 9, which is connected to the colorimetric cell 2 and the waste liquid tank 8, respectively, so that the waste liquid in the colorimetric cell 2 flows into the waste liquid tank 8 through the third pump 9. Specifically, Figure 1 As shown, the third pump 9 is a peristaltic pump, the inlet of the peristaltic pump is connected to the outlet of the colorimetric cell 2, and the outlet of the peristaltic pump is connected to the inlet of the waste liquid tank 8, so that the peristaltic pump provides kinetic energy for the waste liquid, and the waste liquid in the colorimetric cell 2 is pumped into the waste liquid tank 8, and the Schiff base colored complex in the reaction tank 1 can also be pumped into the colorimetric cell 2.

[0038] In some embodiments, the hydrogen sulfide detection device 100 further includes a multi-way valve group 10, which is connected to the liquid inlet of the reaction tank 1. The multi-way valve group 10 includes a first sub-valve 101, a second sub-valve 102, a third sub-valve 103 and a fourth sub-valve 104. The first sub-valve 101 is suitable for passing zinc acetate solution, the second sub-valve 102 is suitable for passing formaldehyde solution, the third sub-valve 103 is suitable for passing aniline solution, and the fourth sub-valve 104 is suitable for passing ammonium thiocyanate solution. Specifically, Figure 1 As shown, the first sub-valve 101, the second sub-valve 102, the third sub-valve 103 and the fourth sub-valve 104 are all connected to the liquid inlet pipe 15, so that the zinc acetate solution flows into the liquid inlet pipe 15 through the first sub-valve 101, the formaldehyde solution flows into the liquid inlet pipe 15 through the second sub-valve 102, the aniline solution flows into the liquid inlet pipe 15 through the third sub-valve 103, and the ammonium thiocyanate solution flows into the liquid inlet pipe 15 through the fourth sub-valve 104.

[0039] In some embodiments, the multi-way valve group 10 has a first state, a second state, a third state and a fourth state. In the first state, the first sub-valve 101 is opened so that the zinc acetate solution flows into the reaction tank 1 so that the zinc acetate solution reacts with the hydrogen sulfide in the reaction tank 1 to generate zinc sulfide. In the second state, the second sub-valve 102 is opened so that the formaldehyde solution flows into the reaction tank 1 so that the formaldehyde solution reacts with the zinc sulfide to generate a hydrogen sulfide adduct. In the third state, the third sub-valve 103 is opened so that the aniline solution flows into the reaction tank 1 so that the aniline solution reacts with the hydrogen sulfide in the reaction tank 1 to generate a weakly stable Schiff base. In the fourth state, the fourth sub-valve 104 is opened so that the ammonium thiocyanate solution flows into the reaction tank 1 so that the ammonium thiocyanate solution reacts with the Schiff base in the reaction tank 1 and the zinc ions and ammonium thiocyanate to generate a Schiff base colored complex.

[0040] Specifically, the first reaction liquid is zinc acetate solution, formaldehyde solution, and pararosaniline solution, and the second reaction liquid is ammonium thiocyanate solution. The first state is the first step, the first sub-valve 101 is opened, the second sub-valve 102, the third sub-valve 103 and the fourth sub-valve 104 are closed, and the zinc acetate solution flows into the reaction tank 1 through the first sub-valve 101 and reacts with the hydrogen sulfide in the reaction tank 1 to generate zinc sulfide.

[0041] The second state is the second step, opening the second sub-valve 102, closing the first sub-valve 101, the third sub-valve 103 and the fourth sub-valve 104, allowing the formaldehyde solution to flow into the reaction tank 1 through the second sub-valve 102 and react with the zinc sulfide generated by the reaction to form a sulfur-hydrogen adduct.

[0042] The third state is the third step, in which the third sub-valve 103 is opened, and the first sub-valve 101, the second sub-valve 102 and the fourth sub-valve 104 are closed. The aniline solution flows into the reaction tank 1 through the third sub-valve 103 and reacts with the generated sulfhydryl adduct to generate a weakly stable Schiff base.

[0043] The fourth state is the fourth step, in which the fourth sub-valve 104 is opened, and the first sub-valve 101, the second sub-valve 102, and the third sub-valve 103 are closed, so that the mixed solution of ammonium thiocyanate and gelatin flows into the reaction tank 1 and the ammonium thiocyanate reacts with the Schiff base and the zinc ions in the reaction tank 1 with the ammonium thiocyanate to form a Schiff base colored complex. Thus, through the first state, the second state, the third state, and the fourth state, the zinc acetate solution, the formaldehyde solution, the pararosaniline solution, and the ammonium thiocyanate solution are sequentially added to the reaction tank 1 for reaction, thereby avoiding mutual influence among the zinc acetate solution, the formaldehyde solution, the pararosaniline solution, and the ammonium thiocyanate solution, and ensuring the reaction efficiency of the Schiff base colored complex.

[0044] It is worth noting that the zinc ions in the reaction tank 1 are zinc ions in zinc acetate, and the role of gelatin can prevent precipitation in the reaction solution, thereby ensuring the accuracy of the detection results.

[0045] In some embodiments, the multi-way valve assembly 10 further includes a fifth sub-valve 105, which is adapted to allow a cleaning liquid to flow into the reaction tank 1 through the fifth sub-valve 105, so as to clean the reaction tank 1. Specifically, Figure 1 As shown, the fifth sub-valve 105 is connected to the liquid inlet pipe 15. After the photometric detection of the Schiff base complex in the colorimetric cell 2 is completed, the fifth sub-valve 105 is opened, so that the cleaning liquid flows into the liquid inlet pipe 15, the reaction cell 1 and the colorimetric cell 2 in sequence, thereby cleaning the liquid inlet pipe 15, the reaction cell 1 and the colorimetric cell 2, and the liquid after cleaning flows into the waste liquid tank 8, ensuring the cleanliness of the liquid inlet pipe 15, the reaction cell 1 and the colorimetric cell 2, so as to ensure the accuracy of the next test result.

[0046] In some embodiments, the hydrogen sulfide detection device 100 further includes a first connecting valve 11 , a second connecting valve 12 , and a third connecting valve 13 .

[0047] The first connecting valve 11 is connected to the liquid inlet of the multi-way valve group 10 and the reaction tank 1 respectively, so that the first connecting valve 11 controls the disconnection and connection of the multi-way valve group 10 and the reaction tank 1. Specifically, Figure 1 As shown, the first connecting valve 11 can be a two-way valve, the inlet of the first connecting valve 11 is connected to the multi-way valve group 10 through the liquid inlet pipe 15, and the outlet of the first connecting valve 11 is connected to the liquid inlet of the reaction tank 1 through the liquid inlet pipe 15. Therefore, the first connecting valve 11 can control the connection and disconnection between the multi-way valve group 10 and the reaction tank 1, thereby controlling the volume of the reaction liquid flowing into the reaction tank 1.

[0048] One end of the second connecting valve 12 is connected to the air inlet of the reaction pool 1, and the other end of the second connecting valve 12 is adapted to be connected to the air inlet pipe 14, so that the second connecting valve 12 controls the disconnection and connection of the air flowing into the reaction pool 1 and the air inlet pipe 14. Specifically, Figure 1As shown, the second connecting valve 12 is an air intake valve. The inlet of the second connecting valve 12 is connected to the outlet of the first pump 6 through the air intake pipe 14, and the outlet of the second connecting valve 12 is connected to the air intake of the reaction tank 1 through the air intake pipe 14. Thus, the second connecting valve 12 can control the on-off between the first pump 6 and the reaction tank 1, thereby controlling the volume of hydrogen sulfide gas flowing into the reaction tank 1.

[0049] The third connecting valve 13 is connected to the liquid outlet of the reaction cell 1 and the colorimetric cell 2 respectively, so as to control the connection and disconnection of the reaction cell 1 and the colorimetric cell 2. Figure 1 As shown, the third connecting valve 13 is a two-way valve, the inlet of the third connecting valve 13 is connected to the liquid outlet of the reaction tank 1 through a pipeline, and the outlet of the third connecting valve 13 is connected to the inlet of the colorimetric cell 2 through a pipeline. Thus, the third connecting valve 13 can control the connection between the reaction tank 1 and the colorimetric cell 2, thereby controlling the volume of the Schiff base colored complex flowing into the colorimetric cell 2.

[0050] The working process of the hydrogen sulfide detection device 100 according to the embodiment of the present invention is as follows:

[0051] The hydrogen sulfide gas enters the reaction tank 1 through the flow detection component 3 and the first pump 6, and the flow detection component 3 is used to control the flow rate of hydrogen sulfide;

[0052] The second pump 7 pumps the zinc acetate solution into the liquid quantitative component 4 through the multi-way valve group 10 for quantitative determination, and then enters the reaction tank 1 through the first connecting valve 11 to react with the hydrogen sulfide gas to fix the hydrogen sulfide;

[0053] A mixture of formaldehyde solution, aniline solution, gelatin solution and ammonium thiocyanate enters reaction tank 1 in the same manner as the zinc acetate solution, reacts with the fixed hydrogen sulfide to form a Schiff base complex with high stability and characteristic wavelength;

[0054] After the Schiff base complex is stabilized for 5 minutes, the final reaction solution in the reaction cell 1 is pumped into the colorimetric cell 2 by the third pump 9 for photometric measurement;

[0055] After the colorimetric reaction is completed, the third pump 9 is started to push the reaction solution into the waste liquid tank 8;

[0056] The second pump 7 and the third pump 9 drive the cleaning liquid (distilled water) to clean the liquid quantitative component 4 , the reaction tank 1 , the pipeline and the colorimetric cell 2 , and push the cleaned waste water into the waste liquid tank 8 .

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydrogen sulfide detection device, characterized in that: include: A reaction pool, wherein the reaction pool has a chamber, an air inlet, a liquid inlet and a liquid outlet, wherein the air inlet, the liquid inlet and the liquid outlet are all connected to the chamber, and the air inlet is suitable for introducing hydrogen sulfide gas. The reaction tank has a first reaction state and a second reaction state. In the first reaction state, a first reaction liquid is added to the liquid inlet, and the first reaction liquid reacts with the hydrogen sulfide gas to generate a Schiff base complex. In the second reaction state, a second reaction liquid is added to the liquid inlet, and the second reaction liquid reacts with the Schiff base complex to generate a Schiff base colored complex. a colorimetric cell, the colorimetric cell being in communication with the liquid outlet so that the Schiff base complex flowing out of the liquid outlet flows into the colorimetric cell for photometric detection; A multi-way valve group, the multi-way valve group is connected to the liquid inlet of the reaction tank, the multi-way valve group includes a first sub-valve, a second sub-valve, a third sub-valve and a fourth sub-valve, the first sub-valve is suitable for passing zinc acetate solution, the second sub-valve is suitable for passing formaldehyde solution, the third sub-valve is suitable for passing aniline solution, and the fourth sub-valve is suitable for passing ammonium thiocyanate solution. The multi-way valve group has a first state, a second state, a third state and a fourth state. In the first state, the first sub-valve is opened so that the zinc acetate solution flows into the reaction tank so that the zinc acetate solution reacts with the hydrogen sulfide in the reaction tank to generate zinc sulfide. In the second state, the second sub-valve is opened so that the formaldehyde solution flows into the reaction tank so that the formaldehyde solution reacts with the zinc sulfide to generate a hydrogen sulfide adduct. In the third state, the third sub-valve is opened so that the aniline solution flows into the reaction tank so that the aniline solution reacts with the hydrogen sulfide in the reaction tank to generate a weakly stable Schiff base. In the fourth state, the fourth sub-valve is opened so that the ammonium thiocyanate solution flows into the reaction tank so that the ammonium thiocyanate solution reacts with the Schiff base in the reaction tank and the zinc ions and the ammonium thiocyanate to generate a Schiff base colored complex.

2. The hydrogen sulfide detection device according to claim 1, characterized in that: The device also includes a flow detection component, which is connected to the air inlet of the reaction tank to detect the flow of hydrogen sulfide flowing into the reaction tank.

3. The hydrogen sulfide detection device according to claim 1, characterized in that: It also includes a liquid quantitative component, which is connected to the liquid inlet to detect the liquid level in the reaction tank.

4. The hydrogen sulfide detection device according to claim 1, characterized in that: It also includes a stirring component, which is arranged in the reaction tank to stir the reaction liquid in the reaction tank.

5. The hydrogen sulfide detection device according to claim 1, characterized in that: Also includes: a first pump, the first pump being connected to an air inlet of the reaction tank so as to pump the hydrogen sulfide gas into the reaction tank through the first pump; A second pump is connected to the liquid inlet of the reaction tank so as to pump the reaction liquid into the reaction tank through the second pump.

6. The hydrogen sulfide detection device according to claim 1, characterized in that: It also includes a waste liquid tank, which is connected to the colorimetric cell so that the waste liquid flowing out of the colorimetric cell flows into the waste liquid tank.

7. The hydrogen sulfide detection device according to claim 6, characterized in that: The system further comprises a third pump, which is connected to the colorimetric cell and the waste liquid tank respectively, so that the waste liquid in the colorimetric cell flows into the waste liquid tank through the third pump.

8. The hydrogen sulfide detection device according to claim 1, characterized in that: The multi-way valve group further includes a fifth sub-valve, which is suitable for allowing a cleaning liquid to pass through. The cleaning liquid flows into the reaction tank through the fifth sub-valve to clean the reaction tank.

9. The hydrogen sulfide detection device according to claim 1, characterized in that: Also includes: a first connecting valve, the first connecting valve being connected to the liquid inlet of the multi-way valve group and the reaction tank, respectively, so that the first connecting valve controls the disconnection and connection of the multi-way valve group and the reaction tank; a second communication valve, one end of which is in communication with the air inlet of the reaction tank, and the other end of which is adapted to be in communication with the air inlet pipe, so that the second communication valve controls the disconnection and connection of air flowing into the reaction tank and the air inlet pipe; A third connecting valve is connected to the liquid outlet of the reaction cell and the colorimetric cell respectively, so as to control the connection and disconnection between the reaction cell and the colorimetric cell.

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