CN110850024A - Water detection calibration system, detection model establishing method and water detection method - Google Patents
Water detection calibration system, detection model establishing method and water detection method Download PDFInfo
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Abstract
The embodiment of the invention relates to a system for detecting and calibrating moisture in gas containing hydrogen sulfide, a method for establishing a moisture detection model and a moisture detection method; the moisture detection calibration system comprises a wet gas generator containing hydrogen sulfide and a detection and release flow path, wherein the wet gas generator is composed of a humidification flow path, a drying flow path and a hydrogen sulfide flow path which are connected in parallel, and the detection and release flow path is composed of a frost point detection flow path, a moisture detection flow path and a release flow path which are connected in parallel; the humidifying flow path comprises a humidifier, the drying flow path comprises a dryer, and the hydrogen sulfide flow path is used for introducing standard gas containing hydrogen sulfide with known concentration; the frost point detection flow path comprises a dew point meter, the moisture detection flow path comprises a Karl Fischer coulometric moisture titrator, and the vent flow path is used for venting the inlet air. The system can be used for establishing a moisture detection model in the gas containing the hydrogen sulfide, can avoid system errors caused by a correction method when the prior art detects the moisture in the gas containing the hydrogen sulfide, and is simple and easy to implement and accurate in result.
Description
Technical Field
The invention belongs to the technical field of analysis and detection, and particularly relates to a water detection calibration system for detecting water in hydrogen sulfide-containing gas, a method for establishing a water detection model and a water detection method.
Background
In methanol (CH)3OH) as main component in an anhydrous solvent, iodine (I)2) Sulfur dioxide (SO)2) And water (H)2O) according to equation (1) in a stoichiometric ratio of 1: 1. This reaction is known as the karl fischer reaction.
CH3OH+SO2+I2+H2O+3RN→[RNH]SO4CH3+2[RNH]I (1)
In the above formula, RN is an organic base such as imidazole.
The Karl Fischer coulometry generates iodine molecules through an electrolytic reaction to participate in the Karl Fischer reaction, and then calculates the amount of iodine substances through electrolytic electric quantity according to the Faraday law, thereby obtaining the moisture content. The Karl Fischer coulometry is a direct method for detecting moisture, has higher accuracy and sensitivity, and is widely used for detecting the moisture content in solids, liquids and gases.
The defect of the method for detecting the moisture content in the gas containing hydrogen sulfide is illustrated by taking the Karl Fischer coulometry method as an example for detecting the moisture content in natural gas (GB/T18619.1-2002). The hydrogen sulfide in the natural gas can react with iodine molecules generated by electrolysis, so that the water detection result is higher. It is generally believed that hydrogen sulfide and molecular iodine react to form sulfur according to equation (2).
H2S+I2→2HI+S↓ (2)
The national standard GB/T18619.1-2002 stipulates that the content of hydrogen sulfide is known, the system error caused by side reaction is calculated according to the stoichiometric ratio (1: 1) of the reaction of hydrogen sulfide and iodine, and the moisture detection result is corrected. However, the basis of this modification is the mechanism of reaction of hydrogen sulfide and iodine in aqueous solution, and is not applicable to the anhydrous solvent system used for Karl Fischer titration. The hydrogen sulfide-containing gas detected by the correction method has a high moisture content.
Similarly, when the moisture content in the hydrogen sulfide-containing gas is detected by using the karl fischer coulometry method, the system error when the anhydrous solvent system is calculated according to the method has the problem that the detected value of the moisture content is inaccurate.
Disclosure of Invention
In order to solve the technical problem that when the moisture content in the gas containing hydrogen sulfide is detected by using the Karl Fischer coulometry method, the system error is inaccurate when the anhydrous solvent system is calculated by taking the stoichiometric ratio of the reaction of the hydrogen sulfide and the iodine as 1: 1, and the moisture content detection is inaccurate, the embodiment of the invention provides a method for establishing a moisture detection model in the gas containing hydrogen sulfide, which comprises the following steps: s1, detecting the moisture content in a plurality of standard gases to be detected with known hydrogen sulfide concentration by using a Karl Fischer coulometric moisture titrator under the same detection condition under a plurality of preset frost points, detecting the moisture content in the standard gases to be detected by using a first reagent to obtain a moisture detection value x, detecting the moisture content in the standard gases to be detected by using a second reagent to obtain a moisture detection value y, and calculating a moisture standard value z in the standard gases to be detected by using the frost points, wherein the standard gases to be detected consist of hydrogen sulfide, water vapor and pure gases to be detected; s2, a function fitting is performed based on the data points x, y, and z, and a moisture detection model z ═ f (x, y) for detecting the moisture content in the hydrogen sulfide-containing gas is obtained.
Further, the first reagent is Hydranal Coulomat AG Oven coulomb method anolyte and Hydranal coulomb CG coulomb method catholyte; the second reagent is sulfur dioxide-free Karl Fischer reagent anode liquid and HydranalCoulomat CG coulomb method cathode liquid.
Further, the sulfur dioxide-free karl fischer reagent anolyte is composed of methanol, imidazole, potassium iodide and trichloroacetic acid, and the mass percentages are 79.02%, 9.52%, 3.31% and 8.15%, respectively.
Further, the Poly2D function z ═ z is adopted0+ax+by+cx2+dy2+ fxy was fitted.
Further, the frost point value is in the range of-60 ℃ to-15 ℃.
Further, the hydrogen sulfide concentration is in a range of 0 to 90 μmol/mol, and the hydrogen sulfide concentration is equal to the amount of hydrogen sulfide substance/the amount of nitrogen gas substance.
The embodiment of the invention also provides a system for detecting and calibrating the moisture in the gas containing the hydrogen sulfide, which comprises a wet gas generator containing the hydrogen sulfide and a detection vent flow path, wherein the wet gas generator containing the hydrogen sulfide and the detection vent flow path are communicated through a main flow path; the wet gas generator containing hydrogen sulfide comprises a humidifying flow path, a drying flow path and a hydrogen sulfide flow path which are connected in parallel; the detection emptying flow path comprises a frost point detection flow path, a moisture detection flow path and an emptying flow path which are connected in parallel; the humidifying flow path comprises a humidifier for humidifying gas, the drying flow path comprises a dryer for drying gas, and the hydrogen sulfide flow path is used for introducing standard gas containing hydrogen sulfide with known concentration; the frost point detection flow path comprises a dew point instrument for detecting the frost point of the intake air, the moisture detection flow path comprises a Karl Fischer coulometric moisture titrator for detecting the moisture content of the intake air, and the emptying flow path is used for emptying the intake air; the standard gas containing hydrogen sulfide with known concentration is formed by mixing hydrogen sulfide and pure gas to be measured.
Furthermore, a molecular sieve is adopted in the drying flow path to dry the gas.
The embodiment of the invention also provides a method for detecting moisture in the gas containing hydrogen sulfide, which comprises the following steps: s1, establishing a moisture detection model by using the method; s2, under the same conditions as the method, detecting the content of moisture in the gas to be detected by a first reagent by using a Karl Fischer coulometric moisture titrator to obtain a moisture detection value x; detecting the moisture content y in the gas to be detected by adopting a second reagent to obtain a moisture detection value y; substituting x and y into the moisture detection model obtained in step S1 to obtain the moisture content.
Further, the hydrogen sulfide-containing gas is hydrogen sulfide-containing nitrogen or hydrogen sulfide-containing methane or hydrogen sulfide-containing natural gas.
The embodiment of the invention has the following beneficial effects: the system for detecting and calibrating the moisture in the hydrogen sulfide-containing gas provided by the embodiment of the invention can be used for establishing the moisture detection model in the hydrogen sulfide-containing gas provided by the embodiment of the invention, can obtain the preferable moisture detection model for detecting the moisture in the hydrogen sulfide-containing gas, is used for detecting the moisture content in the hydrogen sulfide-containing gas, avoids the defect of inaccurate moisture content detection when the system error is calculated when the stoichiometric ratio of the reaction of the hydrogen sulfide and the iodine is 1: 1, and can avoid the system error caused by the used correction method when the moisture content in the hydrogen sulfide-containing gas is detected in the prior art, and is simple and feasible and accurate in result.
Drawings
FIG. 1 is a schematic diagram of a moisture detection calibration system according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a three-dimensional fit of an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. Those skilled in the art will appreciate that the present invention is not limited to the drawings and the following examples.
Example 1 moisture detection calibration System
Referring to fig. 1, the present embodiment proposes a calibration system for detecting moisture in a hydrogen sulfide-containing gas, which includes a hydrogen sulfide-containing wet gas generator 1 and a detection vent flow path 2, the hydrogen sulfide-containing wet gas generator 1 and the detection vent flow path 2 being communicated via a main flow path, the hydrogen sulfide-containing wet gas generator 1 including a humidification flow path 11, a drying flow path 12 and a hydrogen sulfide flow path 13 connected in parallel, the detection vent flow path 2 including a frost point detection flow path 21, a moisture detection flow path 22 and a vent flow path 23 connected in parallel; the humidifying flow path 11 comprises a humidifier 111 and a flowmeter for humidifying gas, the drying flow path 12 comprises a dryer 121 and a flowmeter for drying gas, and the hydrogen sulfide flow path 13 is used for introducing standard gas containing hydrogen sulfide with known concentration and comprises a flowmeter; the frost point detection flow path 21 includes a dew point meter 211 and a flow meter for detecting the frost point of intake air, the moisture detection flow path 22 includes a karl fischer coulometric moisture titrator 221 and a flow meter for detecting the moisture content of intake air, and the vent flow path 23 is used for venting intake air. The flow meter is used for adjusting the gas flow of the corresponding flow path to quantify the gas, and the required mixed gas can be obtained by adjusting the flow of each flow path in the wet gas generator containing the hydrogen sulfide, for example, the humidity of the inlet gas, the content of the hydrogen sulfide in the inlet gas and the like are controlled; the standard gas containing hydrogen sulfide with known concentration is formed by mixing hydrogen sulfide with pure gas to be measured without moisture, and for example, the standard gas can be a mixed gas which is mixed in advance. Each flow path further includes a valve for controlling the opening and closing of the flow path.
The moisture detection calibration system can be used to establish a moisture detection model, for example, in a hydrogen sulfide containing gas. The method of using the moisture detection calibration system will be described below with reference to nitrogen as the gas to be measured.
Introducing pure nitrogen gas flow into a humidifying flow path 11 and a drying flow path 12 respectively to obtain saturated-humidity nitrogen gas flow and dry nitrogen gas flow respectively, and mixing the saturated-humidity nitrogen gas flow and the dry nitrogen gas flow according to a certain proportion by controlling the flow rate to obtain nitrogen gas moisture with target humidity; then mixing with nitrogen containing hydrogen sulfide with known concentration to obtain nitrogen wet gas containing hydrogen sulfide with certain concentration, and regulating the flow rate of nitrogen containing hydrogen sulfide with known concentration to regulate the concentration of hydrogen sulfide in nitrogen wet gas. . The intake air can flow into the detection purge flow path from three flow paths: the air flows into a frost point detection flow path, an air inlet frost point is detected by using a dew point meter, and the detected frost point is used for calculating a moisture standard value; flowing into a water content detection flow path, and detecting the inlet water content by using a Karl Fischer coulometric water content titrator to obtain a water content detection result; flows into the vent flow path. The dew point detection flow path and the emptying flow path are kept in an open state, and the moisture detection flow path is opened when preset conditions are reached, so that moisture detection is carried out, wherein the preset conditions comprise a preset frost point value and a preset concentration of hydrogen sulfide in standard gas.
Preferably, the drying flow path is configured to dry the gas using a molecular sieve.
It can be understood by those skilled in the art that although the present embodiment is described by taking nitrogen as an example, it is obvious that the moisture detection calibration system of the present embodiment is not limited by the kind of the gas to be detected, and the system can also be used for various pure or mixed gases to be detected, such as methane, natural gas, etc.
Embodiment 2 method for establishing moisture detection model
The embodiment provides a method for establishing a moisture detection model in a hydrogen sulfide-containing gas, which comprises the following steps:
s1, detecting the moisture content in a plurality of standard gases to be detected with known hydrogen sulfide concentration by using a Karl Fischer coulometric moisture titrator under the same detection condition under a plurality of preset frost points, detecting the moisture content in the standard gases to be detected by using a first reagent to obtain a moisture detection value x, detecting the moisture content in the standard gases to be detected by using a second reagent to obtain a moisture detection value y, and calculating a moisture standard value z in the standard gases to be detected by using the frost points, wherein the standard gases to be detected consist of hydrogen sulfide, water vapor and pure gases to be detected;
s2, a function fitting is performed based on the data points x, y, and z, and a moisture detection model z ═ f (x, y) for detecting the moisture content in the hydrogen sulfide-containing gas is obtained.
Preferably, the first reagent is Hydranal Coulomat AG Oven coulomb method anolyte and Hydranal coulomb CG coulomb method catholyte; the second reagent is sulfur dioxide-free Karl Fischer reagent anode liquid and HydranalCoulomat CG coulomb method cathode liquid.
Preferably, the sulfur dioxide-free karl fischer reagent anolyte is composed of methanol, imidazole, potassium iodide and trichloroacetic acid, and the mass percentages are 79.02%, 9.52%, 3.31% and 8.15%, respectively.
Preferably, the Poly2D function z ═ z is adopted0+ax+by+cx2+dy2+ fxy was fitted.
Preferably, the frost point value is adjustable within a range of-60 ℃ to-15 ℃, for example, the frost point value is adjusted by adjusting the ratio between the gas to be measured and the dry gas to be measured, wherein the higher the content of the gas to be measured at saturated humidity is, the higher the humidity of the mixed gas after mixing is, the higher the frost point value is.
Preferably, the concentration of hydrogen sulfide is adjustable in the range of 0 to 90 μmol/mol, the concentration of hydrogen sulfide being the amount of hydrogen sulfide species/the amount of nitrogen species.
A preferred method for modeling the detection of moisture in hydrogen sulfide-containing nitrogen using the detection calibration system of example 1 is described below using nitrogen as the gas to be detected.
Reagent:
hydranal Coulomat CG coulometric catholyte, purchased from Sigma-Aldrich;
hydranal Coulomat AG Oven coulometry anolyte (hereinafter referred to as AG Oven reagent);
the sulfur dioxide-free Karl Fischer reagent anolyte (hereinafter referred to as sulfur dioxide-free reagent) is composed of, for example, 79.02%, 9.52%, 3.31% and 8.15% by mass of methanol, imidazole, potassium iodide and trichloroacetic acid;
hydrogen sulfide-containing nitrogen, the hydrogen sulfide content (amount of hydrogen sulfide species/amount of nitrogen species) was rated at 307 μmol/mol.
The calibration model establishing method comprises the following steps:
s1, introducing pure nitrogen into the humidifying flow path and the drying flow path respectively to obtain nitrogen flow and dry nitrogen flow of saturated humidity respectively, mixing the two flows according to a certain proportion to obtain nitrogen moisture of target humidity, and then mixing the nitrogen moisture with the hydrogen sulfide with known concentration to obtain the nitrogen moisture containing the hydrogen sulfide with certain concentration;
s2, flowing hydrogen sulfide-containing nitrogen gas moisture into a frost point detection flow path, indicating the frost point value by a dew point meter, adjusting the frost point value of intake air by adjusting the flow ratio between saturated and humid nitrogen gas and dry nitrogen gas, respectively maintaining the moisture frost point values at-50.5 ℃, -40.4 ℃, -35.5 ℃, -30.5 ℃ and-19.9 ℃, respectively, controlling the concentrations of hydrogen sulfide in nitrogen gas moisture (the amount of hydrogen sulfide substance/the amount of nitrogen gas substance) at 0. mu. mol/mol, 10.45. mu. mol/mol, 26.88. mu. mol/mol, 37.94. mu. mol/mol, 54.42. mu. mol/mol and 86.09. mu. mol/mol, respectively, at each frost point value, and calculating a moisture content standard value z from the frost point value; nitrogen moisture with preset frost point value and hydrogen sulfide concentration flows into a moisture detection flow path for detection, a Karl Fischer coulometer is used for detecting moisture content, and detection parameters are set as follows: the sample amount is 1000 mg; the air inflow is 400 mL/min; initial drift, 2 μ g/min; equilibration time, 200 s; polarization current, 10 μ A; equilibrium potential, 70 mV; the relative termination drift is 3 mu g/min, under the same detection condition, Hydranal Coulomat CG is used as catholyte, AG Oven reagent and the sulfur dioxide-free reagent are respectively used as anolyte to detect the moisture content in the hydrogen sulfide-containing nitrogen moisture, so as to respectively obtain moisture detection values x and y, and the moisture detection result, the relative error and the frost point error are shown in table 1;
and S3, marking all data points (x, y, z) in a three-dimensional rectangular coordinate system, and performing function fitting according to the data points to obtain a detection model z ═ f (x, y), namely a moisture detection model in the hydrogen sulfide-containing nitrogen, wherein the detection model can be used for detecting the moisture content in the hydrogen sulfide-containing nitrogen.
Preferably, the Poly2D function z ═ z is adopted0+ax+by+cx2+dy2+ fxy was fitted.
The preferred moisture detection model fitted using the Poly2D function described above is as follows:
z＝3.8148889+0.8479628x-0.4398076y-0.000022140257x2-0.0007731418y2+0.000074950902xy
referring to fig. 2, the abscissa indicates a moisture measurement value x (moisture measurement value of AG Oven reagent, mg/kg), the ordinate indicates a moisture measurement value y (moisture measurement value of no sulfur dioxide reagent, mg/kg), the ordinate indicates a moisture standard value (mg/kg) calculated using the frost point value, the shadow graph portion indicates a curved surface of the moisture detection model, and it can be seen that most of the data points fall on the curved surface of the moisture detection model, the adjustment determination coefficient (adj.r-Square) of the moisture detection model is 0.9999, and the error of the moisture detection model is relatively small, and is significantly reduced compared with the national standard method.
TABLE 1 Calf-Fischer coulometry results of moisture detection, relative error and frost point error and comparison with the national standard method
The moisture detection model can be used for detecting moisture in nitrogen containing hydrogen sulfide, when detecting nitrogen with unknown hydrogen sulfide content and moisture content, firstly, using Hydranal Coulomat CG as catholyte and AG Oven reagent as anolyte to detect the moisture content x, then replacing the reagents, using Hydranal Coulomat CG as catholyte and a reagent without sulfur dioxide as anolyte to detect the moisture content y, and substituting x and y into the detection model z ═ f (x, y) to obtain a moisture content result of the nitrogen.
For example, when the hydrogen sulfide concentration is 10.45. mu. mol/mol and the frost point value is-51.27 ℃, the moisture content detection value x is 30.10mg/kg, the moisture content detection value y is 13.30mg/kg, and the moisture content is calculated to be 23.36mg/kg and the standard value z of the moisture content is 21.33mg/kg by substituting x and y into the above-mentioned preferred moisture detection model. Compared with the two, the relative error of the detection result is 9.6 percent; after the water content is converted into frost point, the indication error of the frost point is 0.73 ℃. As shown in Table 1, in the preferred embodiment, the concentration of hydrogen sulfide is in the range of 10.45 to 54.42 mu mol/mol, the relative error of water is in the range of-5.2 to 14.9 percent, the error of frost point is in the range of-0.43 to 1.11 ℃, and the accuracy is high.
Therefore, the water detection model is used for detecting water in the nitrogen containing hydrogen sulfide, can avoid system errors caused by a correction method used when detecting water in the gas containing hydrogen sulfide in the prior art, and is simple, convenient and feasible and high in accuracy.
It should be particularly noted that, as those skilled in the art can understand that, in reality, the present specification cannot be exhaustive because the gas to be detected is various, and therefore, the method for establishing the moisture detection model is illustrated by taking nitrogen as the gas to be detected, which is only for better disclosure of the essence of the present invention and does not constitute a limitation to the present invention, and the method can also be applied to other kinds of gases, such as various pure or mixed gases, e.g., methane, natural gas, etc.
Similarly, in the embodiment, each specific parameter value, reagent type, and function type in the method for establishing the moisture detection model are preferred embodiments of the present invention, and do not limit the present invention, and a person skilled in the art may select other specific parameters, reagent types, and function types according to actual situations.
That is, the essence of the present invention is to provide the following method: under the condition of the known moisture frost point value and the known concentration of hydrogen sulfide in nitrogen moisture, two detection reagents are used for obtaining two moisture content detection values and a moisture content standard value obtained by calculating the frost point value by using a Karl Fischer coulometry method, then a moisture detection model is obtained by fitting, and the moisture content in the gas to be detected containing the hydrogen sulfide can be detected by using the moisture detection model. The inventive step of the present invention is firstly embodied in the construction of the above method, and secondly embodied in the selection of the specific parameters, reagent types or function types used in the present embodiment, which are the preferred and inventive solutions with better technical effects by the inventor.
Example 3 method for detecting moisture in Hydrogen sulfide-containing gas
This example proposes a method for detecting moisture in a hydrogen sulfide-containing gas, and the following description will explain a method for detecting moisture in a hydrogen sulfide-containing nitrogen gas using the moisture detection model obtained in example 2, taking nitrogen gas as a gas to be detected as an example.
The method for detecting the moisture in the nitrogen containing the hydrogen sulfide comprises the following steps:
s1, obtaining a moisture detection model by using the method in the embodiment 2;
s2, setting parameters of a Karl Fischer coulometric moisture titrator and various detection parameters are the same as those of the embodiment 2, and under the same detection conditions, detecting the moisture content in the nitrogen containing hydrogen sulfide by taking Hydranal coulometric CG as a catholyte and an AG Oven reagent and a sulfur dioxide-free reagent as anolyte respectively to obtain moisture detection values x and y respectively; the moisture content z is obtained by substituting x and y into the detection model z ═ f (x, y) obtained in step S1.
Those skilled in the art will appreciate that the detection methods of the present invention are equally applicable to other gases, such as methane, natural gas, and various pure or mixed gases. Similarly, the specific parameter values, the reagent types, and the function types in the embodiment are preferred embodiments of the present invention, and do not limit the present invention, and those skilled in the art may select other specific parameters, reagent types, and function types according to actual situations. The inventive idea of the present invention is firstly embodied in the construction of the moisture detection method, and secondly embodied in the specific parameters, types of reagents or types of functions used in the present embodiment, and the selection of these specific parameters, types of reagents or types of functions is an inventive solution with better technical effects that the inventor prefers through creative work.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for establishing a moisture detection model in a hydrogen sulfide-containing gas is characterized by comprising the following steps:
s1, detecting the moisture content in a plurality of standard gases to be detected with known hydrogen sulfide concentration by using a Karl Fischer coulometric moisture titrator under the same detection condition under a plurality of preset frost points, detecting the moisture content in the standard gases to be detected by using a first reagent to obtain a moisture detection value x, detecting the moisture content in the standard gases to be detected by using a second reagent to obtain a moisture detection value y, and calculating a moisture standard value z in the standard gases to be detected by using the frost points, wherein the standard gases to be detected consist of hydrogen sulfide, water vapor and pure gases to be detected;
s2, a function fitting is performed based on the data points x, y, and z, and a moisture detection model z ═ f (x, y) for detecting the moisture content in the hydrogen sulfide-containing gas is obtained.
2. The method for establishing the moisture detection model according to claim 1, wherein the first reagent is Hydranal Coulomat AG Oven coulomb method anode liquid and Hydranal Coulomat CG coulomb method cathode liquid; the second reagent is sulfur dioxide-free Karl Fischer reagent anode liquid and Hydranal Coulomat CG coulomb method cathode liquid.
3. The method for establishing a moisture detection model according to claim 2, wherein the sulfur dioxide-free karl fischer reagent anolyte is composed of methanol, imidazole, potassium iodide and trichloroacetic acid, and the mass percentages are 79.02%, 9.52%, 3.31% and 8.15%, respectively.
4. The method of claim 1, wherein z is a function of Poly2D0+ax+by+cx2+dy2+ fxy was fitted.
5. The method of establishing a moisture detection model according to claim 1, wherein the frost point value is in the range of-60 ℃ to-15 ℃.
6. The method of establishing a moisture detection model according to claim 1, wherein the hydrogen sulfide concentration is in a range of 0 μmol/mol to 90 μmol/mol, and the hydrogen sulfide concentration is equal to an amount of a substance of hydrogen sulfide/an amount of a substance of nitrogen.
7. The system for detecting and calibrating the moisture in the gas containing the hydrogen sulfide is characterized by comprising a wet gas generator containing the hydrogen sulfide and a detection vent flow path, wherein the wet gas generator containing the hydrogen sulfide and the detection vent flow path are communicated through a main flow path; the wet gas generator containing hydrogen sulfide comprises a humidifying flow path, a drying flow path and a hydrogen sulfide flow path which are connected in parallel; the detection emptying flow path comprises a frost point detection flow path, a moisture detection flow path and an emptying flow path which are connected in parallel; the humidifying flow path comprises a humidifier for humidifying gas, the drying flow path comprises a dryer for drying gas, and the hydrogen sulfide flow path is used for introducing standard gas containing hydrogen sulfide with known concentration; the frost point detection flow path comprises a dew point instrument for detecting the frost point of the intake air, the moisture detection flow path comprises a Karl Fischer coulometric moisture titrator for detecting the moisture content of the intake air, and the emptying flow path is used for emptying the intake air; the standard gas containing hydrogen sulfide with known concentration is formed by mixing hydrogen sulfide and pure gas to be measured.
8. The moisture detection calibration system of claim 7, wherein the drying flow path employs a molecular sieve to dry the gas.
9. A method for detecting moisture in a hydrogen sulfide-containing gas, comprising the steps of:
s1, establishing a moisture detection model by using the method of any one of claims 1 to 6;
s2, detecting the content of moisture in the gas to be detected by using a first reagent by using a Karl Fischer coulometric moisture titrator under the same conditions as the method as in one of claims 1 to 6 to obtain a moisture detection value x; detecting the moisture content y in the gas to be detected by adopting a second reagent to obtain a moisture detection value y; substituting x and y into the moisture detection model obtained in step S1 to obtain the moisture content.
10. The moisture detection method according to claim 9, wherein the hydrogen sulfide-containing gas is hydrogen sulfide-containing nitrogen gas or hydrogen sulfide-containing methane or hydrogen sulfide-containing natural gas.
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