Carbon disulfide concentration measurement system and measurement method based on ultraviolet light-induced conversion

Abstract

The application provides a carbon disulfide concentration measurement system and method based on ultraviolet light-induced conversion, and relates to the field of gas concentration detection. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion comprises a stainless steel spiral ventilation pipe, a quartz spiral ventilation pipe, a mercury lamp, a light shield, a temperature control chamber, a deuterium lamp, a first lens, a gas cell, a second lens, an optical fiber, a spectrometer and a computer; the gas inlet of the stainless steel spiral ventilation pipe is used for receiving carbon disulfide gas to be measured, the gas outlet of the stainless steel spiral ventilation pipe is connected with the quartz spiral ventilation pipe in a penetrating mode, and the stainless steel spiral ventilation pipe and the quartz spiral ventilation pipe are arranged in the temperature control chamber. When the carbon disulfide sensor technology is used to measure the carbon disulfide concentration, the problems of signal attenuation with time, difficulty in continuous long-time detection of trace carbon disulfide in an industrial environment, the need for regular maintenance and high cost of a spectral detection method instrument are solved.

Description

Technical Field

[0001] This invention relates to the field of gas concentration detection technology, specifically to a carbon disulfide concentration measurement system and method based on ultraviolet light-induced conversion. Background Technology

[0002] Carbon disulfide is a common atmospheric sulfide pollutant. Industrially, it is widely used as an organic solvent and chemical raw material, commonly found in the manufacture of rayon, pesticides, and the vulcanization processes of rubber and pesticides. Carbon disulfide is highly toxic, acting as a multi-systemic affinity poison. Studies have shown that it has strong toxic effects on multiple human systems, including the cardiovascular, gastrointestinal, reproductive, urinary, and nervous systems, potentially causing neuropathy, Parkinson's disease, and arteriosclerosis. Even long-term exposure to trace amounts of carbon disulfide can cause irreversible and serious harm to human health. In my country, carbon disulfide emissions mainly originate from the manufacture of viscose fibers and the production of carbon disulfide organic solvents.

[0003] Currently, chemical sensing is mainly used for on-site detection of carbon disulfide. However, chemical sensing signals decay over time, and lifetime and gas selectivity remain important research topics in chemical sensing. Spectroscopy, with its non-contact, fast response, high gas selectivity, and ability to perform continuous long-term detection, is widely used in gas detection. Although carbon disulfide exhibits strong absorption in the ultraviolet 200nm band and infrared 4.59μm, strong scattering in the 200nm band, abundant material fingerprint spectral interference in this band, and the high cost of mid-infrared and deep ultraviolet equipment limit the development of spectroscopic carbon disulfide detection methods and systems. Therefore, based on ultraviolet photocatalysis, we propose an inversion detection method and system for carbon disulfide concentration by converting carbon disulfide into sulfur dioxide and utilizing the strong absorption of sulfur dioxide in the 300nm band, combined with absorption spectroscopy. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a carbon disulfide concentration measurement system and method based on ultraviolet light-induced conversion. This solves the problems of signal attenuation over time when measuring carbon disulfide concentration using carbon disulfide sensor technology, difficulty in continuous long-term detection of trace carbon disulfide in industrial environments, the need for regular maintenance, and high instrument costs for spectral detection methods.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] On the one hand, a carbon disulfide concentration measurement system based on ultraviolet light-induced conversion is provided. The system includes a stainless steel spiral vent tube, a quartz spiral vent tube, a mercury lamp, a light shield, a temperature control room, a deuterium lamp, a first lens, a gas cell, a second lens, an optical fiber, a spectrometer, and a computer.

[0009] As carbon disulfide gas flows through the stainless steel spiral vent pipe, it gradually heats up to 100-200°C. The gas flowing out of the stainless steel spiral vent pipe and into the quartz spiral vent pipe has already been heated to 100-200°C. The stainless steel spiral vent pipe and the quartz spiral vent pipe are connected by a silicone tube, and both the stainless steel spiral vent pipe and the quartz spiral vent pipe are installed in the controlled temperature room. The quartz spiral vent pipe is wound around a mercury lamp, and a light shield is provided on the outside of the quartz spiral vent pipe.

[0010] The output end of the quartz spiral vent tube is connected to the gas pool. A deuterium lamp is installed on one side of the gas pool. A first lens is installed between the deuterium lamp and the gas pool. A second lens is installed on the other side of the gas pool.

[0011] The ultraviolet broadband light emitted by the deuterium lamp passes through the first lens and enters the gas cell. The light emitted from the gas cell passes through the second lens and enters one end of the optical fiber.

[0012] The other end of the optical fiber is connected to the optical signal receiving end of the spectrometer.

[0013] The data signal input terminal of the spectrometer is connected to the computer.

[0014] Preferably, the quartz spiral vent tube is transparent to 185nm ultraviolet light, and the mercury lamp has a strong emission spectrum at 185nm. There are two main types of mercury lamps on the market: one emits light starting from 253.7nm and does not emit light at 184.9nm; the other emits light at both 184.9nm and 253.7nm. This invention primarily utilizes the 184.9nm emission of the mercury lamp to achieve the ultraviolet conversion of carbon disulfide; 235.7nm light cannot convert carbon disulfide, hence this requirement.

[0015] Preferably, the temperature control room uses PID control, and the temperature drift over a long period of time does not exceed 0.3℃.

[0016] Preferably, both the first lens and the second lens are quartz convex lenses.

[0017] Preferably, the gas pool is provided with an entrance window, an exit window, an inlet, and an outlet.

[0018] Preferably, the gas pool is a cylindrical gas pool, the entrance window and the exit window are located on the two end faces of the cylindrical gas pool, and the inlet and the outlet are located on the two end sidewalls of the cylindrical gas pool.

[0019] Preferably, both the incident window and the exit window are quartz windows with a spectral transmittance of 0 at 220 nm.

[0020] Furthermore, a method for measuring carbon disulfide concentration based on ultraviolet light-induced conversion is provided, characterized by comprising the following steps:

[0021] Step 1: The carbon disulfide gas to be tested is introduced into the stainless steel spiral vent tube at a fixed flow rate. As the gas moves forward in the stainless steel spiral vent tube, the gas gradually heats up to the temperature controlled by the temperature control chamber.

[0022] Step 2: Carbon disulfide gas flowing out of the stainless steel spiral vent pipe flows into the quartz spiral vent pipe and is gradually photocatalytically converted into sulfur dioxide under the irradiation of a mercury lamp;

[0023] Step 3: Calculate the time (t) for the gas to flow through the quartz spiral vent tube based on the gas flow rate, length, and diameter of the quartz spiral vent tube;

[0024] Step 4: The gas flowing out of the quartz spiral vent tube flows into the gas pool;

[0025] Step 5: The broadband ultraviolet light emitted by the deuterium lamp is collimated into parallel light by the first lens;

[0026] Step 6: Parallel light enters the gas cell. The parallel light is absorbed by the gas in the gas cell, which weakens the spectral intensity of the parallel light, resulting in transmitted light.

[0027] Step 7: After the transmitted light passes through the second lens, it converges to form focused light;

[0028] Step 8: The focused light passes through an optical fiber and is incident into a spectrometer, which converts the focused light into a data signal.

[0029] Step 9: The computer processes the data signal from the spectrometer to obtain the concentration C of sulfur dioxide in the gas cell;

[0030] Step 10: Calculate the sulfur dioxide production rate based on the sulfur dioxide concentration C and the conversion time t. Utilize the correlation between the sulfur dioxide production rate and the initial concentration of carbon disulfide to obtain the concentration of the carbon disulfide gas to be measured.

[0031] Preferably, the computer processes the data signal from the spectrometer by integrating the absorbance of parallel light in the 284nm-311nm wavelength band absorbed by the gas in the gas cell to obtain the optical parameter OP related to the sulfur dioxide concentration. By comparing the optical parameter OP of the sulfur dioxide concentration in the gas cell with the system's sulfur dioxide concentration calibration curve, the concentration of sulfur dioxide generated after ultraviolet photocatalytic conversion is obtained.

[0032] (III) Beneficial Effects

[0033] This invention relates to a carbon disulfide concentration measurement system and method based on ultraviolet light-induced conversion, which effectively solves the problems of signal attenuation over time when measuring carbon disulfide concentration using carbon disulfide sensor technology, difficulty in continuous long-term detection of trace carbon disulfide in industrial environments, the need for regular maintenance, and high instrument costs for spectral detection methods. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to the present invention;

[0035] Figure 2 This is a schematic diagram of the gas pool structure in an embodiment of the present invention.

[0036] The components include: 1. Stainless steel spiral vent pipe; 2. Quartz spiral vent pipe; 3. Mercury lamp; 4. Light shield; 5. Temperature control chamber; 6. Deuterium lamp; 7. First lens; 8. Gas cell; 9. Second lens; 10. Optical fiber; 11. Spectrometer; 12. Computer. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Example

[0039] like Figure 1-2 As shown, the present invention provides a specific implementation method one: combining Figure 1 This embodiment describes a carbon disulfide concentration measurement system based on ultraviolet light-induced conversion. The system includes a stainless steel spiral vent tube 1, a quartz spiral vent tube 2, a mercury lamp 3, a light shield 4, a temperature control chamber 5, a deuterium lamp 6, a first lens 7, a gas cell 8, a second lens 9, an optical fiber 10, a spectrometer 11, and a computer 12.

[0040] Carbon disulfide gas gradually heats up to 100-200°C as it flows through the stainless steel spiral vent pipe 1. The oxygen content of the sample gas should be less than 0.5%. Before entering the stainless steel spiral vent pipe 1, the gas is mixed with air at a ratio of 3:1. After mixing, the gas enters the stainless steel spiral vent pipe 1 and flows out. The gas entering the quartz spiral vent pipe 2 has been heated to 100-200°C. This temperature should be matched with the light intensity of the light source to maximize the conversion efficiency. The specific temperature depends on the system set up on site. The stainless steel spiral vent pipe 1 and the quartz spiral vent pipe 2 are connected by a silicone tube. Both the stainless steel spiral vent pipe 1 and the quartz spiral vent pipe 2 are set in the controlled temperature room 5. The quartz spiral vent pipe 2 is wound around the mercury lamp 3, and a light shield 4 is provided on the outside of the quartz spiral vent pipe 2.

[0041] The output end of the quartz spiral vent tube 2 is connected to the gas pool 8. A deuterium lamp 6 is installed on one side of the gas pool 8. A first lens 7 is installed between the deuterium lamp 6 and the gas pool 8. A second lens 9 is installed on the other side of the gas pool 8.

[0042] The carbon disulfide gas to be tested flows into the stainless steel spiral vent pipe 1 at a fixed flow rate. As the gas moves forward in the stainless steel spiral vent pipe 1, the gas gradually heats up to the temperature controlled by the temperature control chamber 5. The gas flowing out of the stainless steel spiral vent pipe 1 flows into the quartz spiral vent pipe 2 and gradually photocatalytically converts to produce sulfur dioxide under the irradiation of the mercury lamp 3. The gas flowing out of the quartz spiral vent pipe 2 enters the gas pool 8.

[0043] The ultraviolet broadband light emitted by the deuterium lamp 6 passes through the first lens 7 and enters the gas cell 8. The light emitted from the gas cell 8 passes through the second lens 9 and enters one end of the optical fiber 10. The first lens 7 is used to collimate the ultraviolet broadband light into parallel light, the second lens 9 is used to convert the transmitted light into focused light, and the optical fiber 10 is used to conduct the focused light. The optical fiber 10 is made of quartz optical fiber, which has better ultraviolet conductivity and can effectively prevent the light intensity of the focused light from weakening during the transmission process, thus preventing measurement errors.

[0044] The other end of the optical fiber 10 is connected to the optical signal receiving end of the spectrometer 11;

[0045] The data signal input / output terminal of the spectrometer 11 is connected to the computer 12; the spectrometer 11 is used to separate incident light and transmitted light.

[0046] In this embodiment, a stainless steel spiral vent tube 1 and a quartz spiral vent tube 2 are used to achieve gas heat exchange and gas-light interaction, respectively. A deuterium lamp 6 is used as the light source. The ultraviolet broadband light emitted by the deuterium lamp 6 is collimated into parallel light by the first lens 7. The collimated parallel light is injected into the gas cell 8, which is used to hold the gas to be tested after ultraviolet conversion by the mercury lamp 3. The transmitted light emitted from the gas cell is converged by the second lens 9 and converted into focused light. The focused light is injected into the optical fiber 10 and coupled into the spectrometer 11. The spectrometer 11 transmits the data signal to the computer 12. Finally, the computer 12 processes the data signal to obtain the concentration of the carbon disulfide gas to be tested.

[0047] Specific Implementation Method Two: This implementation method further defines the carbon disulfide concentration measurement system based on ultraviolet light-induced conversion described in Specific Implementation Method One. In this implementation method, the quartz spiral vent tube 2 has high 185nm ultraviolet light transmittance; the mercury lamp 3 has a strong emission spectrum at 185nm; the temperature control chamber 5 uses PID control, and the temperature drift over a long period does not exceed 0.3℃; the first lens 7 and the second lens 9 are both quartz convex lenses. This invention mainly utilizes 184.9nm ultraviolet light irradiation to achieve the ultraviolet conversion of carbon disulfide into sulfur dioxide, therefore, the quartz spiral vent tube is required to have high 185nm ultraviolet light transmittance. (See above for an explanation of the mercury lamp.) The sulfur dioxide production rate is temperature-dependent, so temperature control of the conversion process is required. Because the 284-311nm spectrum needs to be processed, the optical detection system is required to transmit light in this band, hence the selection of a quartz lens.

[0048] Specific implementation method three: Combining Figure 2 This embodiment further defines the carbon disulfide concentration measurement system based on ultraviolet light-induced conversion described in Specific Embodiment 2. In this embodiment, the gas cell 8 is provided with an incident window, an exit window, an inlet, and an outlet.

[0049] Gas cell 8 is a cylindrical gas cell. The entrance and exit windows are located on the two end faces of the cylindrical gas cell, while the inlet and outlet are located on the two end sidewalls of the cylindrical gas cell. Both the entrance and exit windows are quartz windows with zero spectral transmittance up to 220 nm. The gas cell is used to hold the converted gas, and the spectrometer needs to collect the 284-311 nm spectrum. Therefore, based on the principle of absorption spectroscopy measurement, quartz light-transmitting windows are provided at both ends of the gas cell. Since the deuterium lamp also has strong emission at 185 nm, to prevent the remaining carbon disulfide in the mixed gas flowing out of the quartz spiral ventilation tube from further conversion within the gas cell, the entrance and exit windows use ordinary quartz with no spectral transmittance up to 220 nm, rather than deep ultraviolet quartz.

[0050] Specific Implementation Method Four: This implementation method is based on the measurement method of carbon disulfide concentration measurement system based on ultraviolet light-induced conversion described in Specific Implementation Method One. The method includes the following steps:

[0051] Step 1: The carbon disulfide gas to be tested is introduced into the stainless steel spiral vent tube 1 at a fixed flow rate. As the gas moves forward in the stainless steel spiral vent tube 1, the gas gradually heats up to the temperature controlled by the temperature control room 5.

[0052] Step 2: Carbon disulfide gas flowing out of stainless steel spiral vent pipe 1 flows into quartz spiral vent pipe 2, and is gradually photocatalytically converted into sulfur dioxide under the irradiation of mercury lamp 3;

[0053] Step 3: Calculate the time t for the gas to flow through the quartz spiral vent tube 2 based on the gas flow rate and the length and diameter of the quartz spiral vent tube 2;

[0054] Step 4: The gas flowing out of the quartz spiral vent pipe 2 flows into the gas pool 8;

[0055] Step 5: The ultraviolet broadband light emitted by the deuterium lamp 6 is collimated into parallel light by the first lens 7;

[0056] Step 6: Parallel light enters the gas cell 8. The parallel light is absorbed by the gas in the gas cell 8, which weakens the spectral intensity of the parallel light and forms transmitted light.

[0057] Step 7: After the transmitted light passes through the second lens 9, it converges to form converged light;

[0058] Step 8: The focused light passes through the optical fiber 10 and is incident into the spectrometer 11, where the spectrometer 11 converts the focused light into a data signal.

[0059] Step 9: The computer 12 processes the data signal from the spectrometer 11 to obtain the concentration C of sulfur dioxide in the gas in the gas cell 8.

[0060] Step 10: Calculate the sulfur dioxide production rate based on the sulfur dioxide concentration C and the conversion time t. Utilize the relationship between the sulfur dioxide production rate and the initial concentration of carbon disulfide to obtain the concentration of the carbon disulfide gas to be measured.

[0061] Specific Implementation Method 5: This implementation method further defines the measurement method of the carbon disulfide concentration measurement system based on ultraviolet light-induced conversion described in Specific Implementation Method 4. In this implementation method, the data processing process of the computer 12 on the data signal of the spectrometer 11 in step nine is as follows: the data is processed according to Beer-Lambert's law; the absorbance A of the gas in the gas cell 8 absorbing parallel light in the 284nm-311nm band is integrated to obtain the optical parameter OP related to the sulfur dioxide concentration; by comparing the optical parameter OP of the sulfur dioxide concentration in the gas in the gas cell 8 with the sulfur dioxide concentration calibration curve of the system, the sulfur dioxide concentration in the gas in the gas cell 8 is obtained.

[0062] The value of A is given by ln(I0(λ) / I(λ)), where I(λ) represents the light intensity detected at wavelength λ, i.e., the transmitted light intensity; and I0(λ) represents the incident light intensity at wavelength λ, i.e., the transmitted light intensity after the gas cell is filled with high-purity nitrogen.

[0063] Specific Implementation Method Six: This implementation method is based on the measurement method described in Specific Implementation Method Four, but replaces carbon disulfide with hydrogen sulfide. The concentration of hydrogen sulfide can also be measured. This method includes the following steps:

[0064] Step 1: The hydrogen sulfide gas to be tested is introduced into the stainless steel spiral vent tube 1 at a fixed flow rate. As the gas moves forward in the stainless steel spiral vent tube 1, the gas gradually heats up to the temperature controlled by the temperature control room 5.

[0065] Step 2: Hydrogen sulfide gas flowing out of stainless steel spiral vent pipe 1 flows into quartz spiral vent pipe 2, and is gradually photocatalytically converted into sulfur dioxide under the irradiation of mercury lamp 3;

[0066] Step 3: Calculate the time t for the gas to flow through the quartz spiral vent tube 2 based on the gas flow rate and the length and diameter of the quartz spiral vent tube 2;

[0067] Step 4: The gas flowing out of the quartz spiral vent pipe 2 flows into the gas pool 8;

[0068] Step 5: The ultraviolet broadband light emitted by the deuterium lamp 6 is collimated into parallel light by the first lens 7;

[0069] Step 6: Parallel light enters the gas cell 8. The parallel light is absorbed by the gas in the gas cell 8, which weakens the spectral intensity of the parallel light and forms transmitted light.

[0070] Step 7: After the transmitted light passes through the second lens 9, it converges to form converged light;

[0071] Step 8: The focused light passes through the optical fiber 10 and is incident into the spectrometer 11, where the spectrometer 11 converts the focused light into a data signal.

[0072] Step 9: The computer 12 processes the data signal from the spectrometer 11 to obtain the concentration C of sulfur dioxide in the gas in the gas cell 8.

[0073] Step 10: Calculate the sulfur dioxide production rate based on the sulfur dioxide concentration C and the conversion time t. Utilize the relationship between the sulfur dioxide production rate and the initial hydrogen sulfide concentration to obtain the concentration of the hydrogen sulfide gas to be measured.

[0074] Specific Implementation Method Seven: This implementation method further defines the measurement method of Specific Implementation Method Six. In this implementation method, the data processing process of the computer 12 on the data signal of the spectrometer 11 in step nine is as follows: the data is processed according to Beer-Lambert's law; the absorbance A of the gas in the gas cell 8 absorbing parallel light in the 200-220nm wavelength band is integrated to obtain the optical parameter OP related to the sulfur dioxide concentration; by comparing the optical parameter OP of the sulfur dioxide concentration in the gas in the gas cell 8 with the sulfur dioxide concentration calibration curve of the system, the sulfur dioxide concentration in the gas in the gas cell 8 is obtained.

[0075] The value of A is given by ln(I0(λ) / I(λ)), where I(λ) represents the light intensity detected at wavelength λ, i.e., the transmitted light intensity; and I0(λ) represents the incident light intensity at wavelength λ, i.e., the transmitted light intensity after the gas cell is filled with high-purity nitrogen.

[0076] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A carbon disulfide concentration measurement system based on ultraviolet light-induced conversion, characterized in that, It includes a stainless steel spiral vent tube (1), a quartz spiral vent tube (2), a mercury lamp (3), a light shield (4), a temperature control room (5), a deuterium lamp (6), a first lens (7), a gas cell, a second lens (9), an optical fiber (10), a spectrometer (11), and a computer (12); Carbon disulfide gas gradually heats up to 100-200°C as it flows through the stainless steel spiral vent pipe (1). The gas flowing out of the stainless steel spiral vent pipe (1) and into the quartz spiral vent pipe (2) has been heated to 100-200°C. The stainless steel spiral vent pipe (1) and the quartz spiral vent pipe (2) are connected by a silicone tube. Both the stainless steel spiral vent pipe (1) and the quartz spiral vent pipe (2) are set in the temperature control room (5). The quartz spiral vent pipe (2) is wrapped around the mercury lamp (3), and a light shield (4) is provided on the outside of the quartz spiral vent pipe (2). The output end of the quartz spiral vent tube (2) is connected to the gas pool (8). A deuterium lamp (6) is installed on one side of the gas pool (8). A first lens (7) is installed between the deuterium lamp (6) and the gas pool (8). A second lens (9) is installed on the other side of the gas pool (8). The ultraviolet broadband light emitted by the deuterium lamp (6) passes through the first lens (7) and enters the gas cell (8). The light emitted from the gas cell (8) passes through the second lens (9) and enters one end of the optical fiber (10). The other end of the optical fiber (10) is connected to the optical signal receiving end of the spectrometer (11); The data signal input terminal of the spectrometer (11) is connected to the computer (12).

2. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 1, characterized in that: The quartz spiral vent tube (2) is transparent to 185nm ultraviolet light, and the mercury lamp (3) has a strong emission spectrum at 185nm.

3. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 1, characterized in that: The temperature control room (5) uses PID for temperature control, and the temperature drift over a long period of time does not exceed 0.3℃.

4. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 1, characterized in that: Both the first lens (7) and the second lens (9) are quartz convex lenses.

5. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 1, characterized in that: The gas pool (8) is provided with an entrance window, an exit window, an inlet and an outlet.

6. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 5, characterized in that: The gas pool (8) is a cylindrical gas pool (8), the entrance window and the exit window are located on the two end faces of the cylindrical gas pool (8), and the inlet and outlet are located on the two end side walls of the cylindrical gas pool (8).

7. The carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 5, characterized in that: Both the incident window and the exit window are quartz windows with a spectral transmittance of 0 at 220 nm.

8. A method for measuring carbon disulfide concentration based on ultraviolet light-induced conversion as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: The carbon disulfide gas to be tested is introduced into the stainless steel spiral vent pipe (1) at a fixed flow rate. As the gas moves forward in the stainless steel spiral vent pipe (1), the gas gradually heats up to the temperature controlled by the temperature control chamber (5). Step 2: Carbon disulfide gas flowing out of the stainless steel spiral vent pipe (1) flows into the quartz spiral vent pipe (2) and is gradually photocatalytically converted into sulfur dioxide under the irradiation of the mercury lamp (3); Step 3: Calculate the time t taken for the gas to flow through the quartz spiral vent tube (2) based on the gas flow rate, length, and diameter of the quartz spiral vent tube (2); Step 4: The gas flowing out of the quartz spiral vent tube (2) flows into the gas pool (8); Step 5: The ultraviolet broadband light emitted by the deuterium lamp (6) is collimated into parallel light by the first lens (7); Step 6: Parallel light enters the gas cell (8). The parallel light is absorbed by the gas in the gas cell (8), which weakens the spectral intensity of the parallel light and forms transmitted light. Step 7: After the transmitted light passes through the second lens (9), it converges to form converged light; Step 8: The focused light passes through the optical fiber (10) and is incident into the spectrometer (11), where the spectrometer (11) converts the focused light into a data signal. Step 9: The computer (12) processes the data signal from the spectrometer (11) to obtain the concentration C of sulfur dioxide in the gas cell (8); Step 10: Calculate the sulfur dioxide production rate based on the sulfur dioxide concentration C and the conversion time t. Utilize the correlation between the sulfur dioxide production rate and the initial concentration of carbon disulfide to obtain the concentration of the carbon disulfide gas to be measured.

9. The measurement method of the carbon disulfide concentration measurement system based on ultraviolet light-induced conversion according to claim 8, characterized in that: The computer (12) processes the data signal from the spectrometer (11) by integrating the absorbance of the gas in the gas cell (8) in the 284nm-311nm band to obtain the optical parameter OP related to the sulfur dioxide concentration. By comparing the optical parameter OP of the sulfur dioxide concentration in the gas cell (8) with the sulfur dioxide concentration calibration curve of the system, the concentration of sulfur dioxide generated by ultraviolet photocatalytic conversion is obtained.

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