Odor substance identification system capable of simulating polluted water area environment composition

Abstract

The utility model discloses a peculiar smell substance identification system capable of simulating polluted water area environment composition, which is characterized in that the output end of a first carrier gas supply source is communicated to a gas chromatograph, and the output end of the gas chromatograph and the output end of a second carrier gas supply source are communicated and converged through a pipeline structure; the dry air supply source is communicated with the input end of the detector and the input end of the sniffing port directly or indirectly through a pipeline structure, the output end of the dry air supply source is communicated to the input end of the humidifying module, the output end of the humidifying module is communicated to the input end of the sniffing port to output wet air, and the temperature control module comprises a heating sleeve and a refrigerating assembly. The pipeline structure at least close to the input end of the sniffing port is wrapped with a heating sleeve, a refrigeration assembly is arranged between the heating sleeve and the sniffing port, the temperature control module is electrically connected to the controller, and the temperature control module heats or cools gas in the pipeline, so that environmental factors existing in the polluted water area are reduced as much as possible, and the pollution of the polluted water area is reduced. And the identification accuracy of the peculiar smell substances is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to an odor substance identification system which can simulate the composition of polluted water environment. Background Art

[0002] Polluted waters that emit odors can seriously affect the living environment of nearby residents and may even endanger their health. The source of the odor needs to be addressed to improve the quality of life for residents. However, in the process of odor control, the problem of unknown sources of odors often arises, which means that target screening of odorous substances cannot be performed.

[0003] In order to solve the above problems, the patent document with application number 202210641598.7 discloses a method for accurately identifying odor-causing substances based on non-target screening. The specific steps are as follows: S1, sample pretreatment; S2, non-target screening method; S3, sensory evaluation; S4, odor activity value analysis; S5, comprehensive evaluation analysis; S6, determination of key odor-causing factors.

[0004] The above-mentioned existing technology discloses a method for accurately identifying odor-causing factors based on non-target screening coupled sensory evaluation, olfactory detection technology, odor activity value, and comprehensive evaluation analysis. It constructs olfactory evaluation rules for odorous gases and an evaluation system for key odor substances, providing new ideas and methods for solving the problem of "being able to smell but not being able to detect" that occurs in actual monitoring, and provides technical methods and application support for the subsequent accurate tracing and control of odor pollution.

[0005] However, the existing technology is to send part of the gas samples of various substances separated by the gas chromatograph to the detector for qualitative and quantitative analysis, and part of it to the olfactory staff for smelling. The applicant and the utility model inventor have deeply studied sewage treatment technology and found in actual operation that: for the specific scenario of polluted waters, the odor smelled by the olfactory staff on site is closely related to environmental factors such as humidity and temperature. Therefore, it is difficult for the olfactory staff who return to the laboratory to smell the odor very close to the polluted waters again, which increases the difficulty of the olfactory staff's identification, and may reduce the accuracy of identifying odorous substances, which is not conducive to subsequent treatment work.

[0006] In summary, the present invention aims to provide a system that can restore environmental factors such as temperature, humidity, and air composition in a material gas sample as much as possible. Summary of the Invention

[0007] In response to the problems in the related art, the present invention proposes an odor substance identification system that can simulate the composition of a polluted water environment to overcome the above-mentioned technical problems existing in the existing related art.

[0008] The technical solution of the present utility model is achieved as follows:

[0009] An odorant recognition system capable of simulating the composition of a polluted water environment, comprising a gas chromatograph, a detector, a controller, a first carrier gas supply source, a second carrier gas supply source, a temperature control module, a dry air supply source, a humidification module, a sniffing port and a pipeline structure.

[0010] The output end of the first carrier gas supply source is connected to the gas chromatograph.

[0011] The gas chromatograph includes a separation chromatographic column with a coating. The output end of the gas chromatograph and the output end of the second carrier gas supply source are connected and gathered through a pipeline structure, and then are directly or indirectly connected to the input end of the detector and the input end of the sniffing port respectively through the pipeline structure.

[0012] The output end of the dry air supply source is connected to the input end of the humidification module, and the output end of the humidification module is connected to the input end of the sniffing port to output moist air.

[0013] The temperature control module includes a heating sleeve and a refrigeration component. At least the pipeline structure near the input end of the sniffing port is wrapped with the heating sleeve, and the refrigeration component is arranged between the heating sleeve and the sniffing port. The temperature control module is electrically connected to the controller, and the temperature control module heats or cools the gas in the pipeline.

[0014] Compared with the prior art, the utility model integrally connects multiple devices. Each of the several gas samples successively separated by the gas chromatograph is divided into two parts. One part is transported to the detector for qualitative and quantitative analysis, and the other part of the gas sample is heated or cooled by the heating sleeve or the refrigeration component before being sniffed to simulate the environmental temperature of the polluted water area during sampling. At the same time, the humidification module is set to mix an appropriate amount of moist air before the gas sample is sniffed to simulate the gas composition and environmental humidity of the polluted water area during sampling, and finally transported to the sniffing port for the sniffing operator to sniff and distinguish, so as to realize restoring the environmental factors existing in the polluted water area as much as possible, reducing the discrimination difficulty of the sniffing operator, striving to enable the sniffing operator to re-sniff the odor of the polluted water area that is the same or basically the same, and further improving the recognition accuracy of the odorant of the utility model, which is beneficial to the subsequent odor treatment work.

[0015] Preferably, the controller is connected to a human-computer interaction module, and the human-computer interaction module can be a display screen, a keyboard, a mouse, a touch screen display, etc., which is convenient for the detection personnel to monitor and view various real-time data (such as viewing the chromatogram, temperature, etc. output by the detector), set parameters as needed, and view the start / stop status of the function module, etc.

[0016] Specifically, the detector is a mass spectrometer MS, PID, ECD, etc.

[0017] When the detector is a mass spectrometer MS, the carrier gas supplied by the first carrier gas supply source and the second carrier gas supply source is helium; when the detector is a PID or an ECD, the carrier gas supplied by the first carrier gas supply source and the second carrier gas supply source is nitrogen.

[0018] The first carrier gas supply source and the second carrier gas supply source are commercially available gas cylinders storing the target carrier gas, without special restrictions.

[0019] Preferably, the pipeline structure includes a four-way valve, a three-way valve and several conduits;

[0020] The first interface of the four-way valve is directly or indirectly connected to the gas output end of the gas chromatograph through a conduit;

[0021] The second interface of the four-way valve is directly or indirectly connected to the input end of the detector through a conduit;

[0022] The third interface of the four-way valve is directly or indirectly connected to the output end of the second carrier gas supply source through a conduit;

[0023] The fourth interface of the four-way valve is directly or indirectly connected to the fifth interface of the three-way valve through a conduit;

[0024] The sixth interface of the three-way valve is directly or indirectly connected to the output end of the humidification module through a conduit;

[0025] The seventh interface of the three-way valve is directly or indirectly connected to the input end of the sniffing port through a conduit;

[0026] Specifically, the conduit can be a hollow chromatographic column without a coating.

[0027] Preferably, the heating sleeve includes a bendable copper tube, a resistance heating wire, a heat insulating cotton and a temperature rising sensor.

[0028] The outer periphery of the pipeline structure near the sniffing port is sequentially wrapped with a bendable copper tube, a resistance heating wire and a heat insulating cotton. The resistance heating wire generates heat to conduct heat to the bendable copper tube, and the bendable copper tube conducts heat to the pipeline structure, thereby realizing heating of the gas sample; the temperature rising sensor monitors the temperature of the resistance heating wire and transmits temperature information to the controller.

[0029] The bendable copper tube also has a protective effect on the pipeline structure, and the heat insulating cotton has the functions of heat preservation and protection.

[0030] The refrigeration component includes a refrigeration cavity for accommodating gas, a semiconductor refrigeration chip and a temperature lowering sensor.

[0031] The refrigeration cavity has an inlet and an outlet. The inlet is directly or indirectly connected to a pipe structure wrapped with a heating sleeve, and the outlet is directly or indirectly connected to the input end of the smelling port; the semiconductor refrigeration sheet cools the gas in the refrigeration cavity to a specified temperature (i.e., the ambient temperature of the polluted water area), and the temperature reduction sensor monitors the temperature in the refrigeration cavity.

[0032] It should be noted that the semiconductor refrigeration sheet of the present utility model does not need to overly pursue the performance of manufacturing ultra-low temperatures. Generally speaking, when the temperature is too low, it is difficult for odors to dissipate, and there are few odor incidents. It is also not suitable to sample at low temperatures. Considering the winter temperature in Guangdong, the lowest temperature that the semiconductor refrigeration sheet can manufacture can be between 10 and 15 °C.

[0033] Preferably, the smelling port is a horn-shaped structure with a narrow mouth and a wide mouth. The outer contour of the wide mouth fits the shape of the nose. The narrow mouth is detachably installed on the side of a handheld box. The design of the handheld box is convenient for the smeller to hold, and at the same time, the three-way valve and the refrigeration component can be integrated into the handheld box to avoid too many exposed components and being too scattered.

[0034] Specifically, the refrigeration component is arranged on one side of the interior of the handheld box close to the smelling port. The semiconductor refrigeration sheet is installed on the top of the refrigeration cavity. A heat dissipation grid penetrating the box body is provided at the position corresponding to the semiconductor refrigeration sheet on the top of the handheld box. The temperature reduction sensor is installed at the bottom of the refrigeration cavity;

[0035] The three-way valve is installed and fixed on the other side. The fifth interface of the three-way valve is connected to the fourth interface of the four-way valve through a conduit and is wrapped with a heating sleeve. The sixth interface of the three-way valve is connected to the output end of the humidification module. The seventh interface of the three-way valve is connected to the inlet of the refrigeration cavity.

[0036] Two through ports are provided on the opposite side of the handheld box where the smelling port is installed for the pipe structure wrapped with a heating sleeve to pass through and for the pipe connected to the humidification module to pass through.

[0037] The connection between the narrow mouth and the handheld box can be designed as a snap-on installation, and it can be installed and disassembled by rotation.

[0038] Preferably, the humidification module includes a flow regulating valve, a humidification bottle, an input air pipe, an output air pipe, an air input port, and a moisture output port;

[0039] The air input port is respectively connected to the output end of the dry air supply source and the input end of the input air pipe. A flow regulating valve is provided between the air input port and the dry air supply source. The output end of the input air pipe extends below the liquid level of the humidification bottle, and the input end of the output air pipe extends into the humidification bottle and is located above the liquid level. The humidification bottle is filled with pure water, and a certain space is left between the pure water liquid level and the bottle mouth to accommodate humidified air.

[0040] The output end of the output air pipe is connected to the moisture output port, and the moisture output port is directly or indirectly connected to the olfactory port.

[0041] A porous wetting element (such as a sponge) is installed at the output end of the input air pipe. The porous wetting element is located below the liquid level of the humidifying bottle. After the dry air is poured into the porous wetting element, it spreads out and is fully wetted. The dry air then escapes upward to above the liquid level and is output from the output air pipe.

[0042] Specifically, the input air pipe and the output air pipe are made of polytetrafluoroethylene material.

[0043] The humidifier bottle includes a bottle body and a bottle cap. The bottle body is made of transparent glass, and the bottle cap is made of PP hard plastic. A Teflon gasket is provided on the inner side of the bottle cap. The bottle cap has two through holes for the input air pipe and the output air pipe to pass through. The input air pipe and the output air pipe are stuck in the through holes and form a sealed contact to prevent air leakage.

[0044] The humidification module includes a casing, on which the air input port, moisture output port and humidification bottle fixing clamp are provided. It is also adaptively provided with through holes, switches and other structures or elements for the air supply pipe to pass through. This is a conventional technology and not an innovative point of the utility model.

[0045] Preferably, the internal piping of the four-way valve is cross-shaped, forming the four aforementioned interfaces, with the first and third interfaces positioned opposite each other, and the second and fourth interfaces positioned opposite each other. This valve functions to counterbalance and mix the gas sample and carrier gas input through the first and third interfaces before being output through the second and fourth interfaces, respectively. In practical applications, an air pump, flow control valve, or the like may also be adaptively incorporated into the piping structure to control the flow of the gas sample.

[0046] Preferably, the conduit between the first interface and the gas chromatograph is wrapped with the heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state;

[0047] The conduit between the second interface and the detector is wrapped with a heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state;

[0048] A flow regulating valve is provided in the conduit between the third interface and the second carrier gas supply source;

[0049] The conduit between the fourth interface and the fifth interface is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set so that the gas in the conduit is at the same temperature as the ambient temperature of the polluted water area;

[0050] The conduit between the sixth interface and the humidification module is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set so that the gas in the conduit is at the same temperature as the ambient temperature of the polluted water area.

[0051] The gas chromatograph is equipped with an oven and the temperature of the oven is generally relatively high. Therefore, preferably, the four-way valve can be placed in the oven of the gas chromatograph. The conduits connected to the four-way valve extend outwards from the oven to connect to other devices. That is, no heating sleeve needs to be provided between the first interface and the gas chromatograph, which can reduce the setting of heating sleeves;

[0052] The conduit between the second interface and the detector is wrapped with a heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state;

[0053] A flow regulating valve is provided in the conduit between the third interface and the second carrier gas supply source;

[0054] The conduit between the fourth interface and the fifth interface is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set so that the gas in the conduit is at the same temperature as the ambient temperature of the polluted water area;

[0055] The conduit between the sixth interface and the humidification module is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set so that the gas in the conduit is at the same temperature as the ambient temperature of the polluted water area.

[0056] The flow regulating valve described in the present utility model can be an EPC electronic pressure controller. The flow regulating valve transmits information such as flow rate and pressure to the controller and is controlled by the controller.

[0057] In practical applications, the EPC electronic pressure controller can also be provided with a flow rate adjustment knob. The gas flow rate can be manually adjusted through the flow rate adjustment knob. The flow rate adjustment knob can set the gears to off, 1 ml / min, 2 ml / min, 3 ml / min, 4 ml / min, 5 ml / min, 6 ml / min, or the gas flow rate can also be adjusted through the above-mentioned human-machine interaction module.

[0058] Specifically, a connecting screw is provided at a position near the tail end of the hollow chromatographic column serving as the conduit. A through-hole is opened along the length direction in the middle of the connecting screw. An expansion sealing ring is installed at the end of the threaded section of the connecting screw. The hollow chromatographic column is inserted from the head to the tail of the connecting screw through the through-hole.

[0059] Internal threads adapted to the connecting screw are provided on the inner side walls of the interfaces of the four-way valve and the three-way valve. The inner side wall of the expansion sealing ring after being heated abuts against the outer side wall of the hollow chromatographic column, and the outer side wall abuts against the inner wall of the internal passage of the three-way valve or the four-way valve. The end of the hollow chromatographic column is exposed 24 mm inside the three-way valve or the four-way valve.

[0060] More specifically, the expansion sealing ring is formed by pressing a mixture of 85 wt% polyimide and 15 wt% graphite after homogenization, or it can be made of a malleable metal material. The expansion sealing ring will expand slightly after being heated, thereby achieving the above-mentioned sealing contact and preventing the leakage of the gas sample.

[0061] The three-way valve and the four-way valve are made of stainless steel material.

[0062] The chromatographic column has lengths such as 15 m, 30 m, 60 m, etc. The separation chromatographic column also has different liquid film thicknesses, diameters, etc. Those skilled in the art can select according to actual needs.

[0063] The main operation process of the present utility model:

[0064] (1) The pretreated odor water sample or / and odor gas sample enter the gas chromatograph. At the same time, carrier gas is introduced through the first carrier gas supply source and mixed with it to form an unseparated gas sample. Each substance in the unseparated gas sample is successively separated by the gas chromatograph, generating several gas samples. The gas samples enter the four-way valve through the first interface. At the same time, the carrier gas transported by the second carrier gas supply source enters the four-way valve through the third interface. The gas samples and the carrier gas are mixed by counterflow in the four-way valve, and then flow to the detector and the fifth interface of the three-way valve through the second interface and the fourth interface of the four-way valve respectively.

[0065] (2) The heating sleeve between the four-way valve and the handheld box has been preheated to the environmental temperature of the polluted water area or the refrigeration component in the handheld box has been precooled to the environmental temperature of the polluted water area. At the same time, the humidification module is started to transport humid air to the three-way valve.

[0066] The gas sample is heated or cooled, and at the same time mixed with humid air, and finally flows to the sniffing port for the sniffing operator to sniff.

[0067] (3) By the corresponding method of "gas sample - time - detector result", after the sniffing operator points out the odor gas sample, check the detector result corresponding to the gas sample in that time period, and the odor substance can be obtained, thereby determining the odor substance in the polluted water area.

[0068] In addition, olfactories in this field generally have standardized olfactory test records or experimental specifications when sniffing. Olfaction experts can simply operate according to the specifications without affecting the implementation of the technical solution of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is one of the structural diagrams of the present utility model;

[0070] Figure 2 This is the second structural diagram of the present utility model (some equipment is omitted);

[0071] Figure 3 This is one of the schematic diagrams of the combined structure of the four-way valve and the hollow chromatographic column of the utility model;

[0072] Figure 4 This is the second schematic diagram of the combined structure of the four-way valve and the hollow chromatographic column of the utility model;

[0073] Figure 5 This is a schematic diagram of the sheathed structure of the heating sleeve and the hollow chromatographic column of the utility model;

[0074] Figure 6 This is a schematic diagram of the structure of the interior of the handheld box and the sniffing port of the present invention;

[0075] Figure 7 This is one of the schematic diagrams of the combined structure of the three-way valve and the hollow chromatographic column of the utility model;

[0076] Figure 8 This is the second schematic diagram of the combined structure of the three-way valve and the hollow chromatographic column of the utility model;

[0077] Figure 9 This is one of the structural diagrams of the humidification module of the present utility model;

[0078] Figure 10 This is the second structural diagram of the humidification module of the present invention.

[0079] Reference numerals

[0080] A, first carrier gas supply source; B, gas chromatograph; C, second carrier gas supply source; D, detector; H, dry air supply source; I, humidification module; J, refrigeration assembly; K, heating sleeve; L, human-computer interaction module;

[0081] 1. Four-way valve; 101. First port; 102. Second port; 103. Third port; 104. Fourth port;

[0082] 2. Connecting screws; 201. Expansion seal ring;

[0083] 3. Hollow chromatographic column;

[0084] 4. Three-way valve; 405. Fifth interface; 406. Sixth interface; 407. Seventh interface;

[0085] 5. Flexible copper tube; 6. Resistance heating wire; 7. Heat insulation cotton;

[0086] 8. Handheld box; 801. Heat dissipation grid; 802. Through port;

[0087] 9. Semiconductor refrigeration chip; 10. Refrigeration cavity; 11. Sniffing port; 12. Temperature reduction sensor;

[0088] 13. Input air pipe; 14. Humidifying bottle; 15. Output air pipe; 16. Porous wetting member; 17. Machine shell; 18. Air input port; 19. Moisture output port;

[0089] 55. Temperature increase sensor;

[0090] 56. Flow regulating valve. Detailed implementation manners

[0091] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only one of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0092] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 construed as a limitation to the present invention.

[0093] Refer to Figures 1 to 10 , an odor substance identification system capable of simulating the composition of a polluted water environment, including a first carrier gas supply source A, a gas chromatograph B, a second carrier gas supply source C, a detector D, a controller, a temperature control module, a dry air supply source H, a humidification module I, a sniffing port 11 and a pipeline structure.

[0094] The output end of the first carrier gas supply source A is connected to the gas chromatograph B.

[0095] The gas chromatograph B includes a separation chromatographic column with a coating. The output end of the gas chromatograph B and the output end of the second carrier gas supply source C are communicated and collected through a pipeline structure, and then are directly or indirectly communicated with the input end of the detector D and the input end of the sniffing port 11 through the pipeline structure.

[0096] The output end of the dry air supply source H is communicated with the input end of the humidification module I, and the output end of the humidification module I is also communicated with the input end of the sniffing port 11 to output moist air.

[0097] The temperature control module includes a heating sleeve K and a refrigeration component J. At least the pipeline structure near the input end of the sniffing port 11 is wrapped with the heating sleeve K, and the refrigeration component J is arranged between the heating sleeve K and the sniffing port 11.

[0098] In this embodiment, the temperature control module has a function of heating gas and a function of cooling gas. The temperature control module is electrically connected to a controller. The opening or closing of each function of the temperature control module and the adjustment of the temperature are controlled by the controller, and the temperature control module heats or cools the gas in the pipeline.

[0099] In this embodiment, the controller is connected to a human-computer interaction module L, and the human-computer interaction module L is a display screen, a keyboard, a mouse, etc. connected to the controller.

[0100] In this embodiment, the pipeline structure includes a four-way valve 1, a three-way valve 4 and several conduits.

[0101] The four interfaces of the four-way valve 1 are set as a first interface 101, a second interface 102, a third interface 103 and a fourth interface 104, and the three interfaces of the three-way valve 4 are set as a fifth interface 405, a sixth interface 406 and a seventh interface 407.

[0102] In practical applications, the first interface 101 can be directly or indirectly communicated with the gas output end of the gas chromatograph B through a conduit. The conduit is wrapped with the following heating sleeve K, and the heating temperature of the heating sleeve K is set to at least keep the gas in the conduit in a gaseous state.

[0103] Specifically in this embodiment, refer to Figure 2 , the four-way valve 1 is arranged in the column oven of the gas chromatograph B, and the conduit connected to the four-way valve 1 extends out of the column oven to connect to other devices, that is, there is no heating sleeve arranged between the first interface 101 and the gas chromatograph B.

[0104] The second interface 102 is directly or indirectly communicated with the input end of the detector D through a conduit. The conduit is wrapped with a heating sleeve K, and the heating temperature of the heating sleeve K is set to at least keep the gas in the conduit in a gaseous state.

[0105] The third interface 103 is directly or indirectly connected to the output end of the second carrier gas supply source C through a conduit and is provided with a flow regulating valve 56 .

[0106] A conduit is connected between the fourth port 104 of the four-way valve 1 and the fifth port 405 of the three-way valve 4 and is wrapped with a heating sleeve K. A flow regulating valve 56 is also provided. The heating temperature of the heating sleeve K is set to make the gas in the conduit the same as the ambient temperature of the polluted water area.

[0107] A conduit is connected between the sixth interface 406 and the humidification module I and is wrapped with a heating sleeve K. A flow regulating valve 56 is also provided. The heating temperature of the heating sleeve K is set to make the gas in the conduit the same as the ambient temperature of the polluted water area.

[0108] The seventh interface 407 of the three-way valve 4 is directly or indirectly connected to the input end of the sniffing port 11 .

[0109] Reference Figure 3 and Figure 4 The internal pipeline of the four-way valve 1 is cross-shaped to form the four above-mentioned interfaces, the first interface 101 and the third interface 103 are arranged opposite to each other, and the second interface 102 and the fourth interface 104 are arranged opposite to each other.

[0110] The conduit is a hollow chromatography column 3 without coating.

[0111] A connecting screw 2 is provided near the tail end of each hollow chromatographic column 3 serving as a conduit. A through-hole is provided in the middle of the connecting screw 2 along its length. An expansion seal 201 is installed at the end of the threaded section of the connecting screw 2. The hollow chromatographic column 3 is inserted from the head of the connecting screw 2 to the tail end through the through-hole.

[0112] The inner walls of the interfaces of the four-way valve 1 and the three-way valve 4 are both provided with internal threads adapted to the connecting screws 2. After being heated, the inner wall of the expansion sealing ring 201 contacts the outer wall of the hollow chromatographic column 3, and the outer wall contacts the inner wall of the internal passage of the three-way valve 4 or the four-way valve 1. The end of the hollow chromatographic column 3 is exposed 3 mm inside the three-way valve 4 or the four-way valve 1.

[0113] More specifically, the expansion sealing ring 201 is formed by homogenizing and pressing 85 wt % polyimide and 15 wt % graphite. The expansion sealing ring 201 expands slightly when heated, thereby achieving the above-mentioned sealing contact and preventing gas leakage.

[0114] The three-way valve 4 and the four-way valve 1 are made of stainless steel.

[0115] The heating sleeve K includes a bendable copper tube 5, a resistance heating wire 6, a heat-insulating cotton 7, and a temperature-rising sensor 55.

[0116] The outer periphery of the conduit wrapped with the heating sleeve K is sequentially wrapped with the bendable copper tube 5, the resistance heating wire 6, and the heat-insulating cotton 7. The resistance heating wire 6 generates heat to conduct heat to the bendable copper tube 5, and the bendable copper tube 5 conducts heat to the pipeline structure, thereby realizing heating of the gas sample; the temperature-rising sensor 55 monitors the temperature of the resistance heating wire 6 and transmits temperature information to the controller.

[0117] The refrigeration component J includes a refrigeration cavity 10 for containing gas, a semiconductor refrigeration sheet 9, and a temperature-lowering sensor 12. The refrigeration component J is arranged between the seventh interface 407 of the three-way valve 4 and the sniffing port 11.

[0118] The refrigeration cavity 10 has an inlet and an outlet. The inlet is connected to the seventh interface 407 of the three-way valve 4, and the outlet is connected to the input end of the sniffing port 11; the semiconductor refrigeration sheet 9 cools the gas in the refrigeration cavity 10 to a specified temperature (i.e., the environmental temperature of the polluted water area), and the temperature-lowering sensor 12 monitors the temperature in the refrigeration cavity 10.

[0119] In this embodiment, the sniffing port 11 is a horn-shaped structure with a narrow mouth and a wide mouth. The outer contour of the wide mouth fits the shape of the nose, and the narrow mouth is detachably installed on the side of a handheld box 8.

[0120] Specifically, the refrigeration component J is arranged on one side of the interior of the handheld box 8 close to the sniffing port 11. The semiconductor refrigeration sheet 9 is installed on the top of the refrigeration cavity 10. A heat dissipation grid 802 penetrating the box body is opened at the top of the handheld box corresponding to the position of the semiconductor refrigeration sheet. The temperature-lowering sensor 12 is installed at the bottom of the refrigeration cavity 10;

[0121] The three-way valve 4 is installed and fixed on the other side. The fifth interface 405 of the three-way valve 4 is connected to the pipeline structure wrapped with the heating sleeve K. The sixth interface 406 of the three-way valve 4 is connected to the output end of the humidification module I. The seventh interface 407 of the three-way valve 4 is connected to the inlet of the refrigeration cavity 10.

[0122] The handheld box 8 is provided with two through holes 802 on the opposite side of the installed sniffing port 11 for pipelines to pass through.

[0123] The connection between the narrow mouth and the handheld box 8 is a snap-on installation, and it can be installed and disassembled by rotation.

[0124] In this embodiment, the humidification module I includes a flow regulating valve 56, a humidification bottle 14, an input air pipe 13, an output air pipe 15, an air input port 18 and a moisture output port 19.

[0125] The air input port 18 is respectively connected to the output end of the dry air supply source H and the input end of the input air pipe 13. A flow regulating valve 56 is provided between the air input port and the dry air supply source H. The output end of the input air pipe 13 extends below the liquid level of the humidification bottle 14, and the input end of the output air pipe 15 extends into the humidification bottle 14 and is located above the liquid level. The humidification bottle 14 is filled with pure water, and a certain space is left between the pure water liquid level and the bottle mouth to accommodate humidified air.

[0126] The output end of the output air pipe 15 is connected to the moisture output port 19 , and the moisture output port 19 is directly or indirectly connected to the sniffing port 11 .

[0127] A porous wetting element 16 (sponge) is installed at the output end of the input air pipe 13. The porous wetting element 16 is located below the liquid level of the humidifying bottle 14. After the dry air is poured into the porous wetting element 16, it spreads out and is fully wetted. The dry air then escapes upward to above the liquid level and is output from the output air pipe 15.

[0128] Specifically, the air input pipe 13 and the air output pipe 15 are made of polytetrafluoroethylene.

[0129] The humidifying bottle 14 includes a bottle body and a bottle cap. The bottle body is made of transparent glass and the bottle cap is made of PP hard plastic. A Teflon gasket is provided on the inner side of the bottle cap. The bottle cap has two through holes for the input air pipe 13 and the output air pipe 15 to pass through. The input air pipe 13 and the output air pipe 15 are stuck in the through holes and form a sealed contact to prevent air leakage.

[0130] The humidification module 1 further includes a housing 17, the exterior of which is provided with a flow control knob. The flow control knob can be used to set the gear to 1 ml / min, 2 ml / min, 3 ml / min, 4 ml / min, 5 ml / min, and 6 ml / min. The gas flow rate can also be adjusted through the human-computer interaction module L. The flow rate used in the test of this embodiment is 5 ml / min.

[0131] The housing 17 is provided with the air input port 18, the moisture output port 19 and the fixing clamp of the humidifying bottle 14, and is also adaptively provided with a through hole for the air supply pipe to pass through, a switch or other conventional components.

[0132] In this embodiment, the detector D is a mass spectrometer (MS). The mass spectrometer (MS) used in this embodiment uses a quadrupole as its unit mass analyzer. It is a scanning instrument that, by varying the voltage, allows only ions of a specific m / z to pass through the quadrupole in a stable trajectory and reach the ion detector. Quadrupole instrument operating modes: Full Scan Mode: Full Scan (SCAN) mode acquires all ions within a specific mass range and is suitable for identification of unknowns, method development, and qualitative and quantitative analysis of high-concentration analytes.

[0133] The chromatographic columns are available in lengths of 15, 30, and 60 m, and the separation chromatographic columns also have different liquid film thicknesses and diameters, etc. Those skilled in the art can select as needed based on actual conditions.

[0134] The first carrier gas supply source A and the second carrier gas supply source C are commercially available gas cylinders storing helium.

[0135] The dry air supply source H is a commercially available gas cylinder storing dry air.

[0136] The flow regulating valve 56 is an EPC electronic pressure controller. The flow regulating valve 56 transmits information such as flow rate and pressure to the controller and is controlled by the controller.

[0137] In actual applications, the EPC electronic pressure controller may also be equipped with a flow adjustment knob, through which the gas flow can be manually adjusted. The flow adjustment knob may set the gear to off, 1ml / min, 2ml / min, 3ml / min, 4ml / min, 5ml / min, 6ml / min, and the gas flow may also be adjusted through the above-mentioned human-computer interaction module L.

[0138] The pipeline structure also adapts to the setting of conventional components such as air pumps.

[0139] Based on the disclosure and teachings of the above specification, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. An odorant recognition system capable of simulating the composition of a polluted water environment, characterized in that, It includes a gas chromatograph, a detector, a controller, a first carrier gas supply source, a second carrier gas supply source, a temperature control module, a dry air supply source, a humidification module, a sniffing port, and a pipeline structure; The output end of the first carrier gas supply source is connected to the gas chromatograph; The gas chromatograph includes a separation chromatographic column with a coating. The output end of the gas chromatograph and the output end of the second carrier gas supply source are connected and collected through the pipeline structure, and then are directly or indirectly connected to the input end of the detector and the input end of the sniffing port respectively through the pipeline structure; The output end of the dry air supply source is connected to the input end of the humidification module, and the output end of the humidification module is connected to the input end of the sniffing port; The temperature control module includes a heating sleeve and a refrigeration component. At least the pipeline structure near the input end of the sniffing port is wrapped with the heating sleeve, and the refrigeration component is arranged between the heating sleeve and the sniffing port. The temperature control module is electrically connected to the controller, and the temperature control module heats or cools the gas in the pipeline.

2. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 1, wherein The pipeline structure includes a four-way valve, a three-way valve, and several conduits; The first interface of the four-way valve is directly or indirectly connected to the gas output end of the gas chromatograph through a conduit; The second interface of the four-way valve is directly or indirectly connected to the input end of the detector through a conduit; The third interface of the four-way valve is directly or indirectly connected to the output end of the second carrier gas supply source through a conduit; The fourth interface of the four-way valve is directly or indirectly connected to the fifth interface of the three-way valve through a conduit; The sixth interface of the three-way valve is directly or indirectly connected to the output end of the humidification module through a conduit; The seventh interface of the three-way valve is directly or indirectly connected to the input end of the sniffing port through a conduit.

3. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 1 or 2, characterized in that, The heating sleeve includes a flexible copper tube, a resistance heating wire, heat-insulating cotton, and a temperature-rising sensor; The outer periphery of the pipeline structure near the sniffing port is sequentially wrapped with a flexible copper tube, a resistance heating wire, and heat-insulating cotton. The resistance heating wire generates heat to conduct heat to the flexible copper tube, and the flexible copper tube conducts heat to the pipeline structure; the temperature-rising sensor monitors the temperature of the resistance heating wire and transmits temperature information to the controller.

4. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 2, wherein, The refrigeration component includes a refrigeration cavity for containing gas, a semiconductor refrigeration chip, and a temperature-lowering sensor; The refrigeration cavity has an inlet and an outlet. The inlet is directly or indirectly connected to the pipeline structure wrapped with a heating sleeve, and the outlet is directly or indirectly connected to the input end of the sniffing port; the semiconductor refrigeration chip cools the gas in the refrigeration cavity to a specified temperature, and the temperature-lowering sensor monitors the temperature in the refrigeration cavity and transmits temperature information to the controller.

5. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 4, wherein The sniffing port is a horn-shaped structure with a narrow mouth and a wide mouth. The outer contour of the wide mouth fits the shape of the nose. The narrow mouth is detachably installed on the side of a handheld box, and the three-way valve and the refrigeration component are arranged in the handheld box.

6. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 5, wherein The refrigeration component is arranged on one side of the interior of the handheld box near the sniffing port. The semiconductor refrigerating sheet is installed at the top of the refrigeration cavity. A heat dissipation grid penetrating the box body is provided at the position corresponding to the semiconductor refrigerating sheet on the top of the handheld box. The temperature reduction sensor is installed at the bottom of the refrigeration cavity. The three-way valve is installed and fixed on the other side of the interior of the handheld box. The fifth interface of the three-way valve is connected to the fourth interface of the four-way valve through a conduit and is wrapped with a heating sleeve. The sixth interface of the three-way valve is connected to the output end of the humidification module. The seventh interface of the three-way valve is connected to the inlet of the refrigeration cavity.

7. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 1, characterized in that, The humidification module includes a flow regulating valve, a humidification bottle, an input air pipe, an output air pipe, an air input port, and a moisture output port. The air input port is respectively connected to the output end of the dry air supply source and the air delivery end of the input air pipe. A flow regulating valve is provided between the air input port and the dry air supply source. The output end of the input air pipe extends below the liquid level of the humidification bottle. The input end of the output air pipe extends into the humidification bottle and is above the liquid level. The humidification bottle is filled with pure water, and there is a certain space between the pure water liquid level and the bottle mouth to accommodate the moist air. The output end of the output air pipe is connected to the moisture output port, and the moisture output port is directly or indirectly connected to the sniffing port.

8. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 2, wherein The internal pipeline of the four-way valve is in a cross shape to form the four above-mentioned interfaces. The first interface and the third interface are arranged oppositely, and the second interface and the fourth interface are arranged oppositely.

9. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 2, characterized in that, The conduit between the first interface and the gas chromatograph is wrapped with the heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state. The conduit between the second interface and the detector is wrapped with a heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state. A flow regulating valve is provided on the conduit between the third interface and the second carrier gas supply source. The conduit between the fourth interface and the fifth interface is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set to make the gas in the conduit the same as the environmental temperature of the polluted water area. The conduit between the sixth interface and the humidification module is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set to make the gas in the conduit the same as the environmental temperature of the polluted water area.

10. The odorant recognition system capable of simulating the composition of a polluted water environment according to claim 2, wherein The four-way valve is arranged in the column oven of the gas chromatograph, and the conduits connected to the four-way valve extend out of the column oven to connect to other devices. The conduit between the second interface and the detector is wrapped with a heating sleeve, and the heating temperature of the heating sleeve is set to at least keep the gas in the conduit in a gaseous state. A flow regulating valve is provided on the conduit between the third interface and the second carrier gas supply source. The conduit between the fourth interface and the fifth interface is wrapped with a heating sleeve and is also provided with a flow regulating valve. The heating temperature of the heating sleeve is set to make the gas in the conduit the same as the environmental temperature of the polluted water area. The conduit between the sixth interface and the humidification module is wrapped with a heating sleeve, and a flow regulating valve is provided at the same time. The heating temperature of the heating sleeve is set so that the gas in the conduit has the same temperature as the environment of the polluted water area.

Images