CN115479999A - Sulfur-free odorizing agent detection system and method - Google Patents
Sulfur-free odorizing agent detection system and method Download PDFInfo
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- CN115479999A CN115479999A CN202110668997.8A CN202110668997A CN115479999A CN 115479999 A CN115479999 A CN 115479999A CN 202110668997 A CN202110668997 A CN 202110668997A CN 115479999 A CN115479999 A CN 115479999A
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 87
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 59
- 239000002912 waste gas Substances 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims description 51
- 230000017525 heat dissipation Effects 0.000 claims description 44
- 238000003795 desorption Methods 0.000 claims description 39
- 239000003205 fragrance Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 12
- 238000002076 thermal analysis method Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 238000004817 gas chromatography Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003345 natural gas Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 11
- 239000005864 Sulphur Substances 0.000 description 11
- 238000001179 sorption measurement Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/12—Preparation by evaporation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/12—Preparation by evaporation
- G01N2030/126—Preparation by evaporation evaporating sample
- G01N2030/128—Thermal desorption analysis
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Abstract
The invention discloses a sulfur-free odorizing agent detection system and method, wherein the sulfur-free odorizing agent detection system comprises a thermal analyzer, the thermal analyzer is provided with a sample inlet, a sample outlet and a waste gas exhaust pipe, and the sample outlet is connected with the input end of a gas chromatograph through a communicating pipe. The invention provides a system and a method for detecting a sulfur-free odorizing agent, which are more accurate in detection of the sulfur-free odorizing agent compared with the existing mode, can also adsorb and thermally separate out low-concentration sulfur-free odorizing agent for detection, increase the detection range of the sulfur-free odorizing agent, have good detection effect on natural gas leakage, and at least solve the technical problems that when a portable gas chromatograph with a thermal conductivity detector is adopted to detect the field sulfur-free odorizing agent in the prior art, low-concentration samples are difficult to detect, and the detection effect on the natural gas leakage is not ideal.
Description
Technical Field
The invention belongs to the technical field of natural gas detection, and particularly relates to a sulfur-free odorizing agent detection system and method.
Background
The sulfur-free odorizing agent has the same function as the conventional odorizing agent, is a substance capable of playing a warning role, has strong mixing capacity with natural gas, is gaseous in a gas pipeline, is more prominent in warning smell compared with the conventional odorizing agent, cannot corrode the natural gas pipeline and equipment, and cannot harm a human body and the environment during combustion. Therefore, the sulfur-free odorizing agent is widely used for detecting whether a leakage occurs in the natural gas pipeline.
At present, a desk-top gas chromatograph with a Flame Ionization Detector (FID) is adopted for detection and analysis of the sulfur-free odorizing agent, but the desk-top gas chromatograph cannot be applied to field detection carried out on a gas distribution network, so that a portable gas chromatograph with a Thermal Conductivity Detector (TCD) is adopted during field detection. However, the response sensitivity of the Thermal Conductivity Detector (TCD) is inferior to that of the Flame Ionization Detector (FID), and the detection of a low concentration sample is difficult and the detection effect of natural gas leakage is not ideal.
Disclosure of Invention
The invention aims to provide a system and a method for detecting a sulfur-free odorizing agent, which at least solve the technical problems that in the prior art, when a portable gas chromatograph with a thermal conductivity detector is used for detecting the sulfur-free odorizing agent on site, low-concentration samples are difficult to detect, and the detection effect on natural gas leakage is not ideal.
The invention is realized by the following technical scheme:
the invention provides a sulfur-free odorizing agent detection system which comprises a thermal analyzer, wherein the thermal analyzer is provided with a sample inlet, a sample outlet and an exhaust pipe, and the sample outlet is connected with the input end of a gas chromatograph through a communicating pipe.
Further, thermal analysis appearance includes box body, analysis pipe and exhaust gas part, analysis pipe is located the box body, analysis pipe is used for adsorbing, analytic no sulphur odorant, analysis pipe's one end and introduction port intercommunication, the other end and the input intercommunication of appearance mouth and exhaust gas part, exhaust gas part's output and exhaust gas pipe intercommunication.
Further, the analysis pipe includes both ends confined body, be equipped with gas flow pipe and heater block in the body, be equipped with the adsorption material that is used for adsorbing no sulphur odorant on the inner wall of gas flow pipe, gas flow pipe's one end with the introduction port intercommunication, the other end with the outlet with the input intercommunication of exhaust gas part, the heater block is used for heating gas flow pipe.
Further, the inner diameter of the gas flow tube is gradually reduced from the inlet end to the outlet end.
Further, the heater block includes heating ring and heat-conducting layer, the heat-conducting layer parcel is in the outer wall of gas flow pipe, the heating ring cover is established on the heat-conducting layer.
Further, the analytic pipe of analysis includes the analytic pipe of first analytic pipe and second, the one end and the introduction port intercommunication of first analytic pipe, the other end communicates with the one end of the analytic pipe of second and the input of exhaust part, the other end and the appearance mouth intercommunication of the analytic pipe of second, be equipped with the heat insulating board in the box body, first analytic pipe separates through the heat insulating board with the analytic pipe of second.
Further, the exhaust gas part includes exhaust gas suction pipe, exhaust gas conveying pipe and first aspiration pump, the one end of exhaust gas suction pipe with the other end of first analytic pipe with the one end intercommunication of the analytic pipe of second, the other end with the input intercommunication of first aspiration pump, the output of first aspiration pump passes through the exhaust gas conveying pipe with exhaust gas pipe intercommunication, the one end of first analytic pipe through advance the appearance pipe with the introduction port intercommunication, the other end pass through the sample conveying pipe with the one end intercommunication of the analytic pipe of second, the analytic pipe of second the other end with be equipped with the second aspiration pump between the appearance mouth, the analytic pipe of second the other end through arrange the appearance pipe with the input intercommunication of second aspiration pump, the output of second aspiration pump with the appearance mouth intercommunication.
The battery and the controller are fixedly connected in the box body, the digital display screen is fixedly connected on the outer side wall of the box body, a plurality of switches and a charging port used for charging the battery are further arranged on the outer side wall of the box body, the temperature sensor is arranged in the analysis tube, the digital display screen, the battery, the temperature sensor and the plurality of switches are electrically connected with the controller, and the charging port is electrically connected with the battery; the sampling pipe is provided with a first electromagnetic valve, the waste gas suction pipe is provided with a second electromagnetic valve, the sample conveying pipe is provided with a third electromagnetic valve, the sampling pipe is provided with a fourth electromagnetic valve, and the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are electrically connected with the controller.
Further, be equipped with the backup pad in the box body, be used for right analysis tube radiating heat dissipation part and with the radiator grille of heat dissipation part intercommunication, the one end of heat insulating board, first analysis tube and the analytic pipe of second are fixed in the one side of backup pad, heat dissipation part includes radiating fin, radiator fan and radiating motor, radiating fin's one end is fixed in the another side of backup pad, the radiator fan orientation radiating fin, the radiating motor with the inside wall of box body is connected, the output of radiator motor with radiator fan's axle center transmission is connected, through the radiating motor drives radiator fan rotates will heat warp on the radiating fin the radiator grille discharges.
The invention also provides a sulfur-free odorizing agent detection method based on the sulfur-free odorizing agent detection system, which comprises the following steps:
adsorbing the sulfur-free odorizing agent by a thermal analyzer;
carrying out thermal analysis on the adsorbed sulfur-free odorizing agent by a thermal analysis instrument to obtain a concentrated sulfur-free odorizing agent;
the concentrated sulfur-free odorizing agent was subjected to gas chromatography analysis by gas chromatography.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a system and a method for detecting a sulfur-free odorizing agent. Through such technical scheme, it is more accurate to the mode that the detection of no sulphur odorant is current relatively, equally can adsorb to the no sulphur odorant of low concentration, the thermal desorption comes out and detects, increase the detection range to no sulphur odorant, it is good to the detection effect that the natural gas was revealed, solved prior art at least and adopted the portable gas chromatograph who takes the thermal conductivity detector to detect on-the-spot no sulphur odorant, be difficult to detect low concentration sample, the detection effect to the natural gas is less than ideal technical problem.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic view of the configuration of a sulfur-free odorant detection system according to the present invention;
FIG. 2 is a right side view of the thermal analyzer of FIG. 1;
FIG. 3 is a front cross-sectional view of the thermal analyzer of FIG. 1;
FIG. 4 is a right side cross-sectional view of the thermal analyzer of FIG. 1;
FIG. 5 is a cross-sectional view of the resolving tube of FIG. 3;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a thermal analyzer; 2. a digital display screen; 3. a switch; 4. a handle; 5. a waste gas discharge pipe; 6. connecting a rotating head; 7. a sample inlet; 8. a sample outlet; 9. a communicating pipe; 10. a gas chromatograph; 11. a charging port; 12. a heat dissipation grid; 13. a heat insulation plate; 14. a sample inlet pipe; 15. a first solenoid valve; 16. a first desorption tube; 17. an exhaust gas suction pipe; 18. a second solenoid valve; 19. a first air pump; 20. an exhaust gas delivery pipe; 21. a sample delivery tube; 22. a second desorption tube; 23. a sample discharge pipe; 24. a third solenoid valve; 25. a second air pump; 26. a battery; 27. a controller; 28. a support plate; 29. a heat dissipating fin; 30. a heat-dissipating fan; 31. a heat dissipation motor; 32. a pipe body; 33. a mounting seat; 34. a heating ring; 35. a heat conductive layer; 36. a gas flow tube; 37. adsorbing the material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example one
Referring to fig. 1 to 5, the present invention provides a sulfur-free odorant detection system, including a thermal analyzer 1, where the thermal analyzer 1 is provided with a sample inlet 7, a sample outlet 8, and an exhaust pipe 5, and the sample outlet 8 is connected to an input end of a gas chromatograph 10 through a communicating pipe 9.
The sample outlet 8 is detachably connected to the input end of the portable gas chromatograph 10 via a communicating tube 9. Wherein, introduction port 7 is used for advancing the appearance for sample distribution pipe network, the sample of collection enters into thermal analysis appearance 1 through introduction port 7, through thermal analysis appearance 1 with no sulphur odorant absorption, then the thermal analysis is concentrated and is obtained the sample, and other waste gas is discharged through exhaust gas pipe 5, and the sample is through 8 thermal analysis appearance 1 that discharge of appearance mouth, enters into portable gas chromatograph 10, carries out gas chromatography analysis.
The present embodiment provides a sulfur-free odorant detection system, in which a thermal analyzer 1 adsorbs a sulfur-free odorant, interference of other gases is eliminated, the thermal analyzer 1 performs thermal analysis on the adsorbed sulfur-free odorant to obtain a concentrated sulfur-free odorant, and finally, a gas chromatograph 10 performs gas chromatography on the concentrated sulfur-free odorant. Through such technical scheme, it is more accurate to the mode that the detection is current relatively of no sulphur odorant, equally can adsorb to the no sulphur odorant of low concentration, the thermal desorption detects, increase the detection range to no sulphur odorant, detection effect to revealing of natural gas is good, the portable gas chromatograph 10 that has solved prior art adoption band thermal conductivity detector at least detects when on-the-spot no sulphur odorant, be difficult to detect low concentration sample, the detection effect to revealing of natural gas is not ideal technical problem.
As a specific embodiment, the thermal analyzer 1 includes a box body, an analyzing pipe and an exhaust gas discharging component, the analyzing pipe is located in the box body, the analyzing pipe is used for adsorbing and analyzing sulfur-free odorizing agent, one end of the analyzing pipe is communicated with the sample inlet 7, the other end is communicated with the sample outlet 8 and the input end of the exhaust gas discharging component, and the output end of the exhaust gas discharging component is communicated with the exhaust gas discharging pipe 5.
The sample inlet 7, the sample outlet 8 and the exhaust pipe 5 are all arranged on the outer side wall of the box body. Wherein, the sample of gathering enters into the box body through introduction port 7, carries to analytic pipe, adsorbs earlier to the sulfur-free odorizing agent through analytic pipe, then resolves out, and the sample of resolving out discharges through outlet 8. The adsorption and the desorption of the sulfur-free odorizing agent can be facilitated through the desorption pipe, and the device is very efficient and convenient. Wherein, be equipped with on the lateral wall of box body and connect and rotate head 6, the one end of exhaust pipe 5 rotates with being connected and rotates head 6 and be connected for exhaust pipe 5 can connect relatively and rotate head 6 and rotate. Wherein still be equipped with the handle 4 that does benefit to mention the box body on the box body, the both ends of handle 4 rotate with the lateral wall of box body and are connected.
As a specific embodiment, the analysis tube includes a tube body 32 with two closed ends, a gas flow tube 36 and a heating component are arranged in the tube body 32, an adsorbing material 37 for adsorbing the sulfur-free odorizing agent is arranged on the inner wall of the gas flow tube 36, one end of the gas flow tube 36 is communicated with the sample inlet 7, the other end is communicated with the sample outlet 8 and the input end of the exhaust gas component, and the heating component is used for heating the gas flow tube 36.
Wherein the pipe body 32 is cylindrical, the gas flow tube 36 is located at the axial position of the pipe body 32, and the heating member is located between the inner wall of the pipe body 32 and the outer wall of the gas flow tube 36, so that the gas flow tube 36 can be heated by the heating member. The adsorbing material 37 is uniformly laid on the inner wall of the gas flow tube 36, and the adsorbing material 37 may be activated carbon or diatom adsorbent. Connectors communicated with the gas flow tube 3636 are arranged at two ends of the tube body 32, and the connectors at two ends of the tube body 32 are conveniently communicated with the sample inlet 7 and the sample outlet 8. Do benefit to flowing through of sample through the gas flow pipe 36 that sets up, flow through the in-process, adsorb the sulfur-free odorizing agent through adsorbing material 37, after adsorbing the completion, all the other waste gas discharge back, the rethread heating part heats gas flow pipe 36 for the thermal desorption of sulfur-free odorizing agent comes out, forms the sample, thereby does benefit to the separation with sulfur-free odorizing agent and other waste gas, realizes concentrating the extraction of sulfur-free odorizing agent.
In a specific embodiment, the inner diameter of the gas flow tube 36 gradually decreases from the inlet end to the outlet end.
The gas flow pipe 36 has a circular cross section, and the flow surface becomes narrower as the sample flows through the gas flow pipe 36, so that the adsorbing material 37 can more easily adsorb the sulfur-free odorizing agent.
In a specific embodiment, the heating component includes a heating ring 34 and a heat conducting layer 35, the heat conducting layer 35 wraps the outer wall of the gas flow tube 36, and the heating ring 34 is sleeved on the heat conducting layer 35.
The heating ring 34 is an electrical heating metal ring, and generates heat after being electrified. The heat conduction layer 35 is made of heat conduction materials such as quartz sand, so that the gas flow pipe 36 can be heated very uniformly, and the sulfur-free odorizing agent adsorbed in the adsorbing material 37 can be analyzed.
As a specific implementation mode, the analysis tube comprises a first analysis tube 16 and a second analysis tube 22, one end of the first analysis tube 16 is communicated with the sample inlet 7, the other end of the first analysis tube is communicated with one end of the second analysis tube 22 and the input end of the waste gas discharge component, the other end of the second analysis tube 22 is communicated with the sample outlet 8, a heat insulation plate 13 is arranged in the box body, and the first analysis tube 16 and the second analysis tube 22 are separated through the heat insulation plate 13.
The heat insulation plate 13 is horizontally arranged, the box body is divided into an upper layer and a lower layer by the heat insulation plate 13, and the first analysis pipe 16 and the second analysis pipe 22 are respectively positioned in the two layers. The heat insulation plate 13 is used for separating the first desorption pipe 16 and the second desorption pipe 22, so that secondary adsorption desorption is realized, the concentration of the sulfur-free odorizing agent is further improved, and meanwhile, the first desorption pipe 16 and the second desorption pipe 22 are not influenced mutually, and operation is facilitated.
As specific implementation mode, the exhaust part includes exhaust suction pipe 17, exhaust delivery pipe 20 and first aspiration pump 19, the one end of exhaust suction pipe 17 with the other end of first analytic pipe 16 with the one end intercommunication of the analytic pipe 22 of second, the other end with the input intercommunication of first aspiration pump 19, the output of first aspiration pump 19 passes through exhaust delivery pipe 20 with exhaust pipe 5 intercommunication, the one end of first analytic pipe 16 through advance appearance pipe 14 with introduction port 7 intercommunication, the other end pass through sample delivery pipe 21 with the one end intercommunication of the analytic pipe 22 of second, the other end of the analytic pipe 22 of second with be equipped with second aspiration pump 25 between the appearance mouth 8, the other end of the analytic pipe 22 of second through the appearance pipe 23 with the input intercommunication of second aspiration pump 25, the output of second aspiration pump 25 with appearance mouth 8 intercommunication.
The first air pump 19 can extract the waste gas in the first analysis pipe 16 and the second analysis pipe 22 through the waste gas suction pipe 17, and after the sulfur-free odorizing agent is adsorbed by the adsorbing material 37, the first analysis pipe 16 and the second analysis pipe 22 are left as the waste gas, and the waste gas is extracted through the first air pump 19 and then discharged through the exhaust pipe 5, so that the waste gas is favorably discharged, and the interference of the sulfur-free odorizing agent detection is discharged.
After entering through the sample inlet 7, the sample enters the first desorption pipe 16 through the sample inlet pipe 14, flows through the gas flow pipe 36 in the first desorption pipe 16, is adsorbed by the adsorbing material 37, and then the exhaust gas is extracted by the first suction pump 19 and is discharged from the exhaust gas pipe 5. After the exhaust gas is discharged, the first desorption pipe 16 is heated, the sulfur-free odorant is desorbed and released, and the sulfur-free odorant enters the second desorption pipe 22 to be adsorbed and desorbed for the second time, thereby obtaining a sample. The sample is pumped by the second air pump 25 and is conveyed to the sample outlet 8 through the sample discharge pipe 23 to be discharged. The second suction pump 25 can discharge the sulfur-free odorizing agent from the second desorption pipe 22 through the outlet 8.
As a specific implementation manner, the portable electronic device further comprises a control system, the control system comprises a controller 27, a battery 26, a digital display screen 2 and a temperature sensor, the battery 26 and the controller 27 are fixedly connected in the box body, the digital display screen 2 is fixedly connected on the outer side wall of the box body, the outer side wall of the box body is further provided with a plurality of switches 3 and a charging port 11 for charging the battery 26, the temperature sensor is arranged in the analysis tube, the digital display screen 2, the battery 26, the temperature sensor and the plurality of switches 3 are electrically connected with the controller 27, and the charging port 11 is electrically connected with the battery 26; it is equipped with first solenoid valve 15 to advance on the appearance pipe 14, be equipped with second solenoid valve 18 on the waste gas suction tube 17, be equipped with third solenoid valve 24 on the sample conveyer pipe 21, be equipped with the fourth solenoid valve on the row appearance pipe 23, first solenoid valve 15 second solenoid valve 18 third solenoid valve 24 with the fourth solenoid valve all with the controller 27 electricity is connected.
The embodiment is beneficial to controlling the flow direction of the gas, so that the adsorption and the analysis effects on the sulfur-free odorizing agent are better.
Wherein, the sample enters the first analysis tube 16 through the sample inlet 7, and is adsorbed in the first analysis tube 16, when the temperature of the first analysis tube 16 is lower than the preset value, the second electromagnetic valve 18 is opened, and exhaust gas can be sucked and discharged, at this time, the third electromagnetic valve 24 and the fourth electromagnetic valve are closed, and sulfur-free odorizing agent adsorption is performed, after adsorption is finished, the first analysis tube 16 is heated, at this time, the temperature of the first analysis tube 16 is raised, the second electromagnetic valve 18 is closed, the first air pump 19 is closed, and exhaust gas suction is stopped at this time, the third electromagnetic valve 24 is opened, sulfur-free ozone enters the second analysis tube 22, and is adsorbed by the second analysis tube 22, after adsorption is finished, the second electromagnetic valve 18 is opened, exhaust gas is pumped again, then, the second analysis tube 22 is heated again, so that the sulfur-free ozone in the second analysis tube 22 is released, at this time, the second electromagnetic valve 18 and the third electromagnetic valve 24 are closed, the fourth electromagnetic valve is opened, and the released sulfur-free ozone is delivered to the gas chromatograph 10 through the ozone outlet 8 through the second pump 25, and the gas chromatograph 10 is performed.
The digital display screen 2 can display the actual temperature of the first analysis tube 16 and the second analysis tube 22, which is beneficial for control and management. The temperature of the first analysis tube 16 and the second analysis tube 22 can be detected by the temperature sensor, the adsorption and analysis processes can be visually known, and the control of the opening or closing of the first electromagnetic valve 15, the second electromagnetic valve 18, the third electromagnetic valve 24 and the fourth electromagnetic valve is facilitated.
As a specific embodiment, a vertically arranged support plate 28, a heat dissipation component for dissipating heat of the analysis tube, and a heat dissipation grid 12 communicated with the heat dissipation component are arranged in the box body, one end of the thermal baffle 13, the first analysis tube 16, and the second analysis tube 22 are fixed on one surface of the support plate 28, the heat dissipation component includes a heat dissipation fin 29, a heat dissipation fan 30, and a heat dissipation motor 31, one end of the heat dissipation fin 29 is fixed on the other surface of the support plate 28, the heat dissipation fan 30 faces the heat dissipation fin 29, the heat dissipation motor 31 is connected with the inner side wall of the box body, the output end of the heat dissipation motor 31 is in transmission connection with the axis of the heat dissipation fan 30, and the heat dissipation motor 31 drives the heat dissipation fan 30 to rotate to discharge heat on the heat dissipation fin 29 through the heat dissipation grid 12.
This embodiment can accelerate the heat dissipation of analytic pipe through setting up the radiating part, does benefit to and detects the use next time, improves detection efficiency.
The supporting plate 28 is vertically disposed in the box body, and divides the box body into an adsorption and desorption region and a heat dissipation region, and the heat insulation plate 13 is located in the adsorption and desorption region. The heat dissipation fins 29 absorb the heat transferred from the support plate 28, so that the heat dissipation of the first analysis tube 16 and the second analysis tube 22 can be accelerated, the heat absorbed by the heat dissipation fins 29 can be quickly sucked by the heat dissipation fan 30, and the heat can be quickly dissipated by being discharged out of the box body through the heat dissipation grid 12. The support plate 28 is used for fixing the first and second desorption tubes 16 and 22.
Example two
The invention also provides a sulfur-free odorizing agent detection method based on the sulfur-free odorizing agent detection system, which comprises the following steps:
adsorbing the sulfur-free odorizing agent by a thermal analyzer 1;
carrying out thermal analysis on the adsorbed sulfur-free odorizing agent by a thermal analyzer 1 to obtain a concentrated sulfur-free odorizing agent;
the concentrated sulfur-free odorizing agent was subjected to gas chromatography analysis by the gas chromatograph 10.
It will be understood by those skilled in the art that all or part of the steps of the above facts and methods can be implemented by hardware related to instructions of a program, and the related program or the program can be stored in a computer readable storage medium, and when executed, the program includes the following steps: corresponding method steps are introduced, and the storage medium can be ROM/RAM, magnetic disk, optical disk, etc
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The sulfur-free odorizing agent detection system is characterized by comprising a thermal analyzer, wherein the thermal analyzer is provided with a sample inlet, a sample outlet and an exhaust gas exhaust pipe, and the sample outlet is connected with the input end of a gas chromatograph through a communicating pipe.
2. The sulfur-free odorizing agent detecting system according to claim 1, wherein the thermal analyzer comprises a box body, an analyzing pipe and an exhaust component, the analyzing pipe is located in the box body and used for adsorbing and analyzing sulfur-free odorizing agent, one end of the analyzing pipe is communicated with the sample inlet, the other end of the analyzing pipe is communicated with the sample outlet and the input end of the exhaust component, and the output end of the exhaust component is communicated with the exhaust pipe.
3. The system according to claim 2, wherein the desorption tube comprises a tube body with both ends closed, a gas flow tube and a heating member are disposed in the tube body, an adsorbing material for adsorbing the sulfur-free odorizing agent is disposed on an inner wall of the gas flow tube, one end of the gas flow tube is communicated with the sample inlet, the other end of the gas flow tube is communicated with the sample outlet and the input end of the exhaust gas unit, and the heating member is configured to heat the gas flow tube.
4. The sulfur-free odorizing agent detecting system according to claim 3, wherein an inner diameter of the gas flow pipe gradually decreases from one end of the intake air to one end of the outlet air.
5. The sulfur-free odorizing agent detection system according to claim 3, wherein the heating member includes a heating ring and a heat conductive layer, the heat conductive layer is wrapped around an outer wall of the gas flow pipe, and the heating ring is fitted over the heat conductive layer.
6. The sulfur-free odorizing agent detecting system according to claim 2, wherein the desorption pipe includes a first desorption pipe and a second desorption pipe, one end of the first desorption pipe is communicated with the sample inlet, the other end of the first desorption pipe is communicated with one end of the second desorption pipe and the input end of the exhaust gas discharging part, the other end of the second desorption pipe is communicated with the sample outlet, a heat insulation plate is arranged in the box body, and the first desorption pipe and the second desorption pipe are separated by the heat insulation plate.
7. The sulfur-free odorizing agent detecting system according to claim 6, wherein the exhaust gas discharging component includes an exhaust gas suction pipe, an exhaust gas conveying pipe, and a first air pump, one end of the exhaust gas suction pipe communicates with the other end of the first desorption pipe and one end of the second desorption pipe, the other end communicates with an input end of the first air pump, an output end of the first air pump communicates with the exhaust gas pipe through the exhaust gas conveying pipe, one end of the first desorption pipe communicates with the sample inlet through a sample inlet pipe, the other end communicates with one end of the second desorption pipe through a sample conveying pipe, a second air pump is provided between the other end of the second desorption pipe and the sample outlet, the other end of the second desorption pipe communicates with an input end of the second air pump through a sample discharge pipe, and an output end of the second air pump communicates with the sample outlet.
8. The sulfur-free odorizing agent detecting system according to claim 7, further comprising a control system, wherein the control system comprises a controller, a battery, a digital display screen and a temperature sensor, the battery and the controller are fixedly connected inside the cartridge body, the digital display screen is fixedly connected on the outer side wall of the cartridge body, a plurality of switches and a charging port for charging the battery are further arranged on the outer side wall of the cartridge body, the temperature sensor is arranged inside the desorption tube, the digital display screen, the battery, the temperature sensor and the plurality of switches are electrically connected with the controller, and the charging port is electrically connected with the battery; the sampling pipe is provided with a first electromagnetic valve, the waste gas suction pipe is provided with a second electromagnetic valve, the sample conveying pipe is provided with a third electromagnetic valve, the sampling pipe is provided with a fourth electromagnetic valve, and the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are electrically connected with the controller.
9. The sulfur-free odorant detection system according to claim 6, wherein a support plate, a heat dissipation member for dissipating heat from the desorption tube, and a grill communicating with the heat dissipation member are disposed in the case, one end of the thermal insulation plate, the first desorption tube, and the second desorption tube are fixed to one surface of the support plate, the heat dissipation member comprises a heat dissipation fin, a heat dissipation fan, and a heat dissipation motor, one end of the heat dissipation fin is fixed to the other surface of the support plate, the heat dissipation fan faces the heat dissipation fin, the heat dissipation motor is connected to an inner side wall of the case, an output end of the heat dissipation motor is in transmission connection with an axial center of the heat dissipation fan, and the heat dissipation motor drives the heat dissipation fan to rotate so as to discharge heat from the heat dissipation fin through the grill.
10. A sulfur-free odorant detection method according to the sulfur-free odorant detection system according to any one of claims 1 to 9, comprising:
adsorbing the sulfur-free odorizing agent by a thermal analyzer;
carrying out thermal analysis on the adsorbed sulfur-free odorizing agent by a thermal analysis instrument to obtain a concentrated sulfur-free odorizing agent;
the concentrated sulfur-free odorizing agent was subjected to gas chromatography analysis by gas chromatography.
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