CN108226368B - Full-automatic total benzene analyzer - Google Patents
Full-automatic total benzene analyzer Download PDFInfo
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- CN108226368B CN108226368B CN201810042230.2A CN201810042230A CN108226368B CN 108226368 B CN108226368 B CN 108226368B CN 201810042230 A CN201810042230 A CN 201810042230A CN 108226368 B CN108226368 B CN 108226368B
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 239000007789 gas Substances 0.000 claims abstract description 56
- 239000012159 carrier gas Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 24
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims description 48
- 238000000926 separation method Methods 0.000 claims description 32
- 230000001276 controlling effect Effects 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000003795 desorption Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 7
- 238000001819 mass spectrum Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 239000000306 component Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001917 fluorescence detection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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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
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- 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
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8804—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 automated systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a full-automatic total benzene analyzer, which comprises a main panel, a valve switching module, a chromatographic column, a heating and cooling module, a gas interface, a detector, a power supply, an MCU control and communication module and a shell, wherein the main panel is provided with a power switch, a flow regulating valve, a flowmeter and a temperature controller, the heating and cooling module comprises a heating and temperature-raising component and a cooling and temperature-lowering component, the gas interface comprises a standard gas interface, a zero gas interface, a carrier gas interface, a sample gas interface, a detector waste discharge interface and a sample gas waste discharge interface, and the MCU control and communication module is respectively and electrically communicated with a computer, the main panel, the valve switching module, the heating and cooling module and the detector. The invention belongs to the technical field of detection instruments, and particularly provides an instrument which is wide in application, has extremely high detection sensitivity, is convenient to operate and can continuously detect the total benzene content in gas.
Description
Technical Field
The invention belongs to the technical field of detection instruments, and particularly relates to a full-automatic total benzene analyzer.
Background
Total benzene generally comprises benzene, toluene, ethylbenzene, xylene, cumene, styrene and other compounds, and besides benzene, which is a known carcinogen, other compounds have different degrees of toxicity to human and living beings. At present, benzene series in the atmosphere are usually detected by a gas chromatograph after being adsorbed by active carbon at normal temperature, thermally desorbed or desorbed by carbon disulfide solvent. Wherein the steps of adsorption, thermal desorption and the like are all manually operated, and time and labor are wasted. If the direct detection cannot be detected because the sensitivity does not reach the detection limit, continuous detection and online detection cannot be realized.
Disclosure of Invention
In order to solve the existing problems, the invention provides an instrument which has wide application, extremely high detection sensitivity and convenient operation and can continuously detect the total benzene content in gas.
The technical scheme adopted by the invention is as follows: the invention discloses a full-automatic total benzene analyzer, which comprises a main panel, a valve switching module, a chromatographic column, a heating and cooling module, a gas interface, a detector, a power supply, an MCU control and communication module and a shell, wherein the main panel is arranged on a front panel of the shell, the valve switching module, the chromatographic column, the heating and cooling module, the gas interface, the detector, the power supply, the MCU control and communication module are arranged in the shell, the heating and cooling module is arranged at a position close to the chromatographic column, a power switch, a flow regulating valve, a flowmeter and a temperature controller are arranged on the main panel, the temperature controller is respectively and electrically communicated with the detector and the chromatographic column, the valve switching module comprises an electromagnetic valve, the gas interface is connected with an air inlet pipeline, the electromagnetic valve is arranged on the air inlet pipeline and is communicated with the chromatographic column, the chromatographic column is connected with the detector, the heating and cooling module comprises a standard gas interface, a zero gas interface, a carrier gas interface, a sample gas interface, a detector waste discharge interface and a sample gas discharge interface, and the MCU control and communication module are respectively and electrically communicated with a computer, the main panel, the valve switching module, the heating and the detector.
The main panel is equipped with switch, flow control valve, flowmeter and three temperature controllers for the flow control of sample gas and carrier gas, and three temperature controllers are used for adjusting detector, separation chromatographic column and adsorption chromatographic column temperature.
After the power switch of the main panel is turned on, the main machine is powered on, the temperature controller works, and the main panel is provided with LED digital display.
The gas interface comprises a standard gas interface, a zero gas interface, a carrier gas interface, a sample gas interface, a detector waste discharge interface and a sample gas waste discharge interface. The gas enters the instrument through the part, and the detected and treated gas is connected into the waste discharge pipeline through the part.
The valve switching module, the chromatographic column, the heating and cooling module, the gas interface, the detector, the power supply, the MCU control and communication module are arranged in the shell, and preferably, the valve switching module and the chromatographic column are arranged at the upper layer in the shell, the detector is arranged at the middle layer in the shell, and the power supply and the MCU control and communication module are arranged at the lower layer in the shell.
Further, the flow regulating valve comprises a baseline flow regulator and a sample injection flow regulator; the flowmeter includes a detector flowmeter and an adsorption flowmeter; the temperature controller comprises an adsorption column temperature controller, a detector temperature controller and a base line control temperature controller;
the baseline flow regulator is used for regulating the flow of the carrier gas, the carrier gas passes through the regulating valve after being stabilized in pressure, the carrier gas is set to 80-100mL/min, and the carrier gas flows through the detector flowmeter after being regulated;
the sample injection flow regulator is used for regulating the flow when the carrier gas is injected, the carrier gas is regulated in pressure and then passes through the regulating valve to be set to 80-100mL/min, and the carrier gas flows through the chromatographic column after regulation and then enters the detector;
the detector flowmeter is used for displaying the flow rate of the carrier gas entering the detector, the carrier gas enters the detector flowmeter through the baseline flow regulator or the sample flow regulator after being stabilized, the flow rate of the carrier gas is set to be 80-100mL/min, and the carrier gas flows through the separation chromatographic column or the adsorption chromatographic column after being regulated and then enters the detector;
the adsorption flowmeter is used for displaying the flow of the sample gas entering the separation column, the sample gas enters the adsorption flowmeter through the valve switching module after being stabilized, the flow of the sample gas after adjustment is set to be 200-1500mL/min, and the sample gas flows through the separation chromatographic column;
the adsorption column temperature controller is used for displaying and controlling the temperature of the separation column, the temperature of the separation column is controlled at room temperature during the adsorption process, and desorption is carried out at 200-400 ℃ according to the characteristic of the column during sample injection;
the temperature controller of the detector is used for displaying and controlling the temperature of the detector, the set temperature is 5-20 ℃, the constant temperature is kept, and the background thermal noise of the detector is ensured to be minimum;
the base line control temperature controller is used for displaying and controlling the temperature of the adsorption column, the carrier gas enters the adsorption chromatographic column after the flow rate is regulated, the adsorption chromatographic column is controlled to be at a constant temperature by the temperature controller, and then the carrier gas is controlled to be in a state without impurities, constant temperature and constant current, so that the base line is ensured to be stable.
Further, the electromagnetic valve is provided with 7 solenoid valves. Of course, the solenoid valves can be arranged in relevant quantity according to the requirement, and the valve refers to a solenoid valve or a plane valve.
Further, the chromatographic column comprises a separation chromatographic column and an adsorption chromatographic column, including one or both.
Further, the heating and temperature-raising component is an adsorption column heating coil and a separation column heating coil, and the cooling component is a centrifugal fan; the adsorption column heating coil is arranged on the adsorption chromatographic column, and the separation column heating coil is arranged on the separation chromatographic column; and an air outlet of the centrifugal fan is arranged at a position close to the separation chromatographic column. The sample is subjected to operations such as adsorption, thermal desorption and sample injection in the module. The adsorption column heating coil is used for adjusting the constant temperature and the constant resistance of the carrier gas, and the separation column heating coil is used for thermal desorption. The centrifugal fan can quickly cool the temperature of the separation chromatographic column to room temperature.
Further, the detector comprises a detector main body, a chromatographic column SSR, a detector cooling fan, an ultraviolet lamp power supply, a reaction chamber, a membrane dryer and a detection control circuit, wherein the detector cooling fan is arranged at a position close to the detector main body, the ultraviolet lamp power supply is electrically communicated with the ultraviolet lamp, and the detection control circuit is electrically communicated with the detector main body, the chromatographic column SSR, the detector cooling fan, the ultraviolet lamp power supply, the reaction chamber and the membrane dryer respectively.
Preferably, the detector body is one of an ultraviolet fluorescence detector, a hydrogen flame ionization detector and a mass spectrum detector.
The detector is a core component for benzene detection, and the detector is an ultraviolet fluorescence detector, a hydrogen Flame Ionization Detector (FID) or a Mass Spectrum (MS) detector. The ultraviolet fluorescence detector has the advantages of high detection sensitivity, strong detection specificity, small volume, stable performance and the like.
Further, the power supply comprises a valve group power supply, a detector and an MCU control power supply. The power supply provides various direct current power supplies of the instrument, and the microcontroller unit (MCU) is responsible for analyzing the commands of the upper computer and executing various processing commands and is responsible for communicating with the upper computer to transmit the signal values of the detector.
Further, the MCU control and communication module comprises an MCU control and communication circuit and a detector high-voltage circuit.
Further, a logo part is arranged on the main panel. The logo portion displays the instrument logo and instrument model.
The beneficial effects obtained by the invention by adopting the structure are as follows: the full-automatic total benzene analyzer has the advantages of reasonable structural design, small volume, independent installation, convenient operation, wide application, extremely high detection sensitivity and capability of continuously detecting the total benzene content in gas. The scheme integrates on-line sampling, pressure flow adjustment, normal temperature adsorption, high temperature desorption, sample injection, analysis and storage report and integrates thermal desorption and ultraviolet fluorescence detection technology, and the detection sensitivity reaches the PPT level. Satisfies the routine and on-line benzene analysis of environmental detection, food carbon dioxide and the like. The invention can be widely used for gas environment detection stations, and can continuously and online detect the benzene content in the atmosphere. The method can be used for detecting the benzene content on line in real time and controlling the carbon dioxide process detection and finished product detection of foods and guiding production.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a fully automatic total benzene analyzer according to the present invention;
FIG. 2 is an exploded view of the fully automatic total benzene analyzer of the present invention;
FIG. 3 is a schematic view of the main panel structure of the fully automatic total benzene analyzer of the present invention;
FIG. 4 is a schematic diagram of the valve switching module and chromatographic column of the fully automatic total benzene analyzer of the present invention;
FIG. 5 is a schematic diagram of the detector structure of the fully automatic total benzene analyzer of the present invention;
FIG. 6 is a schematic diagram of the MCU control and communication module of the full-automatic total benzene analyzer;
FIG. 7 is a block diagram showing the operation of the fully automatic total benzene analyzer of the present invention;
FIG. 8 is a block diagram of the operational flow of the fully automatic total benzene analyzer of the present invention.
Wherein 1, main panel, 2, valve switching module, 3, chromatographic column, 4, heating and cooling module, 5, gas interface, 6, detector, 7, power supply, 8, MCU control and communication module, 9, cabinet, 10, power switch, 11, flow regulating valve, 12, flowmeter, 13, temperature controller, 14, solenoid valve, 15, heating and warming component, 16, cooling component, 17, baseline flow regulator, 18, sample flow regulator, 19, detector flowmeter, 20, adsorption flowmeter, 21, adsorption column temperature controller, 22, detector temperature controller, 23, baseline control temperature controller, 24, separation chromatographic column, 25, adsorption chromatographic column, 26, detector body, 27, chromatographic column SSR,28, detector SSR,29, detector cooling fan, 30, ultraviolet lamp, 31, ultraviolet lamp power supply, 32, reaction chamber, 33, membrane dryer, 34, detection control circuit, 35, detector bracket, 36, valve group power supply, 37, detector and MCU control power supply, 38, MCU control and communication circuit, 39, detector high voltage circuit 40, go section.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-2, the full-automatic total benzene analyzer of the invention comprises a main panel 1, a valve switching module 2, a chromatographic column 3, a heating and cooling module 4, a gas interface 5, a detector 6, a power supply 7, an MCU control and communication module 8 and a casing 9, wherein the main panel 1 is arranged on the front panel of the casing 9, the valve switching module 2, the chromatographic column 3, the heating and cooling module 4, the gas interface 5, the detector 6, the power supply 7 and the MCU control and communication module 8 are arranged in the casing 9, the heating and cooling module 4 is arranged at a position close to the chromatographic column 3, as shown in fig. 3, a power switch 10, a flow regulating valve 11, a flowmeter 12 and a temperature controller 13 are arranged on the main panel 1, the temperature controller 13 is respectively and electrically communicated with the detector 6 and the chromatographic column 3, the valve switching module 2 comprises an electromagnetic valve 14, the gas interface 5 is connected with an air inlet pipeline, the electromagnetic valve 14 is arranged on the air inlet pipeline, the air inlet pipeline is communicated with the chromatographic column 3, the chromatographic column 3 is connected with the detector 6, the heating and cooling module 4 comprises a heating and cooling component 15 and a cooling component 16, the gas interface 5 comprises a zero interface, a gas interface, a sample outlet and a sample controller and an exhaust interface 2 are respectively communicated with the main controller and the MCU controller 4.
Wherein, as shown in fig. 4, the flow regulating valve 11 comprises a baseline flow regulator 17 and a sample feeding flow regulator 18; the flow meter 12 includes a detector flow meter 19 and an adsorption flow meter 20; the temperature controller 13 comprises an adsorption column temperature controller 21, a detector temperature controller 22 and a base line control temperature controller 23;
the baseline flow regulator 17 is used for regulating the flow of the carrier gas, the carrier gas passes through the regulating valve after being stabilized in pressure, the carrier gas is set to 80-100mL/min, and the carrier gas after being regulated flows through the detector flowmeter 19;
the sample injection flow regulator 18 is used for regulating the flow rate when the carrier gas is injected, the carrier gas is regulated in pressure and then passes through the regulating valve to be set to 80-100mL/min, and the carrier gas flows through the chromatographic column 3 after regulation and then enters the detector 6;
the detector flowmeter 19 is used for displaying the flow rate of the carrier gas entering the detector 6, the carrier gas enters the detector flowmeter 19 through the baseline flow regulator 17 or the sample flow regulator 18 after being stabilized, the carrier gas is set to 80-100mL/min, and the carrier gas enters the detector 6 after flowing through the separation chromatographic column 24 or the adsorption chromatographic column 25 after being regulated;
the adsorption flowmeter 20 is used for displaying the flow of the sample gas entering the separation column, the sample gas enters the adsorption flowmeter 20 through the valve switching module 2 after being stabilized, the flow of the sample gas after adjustment is set to be 200-1500mL/min, and the sample gas flows through the separation chromatographic column 24;
the adsorption column temperature controller 21 is used for displaying and controlling the temperature of the separation column, controlling the temperature of the separation column at room temperature during an adsorption process, and setting the temperature at 200-400 ℃ for desorption according to the characteristics of the column during sample injection;
the detector temperature controller 22 is used for displaying and controlling the temperature of the detector 6, setting the temperature to be 5-20 ℃, keeping constant temperature and ensuring the minimum background thermal noise of the detector;
the baseline control temperature controller 23 is used for displaying and controlling the temperature of the adsorption column, the carrier gas enters the adsorption chromatographic column 25 after the flow rate is regulated, the adsorption chromatographic column 25 is controlled to be at a constant temperature by the temperature controller, and then the carrier gas is controlled to be in a state of no impurity, constant temperature and constant current, so that the baseline is ensured to be stable.
As shown in fig. 4, the solenoid valve 14 is provided with 7 solenoid valves. The chromatographic column 3 comprises a separation chromatographic column 24 and an adsorption chromatographic column 25. The heating and temperature-raising component 15 is an adsorption column heating coil and a separation column heating coil, and the cooling and temperature-lowering component 16 is a centrifugal fan; the adsorption column heating coil is arranged on the adsorption chromatographic column 25, and the separation column heating coil is arranged on the separation chromatographic column 24; the air outlet of the centrifugal fan is arranged at a position close to the separation chromatographic column 24. The detector 6 comprises a detector body 26, a chromatographic column SSR27, a detector SSR28, a detector cooling fan 29, an ultraviolet lamp 30, an ultraviolet lamp power supply 31, a reaction chamber 32, a membrane dryer 33 and a detection control circuit 34, wherein the detector cooling fan is arranged at a position close to the detector body 26, the ultraviolet lamp power supply 31 is electrically communicated with the ultraviolet lamp 30,
as shown in fig. 5, the detection control circuit 34 is in electrical communication with the detector main body 26, the chromatographic column SSR27, the detector SSR28, the detector cooling fan 29, the ultraviolet lamp power supply 31, the reaction chamber, and the membrane dryer 33, respectively, and the detector 6 further includes a detector holder 35, and the detector main body 26 is disposed on the detector holder 35. The detector body 26 is one of an ultraviolet fluorescent detector, a hydrogen flame ionization detector, and a mass spectrum detector. As shown in fig. 6, the power supply 7 includes a valve block power supply 36, a detector, and an MCU control power supply 37. The MCU control and communication module 8 includes an MCU control and communication circuit 38, a detector high voltage circuit 39. The main panel 1 is provided with a logo 40.
In specific use, as shown in fig. 8, the steps of zeroing, baseline evaluation, adsorption, nitrogen protection, temperature rising and maintaining, sample introduction, cooling and computer storage are required, as shown in fig. 7, in use, a detector is communicated with the MCU control and communication module 8 through a computer, gas is controlled to enter the instrument through the gas interface 5, and the gas passes through the pressure and flow regulation, the valve switching module 2, reaches the chromatographic column 3, enters the detector 6 for detection after being heated and cooled on the chromatographic column 3, and finally, the data is transmitted to the computer for reading and storage.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (9)
1. A full-automatic total benzene analysis appearance, its characterized in that: the device comprises a main panel, a valve switching module, a chromatographic column, a heating and cooling module, a gas interface, a detector, a power supply, an MCU control and communication module and a shell, wherein the main panel is arranged on the front panel of the shell, the valve switching module, the chromatographic column, the heating and cooling module, the gas interface, the detector, the power supply, the MCU control and communication module are arranged in the shell, the heating and cooling module is arranged at a position close to the chromatographic column, the main panel is provided with a power switch, a flow regulating valve, a flowmeter and a temperature controller, the temperature controller is respectively and electrically communicated with the detector and the chromatographic column, the valve switching module comprises an electromagnetic valve, the gas interface is connected with an air inlet pipeline, the electromagnetic valve is arranged on the air inlet pipeline, the air inlet pipeline is communicated with the chromatographic column, the chromatographic column is connected with the detector, the heating and cooling module comprises a heating and temperature-reducing part, the gas interface comprises a standard gas interface, a zero gas interface, a carrier gas interface, a sample gas interface, a detector waste discharge interface and a sample gas discharge interface, and the MCU control and communication module are respectively and electrically communicated with a computer, the main panel, the valve switching module, the heating and the detector;
the valve switching module and the chromatographic column are arranged at the upper layer in the shell, the detector is arranged at the middle layer in the shell, and the power supply and the MCU control and communication module are arranged at the lower layer in the shell;
the flow regulating valve comprises a baseline flow regulator and a sample injection flow regulator; the flowmeter includes a detector flowmeter and an adsorption flowmeter; the temperature controller comprises an adsorption column temperature controller, a detector temperature controller and a base line control temperature controller;
the baseline flow regulator is used for regulating the flow of the carrier gas, the carrier gas passes through the regulating valve after being stabilized in pressure, the carrier gas is set to 80-100mL/min, and the carrier gas flows through the detector flowmeter after being regulated;
the sample injection flow regulator is used for regulating the flow rate when the carrier gas is injected, and after the carrier gas is stabilized in pressure, the carrier gas passes through the regulating valve and is set to 80-100mL/min, and after the carrier gas is regulated, the carrier gas flows through the chromatographic column and then enters the detector;
the detector flowmeter is used for displaying the flow rate of the carrier gas entering the detector, the carrier gas enters the detector flowmeter through the baseline flow regulator or the sample flow regulator after being stabilized, the flow rate of the carrier gas is set to be 80-100mL/min, and the carrier gas flows through the chromatographic column after being regulated and then enters the detector;
the adsorption flowmeter is used for displaying the flow of the sample gas entering the separation column, the sample gas enters the adsorption flowmeter through the valve switching module after being stabilized, the flow of the sample gas after adjustment is set to be 200-1500mL/min, and the sample gas flows through the chromatographic column;
the adsorption column temperature controller is used for displaying and controlling the temperature of the separation column, the temperature of the separation column is controlled at room temperature during an adsorption process, and desorption is carried out at 200-400 ℃ according to the characteristic of the column during sample injection;
the temperature controller of the detector is used for displaying and controlling the temperature of the detector, setting the temperature to be 5-20 ℃, keeping constant temperature and ensuring the minimum background thermal noise of the detector;
the base line control temperature controller is used for displaying and controlling the temperature of the adsorption column, the carrier gas enters the chromatographic column after the flow rate is regulated, the chromatographic column is controlled to be at a constant temperature by the temperature controller, and then the carrier gas is controlled to be in a state without impurities, constant temperature and constant current, so that the base line is ensured to be stable.
2. The fully automatic total benzene analyzer as claimed in claim 1, wherein: the electromagnetic valve is provided with 7 solenoid valves.
3. The fully automatic total benzene analyzer as claimed in claim 1, wherein: the chromatographic column comprises a separation chromatographic column and an adsorption chromatographic column.
4. A fully automated total benzene analyzer according to claim 1 or 3, wherein: the heating and temperature-raising component is an adsorption column heating coil and a separation column heating coil, and the cooling component is a centrifugal fan; the adsorption column heating coil is arranged on the adsorption chromatographic column, and the separation column heating coil is arranged on the separation chromatographic column; and an air outlet of the centrifugal fan is arranged at a position close to the separation chromatographic column.
5. The fully automatic total benzene analyzer as claimed in claim 1, wherein: the detector comprises a detector main body, a chromatographic column SSR, a detector cooling fan, an ultraviolet lamp power supply, a reaction chamber, a membrane dryer and a detection control circuit, wherein the detector cooling fan is arranged at a position close to the detector main body, the ultraviolet lamp power supply is electrically communicated with the ultraviolet lamp, the detection control circuit is respectively electrically communicated with the detector main body, the chromatographic column SSR, the detector cooling fan, the ultraviolet lamp power supply, the reaction chamber and the membrane dryer, and the detector further comprises a detector support, wherein the detector main body is arranged on the detector support.
6. The fully automatic total benzene analyzer as claimed in claim 5, wherein: the detector body is one of an ultraviolet fluorescence detector, a hydrogen flame ionization detector and a mass spectrum detector.
7. The fully automatic total benzene analyzer as claimed in claim 1, wherein: the power supply comprises a valve group power supply, a detector and an MCU control power supply.
8. The fully automatic total benzene analyzer as claimed in claim 1, wherein: the MCU control and communication module comprises an MCU control and communication circuit and a detector high-voltage circuit.
9. The fully automatic total benzene analyzer as claimed in claim 1, wherein: and the main panel is provided with a logo part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042230.2A CN108226368B (en) | 2018-01-17 | 2018-01-17 | Full-automatic total benzene analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042230.2A CN108226368B (en) | 2018-01-17 | 2018-01-17 | Full-automatic total benzene analyzer |
Publications (2)
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| CN107063834A (en) * | 2017-03-30 | 2017-08-18 | 河北工业大学 | The online concentrating instrument of low concentration foul gas and online test method |
| CN207689443U (en) * | 2018-01-17 | 2018-08-03 | 韩军 | A kind of full-automatic total benzene analyzer |
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| JPH10339725A (en) * | 1997-06-07 | 1998-12-22 | Horiba Ltd | Measuring device for atmospheric contamination harmful substance |
| CN104764848A (en) * | 2015-04-22 | 2015-07-08 | 上海华爱色谱分析技术有限公司 | Gas chromatograph for gas analysis in production field |
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