CN107290466A - A kind of NMHC instrumentation - Google Patents

A kind of NMHC instrumentation Download PDF

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Publication number
CN107290466A
CN107290466A CN201710457014.XA CN201710457014A CN107290466A CN 107290466 A CN107290466 A CN 107290466A CN 201710457014 A CN201710457014 A CN 201710457014A CN 107290466 A CN107290466 A CN 107290466A
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CN
China
Prior art keywords
gas
gas circuit
air
nmhc
interface
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Pending
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CN201710457014.XA
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Chinese (zh)
Inventor
芦志强
鹿建森
王亚
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Hefei Gu Tai Automation Co Ltd
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Hefei Gu Tai Automation Co Ltd
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Priority to CN201710457014.XA priority Critical patent/CN107290466A/en
Publication of CN107290466A publication Critical patent/CN107290466A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02Column chromatography
    • G01N30/62Detectors specially adapted therefor
    • G01N30/64Electrical detectors
    • G01N30/68Flame ionisation detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02Column chromatography

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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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

The invention discloses a kind of NMHC instrumentation, including housing, air-channel system, clack box, post case, the first hydrogen flameionization monitor, the second hydrogen flameionization monitor and communication system are provided with housing.The present invention is detected to total hydrocarbon content and methane content simultaneously using dual detector, concentration value with regard to NMHC can be drawn, so greatly shorten the time of single detection, and communication system is provided with instrument, and then pass through computer operation, detection mode of operation to instrument is configured, for example with periodicity (different cycles duration) or continuation, or set time point detection.In addition, the present invention is additionally arranged gas knot screen, the solid impurity in sample gas can be removed, prevent it from producing influence to combustion testing, gas flowmeter can effectively control the input quantity of carrier gas, strictly control its ratio with sample gas amount, help to increase the sensitivity of instrument.

Description

A kind of NMHC instrumentation
Technical field
The present invention relates to NMHC detection field, and in particular to a kind of NMHC instrumentation.
Background technology
NMHC typically refer in addition to methane all volatilizable hydrocarbons (be wherein mainly C2~ C8).NMHC in air exceedes finite concentration, in addition to directly to human health, under certain condition through daylight Irradiation can also produce photochemical fog, and environment and the mankind are caused harm.The on-line checking of polymorphic type is occurred in that in the market The instrument of NMHC, the principle of detection is to stationary source using double injection port, double chromatographic columns, the methods of dual detector NMHC in exhaust is detected, total hydrocarbon content, another root chromatogram column are detected with a root chromatogram column and a detector Methane and non-methane are separated, methane content is obtained by second detector detection by the methane of chromatographic column, both differences are For the content of NMHC.
Flame ionization ditector is using hydrogen and the flame of air burning generation as the energy, when organic compound enters With hydrogen and the flame of oxygen combustion, chemi-ionization is produced at high temperature, and ionization produces the ion of several orders of magnitude higher than base flow, Under the orientation of high voltage electric field, ion stream is formed, faint ion stream is amplified by high resistant, as with entering having for flame The electric signal that machine chemical combination object amount is directly proportional, therefore quantitative analysis can be carried out to organic matter according to the size of signal.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of NMHC instrumentation, instrument combination calculating Machine software systems, having the advantages that detection, accuracy is high, simple to operate and efficiency high.
The technical problems to be solved by the invention are realized using following technical scheme:
Air-channel system, clack box, post case, first are provided with a kind of NMHC instrumentation, including housing, the housing Hydrogen flameionization monitor, the second hydrogen flameionization monitor and communication system,
The air-channel system includes Primordial Qi sampling gas circuit, carrier gas conveying gas circuit, driving force gas circuit and detection gas circuit, and Primordial Qi Sampling gas circuit, carrier gas conveying gas circuit, driving force gas circuit and detection gas circuit are all connected to clack box;
Ten-way valve, the first quantitative loop and the second quantitative loop are provided with the clack box, the ten-way valve is provided with Primordial Qi sampling gas Road interface, the first quantitative ring interface A, carrier gas conveying air-path interface A, the first hydrogen flameionization monitor interface, first quantify Ring interface B, the second quantitative ring interface A, carrier gas conveying air-path interface B, the second hydrogen flameionization monitor interface, second quantify Ring interface B and driving force air-path interface;
A methane packed column and a total hydrocarbon packed column, methane packed column and the first hydrogen fire are provided with the post case Flame ionization monitor connection, total hydrocarbon packed column and the connection of the second hydrogen flameionization monitor;
The communication system is connected with the air-channel system and clack box, for control air-channel system work and clack box in ten Port valve is led to.
Further improvement is that, the Primordial Qi sampling gas circuit is provided with gas knot screen.
Further improvement is that, the carrier gas conveying gas circuit is provided with triple valve, and carrier gas conveying gas circuit is divided into by triple valve It is connected after two with ten-way valve, and is equipped with every a gas flowmeter.
Further improvement is that, the driving force gas circuit is provided with air pump and pressure sensor.
Further improvement is that, be provided with breather pipe between the air pump and pressure sensor, the breather pipe with it is outer Boundary is connected, and provided with switch on breather pipe.
Further improvement is that, the communication system includes
Signaling module, for receiving the command signal that computer is sent, and
Analysis module, is analyzed and processed for the signal to receiving, and
Control module, the work led to each instrument on air-channel system for controlling ten-way valve.
The beneficial effects of the invention are as follows:Instrument uses dual detector to be detected simultaneously to total hydrocarbon content and methane content, Concentration value with regard to that can draw NMHC, is so greatly shortened in the time of single detection, and instrument provided with communication System, and then by computer operation, the detection mode of operation to instrument is configured, for example with periodicity (different cycles Duration) or continuation, or the detection of set time point.In addition, the present invention is additionally arranged gas knot screen, sample gas can be removed In solid impurity, prevent it from producing influence to combustion testing, gas flowmeter can effectively control the input quantity of carrier gas, strict control Its ratio with sample gas amount is made, helps to increase the sensitivity of instrument.
Brief description of the drawings
Fig. 1 is external structure of the invention;
Circuit connection diagrams of the Fig. 2 for the present invention in the loaded state;
Circuit connection diagrams of the Fig. 3 for the present invention under detection state;
Fig. 4 is the schematic diagram of each interface on ten-way valve;
Fig. 5 is the schematic diagram of communication system;
Wherein, 100- housings, 200- air-channel systems, 201- Primordial Qi sampling gas circuit, 202- carrier gas conveying gas circuit, 203- drivings Strength road, 204- detection gas circuits, 205- gas knot screens, 206- triple valves, 207- gas flowmeters, 208- air pumps, 209- pressure sensors, 210- breather pipes, 211- switches, 300- clack boxes, 301- ten-way valves, the quantitative loops of 302- first, 303- the Two quantitative loops, 304- Primordial Qi sampling air-path interface, quantitative ring interface A, 306- carrier gas conveying the air-path interface A, 307- of 305- first First hydrogen flameionization monitor interface, quantitative ring interface A, the 310- carrier gas of 308- the first quantitative loop members of a family B, 309- second is defeated Send the hydrogen flameionization monitor interface of air-path interface B, 311- second, quantitative ring interface B, 313- the driving force gas circuits of 312- second Interface, 400- post cases, 401- methane packed columns, 402- total hydrocarbon packed columns, 500- the first hydrogen flameionization monitors, 600- Two hydrogen flameionization monitors, 700- communication systems, 701- signaling modules, 702- analysis modules, 703- control modules.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below Conjunction is specifically illustrating and embodiment, and the present invention is expanded on further.
As shown in figure 1, a kind of NMHC instrumentation, including housing 100, housing 100 is interior to be provided with air-channel system 200th, clack box 300, post case 400, the first hydrogen flameionization monitor 500, the second hydrogen flameionization monitor 600 and communication System 700.
With reference to shown in Fig. 2-5, air-channel system 200 includes Primordial Qi sampling gas circuit 201, carrier gas conveying gas circuit 202, driving strength Road 203 and detection gas circuit 204, and Primordial Qi sampling gas circuit 201, carrier gas conveying gas circuit 202, driving force gas circuit 203 and detection gas circuit 204 are all connected to clack box 300;Ten-way valve 301, the first quantitative loop 302 and the second quantitative loop 303, ten-way valve are provided with clack box 300 301 provided with Primordial Qi sampling air-path interface 304, the first quantitative ring interface A305, carrier gas conveying air-path interface A306, the first hydrogen flame Ionize the quantitative ring interface B308 of monitor interface 307, first, the second quantitative ring interface A309, carrier gas conveying air-path interface The quantitative ring interface B312 of B310, the second hydrogen flameionization monitor interface 311, second and driving force air-path interface 313;Post case A methane packed column 401 and a total hydrocarbon packed column 402, the hydrogen flameionization of methane packed column 401 and first are provided with 400 Monitor 500 is connected, and the hydrogen flameionization monitor 600 of total hydrocarbon packed column 402 and second is connected;Communication system 700 with it is described Air-channel system 200 and clack box 300 are connected, for controlling the work of air-channel system 200 and leading to for ten-way valve 301 in clack box 300.
Ten-way valve 301 has load condition position and detection mode bit:
With reference to shown in Fig. 2 and Fig. 4, when ten-way valve 301 is in load condition position, whole instrument is in load condition, whole Individual gas circuit annexation is:Primordial Qi is sampled, and first quantifies ring interface to gas circuit 201 --- Primordial Qi sampling air-path interface 304 --- --- --- second quantifies the first quantitative ring interface B308 --- the second quantitative ring interface A309 --- the first quantitative loop 302 A305 --- second quantitative ring interface B312 --- driving force air-path interface 313 --- the driving force gas circuit 203 of ring 303.Now, sample gas can Collection is prepared to the first quantitative loop 302 and the second quantitative loop 303 for detection.
With reference to shown in Fig. 3 and Fig. 4, when ten-way valve 301 is in detection mode bit, whole instrument can carry out sample gas detection, Now gas circuit is divided into three, is respectively:Carrier gas conveys gas circuit 202 --- carrier gas conveying air-path interface A306 --- first quantitative loop Interface A305 --- the first quantitative loop 302 --- the first quantitative ring interface B308 --- first hydrogen flameionization monitor interfaces 307 --- the first hydrogen flameionization monitor 500;Carrier gas conveys gas circuit 202 --- carrier gas conveying air-path interface B310 --- Second quantitative ring interface A309 --- the second quantitative loop 303 --- the second quantitative ring interface B312 --- second hydrogen flameionizations Monitor interface 311 --- the second hydrogen flameionization monitor 600;Primordial Qi is sampled, and gas circuit 201 --- Primordial Qi sampling gas circuit connects 304 --- driving force air-path interface 313 --- driving force gas circuits 203 of mouth.Now, the first hydrogen flameionization monitor 500 is examined Methane content is measured, the second hydrogen flameionization monitor 600 detects the content of total hydrocarbon, both differences extremely NMHC Content.
As preferred case, Primordial Qi sampling gas circuit 201 is provided with gas knot screen 205, for being removed to sample gas It is miscellaneous, including various particulate contaminants.
As preferred case, carrier gas conveying gas circuit 202 is provided with triple valve 206, and carrier gas is conveyed gas circuit by triple valve 206 202 points are to be connected with ten-way valve 301 after two, and are equipped with every a gas flowmeter 207.Gas flowmeter 207 The carrier gas instantaneous delivery and integrated flow in two gas circuits are measured respectively, and the convenient ratio to carrier gas and sampling gas is controlled, after allowing Continuous combustion measurement provides optimal ratio.
As preferred case, driving force gas circuit 203 is provided with air pump 208 and pressure sensor 209.Air pump 208 is used In the driving of sampling, the pressure value of the gas circuit of monitoring sampling in real time of pressure sensor 209, it is to avoid hypertonia and too low situation go out It is existing.
As preferred case, between air pump 208 and pressure sensor 209 be provided with breather pipe 210, breather pipe 210 with External world's connection, and provided with switch 211 on breather pipe 210.When switch 211 is opened, the direct air-breathing to external world of air pump 208 is stopped Only sample, inner air path can be cleared up to a certain extent, improve measurement accuracy rate.
As preferred case, communication system 700 includes signaling module 701, for receiving the command signal that computer is sent, And analysis module 702, analyzed and processed for the signal to receiving, and control module 703, for controlling ten-way valve 301 work led to each instrument on air-channel system 200.Using communication system 700, operational control is carried out by computer, Detection mode of operation to instrument is configured, for example with periodicity (different cycles duration) or continuation, or it is fixed when Between put detection.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (6)

1. a kind of NMHC instrumentation, including housing (100), it is characterised in that:Gas circuit is provided with the housing (100) System (200), clack box (300), post case (400), the first hydrogen flameionization monitor (500), the second hydrogen flameionization prison Device (600) and communication system (700) are surveyed,
The air-channel system (200) includes Primordial Qi sampling gas circuit (201), carrier gas conveying gas circuit (202), driving force gas circuit (203) With detection gas circuit (204), and Primordial Qi sampling gas circuit (201), carrier gas conveying gas circuit (202), driving force gas circuit (203) and detect gas Road (204) is all connected to clack box (300);
Ten-way valve (301), the first quantitative loop (302) and the second quantitative loop (303) are provided with the clack box (300), described ten lead to Valve (301) provided with Primordial Qi sampling air-path interface (304), the first quantitative ring interface A (305), carrier gas conveying air-path interface A (306), First hydrogen flameionization monitor interface (307), the first quantitative ring interface B (308), the second quantitative ring interface A (309), load Gas conveying air-path interface B (310), the second hydrogen flameionization monitor interface (311), the second quantitative ring interface B (312) and drive Power air-path interface (313);
A methane packed column (401) and a total hydrocarbon packed column (402), the methane filling are provided with the post case (400) Post (401) is connected with the first hydrogen flameionization monitor (500), total hydrocarbon packed column (402) and the second hydrogen flameionization prison Survey device (600) connection;
The communication system (700) is connected with the air-channel system (200) and clack box (300), for controlling air-channel system (200) Work and clack box (300) interior ten-way valve (301) lead to.
2. a kind of NMHC instrumentation according to claim 1, it is characterised in that:The Primordial Qi sampling gas circuit (201) it is provided with gas knot screen (205).
3. a kind of NMHC instrumentation according to claim 1, it is characterised in that:The carrier gas conveys gas circuit (202) triple valve (206) is provided with, carrier gas is conveyed gas circuit (202) and is divided into after two and ten-way valve (301) by triple valve (206) Connection, and it is equipped with every a gas flowmeter (207).
4. a kind of NMHC instrumentation according to claim 1, it is characterised in that:The driving force gas circuit (203) air pump (208) and pressure sensor (209) are provided with.
5. a kind of NMHC instrumentation according to claim 4, it is characterised in that:In the air pump (208) Breather pipe (210) is provided between pressure sensor (209), the breather pipe (210) is in communication with the outside, and in breather pipe (210) provided with switch (211).
6. a kind of NMHC instrumentation according to claim 1, it is characterised in that:The communication system (700) Including
Signaling module (701), for receiving the command signal that computer is sent, and
Analysis module (702), is analyzed and processed for the signal to receiving, and
Control module (703), the work led to each instrument on air-channel system (200) for controlling ten-way valve (301).
CN201710457014.XA 2017-06-16 2017-06-16 A kind of NMHC instrumentation Pending CN107290466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710457014.XA CN107290466A (en) 2017-06-16 2017-06-16 A kind of NMHC instrumentation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710457014.XA CN107290466A (en) 2017-06-16 2017-06-16 A kind of NMHC instrumentation

Publications (1)

Publication Number Publication Date
CN107290466A true CN107290466A (en) 2017-10-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109752344A (en) * 2017-11-08 2019-05-14 中国石油化工股份有限公司 A kind of portable non-methane total hydrocarbons concentration detector and detection method
CN110780015A (en) * 2018-07-31 2020-02-11 西安市宇驰检测技术有限公司 Detection device and detection method for non-methane total hydrocarbons
CN111505188A (en) * 2020-03-20 2020-08-07 合肥固泰自动化有限公司 Volatile organic compounds VOCs multichannel on-line monitoring system
CN112461951A (en) * 2020-11-04 2021-03-09 北京高麦克仪器科技有限公司 Chromatographic analyzer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205426869U (en) * 2016-03-24 2016-08-03 陈霄 Adopt portable designing's non -methane total hydrocarbon analysis module
CN205449910U (en) * 2015-12-30 2016-08-10 聚光科技(杭州)股份有限公司 Non -methane total hydrocarbon on -line measuring device

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CN205449910U (en) * 2015-12-30 2016-08-10 聚光科技(杭州)股份有限公司 Non -methane total hydrocarbon on -line measuring device
CN205426869U (en) * 2016-03-24 2016-08-03 陈霄 Adopt portable designing's non -methane total hydrocarbon analysis module

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109752344A (en) * 2017-11-08 2019-05-14 中国石油化工股份有限公司 A kind of portable non-methane total hydrocarbons concentration detector and detection method
CN110780015A (en) * 2018-07-31 2020-02-11 西安市宇驰检测技术有限公司 Detection device and detection method for non-methane total hydrocarbons
CN111505188A (en) * 2020-03-20 2020-08-07 合肥固泰自动化有限公司 Volatile organic compounds VOCs multichannel on-line monitoring system
CN112461951A (en) * 2020-11-04 2021-03-09 北京高麦克仪器科技有限公司 Chromatographic analyzer

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Application publication date: 20171024

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