CN106907571B - Airline pressure control system and total carbon-hydrogen analyzer - Google Patents
Airline pressure control system and total carbon-hydrogen analyzer Download PDFInfo
- Publication number
- CN106907571B CN106907571B CN201710093070.XA CN201710093070A CN106907571B CN 106907571 B CN106907571 B CN 106907571B CN 201710093070 A CN201710093070 A CN 201710093070A CN 106907571 B CN106907571 B CN 106907571B
- Authority
- CN
- China
- Prior art keywords
- gas
- damper
- pressure
- gas supply
- gas damper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of airline pressure control systems, including gas supply pipeline and the control piper controlled the gas flow of the gas supply pipeline；It is provided with first gas damper in the gas supply pipeline, is successively arranged the first pressure maintaining valve and second gas damper from upstream to downstream in the control piper；Pipeline connection between first pressure maintaining valve and second gas damper is located at the pipeline in first gas damper downstream in the gas supply pipeline, this system is without using back pressure regulator it is ensured that the discharge stability of gas supply pipeline, cost is relatively low for maintenance, while supplying the pressure of gas and flow and can be controlled and be read at low temperature.
Description
Technical field
The present invention relates to a kind of high temperature online gas flow control field of total carbon-hydrogen analyzer online, specifically a kind of gas circuits
Control pressurer system and total carbon-hydrogen analyzer.
Background technique
Total carbon-hydrogen analyzer is the instrument of total hydrocarbon content in online gas under measurement high temperature or normal temperature state to high temperature online,
The instrument is widely used in maximum acceptable concentration monitoring (TLV), quality monitoring, technique of environmental protection, workplace pollutant
The fields such as exhaust gas exhausting control, process optimization, automobile and engine combustion research, gas manufacturer.The technological difficulties of its product
First is that the control problem of high-temperature region high-pressure area airline pressure and flow, stablizing adjustable sample gas pressure supply just can guarantee
The stabilization signal of hydrogen flame detector generates, and is the basis of the high temperature accurate reliability service of total carbon-hydrogen analyzer online.For high temperature
The measurement of airline pressure, it is intended that learning the pressure in high temperature valve member adjustment process high temperature gas circuit by pressure sensor
Power changing value by the effect of gas damper, exports the sample gas of constant flow rate to examining so that a certain constant pressure is arrived in control
Survey device.Its difficult point is that high-temp pressure sensor is an electronic device, and the sensors with auxiliary electrode under 200 DEG C or so high temperature lacks it
It is again few, and figure is huge.The voltage-regulation voltage-stabilization valve member in high temperature and pressure region becomes the key of problem, obtains stable pressure simultaneously,
Need to cooperate Gas flow-limiting device to obtain stable flow, while the good vapour lock of consistency also becomes the pass of stabilizing gas flow velocity
Key.As high temp samples air pressure force controller valve member, generally adjusted in the market using counterbalance valve, counterbalance valve can guarantee its valve
Part forefront pressure is stablized adjustable, extra sample gas and is emptied by bypass, after having obtained stable pressure, is carried out with vapour lock
Stable flow can be obtained in current limliting.It is found after having consulted a large amount of related data, the schematic diagram of gas circuit of external such instrument
All more complicated, ABB MultiFID14 controls air ejector with pneumatic principle, then cooperates two negative pressure devices and one
Shuttle valve with central control unit realizes the flow control to sample gas circuit；600 type HFID of CAI is controlled using high-temperature pump and EPC
Sample preparation product gas circuit；The above two instrument gas circuit is complicated, and mostly electrical to participate in control, used is mostly customization valve member, this is undoubtedly increased
The failure rate and maintenance rate of instrument.Selection for current limiting device vapour lock, Siemens FIDAMAT6 are made with quartz capillary
For current limiting element；The homemade capillary nozzle of ABB MultiFID14, achievees the purpose that be precisely controlled flow；600 type of CAI
HFID uses metal capillary as current limiting element.
Therefore, in order to solve the above problem, need it is a kind of without using back pressure regulator it is ensured that gas supply pipeline
Discharge stability, cost is relatively low for maintenance, while supplying the pressure of gas and flow and can be controlled and be read at low temperature
Gas pressure control system and total carbon-hydrogen analyzer.
Summary of the invention
In view of this, providing one kind without using backpressure regulation the purpose of the present invention is overcoming defect in the prior art
Device it is ensured that gas supply pipeline discharge stability, cost is relatively low for maintenance, while supplying the pressure of gas and flow can
With the gas pressure control system for being controlled and being read at low temperature and total carbon-hydrogen analyzer.
Airline pressure control system of the invention, including gas supply pipeline and to the gas stream of the gas supply pipeline
Measure the control piper controlled；Be provided with first gas damper in the gas supply pipeline, in the control piper from
Upstream to downstream is successively arranged the first pressure maintaining valve and second gas damper；First pressure maintaining valve and second gas damper it
Between pipeline connection in the gas supply pipeline be located at first gas damper downstream pipeline；
Airline pressure control system of the invention further includes first for detecting the first pressure maintaining valve outlet pressures
Pressure sensor；
Further, third gas damper is additionally provided in the gas supply pipeline；The third gas damper in
In gas supply pipeline with the downstream of control piper link position；
Further, the first gas damper, second gas damper and/or third gas damper are elastic quartz
Capillary；
The invention also discloses a kind of total carbon-hydrogen analyzers, including detector, for the sample air inlet to the detector
End conveys the sample gas supply line of sample gas and the control piper for controlling sample gas supply flow；The sample
Gas damper I is provided in gas supply pipeline, it is gentle that pressure maintaining valve I is successively arranged from upstream to downstream in the control piper
Body damper II；Pipeline connection between the pressure maintaining valve I and gas damper II is located at gas in the gas supply pipeline
The pipeline in I downstream of body damper；
Total carbon-hydrogen analyzer of the invention further includes the pressure sensor I for detecting I outlet pressures of pressure maintaining valve；
Further, gas damper III is additionally provided in the gas supply pipeline；The gas damper III is located at sample
In product gas supply pipeline with the downstream of control piper link position；
Total carbon-hydrogen analyzer of the invention further includes for the combustion-supporting gas supply to detector conveying combustion-supporting gas
Pipeline；Pressure maintaining valve II, pressure sensor II and gas are disposed with from upstream to downstream in the combustion-supporting gas supply line
Damper IV；The inlet end of the control piper is connected to the pipe for being located at the upstream voltage-stablizer II in the combustion-supporting gas supply line
Road；
Further, the gas damper I, gas damper II, gas damper III and/or gas damper IV are
Elastic quartz capillary tube；
It further, further include high-temperature incubator and cryostat；The gas damper I, gas damper II, gas
Damper III and gas damper IV is located in the high-temperature incubator；The pressure maintaining valve I, pressure maintaining valve II, pressure sensor I,
Pressure sensor II is respectively positioned in the cryostat.
The beneficial effects of the present invention are: airline pressure control system of the invention, is managed in gas supply pipeline with control
Sample gas and control gas are each led into road, after sample gas enters gas supply pipeline, after first gas damper,
Sample pressure fluctuation is reduced by first gas damper, a part of sample gas passes through gas supply pipeline and control piper
Between connecting line enter in control piper and flowed out from second gas damper, another part is damped to third gas
Device flowing since the pressure of gas supply pipeline and the interconnected position of control piper is equal, and supplies in control piper with gas
Answering the pressure of pipeline connection position can be controlled by the first pressure maintaining valve, right simultaneously by the first pressure maintaining valve and first gas damper
The pressure of gas supply pipeline eluting gas is controlled, and therefore, the pressure of gas supply pipeline eluting gas is relatively stable, separately
Outside, since the first pressure maintaining valve is located in control piper, the first pressure maintaining valve can be located in low temperature environment and to positioned at high temperature
The flow and pressure of the gas supply pipeline of environment are controlled, and guarantee pressure controling precision, and improve pressure maintaining valve uses the longevity
Life.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the structural schematic diagram of airline pressure control system of the invention；
Fig. 2 is the structural schematic diagram of total carbon-hydrogen analyzer of the invention.
Specific embodiment
Fig. 1 is the structural diagram of the present invention, the airline pressure control system in the present embodiment, including gas supply pipeline
21 and control piper 25 that the gas flow of the gas supply pipeline 21 is controlled；It is set in the gas supply pipeline 21
It is equipped with first gas damper 22, is successively arranged the first pressure maintaining valve 28 and the second gas in the control piper 25 from upstream to downstream
Body damper 26；Pipeline connection between first pressure maintaining valve 28 and second gas damper 26 is in the gas supply pipeline
It is located at the pipeline in 22 downstream of first gas damper in 21；As shown in Figure 1, the first voltage-stablizer is common pressure maintaining valve, downstream may be used
The first pressure sensor 27 of room temperature is set, for measuring the pressure of 28 rear end of the first pressure maintaining valve, sample gas enters from switch valve,
After first gas damper 22, since the internal diameter of gas damper is smaller, pipeline is longer, and biggish resistance reduces sample
The fluctuation of atmospheric pressure, a part of sample gas are flowed to from by 24 road of connecting tube between gas supply pipeline 21 and control piper 25
Control piper 25 is simultaneously flowed out from second gas damper 26, and another part flows into detector, a section from third gas damper 23
It is flowed through at point there are two types of gas, i.e., a part of sample gas and the control gas flowed through from the first pressure maintaining valve 28, due to being at a and b
Etc. pressure, so the pressure of b node can be controlled by the first pressure maintaining valve 28, and in the rear end of first gas damper 22 to a
Region at node, under the action of the first pressure maintaining valve 28, pressure is also stable, first gas damper 22 and the first pressure stabilizing
After valve 28 guarantees that the air pressure at b with temperature, the pressure of sample gas are stablized simultaneously, damped using a biggish third gas
The stable sample gas flow into detector can be obtained in device 23.
Airline pressure control system of the invention further includes for detecting 28 outlet pressures of the first pressure maintaining valve
One pressure sensor 27, the pressure of 28 outlet end of the first pressure maintaining valve can be read by first pressure sensor 27, to obtain a
The pressure of node and b node location, so that adjusting the first pressure maintaining valve 28 in real time guarantees that end pressure is stablized thereafter.
In the present embodiment, third gas damper 23 is additionally provided in the gas supply pipeline 21；The third gas resistance
Buddhist nun's device 23 is located at the downstream in gas supply pipeline 21 with 25 link position of control piper, in first gas damper 22 and first
Under the collective effect of pressure maintaining valve 28, for the pressure of 23 input end of third gas damper to tend towards stability, sample gas passes through again
After three dampers, pressure oscillation will further be weakened.
In the present embodiment, the first gas damper 22, second gas damper 26 and/or third gas damper 23
For elastic quartz capillary tube；Elastic quartz capillary tube is as Gas flow-limiting element, and manufacturing technology is mature, consistency is good, at low cost
It is honest and clean, in addition, each gas damper need to reach certain proportion relation, it just can guarantee the correct of detector input flow rate.Thus
Capillary bore and length are determined by the mode that theoretical calculation and experiment combine, due to the vapour lock capillary category used herein
In elongated hole, the ratio between the long L in hole and diameter D are greater than 4, calculate the formula of flow are as follows: Q=π λ D4(P1-P2)/4；
Wherein: Q is the mass flow of gas；λ is the friction drag coefficient of capillary；D is capillary diameter；P1 is capillary
Pipe upstream pressure；P2 is capillary downstream pressure.Calculating for friction drag coefficient in capillary, is closed using Churchill
Join formula:
λ=8 [(8/Re)12+1/(A+B)3/2]1/12
A={ 2.457ln (1/ [(7/Re)0.7+0.27(ε/D)])}16
B=(37530/Re)16
Re=mD/ μ
Wherein: Re is Reynolds number；ε is roughness；μ is dynamic viscosity；M is mass velocity
Re=mD/ μ
Wherein: Re is Reynolds number；ε is roughness；μ is dynamic viscosity；M is mass velocity.
Fig. 2 be of the invention as shown in Fig. 2, the present embodiment total carbon-hydrogen analyzer, including detector 18, for described
The sample inlet end of detector 18 conveys the sample gas supply line 2 of sample gas and for controlling sample gas supply flow
Control piper 15；Gas damper I 3 is provided in the sample gas supply line 2, from upstream in the control piper 15
Pressure maintaining valve I 14 and gas damper II are successively arranged to downstream；Pipeline between the pressure maintaining valve I 14 and gas damper II10
The pipeline for being located at I 3 downstream of gas damper in the gas supply pipeline is connected to by connecting tube 9, of the invention is total hydrocarbon
Analyzer further includes the pressure sensor I 12 for detecting I 14 outlet pressures of pressure maintaining valve, in the gas supply pipeline
It is additionally provided with gas damper III4；The gas damper III4 is located in sample gas supply line 2 to be connected with control piper 15
Connect the downstream of position；Voltage-stablizer I is common pressure maintaining valve in figure, the pressure sensor I 12 of room temperature is provided with downstream, for surveying
The pressure of I 14 rear end of pressure maintaining valve is measured, sample gas enters from switch valve 1, after gas damper I 3, due in gas damper
Diameter is smaller, and pipeline is longer, and biggish resistance reduces the fluctuation of collected sample gas pressure, and a part of sample gas is hindered from gas
Buddhist nun's device II10 outflow, another part flow into detector 18 from gas damper III4, flow through at a node there are two types of gas, i.e.,
A part of sample gas and the air flowed through from pressure maintaining valve I 14, due at a and b for etc. pressure, so the pressure of b node can be by
Pressure maintaining valve I 14 controls, and the region in the rear end of gas damper I 3 at a node, under the action of voltage-stablizer I, pressure
And it is stable, both sides reason causes the pressure at b very stable, larger using one after the pressure of sample gas is stablized
Gas damper III4, that is, can guarantee into detector 18 sample gas stability.
Total carbon-hydrogen analyzer of the present embodiment further includes for the combustion-supporting gas to the detector 18 conveying combustion-supporting gas
Supply line 17；Pressure maintaining valve II16, pressure sensing are disposed with from upstream to downstream in the combustion-supporting gas supply line 17
Device II13 and gas damper IV11；The inlet end of the control piper 15 is connected to position in the combustion-supporting gas supply line 17
Pipeline in the upstream voltage-stablizer II, combustion-supporting gas a part pass sequentially through pressure maintaining valve II16, pressure sensor II13 and gas resistance
Buddhist nun device IV11, enters the combustion-supporting gas inlet end of detector 18, and another part combustion-supporting gas flows into control as control gas
Pipeline 15, total carbon-hydrogen analyzer of the present embodiment further include the combustible gas for supplying fuel gas (such as hydrogen) to detector 18
Body supply line 6, fuel gas supply line 6 are disposed with solenoid valve, pressure maintaining valve III8, pressure sensing from upstream toward downstream
Device III7, gas damper V5.
In the present embodiment, the gas damper I 3, gas damper II10, gas damper III4 and/or gas resistance
Buddhist nun's device IV11 is elastic quartz capillary tube；Gas damper I 3, gas damper II10, gas damper III4, air damping
The specification (aperture * length) of device IV11 and gas damper V5 is respectively 0.1 × 15mm of φ；φ0.2×10mm；φ0.075×
15mm；φ0.1×20mm；φ0.1×30mm.Vapour lock proportion by this parameter, the gas burning into detector 18 is abundant,
Signal-to-Noise is higher, and the drift index of full scale and zero gas is small, and obtained detection limit is lower.
Total carbon-hydrogen analyzer in the present embodiment further includes high-temperature incubator 19 and cryostat 20；The air damping
Device I, gas damper II, gas damper III4 and gas damper IV11 are located in the high-temperature incubator 19；It is described steady
Pressure valve I, pressure maintaining valve II16, pressure sensor I 12, pressure sensor II13 are respectively positioned in the cryostat 20, this total carbon
Hydrogen analyzer can carry out pressure to the sample gas at high temperature in room temperature region and flow is adjusted, safe and reliable, easy to operate.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of utility model.
Claims (6)
1. a kind of airline pressure control system, it is characterised in that: including gas supply pipeline and to the gas supply pipeline
The control piper that gas flow is controlled；First gas damper, the control pipe are provided in the gas supply pipeline
The upstream Lu Zhongcong to downstream is successively arranged the first pressure maintaining valve and second gas damper；First pressure maintaining valve and second gas hinder
Pipeline connection between Buddhist nun's device is located at the pipeline in first gas damper downstream in the gas supply pipeline；It further include being used for
Detect the first pressure sensor of the first pressure maintaining valve outlet pressures；Third gas is additionally provided in the gas supply pipeline
Damper；Downstream of the third gas damper in gas supply pipeline with control piper link position.
2. airline pressure control system according to claim 1, it is characterised in that: the first gas damper, second
Gas damper and/or third gas damper are elastic quartz capillary tube.
3. a kind of total carbon-hydrogen analyzer, it is characterised in that: including detector, for being conveyed to the sample inlet end of the detector
The sample gas supply line of sample gas and control piper for controlling sample gas supply flow；The sample gas supplies
It answers and is provided with gas damper I in pipeline, be successively arranged pressure maintaining valve I and air damping from upstream to downstream in the control piper
Device II；Pipeline connection between the pressure maintaining valve I and gas damper II is located at air damping in the gas supply pipeline
The pipeline in I downstream of device；It further include the pressure sensor I for detecting I outlet pressures of pressure maintaining valve；The feed tube
Gas damper III is additionally provided in road；The gas damper III is located in sample gas supply line to be connect with control piper
The downstream of position.
4. total carbon-hydrogen analyzer according to claim 3, it is characterised in that: further include for being helped to detector conveying
The combustion-supporting gas supply line of combustion gas body；Pressure maintaining valve is disposed with from upstream to downstream in the combustion-supporting gas supply line
II, pressure sensor II and gas damper IV；The inlet end of the control piper is connected to the combustion-supporting gas supply line
In be located at the upstream voltage-stablizer II pipeline.
5. total carbon-hydrogen analyzer according to claim 4, it is characterised in that: the gas damper I, gas damper
II, gas damper III and/or gas damper IV are elastic quartz capillary tube.
6. total carbon-hydrogen analyzer according to claim 5, it is characterised in that: further include high-temperature incubator and cryogenic thermostat
Case；The gas damper I, gas damper II, gas damper III and gas damper IV are located at the high-temperature incubator
It is interior；The pressure maintaining valve I, pressure maintaining valve II, pressure sensor I, pressure sensor II are respectively positioned in the cryostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093070.XA CN106907571B (en) | 2017-02-21 | 2017-02-21 | Airline pressure control system and total carbon-hydrogen analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093070.XA CN106907571B (en) | 2017-02-21 | 2017-02-21 | Airline pressure control system and total carbon-hydrogen analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907571A CN106907571A (en) | 2017-06-30 |
| CN106907571B true CN106907571B (en) | 2019-04-02 |
Family
ID=59208296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710093070.XA Active CN106907571B (en) | 2017-02-21 | 2017-02-21 | Airline pressure control system and total carbon-hydrogen analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106907571B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680528B (en) * | 2018-05-18 | 2020-10-02 | 湖南镭目科技有限公司 | Gas diffusion analysis device |
| CN110873286B (en) * | 2019-11-21 | 2020-08-25 | 西安交通大学 | Multiple air source supply device for high-pressure large-flow gas experiment |
| CN111272922A (en) * | 2020-03-20 | 2020-06-12 | 浙江全世科技有限公司 | Improved device and method for monitoring total hydrocarbons in real time by hydrogen flame ionization detector |
| TWI789578B (en) * | 2020-04-10 | 2023-01-11 | 睿普工程股份有限公司 | Exhaust emission recovery and voltage stabilization control system |
| CN115419830A (en) * | 2022-08-30 | 2022-12-02 | 北京普析通用仪器有限责任公司 | Gas multi-channel device and gas chromatograph |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221517A (en) * | 1991-12-17 | 1993-06-22 | Horiba, Ltd. | Methane analyzer with improved sample preparation |
| CN2268257Y (en) * | 1996-05-23 | 1997-11-19 | 徐春明 | Quick-acting analysis instrument for smoke |
| US5852227A (en) * | 1996-05-25 | 1998-12-22 | Pierburg Ag | Apparatus for measuring the composition of exhaust gases of internal combustion engines |
| CN2758771Y (en) * | 2004-12-27 | 2006-02-15 | 上海神开科技工程有限公司 | Fully automatic fast gas chromatograph |
| CN101162200A (en) * | 2007-05-10 | 2008-04-16 | 沈阳东宇集团股份有限公司 | System using chemiluminescence method to execute nitrous oxides analysis |
| CN201637732U (en) * | 2009-09-22 | 2010-11-17 | 上海科创色谱仪器有限公司 | Gas chromatograph for determining benzene and non-methane hydrocarbons in food-grade carbon dioxide |
| CN102445367A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Pretreatment system used for gas on-line analysis |
| CN102621272A (en) * | 2011-12-08 | 2012-08-01 | 河北先河环保科技股份有限公司 | On-line analyzer for hydrocarbons in air |
| CN104297390A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis method |
| CN205175991U (en) * | 2015-11-28 | 2016-04-20 | 首钢水城钢铁（集团）有限责任公司 | Empty hydrocarbon analytic system always that divides |
-
2017
- 2017-02-21 CN CN201710093070.XA patent/CN106907571B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221517A (en) * | 1991-12-17 | 1993-06-22 | Horiba, Ltd. | Methane analyzer with improved sample preparation |
| CN2268257Y (en) * | 1996-05-23 | 1997-11-19 | 徐春明 | Quick-acting analysis instrument for smoke |
| US5852227A (en) * | 1996-05-25 | 1998-12-22 | Pierburg Ag | Apparatus for measuring the composition of exhaust gases of internal combustion engines |
| CN2758771Y (en) * | 2004-12-27 | 2006-02-15 | 上海神开科技工程有限公司 | Fully automatic fast gas chromatograph |
| CN101162200A (en) * | 2007-05-10 | 2008-04-16 | 沈阳东宇集团股份有限公司 | System using chemiluminescence method to execute nitrous oxides analysis |
| CN201637732U (en) * | 2009-09-22 | 2010-11-17 | 上海科创色谱仪器有限公司 | Gas chromatograph for determining benzene and non-methane hydrocarbons in food-grade carbon dioxide |
| CN102445367A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Pretreatment system used for gas on-line analysis |
| CN102621272A (en) * | 2011-12-08 | 2012-08-01 | 河北先河环保科技股份有限公司 | On-line analyzer for hydrocarbons in air |
| CN104297390A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis method |
| CN205175991U (en) * | 2015-11-28 | 2016-04-20 | 首钢水城钢铁（集团）有限责任公司 | Empty hydrocarbon analytic system always that divides |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106907571A (en) | 2017-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106907571B (en) | Airline pressure control system and total carbon-hydrogen analyzer | |
| CN101256417B (en) | Proportional valve pair accurate atmosphere controller | |
| CN105021262B (en) | The adjustable gas flow scaling method of temperature, pressure | |
| CN102322907A (en) | Integrated intelligent gas flow meter with double flow measuring heads | |
| CN203191038U (en) | Movable type gas flow measurement standard device and gas flow measurement closed-loop type system | |
| CN107677317A (en) | Flue dust gas sampling comprehensive detection system | |
| US20080190168A1 (en) | Fast Response Proportional Sampling System and Method for Exhaust Gas Analysis | |
| CN108106679A (en) | A kind of measuring method and system of power station coal pulverizer inlet air quantity | |
| CN201476822U (en) | Dual-channel pore plate gas flow measuring device with multiple built-in parameters | |
| CN108121370A (en) | A kind of investigating method and TT＆C system of vacuum environment gas flow | |
| CN111103020A (en) | Flow detection device, flow control system and flow detection method | |
| CN202748068U (en) | Gas flowmeter | |
| CN202836639U (en) | Heat-type v-cone differential pressure flow duplex measurement device | |
| CN209639805U (en) | A kind of aerospace automatic calibration unit for gas flowmeters | |
| CN206470284U (en) | The measurement apparatus of gas in pipelines flow velocity | |
| CN113776628B (en) | Laminar flow flowmeter testing arrangement of high low pressure and temperature adjustable | |
| CN109443787A (en) | A kind of big flow, high-precision air bleed valve test device | |
| CN106287806B (en) | A kind of automatic flow control system and its working method of high temperature combustion furnace | |
| CN206160190U (en) | High temperature fires burning furnace's flow automatic control system | |
| CN100526873C (en) | Constant sulphur appliance with airflow balancing device | |
| CN209102384U (en) | A kind of big flow, high-precision air bleed valve test device | |
| CN202836646U (en) | Thermal vortex composite flow measuring device with bypass bridge circuit | |
| Jasinski et al. | Gas sampling system for matrix of semiconductor gas sensors | |
| CN207248305U (en) | A kind of flowmeter comparison device | |
| CN208596125U (en) | A kind of liquid natural gas gasification rate measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |