CN106907571A - Airline pressure control system and total carbon-hydrogen analyzer - Google Patents
Airline pressure control system and total carbon-hydrogen analyzer Download PDFInfo
- Publication number
- CN106907571A CN106907571A CN201710093070.XA CN201710093070A CN106907571A CN 106907571 A CN106907571 A CN 106907571A CN 201710093070 A CN201710093070 A CN 201710093070A CN 106907571 A CN106907571 A CN 106907571A
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- China
- Prior art keywords
- gas
- pressure
- damper
- gas supply
- gas damper
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Classifications
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- 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
Abstract
The invention discloses a kind of airline pressure control system, including the control piper that gas supply pipeline and the gas flow to the gas supply pipeline are controlled；First gas damper is provided with the gas supply pipeline, the first pressure maintaining valve and second gas damper are sequentially provided with from upstream to downstream in the control piper；Pipeline connection between first pressure maintaining valve and second gas damper is in the gas supply pipeline positioned at the pipeline in first gas damper downstream, the system is without using back pressure regulator it is ensured that the discharge stability of gas supply pipeline, maintaining cost is relatively low, while the pressure and flow of supplying gas can be controlled and read at low temperature.
Description
Technical field
The present invention relates to a kind of high temperature online gas flow control field of online total carbon-hydrogen analyzer, specifically a kind of gas circuit
Control pressurer system and total carbon-hydrogen analyzer.
Background technology
The online total carbon-hydrogen analyzer of high temperature is measured under high temperature or normal temperature state, the instrument of total hydrocarbon content in online gas,
The instrument is widely used in environmental protection, maximum acceptable concentration monitoring (TLV) of workplace pollutant, quality monitoring, technique
The field such as waste gas discharge monitoring, process optimization, automobile and engine combustion research, gas manufacturer.The technological difficulties of its product
One of be high-temperature region high-pressure area airline pressure and flow control problem, stablize adjustable sample gas pressure feed and just can guarantee that
The stabilization signal of hydrogen flame detector is produced, and is the basis of the high temperature accurate reliability service of online total carbon-hydrogen analyzer.For high temperature
The measurement of airline pressure, it is intended that by pressure sensor, learning the pressure of the high temperature gas circuit during the regulation of high temperature valve member
Power changing value, so as to control a certain constant pressure, by the effect of gas damper, exports the sample gas of constant flow rate to examining
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 build is huge.The voltage-regulation voltage-stabilization valve member in HTHP region turn into problem key, the pressure stablized simultaneously,
The flow for coordinating Gas flow-limiting device to be stablized is needed, while the good vapour lock of uniformity also turns into the pass of stabilizing gas flow velocity
Key.Used as high temp samples air pressure force controller valve member, in the market commonly uses counterbalance valve to adjust, and counterbalance valve can ensure its valve
Part forefront pressure stablizes adjustable, and unnecessary sample gas are emptied by bypass, after the pressure stablized, is carried out with vapour lock
Current limliting, you can the flow stablized.Found after substantial amounts of related data has been consulted, the schematic diagram of gas circuit of external such instrument
All more complicated, ABB MultiFID14 control air ejector with pneumatic principle, then coordinate two negative pressure devices and one
Shuttle valve with central control unit, realizes the flow control to sample gas circuit；The type HFID of CAI 600 are controlled using high-temperature pump and EPC
Sample preparation product gas circuit；The instrument gas circuit of the above two is complicated, mostly electrically participates in control, and used is generally customization valve member, and this is undoubtedly increased
The fault rate and maintenance rate of instrument.For the selection of current limiting device vapour lock, Siemens FIDAMAT6 are made with quartz capillary
It is current limiting element；The homemade capillary nozzles of ABB MultiFID14, reach the purpose for being precisely controlled flow；The types of CAI 600
HFID metal capillaries are used as current limiting element.
Therefore, for solve problem above, it is necessary to it is a kind of without using back pressure regulator it is ensured that gas supply pipeline
Discharge stability, maintaining cost is relatively low, while the pressure and flow of supplying gas can be controlled and read at low temperature
Gas pressure control system and total carbon-hydrogen analyzer.
The content of the invention
In view of this, the purpose of the present invention is to overcome defect of the prior art, there is provided one kind is without using backpressure regulation
Device is it is ensured that the discharge stability of gas supply pipeline, and maintaining cost is relatively low, while the pressure and flow of supplying gas can
With the gas pressure control system for being controlled and reading at low temperature and total carbon-hydrogen analyzer.
Airline pressure control system of the invention, including gas supply pipeline and the gas stream to the gas supply pipeline
The control piper that amount is controlled；First gas damper is provided with the gas supply pipeline, in the control piper from
Upstream to downstream is sequentially provided with 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 positioned at first gas damper downstream pipeline；
Airline pressure control system of the invention is also included for detecting the first of the first pressure maintaining valve outlet pressures
Pressure sensor；
Further, it is additionally provided with third gas damper in the gas supply pipeline；The third gas damper in
With the downstream of control piper link position in gas supply pipeline；
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 analyzer, including detector, for the sample air inlet to the detector
The sample gas supply line and the control piper for controlling sample gas supply flow of end conveying sample gas；The sample
Gas damper I is provided with gas supply pipeline, it is gentle from upstream to downstream to be sequentially provided with pressure maintaining valve I 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 the downstream of body damper I；
Total carbon-hydrogen analyzer of the invention also includes the pressure sensor I for detecting the outlet pressures of the pressure maintaining valve I；
Further, it is additionally provided with gas damper III in the gas supply pipeline；The gas damper III is located at sample
With the downstream of control piper link position in product gas supply pipeline；
Total carbon-hydrogen analyzer of the invention also includes being supplied for the combustion-supporting gas to detector conveying combustion-supporting gas
Pipeline；In the combustion-supporting gas supply line pressure maintaining valve II, pressure sensor II and gas are disposed with from upstream to downstream
Damper IV；The inlet end of the control piper is communicated in the combustion-supporting gas supply line pipe for being located at voltage-stablizer II upstreams
Road；
Further, the gas damper I, gas damper II, gas damper III and/or gas damper IV are
Elastic quartz capillary tube；
Further, also including 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 invention are as follows：Airline pressure control system of the invention, in gas supply pipeline and control pipe
Sample gas and control gas are each led into road, after sample gas enter gas supply pipeline, by after first gas damper,
Sample pressure fluctuation is reduced by first gas damper, a part of sample gas pass through gas supply pipeline and control piper
Between connecting line enter into control piper and from the outflow of second gas damper, another part is damped to third gas
Device flows, and because the pressure of gas supply pipeline and the interconnected position of control piper is equal, and is supplied with gas in control piper
Answering the pressure of pipeline connection position can be controlled by the first pressure maintaining valve, simultaneously right by the first pressure maintaining valve and first gas damper
The pressure of gas supply pipeline eluting gas is controlled, therefore, the pressure more temperature of gas supply pipeline eluting gas, separately
Outward, because the first pressure maintaining valve is located in control piper, therefore the first pressure maintaining valve may be located in low temperature environment and be pointed to high temperature
The flow and pressure of the gas supply pipeline of environment are controlled, it is ensured that pressure controling precision, improve the use longevity of pressure maintaining valve
Life.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural representation of airline pressure control system of the invention；
Fig. 2 is the structural representation of total carbon-hydrogen analyzer of the invention.
Specific embodiment
Fig. 1 is structural representation of the invention, the airline pressure control system in the present embodiment, including gas supply pipeline
21 and the control piper 25 that is controlled of the gas flow to the gas supply pipeline 21；Set in the gas supply pipeline 21
First gas damper 22 is equipped with, the first pressure maintaining valve 28 and the second gas are sequentially provided with from upstream to downstream in the control piper 25
Body damper 26；Pipeline connection between first pressure maintaining valve 28 and second gas damper 26 is in the gas supply pipeline
Positioned at the pipeline in the downstream of first gas damper 22 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 normal temperature is set, and the pressure for measuring the rear end of the first pressure maintaining valve 28, sample gas enter from switch valve,
After by first gas damper 22, because the internal diameter of gas damper is smaller, pipeline is more long, and larger resistance reduces sample
The fluctuation of atmospheric pressure, a part of sample gas are flowed to from by the road of connecting tube 24 between gas supply pipeline 21 and control piper 25
Control piper 25 simultaneously flows out from second gas damper 26, and another part flows into detector, a sections from third gas damper 23
There are two kinds of gases to flow through at point, 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
Deng pressure, so the pressure of b nodes 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, in the presence of the first pressure maintaining valve 28, pressure is also stabilization, the voltage stabilizing of first gas damper 22 and first
Valve 28 ensures there is the air pressure of temperature at b simultaneously, after the pressure stability of sample gas, then is damped by a larger third gas
Device 23, you can the sample gas flow of the entrance detector stablized.
Airline pressure control system of the invention also include for detect the outlet pressures of the first pressure maintaining valve 28 the
One pressure sensor 27, the pressure of the port of export of the first pressure maintaining valve 28 can be read by first pressure sensor 27, so as to obtain a
The pressure of node and b node locations, so that the first pressure maintaining valve of real-time adjustment 28 ensures its rear end pressure stability.
In the present embodiment, third gas damper 23 is additionally provided with the gas supply pipeline 21；The third gas resistance
Downstream of the Buddhist nun's device 23 in gas supply pipeline 21 with the link position of control piper 25, in first gas damper 22 and first
Under the collective effect of pressure maintaining valve 28, to tend towards stability, sample gas is again by for the pressure of the entrance point of third gas damper 23
After three dampers, its 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
It is elastic quartz capillary tube；, used as Gas flow-limiting element, manufacturing technology is ripe, uniformity is good, low cost for elastic quartz capillary tube
It is honest and clean, in addition, each gas damper need to reach certain proportion relation, just can guarantee that the correct of detector input flow rate.For this
The mode being combined by theoretical calculation and experiment determines capillary bore and length, due to the vapour lock capillary category used herein
In elongated hole, the ratio between its hole L long and diameter D is more than 4, and the formula of calculated flow rate is：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.For the calculating of friction drag coefficient in capillary, closed using Churchill
Connection formula:
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 is of the invention as shown in Fig. 2 total carbon-hydrogen analyzer of the present embodiment, 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 with the sample gas supply line 2, from upstream in the control piper 15
Pressure maintaining valve I 14 and gas damper II are sequentially provided with to downstream；Pipeline between the pressure maintaining valve I 14 and gas damper II10
The pipeline that is located at gas damper I 3 downstream is communicated in the gas supply pipeline by connecting tube 9, it is of the invention total hydrocarbon
Analyzer also includes the pressure sensor I 12 for detecting the outlet pressures of the pressure maintaining valve I 14, in the gas supply pipeline
It is additionally provided with gas damper III4；The gas damper III4 connects in being located at sample gas supply line 2 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 normal temperature is provided with downstream, for surveying
The pressure of amount pressure maintaining valve I 14 rear end, sample gas enter from switch valve 1, by gas damper I 3 after, due in gas damper
Footpath is smaller, and pipeline is more long, and larger resistance reduces the fluctuation of the sample gas pressure for collecting, and a part of sample gas hinder from gas
Buddhist nun's device II10 flows out, and another part flows into detector 18 from gas damper III4, has two kinds of gases to flow through at a nodes, 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 nodes can be by
Pressure maintaining valve I 14 is controlled, and the region at the rear end of gas damper I 3 to a nodes, in the presence of voltage-stablizer I, pressure
It is also stabilization, both sides reason causes the pressure at b very stable, after the pressure stability of sample gas then larger by one
Gas damper III4, you can ensure enter detector 18 sample gas stability.
Total carbon-hydrogen analyzer of the present embodiment also includes the combustion-supporting gas for conveying combustion-supporting gas to the detector 18
Supply line 17；In the combustion-supporting gas supply line 17 pressure maintaining valve II16, pressure sensing are disposed with from upstream to downstream
Device II13 and gas damper IV11；The inlet end of the control piper 15 is communicated in the middle position of combustion-supporting gas supply line 17
In the pipeline of voltage-stablizer II upstreams, a combustion-supporting gas part passes sequentially through pressure maintaining valve II16, pressure sensor II13 and gas resistance
Buddhist nun device IV11, enters into 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 is also included for the combustible gas to supply fuel gas of detector 18 (such as hydrogen)
Body supply line 6, fuel gas supply line 6 is disposed with magnetic valve, pressure maintaining valve III8, pressure sensing from upstream toward downstream
Device III7, gas damper V5.
In the present embodiment, the resistance of the gas damper I 3, gas damper II10, gas damper III4 and/or gas
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；0.2×10mm；0.075×15mm；
0.1×20mm；0.1×30mm.Matched by the vapour lock of this parameter, the gas burning into detector 18 is abundant, signal noise
Compare high, the drift index of full scale and zero gas is small, and the test limit for obtaining is relatively low.
Total carbon-hydrogen analyzer in the present embodiment also 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 and Flow-rate adjustment to the sample gas at high temperature in normal temperature region, safe and reliable, simple to operate.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (10)
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 with the gas supply pipeline
In road the first pressure maintaining valve and second gas damper are sequentially provided with from upstream to downstream；First pressure maintaining valve hinders with second gas
Pipeline connection between Buddhist nun's device is in the gas supply pipeline positioned at the pipeline in first gas damper downstream.
2. airline pressure control system according to claim 1, it is characterised in that：Also include for detecting that described first is steady
The first pressure sensor of pressure valve outlet pressures.
3. airline pressure control system according to claim 2, it is characterised in that：It is additionally provided with the gas supply pipeline
Third gas damper；The third gas damper in gas supply pipeline with the downstream of control piper link position.
4. airline pressure control system according to claim 3, it is characterised in that：The first gas damper, second
Gas damper and/or third gas damper are elastic quartz capillary tube.
5. 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 the control piper for controlling sample gas supply flow；The sample gas is supplied
Answer and be provided with gas damper I in pipeline, pressure maintaining valve I and air damping are sequentially provided with 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 the downstream of device I.
6. total carbon-hydrogen analyzer according to claim 5, it is characterised in that：Also include for detecting that the pressure maintaining valve I goes out
The pressure sensor I of mouth end pressure.
7. total carbon-hydrogen analyzer according to claim 6, it is characterised in that：Gas is additionally provided with the gas supply pipeline
Damper III；Downstreams of the gas damper III in sample gas supply line with control piper link position.
8. total carbon-hydrogen analyzer according to claim 7, it is characterised in that：Also include being used for being helped to detector conveying
The combustion-supporting gas supply line of combustion gas body；In the combustion-supporting gas supply line pressure maintaining valve is disposed with from upstream to downstream
II, pressure sensor II and gas damper IV；The inlet end of the control piper is communicated in the combustion-supporting gas supply line
In be located at voltage-stablizer II upstreams pipeline.
9. total carbon-hydrogen analyzer according to claim 8, 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.
10. total carbon-hydrogen analyzer according to claim 9, it is characterised in that：Also 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 |
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| Publication Number | Publication Date |
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| CN106907571A true CN106907571A (en) | 2017-06-30 |
| CN106907571B CN106907571B (en) | 2019-04-02 |
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ID=59208296
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| CN201710093070.XA Active CN106907571B (en) | 2017-02-21 | 2017-02-21 | Airline pressure control system and total carbon-hydrogen analyzer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680528A (en) * | 2018-05-18 | 2018-10-19 | 湖南镭目科技有限公司 | A kind of gas diffusion analytical equipment |
| CN110873286A (en) * | 2019-11-21 | 2020-03-10 | 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 |
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106907571B (en) | 2019-04-02 |
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