CN204203163U - A kind of system of monitoring hydrate and generating - Google Patents
A kind of system of monitoring hydrate and generating Download PDFInfo
- Publication number
- CN204203163U CN204203163U CN201420731382.0U CN201420731382U CN204203163U CN 204203163 U CN204203163 U CN 204203163U CN 201420731382 U CN201420731382 U CN 201420731382U CN 204203163 U CN204203163 U CN 204203163U
- Authority
- CN
- China
- Prior art keywords
- hydrate
- gas
- monitoring
- spike
- unit
- 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
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The utility model discloses a kind of system of monitoring hydrate and generating, comprise spike gas injection unit, hydrate generates monitoring means, temperature and pressure detecting unit, collecting unit, described hydrate is generated monitoring means and comprises being connected successively by circuit and form the power supply E of closed loop, receive peace reometer, resistance R1, switch S, spike gas sensor, slide rheostat R2, described spike gas sensor comprises the negative electrode and anode that are oppositely arranged, described anode comprises by the electrode of silicon wafer to manufacture and is bonded at the bottom of the silicon wafer-based on electrode inner surface by conductive double sided adhesive tape, on at the bottom of described silicon wafer-based, growth or employing screen printing are brushed with carbon nano pipe array film.The utility model have employed the change of the method measure gas concentrations of non-self-maintained discharge ionized gas, and in conjunction with the change of temperature, pressure, judges whether generate hydrate in reactor unit with this, and the result of monitoring is more reliable, and precision is higher.
Description
Technical field
The utility model relate to utilize tracer gas monitor hydrate generate field, be specifically related to a kind of monitor hydrate generate system.
Background technology
In industrial gas oil, the research for gas hydrate has realistic meaning.From the rock gas of gas well extraction after the cooling of class throttling valve reducing pressure by regulating flow, in long distance gas transmission pipeline and oil field gas gathering network, the gas such as carbon dioxide, sulfuretted hydrogen and low molecular weight hydrocarbons can form hydrate under certain temperature and pressure condition, thus occluding device and air delivering pipeline, not only to impacting smoothly of producing, also can cause security incident.Therefore, for preventing natural-gas transfer pipeline from blocking caused economic loss because forming hydrate, be necessary that the monitoring method to hydrate generates is studied.
The monitoring that gas hydrate generate mainly contains two classes, one class is by temperature, the pressure of monitoring system, showing the isoparametric change of the viscosity of sample, conductivity, coefficient of heat conductivity and torque gauge, is namely that the situation of change of the various parameters of monitoring experiment device is to determine the generation point of hydrate; Another kind of is the method utilizing visible observation, namely uses the record such as monitor, video camera, thus determines the formation point of hydrate.
Monitoring hydrate generation method conventional at present mainly concentrates in the research to hydrate in dynamic and static state experimental provision, because static experiment apparatus structure is simple, easy to operate, cost is lower, is therefore widely used by gas hydrate study mechanism.The people such as Zhao Jiankui apply RUSKA fall-ball type high pressure viscosity proving installation and test the viscosity B coefficent that hydrate generates front and back, but the uncertainty of error is also more.The people such as Zhou Xitang measure the resistance variations that hydrate generates local, front and back, but the resistance variations of parts different in system has otherness.Although these can provide certain referential for monitoring hydrate generates, or unreliable, insufficient.
, compare other hydrate gas under certain condition, spike gas is a kind of object very easily generating hydrate, based on this, devises a kind of method of early monitoring hydrate, by tracer gas SF
6gas is filled in system, the change of trace gas concentration in monitoring system, and the change of articulated system temperature, pressure, thus reaches the object of monitoring hydrate generation.
Current SF
6the detection technique of gas mainly contains electrochemical process, electron capture method, acoustic method, trace method, optical method, the methods such as ionization method.
Electrochemical process utilizes SF
6issue biochemical reaction with catalyzer at the high temperature of about 200 DEG C, thus cause the change of electric signal, electrochemical sensor detects the concentration of gas by faradic change.The major advantage of electrochemical sensor is the high sensitivity of gas and good selectivity, and weak point is that sensitivity is higher, and drift is larger, decays faster.Uv electron prize law utilizes SF
6gas molecule can catch the characteristic of free-moving electronics to measure SF
6the concentration of gas, this method is highly sensitive, but measuring equipment volume is large, is not suitable for large area on-line monitoring.Acoustic method utilizes sound wave at SF
6velocity of propagation in the gas feature slower than the velocity of propagation in its air detects, and its sensitivity detected is low, is not suitable for large area on-line monitoring.Trace method utilizes SF
6gas absorption characteristic, at SF
6certain material is added, SF in gas
6molecule can produce absorption to this material, is equivalent to SF
6do a mark, then by detecting this amount of substance, indirect inspection SF
6gas concentration, this method precision is very high, and shortcoming needs assist gas, and cost is high.Optical method utilizes langbobier law, namely measures certain specific absorption spectrum of gas to be measured, can get rid of the quick on-line monitoring of other gases to gas concentration to be measured.But the gas absorption light path often designed is too little, and sensitivity is very low, improve even if absorb light path, cause checkout equipment volume excessive, cost is high.Traditional ionization method adopts high-tension method to make gas generation breakdown potential from ratio juris to measure SF6 gas concentration, and the shortcoming of this method is, high operation voltage, and poor stability adopts the serviceable life that also can shorten electrode in this way simultaneously.
Utility model content
Given this, the utility model provides a kind of system of monitoring hydrate and generating.Spike gas is passed into reactor unit, by regulating the electric current in discharge loop, the spike gas in spike gas sensor is made to carry out non-self-maintained discharge, by the change of electric current in loop before and after the unit process of observing response device, thus show in reactor unit, whether trace gas concentration changes, and judge whether reactor unit has hydrate to generate according to this.
For achieving the above object, the utility model takes following technical proposals to realize:
A kind of system of monitoring hydrate and generating, comprise the spike gas injection unit injecting spike gas in reactor unit, monitoring means is generated with the hydrate following the tracks of trace gas concentration change in reactor unit by electric discharge, for the temperature and pressure detecting unit of temperature and pressure change in detection reaction device unit, for gathering the collecting unit of temperature and pressure detecting unit data, the data that collecting unit gathers finally are sent to data processing unit, the generation wherein whether having hydrate is judged by it, described hydrate is generated monitoring means and comprises being connected successively by circuit and form the power supply E of closed loop, receive peace reometer, resistance R
1, switch S, spike gas sensor, slide rheostat R
2described spike gas sensor is located in reactor unit, for gas provides electric discharge place, comprise the negative electrode and anode that are oppositely arranged, described negative electrode is made up of silicon chip, for electron emission, described anode comprises by the electrode of silicon wafer to manufacture and is bonded at the bottom of the silicon wafer-based on electrode inner surface by conductive double sided adhesive tape, and at the bottom of described silicon wafer-based, growth or employing screen printing are brushed with carbon nano pipe array film.
Further, described power supply E is direct current or AC power.
Further, separate with mica-sheet insulation between described negative electrode and anode.
Further, the negative electrode of described spike gas sensor, anode, mica sheet epoxy resin cling and fix.
Further, the top of described spike gas sensor and bottom are provided with bleeder vent with mutually staggering, and described bleeder vent place is provided with by the microporous membrane of teflon through expanded stretching.
Further, described spike gas bag draws together SF
6, H
2s, CCl
2f
2.These spike gas can generate hydrate at first, thus can be reached through its concentration change and judge the object that hydrate generates.
The method adopting described system monitoring hydrate to generate, comprises step:
By spike gas injection unit, spike gas is injected in reactor unit;
Closing Switch S, regulates described slide rheostat R
2make the spike gas in trace gas sensor 7 carry out non-self-maintained discharge between negative electrode 1 and anode 2, and receive peace reometer numerical value when recording that before the reaction, described spike gas carries out non-self-maintained discharge between negative electrode 1 and anode 2;
Stop stirring slide rheostat R
2by the change pacifying reometer numerical value of receiving in loop before and after the unit process of observing response device, thus show in reactor unit, whether trace gas concentration changes, if electric current diminishes, represent that spike gas concentration reduces, if ER effect is greatly, represent that spike gas concentration raises;
Temperature and pressure value in the reactor unit detected by temperature and pressure detecting unit before and after reaction is delivered to data processing unit by collecting unit;
Data processing unit calculates the difference of temperature and pressure before and after reaction in reactor unit, judged whether that hydrate generates in conjunction with trace gas concentration change simultaneously,, even temperature rises, pressure reduces and spike gas concentration declines, or, if temperature rises, pressure is constant and spike gas concentration declines, or, if temperature-resistant, pressure reduces and spike gas concentration declines, or, if temperature-resistant, pressure is constant and spike gas concentration decline time, then indicate that hydrate generates.
The utility model, compared with the technology of existing monitoring hydrate, has the following advantages:
(1) the various the physical-chemical parameters affecting system with existing major part by directly monitoring hydrate and generating change unlike, the utility model is the change that monitoring easily generates the gas concentration of hydrate, provides a kind of method of monitoring gas hydrate synthesis of novelty;
(2) method that traditional monitoring hydrate generates is that single variation diagram in time respectively from system temperature or pressure judges, and the leakage of experimental provision also can cause the reduction of pressure, thus the judgement that can make the mistake.The utility model adopts the change of trace gas concentration in monitoring system, simultaneously the change of articulated system temperature and pressure, and the judgement made is more accurately reliable.
(3) the utility model have employed the change of the method measure gas concentrations of non-self-maintained discharge ionized gas; compare the method for self-maintained discharge measure gas concentrations; reduce operating voltage; make operation safer; measurement result repeatability is strong, and not only measuring accuracy is high, and protects the anode of carbon nano-tube; extend sensor life-time, provide cost savings.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the utility model embodiment.
Fig. 2 is the spike gas sensor inner structure schematic diagram of the utility model embodiment.
Fig. 3 is the spike gas sensor schematic top plan view of the utility model embodiment.
Fig. 4 is the spike gas sensor elevational schematic view of the utility model embodiment.
In figure: 1-negative electrode; 2-anode; At the bottom of 3-silicon wafer-based; 4-electrode; 5-carbon nano pipe array film; 6-mica sheet; 7-spike gas sensor; 8-bleeder vent.
Embodiment
Be described in further detail utility model object of the present utility model below in conjunction with the drawings and specific embodiments, embodiment can not repeat one by one at this, but therefore embodiment of the present utility model is not defined in following examples.
Below in conjunction with accompanying drawing, the utility model is clearly and completely described.
embodiment one
As shown in Figure 1 to Figure 2, a kind of system of monitoring hydrate and generating, comprise the spike gas injection unit injecting spike gas in reactor unit, monitoring means is generated with the hydrate following the tracks of trace gas concentration change in reactor unit by electric discharge, for the temperature and pressure detecting unit of temperature and pressure change in detection reaction device unit, for gathering the collecting unit of temperature and pressure detecting unit data, the data that collecting unit gathers finally are sent to data processing unit, the generation wherein whether having hydrate is judged by it, described hydrate is generated monitoring means and comprises and to be connected successively the direct current or AC power E that form closed loop by circuit, receive peace reometer, resistance R
1, switch S, spike gas sensor 7, slide rheostat R
2described spike gas sensor 7 is located in reactor unit, for gas provides electric discharge place, comprise the negative electrode 1 and anode 2 that are oppositely arranged, described negative electrode 1 is made up of silicon chip, for electron emission, described anode 2 is comprised by the electrode 4 of silicon wafer to manufacture and is bonded at by conductive double sided adhesive tape on electrode 4 inner surface at the bottom of silicon wafer-based 3, at the bottom of described silicon wafer-based, growth or adopt screen printing to be brushed with carbon nano pipe array film 5 on 3, for generation of the electric field intensity of a high strength, makes gas ionization.
In the present embodiment, described spike gas sensor, is mainly gas and provides electric discharge place, and wherein, described direct current or AC power E are used for providing a voltage to loop; Described peace reometer of receiving is for the electric current in measuring circuit; Described resistance R
1for the electric current in limit circuit, prevent electric current excessive, burn out reometer; Described slide rheostat R
2for the voltage distribution in control loop, regulate the operating voltage at spike gas sensor two ends, what spike gas was wherein carried out is non-self-maintained discharge; Described switch S, for closed discharge loop, controls the carrying out of gas discharge.
Further, separate with mica sheet 6 insulation between described negative electrode 1 and anode 2.
Further, the negative electrode 1 of described spike gas sensor 7, anode 2, mica sheet 6 cling with epoxy resin and fix.
As shown in Figure 3 and Figure 4, the external structure of described spike gas sensor 7 is made up of top and bottom two parts, be convenient to installation and removal, top and bottom are provided with bleeder vent 8 with mutually staggering, and described bleeder vent 8 place is provided with by the microporous membrane of teflon through expanded stretching.Microporous membrane is by teflon through expanded stretching, and wherein the aperture of micropore is greater than the aperture of water vapor and is less than the diameter of the globule, and described spike gas bag draws together SF
6, H
2s, CCl
2f
2deng the easy gas generating hydrate, the present embodiment adopts SF
6, gaseous molecular, comprises SF
6gas can pass through microporous membrane, and fluent meterial will be stopped, thus reaches the effect of waterproof and breathable, and micro channel forms net vertical body structure in film simultaneously, and evenly intensive micropore distribution, hinders dust to enter in spike gas sensor 7.
Described spike gas sensor 7 is that hydrate generates the core of monitoring means, is to monitor hydrate based on the principle of gas discharge to start to generate point.In view of gas breakdown sparking voltage is very large, and voltage breakdown size is relevant with many environmental factors, and disruptive discharge electric current is also unstable, also can destroy the surface of sparking electrode simultaneously, causes the serviceable life of electrode short.What adopt here is gas non-self-maintained discharge method before breakdown, and namely the voltage at spike gas sensor 7 two ends is lower than spike gas voltage breakdown in this special case, the shortcomings can avoided disruptive discharge like this and bring.Adopt the method for non-self-maintained discharge to have repeatability strong, measuring accuracy is high, the advantage such as to reduce expenses.Usual gas is good insulating body, in order to make gaseous conduction, must give the voltage that gas-loaded one is very high, or the electric field intensity that one very high, makes gas ionization.Adopt Carbon Nanotube Electrodes by Electric from gas, gas ionization can be made under operating voltage is far below the voltage breakdown under traditional electrode.Given this, the utility model adopts carbon nano-tube film sensor to detect gas concentration, this sensor has the irreplaceable advantage of conventional sensors: one is that carbon nano-tube has nano level radius-of-curvature, the operating voltage of sensor can be reduced greatly, very large non-homogeneous local electric field strength can be produced simultaneously, not only do not affect ionisation of gas, the security of operation can also be improved; Two is that carbon nano-tube has very large specific surface area, can provide a large amount of passages, improve the sensitivity of gasmetry for gas; Three is the working temperatures greatly reducing gas sensor, improves the stability of sensor; Four is the sizes that can reduce gas sensor, can also shorten the response time of sensor.Due to carbon nano-tube material make negative electrode time, negative electrode can ionized gas positive ion can long-time bombardment, cause carbon nano-tube material to shorten serviceable life, therefore, carbon nano-tube material is used as the anode of sensor by the utility model.When in hydrate monitoring means loop, reometer registration changes, the temperature, pressure change of coupling system, can make the judgement that hydrate in system starts to be formed, otherwise hydrate is not formed simultaneously.
embodiment two
The method adopting described system monitoring hydrate to generate, comprises step:
Step 1, be injected in reactor unit by spike gas injection unit by spike gas, described spike gas bag draws together SF
6, H
2s, CCl
2f
2deng the easy gas generating hydrate, the present embodiment adopts SF
6;
Step 2, Closing Switch S, regulate described slide rheostat R
2make the spike gas in trace gas sensor 7 carry out non-self-maintained discharge between negative electrode 1 and anode 2, and receive peace reometer numerical value when recording that before the reaction, described spike gas carries out non-self-maintained discharge between negative electrode 1 and anode 2;
Step 3, stopping stir slide rheostat R
2by the change pacifying reometer numerical value of receiving in loop before and after the unit process of observing response device, thus show in reactor unit, whether trace gas concentration changes, if electric current diminishes, represent that spike gas concentration reduces, if ER effect is greatly, represent that spike gas concentration raises;
Temperature and pressure value in the reactor unit detected by temperature and pressure detecting unit before and after reaction is delivered to data processing unit by step 4, collecting unit;
Step 5, data processing unit calculate the difference of temperature and pressure before and after reaction in reactor unit, judged whether that hydrate generates in conjunction with trace gas concentration change simultaneously,, even temperature rises, pressure reduces and spike gas concentration declines, or, if temperature rises, pressure is constant and spike gas concentration declines, or, if temperature-resistant, pressure reduces and spike gas concentration declines, or, if temperature-resistant, pressure is constant and spike gas concentration decline time, then indicate that hydrate generates.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., within the protection domain that all should be included in the utility model claim.
Claims (6)
1. the system of monitoring hydrate and generating, comprise in reactor unit, inject spike gas spike gas injection unit, by electric discharge with follows the tracks of reactor unit trace gas concentration change hydrate generate monitoring means, in detection reaction device unit temperature and pressure change temperature and pressure detecting unit, for gathering the collecting unit of temperature and pressure detecting unit data, it is characterized in that:
Described hydrate generate monitoring means comprise by circuit connect successively form closed loop power supply E, receive peace reometer, resistance R
1, switch S, spike gas sensor (7), slide rheostat R
2described spike gas sensor (7) is located in reactor unit, for gas provides electric discharge place, comprise the negative electrode (1) and anode (2) that are oppositely arranged, described negative electrode (1) is made up of silicon chip, for electron emission, described anode (2) is comprised by the electrode of silicon wafer to manufacture (4) and is bonded at by conductive double sided adhesive tape on electrode (4) inner surface at the bottom of silicon wafer-based (3), (3) at the bottom of described silicon wafer-based upper growth or adopt screen printing to be brushed with carbon nano pipe array film (5).
2. the system of monitoring hydrate generation according to claim 1, is characterized in that: described power supply E is direct current or AC power.
3. the system of monitoring hydrate generation according to claim 1, is characterized in that: separate with mica sheet (6) insulation between described negative electrode (1) and anode (2).
4. the system of monitoring hydrate generation according to claim 3, is characterized in that: the negative electrode (1) of described spike gas sensor (7), anode (2), mica sheet (6) cling with epoxy resin and fix.
5. the system of monitoring hydrate generation according to claim 1, it is characterized in that: top and the bottom of described spike gas sensor (7) are provided with bleeder vent (8) with mutually staggering, and described bleeder vent (8) place is provided with by the microporous membrane of teflon through expanded stretching.
6. the system of monitoring hydrate generation according to claim 1, is characterized in that: described spike gas bag draws together SF
6, H
2s, CCl
2f
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420731382.0U CN204203163U (en) | 2014-11-28 | 2014-11-28 | A kind of system of monitoring hydrate and generating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420731382.0U CN204203163U (en) | 2014-11-28 | 2014-11-28 | A kind of system of monitoring hydrate and generating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204203163U true CN204203163U (en) | 2015-03-11 |
Family
ID=52661108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420731382.0U Active CN204203163U (en) | 2014-11-28 | 2014-11-28 | A kind of system of monitoring hydrate and generating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204203163U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407042A (en) * | 2014-11-28 | 2015-03-11 | 华南理工大学 | System and method for monitoring hydrate formation |
| CN106970182A (en) * | 2017-04-21 | 2017-07-21 | 上海纳晶科技有限公司 | A kind of apparatus and method of on-line checking mixed gas concentration |
-
2014
- 2014-11-28 CN CN201420731382.0U patent/CN204203163U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407042A (en) * | 2014-11-28 | 2015-03-11 | 华南理工大学 | System and method for monitoring hydrate formation |
| CN104407042B (en) * | 2014-11-28 | 2017-04-05 | 华南理工大学 | A kind of method that monitoring hydrate is generated |
| CN106970182A (en) * | 2017-04-21 | 2017-07-21 | 上海纳晶科技有限公司 | A kind of apparatus and method of on-line checking mixed gas concentration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102778499B (en) | Gas detection method | |
| CN104407042A (en) | System and method for monitoring hydrate formation | |
| CN204203163U (en) | A kind of system of monitoring hydrate and generating | |
| WO2017181955A1 (en) | Dust concentration detection device and dust concentration detection method | |
| CN103926299B (en) | Gas sensor | |
| CN103308634A (en) | Device and method for measuring gas content | |
| CN105181750B (en) | Tubing internal coating device for detecting leak point | |
| CN101949889B (en) | Drug explosive ion mobility spectrum detection device | |
| CN109580133A (en) | Based on the liquid leakage detection sensor of single electrode friction nanometer power generator and application | |
| CN106290546B (en) | Ionic migration spectrometer | |
| CN106370234A (en) | Testing method and testing apparatus for temperature and suction resistance of electronic cigarette | |
| CN204287033U (en) | A kind of hydrate based on optics generates monitoring system | |
| CN206057591U (en) | A kind of integrated form measurement chamber of emanometer | |
| US6969851B1 (en) | Ion-mobility spectrometry sensor for NOx detection | |
| CN202995976U (en) | Harmful gas leakage alarm | |
| CN103854954A (en) | Thermal desorption membrane inlet high field asymmetry waveform ion migration spectrometer | |
| CN202939104U (en) | Propionic acid gas static detection device | |
| CN105548341B (en) | A kind of foul gas monitoring method and monitor | |
| CN205484194U (en) | Dbd ionization detector | |
| CN202041304U (en) | Temperature sensor for simulating blood plasma by fully-closed glycerin solvent bottle | |
| CN207689089U (en) | A kind of transformer Oil Leakage Detecting and the device of alarm | |
| CN206488894U (en) | A kind of oily leak detection warning device of high-frequency sasser capacitance method | |
| CN206594122U (en) | A kind of constant temperature ion chromatography electric conductivity detector | |
| CN110806554A (en) | Calibration method of PVC cable gas detector | |
| JP2777304B2 (en) | Abnormality diagnosis apparatus and diagnosis method for perfluorocarbon input device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |