CN107607437A - A kind of high-precision automatic shale air content tester and method of testing - Google Patents
A kind of high-precision automatic shale air content tester and method of testing Download PDFInfo
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- CN107607437A CN107607437A CN201711022714.2A CN201711022714A CN107607437A CN 107607437 A CN107607437 A CN 107607437A CN 201711022714 A CN201711022714 A CN 201711022714A CN 107607437 A CN107607437 A CN 107607437A
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Abstract
The invention belongs to shale reservoir assessment technique field, and disclosing a kind of high-precision automatic shale air content tester and method of testing, instrument includes：Desorption apparatus, water circle device, the first gas collecting apparatus, the second gas collecting apparatus, magnetic valve, stripping gas collection device, programmable logic controller；First gas collecting apparatus and the second gas collecting apparatus are connected by magnetic valve with water circle device, desorption apparatus, stripping gas collection device；Programmable logic controller is connected with the first gas collecting apparatus, the second gas collecting apparatus, desorption apparatus, water circle device, magnetic valve respectively.Method includes：Desorption preparation, desorption experiment, desorption terminate.The present invention solve the problems, such as shale air content test automation degree is low in the prior art, need manual intervention, portable degree it is low, can not it is multigroup measurement or measurement accuracy it is not high enough, automatic measurement is reached, the testing efficiency and precision of instrument are improved, ensures the technique effect of the integrality of detection process stripping gas data.
Description
Technical field
The present invention relates to shale reservoir assessment technique field, more particularly to a kind of high-precision automatic shale air content to test
Instrument and method of testing.
Background technology
Shale gas is that one kind is present in shale, is born from the unconventional gas resource of storage certainly.Shale air content is shale
The key parameter of evaluating reservoir, it is significant to shale gassiness evaluation, reserve forecasting.Shale air content in China's is led at present
Cross and use desorption method, obtain loss gas, stripping gas, the data of three parts of residual gas.Wherein residual volume only accounts for shale gassiness
The only a few part of amount and it need to be tested in laboratory；Gas desorption quantity is to utilize shale gassiness tester, passes through live rock
Heart sample desorption experiment directly obtains；Loss tolerance is the tolerance of rock core loss in drilling process, can not directly be measured, generally
Obtained indirectly by approximating method estimation based on stripping gas data.The accuracy of shale air content parameter largely relies on
In stripping gas data accurately and completely, this requires shale air content test equipment accurately must intactly obtain stripping gas survey
Try data.
China shale gas air content test equipment at this stage still suffer from test automation degree is low, need manual intervention,
Portable degree is low, have can not it is multigroup measurement or measurement accuracy it is not high enough the problems such as, largely have impact on on-the-spot test
The degree of accuracy and efficiency.At present, the method for testing that shale air content test equipment uses has electronic measurement method and human metering method.
Tester's labor intensity is big by the way of human metering, and the data of artificial reading collection are discontinuous, and error in reading is big, by
Gradually replaced by electronic measurement mode.Main using electronic measurement method includes flowmeter measurement Law, weight scaling method and mangneto
Telescoping sensor liquid level method of testing etc..But the above method still has problems with：Some stripping gas continuous modes automate journey
Spend low, it is necessary to which manual intervention, detection data can be interrupted；Some instrument and equipments are excessively huge, are not easy to be transported to work on the spot；Have
Do not consider influence of the temperature, pressure to eudiometry result, application condition is big；Have can not be multigroup and meanwhile measure, largely
On have impact on on-the-spot test efficiency, to loss gas estimation can also produce certain influence.
The content of the invention
The embodiment of the present application solves by providing a kind of high-precision automatic shale air content tester and method of testing
Shale air content test automation degree is low in the prior art, needs that manual intervention, portable degree are low, multigroup can not measure
Or measurement accuracy it is not high enough the problem of.
The embodiment of the present application provides a kind of high-precision automatic shale air content tester, including：Desorption apparatus, water follow
Loop device, the first gas collecting apparatus, the second gas collecting apparatus, magnetic valve, stripping gas collection device, programmable logic controller；
First gas collecting apparatus and second gas collecting apparatus pass through the magnetic valve and the water circle device, institute
State desorption apparatus, stripping gas collection device connection；
The programmable logic controller respectively with first gas collecting apparatus, second gas collecting apparatus, the desorption
Device, water circle device connection；
The programmable logic controller (PLC) is connected with the magnetic valve, and controls the folding of the magnetic valve.
Preferably, the magnetic valve includes the first magnetic valve, second solenoid valve, the 3rd magnetic valve, the 4th magnetic valve, the 5th
Magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve；
The entrance of first magnetic valve, the entrance of the second solenoid valve are connected with the desorption apparatus respectively；It is described
The outlet of first magnetic valve connects the air inlet of first gas collecting apparatus, the outlet connection described second of the second solenoid valve
The air inlet of gas collecting apparatus；
Entrance, the entrance of the 4th magnetic valve of 3rd magnetic valve are connected with the water circle device respectively；Institute
The outlet for stating the 3rd magnetic valve connects the water inlet of first gas collecting apparatus, the outlet connection of the 4th magnetic valve described the
The water inlet of two gas collecting apparatus；
The entrance of 5th magnetic valve connects the exhaust outlet of first gas collecting apparatus, the entrance of the 6th magnetic valve
Connect the exhaust outlet of second gas collecting apparatus；The exporting of 5th magnetic valve, the outlet of the 6th magnetic valve respectively with
The stripping gas collection device connection；
The entrance of 7th magnetic valve connects the discharge outlet of first gas collecting apparatus, the entrance of the 8th magnetic valve
Connect the discharge outlet of second gas collecting apparatus；The exporting of 7th magnetic valve, the outlet of the 8th magnetic valve respectively with
The water circle device connection.
Preferably, the desorption apparatus includes solution cucurbitula and temperature sensor；
The water circle device includes tank and numerical control pump；
First gas collecting apparatus includes the first gas bottle, the first liquid level sensor, the first pressure transducer；Described second
Gas collecting apparatus includes the second gas bottle, the second liquid level sensor, the second pressure transducer；
First liquid level sensor is arranged on the lower section of first gas bottle, and first pressure transducer is arranged on
The top of first gas bottle；Second liquid level sensor is arranged on the lower section of second gas bottle, second pressure
Strong sensor is arranged on the top of second gas bottle；
The programmable logic controller respectively with the temperature sensor, the numerical control pump, first level sensing
Device, first pressure transducer, second liquid level sensor, second pressure transducer connection.
Preferably, first gas bottle has the first height and the first internal diameter, and second gas bottle has second high
Degree and the second internal diameter；First height and described second highly identical, second internal diameter is the 2-3 of first internal diameter
Times.
Preferably, the top side of first gas bottle and second gas bottle is provided with water inlet, air inlet, exhaust
Mouthful, the lower section side of first gas bottle and second gas bottle is provided with discharge outlet.
The embodiment of the present application provides a kind of shale gassiness weight testing method, comprises the following steps：
Step S1：Desorption prepares；
The desorption preparation includes：Magnetic valve is controlled, the water in water circle device is pumped into the first gas collecting apparatus, described in
First gas collecting apparatus is full of water；Magnetic valve is controlled, the water in water circle device is pumped into the second gas collecting apparatus, to the described second collection
Device of air is full of water；
Step S2：Desorption experiment；
The desorption experiment includes：By programmable logic controller to first gas collecting apparatus and second gas collection
The water level and stream of device are automatically controlled, and make the water in first gas collecting apparatus and second gas collecting apparatus is past to reestablish diplomatic relations
For emptying without interruption and supplement；
Obtain and record first gas collecting apparatus and the volume of shale gas that second gas collecting apparatus is collected respectively；
Step S3：Desorption terminates；
The desorption end includes：Repeat step S2, until first gas collecting apparatus or second gas collecting apparatus are received
The volume of the shale gas of collection is less than the volume for entering desorption ending phase set；
When first gas collecting apparatus reaches the condition that shale gas desorption terminates, tired out by the programmable logic controller
Meter calculates and records the volume of shale gas in stripping gas collection device.
Preferably, the desorption preparation includes：
Step S1.1：The 3rd magnetic valve, the 5th magnetic valve are opened, starts the numerical control pump in the water circle device, by institute
The first gas bottle that the water in water circle device in tank is pumped into first gas collecting apparatus is stated, is filled to first gas bottle
Full water；
Step S1.2：The 3rd magnetic valve, the 5th magnetic valve are closed, opens the 4th magnetic valve, the 6th magnetic valve,
Water in the tank is pumped into the second gas bottle in second gas collecting apparatus, water is full of to second gas bottle, closes
The numerical control pump is closed, closes the 4th magnetic valve, the 6th magnetic valve；
The desorption experiment includes：
Step S2.1：The first magnetic valve is opened, first gas bottle connects desorption apparatus, opens the 7th magnetic valve, institute
State the first gas bottle and start draining gas collection；
Temperature sensor in the desorption apparatus records the temperature of the desorption apparatus, first gas collecting apparatus in real time
In the first liquid level sensor record pressure difference in first gas bottle in real time, the first pressure in first gas collecting apparatus
Pressure difference in first gas bottle is scaled by strong sensor Microprocessor System for Real Time Record pressure, the programmable logic controller
The volume of shale gas, and record the volume of this caused shale gas；
Step S2.2：First liquid level sensor detects when shale gas is full of in first gas bottle, described
The draining gas collection of one gas bottle terminates, and closes first magnetic valve, the 7th magnetic valve, opens second solenoid valve, described
Desorption apparatus connects second gas bottle, opens the 8th magnetic valve, and second gas bottle starts draining gas collection；
Open the 3rd magnetic valve, the 5th magnetic valve, start the numerical control pump, first gas bottle start into
Water；When first gas bottle is full of water, the 3rd magnetic valve, the 5th magnetic valve are closed, closes the numerical control pump；
The temperature sensor records the temperature of the desorption apparatus in real time, the second liquid level in second gas collecting apparatus
Sensor records the pressure difference in second gas bottle in real time, and the second pressure transducer in second gas collecting apparatus is real-time
Pressure difference in second gas bottle is scaled the body of shale gas by record system pressure, the programmable logic controller
Product, and record the volume of this caused shale gas；
Step S2.3：Second liquid level sensor measures when shale gas is full of in second gas bottle, and described
Two gas bottle draining gas collections terminate, and close the second solenoid valve, the 8th magnetic valve, open first magnetic valve, institute
State desorption apparatus and connect first gas bottle, open the 7th magnetic valve, first gas bottle starts draining gas collection；
Open the 4th magnetic valve, the 6th magnetic valve, start the numerical control pump, second gas bottle start into
Water；When second gas bottle is full of water, the 4th magnetic valve, the 6th magnetic valve are closed, closes the numerical control pump；
The temperature sensor records the temperature of desorption apparatus in real time, and record first collects first liquid level sensor in real time
Pressure difference in gas cylinder, the first pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller is by described in
Pressure difference in first gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas；
Step S2.4：Repeat step S2.2- step S2.3, until first gas bottle or second gas bottle are per small
When the volume of shale gas collected within 5 milliliters；
The condition that the shale gas desorption terminates is first condition, one kind in second condition, third condition, the desorption
End includes：
Step S3.1：The desorption experiment is terminated with the first condition, i.e., described desorption apparatus connection second collection
During gas cylinder, the second solenoid valve, the 8th magnetic valve are closed, opens first magnetic valve, the desorption apparatus connection
First gas bottle, the 7th magnetic valve is opened, first gas bottle starts draining gas collection until shale gas desorption knot
Beam；
The temperature sensor records the temperature of the desorption apparatus in real time, and second liquid level sensor records institute in real time
State the pressure difference in the second gas bottle, the second pressure transducer Microprocessor System for Real Time Record pressure, the Programmable logical controller
Pressure difference in second gas bottle is scaled the volume of shale gas by device, and records the volume of this caused shale gas,
It is designated as Vn-1；
The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records institute in real time
State the pressure difference in the first gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the Programmadle logic control
Pressure difference in first gas bottle is scaled the volume of shale gas by device, and records the volume of this caused shale gas,
It is designated as Vn；Wherein, n is the total degree of draining gas collection；
Step S3.2：The desorption experiment is terminated with the second condition, i.e., described desorption apparatus connection first collection
Gas cylinder, and the height of the first gas bottle reclaimed water be more than the first gas bottle height half when, first gas bottle
Continue draining gas collection until shale gas desorption terminates；
The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records institute in real time
State the pressure difference in the first gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the Programmadle logic control
Pressure difference in first gas bottle is scaled the volume of shale gas by device, and records the volume of this caused shale gas,
It is designated as Vn；Wherein, n is the total degree of draining gas collection；
Step S3.3：The desorption experiment is terminated with the third condition, i.e., described desorption apparatus connection first collection
Gas cylinder, and the height of the first gas bottle reclaimed water be less than the first gas bottle height half when, close it is described first electricity
Magnet valve, the 7th magnetic valve, the second solenoid valve is opened, the desorption apparatus connects second gas bottle, opens institute
The 8th magnetic valve is stated, second gas bottle starts draining gas collection；
The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records institute in real time
State the pressure difference in the first gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the Programmable logical controller
Pressure difference in first gas bottle is scaled the volume of shale gas by device, and records the volume of this caused shale gas,
It is designated as Vn-2；
The temperature sensor records the temperature of the desorption apparatus in real time, and second liquid level sensor records institute in real time
State the pressure difference in the second gas bottle, the second pressure transducer Microprocessor System for Real Time Record pressure, the Programmable logical controller
Pressure difference in second gas bottle is scaled the volume of shale gas by device, and records the volume of this caused shale gas,
It is designated as Vn-1；
Open the 3rd magnetic valve, the 5th magnetic valve, start the numerical control pump, first gas bottle start into
Water, when first gas bottle is full of water, the numerical control pump is closed, close the second solenoid valve, the 8th magnetic valve, beat
First magnetic valve is driven, the desorption apparatus connects first gas bottle, opens the 7th magnetic valve, first collection
Gas cylinder starts draining gas collection to shale gas desorption and terminated；
The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records institute in real time
The pressure difference in the first gas bottle is stated, the first pressure transducer Microprocessor System for Real Time Record pressure, is terminated to desorption experiment, it is described
Pressure difference in first gas bottle is scaled the volume of shale gas by programmable logic controller, and is recorded caused by this
The volume of shale gas, is designated as Vn；Wherein, n is the total degree of draining gas collection.
Preferably, the body for the shale gas that the condition that the shale gas desorption terminates is collected per hour for first gas bottle
Product is within 0.2 milliliter.
Preferably, when the data of first gas bottle are recorded in the desorption experiment in real time, the calculating of shale air volume
Formula is：
In formula：VsShale gas measures volume, 1≤s≤n when being measured for the s times；R is the half of first gas bottle
Footpath, h be first gas bottle height, Δ PsFor the pressure in first gas bottle of first liquid level sensor record
Strong poor, ρ is the density of water；
When recording the second gas bottle data in the desorption experiment in real time, the calculation formula of shale air volume is：
In formula：VtShale gas measures volume, 2≤t≤n-1 when being measured for the t times；R is second gas bottle
Radius, H be second gas bottle height, Δ PtIn second gas bottle for second liquid level sensor record
Pressure difference, ρ are the density of water.
Preferably, it is right after the programmable logic controller (PLC) carries out DATA REASONING since for the first time to shale air volume
Pendulous frequency is added up；
At the end of the desorption experiment is with the first condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
At the end of the desorption experiment is with the second condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
At the end of the desorption experiment is with the third condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
In formula：V is the volume of shale gas in the stripping gas collection device, and a is the volume of first gas bottle, and b is
The volume of second gas bottle, n are the total degree of draining gas collection；
The volume calculation formula of shale gas is under standard state：
In formula：P is the system pressure recorded in real time；T is the temperature recorded in real time.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
In the embodiment of the present application, the pattern of the reciprocal alternation of twin containers is devised, ensure that the company of measurement process
Continuous property simultaneously, improves the automaticity of measurement work；Devise the switching device using magnetic valve as control unit, and by its
It is connected with double gas collecting apparatus, " seamless " switching between double gas collecting apparatus can be completed, test process measurement data is continuous not
Interruption；Double gas collecting apparatus water levels and stream are automatically controlled by programmable logic controller (PLC), made in double gas collecting apparatus
Water avoids manual intervention process, realizes detection process automatic measurement, significantly toward complex Alternating formula emptying free of discontinuities and supplement
The testing efficiency and precision of instrument are improved, while ensure that the integrality of detection process stripping gas data, for loss tolerance
Accurate fitting is laid a good foundation.High-precision automatic shale air content tester provided by the invention is stable and reliable for performance, tool
There is the advantages of degree of accuracy height, favorable reproducibility, high automaticity.
Brief description of the drawings
It is required in being described below to embodiment to use in order to illustrate more clearly of the technical scheme in the present embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are one embodiment of the present of invention, for this area
For those of ordinary skill, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of high-precision automatic shale air content tester provided in an embodiment of the present invention
Figure；
Fig. 2 is gas collecting apparatus in a kind of high-precision automatic shale air content tester provided in an embodiment of the present invention
Structural representation；
Fig. 3 is a kind of flow chart of shale gassiness weight testing method provided in an embodiment of the present invention；
It during Fig. 3 desorptions prepare is flow chart that continuous gas collection is prepared that Fig. 4, which is,；
Fig. 5 is the experiment flow figure of continuous gas collection in Fig. 3 desorption experiments；
Fig. 6 be in Fig. 3 desorption experiments continuous gas collection with the flow chart at the end of first condition；
Fig. 7 be in Fig. 3 desorption experiments continuous gas collection with the flow chart at the end of second condition；
Fig. 8 be in Fig. 3 desorption experiments continuous gas collection with the flow chart at the end of third condition.
Wherein, 1- desorption apparatus；11- temperature sensors, 12- solution cucurbitulas；
2- magnetic valves；The magnetic valves of 21- first, 22- second solenoid valves, the magnetic valves of 23- the 3rd, the magnetic valves of 24- the 4th, 25-
5th magnetic valve, the magnetic valves of 26- the 6th, the magnetic valves of 27- the 7th, the magnetic valves of 28- the 8th；
The gas collecting apparatus of 31- first, the gas collecting apparatus of 32- second；
The gas bottles of 310- first, the liquid level sensors of 311- first, the pressure transducers of 312- first, 313- water inlets, 314-
Air inlet, 315- exhaust outlets, 316- discharge outlet；
3111- up-samplings head, 3112- down-sampling heads；
The gas bottles of 320- second, the liquid level sensors of 321- second, the pressure transducers of 322- second；
4- programmable logic controllers；
5- water circle devices；51- tanks, 52- numerical control pumps；
6- stripping gas collection devices.
Embodiment
The embodiment of the present application solves by providing a kind of high-precision automatic shale air content tester and method of testing
Shale air content test automation degree is low in the prior art, needs that manual intervention, portable degree are low, multigroup can not measure
Or measurement accuracy it is not high enough the problem of.
The technical scheme of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows：
A kind of high-precision automatic shale air content tester, including：Desorption apparatus, water circle device, the first gas collection
Device, the second gas collecting apparatus, magnetic valve, stripping gas collection device, programmable logic controller；
First gas collecting apparatus and second gas collecting apparatus pass through the magnetic valve and the water circle device, institute
State desorption apparatus, stripping gas collection device connection；
The programmable logic controller respectively with first gas collecting apparatus, second gas collecting apparatus, the desorption
Device, water circle device connection；
The programmable logic controller (PLC) is connected with the magnetic valve, and controls the folding of the magnetic valve.
A kind of shale gassiness weight testing method, comprises the following steps：
Step S1：Desorption prepares；
The desorption preparation includes：Magnetic valve is controlled, the water in water circle device is pumped into the first gas collecting apparatus, described in
First gas collecting apparatus is full of water；Magnetic valve is controlled, the water in water circle device is pumped into the second gas collecting apparatus, to the described second collection
Device of air is full of water；
Step S2：Desorption experiment；
The desorption experiment includes：By programmable logic controller to first gas collecting apparatus and second gas collection
The water level and stream of device are automatically controlled, and make the water in first gas collecting apparatus and second gas collecting apparatus is past to reestablish diplomatic relations
For emptying without interruption and supplement；
Obtain and record first gas collecting apparatus and the volume of shale gas that second gas collecting apparatus is collected respectively；
Step S3：Desorption terminates；
The desorption end includes：Repeat step S2, until first gas collecting apparatus or second gas collecting apparatus are received
The volume of the shale gas of collection is less than the volume for entering desorption ending phase set；
When first gas collecting apparatus reaches the condition that shale gas desorption terminates, tired out by the programmable logic controller
Meter calculates and records the volume of shale gas in stripping gas collection device.
The present invention devises the pattern of the reciprocal alternation of twin containers, in the continuity that ensure that measurement process simultaneously, carries
The high automaticity of measurement work；The switching device using magnetic valve as control unit is devised, and itself and double gas collections are filled
Put and be connected, " seamless " switching between double gas collecting apparatus can be completed, test process measurement data is continuously uninterrupted；By can
Programmed logic controller automatically controls to double gas collecting apparatus water levels and stream, make water in double gas collecting apparatus toward complex Alternating without
Discontinuous empties and supplement, avoids manual intervention process, realizes detection process automatic measurement, substantially increase instrument
Testing efficiency and precision, while the integrality of detection process stripping gas data is ensure that, established to lose the accurate fitting of tolerance
Basis.High-precision automatic shale air content tester provided by the invention is stable and reliable for performance, with degree of accuracy height, again
Existing the advantages of property is good, automaticity is high.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
The present invention provides a kind of high-precision automatic shale air content tester, as shown in figure 1, including：Desorption apparatus
1, magnetic valve 2, the first gas collecting apparatus 31, the second gas collecting apparatus 32, programmable logic controller (PLC) 4, water circle device 5, stripping gas
Collection device 6.
First gas collecting apparatus 31 and second gas collecting apparatus 32 are filled by the magnetic valve 2 and the water circulation
Put the 5, desorption apparatus 1, the stripping gas collection device 6 connects.
The programmable logic controller 4 respectively with first gas collecting apparatus 31, second gas collecting apparatus 32, described
Desorption apparatus 1, the water circle device 5 connect.
The programmable logic controller (PLC) 4 is connected with the magnetic valve 2, and controls the folding of the magnetic valve 2.
Specifically, the desorption apparatus 1 includes temperature sensor 11, solution cucurbitula 12.
The magnetic valve 2 includes the first magnetic valve 21, second solenoid valve 22, the 3rd magnetic valve 23, the 4th magnetic valve 24, the
Five magnetic valves 25, the 6th magnetic valve 26, the 7th magnetic valve 27, the 8th magnetic valve 28.
The water circle device 5 includes tank 51 and numerical control pump 52.
First gas collecting apparatus 31 includes the first gas bottle 310, the first liquid level sensor 311, the first pressure transducer
312；Second gas collecting apparatus 32 includes the second gas bottle 320, the second liquid level sensor 321, the second pressure transducer 322.
First liquid level sensor 311 is arranged on the lower section of first gas bottle 310, first pressure transducer
312 are arranged on the top of first gas bottle 310；Second liquid level sensor 321 is arranged on second gas bottle 320
Lower section, second pressure transducer 322 is arranged on the top of second gas bottle 320.
The programmable logic controller 4 respectively with the temperature sensor 11, the numerical control pump 52, first liquid level
Sensor 311, first pressure transducer 312, second liquid level sensor 321, second pressure transducer 322 connect
Connect.
The entrance of first magnetic valve 21 and the entrance of the second solenoid valve 22 pass through Y-type three way type (or T-shaped three
It is logical) solution cucurbitula 12 described in the desorption apparatus 1 is connected, the outlet of first magnetic valve 21 connects first gas collecting apparatus
The air inlet of first gas bottle 310 described in 31, the outlet of the second solenoid valve 22 are connected in second gas collecting apparatus 32
The second gas bottle 320 air inlet；The entrance of 3rd magnetic valve 23 and the entrance of the 4th magnetic valve 24 pass through Y types
Threeway (or T-shaped threeway) connects the numerical control pump 52 in the water circle device 5, and the outlet of the 3rd magnetic valve 23 connects
Connect the water inlet of first gas bottle 310 in first gas collecting apparatus 31, the outlet connection of the 4th magnetic valve 24
The water inlet of the second gas bottle 320 in second gas collecting apparatus 32；The entrance connection described the of 5th magnetic valve 25
The exhaust outlet of first gas bottle 310 in one gas collecting apparatus 31, the outlet of the 5th magnetic valve 25 connect the desorption
Gas collection device 6；The entrance of 6th magnetic valve 26 connects second gas bottle 320 of second gas collecting apparatus 32
Exhaust outlet, the outlet of the 6th magnetic valve 26 connect the stripping gas collection device 6；The entrance of 7th magnetic valve 27 connects
Connect the discharge outlet of first gas bottle 310 in first gas collecting apparatus 31, the outlet connection of the 7th magnetic valve 27
The entrance of the tank 51 in the water circle device 5, the entrance of the 8th magnetic valve 28 connect the second gas collection dress
The discharge outlet of described second gas bottle in 32 is put, the outlet of the 8th magnetic valve 28 connects the institute in the water circle device 5
State the entrance of tank 51.
First gas collecting apparatus 31 and second gas collecting apparatus 32 by the folding of the magnetic valve 2 connect described in enter
Water circle device 5 and the desorption apparatus 1, and then realized between first gas collecting apparatus 31 and second gas collecting apparatus 32
Continuous drainage gas collection.
The programmable logic controller (PLC) 4 receive first liquid level sensor 311, first pressure transducer 312,
Second liquid level sensor 321, second pressure transducer 322, the signal of the temperature sensor 11, remember for data
Record and automatically control；The magnetic valve 2 uses normally closed solenoid valve.
First gas collecting apparatus 31 is identical with the structure of second gas collecting apparatus 32, with first gas collecting apparatus 31
Exemplified by, with reference to figure 2, the top side of first gas collecting apparatus 31 is provided with water inlet 313, air inlet 314 and exhaust outlet 315,
The lower section side of first gas collecting apparatus 31 is provided with discharge outlet 316.
The water inlet 313, the air inlet 314, the exhaust outlet 315, the discharge outlet 316 use G1/4 made in Great Britain
Threaded openings；The water inlet 313 is connected with the outlet of the 3rd magnetic valve 23, the air inlet 314 and the described first electricity
The outlet connection of magnet valve 21, the exhaust outlet 315 are connected with the entrance of the 5th magnetic valve 25, the discharge outlet 316 and institute
State the entrance connection of the 7th magnetic valve 27.
During the 31 draining gas collection of the first gas collecting apparatus, the programmable logic controller (PLC) 4 open the discharge outlet 316,
7th magnetic valve 27, the air inlet 314, first magnetic valve 21 are opened, close the exhaust outlet 315, described
Five magnetic valves 25, close the water inlet 313, the 3rd magnetic valve 23；When the water inlet of first gas collecting apparatus 31 prepares, institute
State programmable logic controller (PLC) 4 and open the exhaust outlet 315, the 5th magnetic valve 25, open the water inlet 313, described
3rd magnetic valve 23, the air inlet 314, first magnetic valve 21 are closed, close the discharge outlet 316, the 7th electricity
Magnet valve 27.
First gas collecting apparatus 31 is identical with the height of second gas collecting apparatus 32, and internal diameter is different；Second collection
The internal diameter of device of air 32 is 2-3 times, preferably 2.5-2.7 times of the internal diameter of the first gas collecting apparatus 31.In the preferred embodiment,
The radius of first gas collecting apparatus 31 is 15mm, and the radius of second gas collecting apparatus 32 is 40mm, the second gas collection dress
Put 32 and the height of first gas collecting apparatus 31 be 280mm.
The inside of first gas collecting apparatus 31 and second gas collecting apparatus 32 is equipped with liquid level sensor and pressure passes
Sensor, wherein, liquid level sensor is arranged on the lower section of gas bottle, takes about 30mm height, and pressure transducer is arranged on gas collection
The top of bottle, about 30mm height is taken, therefore the actual use of first gas bottle 310 and second gas bottle 320 is high
Degree is about 220mm, and first gas bottle 310 integrates air volume as 155mL, and the collection air volume of second gas bottle 320 is
1100mL。
By taking first gas collecting apparatus 31 as an example, the range of first liquid level sensor 311 is 0-3Kpa, using 4-20
Milliampere current output signal, sample rate 200HZ；First liquid level sensor 311 includes up-sampling first 3111 and down-sampling
First 3112, the up-sampling first 3111 measures the pressure of shale gas in real time, and the down-sampling first 3112 measures the pressure of water in real time.
According to the pressure for measuring obtained shale gas and water in real time, the pressure difference of shale gas and water, first liquid are obtained
Level sensor 311 obtains height of water level, and be transferred to described by measuring the pressure difference of shale gas and water during draining gas collection
Programmable logic controller (PLC) 4.The programmable logic controller (PLC) 4 judges first gas bottle 310 or institute by height of water level
State whether the second gas bottle 320 will collect full shale gas.
In one embodiment, when height of water level is 15mm, full shale gas will be collected, and then judge the gas collecting apparatus draining collection
Gas finishes；Meanwhile the programmable logic controller (PLC) 4 calculates the first gas bottle 310 or the second gas bottle 320 by height of water level
The volume of the shale gas of middle collection.
By taking first gas collecting apparatus 31 as an example, the pressure of shale gas in the measuring system of the first pressure transducer 312,
First pressure transducer 312 connects the programmable logic controller (PLC) 4, and the data of measurement are transferred into described may be programmed
Logic controller 4, the programmable logic controller (PLC) 4 correct shale gas according to the measurement of the first pressure sensor 312
Volume, the range of the first pressure sensor 312 is 0-120KPa, and using 4-20 milliampere current output signals, sample rate is
200HZ.Wherein, system refers to the pipeline of desorption apparatus and the gas bottle page upper end and its connection.
In one embodiment, the temperature sensor 11 measures the temperature of shale gas in the desorption apparatus 1, the temperature
Sensor 11 connects the programmable logic controller (PLC) 4, and the data of measurement are transferred into the programmable logic controller (PLC) 4.
The range of the temperature sensor 11 is 0-120 DEG C, using 4-20 milliampere current output signals, sample rate 200HZ.
By taking first gas collecting apparatus 31 as an example, the programmable logic controller (PLC) 4 is to the temperature sensor 11, described
First pressure sensor 312, the data of first liquid level sensor 311 measurement carry out analysis conversion, and then obtain standard shape
The content of shale gas under state.
The pumping rate of the numerical control pump 52 is more than the desorption rate of shale gas, and pumping rate makes at least above 2L/min
Water inlet process rate is faster than draining gas collection process, on the market can automatically controlled water pump mostly size it is bigger than normal and flow is excessive, it is compacted
Dynamic pump can reach the flow of requirement but be unsatisfactory for the demand automatically controlled, and present invention selection 24V DC can automatically control micro-
Type vacuum pump is as water pump.The numerical control pump 52 connects the programmable logic controller (PLC) 4, first gas bottle 310 or
When second gas bottle 320 is intake, the programmable logic controller (PLC) 4 starts the numerical control pump 52, and the numerical control pump 52 is by described in
Water in tank 51 is pumped into, during 310 or second gas bottle of the first gas bottle, the 320 draining gas collection, first gas collecting apparatus
310 or the second water in gas bottle 320 be discharged into the tank 51.
Using high-precision automatic shale air content tester provided by the invention, the present invention provides a kind of high accuracy certainly
Dynamicization shale gassiness weight testing method, as shown in figure 3, mainly including：Desorb preparation, desorption experiment, desorption three steps of end.
Specifically, as shown in figure 4, step S1 desorption prepares to include：
Step S1.1：The 3rd magnetic valve 23, the 5th magnetic valve 25 are opened, is started in the water circle device 5
The numerical control pump 52, the water in the tank 51 is pumped into first gas collecting apparatus 31, filled to first gas collecting apparatus 31
Full water.
Step S1.2:Close the 3rd magnetic valve 23, the 5th magnetic valve 25, open the 4th magnetic valve 24,
6th magnetic valve 26, the water in the tank 51 is pumped into second gas collecting apparatus 32, filled to the second gas collecting apparatus 32
Full water, the numerical control pump 52 is closed, close the 4th magnetic valve 24, the 6th magnetic valve 26.
In one embodiment, when height of water level is 205mm, that is, first gas collecting apparatus 31 or second gas collection are thought
Device 32 is full of water.
As shown in figure 5, step S2 desorption experiment includes：
Step S2.1：First magnetic valve 21 is opened, first gas collecting apparatus 31 connects institute in the desorption apparatus 1
Solution cucurbitula 12 is stated, opens the 7th magnetic valve 27, first gas collecting apparatus starts draining gas collection.
Temperature sensor 11 records the temperature number of shale gas in the desorption apparatus 1 in real time described in the desorption apparatus 1
According to first liquid level sensor 311 records the pressure difference in first gas collecting apparatus 31, first pressure sensing in real time
Pressure difference in first gas collecting apparatus 31 is scaled page by the Microprocessor System for Real Time Record pressure of device 312, the programmable controller 4
The volume of rock gas, V can be designated as1。
Step S2.2：First liquid level sensor 311 measures first gas collection described in first gas collecting apparatus 31
When will be filled with shale gas in device 31, the draining gas collection of the first gas collecting apparatus 31 terminates, and closes first magnetic valve 21, institute
State the 7th magnetic valve 27；Open the second solenoid valve 22, the solution cucurbitula 12 in the desorption apparatus 1 connects described second
Gas collecting apparatus 32, opens the 8th magnetic valve 28, and second gas collecting apparatus 32 starts gas collection draining；Open the 3rd electricity
Magnet valve 23, the 5th magnetic valve 25, start the numerical control pump 52 in the water circle device 5, first gas collecting apparatus
31 start to intake.
In one embodiment, when height of water level is 15mm, that is, first gas collecting apparatus 31 or second gas collection are thought
Device 32 is full of shale gas.
When first gas collecting apparatus 31 is full of water, the 3rd magnetic valve 23, the 5th magnetic valve 25 are closed, is closed
The numerical control pump 52.
The temperature sensor 11 in the desorption apparatus 1 records the temperature of shale gas in the desorption apparatus 1 in real time
Data, second liquid level sensor 321 record the pressure difference in second gas collecting apparatus 32 in real time, and second pressure passes
Pressure difference in second gas collecting apparatus 32 is scaled by the Microprocessor System for Real Time Record pressure of sensor 322, the programmable controller 4
The volume of shale gas, V can be designated as2。
Step S2.3：Second liquid level sensor 321 measures second gas collection described in second gas collecting apparatus 32
When will be filled with shale gas in device 32, the draining gas collection of the second gas collecting apparatus 32 terminates, and closes the second solenoid valve 22, institute
State the 8th magnetic valve 28；While first magnetic valve 21 is opened, the solution cucurbitula 12 in the desorption apparatus 1 connects described
First gas collecting apparatus 31, opens the 7th magnetic valve 27, and first gas collecting apparatus 31 starts gas collection draining；Open described
Four magnetic valves 24, the 6th magnetic valve 26, start the numerical control pump 52 in the water circle device 5, second gas collection
Device 32 starts to intake.
When second gas collecting apparatus 32 is full of water, the 4th magnetic valve 24, the 6th magnetic valve 26 are closed, is closed
The numerical control pump 52.
The temperature sensor 11 in the desorption apparatus 1 records the temperature of shale gas in the desorption apparatus 1 in real time
Data, first liquid level sensor 311 record the pressure difference in first gas collecting apparatus 31 in real time, and first pressure passes
Pressure difference in first gas collecting apparatus 31 is scaled by the Microprocessor System for Real Time Record pressure of sensor 312, the programmable controller 4
The volume of shale gas, V can be designated as3。
Step S2.4：Repeat step S2.2-S2.3 collects to the first gas collecting apparatus or second gas collecting apparatus per hour
Shale gas volume within 5 milliliters.
In the desorption experiment of the step S2, when recording the data of first gas bottle in real time, shale air volume
Calculation formula is：
In formula：VsShale gas measures volume, 1≤s≤n when being measured for the s times；R is the half of first gas bottle
Footpath, h be first gas bottle height, Δ PsFor the pressure in first gas bottle of first liquid level sensor record
Strong poor, ρ is the density of water.
For example, V1And V3Using VsFormula calculated.
When recording the second gas bottle data in real time, the calculation formula of shale air volume is：
In formula：VtShale gas measures volume, 2≤t≤n-1 when being measured for the t times；R is second gas bottle
Radius, H be second gas bottle height, Δ PtIn second gas bottle for second liquid level sensor record
Pressure difference, ρ are the density of water.
For example, V2Using VtFormula calculated.
Step S3：Desorption terminates：
The condition that the shale gas desorption terminates is first condition, one kind in second condition, third condition, the desorption
End includes：
Step S3.1：In desorption experiment continuous gas collection with the flow chart at the end of the first condition as shown in fig. 6, now
Desorption terminate to include：The solution cucurbitula 12 in the desorption apparatus 1 connects second gas collecting apparatus 32, closes described the
Two magnetic valves 22, the 8th magnetic valve 28, open first magnetic valve 21, and the desorption apparatus 1 connects first collection
Device of air 31, opens the 7th magnetic valve 27, and first gas collecting apparatus 31 starts gas collection draining to shale gas desorption and terminated.
In one embodiment, the volume for the shale gas that first gas collecting apparatus is collected per hour is within 0.2 milliliter, then
Shale gas desorption terminates.
The temperature sensor 11 in the desorption apparatus 1 records the temperature of the shale gas in the desorption apparatus 1 in real time
Degrees of data, second liquid level sensor 321 records in second gas collecting apparatus 32 in real time described in second gas collecting apparatus 32
Pressure difference, the Microprocessor System for Real Time Record pressure of the second pressure transducer 322, the programmable logic controller (PLC) 4 is by described
Pressure difference in two gas collecting apparatus 32 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as
Vn-1。
The temperature sensor 11 in the desorption apparatus 1 records the temperature of the shale gas in the desorption apparatus 1 in real time
Degrees of data, first liquid level sensor 311 records in first gas collecting apparatus 31 in real time described in first gas collecting apparatus 31
Pressure difference, the Microprocessor System for Real Time Record pressure of the first pressure transducer 312, the programmable logic controller (PLC) 4 is by described
Pressure difference in one gas collecting apparatus 31 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn。
After the programmable logic controller (PLC) carries out DATA REASONING since for the first time to shale air volume, to pendulous frequency
Added up.
At the end of the desorption experiment is with the first condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
In formula：V is the volume of shale gas in the stripping gas collection device, and a is the volume of first gas bottle, and b is
The volume of second gas bottle, n are the total degree of draining gas collection.
It should be noted that VsFor instantaneous stripping gas volume, V in the first gas bottletFor instantaneous stripping gas in the second gas bottle
Volume, when the first gas bottle draining gas collection finishes, the stripping gas volume of the first gas bottle is the volume a of the first gas bottle, when
When second gas bottle draining gas collection finishes, the stripping gas volume of the second gas bottle is the volume b of the second gas bottle.Total gas desorption quantity
V is the gas desorption quantity V for the gas bottle for being in gas collection hull-borne at current timen-1、Vn(i.e. Vt、Vs) add before accumulative gas
Amount.
The volume calculation formula of shale gas is under standard state：
In formula：P is the system pressure recorded in real time；T is the temperature recorded in real time.Step S3.2：It is continuous in desorption experiment
Gas collection is with the flow chart at the end of the second condition as shown in fig. 7, desorption now terminates to include：The desorption apparatus 1 connects
Lead to first gas collecting apparatus 31, and the height of the reclaimed water of the first gas collecting apparatus 31 is more than the height of the first gas bottle 310
Half when, first gas bottle 310 continues draining gas collection until shale gas desorption terminates.
In one embodiment, when the height of the reclaimed water of the first gas collecting apparatus 31 is more than 100mm, draining gas collection is continued to page
The desorption of rock gas terminates.
In one embodiment, the volume for the shale gas that first gas collecting apparatus is collected per hour is within 0.2 milliliter, then
Shale gas desorption terminates.
The temperature sensor 11 in the desorption apparatus 1 records the temperature of the shale gas in the desorption apparatus 1 in real time
Degrees of data, first liquid level sensor 311 records in first gas collecting apparatus 31 in real time described in first gas collecting apparatus 31
Pressure difference, the Microprocessor System for Real Time Record pressure of the first pressure transducer 312, the programmable logic controller (PLC) 4 is by described
Pressure difference in one gas collecting apparatus 31 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn。
After the programmable logic controller (PLC) carries out DATA REASONING since for the first time to shale air volume, to pendulous frequency
Added up.
At the end of the desorption experiment is with the second condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
In formula：V is the volume of shale gas in the stripping gas collection device, and a is the volume of first gas bottle, and b is
The volume of second gas bottle, n are the total degree of draining gas collection.
It should be noted that VsFor instantaneous stripping gas volume, V in the first gas bottletFor instantaneous stripping gas in the second gas bottle
Volume, when the first gas bottle draining gas collection finishes, the stripping gas volume of the first gas bottle is the volume a of the first gas bottle, when
When second gas bottle draining gas collection finishes, the stripping gas volume of the second gas bottle is the volume b of the second gas bottle.Total gas desorption quantity
V is the gas desorption quantity V for the gas bottle for being in gas collection hull-borne at current timen(i.e. Vs) add before device gas.
The volume calculation formula of shale gas is under standard state：
In formula：P is the system pressure recorded in real time；T is the temperature recorded in real time.
Step S3.3：In desorption experiment continuous gas collection with the flow chart at the end of the third condition as shown in figure 8, now
Desorption terminate to include：The desorption apparatus 1 connects first gas collecting apparatus 31, and the reclaimed water of the first gas collecting apparatus 31
(in one embodiment, the height of the reclaimed water of the first gas collecting apparatus 31 when being highly less than the half of the height of the first gas bottle 310
When degree is less than 100mm), first magnetic valve 21, the 7th magnetic valve 27 are closed, opens the second solenoid valve 22, institute
State and cucurbitula 12 is solved described in desorption apparatus 1 connect second gas collecting apparatus 32, open the 8th magnetic valve 28, described second
Gas collecting apparatus 32 starts gas collection draining.
Temperature sensor 11 records the temperature of the shale gas in the desorption apparatus 1 in real time described in the desorption apparatus 1
Data, first liquid level sensor 311 records in first gas collecting apparatus 31 in real time described in first gas collecting apparatus 31
Pressure difference, the Microprocessor System for Real Time Record pressure of the first pressure transducer 312, the programmable logic controller (PLC) 4 is by described first
Pressure difference in gas collecting apparatus 31 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn-2；
Temperature sensor 11 records the temperature of the shale gas in the desorption apparatus 1 in real time described in the desorption apparatus 1
Data, second liquid level sensor 312 records in second gas collecting apparatus 32 in real time described in second gas collecting apparatus 32
Pressure difference, the Microprocessor System for Real Time Record pressure of the second pressure transducer 322, the programmable logic controller (PLC) 4 is by described second
Pressure difference in gas collecting apparatus 32 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn-1。
The 3rd magnetic valve 23, the 5th magnetic valve 25 are opened, starts the numerical control in the water circle device 5
Pump 52, first gas collecting apparatus 31 start water inlet to when being full of water, close the numerical control pump 52, close the second solenoid valve
22nd, the 8th magnetic valve 28, first magnetic valve 21 is opened, the desorption apparatus 1 connects first gas collecting apparatus 31,
The 7th magnetic valve 27 is opened, first gas collecting apparatus 31 starts gas collection draining to shale gas desorption and terminated.
Temperature sensor 11 records the temperature of the shale gas in the desorption apparatus 1 in real time described in the desorption apparatus 1
Data, first liquid level sensor 311 records in first gas collecting apparatus 31 in real time described in first gas collecting apparatus 31
Pressure difference, the Microprocessor System for Real Time Record pressure of the first pressure transducer 312, the programmable logic controller (PLC) 4 is by described first
Pressure difference in gas collecting apparatus 31 is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn。
After the programmable logic controller (PLC) carries out DATA REASONING since for the first time to shale air volume, to pendulous frequency
Added up.
At the end of the desorption experiment is with the third condition, the volume of shale gas calculates in the stripping gas collection device
Formula is：
In formula：V is the volume of shale gas in the stripping gas collection device, and a is the volume of first gas bottle, and b is
The volume of second gas bottle, n are the total degree of draining gas collection.
It should be noted that VsFor instantaneous stripping gas volume, V in the first gas bottletFor instantaneous stripping gas in the second gas bottle
Volume, when the first gas bottle draining gas collection finishes, the stripping gas volume of the first gas bottle is the volume a of the first gas bottle, when
When second gas bottle draining gas collection finishes, the stripping gas volume of the second gas bottle is the volume b of the second gas bottle.Total gas desorption quantity
V is the gas desorption quantity V for the gas bottle for being in gas collection hull-borne at current timen-2、Vn-1、Vn(i.e. Vs、Vt、Vs) add before
Device gas.
The volume calculation formula of shale gas is under standard state：
In formula：P is the system pressure recorded in real time；T is the temperature recorded in real time.
Obtain the air content of shale gas above.
The present invention requires (such as terminate limit in 0.2ml per hour) to precision, required precision and gas bottle sectional area into
Inverse ratio, therefore the present invention sets the first gas bottle and the second gas bottle, and the internal diameter of second gas bottle is first collection
2-3 times of gas cylinder internal diameter.That is, by second gas bottle gas bottle the biggest, using first gas bottle as small gas bottle.
Because outlet speed at initial stage is fast, to meet Quick drainage requirement, although the precision of big gas bottle does not reach termination limit
Precision, but its precision can meet enter termination phase before required precision.The resolution ratio of small gas bottle is terminate limit 10 times,
Desorption ending phase terminates in small gas bottle.To sum up, big gas bottle can effectively meet the fireballing situation of outlet at initial stage, small collection
Precision problem when gas cylinder can effectively meet to terminate.
The present invention innovatively applies to the measuring principle of pressure differential method in the design of shale gassiness tester, utilizes liquid
Level sensor, by measuring the pressure of liquid level above and below gas collecting apparatus, calculates pressure differential, and water level height is converted into by pressure differential
Degree, so as to calculate the volume of stripping gas, shale desorption Gas content is obtained, improves the degree of accuracy of measurement result；Based on continuously
The guiding theory of the continuous measurement of disconnection, devises the pattern of the reciprocal alternation of double gas collecting apparatus, ensure that the continuous of measurement process
Property, improve the automaticity for measuring work；Based on instrument miniaturization and portable design requirement, by the use of gas bottle as
Gas collecting apparatus, and on the premise of given volume, using sectional area and the principle being highly inversely proportional, two gas bottles are designed to
Slender type, and it is highly identical, internal diameter is different, both meets to collect requirement of the tolerance to volume, avoids gas collection process cycle-index excessive,
Meet sensitivity requirement as defined in current shale gas examination criteria again；Devise and automatically control dress by control unit of magnetic valve
Put, and it is connected with double gas collecting apparatus, " seamless " switching between double gas collecting apparatus, test process measurement number can be completed
According to continuous uninterrupted；Double gas collecting apparatus water levels and stream are automatically controlled by controller, by magnetic valve, numerical control pump and biography
Sensor organically combines, and automatically switch stream after height of water level reaches preset value, make water in double gas collecting apparatus toward complex Alternating without
Discontinuous empties and supplement, avoids manual intervention process, realizes detection process automatic measurement, substantially increase instrument
Testing efficiency and precision, while the integrality of detection process stripping gas data is ensure that, established to lose the accurate fitting of tolerance
Basis；Full-automatic shale air content tester is stable and reliable for performance, reaches design requirement, has degree of accuracy height, reappearance
Well, the advantages of automaticity is high, has a good application prospect.
In the case where not conflicting, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
A kind of high-precision automatic shale air content tester provided in an embodiment of the present invention and method of testing are at least wrapped
Include following technique effect：
In the embodiment of the present application, the pattern of the reciprocal alternation of twin containers is devised, ensure that the company of measurement process
Continuous property simultaneously, improves the automaticity of measurement work；Devise the switching device using magnetic valve as control unit, and by its
It is connected with double gas collecting apparatus, " seamless " switching between double gas collecting apparatus can be completed, test process measurement data is continuous not
Interruption；Double gas collecting apparatus water levels and stream are automatically controlled by programmable logic controller (PLC), made in double gas collecting apparatus
Water avoids manual intervention process, realizes detection process automatic measurement, significantly toward complex Alternating formula emptying free of discontinuities and supplement
The testing efficiency and precision of instrument are improved, while ensure that the integrality of detection process stripping gas data, for loss tolerance
Accurate fitting is laid a good foundation.High-precision automatic shale air content tester provided by the invention is stable and reliable for performance, tool
There is the advantages of degree of accuracy height, favorable reproducibility, high automaticity.
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (10)
- A kind of 1. high-precision automatic shale air content tester, it is characterised in that including：Desorption apparatus, water circle device, First gas collecting apparatus, the second gas collecting apparatus, magnetic valve, stripping gas collection device, programmable logic controller；First gas collecting apparatus and second gas collecting apparatus pass through the magnetic valve and the water circle device, the solution Inhale device, stripping gas collection device connection；The programmable logic controller respectively with first gas collecting apparatus, second gas collecting apparatus, the desorption apparatus, The water circle device connection；The programmable logic controller (PLC) is connected with the magnetic valve, and controls the folding of the magnetic valve.
- 2. high-precision automatic shale air content tester according to claim 1, it is characterised in that the magnetic valve Including the first magnetic valve, second solenoid valve, the 3rd magnetic valve, the 4th magnetic valve, the 5th magnetic valve, the 6th magnetic valve, the 7th electricity Magnet valve, the 8th magnetic valve；The entrance of first magnetic valve, the entrance of the second solenoid valve are connected with the desorption apparatus respectively；Described first The outlet of magnetic valve connects the air inlet of first gas collecting apparatus, and the outlet of the second solenoid valve connects second gas collection The air inlet of device；Entrance, the entrance of the 4th magnetic valve of 3rd magnetic valve are connected with the water circle device respectively；Described The outlet of three magnetic valves connects the water inlet of first gas collecting apparatus, outlet connection second collection of the 4th magnetic valve The water inlet of device of air；The entrance of 5th magnetic valve connects the exhaust outlet of first gas collecting apparatus, the entrance connection of the 6th magnetic valve The exhaust outlet of second gas collecting apparatus；The exporting of 5th magnetic valve, the outlet of the 6th magnetic valve respectively with it is described Stripping gas collection device connects；The entrance of 7th magnetic valve connects the discharge outlet of first gas collecting apparatus, the entrance connection of the 8th magnetic valve The discharge outlet of second gas collecting apparatus；The exporting of 7th magnetic valve, the outlet of the 8th magnetic valve respectively with it is described Water circle device connects.
- 3. high-precision automatic shale air content tester according to claim 1, it is characterised in that the desorption dress Put including solution cucurbitula and temperature sensor；The water circle device includes tank and numerical control pump；First gas collecting apparatus includes the first gas bottle, the first liquid level sensor, the first pressure transducer；Second gas collection Device includes the second gas bottle, the second liquid level sensor, the second pressure transducer；First liquid level sensor is arranged on the lower section of first gas bottle, and first pressure transducer is arranged on described The top of first gas bottle；Second liquid level sensor is arranged on the lower section of second gas bottle, and second pressure passes Sensor is arranged on the top of second gas bottle；The programmable logic controller respectively with the temperature sensor, the numerical control pump, first liquid level sensor, institute State the first pressure transducer, second liquid level sensor, second pressure transducer connection.
- 4. high-precision automatic shale air content tester according to claim 3, it is characterised in that first collection Gas cylinder has the first height and the first internal diameter, and second gas bottle has the second height and the second internal diameter；First height Highly identical with described second, second internal diameter is 2-3 times of first internal diameter.
- 5. high-precision automatic shale air content tester according to claim 3, it is characterised in that first collection The top side of gas cylinder and second gas bottle is provided with water inlet, air inlet, exhaust outlet, first gas bottle and described The lower section side of two gas bottles is provided with discharge outlet.
- 6. a kind of high-precision automatic shale gassiness weight testing method, it is characterised in that comprise the following steps：Step S1：Desorption prepares；The desorption preparation includes：Magnetic valve is controlled, the water in water circle device is pumped into the first gas collecting apparatus, to described first Gas collecting apparatus is full of water；Magnetic valve is controlled, the water in water circle device is pumped into the second gas collecting apparatus, is filled to second gas collection Put and be full of water；Step S2：Desorption experiment；The desorption experiment includes：By programmable logic controller to first gas collecting apparatus and second gas collecting apparatus Water level and stream automatically controlled, make water in first gas collecting apparatus and second gas collecting apparatus toward complex Alternating without Discontinuously empty and supplement；Obtain and record first gas collecting apparatus and the volume of shale gas that second gas collecting apparatus is collected respectively；Step S3：Desorption terminates；The desorption end includes：Repeat step S2, until what first gas collecting apparatus or second gas collecting apparatus were collected The volume of shale gas is less than the volume for entering desorption ending phase set；When first gas collecting apparatus reaches the condition that shale gas desorption terminates, pass through the accumulative meter of the programmable logic controller Calculate and record the volume of shale gas in stripping gas collection device.
- 7. high-precision automatic shale gassiness weight testing method according to claim 6, it is characterised in that the desorption is accurate It is standby to include：Step S1.1：The 3rd magnetic valve, the 5th magnetic valve are opened, starts the numerical control pump in the water circle device, by the water Water in EGR in tank is pumped into the first gas bottle in first gas collecting apparatus, is full of to first gas bottle Water；Step S1.2：The 3rd magnetic valve, the 5th magnetic valve are closed, the 4th magnetic valve, the 6th magnetic valve are opened, by institute The second gas bottle that the water in tank is pumped into second gas collecting apparatus is stated, water is full of to second gas bottle, closes institute Numerical control pump is stated, closes the 4th magnetic valve, the 6th magnetic valve；The desorption experiment includes：Step S2.1：Open the first magnetic valve, first gas bottle connects desorption apparatus, opens the 7th magnetic valve, and described the One gas bottle starts draining gas collection；Temperature sensor in the desorption apparatus records the temperature of the desorption apparatus in real time, in first gas collecting apparatus First liquid level sensor records the pressure difference in first gas bottle in real time, and the first pressure in first gas collecting apparatus passes Pressure difference in first gas bottle is scaled shale by sensor Microprocessor System for Real Time Record pressure, the programmable logic controller The volume of gas, and record the volume of this caused shale gas；Step S2.2：First liquid level sensor detects when shale gas is full of in first gas bottle, first collection The draining gas collection of gas cylinder terminates, and closes first magnetic valve, the 7th magnetic valve, opens second solenoid valve, the desorption Device connects second gas bottle, opens the 8th magnetic valve, and second gas bottle starts draining gas collection；The 3rd magnetic valve, the 5th magnetic valve are opened, starts the numerical control pump, first gas bottle starts to intake； When first gas bottle is full of water, the 3rd magnetic valve, the 5th magnetic valve are closed, closes the numerical control pump；The temperature sensor records the temperature of the desorption apparatus in real time, the second level sensing in second gas collecting apparatus Device records the pressure difference in second gas bottle in real time, and the second pressure transducer in second gas collecting apparatus records in real time Pressure difference in second gas bottle is scaled the volume of shale gas by system pressure, the programmable logic controller, and Record the volume of this caused shale gas；Step S2.3：Second liquid level sensor measures when shale gas is full of in second gas bottle, second collection Gas cylinder draining gas collection terminates, and closes the second solenoid valve, the 8th magnetic valve, opens first magnetic valve, the solution Inhale device and connect first gas bottle, open the 7th magnetic valve, first gas bottle starts draining gas collection；The 4th magnetic valve, the 6th magnetic valve are opened, starts the numerical control pump, second gas bottle starts to intake； When second gas bottle is full of water, the 4th magnetic valve, the 6th magnetic valve are closed, closes the numerical control pump；The temperature sensor records the temperature of desorption apparatus in real time, and first liquid level sensor records the first gas bottle in real time In pressure difference, the first pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller is by described first Pressure difference in gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas；Step S2.4：Repeat step S2.2- step S2.3, until first gas bottle or second gas bottle are received per hour The volume of the shale gas of collection is within 5 milliliters；The condition that the shale gas desorption terminates is first condition, one kind in second condition, third condition, and the desorption terminates Including：Step S3.1：The desorption experiment is terminated with the first condition, i.e., described desorption apparatus connects second gas bottle When, close the second solenoid valve, the 8th magnetic valve, open first magnetic valve, described in the desorption apparatus connection First gas bottle, the 7th magnetic valve is opened, first gas bottle starts draining gas collection until shale gas desorption terminates；The temperature sensor records the temperature of the desorption apparatus in real time, and second liquid level sensor records described in real time Pressure difference in two gas bottles, the second pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller (PLC) will Pressure difference in second gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn-1；The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records described in real time Pressure difference in one gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller will Pressure difference in first gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn；Wherein, n is the total degree of draining gas collection；Step S3.2：The desorption experiment is terminated with the second condition, i.e., described desorption apparatus connects first gas bottle, And the height of the first gas bottle reclaimed water be more than the first gas bottle height half when, first gas bottle continues to arrange Water gas collection is until shale gas desorption terminates；The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records described in real time Pressure difference in one gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller will Pressure difference in first gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn；Wherein, n is the total degree of draining gas collection；Step S3.3：The desorption experiment is terminated with the third condition, i.e., described desorption apparatus connects first gas bottle, And the height of the first gas bottle reclaimed water is when being less than the half of the first gas bottle height, close first magnetic valve, 7th magnetic valve, the second solenoid valve is opened, the desorption apparatus connects second gas bottle, opens the described 8th Magnetic valve, second gas bottle start draining gas collection；The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records described in real time Pressure difference in one gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller (PLC) will Pressure difference in first gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn-2；The temperature sensor records the temperature of the desorption apparatus in real time, and second liquid level sensor records described in real time Pressure difference in two gas bottles, the second pressure transducer Microprocessor System for Real Time Record pressure, the programmable logic controller (PLC) will Pressure difference in second gas bottle is scaled the volume of shale gas, and records the volume of this caused shale gas, is designated as Vn-1；The 3rd magnetic valve, the 5th magnetic valve to be opened, starts the numerical control pump, first gas bottle starts to intake, When first gas bottle is full of water, the numerical control pump is closed, closes the second solenoid valve, the 8th magnetic valve, is opened First magnetic valve, the desorption apparatus connect first gas bottle, open the 7th magnetic valve, first gas collection Bottle starts draining gas collection to shale gas desorption and terminated；The temperature sensor records the temperature of the desorption apparatus in real time, and first liquid level sensor records described in real time Pressure difference in one gas bottle, the first pressure transducer Microprocessor System for Real Time Record pressure, terminates to desorption experiment, described to compile Collect logic controller and the pressure difference in first gas bottle is scaled the volume of shale gas, and record this caused shale The volume of gas, is designated as Vn；Wherein, n is the total degree of draining gas collection.
- 8. high-precision automatic shale gassiness weight testing method according to claim 7, it is characterised in that the shale gas The volume for the shale gas that the condition that desorption terminates is collected per hour for first gas bottle is within 0.2 milliliter.
- 9. high-precision automatic shale gassiness weight testing method according to claim 7, it is characterised in that the desorption is real When recording the data of first gas bottle in testing in real time, the calculation formula of shale air volume is：<mrow> <msub> <mi>V</mi> <mi>s</mi> </msub> <mo>=</mo> <msup> <mi>&pi;r</mi> <mn>2</mn> </msup> <mrow> <mo>(</mo> <mi>h</mi> <mo>-</mo> <mfrac> <mrow> <msub> <mi>&Delta;P</mi> <mi>s</mi> </msub> </mrow> <mrow> <mi>&rho;</mi> <mi>g</mi> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>In formula：VsShale gas measures volume, 1≤s≤n when being measured for the s times；R is the radius of first gas bottle, and h is The height of first gas bottle, Δ PsFor the pressure difference in first gas bottle of first liquid level sensor record, ρ For the density of water；When recording the second gas bottle data in the desorption experiment in real time, the calculation formula of shale air volume is：<mrow> <msub> <mi>V</mi> <mi>t</mi> </msub> <mo>=</mo> <msup> <mi>&pi;R</mi> <mn>2</mn> </msup> <mrow> <mo>(</mo> <mi>H</mi> <mo>-</mo> <mfrac> <mrow> <msub> <mi>&Delta;P</mi> <mi>t</mi> </msub> </mrow> <mrow> <mi>&rho;</mi> <mi>g</mi> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>In formula：VtShale gas measures volume, 2≤t≤n-1 when being measured for the t times；R be second gas bottle radius, H For the height of second gas bottle, Δ PtFor the pressure in second gas bottle of second liquid level sensor record Difference, ρ are the density of water.
- 10. high-precision automatic shale gassiness weight testing method according to claim 9, it is characterised in that described to compile After journey logic controller carries out DATA REASONING since for the first time to shale air volume, pendulous frequency is added up；At the end of the desorption experiment is with the first condition, the volume calculation formula of shale gas in the stripping gas collection device For：<mrow> <mi>V</mi> <mo>=</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> <mn>2</mn> </mfrac> <mi>a</mi> <mo>+</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>3</mn> </mrow> <mn>2</mn> </mfrac> <mi>b</mi> <mo>+</mo> <msub> <mi>V</mi> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>V</mi> <mi>n</mi> </msub> </mrow>At the end of the desorption experiment is with the second condition, the volume calculation formula of shale gas in the stripping gas collection device For：<mrow> <mi>V</mi> <mo>=</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> <mn>2</mn> </mfrac> <mi>a</mi> <mo>+</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> <mn>2</mn> </mfrac> <mi>b</mi> <mo>+</mo> <msub> <mi>V</mi> <mi>n</mi> </msub> </mrow>At the end of the desorption experiment is with the third condition, the volume calculation formula of shale gas in the stripping gas collection device For：<mrow> <mi>V</mi> <mo>=</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>3</mn> </mrow> <mn>2</mn> </mfrac> <mi>a</mi> <mo>+</mo> <mfrac> <mrow> <mi>n</mi> <mo>-</mo> <mn>3</mn> </mrow> <mn>2</mn> </mfrac> <mi>b</mi> <mo>+</mo> <msub> <mi>V</mi> <mrow> <mi>n</mi> <mo>-</mo> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>V</mi> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>V</mi> <mi>n</mi> </msub> </mrow>In formula：V is the volume of shale gas in the stripping gas collection device, and a is the volume of first gas bottle, and b is described The volume of second gas bottle, n are the total degree of draining gas collection；The volume calculation formula of shale gas is under standard state：<mrow> <msub> <mi>V</mi> <mrow> <mi>S</mi> <mi>T</mi> <mi>P</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mn>293.15</mn> <mo>&times;</mo> <mi>P</mi> <mo>&times;</mo> <mi>V</mi> </mrow> <mrow> <mn>101.33</mn> <mo>&times;</mo> <mrow> <mo>(</mo> <mn>273.15</mn> <mo>+</mo> <mi>T</mi> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>In formula：P is the system pressure recorded in real time；T is the temperature recorded in real time.
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| US20100150658A1 (en) * | 2008-03-24 | 2010-06-17 | Lcg Thermalpro International Inc. | System and method for treating oil-bearing media |
| US20160023255A1 (en) * | 2012-03-13 | 2016-01-28 | Reterro | Feedback loop control for soil evaporative desorption |
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