CN107449641A - A kind of continuous apparatus and method for collecting shale stripping gas free of discontinuities - Google Patents
A kind of continuous apparatus and method for collecting shale stripping gas free of discontinuities Download PDFInfo
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- CN107449641A CN107449641A CN201710836119.6A CN201710836119A CN107449641A CN 107449641 A CN107449641 A CN 107449641A CN 201710836119 A CN201710836119 A CN 201710836119A CN 107449641 A CN107449641 A CN 107449641A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 125
- 238000003795 desorption Methods 0.000 claims abstract description 58
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 6
- 238000011437 continuous method Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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- Health & Medical Sciences (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of continuous device for collecting shale stripping gas free of discontinuities, including two gas collecting apparatus and a valve position switching device, two gas collecting apparatus are respectively the first gas collecting apparatus and the second gas collecting apparatus, first gas collecting apparatus and the second gas collecting apparatus are all connected with valve position switching device, valve position switching device connection water feed apparatus and shale desorption apparatus, first gas collecting apparatus and the second gas collecting apparatus switch alternate communication water feed apparatus and shale desorption apparatus by the valve position of valve position switching device, first gas collecting apparatus connects shale desorption apparatus draining gas collection, the connection water feed apparatus water inlet of second gas collecting apparatus, when the shale gas collected in first gas collecting apparatus will be filled with the first gas collecting apparatus, valve position switching device carries out valve position switching, second gas collecting apparatus connects shale desorption apparatus draining gas collection, the connection water feed apparatus water inlet of first gas collecting apparatus.The present invention is devised the pattern of the reciprocal alternation of double gas collecting apparatus, ensure that the continuity of measurement process based on the guiding theory free of discontinuities continuously measured.
Description
Technical field
The present invention relates to shale reservoir field, more particularly to a kind of continuous device for collecting shale stripping gas free of discontinuities and side
Method.
Background technology
Shale gas is that one kind is present in shale, is born from the unconventional gas resource of storage certainly.Whether evaluation shale has
Reserves are industrialized, air content is a very important parameter.Effectively to evaluate whether somewhere has industrialized prospect,
Accurate air content evaluating data is must be set up, these air content data are used for evaluating reservoir, resource assessment and production forecast.Cause
This, it will be appreciated that shale air content, it is necessary to accurately test air content, there is provided it is a kind of can be by the method for accurate measurement shale air content
And appliance arrangement.
At present, continuous unremitting collection can not be accomplished during collection for shale gas, interruption is damaged during collecting
The shale gas of mistake can not usually calculate, and then lead to not the content of Accurate Prediction shale gas.
The content of the invention
In view of this, the embodiment provides a kind of continuous collection free of discontinuities of energy Accurate Prediction shale Gas content
The apparatus and method of shale stripping gas.
Embodiments of the invention provide a kind of continuous device for collecting shale stripping gas free of discontinuities, including two gas collecting apparatus and
One valve position switching device, two gas collecting apparatus are respectively the first gas collecting apparatus and the second gas collecting apparatus, first gas collecting apparatus and
Second gas collecting apparatus is all connected with valve position switching device, valve position switching device connection water feed apparatus and shale desorption apparatus, institute
State the first gas collecting apparatus and the second gas collecting apparatus and alternate communication water feed apparatus and shale are switched by the valve position of valve position switching device
Desorption apparatus, first gas collecting apparatus connect shale desorption apparatus draining gas collection, the second gas collecting apparatus connection water inlet dress
Put into water, when the shale gas collected in first gas collecting apparatus will be filled with the first gas collecting apparatus, valve position switching device is entered
Row valve position switches, and second gas collecting apparatus connects shale desorption apparatus draining gas collection, the first gas collecting apparatus connection water inlet
Device is intake, and first gas collecting apparatus and the second gas collecting apparatus replace continuous drainage gas collection to shale gas desorption and terminated.
Further, differential pressure pickup, the pressure difference sensing are equipped with first gas collecting apparatus and the second gas collecting apparatus
Device connects controller, the valve position switching of controller control valve position switching device, and the differential pressure pickup measures gas collection in real time
The shale gas collected in device, when the differential pressure pickup, which measures, will be filled with shale gas in gas collecting apparatus, the pressure difference passes
Information is transmitted to controller by sensor, and controller control valve position switching device carries out valve position switching.
Further, the differential pressure pickup includes up-sampling head and down-sampling head, the up-sampling head of the differential pressure pickup
The pressure of shale gas in gas collecting apparatus is measured in real time, and the down-sampling head of the differential pressure pickup measures gas collecting apparatus reclaimed water in real time
Pressure, the height of gas collecting apparatus reclaimed water is obtained by the pressure difference of shale gas and water, the height of the gas collecting apparatus reclaimed water is small
When 15mm, controller control valve position switching device carries out valve position switching.
Further, the top side of the gas collecting apparatus is provided with into water/gas port and exhaust outlet, the lower section of the gas collecting apparatus
Side is provided with discharge outlet, and the exhaust outlet and discharge outlet are opened and closed by solenoid valve control, the magnetic valve connection control
Device, the folding of the controller control magnetic valve, when the gas collecting apparatus is by water inlet/gas port draining gas collection, the controller
The magnetic valve of discharge outlet is opened, when the gas collecting apparatus is intake by water inlet/gas port, the controller opens the electromagnetism of exhaust outlet
Valve.
Further, the water feed apparatus includes water pump and tank, and when the gas collecting apparatus is intake, the water pump is by tank
Water be pumped into gas collecting apparatus, during the gas collecting apparatus draining gas collection, the water in the gas collecting apparatus is discharged into tank.
Further, valve position switching device is ten-way valve, and the ten-way valve includes ten valve ports and five valves, ten
Valve port is respectively No.1 mouth, No. two mouths, No. three mouths, No. four mouths, No. five mouths, No. six mouths, No. seven mouths, No. eight mouths, No. nine mouths and ten
Number mouth, five valves are respectively the first valve, the second valve, the 3rd valve, the 4th valve and the 5th valve, the No.1 mouth connection shale desorption
Device, No. three mouths and No. nine mouth connection water pumps, No. four mouths, No. six mouths and No. eight mouth connection tanks, second collection
The water/gas of entering of device of air connects No. ten mouths, and the discharge outlet of the second gas collecting apparatus connects No. seven mouths, and first gas collecting apparatus enters
Water/gas connects No. two mouths, and the discharge outlet of the first gas collecting apparatus connects No. five mouths；During the first gas collecting apparatus draining gas collection, institute
State the first valve No. three mouths and No. four mouths are connected to No.1 mouth and No. two mouth connections, second valve, the 3rd valve is by No. five
Mouth connects with No. six mouths, and the 4th valve connects No. seven mouths and No. eight mouths, and the 5th valve connects No. nine mouths and No. ten mouths,
During the second gas collecting apparatus draining gas collection, ten-way valve is rotated, makes first valve by No.1 mouth and the connection of No. ten mouths, described the
Two valves connect No. five mouths and No. four mouths No. three mouths and the connection of No. two mouths, the 3rd valve, the 4th valve by No. seven mouths and
No. six mouth connections, the 5th valve connect No. nine mouths and No. eight mouths.
Further, the pumping rate of the water pump is more than the desorption rate of shale gas.
Further, first gas collecting apparatus and the second gas collecting apparatus are two small one and large one gas bottles, described second
Gas collecting apparatus is big gas bottle, and first gas collecting apparatus is the height phase of small gas bottle, the big gas bottle and small gas bottle
Together, internal diameter is different, and the internal diameter of the big gas bottle is 2.5-2.7 times of small gas bottle internal diameter.
A kind of continuous method for collecting shale stripping gas free of discontinuities, comprises the following steps：
S1. valve position switching device connection water feed apparatus, the water feed apparatus connect the first gas collection by valve position switching device
Device, the exhaust outlet magnetic valve of the first gas collecting apparatus is opened, start water pump, the water in tank is pumped into the first gas collecting apparatus to the
One gas collecting apparatus is full of water；
S2. the exhaust outlet magnetic valve of the first gas collecting apparatus is closed, switches the valve position of valve position switching device, the water inlet
Device connects the second gas collecting apparatus by valve position switching device, the exhaust outlet magnetic valve of the second gas collecting apparatus is opened, by tank
Water be pumped into the second gas collecting apparatus to the second gas collecting apparatus and be full of water, switch off the pump；
S3. valve position switching device connection shale desorption apparatus, the discharge outlet magnetic valve of the first gas collecting apparatus, the first collection are opened
Device of air starts draining gas collection；
S4. differential pressure pickup measures the shale gas collected in the first gas collecting apparatus in real time, when the differential pressure pickup measures
When will be filled with shale gas into the first gas collecting apparatus, controller control valve position switching device carries out valve position switching, meanwhile, beat
The discharge outlet magnetic valve of the second gas collecting apparatus is driven, closes the discharge outlet magnetic valve of the first gas collecting apparatus, opens the first gas collecting apparatus
Exhaust outlet magnetic valve, start water pump, the second gas collecting apparatus starts draining gas collection, and the first gas collecting apparatus starts to intake；
S5. when the first gas collecting apparatus is full of water, the exhaust outlet magnetic valve of the first gas collecting apparatus is closed, is switched off the pump；
S6. differential pressure pickup measures the shale gas collected in the second gas collecting apparatus in real time, when the differential pressure pickup measures
When will be filled with shale gas into the second gas collecting apparatus, controller control valve position switching device carries out valve position switching, meanwhile, beat
The discharge outlet magnetic valve of the first gas collecting apparatus is driven, closes the discharge outlet magnetic valve of the second gas collecting apparatus, opens the second gas collecting apparatus
Exhaust outlet magnetic valve, start water pump, the first gas collecting apparatus starts draining gas collection, and the second gas collecting apparatus starts to intake；
S7. when the second gas collecting apparatus is full of water, the exhaust outlet magnetic valve of the second gas collecting apparatus is closed, is switched off the pump；
S8. repeat step S4-S7, until the volume for the shale gas collected per hour is within 5 milliliters；
If S9. shale desorption apparatus connects the second gas collecting apparatus, controller control valve position switching device carries out valve position switching,
Shale desorption apparatus, which connects the first gas collecting apparatus to shale gas desorption, to be terminated；If shale desorption apparatus connects the first gas collecting apparatus,
And first height of gas collecting apparatus reclaimed water when being more than the first gas collecting apparatus and using the half of height, continue draining gas collection to shale gas
Desorption terminates；If shale desorption apparatus connects the first gas collecting apparatus, and the height of the first gas collecting apparatus reclaimed water is less than the first gas collection
When device uses the half of height, controller control valve position switching device carries out valve position switching, opens the row of the second gas collecting apparatus
Mouth of a river magnetic valve, the discharge outlet magnetic valve of the first gas collecting apparatus is closed, open the exhaust outlet magnetic valve of the first gas collecting apparatus, started
Water pump, the first gas collecting apparatus start water inlet to water is full of, close the exhaust outlet magnetic valve of the first gas collecting apparatus, switch off the pump, beat
The discharge outlet magnetic valve of the first gas collecting apparatus is driven, controller control valve position switching device carries out valve position switching, shale desorption apparatus
The first gas collecting apparatus to shale gas desorption is connected to terminate.
Further, in the step S9, the volume for the shale gas collected per hour is within 0.2 milliliter, then shale gas solution
Suction terminates.
Compared with prior art, the invention has the advantages that：Based on the guiding theory free of discontinuities continuously measured, if
The pattern of the reciprocal alternation of double gas collecting apparatus has been counted, ensure that the continuity of measurement process, has improved the automatic of measurement work
Change degree；Based on instrument miniaturization and portable design requirement, by the use of gas bottle as gas collecting apparatus, and in given volume
On the premise of, using sectional area and the principle being highly inversely proportional, two gas bottles are designed to slender type, and highly identical, internal diameter
Difference, both meet to collect requirement of the tolerance to volume, avoid gas collection process cycle-index excessive, meet current shale gas detection mark again
Sensitivity requirement as defined in standard.
Brief description of the drawings
Fig. 1 is an a kind of schematic diagram of the continuous device for collecting shale stripping gas free of discontinuities of the present invention.
Fig. 2 is a kind of another schematic diagram of the continuous device for collecting shale stripping gas free of discontinuities of the present invention.
Fig. 3 is a schematic diagram of gas collecting apparatus in Fig. 1.
Fig. 4 is a kind of valve position switching schematic diagram of the continuous device for collecting shale stripping gas free of discontinuities of the present invention.
Fig. 5 is an a kind of flow chart of the continuous method for collecting shale stripping gas free of discontinuities of the present invention.
Fig. 6 is the flow chart that preparation is desorbed in Fig. 5.
Fig. 7 is a flow chart of desorption experiment in Fig. 5.
Fig. 8 is the flow chart that end is desorbed in Fig. 5.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is further described.
Fig. 1 and Fig. 2 are refer to, the embodiment provides a kind of continuous dress for collecting shale stripping gas free of discontinuities
Put, including two gas collecting apparatus and a valve position switching device 1, two gas collecting apparatus are respectively the first gas collecting apparatus 21 and the second gas collection dress
22 are put, the first gas collecting apparatus 21 and the second gas collecting apparatus 22 are all connected with valve position switching device 1, the connection water inlet of valve position switching device 1
Device 3 and shale desorption apparatus 4, the valve that the gas collecting apparatus 22 of the first gas collecting apparatus 21 and second passes through valve position switching device 1
Position switching alternate communication water feed apparatus 3 and shale desorption apparatus 4, the valve position of the control valve position switching device 1 of controller 5 are cut
Change.
Shale desorption apparatus 4 produces shale stripping gas, and two gas collecting apparatus collect shale stripping gas by draining gas collection.
First gas collecting apparatus 21 and the second gas collecting apparatus 22 are two small one and large one gas bottles, second gas collecting apparatus
22 be big gas bottle, and first gas collecting apparatus 21 is small gas bottle, and the big gas bottle is identical with the height of small gas bottle, interior
Footpath is different, and the internal diameter of the big gas bottle is 2.5-2.7 times of small gas bottle internal diameter, in the preferred embodiment, small gas bottle
Radius is 15mm, and the radius of big gas bottle is 40mm, and the height of big gas bottle and small gas bottle is 280mm, using highly connecing
Nearly 220mm, small gas bottle integrate air volume as 155mL, and big gas bottle integrates air volume as 1100mL, double gas collecting apparatus circulation industrials
Operation mode, it is always ensured that shale stripping gas enters in the gas collecting apparatus of test, gas collecting apparatus can carry out draining gas collection all the time.
Fig. 3 is refer to, differential pressure pickup 26 is provided with gas collecting apparatus, in one embodiment, differential pressure pickup 26 includes upper
Sampling head 261 and down-sampling first 262, the up-sampling first 261 of the differential pressure pickup 26 measure shale gas in gas collecting apparatus in real time
Pressure, the down-sampling first 262 of the differential pressure pickup 26 measures the pressure of gas collecting apparatus reclaimed water, the differential pressure pickup in real time
26 obtain the height of gas collecting apparatus reclaimed water by the pressure difference of shale gas and water, and then judge that gas collecting apparatus is according to the height of water
It is no to will be filled with shale gas, in one embodiment, the differential pressure pickup 26 measure the height of gas collecting apparatus reclaimed water for 10mm with
When interior, it is set as will be filled with shale gas in gas collecting apparatus, differential pressure pickup 26 connects controller 5, and differential pressure pickup 26 will measure
Collection shale gas situation real-time Transmission to controller 5, make controller 5 judge whether to carry out valve position to valve position switching device 1
Switching.
Fig. 3 is refer to, the top side of gas collecting apparatus is provided with into water/gas port 23 and exhaust outlet 24, the gas collecting apparatus
Lower section side is provided with discharge outlet 25, and the exhaust outlet 24 and discharge outlet 25 are opened and closed by solenoid valve control, the electromagnetism
Valve connects controller 5, and the controller 5 controls the folding of magnetic valve, and the gas collecting apparatus passes through the draining gas collection of water inlet/gas port 23
When, the controller 5 opens the magnetic valve of discharge outlet 25, when the gas collecting apparatus is intake by water inlet/gas port 23, the control
Device 5 opens the magnetic valve of exhaust outlet 24.
Fig. 1 and Fig. 2 are refer to, water feed apparatus 3 includes water pump 31 and tank 32, when the gas collecting apparatus is intake, the water
Water in tank 32 is pumped into gas collecting apparatus by pump 31, during the gas collecting apparatus draining gas collection, the water row in the gas collecting apparatus
Enter in tank 32, the pumping rate of the water pump 31 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 final selection 24V DC can automatically control miniature
Vacuum pump is as water pump.
Fig. 1 and Fig. 2 are refer to, valve position switching device 1 is preferably ten-way valve, and the ten-way valve includes ten valve ports and five
Valve, ten valve ports are respectively 115, No. six mouths of mouth of mouth 114, five of mouth 113, four of mouth 112, three of No.1 mouth 111, two
116th, No. seven mouths 119 of mouth 118, nine of mouth 117, eight and No. ten mouths 120, five valves are respectively the first valve 121, the second valve
122nd, the 3rd valve 123, the 4th valve 124 and the 5th valve 125.
The connection shale of No.1 mouth 111 desorption apparatus 4, No. three mouths 113 and No. nine connection water pumps 31 of mouths 119, described four
Number 114, No. six mouths 116 of mouth connect tank 32 with No. eight mouths 118, and the water/gas 23 of entering of second gas collecting apparatus 22 connects No. ten
Mouth 120, the discharge outlet 25 of the second gas collecting apparatus 22 connect No. seven mouths 117, and the water/gas 23 of entering of first gas collecting apparatus 21 connects
No. two mouths 112, the discharge outlet 25 of the first gas collecting apparatus 21 connect No. five mouths 115.
It refer to Fig. 4, during 21 draining gas collection of the first gas collecting apparatus, first valve 121 is by No.1 mouth 111 and No. two mouths
112 connections, second valve 122 connects No. three mouths 113 with No. four mouths 114, and the 3rd valve 123 is by No. five mouths 115 and six
Number mouth 116 connects, and the 4th valve 124 connects No. seven mouths 117 with No. eight mouths 118, and the 5th valve 125 is by No. nine mouths 119
Connected with No. ten mouths 120, now ten-way valve is located at valve position A, the draining collection of the first gas collecting apparatus 21 connection shale desorption apparatus 4 for definition
Gas, second gas collecting apparatus 22 connect water feed apparatus 3 and intake, and differential pressure pickup 26 measures received in the first gas collecting apparatus 21 in real time
The shale gas of collection, when the height that differential pressure pickup 26 measures the reclaimed water of the first gas collecting apparatus 21 is within 15mm, first collection
When the shale gas collected in device of air 21 will be filled with the first gas collecting apparatus 21, differential pressure pickup 26 is by this information transfer to controller
5, controller 5 controls ten-way valve to rotate, and switching valve position, first valve 121 is connected No.1 mouth 111 with No. ten mouths 120, institute
State the second valve 122 to connect No. three mouths 113 with No. two mouths 112, the 3rd valve 123 connects No. five mouths 115 and No. four mouths 114
Logical, the 4th valve 124 connects No. seven mouths 117 with No. six mouths 116, and the 5th valve 125 is by No. nine mouths 119 and No. eight mouths
118 connections, now ten-way valve is located at valve position B for definition, and the draining gas collection of the second gas collecting apparatus 22 connection shale desorption apparatus 4 is described
First gas collecting apparatus 21 connection water feed apparatus 3 is intake, i.e. when the second gas collecting apparatus 22 starts draining gas collection, moves in circles, make institute
State the first gas collecting apparatus 21 and the second gas collecting apparatus 22 replaces continuous drainage gas collection to shale gas desorption and terminated.
Because gas collecting apparatus will meet gas volume change no more than about 0.20mL precision in 1 hour in the present invention, it is necessary to
The measurement accuracy of differential pressure pickup 26 is improved, and, the mentality of designing measured according to double gas collecting apparatus circulation works and pressure differential method can
Precision is improved in a manner of by controlling gas bottle cross-sectional area.Because control gas bottle height is the whole shale gassiness of control
The key point of tester volume size, it is contemplated that the sectional area of gas bottle is as small as possible.But if two gas bottles
All with the design of the sectional area of very little, to meet to collect tolerance requirement, gas bottle certainly will be designed to it is too high, if two gas collections
Bottle is all designed with larger sectional area, and measurement accuracy is not with reaching requirement.So after considering, two gas bottles are designed
For small one and large one, small gas bottle designs small sectional area to meet accuracy requirement, and big gas bottle is to meet to collect tolerance to volume
It is required that big gas bottle so can both be met to collect tolerance requirement, while can also reach by small seven times of designs of gas bottle sectional area
Meet the design requirement of precision.
Fig. 5-8 are refer to, a kind of continuous method for collecting shale stripping gas free of discontinuities, are comprised the following steps：
Desorption prepares：
S1. valve position switching device 1 connects water feed apparatus 3, and the water feed apparatus 3 connects first by valve position switching device 1
Gas collecting apparatus 21, the magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 is opened, start water pump 31, the water in tank 32 is pumped into the
The gas collecting apparatus 21 of one gas collecting apparatus 21 to the first is full of water；
S2. the magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 is closed, switches the valve position of valve position switching device 1, institute
State water feed apparatus 3 and second gas collecting apparatus 22 is connected by valve position switching device 1, open the electricity of exhaust outlet 24 of the second gas collecting apparatus 22
Magnet valve, the water in tank 32 is pumped into the gas collecting apparatus 22 of the second gas collecting apparatus 22 to the second and is full of water, is switched off the pump；
Desorption experiment：
S3. valve position switching device 1 connects shale desorption apparatus 4, opens the magnetic valve of discharge outlet 25 of the first gas collecting apparatus 21,
First gas collecting apparatus 21 starts draining gas collection；
S4. differential pressure pickup 26 measures the shale gas collected in the first gas collecting apparatus 21 in real time, when the differential pressure pickup
26 measure when will be filled with shale gas in the first gas collecting apparatus 21, and the control valve position switching device 1 of controller 5 carries out valve position and cut
Change, meanwhile, the magnetic valve of discharge outlet 25 of the second gas collecting apparatus 22 of opening, the electromagnetism of discharge outlet 25 of the first gas collecting apparatus 21 of closing
Valve, the magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 to be opened, start water pump 31, the second gas collecting apparatus 22 starts draining gas collection,
First gas collecting apparatus 21 starts to intake；
S5. when the first gas collecting apparatus 21 is full of water, in one embodiment, height of water level reaches 205mm, i.e., full of water, closes
The magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 is closed, switches off the pump 31；
S6. differential pressure pickup 26 measures the shale gas collected in the second gas collecting apparatus 22 in real time, when the differential pressure pickup
26 measure when will be filled with shale gas in the second gas collecting apparatus 22, and the control valve position switching device 1 of controller 5 carries out valve position and cut
Change, meanwhile, the magnetic valve of discharge outlet 25 of the first gas collecting apparatus 21 of opening, the electromagnetism of discharge outlet 25 of the second gas collecting apparatus 22 of closing
Valve, the magnetic valve of exhaust outlet 24 of the second gas collecting apparatus 22 to be opened, start water pump 31, the first gas collecting apparatus 21 starts draining gas collection,
Second gas collecting apparatus 22 starts to intake；
S7. when the second gas collecting apparatus 22 is full of water, the magnetic valve of exhaust outlet 24 of the second gas collecting apparatus 22 is closed, is switched off the pump
31；
S8. repeat step S4-S7 to the volume for the shale gas collected per hour within 5 milliliters；
Desorption terminates：
If S9. shale desorption apparatus 4 connects the second gas collecting apparatus 22, the control valve position switching device 1 of controller 5 carries out valve position
Switching, shale desorption apparatus 4, which connects the first gas collecting apparatus 21 to shale gas desorption, to be terminated；If the connection of shale desorption apparatus 4 first
Gas collecting apparatus 21, and the height of the reclaimed water of the first gas collecting apparatus 21 be more than the first gas collecting apparatus 21 using height half when, one
In embodiment, when the height of the reclaimed water of the first gas collecting apparatus 21 is more than 100mm, continues draining gas collection to shale gas desorption and terminate；If
Shale desorption apparatus 4 connects the first gas collecting apparatus 21, and the height of the reclaimed water of the first gas collecting apparatus 21 is less than the first gas collecting apparatus 21
Using height half when, i.e., when the height of the reclaimed water of the first gas collecting apparatus 21 is less than 100mm, the control valve position of controller 5 switching dress
1 carry out valve position switching is put, opens the magnetic valve of discharge outlet 25 of the second gas collecting apparatus 22, closes the discharge outlet of the first gas collecting apparatus 21
Electric 25 magnet valves, the magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 is opened, starts water pump 31, the first gas collecting apparatus 21 starts to intake
To water be full of, the magnetic valve of exhaust outlet 24 of the first gas collecting apparatus 21 is closed, switches off the pump 31, the row of the first gas collecting apparatus 21 of opening
The magnetic valve of the mouth of a river 25, the control valve position switching device 1 of controller 5 carry out valve position switching, and shale desorption apparatus 4 connects the first gas collection dress
Put 21 to shale gas desorption to terminate, within 0.2 milliliter, then shale gas desorption terminates the volume for the shale gas collected per hour.
The present invention devises pair mould of the reciprocal alternation of gas collecting apparatus based on the guiding theory free of discontinuities continuously measured
Formula, the continuity of measurement process is ensure that, improve the automaticity of measurement 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, it is inversely proportional using sectional area and height
Principle, two gas bottles are designed to slender type, and highly identical, internal diameter is different, both meets to collect requirement of the tolerance to volume, keeps away
It is excessive to exempt from gas collection process cycle-index, meets sensitivity requirement as defined in current shale gas examination criteria again.
Herein, the involved noun of locality such as forward and backward, upper and lower is to be located at parts in accompanying drawing in figure and zero
The mutual position of part is intended merely to the clear of expression technology scheme and conveniently come what is defined.It should be appreciated that the noun of locality
Use should not limit the claimed scope of the application.
In the case where not conflicting, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of continuous device for collecting shale stripping gas free of discontinuities, it is characterised in that cut including two gas collecting apparatus and a valve position
Changing device, two gas collecting apparatus are respectively the first gas collecting apparatus and the second gas collecting apparatus, first gas collecting apparatus and the second gas collection
Device is all connected with valve position switching device, valve position switching device connection water feed apparatus and shale desorption apparatus, first collection
Device of air and the second gas collecting apparatus switch alternate communication water feed apparatus and shale desorption apparatus by the valve position of valve position switching device,
First gas collecting apparatus connects shale desorption apparatus draining gas collection, the second gas collecting apparatus connection water feed apparatus water inlet, institute
When stating the shale gas collected in the first gas collecting apparatus and will be filled with the first gas collecting apparatus, valve position switching device carries out valve position and cut
Changing, second gas collecting apparatus connects shale desorption apparatus draining gas collection, and the first gas collecting apparatus connection water feed apparatus is intake,
First gas collecting apparatus and the second gas collecting apparatus replace continuous drainage gas collection to shale gas desorption and terminated.
2. the continuous device for collecting shale stripping gas free of discontinuities according to claim 1, it is characterised in that first collection
Differential pressure pickup is equipped with device of air and the second gas collecting apparatus, the differential pressure pickup connects controller, the controller control
The valve position switching of valve position processed switching device, the differential pressure pickup measures the shale gas collected in gas collecting apparatus in real time, when described
Differential pressure pickup is measured when shale gas is will be filled with gas collecting apparatus, and information is transmitted to controller by the differential pressure pickup, described
Controller control valve position switching device carries out valve position switching.
3. the continuous device for collecting shale stripping gas free of discontinuities according to claim 2, it is characterised in that the pressure difference passes
Sensor includes up-sampling head and down-sampling head, the up-sampling head of the differential pressure pickup measure shale gas in gas collecting apparatus in real time
Pressure, the down-sampling head of the differential pressure pickup measure the pressure of gas collecting apparatus reclaimed water, pass through shale gas and the pressure of water in real time
Difference obtains the height of gas collecting apparatus reclaimed water, when the height of the gas collecting apparatus reclaimed water is less than 15mm, the controller control valve
Position switching device carries out valve position switching.
4. the continuous device for collecting shale stripping gas free of discontinuities according to claim 2, it is characterised in that the gas collection dress
The top side put is provided with into water/gas port and exhaust outlet, the lower section side of the gas collecting apparatus and is provided with discharge outlet, the exhaust outlet
Opened and closed with discharge outlet by solenoid valve control, the magnetic valve connects controller, the controller control magnetic valve
Folding, when the gas collecting apparatus is by water inlet/gas port draining gas collection, the controller opens the magnetic valve of discharge outlet, the collection
When device of air is intake by water inlet/gas port, the controller opens the magnetic valve of exhaust outlet.
5. the continuous device for collecting shale stripping gas free of discontinuities according to claim 4, it is characterised in that the water inlet dress
Put including water pump and tank, when the gas collecting apparatus is intake, the water in tank is pumped into gas collecting apparatus by the water pump, the collection
During device of air draining gas collection, the water in the gas collecting apparatus is discharged into tank.
6. the continuous device for collecting shale stripping gas free of discontinuities according to claim 5, it is characterised in that cut the valve position
Change the outfit and be set to ten-way valve, the ten-way valve includes ten valve ports and five valves, ten valve ports be respectively No.1 mouth, No. two mouths,
No. three mouths, No. four mouths, No. five mouths, No. six mouths, No. seven mouths, No. eight mouths, No. nine mouths and No. ten mouths, five valves are respectively first
Valve, the second valve, the 3rd valve, the 4th valve and the 5th valve, the No.1 mouth connect shale desorption apparatus, No. three mouths and No. nine mouths
Water pump is connected, No. four mouths, No. six mouths and No. eight mouth connection tanks, the water/gas of entering of second gas collecting apparatus connect No. ten
Mouthful, the discharge outlet of the second gas collecting apparatus connects No. seven mouths, and the water/gas of entering of first gas collecting apparatus connects No. two mouths, the first collection
The discharge outlet of device of air connects No. five mouths；During the first gas collecting apparatus draining gas collection, first valve is by No.1 mouth and No. two
Mouth connection, second valve connect No. three mouths and No. four mouths, and the 3rd valve connects No. five mouths and No. six mouths, and the described 4th
Valve connects No. nine mouths and No. ten mouths No. seven mouths and No. eight mouth connections, the 5th valve, the second gas collecting apparatus draining collection
During gas, ten-way valve is rotated, makes first valve that No. three mouths and No. two mouths to be connected to No.1 mouth and No. ten mouth connections, second valve
Logical, the 3rd valve connects No. five mouths and No. four mouths, and the 4th valve connects No. seven mouths and No. six mouths, and the 5th valve will
No. nine mouths and No. eight mouth connections.
7. the continuous device for collecting shale stripping gas free of discontinuities according to claim 5, it is characterised in that the water pump
Pumping rate is more than the desorption rate of shale gas.
8. the continuous device for collecting shale stripping gas free of discontinuities according to claim 1, it is characterised in that first collection
Device of air and the second gas collecting apparatus are two small one and large one gas bottles, and second gas collecting apparatus is big gas bottle, described
One gas collecting apparatus is small gas bottle, and the big gas bottle is identical with the height of small gas bottle, and internal diameter is different, the big gas bottle
Internal diameter is 2.5-2.7 times of small gas bottle internal diameter.
9. the continuous device for collecting shale stripping gas free of discontinuities according to claim any one of 1-8 carries out free of discontinuities continuous
The method for collecting shale stripping gas, it is characterised in that comprise the following steps：
S1. valve position switching device connection water feed apparatus, the water feed apparatus connect the first gas collecting apparatus by valve position switching device,
The exhaust outlet magnetic valve of the first gas collecting apparatus is opened, starts water pump, the water in tank is pumped into the first gas collecting apparatus to the first collection
Device of air is full of water；
S2. the exhaust outlet magnetic valve of the first gas collecting apparatus is closed, switches the valve position of valve position switching device, the water feed apparatus
Second gas collecting apparatus is connected by valve position switching device, the exhaust outlet magnetic valve of the second gas collecting apparatus is opened, by the water in tank
It is pumped into the second gas collecting apparatus to the second gas collecting apparatus and is full of water, switches off the pump；
S3. valve position switching device connection shale desorption apparatus, the discharge outlet magnetic valve of the first gas collecting apparatus, the first gas collection dress are opened
Put and start draining gas collection；
S4. the differential pressure pickup shale gas collected in the first gas collecting apparatus of measurement in real time, when the differential pressure pickup measures the
When will be filled with shale gas in one gas collecting apparatus, controller control valve position switching device carries out valve position switching, meanwhile, open the
The discharge outlet magnetic valve of two gas collecting apparatus, the discharge outlet magnetic valve of the first gas collecting apparatus is closed, open the row of the first gas collecting apparatus
Gas port magnetic valve, start water pump, the second gas collecting apparatus starts draining gas collection, and the first gas collecting apparatus starts to intake；
S5. when the first gas collecting apparatus is full of water, the exhaust outlet magnetic valve of the first gas collecting apparatus is closed, is switched off the pump；
S6. the differential pressure pickup shale gas collected in the second gas collecting apparatus of measurement in real time, when the differential pressure pickup measures the
When will be filled with shale gas in two gas collecting apparatus, controller control valve position switching device carries out valve position switching, meanwhile, open the
The discharge outlet magnetic valve of one gas collecting apparatus, the discharge outlet magnetic valve of the second gas collecting apparatus is closed, open the row of the second gas collecting apparatus
Gas port magnetic valve, start water pump, the first gas collecting apparatus starts draining gas collection, and the second gas collecting apparatus starts to intake；
S7. when the second gas collecting apparatus is full of water, the exhaust outlet magnetic valve of the second gas collecting apparatus is closed, is switched off the pump；
S8. repeat step S4-S7, until the volume for the shale gas collected per hour is within 5 milliliters；
If S9. shale desorption apparatus connects the second gas collecting apparatus, controller control valve position switching device carries out valve position switching, shale
Desorption apparatus, which connects the first gas collecting apparatus to shale gas desorption, to be terminated；If shale desorption apparatus the first gas collecting apparatus of connection, and the
When the height of one gas collecting apparatus reclaimed water uses the half of height more than the first gas collecting apparatus, continue draining gas collection to shale gas and desorb
Terminate；If shale desorption apparatus connects the first gas collecting apparatus, and the height of the first gas collecting apparatus reclaimed water is less than the first gas collecting apparatus
Using height half when, controller control valve position switching device carry out valve position switching, open the second gas collecting apparatus discharge outlet
Magnetic valve, the discharge outlet magnetic valve of the first gas collecting apparatus is closed, open the exhaust outlet magnetic valve of the first gas collecting apparatus, start water
Pump, the first gas collecting apparatus start water inlet to water is full of, close the exhaust outlet magnetic valve of the first gas collecting apparatus, switch off the pump, open
The discharge outlet magnetic valve of first gas collecting apparatus, controller control valve position switching device carry out valve position switching, and shale desorption apparatus connects
Logical first gas collecting apparatus to shale gas desorption terminates.
10. the continuous method for collecting shale stripping gas free of discontinuities according to claim 9, it is characterised in that the step
In S9, within 0.2 milliliter, then shale gas desorption terminates the volume for the shale gas collected per hour.
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| CN201710836119.6A CN107449641B (en) | 2017-09-16 | 2017-09-16 | Device and method for continuously collecting shale desorption gas without interruption |
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| CN109297771A (en) * | 2018-10-31 | 2019-02-01 | 重庆大学 | Shale gas fast desorption test device |
| CN110005938A (en) * | 2019-04-23 | 2019-07-12 | 杭州杭氧低温液化设备有限公司 | A kind of continuous punching bottle automating krypton xenon-133 gas |
| CN112697641A (en) * | 2020-12-08 | 2021-04-23 | 武汉库仑特科技有限公司 | Reciprocating gas collection type shale desorption test analyzer |
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