CN109001418A - A kind of aqueous coal body de-plugging aptitude tests device and test method - Google Patents
A kind of aqueous coal body de-plugging aptitude tests device and test method Download PDFInfo
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- CN109001418A CN109001418A CN201810403677.8A CN201810403677A CN109001418A CN 109001418 A CN109001418 A CN 109001418A CN 201810403677 A CN201810403677 A CN 201810403677A CN 109001418 A CN109001418 A CN 109001418A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/222—Solid fuels, e.g. coal
Abstract
The invention discloses a kind of aqueous coal body de-plugging aptitude tests device and test method, test device includes coal sample retained part, temperature acquisition control section, steam condensing reflux part, medium infeed part, gas collection part, part of catchmenting；When test, water saturation is carried out to coal body sample injection moisture first, then the natural drainage amount under gravity is tested, gas injection displacement is measured finally by injection gas medium, first calculate the difference of total water injection rate Yu natural drainage amount, then the ratio for calculating gas injection displacement and the difference compares index using the discharge of the ratio as assessment coal seam de-plugging ability.The gas injection de-plugging ability of assessment different coal coal quality coal body may be implemented, also it may be implemented for same coal core sample testing and calculate the discharge of different displacement pressure gas and compare index, and then different displacement pressure gas is obtained to the affecting laws of gas injection de-plugging ability, and then be allocated as industry for the high pressure gas displacement coal seam water of colliery scene and basic data support and theoretical direction are provided.
Description
Technical field
It is specifically a kind of for the aqueous coal body coal sample of underground coal mine the present invention relates to a kind of test device and test method
De-plugging aptitude tests device and test method belong to coal body the field of test technology.
Background technique
Such as gas explosion, coal and gas prominent mine disaster are the incident main disasters of mine in process of coal mining
Evil.Gas contained by China's high-order coal and low-order coal accounts for 2/3 or more in total resources, in China's coal-mine highly gassy mine and coal with
Gas Outburst mine accounts for 15% or so.For guarantee coal mining safety, usually need to using special equipment coal seam, rock stratum and
Gas (coal bed gas) extraction or discharge, the gas permeability for improving coal seam in goaf can effectively carry out gas drainage under suction.But China's coal
Gas (coal bed gas) preservation of mine is special, with micropore, low-permeability, the high feature adsorbed, China's coal-mine coal seam permeability
Averagely there was only 1.1974 × 10-18~1.1596 × 10-14m2.Wherein permeability is less than 0.1987 × 10-16m2Account for 35%,
0.1987×10-16~0.1987 × 10-15m237% is accounted for, is greater than 0.1987 × 10-15m2Only account for 28%.Coal bed gas Ground Developing
Constituency usually requires that the permeability in coal seam not less than 0.1987 × 10-15m2, and the projecting coal bed permeability of China's high methane is usually all
Less than 0.1987 × 10-15m2。
To improve gas permeability of coal seam, occurs the anti-reflection technology of various releases in the prior art, such as high-pressure water jet slot, deep hole
Standing and high-pressure hydraulic pressure break etc..Wherein since effective radius of influence of high-pressure hydraulic fracturing technique is big, can be significantly
It reduces the project amount of construction drill, generate good economic and social benefits, therefore high-pressure hydraulic fracturing technique is widely used in me
State's coal mine.But due to the tension force effect of water, it is residual that part water is had after water injects coal seam coal body using high-pressure hydraulic fracturing technique
There are being difficult to be discharged in cracks in coal seam, coal body hole, crack blocking are in turn resulted in, this is solved there is presently no mature method and asks
Topic.Some Domestic mine is attempted to carry out de-plugging, high pressure gas after charging using high pressure gas displacement come discharge part remaining water
It can be air, nitrogen or carbon dioxide etc..But China's coal seam conditions are multifarious, different coal coal body is made in high pressure gas
With the having differences property of ability of lower discharge moisture, different high-pressure gas mediums, which act on same coal seam coal body, makes coal body that moisture be discharged
Ability there is also othernesses.At present still without the pertinent literature record and related data for coal seam gas injection de-plugging aptitude tests
It records.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of aqueous coal body de-plugging aptitude tests device and test method, Neng Goushi
The ability for now aqueous coal body being discharged under the effect of high pressure displacing gases moisture is tested, and then is the high pressure gas of colliery scene
Body displacement coal seam water is allocated as industry and provides basic data support and theoretical direction.
To achieve the above object, this aqueous coal body de-plugging aptitude tests device includes coal sample retained part, temperature acquisition control
Make part, steam condensing reflux part, medium infeed part, gas collection part, part of catchmenting；
The coal sample retained part includes coal sample clamping device, and coal sample clamping device is the case with closed accommodating cavity
Type structure, the top of box-structure are equipped with medium injection pipe, one end of medium injection pipe and the closed receiving of coal sample clamping device
The top of cavity penetrates through connection, and the bottom of box-structure is equipped with outlet pipe, and one end of outlet pipe is closed with coal sample clamping device
The bottom of accommodating cavity penetrates through connection；
The temperature acquisition control section includes electrical heat tracing liner, temperature transducer and heating temperature control mechanism；Electricity
Heating and thermal insulation liner is arranged in inside the coal sample clamping device of box-structure and electrical heat tracing liner is around coal sample clamping device
Closed accommodating cavity setting；The thermometric end of temperature transducer runs through the coal sample clamping device of box-structure and stretches to closed appearance
Receive the inside of cavity；Heating temperature control mechanism includes controller, heating control circuit, temperature feedback loop, controller respectively with electricity
Heating and thermal insulation liner and temperature transducer electrical connection；
The water collecting part point includes catch basin；
The steam condensing reflux part includes return tee joint shut-off valve, return pipe and steam condenser pipe；Return tee joint
The first port of shut-off valve is connect with the other end of medium injection pipe, and the one of the second port of return tee joint shut-off valve and return pipe
End connection, the other end of return pipe and the steam input terminal of steam condenser pipe connect, and the condensation end of steam condenser pipe passes through pipeline
It is connect with catch basin；
The medium feeds part and includes pressure indicator, medium injection three-way cut-off valve, water flux tester, supplies water
Mechanism, pressure reducing valve and gas injection pressure gas cylinder；Medium inject the first port of three-way cut-off valve by pressure indicator and pipeline with
The third port of return tee joint shut-off valve connects, and the second port that medium injects three-way cut-off valve passes through water flux tester and pipe
Road is connect with water supply mechanism, and the third port that medium injects three-way cut-off valve is connected by pressure reducing valve and pipeline and gas injection pressure gas cylinder
It connects；
The gas collection part includes letting out valve door, moisture trap, water discharging valve, water volume flow rate recorder, gas collection
Condenser pipe, collection air valve sum aggregate gas cylinder；The other end of one end and outlet pipe for letting out valve door connects, let out the other end of valve door with
The input terminal of moisture trap connects, and the water route output end of moisture trap passes sequentially through water discharging valve and water volume flow rate record
Instrument is connect with catch basin, and the gas circuit output end of moisture trap is connected to connection, collection air cooling with the gas circuit input terminal of gas collection condenser pipe
The condensation output end of solidifying pipe passes through the pipeline connection connection between pipeline and water discharging valve and water volume flow rate recorder, collection air cooling
The gas circuit output end of solidifying pipe is connect by collecting air valve with gas bottle.
As a further improvement of the present invention, the return tee joint shut-off valve and medium injection three-way cut-off valve are equal
It is Electromagnetic Control three-way cut-off valve, let out valve door, water discharging valve, collection air valve and the pressure reducing valve are solenoid electric valves,
The water supply mechanism be equipped with electric control valve, the gas injection pressure gas cylinder be equipped with electric control valve, the water flux tester,
Pressure indicator and water volume flow rate recorder all have data-out port；Aqueous coal body de-plugging aptitude tests device further includes
Electric control part, electric control part include that industrial control computer, coal sample heating control circuit, water filling control loop, gas injection control back
Road and data calculate output loop, and industrial control computer is injected with heating temperature control mechanism, return tee joint shut-off valve, medium respectively
Three-way cut-off valve, the electric control valve of gas injection pressure gas cylinder, pressure indicator, lets out valve door, draining at the electric control valve of water supply mechanism
Valve, collection air valve, water flux tester, pressure reducing valve, the electrical connection of water volume flow rate recorder.
As a further improvement of the present invention, the coal sample clamping device include coal sample sleeve, upper packer accessory, on
Sealing cover, lower packer accessory and lower sealing cover；The inner surface upper and lower ends of coal sample sleeve are equipped with installation internal screw thread, and the electricity adds
Hot heat-preservation liner surrounds the outside that coal sample sleeve is arranged in；Upper packer accessory and lower packer accessory are the multi-diameter shaft knots of setting symmetrical above and below
Structure, stepped shaft structure include major diameter section and path section, the internal diameter cooperation of the outer diameter and coal sample sleeve of major diameter section and on
The major diameter section of packer accessory and lower packer accessory is oppositely arranged up and down, and the major diameter section of upper packer accessory and lower packer accessory passes through gasket respectively
Circle and coal sample sleeve airtight connection；Upper packer accessory is equipped in axial direction through the medium injection channel of upper packer accessory and thermometric
Channel, the top of medium injection channel are connected to connection, the top in thermometric channel and the fixed company of temperature transducer with medium injection pipe
It connects；Lower packer accessory is equipped with the exhalant canal in axial direction running through lower packer accessory, and the bottom end of exhalant canal is connected to outlet pipe
Connection；Top cover labyrinth and lower sealing cover are external thread sleeve structure symmetrical above and below, the internal diameter and ladder of external thread sleeve structure
The outer diameter cooperation of the path section of axle construction, the installation dimension of inner screw thread of external screw thread and coal sample sleeve cooperate, external screw thread noose
Structure socket is mounted in the path section of stepped shaft structure and external thread sleeve structure is mounted on coal sample sleeve by being threadedly engaged.
As a further improvement of the present invention, the top of medium injection channel and the connection position of medium injection pipe install
There is medium to inject sealing element, the top in thermometric channel and the link position of temperature transducer are equipped with thermometric sealing element, exhalant canal
Bottom end and outlet pipe link position be equipped with water outlet seals.
As a further improvement of the present invention, the major diameter section end face of the stepped shaft structure of upper packer accessory and lower packer accessory
It is equipped with the groove structure being recessed to path section direction.
As a further improvement of the present invention, the groove structure on the stepped shaft structure major diameter section end face of lower packer accessory
Small big conical socket structure under being arranged to.Conical socket structure has drainage function, collecting convenient for water flow.
As a kind of embodiment of condenser pipe of the present invention, the steam condenser pipe sum aggregate gas condenser pipe is straight condensation
Pipe.
As a further improvement of the present invention, coal sample sleeve, upper packer accessory and lower packer accessory are all made of resistant to high temperature
Transparent material makes, and the position of corresponding upper packer accessory and lower packer accessory is equipped with observation window on coal sample clamping device.
A kind of test method of aqueous coal body de-plugging aptitude tests device, specifically includes the following steps:
A. it chooses coal sample: taking bulk coal sample in coal seam to be tested, record coal measure strata temperature, then sealed package is transported to reality
Test room；
B. the production of coal core sample and installation: coal core is made according to the shape and size of the closed accommodating cavity of coal sample clamping device
Sample, and coal core sample is installed in the closed accommodating cavity of coal sample clamping device and being sealed；
C. the drying process of coal core sample: operation return tee joint shut-off valve makes medium injection pipe and return pipe be in connected state
State is then turned on heating temperature control mechanism, and coal core sample is slowly heated to 100 DEG C by the Real-time Feedback of temperature transducer and is protected
Temperature is then shut off heating temperature control mechanism and return tee joint shut-off valve until moisture is no longer precipitated in steam condenser pipe, stops heating simultaneously
Gradually be cooled to temperature it is constant until；
D. the water flood treatment of coal core sample: operation return tee joint shut-off valve makes to manage where medium injection pipe and pressure indicator
It is managed where pipeline and water flux tester where road is in connected state, operation medium injection three-way cut-off valve makes pressure indicator
Road is in connected state, open water supply mechanism to the internal water flooding of coal sample clamping device, until saturation, is referred to during water filling by pressure
Show that instrument observes water injection pressure, read the numerical value of water flux tester and record total water injection rate, is then shut off return tee joint shut-off valve
Three-way cut-off valve is injected with medium；
E. it the natural drainage processing of coal core sample: opens and lets out valve door, water discharging valve sum aggregate air valve, in coal core sample
Water is discharged into catch basin through water volume flow rate recorder under self gravitation effect, records the natural drainage amount under gravity, directly
Until no longer draining, it is then shut off and lets out valve door, water discharging valve sum aggregate air valve；
F. the gas injection processing of coal core sample: heating temperature control mechanism is reopened, and heating temperature is set as coal core sample
The coal measure strata temperature in the coal seam to be tested at place, heat preservation after heating is until temperature is constant；It is then turned on and lets out valve door, drain valve
Door sum aggregate air valve, and operating return tee joint shut-off valve makes pipeline where medium injection pipe and pressure indicator be in connected state
Pipeline where pipeline where state, operation medium injection three-way cut-off valve make pressure indicator and pressure reducing valve is in connected state, will
The pressure of pressure reducing valve opens gas injection pressure gas after being set as the practical coal seam gas injection pressure in the coal seam to be tested where coal core sample
Bottle observes gas injection pressure, observation water volume flow rate note by pressure indicator during gas injection to coal sample clamping device internal gas injection
Record instrument until moisture trap sum aggregate gas condenser pipe is not then exhausted from water and records gas injection displacement；
G. sampled-data processing calculates output: successively closing heating temperature control mechanism, medium injection three-way cut-off valve, reflux three
Logical shut-off valve lets out valve door, water discharging valve sum aggregate air valve, first calculates the difference of total water injection rate Yu natural drainage amount, then counts
The ratio for calculating gas injection displacement and the difference compares index using the discharge of the ratio as assessment coal seam de-plugging ability.
Compared with prior art, this aqueous coal body de-plugging aptitude tests device and test method can be by replacements according to not
Coal core sample with the preparation of Coal Quality coal body realizes test and calculates discharge than index, and then assesses different coal coal quality coal body
Gas injection de-plugging ability；It is built-in with the gas injection pressure gas cylinder of different pressures gas by replacing, may be implemented for same coal core
Sample testing simultaneously calculates the discharge of different displacement pressure gas than index, and then obtains different displacement pressure gas to same
The affecting laws of coal core sample gas injection de-plugging ability, and then be allocated as industry for the high pressure gas displacement coal seam water of colliery scene and base is provided
Plinth data are supported and theoretical direction.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of coal sample clamping device of the present invention.
In figure: 1, coal sample clamping device, 2, heating temperature control mechanism, 3, electrical heat tracing liner, 4, coal core sample, 5, thermometric
Sensor, 6, return tee joint shut-off valve, 7, medium injection pipe, 8, return pipe, 9, steam condenser pipe, 10, catch basin, 11, medium
Inject three-way cut-off valve, 12, water supply mechanism, 13, water flux tester, 14, pressure indicator, 15, let out valve door, 16, air water
Separator, 17, water discharging valve, 18, water volume flow rate recorder, 19, pressure reducing valve, 20, gas injection pressure gas cylinder, 21, collection air valve,
22, gas collection condenser pipe, 23, gas bottle, 24, coal sample sleeve, 25, top cover labyrinth, 26, lower sealing cover, 27, upper packer accessory, 28, under
Packer accessory, 29, thermometric sealing element, 30, medium injection sealing element, 31, water outlet seals, 32, outlet pipe, 33, seal washer.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, this aqueous coal body de-plugging aptitude tests device includes coal sample retained part, temperature acquisition control unit
Divide, steam condensing reflux part, medium infeed part, gas collection part, part of catchmenting.
The coal sample retained part includes coal sample clamping device 1, and coal sample clamping device 1 has closed accommodating cavity
Box-structure, the top of box-structure are equipped with medium injection pipe 7, and one end of medium injection pipe 7 is closed with coal sample clamping device 1
The top of accommodating cavity penetrates through connection, and the bottom of box-structure is equipped with outlet pipe 32, one end of outlet pipe 32 and coal sample clamping machine
The bottom of the closed accommodating cavity of structure 1 penetrates through connection.
The temperature acquisition control section includes electrical heat tracing liner 3, temperature transducer 5 and heating temperature control mechanism 2；
Electrical heat tracing liner 3 is arranged in inside the coal sample clamping device 1 of box-structure and electrical heat tracing liner 3 is pressed from both sides around coal sample
Hold the closed accommodating cavity setting of mechanism 1；The thermometric end of temperature transducer 5 runs through the coal sample clamping device 1 of box-structure and stretches
Enter to the inside of closed accommodating cavity；Heating temperature control mechanism 2 includes controller, heating control circuit, temperature feedback loop, control
Device is electrically connected with electrical heat tracing liner 3 and temperature transducer 5 respectively.
The water collecting part point includes catch basin 10.
The steam condensing reflux part includes return tee joint shut-off valve 6, return pipe 8 and steam condenser pipe 9；Reflux three
The first port of logical shut-off valve 6 is connect with the other end of medium injection pipe 7, the second port and reflux of return tee joint shut-off valve 6
One end of pipe 8 connects, and the other end of return pipe 8 is connect with the steam input terminal of steam condenser pipe 9, the condensation of steam condenser pipe 9
End is connect by pipeline with catch basin 10.
It includes pressure indicator 14, medium injection three-way cut-off valve 11, water flux tester that the medium, which feeds part,
13, water supply mechanism 12, pressure reducing valve 19 and gas injection pressure gas cylinder 20；The first port of medium injection three-way cut-off valve 11 passes through pressure
Indicator 14 and pipeline are connect with the third port of return tee joint shut-off valve 6, and medium injects the second port of three-way cut-off valve 11
It is connect by water flux tester 13 and pipeline with water supply mechanism 12, the third port of medium injection three-way cut-off valve 11 is by subtracting
Pressure valve 19 and pipeline are connect with gas injection pressure gas cylinder 20.
The gas collection part includes letting out valve door 15, moisture trap 16, water discharging valve 17, water volume flow rate recorder
18, gas collection condenser pipe 22, collection air valve 21 and gas bottle 23；The one end for letting out valve door 15 is connect with the other end of outlet pipe 32,
The other end for letting out valve door 15 is connect with the input terminal of moisture trap 16, and the water route output end of moisture trap 16 passes sequentially through
Water discharging valve 17 and water volume flow rate recorder 18 are connect with catch basin 10, and the gas circuit output end and collection of moisture trap 16 are gas-cooled
The gas circuit input terminal of solidifying pipe 22 is connected to connection, and the condensation output end of gas collection condenser pipe 22 passes through pipeline and water discharging valve 17 and water body
Pipeline connection connection between product flow registering instrument 18, the gas circuit output end of gas collection condenser pipe 22 pass through collection air valve 21 and gas collection
Bottle 23 connects.
By taking the coal body de-plugging ability that need to understand certain coal mine underground coal seam as an example, this aqueous coal body de-plugging aptitude tests device exists
When carrying out coal sample test, bulk coal sample is taken in coal seam to be tested first, record coal measure strata temperature is 25 DEG C, then sealed package
It is transported to laboratory；
Then coal core sample is made according to φ 5cm × 10cm size of 1 cylindrical enclosure accommodating cavity of coal sample clamping device
4, and will be sealed in the installation to the closed accommodating cavity of coal sample clamping device 1 of coal core sample 4；
Operation return tee joint shut-off valve 6 makes medium injection pipe 7 and return pipe 8 be in connected state, is then turned on heating temperature
Mechanism 2 is controlled, coal core sample 4 is slowly heated to 100 DEG C by the Real-time Feedback of temperature transducer 5 and is kept the temperature, until steam is cold
Moisture is no longer precipitated in solidifying pipe 9, is then shut off heating temperature control mechanism 2 and return tee joint shut-off valve 6, stops heating and being gradually cooled to
Until temperature is constant；
Then operation return tee joint shut-off valve 6 makes medium injection pipe 7 and 14 place pipeline of pressure indicator be in connected state
State, operation medium injection three-way cut-off valve 11 are in 14 place pipeline of pressure indicator and 13 place pipeline of water flux tester
Connected state, open water supply mechanism 12 to 1 internal water flooding of coal sample clamping device, until saturation, during water filling by pressure instruction
Instrument 14 observes water injection pressure, and reading the numerical value of water flux tester 13 and recording total water injection rate is 20cm3, it is then shut off reflux three
Logical shut-off valve 6 and medium inject three-way cut-off valve 11；
It is then turned on and lets out valve door 15,17 sum aggregate air valve 21 of water discharging valve, the water in coal core sample 4 is made in self gravity
It is discharged into catch basin 10 through water volume flow rate recorder 18 with lower, until no longer draining, records the natural row under gravity
Water is 4cm3, it is then shut off and lets out valve door 15,17 sum aggregate air valve 21 of water discharging valve；
Then heating temperature control mechanism 2 is reopened, and heating temperature is set as 25 DEG C, heat preservation after heating is until temperature is permanent
It is fixed；
It is then turned on and lets out valve door 15,17 sum aggregate air valve 21 of water discharging valve, and operate return tee joint shut-off valve 6 to make medium
Injection pipe 7 is in connected state with 14 place pipeline of pressure indicator, operation medium injection three-way cut-off valve 11 indicates pressure
14 place pipeline of instrument and 19 place pipeline of pressure reducing valve are in connected state, and the pressure of pressure reducing valve 19 is set as practical coal seam gas injection
Gas injection pressure gas cylinder 20 is opened after pressure 10MPa to 1 internal gas injection of coal sample clamping device, passes through pressure indicator 14 during gas injection
Gas injection pressure is observed, observation water volume flow rate recorder 18 is not until 16 sum aggregate gas condenser pipe 22 of moisture trap is then exhausted from water and is
Only and gas injection displacement is recorded as 10cm3；
It finally successively closes heating temperature control mechanism 2, medium injection three-way cut-off valve 11, return tee joint shut-off valve 6, let out valve
Door 15,17 sum aggregate air valve 21 of water discharging valve, first calculate the difference of total water injection rate Yu natural drainage amount, then calculate gas injection draining
The ratio of amount and the difference, the discharge using the ratio as assessment coal seam de-plugging ability is than index, i.e. discharge ratio are as follows: 10cm3/
(20cm3-4cm3)=0.625.
In order to realize the automatic operation of test process, as a further improvement of the present invention, described is returned
Flowing three-way cut-off valve 6 and medium injection three-way cut-off valve 11 is Electromagnetic Control three-way cut-off valve, and described lets out valve door 15, row
Penstock 17, collection air valve 21 and pressure reducing valve 19 are solenoid electric valves, and the water supply mechanism 12 is equipped with electric control valve, described
Gas injection pressure gas cylinder 20 be equipped with electric control valve, the water flux tester 13, pressure indicator 14 and water volume flow rate note
Record instrument 18 all has data-out port；Aqueous coal body de-plugging aptitude tests device further includes electric control part, and electric control part includes
Industrial control computer, coal sample heating control circuit, water filling control loop, gas injection control loop and data calculate output loop,
Industrial control computer injects three-way cut-off valve 11, water supplying machine with heating temperature control mechanism 2, return tee joint shut-off valve 6, medium respectively
The electric control valve of structure 12, pressure indicator 14, lets out valve door 15, water discharging valve 17, collection at the electric control valve of gas injection pressure gas cylinder 20
Air valve 21, water flux tester 13, pressure reducing valve 19, water volume flow rate recorder 18 are electrically connected.Pass through industrial control computer
Control may be implemented heating temperature control mechanism 2 and each valve automatic open close, may be implemented automatic data acquisition and calculate.
Be mounted on inside the closed accommodating cavity of coal sample clamping device 1 for the ease of coal core sample 4, as it is of the invention into
One step improvement project, as shown in Fig. 2, the coal sample clamping device 1 includes coal sample sleeve 24, upper packer accessory 27, top cover labyrinth
25, lower packer accessory 28 and lower sealing cover 26；The inner surface upper and lower ends of coal sample sleeve 24 are equipped with installation internal screw thread, the electricity
Heating and thermal insulation liner 3 surrounds the outside that coal sample sleeve 24 is arranged in；Upper packer accessory 27 and lower packer accessory 28 are settings symmetrical above and below
Stepped shaft structure, stepped shaft structure includes major diameter section and path section, the outer diameter of major diameter section and the internal diameter of coal sample sleeve 24
The major diameter section of dimensional fits and upper packer accessory 27 and lower packer accessory 28 is oppositely arranged up and down, upper packer accessory 27 and lower packer accessory 28
Major diameter section pass through seal washer 33 and 24 airtight connection of coal sample sleeve respectively；Upper packer accessory 27, which is equipped with, in axial direction to be run through
The medium injection channel and thermometric channel of upper packer accessory 27, the top of medium injection channel are connected to connection with medium injection pipe 7, survey
The top in warm channel is fixedly connected with temperature transducer 5；Lower packer accessory 28 is equipped in axial direction through lower packer accessory 28
The bottom end of exhalant canal, exhalant canal is connected to connection with outlet pipe 32；Top cover labyrinth 25 and lower sealing cover 26 are symmetrical above and below
External thread sleeve structure, the outer diameter cooperation of the path section of the internal diameter and stepped shaft structure of external thread sleeve structure, external screw thread
Cooperate with the installation dimension of inner screw thread of coal sample sleeve 24, the socket of external thread sleeve structure is mounted in the path section of stepped shaft structure,
And external thread sleeve structure is mounted on coal sample sleeve 24 by being threadedly engaged.Packer accessory 27 or lower packer accessory are loaded by disassembly group
28 may be implemented the merging or taking-up of coal core sample 4.
In order to further ensure the obturation effect of 1 inner cavity of coal sample clamping device, as a further improvement of the present invention,
The top of medium injection channel and the link position of medium injection pipe 7 are equipped with medium and inject sealing element 30, the top in thermometric channel
It is equipped with thermometric sealing element 29 with the link position of temperature transducer 5, the bottom end of exhalant canal and the connection position of outlet pipe 32 install
There are water outlet seals 31.
In order to realize the moisture in uniformly water filling or gas injection, realization uniform collection coal core sample 4, as of the invention into one
The major diameter section end face of the stepped shaft structure of step improvement project, upper packer accessory 27 and lower packer accessory 28 is equipped with recessed to path section direction
Sunken groove structure.
For the ease of collecting the moisture in coal core sample 4, as a further improvement of the present invention, lower packer accessory 28
Groove structure on stepped shaft structure major diameter section end face small big conical socket structure under being arranged to.Conical socket structure has
Drainage function, collecting convenient for water flow.
As a kind of embodiment of condenser pipe of the present invention, the 9 sum aggregate gas condenser pipe 22 of steam condenser pipe is straight
Condenser pipe.
Situation, as a further improvement of the present invention, coal sample sleeve 24, upper packer accessory 27 are filled the water for the ease of observation
Transparent material production resistant to high temperature, corresponding upper packer accessory 27 and lower packing on coal sample clamping device 1 are all made of with lower packer accessory 28
The position of part 28 is equipped with observation window.
Claims (9)
1. a kind of aqueous coal body de-plugging aptitude tests device, which is characterized in that including coal sample retained part, temperature acquisition control unit
Divide, steam condensing reflux part, medium infeed part, gas collection part, part of catchmenting；
The coal sample retained part includes coal sample clamping device (1), and coal sample clamping device (1) has closed accommodating cavity
The top of box-structure, box-structure is equipped with medium injection pipe (7), one end and coal sample clamping device (1) of medium injection pipe (7)
The top of closed accommodating cavity penetrate through connection, the bottom of box-structure is equipped with outlet pipe (32), one end of outlet pipe (32) with
The bottom of the closed accommodating cavity of coal sample clamping device (1) penetrates through connection；
The temperature acquisition control section includes electrical heat tracing liner (3), temperature transducer (5) and heating temperature control mechanism
(2)；Coal sample clamping device (1) inside of box-structure and electrical heat tracing liner (3) is arranged in electrical heat tracing liner (3)
Closed accommodating cavity around coal sample clamping device (1) is arranged；The thermometric end of temperature transducer (5) runs through the coal sample of box-structure
Clamping device (1) and the inside for stretching to closed accommodating cavity；Heating temperature control mechanism (2) include controller, heating control circuit,
Temperature feedback loop, controller are electrically connected with electrical heat tracing liner (3) and temperature transducer (5) respectively；
The water collecting part point includes catch basin (10)；
The steam condensing reflux part includes return tee joint shut-off valve (6), return pipe (8) and steam condenser pipe (9)；Reflux
The first port of three-way cut-off valve (6) is connect with the other end of medium injection pipe (7), the second end of return tee joint shut-off valve (6)
Mouth is connect with one end of return pipe (8), and the other end of return pipe (8) is connect with the steam input terminal of steam condenser pipe (9), steam
The condensation end of condenser pipe (9) is connect by pipeline with catch basin (10)；
It includes pressure indicator (14), medium injection three-way cut-off valve (11), water flux tester that the medium, which feeds part,
(13), water supply mechanism (12), pressure reducing valve (19) and gas injection pressure gas cylinder (20)；Medium injects the first end of three-way cut-off valve (11)
Mouth is connect by pressure indicator (14) and pipeline with the third port of return tee joint shut-off valve (6), and medium injects threeway cut-off
The second port of valve (11) is connect by water flux tester (13) and pipeline with water supply mechanism (12), and medium injects threeway cut-off
The third port of valve (11) is connect by pressure reducing valve (19) and pipeline with gas injection pressure gas cylinder (20)；
The gas collection part includes letting out valve door (15), moisture trap (16), water discharging valve (17), water volume flow rate record
Instrument (18), gas collection condenser pipe (22), collection air valve (21) and gas bottle (23)；Let out one end and outlet pipe (32) of valve door (15)
Other end connection, the other end for letting out valve door (15) connect with the input terminal of moisture trap (16), moisture trap (16)
Water route output end pass sequentially through water discharging valve (17) and water volume flow rate recorder (18) is connect with catch basin (10), air water point
Gas circuit output end from device (16) is connected to connection, the condensation of gas collection condenser pipe (22) with the gas circuit input terminal of gas collection condenser pipe (22)
Output end is connect by the pipeline connection between pipeline and water discharging valve (17) and water volume flow rate recorder (18), gas collection condensation
The gas circuit output end of pipe (22) is connect by collecting air valve (21) with gas bottle (23).
2. aqueous coal body de-plugging aptitude tests device according to claim 1, which is characterized in that the return tee joint is cut
Only valve (6) and medium injection three-way cut-off valve (11) are Electromagnetic Control three-way cut-off valves, and described lets out valve door (15), draining
Valve (17), collection air valve (21) and pressure reducing valve (19) are solenoid electric valves, and the water supply mechanism (12) is equipped with electrically-controlled valve
Door, the gas injection pressure gas cylinder (20) be equipped with electric control valve, the water flux tester (13), pressure indicator (14) and
Water volume flow rate recorder (18) all has data-out port；Aqueous coal body de-plugging aptitude tests device further includes electric control part
Point, electric control part includes industrial control computer, coal sample heating control circuit, water filling control loop, gas injection control loop sum number
According to output loop is calculated, industrial control computer is injected with heating temperature control mechanism (2), return tee joint shut-off valve (6), medium respectively
Three-way cut-off valve (11), the electric control valve of water supply mechanism (12), the electric control valve of gas injection pressure gas cylinder (20), pressure indicator
(14), valve door (15), water discharging valve (17), collection air valve (21), water flux tester (13), pressure reducing valve (19), water body are let out
Product flow registering instrument (18) electrical connection.
3. aqueous coal body de-plugging aptitude tests device according to claim 1 or 2, which is characterized in that the coal sample folder
Holding mechanism (1) includes coal sample sleeve (24), upper packer accessory (27), top cover labyrinth (25), lower packer accessory (28) and lower sealing cover
(26)；The inner surface upper and lower ends of coal sample sleeve (24) are equipped with installation internal screw thread, and the electrical heat tracing liner (3) surrounds
Outside in coal sample sleeve (24) is set；Upper packer accessory (27) and lower packer accessory (28) are the multi-diameter shaft knots of setting symmetrical above and below
Structure, stepped shaft structure include major diameter section and path section, the internal diameter cooperation of the outer diameter of major diameter section and coal sample sleeve (24),
And the major diameter section of upper packer accessory (27) and lower packer accessory (28) is oppositely arranged up and down, upper packer accessory (27) and lower packer accessory (28)
Major diameter section passes through seal washer (33) and coal sample sleeve (24) airtight connection respectively；Upper packer accessory (27) is equipped in axial direction
Through the medium injection channel and thermometric channel of upper packer accessory (27), the top and medium injection pipe (7) of medium injection channel are even
Lead to and connect, the top in thermometric channel is fixedly connected with temperature transducer (5)；Lower packer accessory (28), which is equipped with, in axial direction runs through
The bottom end of the exhalant canal of lower packer accessory (28), exhalant canal is connected to connection with outlet pipe (32)；Top cover labyrinth (25) and under it is close
Covering (26) is external thread sleeve structure symmetrical above and below, the path section of the internal diameter and stepped shaft structure of external thread sleeve structure
The installation dimension of inner screw thread of outer diameter cooperation, external screw thread and coal sample sleeve (24) cooperates, and the socket of external thread sleeve structure is mounted on
In the path section of stepped shaft structure and external thread sleeve structure is mounted on coal sample sleeve (24) by being threadedly engaged.
4. aqueous coal body de-plugging aptitude tests device according to claim 3, which is characterized in that the top of medium injection channel
The link position at end and medium injection pipe (7) is equipped with medium injection sealing element (30), the top in thermometric channel and temperature transducer
(5) link position is equipped with thermometric sealing element (29), and the bottom end of exhalant canal and the link position of outlet pipe (32) are equipped with water outlet
Seals (31).
5. aqueous coal body de-plugging aptitude tests device according to claim 3, which is characterized in that upper packer accessory (27) and under
The major diameter section end face of the stepped shaft structure of packer accessory (28) is equipped with the groove structure being recessed to path section direction.
6. aqueous coal body de-plugging aptitude tests device according to claim 5, which is characterized in that the rank of lower packer accessory (28)
Groove structure on terraced axle construction major diameter section end face small big conical socket structure under being arranged to.
7. aqueous coal body de-plugging aptitude tests device according to claim 3, which is characterized in that coal sample sleeve (24), on
Packer accessory (27) and lower packer accessory (28) are all made of transparent material production resistant to high temperature, correspond to and seal on coal sample clamping device (1)
The position of spacing body (27) and lower packer accessory (28) is equipped with observation window.
8. aqueous coal body de-plugging aptitude tests device according to claim 1 or 2, which is characterized in that the steam is cold
Solidifying pipe (9) sum aggregate gas condenser pipe (22) is straight cold finger.
9. a kind of test method of aqueous coal body de-plugging aptitude tests device, which is characterized in that specifically includes the following steps:
A. it chooses coal sample: taking bulk coal sample in coal seam to be tested, record coal measure strata temperature, then sealed package is transported to experiment
Room；
B. the production of coal core sample and installation: coal core is made according to the shape and size of coal sample clamping device (1) closed accommodating cavity
Sample (4), and by coal core sample (4) installation to coal sample clamping device (1) closed accommodating cavity in and be sealed；
C. the drying process of coal core sample: operation return tee joint shut-off valve (6) is in medium injection pipe (7) with return pipe (8)
Connected state is then turned on heating temperature control mechanism (2), by the Real-time Feedback of temperature transducer (5) that coal core sample (4) is slow
It is heated to 100 DEG C and keeps the temperature, until moisture is no longer precipitated in steam condenser pipe (9), is then shut off heating temperature control mechanism (2) and flows back
Three-way cut-off valve (6), stop heat and be gradually cooled to temperature it is constant until；
D. the water flood treatment of coal core sample: operation return tee joint shut-off valve (6) makes medium injection pipe (7) and pressure indicator (14)
Pipeline and water are logical where place pipeline is in connected state, operation medium injection three-way cut-off valve (11) makes pressure indicator (14)
Pipeline where tester (13) be in connected state, open water supply mechanism (12) to coal sample clamping device (1) internal water flooding, directly
To saturation, water injection pressure is observed by pressure indicator (14) during water filling, reads the numerical value and note of water flux tester (13)
Total water injection rate is recorded, return tee joint shut-off valve (6) and medium injection three-way cut-off valve (11) are then shut off；
E. the natural drainage processing of coal core sample: valve door (15), water discharging valve (17) sum aggregate air valve (21), coal core are let out in unlatching
Water in sample (4) is discharged into catch basin (10) under self gravitation effect through water volume flow rate recorder (18), and record gravity is made
Natural drainage amount under is then shut off until no longer draining and lets out valve door (15), water discharging valve (17) sum aggregate air valve
(21)；
F. the gas injection processing of coal core sample: heating temperature control mechanism (2) is reopened, and heating temperature is set as coal core sample
(4) the coal measure strata temperature in the coal seam to be tested where, heat preservation after heating is until temperature is constant；It is then turned on and lets out valve door
(15), water discharging valve (17) sum aggregate air valve (21), and operate return tee joint shut-off valve (6) and make medium injection pipe (7) and pressure
Pipeline where indicator (14) is in connected state, operation medium injection three-way cut-off valve (11) makes pressure indicator (14) place
Pipeline where pipeline and pressure reducing valve (19) is in connected state, and the pressure of pressure reducing valve (19) is set as where coal core sample (4)
Coal seam to be tested practical coal seam gas injection pressure after open gas injection pressure gas cylinder (20) and infused to inside coal sample clamping device (1)
Gas observes gas injection pressure by pressure indicator (14) during gas injection, and observation water volume flow rate recorder (18) is until air water point
Until not being then exhausted from water from device (16) sum aggregate gas condenser pipe (22) and record gas injection displacement；
G. sampled-data processing calculates output: successively closing heating temperature control mechanism (2), medium injection three-way cut-off valve (11), returns
Stream three-way cut-off valve (6) lets out valve door (15), water discharging valve (17) sum aggregate air valve (21), first calculates total water injection rate and nature
Then the difference of displacement calculates the ratio of gas injection displacement and the difference, using the ratio as assessment coal seam de-plugging ability
Index is compared in discharge.
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| CN201810403677.8A CN109001418B (en) | 2018-04-28 | 2018-04-28 | Device and method for testing plugging removal capability of hydrous coal body |
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| CN109001418B (en) | 2020-03-17 |
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