CN109612908A - Coal petrography porosity device and method is measured using adsorption curve - Google Patents
Coal petrography porosity device and method is measured using adsorption curve Download PDFInfo
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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Abstract
It the present invention relates to the use of adsorption curve measurement coal seam porosity apparatus and method, belong to test coal seam porosity equipment technical field.Coal sample is tested in the coal sample chamber of similar underground environment, using gas as measurement coal sample pore volume medium, similar coal-bed gas pressure is applied to heterogeneity gas, it is injected into test coal sample, since characterization of adsorption of the test coal sample to variety classes gas is different, air accumulator is caused to monitor that gas with various volume change is different, data are recorded according to the volume of gas with various, calculate coal sample pore volume and coal sample porosity, to solve the problems, such as the prior art to coal seam porosity measurement existing defects, measurement coal porosity accuracy is improved.
Description
Technical field
The utility model relates to coal petrography porosity measurement fields, more particularly to are filled using adsorption curve measurement coal petrography porosity
It sets and method.
Background technique
The porosity of coal is to characterize the important indicator of reservoir gas enrichment and extraction complexity, for evaluating mining area coal petrography
Gas resource is most important.It is pointed out by article " coal porosity study on determination method progress " in " energy technology and management " periodical: right
The measuring method of coal petrography porosity mainly has traditional measurement coal porosity method, mercury injection method measurement coal porosity and is based on CT skill
The coal porosity measuring method of art；Using traditional measurement coal porosity method, mechanism is close by measuring the dry block of coal
Degree and real density calculate porosity；Coal porosity is measured using mercury injection method, mechanism is that mercury is being injected coal using external pressure
Hole calculates coal porosity with indentation pressure and the intracorporal pore size relationship of coal；Using the coal hole based on CT technology
Rate measuring method, mechanism are that coal body is shot through by X-ray, calculate the density or gray scale Formation cross-section image of different cube fritters
Matrix goes out coal porosity by computer aided calculation；Coal porosity is measured using traditional measurement coal porosity and mercury injection method
It is easy to use easy to operate, coal porosity is measured using CT technology, measurement coal porosity data are very accurate.But tradition and pressure mercury
Measurement porosity method will cause the destruction of coal body pore structure, and coal body porosity error increases, and have ignored coal porosity change
Change the interaction between gas absorption；Using the measurement of CT technology, porosity method workload is excessive, cost is excessively high.Therefore,
To ensure to measure coal petrography porosity data accuracy, it is contemplated that the mutual pass between coal petrography porosity change and gas absorption
System, there is an urgent need to measure coal petrography porosity method and apparatus using adsorption curve, to realize the measurement new method of coal petrography porosity.
Utility model content
The purpose of the utility model is to overcome the prior arts to coal petrography porosity measurement defect, and existing test method used
It is easy to cause coal body aperture to destroy in journey, does not consider influence of the gas absorption to coal petrography porosity, thus lead to experimental data
The technical problem of correctness difference, the utility model provide that a kind of measurement is more accurate, reliability is higher utilizes adsorption curve
Coal petrography porosity apparatus and method are measured, the porosity of underground coal petrography is measured.
To achieve the above object, the utility model is achieved through the following technical solutions:
Utilize adsorption curve measure coal petrography porosity device, comprising: vacuum pump, constant pressure pump one, constant pressure pump two, topping-up pump,
Booster pump, gas tank one, gas tank two, coil pipe, insulating box, temperature measurer, pressurization plug, shell, air accumulator one, air accumulator two, tail gas tank,
Pressure reducing valve one~ten.Include coil pipe, coal sample chamber, shell, temperature measurer, pressure reducing valve three, pressurization plug in the insulating box；The coal sample
Pressure reducing valve three, coil pipe are sequentially connected on the left of chamber；Described coil pipe one end is connected by pressure reducing valve three with coal sample chamber, and the other end is divided into three
Branch is attached, and branch one: being connected with gas tank one, gas tank two, branch two: it is connected with constant pressure pump one, air accumulator one, branch
Three: being connected with vacuum pump；The gas tank one and gas tank two are in parallel, and are connected with coil pipe, and gas tank one and gas tank two are separately installed with
Pressure reducing valve one and pressure reducing valve two；The constant pressure pump one is connected with air accumulator one；One lower part of air accumulator is connected with constant pressure pump one,
Top gas outlet is connected with coil pipe, and pressure reducing valve four is equipped between shown air accumulator one and coil pipe；The vacuum pump and coil pipe
It is connected, and pressure reducing valve five is installed therebetween；It is connected on the right side of the coal sample chamber with air accumulator two, and is equipped with subtracts therebetween
Pressure valve eight；The air accumulator two is connected with coal sample chamber, tail gas tank, constant pressure pump two respectively, and the air accumulator two and coal sample chamber it
Between pressure reducing valve eight is installed, have the connection of pressure reducing valve nine, the air accumulator two and tail gas between the air accumulator two and constant pressure pump two
There is the connection of pressure reducing valve ten between tank；The temperature measurer is mounted on pressurization plug inside, and bottom is filled in pressurization in thermometric contact；It is described to add
Tamponade is installed on above coal sample chamber；The shell is installed on pressurization side beyond the Great Wall, and there is cavity therebetween, and the booster pump connects
The cavity being connected between shell and pressurization plug, and pressure reducing valve six is installed between the booster pump and cavity；The topping-up pump connects
The cavity being connected between shell and pressurization plug, and pressure reducing valve seven is installed between the topping-up pump and cavity.
Coal petrography porosity method is measured using adsorption curve: the use of booster pump and insulating box being coal sample according to the principle of similitude
Coal sample offer is provided in chamber and similarly descends stress loading and temperature environment, topping-up pump injects sealing fluid in cavity, prevents gas
Leakage carries out vacuum removal of impurities processing after detection experimental rig air-tightness is good to test coal sample using vacuum pump and uses gas tank one
Gas one and gas two are provided respectively with gas tank two, and high adsorption of the gas two in test coal sample is in gas one, between the two
Do not interact；Constant coal-bed gas pressure is applied to gas one and gas two respectively using constant pressure pump one, by with a scale
Air accumulator one measure the initial volume of gas one and gas two, gas one and gas two are after coil pipe constant temperature heating bath, gas
Body is sufficiently heated to the underground coal rock similar temperature of insulating box offer；First by two injection testing coal sample of gas, gas into
Enter to test in coal sample, portion gas two is adsorbed, and portion gas two is filled in test coal sample internal void, then will be with gas two
Have in the one injection testing coal sample of gas of identical initial volume, injection testing coal sample gas a volume of is equal to the absorption of gas two
The sum of amount and pore filling amount, carry out constant coal-bed gas pressure pressurization, gas storage to gas one and gas two using constant pressure pump two
Gas measures gas one and gas two-body accumulated amount after overtesting coal sample, passes through correlation under the conditions of level pressure fixed temperature in tank two
The volume data tested out can calculate the pore volume and porosity of test coal sample.
Therefore, the beneficial effects of the utility model are: (1) respectively proposes coal sample in coal sample chamber using booster pump and insulating box
For crustal stress load and temperature environment, other measurement methods are compared, it is contemplated that coal porosity variation and the phase between gas absorption
Mutual relation, the porosity determined also have more authenticity, credibility；(2) gas is used as measurement coal sample pore volume medium,
It is easy flowing in coal sample, is not easy to plug coal sample micro-pore structure, compares other measurement coal sample pore volume media, gas is to coal
Sample pore structure extent of the destruction is low, improves measurement coal petrography porosity accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure, 1-pressure reducing valve one, 2-pressure reducing valves two, 3-pressure reducing valves three, 4-pressure reducing valves four, 5-pressure reducing valves five, 6-
Pressure reducing valve six, 7-pressure reducing valves seven, 8-pressure reducing valves eight, 9-pressure reducing valves nine, 10-pressure reducing valves ten, 11-gas tanks one, 12-gas tanks
Two, 13-constant pressure pumps one, 14-vacuum pumps, 15-coil pipes, 16-insulating boxs, 17-coal sample chambers, 18-temperature measurers, 19-pressurizations
Plug, 20-air accumulators one, 21-shells, 22-topping-up pumps, 23-booster pumps, 24-air accumulators two, 25-constant pressure pumps two, 26-
Tail gas tank.
Specific embodiment
The utility model is described in detail with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, described in the utility model measure coal seam porosity using adsorption curve, it is by pressure reducing valve one~ten
1~10, gas tank 1, gas tank 2 12, constant pressure pump 1, vacuum pump 14, coil pipe 15, insulating box 16, coal sample chamber 17, temperature measurer
18, pressurization plug 19, air accumulator 1, shell 21, topping-up pump 22, booster pump 23, air accumulator 2 24, constant pressure pump 2 25, tail gas tank
26 compositions.
The use step of the utility model is specific as follows:
Step (1): producing suitable just size test coal sample, opens pressurization plug 19 and 21 top of shell, will test coal
Coal sample is put into coal sample chamber 17, closes pressurization plug 19 and 21 top of shell.
Step (2): opening pressure reducing valve 77, opens topping-up pump 22 to cavity and injects sealing fluid, closes pressure reducing valve 77；It opens
Pressure reducing valve 66 opens booster pump 23, after being forced into strata pressure, keeps pressure constant.
Step (3): open insulating box 16, keep calorstat temperature equal with subterranean coal temperature, keep temperature measurer temperature and
Temperature is constant equal in insulating box.
Step (4): opening pressure reducing valve 1 and pressure reducing valve 44, so that air accumulator 1 is stored gas one in constant pressure, closing subtracts
Pressure valve 1 opens constant pressure pump 1, opens pressure reducing valve 33, and observation one 20 graduation position of air accumulator does not change finally at any time
Become, illustrates to seal between 17 top of coal sample chamber pressurization plug 19 and shell 21, the test measurement of sample coal petrography porosity can be carried out.
Step (5): opening pressure reducing valve 55, opens vacuum pump 14 and carries out vacuum removal of impurities to coal sample, removes coal sample manufacturing process
Adsorbing contaminant and above-mentioned gas one influence, and after the completion of vacuum pump operation, close pressure reducing valve 33 and pressure reducing valve 55；Open pressure reducing valve
22 and pressure reducing valve 44, constant pressure pump 1 is opened, so that air accumulator 1 is stored certain volume gas two, and record air accumulator one
20 graduation position data are expressed as V1.Pressure reducing valve 22 is closed, pressure reducing valve 33 is opened, setting constant pressure pump 1 provides constant pressure
For pressure of coalbed gas, keep its pressure constant, when volume change is zero in air accumulator 1, piston position is not sent out
When raw change in location, volume total variation in its one 20 air chamber of air accumulator is measured, and record data V2。
Step (6): opening pressure reducing valve 88, when piston position is zero graduation in air accumulator 1, closes pressure reducing valve eight
8 open constant pressure pump 2 25 and provide pressure as coal-bed gas pressure, measure air accumulator with pressure reducing valve 33, opening pressure reducing valve 99
Gas volume amount in 2 24, and record data V3.Pressure reducing valve 10 is opened, is excluded in air accumulator 2 24 after gas two completely,
Close pressure reducing valve 10.
Step (7): closing pressure reducing valve 99, opens pressure reducing valve 1, and constant pressure pump 1 is made to provide pressure coal seam gas pressure
Power, until one volume of gas in air accumulator 1 and two volume data V of above-mentioned gas1When equal, pressure reducing valve 1 is closed, is opened
Then pressure reducing valve 33 makes to open the offer constant pressure pressure of coalbed gas of constant pressure pump 1.
Step (8): opening pressure reducing valve 88, until piston position is that above-mentioned gas two records data V in air accumulator 12
When, pressure reducing valve 33 is closed, pressure reducing valve 99 is opened, opening constant pressure pump 2 25 and providing pressure is coal-bed gas pressure, measures storage
Gas a volume of in gas tank 2 24, is recorded as data V4.Pressure reducing valve 88 is closed, pressure reducing valve 10 is opened, exclusion gas storage completely
Gas one in tank 2 24 closes pressure reducing valve 99 and pressure reducing valve 10, closes constant pressure pump 2 25.
Step (9): according to the data of above-mentioned record, coal sample pore volume V and coal sample porosity can be obtainedIt can be under
Column formula is calculated.
V=V1-V3-V4
In formula:For coal sample porosity；V is coal sample pore volume, m3；VsFor coal sample total volume, m3；V1、V3、V4It is above-mentioned
The gas volume amount measured in step, m3。
Claims (5)
1. using adsorption curve measure coal petrography porosity apparatus and method, it is characterised in that: by pressure reducing valve one~ten, gas tank one,
Gas tank two, constant pressure pump one, vacuum pump, coil pipe, insulating box, coal sample chamber, temperature measurer, pressurization plug, air accumulator one, shell, topping-up pump,
Booster pump, air accumulator two, constant pressure pump two, tail gas tank composition；The gas tank one and gas tank two are in parallel, and are connected with coil pipe, gas tank
One and gas tank two be separately installed with pressure reducing valve one and pressure reducing valve two；Be connected on the right side of the coal sample chamber with air accumulator two, and the two it
Between pressure reducing valve eight is installed；The air accumulator two is connected with coal sample chamber, tail gas tank, constant pressure pump two respectively；The air accumulator two with
Pressure reducing valve eight is installed between coal sample chamber；There is the connection of pressure reducing valve nine between the air accumulator two and constant pressure pump two；The air accumulator
There is the connection of pressure reducing valve ten between two and tail gas tank；The booster pump is connected to the cavity between shell and pressurization plug, and the increasing
Pressure reducing valve six is installed between press pump and cavity；Topping-up pump be connected to shell and pressurization plug between cavity and the topping-up pump with
Pressure reducing valve seven is installed between cavity.
2. according to claim 1 measure coal petrography porosity apparatus and method using adsorption curve, it is characterised in that: described
Include coil pipe, coal sample chamber, shell, temperature measurer, pressure reducing valve three, pressurization plug in insulating box.
3. according to claim 1 measure coal petrography porosity apparatus and method using adsorption curve, it is characterised in that: described
Pressure reducing valve three, coil pipe are sequentially connected on the left of coal sample chamber；Described coil pipe one end is connected by pressure reducing valve three with coal sample chamber, the other end point
It being attached at three branches, branch one: being connected with gas tank one, gas tank two, branch two: being connected with constant pressure pump one, air accumulator one,
Branch three: it is connected with vacuum pump.
4. according to claim 1 or 2 measure coal petrography porosity apparatus and method using adsorption curve, it is characterised in that:
The temperature measurer is mounted on pressurization plug inside, and bottom is filled in pressurization in thermometric contact；The pressurization plug is installed on above coal sample chamber；
The pressurization shell of side's installation beyond the Great Wall is detachable, and there is cavity therebetween.
5. according to claim 1 or 3 measure coal petrography porosity apparatus and method using adsorption curve, it is characterised in that:
The constant pressure pump one is connected with air accumulator one；One lower part of air accumulator is connected with constant pressure pump one, top gas outlet and coil pipe phase
Even, and pressure reducing valve four is installed between shown air accumulator one and coil pipe；The vacuum pump is connected with coil pipe, and installation therebetween
Pressure reducing valve five.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015101.9A CN109612908A (en) | 2019-01-08 | 2019-01-08 | Coal petrography porosity device and method is measured using adsorption curve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910015101.9A CN109612908A (en) | 2019-01-08 | 2019-01-08 | Coal petrography porosity device and method is measured using adsorption curve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122417A (en) * | 2020-02-22 | 2020-05-08 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| RU2796085C1 (en) * | 2022-09-23 | 2023-05-16 | Автономная некоммерческая образовательная организация высшего образования "Сколковский институт науки и технологий" | Installation for measuring volume change of solid materials of organic and inorganic nature and method of carrying out such measurements |
-
2019
- 2019-01-08 CN CN201910015101.9A patent/CN109612908A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122417A (en) * | 2020-02-22 | 2020-05-08 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| CN111122417B (en) * | 2020-02-22 | 2022-06-21 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| RU2796085C1 (en) * | 2022-09-23 | 2023-05-16 | Автономная некоммерческая образовательная организация высшего образования "Сколковский институт науки и технологий" | Installation for measuring volume change of solid materials of organic and inorganic nature and method of carrying out such measurements |
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Application publication date: 20190412 |