CN102998204B - Device and method for preparing water-containing coal sample and testing adsorption - Google Patents
Device and method for preparing water-containing coal sample and testing adsorption Download PDFInfo
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- CN102998204B CN102998204B CN201210558218.XA CN201210558218A CN102998204B CN 102998204 B CN102998204 B CN 102998204B CN 201210558218 A CN201210558218 A CN 201210558218A CN 102998204 B CN102998204 B CN 102998204B
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Abstract
The invention discloses a device and a method for preparing a water-containing coal sample and testing adsorption. The device mainly consists of a sample room, a reference room, a control valve, a pressure transmitter, an air injection pump, a data collection card, a collection terminal, a filter and a thermostatic water bath. According to the device and the method for preparing the water-containing coal sample and testing the adsorption, the preparation of the water-containing coal sample can be realized by stimulating a coal bed ground water pressure-bearing environment, and the air adsorbing capacity testing can be carried out, wherein the method comprises the following steps of: carrying out vacuumizing on a system, injecting ground water sample by vacuum suction of the system, ensuring that the coal sample is submerged in the ground water, injecting helium into the system by the air injection pump, and enabling a pore water pressure of the coal sample to reach a ground water pressure; converging superfluous water of the coal sample to the bottom of the sample room under the effect of gravity, and discharging the superfluous water under the effect of an air pressure to finish the preparation of the coal sample; and after carrying out vacuumizing on the system, injecting adsorbed air into the reference room by the air injection pump, controlling classification and injecting the air into the sample room through the valve, after the adsorption is balanced, counting the adsorbing capacity. According to the device and the method for preparing the water-containing coal sample and the testing adsorption, the structure is simple, the operation is convenient, and the application prospect is wide.
Description
Technical field
The present invention relates to a kind of moisture coal sample preparation and adsorption measuring device and method, belong to porous medium physical and chemical adsorption technical field of measurement and test, the sample preparation and the gas absorption that contain aqueous water coal sample under being particularly useful for simulating great burying geologic condition measure examination.
Background technology
In cbm development process, the adsorptive power of coal to gas carries out one of Reserves Evaluation, the basis of rationally carrying out coal-bed gas exploitation.Research shows: in coal, gas is based on ADSORPTION STATE, affects by reservoir environment, and various gas is in competitive Adsorption state.Practical simulation reservoir environment, considering various effect of complicate factor is evaluate coal measures examination key to gas absorption.In reality, burying in darker coal seam, after underground water enters coal seam, before drainage and step-down exploitation, the pressure of aqueous water is comparatively large, and this part water can overcome surface tension and enter in micro-pore, has an impact to gas absorption.
At present, prepared by the many modes by Vapor adsorption or immersion aqueous water of preparation of moisture coal, in moisture coal sample obtained by this mode and real coal seam reservoir, the form of water has larger difference, experimental result also will depart from reality, not reflect that in real coal seam, aqueous water affects gas absorption.The adsorption instrument that current test adopts also only is measured for adsorbance mostly, and do not have the preparation of simulation reservoir characteristics containing aqueous water coal sample function, this causes great trouble to experiment.For the problems referred to above, be necessary to design and a kind ofly can simulate the preparation of coal seam reservoir characteristics and to go forward side by side the equipment that line correlation gas absorption measures containing aqueous water coal sample.
Summary of the invention
Technical matters: the object of the invention is the deficiency overcome in prior art, provides that a kind of structure is simple, easy to operate, Real-time Collection, good stability, measurement efficiency and the high coal seam reservoir characteristics preparation of can simulating of precision to go forward side by side the apparatus and method that line correlation gas absorption measures containing aqueous water coal sample.
Technical scheme: moisture coal sample preparation of the present invention and absorption proving installation, comprise acquisition terminal, constant temperature water bath, sample chamber, reference chamber, reference pressure chamber transmitter, sample chamber pressure unit, gas injection pump, data collecting card, reference chamber gas outlet, stopple coupon, sample preparation drainpipe, filtrator; Described reference chamber top connects reference pressure chamber transmitter, gas injection pump and reference chamber gas outlet respectively through four-way, and the pipeline connecting gas injection pump is provided with air intake control valve, and reference chamber gas outlet is provided with reference pressure chamber operation valve; Described top, sample chamber connects the bottom of sample chamber pressure unit, stopple coupon and reference chamber respectively through four-way, stopple coupon is provided with sampling operation valve, and the pipeline connecting the bottom of reference chamber is provided with absorption and control valve; The bottom of described sample chamber connects sample preparation drainpipe, and sample preparation drainpipe is provided with sample preparation draining control valve; Described reference pressure chamber transmitter, sample chamber pressure unit are connected with acquisition terminal through data collecting card respectively; Described sample chamber, reference chamber, sample preparation draining control valve, absorption and control valve, reference pressure chamber operation valve, sampling operation valve, air intake control valve are placed in constant temperature water bath.
Described sample chamber, reference chamber are vertically settled, and be and form funnelform taper or circle bottom it; Filtrator is provided with sample preparation drainpipe junction bottom described sample chamber.
Utilize said apparatus to realize the method measured containing the preparation of aqueous water coal sample and gas absorption, comprise the steps:
A, coal sample is put into sample chamber, open sample preparation draining control valve, absorption and control valve, connect vacuum pump from sample preparation drainpipe, process is vacuumized to system, after having vacuumized, close sample preparation draining control valve, absorption and control valve;
B, open sampling operation valve and slowly suck sampling of ground water from stopple coupon, when flooding the coal sample in sample chamber when volume of water sample, close sampling operation valve, record sucks the volume of water sample of sample chamber;
C, open air intake control valve, absorption and control valve, helium is entered by gas injection infusion, the pressure of helium increases to the groundwater pressure of required simulated formation, leaves standstill a period of time, closes air intake control valve, open sample preparation draining control valve, in sample chamber, unnecessary water sample under gravity, is pooled to bottom sample chamber, depresses at gas, discharged by sample preparation drainpipe, the volume of water discharged in record;
After d, discharge excessive moisture, close air intake control valve, sample preparation draining control valve, absorption and control valve, connect vacuum pump from reference chamber gas outlet and process is vacuumized to reference chamber, vacuumizing in processing procedure, be interrupted and open absorption and control valve, to remove the helium in sample chamber;
E, vacuumized after, close absorption and control valve, reference pressure chamber operation valve, complete and prepare containing aqueous water coal sample;
F, use gas injection pump inject required adsorbed gas of measuring in reference chamber, and the gaseous tension in record reference chamber, opens absorption and control valve, adsorbed gas is injected in sample chamber, record sample chamber change value of pressure, after pressure equilibrium upon adsorption, carries out the measurement of next stage pressure adsorption.
If desired reduce coal sample water percentage further, open air intake control valve, adopt gas injection pump, constantly pass into dry helium gas through reference chamber to sample chamber, make dry helium gas carry sample chamber coal sample steam and discharge from sample preparation drainpipe;
If need accelerate water percentage changing down, open air intake control valve, constantly pass into dry helium gas by gas injection pump through reference chamber to sample chamber, dry helium gas improves constant temperature water bath temperature carrying coal sample steam in sample chamber from the process that sample preparation drainpipe is discharged;
When carrying out mixed gas sorption measurement and needing collected specimens room gas to carry out component analysis, carry out gas sample by stopple coupon.
Beneficial effect: the present invention can simulate coalbed methane reservoir underground water pressure-bearing history, that prepares reflection reservoir environment feature contains aqueous water coal sample, and promoting the circulation of qi body adsorbance of going forward side by side is tested, and realizes sample preparation integrated with absorption measuring process, pressure change adopts and automatically detects, and automaticity is high.Its structure and method is simple, easy to operate, and purposes is wide, practical, with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is moisture coal sample preparation of the present invention and adsorption measuring device structural representation.
In figure: 1-sample chamber; 2-reference chamber; 3-sample preparation draining control valve; 4-absorption and control valve; 5-reference pressure chamber operation valve; 6-samples operation valve; 7-reference pressure chamber transmitter; 8-sample chamber pressure unit; 9-air intake control valve; 10-gas injection pump; 11-data collecting card; 12-acquisition terminal; 13-reference chamber gas outlet; 14-stopple coupon; 15-sample preparation drainpipe; 16-filtrator; 17-constant temperature water bath.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Moisture coal sample preparation of the present invention and adsorption measuring device primarily of sample chamber 1, reference chamber 2, sample preparation draining control valve 3, absorption and control valve 4, reference pressure chamber variable valve 5, sample operation valve 6, reference pressure chamber transmitter 7, sample chamber pressure unit 8, air intake control valve 9, gas injection pump 10, data collecting card 11, acquisition terminal 12, reference chamber gas outlet 13, stopple coupon 14, sample preparation drainpipe 15, filtrator 16, constant temperature water bath 17 form.Described sample chamber 1, reference chamber 2 are vertically settled, and are taper or circle bottom it, form funnel-form; Filtrator 16 is provided with sample preparation drainpipe junction bottom described sample chamber 1.Reference chamber 2 top connects gas injection pump 10, reference pressure chamber transmitter 7, reference chamber gas outlet 13 respectively through four-way, and the pipeline connecting gas injection pump 10 is provided with air intake control valve 9, and reference chamber gas outlet 13 is provided with reference pressure chamber operation valve 5; Described top, sample chamber 1 connects the bottom of sample chamber pressure unit 8, stopple coupon 14 and reference chamber 2 respectively through four-way, stopple coupon 14 is provided with sampling operation valve 6, and the pipeline connecting the bottom of reference chamber 2 is provided with absorption and control valve 4; The bottom of described sample chamber 1 connects sample preparation drainpipe 15, and connecting interface place settles filtrator 16, and sample preparation drainpipe 15 is provided with sample preparation draining control valve 3; Described reference pressure chamber transmitter 7, sample chamber pressure unit 8 are connected with acquisition terminal 12 through data collecting card 11 respectively; Described sample chamber 1, reference chamber 2, sample preparation draining control valve 3, absorption and control valve 4, reference pressure chamber operation valve 5, sampling operation valve 6, air intake control valve 9 are placed in constant temperature water bath 17.
Moisture coal sample preparation of the present invention and adsorption test method:
Moisture coal sample preparation: coal sample is put into sample chamber 1, open sample preparation draining control valve 3, absorption and control valve 4, connect vacuum pump from sample preparation drainpipe 15, process is vacuumized to system, after having vacuumized, sample preparation draining control valve 3, absorption and control valve 4 are closed; Open sampling operation valve 6 and slowly suck sampling of ground water from stopple coupon 14, when volume of water sample floods the coal sample in sample chamber 1, close sampling operation valve 6, record sucks the volume of water sample of sample chamber 1; Open air intake control valve 9, absorption and control valve 4, inject helium by gas injection pump 10, the pressure of helium increases to the groundwater pressure of required simulated formation, leaves standstill after 24 hours, closes air intake control valve 9; Open sample preparation draining control valve 3, in sample chamber 1, unnecessary water sample is pooled to bottom sample chamber 1 under gravity, and in gas pressure, discharged by sample preparation drainpipe 15, the volume of water discharged in record; After discharging excessive moisture, close air intake control valve 9, sample preparation draining control valve 3, absorption and control valve 4, connect vacuum pump from reference chamber gas outlet 13 and application of vacuum is carried out to reference chamber 2, in vacuum, open absorption and control valve 4 every 30 minutes and continue 5 minutes, continue 10 times, remove the helium in sample chamber 1.After having vacuumized, close absorption and control valve 4, reference pressure chamber operation valve 5, complete and prepare containing aqueous water coal sample;
The unnecessary water sample of coal sample to be pooled under gravity bottom sample chamber 1 and to be discharged completely by sample preparation drainpipe 15, if desired coal sample water percentage is reduced further, open air intake control valve 9, adopt gas injection pump 10, constantly dry helium gas is passed into sample chamber 1 through reference chamber 2, make dry helium gas carry sample chamber 1 coal sample steam to discharge from sample preparation drainpipe 15, pass in helium process and improve constant temperature water bath 17 temperature.
Adsorbance is measured: in reference chamber 2, inject required adsorbed gas of measuring with gas injection pump 10, record reference chamber gaseous tension.Open absorption and control valve 4, in sample chamber 1, inject adsorbed gas, record sample chamber change value of pressure, after waiing upon adsorptive pressure balance, carries out the measurement of next stage pressure adsorption.Carry out mixed gas sorption measurement when needing collected specimens room gas to carry out component analysis, carry out gas sample by stopple coupon 14.
Claims (1)
1. a moisture coal sample preparation and absorption proving installation, comprise acquisition terminal (12), constant temperature water bath (17), it is characterized in that: also comprise sample chamber (1), reference chamber (2), reference pressure chamber transmitter (7), sample chamber pressure unit (8), gas injection pump (10), data collecting card (11), reference chamber gas outlet (13), stopple coupon (14), sample preparation drainpipe (15), filtrator (16); Described reference chamber (2) top connects reference pressure chamber transmitter (7), gas injection pump (10) and reference chamber gas outlet (13) respectively through four-way, the pipeline connecting gas injection pump (10) is provided with air intake control valve (9), and reference chamber gas outlet (13) is provided with reference pressure chamber operation valve (5); Described sample chamber (1) top connects the bottom of sample chamber pressure unit (8), stopple coupon (14) and reference chamber (2) respectively through four-way, stopple coupon (14) is provided with sampling operation valve (6), and the pipeline connecting the bottom of reference chamber (2) is provided with absorption and control valve (4); The bottom of described sample chamber (1) connects sample preparation drainpipe (15), and sample preparation drainpipe (15) is provided with sample preparation draining control valve (3); Described reference pressure chamber transmitter (7), sample chamber pressure unit (8) are connected with acquisition terminal (12) through data collecting card (11) respectively; Described sample chamber (1), reference chamber (2), sample preparation draining control valve (3), absorption and control valve (4), reference pressure chamber operation valve (5), sampling operation valve (6), air intake control valve (9) are placed in constant temperature water bath (17); Described sample chamber (1), reference chamber (2) are vertically settled, and be and form funnelform taper or circle bottom it; Described bottom, sample chamber (1) is provided with filtrator (16) with sample preparation drainpipe junction.
2. use the moisture coal sample preparation of device described in claim 1 and adsorb a method of testing, it is characterized in that, comprise the steps:
A, coal sample is put into sample chamber (1), open sample preparation draining control valve (3), absorption and control valve (4), connect vacuum pump from sample preparation drainpipe (15), process is vacuumized to system, after having vacuumized, sample preparation draining control valve (3), absorption and control valve (4) are closed;
B, open sampling operation valve (6) slowly suck sampling of ground water from stopple coupon (14), when volume of water sample floods the coal sample in sample chamber (1), close sampling operation valve (6), record suck sample chamber (1) volume of water sample;
C, open air intake control valve (9), absorption and control valve (4), helium is injected by gas injection pump (10), the pressure of helium increases to the groundwater pressure of required simulated formation, leaves standstill a period of time, closes air intake control valve (9), open sample preparation draining control valve (3), in sample chamber (1), unnecessary water sample under gravity, is pooled to bottom, sample chamber (1), depresses at gas, discharged by sample preparation drainpipe (15), the volume of water discharged in record;
After d, discharge excessive moisture, close air intake control valve (9), sample preparation draining control valve (3), absorption and control valve (4), connect vacuum pump from reference chamber gas outlet (13) and process is vacuumized to reference chamber (2), vacuumizing in processing procedure, be interrupted and open absorption and control valve (4), to remove the helium in sample chamber (1);
E, vacuumized after, close absorption and control valve (4), reference pressure chamber operation valve (5), complete and prepare containing aqueous water coal sample;
F, the adsorbed gas of measuring needed for injection in reference chamber (2) with gas injection pump (10); gaseous tension in record reference chamber (2); open absorption and control valve (4); adsorbed gas is injected in sample chamber (1); record sample chamber (2) change value of pressure; after pressure equilibrium upon adsorption, carry out the measurement of next stage pressure adsorption;
If desired coal sample water percentage is reduced further; open air intake control valve (9); adopt gas injection pump (10), constantly pass into dry helium gas through reference chamber (2) to sample chamber (1), make dry helium gas carry sample chamber (1) coal sample steam and discharge from sample preparation drainpipe (15);
If water percentage changing down need be accelerated; open air intake control valve (9); constantly pass into dry helium gas through reference chamber (2) to sample chamber (1) by gas injection pump (10), dry helium gas improves constant temperature water bath (17) temperature carrying coal sample steam in sample chamber (1) from the process that sample preparation drainpipe (15) is discharged;
When carrying out mixed gas sorption measurement and needing collected specimens room gas to carry out component analysis, carry out gas sample by stopple coupon (14).
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| CN201210558218.XA CN102998204B (en) | 2012-12-20 | 2012-12-20 | Device and method for preparing water-containing coal sample and testing adsorption |
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| CN102998204B true CN102998204B (en) | 2015-01-21 |
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| CN103245539B (en) * | 2013-04-22 | 2015-04-22 | 河南理工大学 | Manufacturing method of coal samples with different water contents |
| CN103604663B (en) * | 2013-10-31 | 2016-01-20 | 中国水利水电建设工程咨询西北有限公司 | A kind of water quality monitoring sample save set |
| CN103994912B (en) * | 2014-05-11 | 2016-10-19 | 中国矿业大学 | A kind of immersion method keeping coal sample structural intergrity |
| CN104697838B (en) * | 2015-03-27 | 2017-09-05 | 河南理工大学 | A kind of coal sample water filling device of laboratory simulation colliery scene high pressure water injection |
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| CN106198296A (en) * | 2015-06-01 | 2016-12-07 | 中国人民解放军63971部队 | A kind of DMMP concentration determination method |
| CN105021493B (en) * | 2015-07-13 | 2017-11-28 | 中国石油大学(华东) | A kind of absorption analysis method and device of multicomponent gas |
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