CN105156094A - Simulation test apparatus for migration of coal powder produced during production of coalbed methane well - Google Patents
Simulation test apparatus for migration of coal powder produced during production of coalbed methane well Download PDFInfo
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Abstract
The invention discloses a simulation test apparatus for migration of coal powder produced during production of a coalbed methane well and belongs to the field of coalbed methane mining. In the apparatus, an outlet line of a constant-flux pump (13) is serially connected with a backpressure valve (14) and an electromagnetic flowmeter (16) and is then communicated with an upper cavity of a piston stirring container (1), a lower cavity of the piston stirring container (1) is communicated with an axial inlet of a core holder (5); the inlet of the core holder (5) is provided with a pressure sensor I (4), and an outlet line is disposed in a container on a balance (11); two ends of an electromagnetic valve (7) are connected with an air compressor (6) and a liquid booster pump (8), respectively, and an outlet of the liquid booster pump (8) is communicated with an annular pressure inlet of the core holder (5). The apparatus further comprises an electrical control and monitor system used for monitoring and for controlling. The apparatus is capable of testing migration and clogging of coalbed fluid and coal powder in the mining process of coalbed methane. The apparatus has high pressure control and flow control precision, has low pressure and flow fluctuation and is easy to install and simple to operate.
Description
Technical field
The present invention relates to a kind of experimental rig in the migration of experiment lab simulation coal dust, particularly relate to a kind of coal bed gas well mining output coal dust transported simulation experimental rig, belong to coal-bed gas exploitation field.
Background technology
Along with the development of Chinese national economy, the supply of traditional energy reduces gradually, and the greenhouse effect serious threat that the great amount of carbon dioxide of discharging in productive life produces is to whole natural ecological safety, the mankind are increasing to demand that is novel, clean energy resource, and thus coal bed gas, clean energy resource novel as one receives extensive concern.China has abundant coal bed gas resource, cbm development to the nervous present situation of alleviation China petroleum resources, alleviate mine disaster degree, to reduce greenhouse gas emission etc. significant.Comparatively large through statistics Southern Qinshui Basin part coal bed gas well coal dust output, average pump detection period is 6 months, and pump detection and workover dynamically has a negative impact to gas well liquid loading frequently, too increases the mining cost of coal bed gas simultaneously.One of research core difficult problem having become cbm development technology of coal dust migration rule, determines significant to the science of coal seam reservoirs protection and manufacturing parameter.But current coal dust source etc. it be unclear that, and in coal bed gas well mining process, the study mechanism of output coal dust has no report, seriously hinder the enforcement of coal dust control and effective mining management and control.
Given this, in test lab simulation coal seam reservoirs confined pressure condition, realizing the migration process of the test of coal seam fluid and coal dust in coal-bed gas exploitation process, to the migration rule of studying coal powder, there is important theory directive significance, for instructing the production operation of coal bed gas, there is actual directive significance.
Summary of the invention
In order to solve the problem, the invention provides a kind of coal bed gas well mining output coal dust transported simulation experimental rig, under this device can complete coal seam confined pressure environment, the migration of coal seam fluid and coal dust and clogging test in coal-bed gas exploitation process, obtain flow, flow velocity, the pressure degradation experimental data of coal dust under test conditions, and obtain migration and the clogging test result of final coal seam fluid and coal dust.This device pressure control, flow control accuracy of measurement are high, and pressure, flowed fluctuation are little, data display accurately, directly perceived, and compact conformation, be convenient to control, easily install, simple to operate.
In order to achieve the above object, coal bed gas well mining output coal dust transported simulation experimental rig, comprise piston stirred vessel, core holding unit, air compressor machine, electromagnetic valve, liquid booster pump, balance, constant-flux pump, counterbalance valve, electromagnetic flowmeter and electrical control and monitoring system, the inlet tube crossing of described constant-flux pump is placed in container III, be communicated with the epicoele of piston stirred vessel after export pipeline is connected in series counterbalance valve, electromagnetic flowmeter successively, the cavity of resorption of piston stirred vessel is communicated with the axial entrance of core holding unit; The axis outlet line portals of core holding unit is placed in container II, and the axial inlet pipeline of core holding unit is provided with pressure sensor I, and container II is placed on balance; Electromagnetic valve two ends are connected with air compressor machine and liquid booster pump respectively, and the inlet tube crossing of liquid booster pump is placed in container I, the inlet communication of outlet and core holding unit ring pressure, and the outlet crossing of core holding unit ring pressure is placed in container I; Described electrical control and monitoring system are made up of electrical equipment and control software design;
Further, the export pipeline of constant-flux pump is provided with valve, the export pipeline of electromagnetic flowmeter is provided with valve, piston stirred vessel epicoele inlet ductwork is provided with valve, between piston stirred vessel cavity of resorption and pressure sensor I, connecting line is provided with valve, the inlet ductwork and export pipeline of core holding unit are respectively equipped with valve, the connecting line of liquid booster pump and core holding unit ring pressure are provided with valve, the export pipeline of core holding unit ring pressure is provided with valve;
Further, described piston stirred vessel comprises container cartridge, piston and agitator, and piston is placed in container cartridge, the dead in line of its axis and container cartridge, and agitator is connected with bottom the cavity of resorption of container cartridge;
Further, experimental rig also comprises piston stirred vessel for subsequent use, the epicoele of two piston stirred vessels and the pipeline parallel communication with constant-flux pump outlet, cavity of resorption and the pipeline parallel communication be communicated with core holding unit axial inlet; The epicoele inlet ductwork of piston stirred vessel for subsequent use is provided with valve, and between its cavity of resorption and pressure sensor I, connecting line is provided with valve;
Further, the pipeline between counterbalance valve and electromagnetic flowmeter is provided with pressure sensor II;
Further, be respectively equipped with in the bottom of two piston stirred vessel cavity of resorptions and connect open to atmosphere pipeline, pipeline is respectively equipped with valve;
Further, all described valves are one way valve.
The present invention is by filling test specimen with core holding unit, increased the confined pressure simulation coal seam high pressure of core holding unit to injected media in the annular space of core holding unit by liquid booster pump, the environment of sealing, add to press in core holding unit to piston stirred vessel epicoele injected media by constant-flux pump and inject water coal mixtures (being suspended thing), take into account balance by pressure sensor and Electromagnetic Flow directly to record or convert experimental data, and collect effluent fluid, in order to detecting the composition of effluent fluid, achieve coal seam fluid and the migration of coal dust and the test of silting in simulation coal-bed gas exploitation process, obtain the flow of coal dust under test conditions, flow velocity, pressure degradation experimental data, and obtain migration and the clogging test result of final coal seam fluid and coal dust.This device pressure control, flow control accuracy of measurement are high, and pressure, flowed fluctuation are little, data display accurately, directly perceived, and compact conformation, be convenient to control, easily install, simple to operate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, piston stirred vessel, 2, agitator, 3-1 ~ 3-13, valve, 4, pressure sensor I, 5, core holding unit, 6, air compressor machine, 7, electromagnetic valve, 8, liquid increases pump, 9, container I, 10, container II, 11, balance, 12, container III, 13, constant-flux pump, 14, counterbalance valve, 15, pressure sensor II, 16, electromagnetic flowmeter.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, comprise piston stirred vessel 1, core holding unit 5, air compressor machine 6, electromagnetic valve 7, liquid booster pump 8, balance 11, constant-flux pump 13, counterbalance valve 14, electromagnetic flowmeter 16 and electrical control and monitoring system, the inlet tube crossing of described constant-flux pump 13 is placed in container III12, export pipeline is communicated with the epicoele of piston stirred vessel 1 after being connected in series counterbalance valve 14, electromagnetic flowmeter 16 successively, and the cavity of resorption of piston stirred vessel 1 is communicated with the axial inlet of core holding unit 5; The axis outlet line portals of core holding unit 5 is placed in container II10, and the axial inlet pipeline of core holding unit 5 is provided with pressure sensor I4, and container II10 is placed on balance 11, and balance 11 is high-precision electronic balance; Electromagnetic valve 7 two ends are connected with air compressor machine 6 and liquid booster pump 8 respectively, and the inlet tube crossing of liquid booster pump 8 is placed in container I9, the inlet communication of outlet and core holding unit 5 ring pressure, and the outlet crossing of core holding unit 5 ring pressure is placed in container I9; Described electrical control and monitoring system are made up of the electrical equipments such as Industrial Personal Computer (IPC), display and transmission device table, high-speed camera, power distribution circuit and control software design.
The diameter of described core holding unit 5 is 50mm, length is that 50 ~ 200mm is adjustable, outside employing 316L steel making, inner sample room adopts gum cover manufacture, gum cover two ends are sealed by the steel cushion block identical with its internal diameter respectively, and be finally enclosed within the gum cover outside two cushion blocks respectively with O type circle, the space between gum cover and core holding unit 5 outer wall is annular space, by realizing increasing confined pressure to the inner injected media of annular space, core holding unit is fixed on the support of employing 316L steel making; Maximum working pressure in the sample room of core holding unit 5 is 16MPa; The injection range of flow of described constant-flux pump 13 is 0-30ml/min, and maximum working pressure is 16MPa; The capacity of described piston stirred vessel 1 is 5L, and maximum working pressure is 16MPa; Described air compressor machine 6 and the pressure limit of liquid booster pump 8 are 0-20MPa; Described pressure sensor I4 and the precision of counterbalance valve 14 are 0.4 grade, and the precision of described electromagnetic flowmeter 16 is 0.2 grade; Diameter for the coal column tested is 50mm, and length is that 50 ~ 200mm is adjustable.
The major function of electrical control and monitoring system is: 1. to the distribution of electric fixtures, the safeguard protection of whole experimental rig and warning etc.; 2. the pressure, flow etc. of whole simulation test device are gathered, store, process and shown, possess integrated console Long-distance Control and Non-follow control two kinds of patterns on the spot simultaneously; 3. video monitoring is carried out, with safeguards system safety to state beyond core holding unit 5.Whole experiment process is set as automatically completing by man-machine interface or manual intervention completes, and experimental data can save as specific data form, and realizes report generation, printing.
The export pipeline of constant-flux pump 13 is provided with valve 3-1, the export pipeline of electromagnetic flowmeter is provided with valve 3-2, piston stirred vessel 1 epicoele inlet ductwork is provided with valve 3-3, between piston stirred vessel 1 cavity of resorption and pressure sensor I4, connecting line is provided with valve 3-4, the inlet ductwork and export pipeline of core holding unit 5 are respectively equipped with valve 3-8 and valve 3-11, the connecting line of liquid booster pump 8 and core holding unit 5 ring pressure is provided with valve 3-9, the export pipeline of core holding unit 5 ring pressure is provided with valve 3-10; Whether all valves are used for fluid in Control experiment device and circulate.
Described piston stirred vessel 1 comprises container cartridge, piston and agitator 2, piston is placed in container cartridge, the dead in line of its axis and container cartridge, agitator 2 is connected with bottom the cavity of resorption of container cartridge, before on-test, the test water coal mixtures (suspension) configured is loaded in the cavity of resorption of piston stirred vessel 1, in process of the test, motor by turn on agitator 2 carries out stirring the bottom preventing coal dust to be deposited on piston stirred vessel, the precision of impact test.
Experimental rig also comprises the epicoele of another piston stirred vessel for subsequent use 1, two piston stirred vessels 1 and the pipeline parallel communication with constant-flux pump 13 outlet, cavity of resorption and the pipeline parallel communication be communicated with core holding unit 5 axial inlet; The epicoele inlet ductwork of piston stirred vessel 1 for subsequent use is provided with valve 3-5, and between its cavity of resorption and pressure sensor I4, connecting line is provided with valve 3-6; In process of the test, if being finished for the water coal mixtures (suspension) tested in a piston stirred vessel 1, test can be continued, completing smoothly of guarantee test with another piston stirred vessel 1 for subsequent use, avoid test interrupt and affect the precision of result of the test data.
Pipeline between counterbalance valve 14 and electromagnetic flowmeter 16 is provided with pressure sensor II15, for measuring the pressure in pipeline.
Be respectively equipped with in the bottom of two piston stirred vessel 1 cavity of resorptions and connect open to atmosphere pipeline, pipeline is respectively equipped with valve 3-12 and valve 3-13, when after off-test, if the water coal mixtures (suspension) in piston stirred vessel 1 is not finished, namely carry out earial drainage by opening valve 3-12 herein and valve 3-13.
The export pipeline of constant-flux pump 13 is communicated with between the inlet ductwork of core holding unit 5, and connecting pipeline is provided with valve 3-7, when needing to do seepage tests, without the need to through piston stirred vessel 1, the pipeline directly through valve 3-7 place can be tested directly to core holding unit 5 water filling.
Described valve 3-1 ~ 3-13 is one way valve, only allows liquid one-way flowing, prevents from causing the inaccurate of result of the test because of the backflow of liquid.
When this device carries out coal dust migration test, water coal mixtures (suspension) used is suspended in the fluid mixture formed in coal seam water for coal dust granule.When carrying out coal dust migration test with this device, the flow of the water coal mixtures (suspension) in the sample room needing accurately real time measure to flow in core holding unit 5 along pipeline, can the high precision flow of accurate measurement water coal mixtures (suspension) flow but there is no at present, because the flow meter that precision is high does not allow by suspension, suspension can Severe blockage, damage flow meter.In order to address this problem, accurate-metering, control inject the flow of the water coal mixtures (suspension) of core holding unit, and this test have employed the method that clear water promotes water coal mixtures (suspension).The principle applied is: the compressibilty of water is very little, can ignore, then when piston stirred vessel 1 upper and lower cavity pipeline diameter is identical, the flow that clear water is injected piston stirred vessel 1 epicoele by constant-flux pump 13 is identical with the flow that piston stirred vessel 1 cavity of resorption suspension flows out, so only need the flow of accurate control, the injection of metering piston stirred vessel 1 epicoele clear water, accurately can obtain piston stirred vessel 1 cavity of resorption and be suspended the flow of outflow and the flow of suspension injection core holding unit 5.
In order to improve the compliance of this experimental rig, this experimental rig can be the water coal mixtures (suspension) of 3mm by coal dust maximum particle diameter; Permission is the water coal mixtures (suspension) of about 20% by biggest quality concentration, in addition, coal particle size is larger, equipment allow the quality of pc concentration passed through less, the maximum permission mass concentration that the mass concentration value being not more than 10% is coal particle size when being 2mm.So this experimental facilities can simulate the migration of all particle diameter coal dusts in actual coal bed gas well output coal seam water.
The present invention's Minimum Area area used is 4500mm × 6500mm; For guaranteeing the safety tested, be divided into control zone, trial zone, control zone and trial zone isolate, and guarantee that human users is in safety zone, by camera in control indoor observation monitoring test district.
Coal bed gas well mining output coal dust transported simulation test method of the present invention, step is as follows:
(1) ready coal column or fracturing sand that is cementing, compacting are loaded in the gum cover of core holding unit 5, gum cover two ends are respectively charged into the steel cushion block identical with its internal diameter, O type circle is enclosed within the gum cover outside two cushion blocks respectively, gum cover is placed in core holding unit 5, regulate the length of core holding unit 5, gum cover and test specimen are fixed;
(2) certain for the concentration configured, that capacity is certain water coal mixtures (suspension) is put into the cavity of resorption of the piston stirred vessel 1 cleaned up;
(3) connecting line in whole experimental rig, power supply etc. are connected, opening power and electrical control and monitoring system;
(4) in container I9 and container III12, clear water is filled with;
(5) open air compressor machine 6 and liquid booster pump 8, open the valve 3-9 between liquid booster pump 8 and core holding unit 5, in the annular space of core holding unit 5, water filling adds confined pressure, stops increasing confined pressure when confined pressure reaches experimental design value;
(6) open counterbalance valve 14, and be set to test setting pressure, arranging constant-flux pump 13 output pressure is experimental design pressure, by co-controlling and the adjustment of counterbalance valve 14 and constant-flux pump 13, guarantees the stable of pressure in process of the test; Open valve 3-8 and the valve 3-11 of core holding unit 5 inlet and outlet, open the valve 3-1 on constant-flux pump 13 and piston stirred vessel 1 connecting pipeline and valve 3-2, close the valve 3-6 on the valve 3-5 of a piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, open the valve 3-4 on the valve 3-3 of another piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, to piston stirred vessel 1 epicoele water filling pressurization, start in core holding unit 5, inject water coal mixtures (suspension); In process of the test, when the water coal mixtures (suspension) in piston stirred vessel 1 is used up, valve 3-4 on the valve 3-3 of closure piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, open the valve 3-6 on the valve 3-5 of another piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, continue to inject water coal mixtures (suspension) to core holding unit 5;
(7) to observe on pressure sensor I4 and pressure sensor II15 or display force value in control software design, and counterbalance valve 14 and constant-flux pump 13 are suitably regulated, make the force value of core holding unit 5 entrance reach test pressure; Core holding unit 5 exit emptying is atmospheric pressure, and therefore, the force value that pressure sensor I4 records deducts the pressure differential that atmospheric pressure is core holding unit 5 entrance and exit; In process of the test, when rock core permeability changes, injection pressure is constant, the change of core holding unit 5 inlet flow rate can be caused, now, by electromagnetic flowmeter 16, flow information is passed to constant-flux pump 13, and automatically regulate injection flow by constant-flux pump 13, make the pressure of core holding unit 5 entrance remain definite value, pressure error is no more than 0.05MPa, thus the pressure reduction ensureing core holding unit 5 two ends is definite value;
(8) in process of the test, monitored, record the numerical value change situation of pressure sensor I4, balance 11 and electromagnetic flowmeter 16 by control software design, and calculate the real-time pressure reduction of core holding unit 5 entrance and outlet, draw related data curve over time, the suspension that core holding unit 5 flows out is received by the container II10 be connected with outlet;
(9) after off-test, open the valve 3-10 between core holding unit 5 annular space and container I9 on connecting line and the valve 3-12 opened bottom two piston stirred vessels 1 and valve 3-13 carries out earial drainage, remove pipeline and connect; Open core holding unit 5, will test specimen be taken out, washing test container.
Another kind of coal bed gas well mining output coal dust transported simulation test method of the present invention, step is as follows:
(1) ready coal column or fracturing sand that is cementing, compacting are loaded in the gum cover of core holding unit 5, gum cover two ends are respectively charged into the steel cushion block identical with its internal diameter, O type circle is enclosed within the gum cover outside two cushion blocks respectively, gum cover is placed in core holding unit 5, regulate the length of core holding unit 5, gum cover and test specimen are fixed;
(2) certain for the concentration configured, that capacity is certain water coal mixtures (suspension) is put into the cavity of resorption of the piston stirred vessel 1 cleaned up;
(3) connecting line in whole experimental rig, power supply etc. are connected, opening power and electrical control and monitoring system;
(4) in container I9 and container III12, clear water is filled with;
(5) open air compressor machine 6 and liquid booster pump 8, open the valve 3-9 between liquid booster pump 8 and core holding unit 5, in the annular space of core holding unit 5, water filling adds confined pressure, stops increasing confined pressure when confined pressure reaches experimental design value;
(6) open counterbalance valve 14, and be set to maximum working pressure, arranging constant-flux pump 13 output flow is experimental design flow; Open valve 3-8 and the valve 3-11 of core holding unit 5 inlet and outlet, open the valve 3-1 on constant-flux pump 13 and piston stirred vessel 1 connecting pipeline and valve 3-2, close the valve 3-6 on the valve 3-5 of a piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, open the valve 3-4 on the valve 3-3 of another piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, to piston stirred vessel 1 epicoele water filling pressurization, start in core holding unit 5, inject water coal mixtures (suspension); In process of the test, when the water coal mixtures (suspension) in piston stirred vessel 1 is used up, valve 3-4 on the valve 3-3 of closure piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, open the valve 3-6 on the valve 3-5 of another piston stirred vessel 1 epicoele entrance and cavity of resorption and core holding unit 5 connecting pipeline, continue to inject water coal mixtures (suspension) to core holding unit 5;
(7) to observe on electromagnetic flowmeter 16 or display flow value in control software design, and constant-flux pump 13 is suitably regulated, make the flow value of core holding unit 5 entrance reach test setting flow; Core holding unit 5 exit emptying, for atmospheric pressure, therefore, the force value that pressure sensor I4 records deducts the pressure differential that atmospheric pressure is core holding unit 5 entrance and exit, and from core holding unit 5, the flow of effluent fluid is converted by the weight of fluid in the container II10 weighed according to balance 11 and obtains; In process of the test, when rock core permeability changes, if flow is constant, the change of core holding unit 5 inlet pressure can be caused, now, by pressure sensor I4, pressure information is passed to constant-flux pump 13, and automatically regulate injection pressure by constant-flux pump 13, make the flow of core holding unit 5 entrance remain definite value, flow error is no more than 0.01ml/m;
(8) in process of the test, monitored, record the numerical value change situation of constant-flux pump 13, pressure sensor I4, balance 11 and electromagnetic flowmeter 16 by control software design, and calculate the real-time pressure reduction of core holding unit 5 entrance and outlet, draw related data curve over time, the suspension that core holding unit 5 flows out is received by the container II10 be connected with outlet;
(9) after off-test, open the valve 3-10 between core holding unit 5 annular space and container I9 on connecting line and the valve 3-12 opened bottom two piston stirred vessels 1 and valve 3-13 carries out earial drainage, remove pipeline and connect; Open core holding unit 5, will test specimen be taken out, washing test container.
By known to coal bed gas well monitoring, coal particle size entrained in actual coal bed gas well output coal seam water is generally not more than 1mm, owing to can carry out the coal dust of 1-2mm particle diameter during fracturing fluid recovery (backflow), the middle coal particle size of water coal mixtures (suspension) that therefore this test adopts is 2mm to the maximum; In actual coal bed gas well output coal seam water, the mass concentration of coal dust is not more than 10%, and therefore, the concentration of the water coal mixtures (suspension) that this test adopts is not more than 10%.
In this test, pressure break Grains number used is 65 ~ 14 orders (i.e. 0.212-1.18mm).
Claims (7)
1. a coal bed gas well mining output coal dust transported simulation experimental rig, it is characterized in that: comprise piston stirred vessel (1), core holding unit (5), air compressor machine (6), electromagnetic valve (7), liquid booster pump (8), balance (11), constant-flux pump (13), counterbalance valve (14), electromagnetic flowmeter (16) and electrical control and monitoring system, the inlet tube crossing of described constant-flux pump (13) is placed in container III (12), export pipeline is connected in series counterbalance valve (14) successively, electromagnetic flowmeter (16) is communicated with the epicoele of piston stirred vessel (1) afterwards, the cavity of resorption of piston stirred vessel (1) is communicated with the axial inlet of core holding unit (5), the axis outlet line portals of core holding unit (5) is placed in container II (10), the axial inlet pipeline of core holding unit (5) is provided with pressure sensor I (4), and container II (10) is placed on balance (11), electromagnetic valve (7) two ends are connected with air compressor machine (6) and liquid booster pump (8) respectively, the inlet tube crossing of liquid booster pump (8) is placed in container I (9), the inlet communication of outlet and core holding unit (5) ring pressure, the outlet crossing of core holding unit (5) ring pressure is placed in container I (9), described electrical control and monitoring system are made up of electrical equipment and control software design.
2. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 1, it is characterized in that: on the export pipeline of constant-flux pump (13), be provided with valve (3-1), the export pipeline of electromagnetic flowmeter is provided with valve (3-2), piston stirred vessel (1) epicoele inlet ductwork is provided with valve (3-3), between piston stirred vessel (1) cavity of resorption and pressure sensor I (4), connecting line is provided with valve (3-4), the inlet ductwork and export pipeline of core holding unit (5) are respectively equipped with valve (3-8) and valve (3-11), the connecting line of liquid booster pump (8) and core holding unit (5) ring pressure is provided with valve (3-9), the export pipeline of core holding unit (5) ring pressure is provided with valve (3-10).
3. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 1 and 2, it is characterized in that: described piston stirred vessel (1) comprises container cartridge, piston and agitator (2), piston is placed in container cartridge, the dead in line of its axis and container cartridge, agitator (2) is connected with bottom the cavity of resorption of container cartridge.
4. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 3, it is characterized in that: also comprise piston stirred vessel (1) for subsequent use, the epicoele of two piston stirred vessels (1) and the pipeline parallel communication with constant-flux pump (13) outlet, cavity of resorption and the pipeline parallel communication be communicated with core holding unit (5) axial inlet; The epicoele inlet ductwork of piston stirred vessel (1) for subsequent use is provided with valve (3-5), and the connecting line between its cavity of resorption and pressure sensor I (4) is provided with valve (3-6).
5. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 4, is characterized in that: the pipeline between counterbalance valve (14) and electromagnetic flowmeter (16) is provided with pressure sensor II (15).
6. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 5, it is characterized in that: be respectively equipped with in the bottom of two piston stirred vessel (1) cavity of resorptions and connect open to atmosphere pipeline, pipeline is respectively equipped with valve (3-12) and valve (3-13).
7. a kind of coal bed gas well mining output coal dust transported simulation experimental rig according to claim 6, is characterized in that: described valve (3-1 ~ 3-6,3-8 ~ 3-13) is one way valve.
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| CN105735966A (en) * | 2016-04-07 | 2016-07-06 | 中国地质大学（武汉） | Coal-bed gas well shaft drainage gas recovery coal dust migration simulation device and simulation method |
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN106677772A (en) * | 2016-12-27 | 2017-05-17 | 安徽理工大学 | Simulation test device and method for coal bed gas well discharging and mining |
| CN109826621A (en) * | 2019-01-17 | 2019-05-31 | 西安科技大学 | A kind of coal bed gas commingling production air water two phase fluid flow experimental provision and test method |
| CN110186813A (en) * | 2019-05-09 | 2019-08-30 | 西南石油大学 | The dynamic characteristic test macro and test method of pulverized coal group under the conditions of a kind of crack |
| CN114263457A (en) * | 2021-12-30 | 2022-04-01 | 中国地质大学（武汉） | Gas production simulation platform of coal-bed gas well and yield analysis and prediction method |
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