CN203711165U - Coal mine return wind current low-concentration gas multi-stage purification test device - Google Patents
Coal mine return wind current low-concentration gas multi-stage purification test device Download PDFInfo
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- CN203711165U CN203711165U CN201320811120.0U CN201320811120U CN203711165U CN 203711165 U CN203711165 U CN 203711165U CN 201320811120 U CN201320811120 U CN 201320811120U CN 203711165 U CN203711165 U CN 203711165U
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Abstract
The utility model relates to a coal mine return wind current low-concentration gas multi-stage purification test device, which effectively solves the problem of low-concentration gas purification and adopts a method that a motor is arranged at the bottom of an experiment box body, blades arranged in the experiment box body are arranged on a rotating shaft of the motor, operation support frames for a wind speed sensor, a pressure sensor and a gas concentration sensor are respectively arranged outside the experiment box body, each operation support frame consists of a base, a main shaft vertically arranged on the base, and a mechanical arm arranged on the main shaft, an air outlet hole is formed in one side of the lower part of the experiment box body, a draft fan is arranged on a pipeline of the air outlet hole, an air outlet pipe is arranged on the top of the experiment box body, a main current pipeline is arranged on the air inlet hole, with the lower part corresponding to the air outlet hole, positioned in the other side, the main current pipeline is communicated with a gas mixing box body, the gas mixing box body is respectively connected with a pipeline of a gas tank and a pipeline of a variable-frequency blast flower through a three-way valve. The coal mine return wind current low-concentration gas multi-stage purification test device has the advantages that the operation and the use are convenient, the test device can be effectively used for the low-concentration gas purification test, and the sufficient utilization of resources and the production safety are ensured.
Description
Technical field
The utility model relates to mining (colliery) equipment, particularly a kind of coal mine return air stream low concentration gas multistage purification experimental rig.
Background technology
Along with coal mining develops to deep, coal seam gas-bearing capacity increases, gas pressure increases, and resource and environmental requirement, in colliery, gas pumping puts more effort, however, in colliery, gas pumping utilizes the only 10%-20% of gas in coal seam of total amount, most gas in coal seam are to parse when coal mining, and by entering after mine ventilation is diluted in atmosphere, data shows, China's wind gas-removing amount accounts for the more than 80% of coal-bed gas total amount, the principal character of this part gas is that concentration is low, be generally 0.6%-1%, and fully mix with mine return air stream, can not directly utilize, cause the huge wasting of resources and environmental pollution.The purification technique of low concentration gas mainly contains pressure-variable adsorption, membrane separation technique and low-temperature liquefaction technology at present, pressure-variable adsorption gas purification technique, great majority are also in the developmental research stage, pressure swing adsorption is to utilize the equilibrium adsorption capacity of adsorbent with the characteristic of partial component pressure rising increase, the absorption of pressurizeing, decompression desorption.Pressure swing adsorption is considered to the technology of comparative maturity at present, there is the device that becomes serial available, but, its application in gas purification field depends primarily on its economic rationality, for low concentration, even the purification process of the methane gas of extremely low concentration is complicated, and desired methane (CH before separated
4) concentration is higher, is not suitable for the gas that coal mine return air amount is large and concentration is low and purifies, economy is not high, and use value is little; It is separating medium that membrane separation technique selectively sees through film, and certain motive force (as pressure differential, concentration difference, potential difference etc.) of utilizing film both sides to exist makes feed side compositional selecting and sees through film, has reached object separated, that purify.Although use to some extent industrial, based on the large feature of coal mine return air amount, if carry out separating-purifying, power consumption is considerably beyond the methane energy of obtaining, very uneconomical; Conventional coal gas gasification system is applicable to not containing the high concentration coal seam gas of a large amount of nitrogen oxygen compositions, is not suitable for especially the gas that coal mine return air amount is large and concentration is low and purifies; Therefore the purification (experiment) that, how effectively to solve low concentration gas is the technical problem that need to conscientiously solve.
Summary of the invention
For above-mentioned situation, for solving the defect of prior art, the object of the utility model is just to provide a kind of coal mine return air stream low concentration gas multistage purification experimental rig, can effectively solve purification (experiment) problem of low concentration gas.
The technical scheme that the utility model solves is, comprise experimental box body, motor and sensor, adjustable motor is equipped with in the bottom of experimental box body, in the rotating shaft of motor, there is the fan blade being contained in experimental box body, form the air whirl field structure of varying strength, on experimental box body perisporium, have a plurality of peepholes and observation window (observation window is for observing the rotation of casing internal fan and the situation of change of air-flow), experimental box body is equipped with outward air velocity transducer is installed respectively, pressure sensor, the operation support of gas concentration sensor, operation support is by vertically arranged main shaft on base and base, and the mechanical arm that is circular-rotation on main shaft forms, air velocity transducer, pressure sensor, gas concentration sensor is contained in respectively on mechanical arm, by peephole, stretch in experimental box body and (realize the wind speed in experimental box body, pressure, gas density is tested), air velocity transducer, pressure sensor, gas concentration sensor by data wire be placed in display instrument on experimental box body be connected (directly reading storage and analyzing test data by display instrument), experimental box body bottom is arranged on bracing frame (for fixing and stable casing, guarantee result of use), experimental box body bottom one side offers venthole, air exhauster (for extracting bottom low-concentration methane gas) is housed on the pipeline of venthole, escape pipe (escape pipe 10 is for collecting high concentration gas gas) is arranged at the top of experimental box body, main flow pipeline is housed on the air admission hole of the opposite side that experimental box body bottom is corresponding with venthole, the first gas flowmeter is installed on main flow pipeline, main flow pipeline is connected with gas mixing casing, gas mixing casing is hinged with respectively the pipeline of the gas pot of high concentration through triple valve, the pipeline of the frequency conversion type air blast of fresh air is provided, high concentration gas gas and live gas are entered in gas mixing casing to be mixed, become low-concentration methane gas, through main flow pipeline, enter in experimental box body again, unlatching motor can be realized low concentration gas multistage purification is tested.
The utility model novel structure is unique, easy for operation, is effective to low concentration gas to purify and test, and guarantees making full use of and production safety of resource, has significant economic and social benefit.
Accompanying drawing explanation
Fig. 1 is structural front view of the present utility model.
Fig. 2 is the annexation figure of sensor of the present utility model and display.
Fig. 3 is sensor operation rack assumption diagram of the present utility model.
The specific embodiment
Below closing accompanying drawing elaborates to the specific embodiment of the present utility model.
Shown in Fig. 1-3, the utility model comprises experimental box body, motor and sensor, adjustable motor 6 is equipped with in the bottom of experimental box body 1, in the rotating shaft of motor 6, there is the fan blade 7 being contained in experimental box body, form the air whirl field structure of varying strength, on experimental box body perisporium, have a plurality of peepholes 2 and observation window 3(observation window for observing the rotation of casing internal fan and the situation of change of air-flow), experimental box body is equipped with outward air velocity transducer is installed respectively, pressure sensor, the operation support of gas concentration sensor, operation support is by vertically arranged main shaft 20 on base 22 and base, and the mechanical arm 21 that is circular-rotation on main shaft forms, air velocity transducer, pressure sensor, gas concentration sensor is contained in respectively on mechanical arm 21, by peephole, stretch in experimental box body and (realize the wind speed in experimental box body, pressure, gas density is tested), air velocity transducer, pressure sensor, gas concentration sensor by data wire be placed in display instrument 24 on experimental box body be connected (directly reading storage and analyzing test data by display instrument), experimental box body bottom is arranged on bracing frame 8 (for fixing and stable casing, guarantee result of use), experimental box body bottom one side offers venthole 5, air exhauster 4(is housed for extracting bottom low-concentration methane gas on the pipeline of venthole 5), there is escape pipe 10(escape pipe 10 at the top of experimental box body for collecting high concentration gas gas), on the air admission hole 9 of the opposite side that experimental box body 1 bottom is corresponding with venthole 5, main flow pipeline 19 is housed, the first gas flowmeter 18 is installed on main flow pipeline 19, main flow pipeline 19 is connected with gas mixing casing 17, gas mixing casing 17 is hinged with respectively the pipeline 12a of the gas pot 11 of high concentration through triple valve 16, the pipeline 12b of the frequency conversion type air blast 15 of fresh air is provided, high concentration gas gas and live gas are entered in gas mixing casing 17 to be mixed, become low-concentration methane gas, again in main flow pipeline 19 enters experimental box body 1, unlatching motor can be realized low concentration gas multistage purification is tested.
In order to guarantee result of use, the flowmeter 13 of gas is housed on the pipeline 12a of described gas pot, the second gas flowmeter 14 is housed on the pipeline 12b of frequency conversion type air blast; Described air admission hole 9 places are provided with the pressure gauge 25 of test pressure; The pipeline 12a of the gas pot 11 of described high concentration is equipped with the control valve 26 of flow near gas pot place, for controlling from gas pot high concentration gas flow out.
Air velocity transducer, pressure sensor, gas concentration sensor can be installed and used simultaneously, also can be installed separately use, depending on the needs of test and different, therefore, sensor can be to comprise air velocity transducer, pressure sensor, gas concentration sensor, also can be each sensor, therefore use same Reference numeral 23.
By said structure, can be found out, the utility model is the experimental rig of a kind of coal mine return air stream low concentration gas multistage purification basic research, comprises experimental box body 1, in the bottom of casing, Frequency Adjustable motor 6 is installed, is furnished with the fan blade 7 of different model on motor 6, the combination of motor and fan blade is in order to provide the air whirl field of varying strength, casing surrounding evenly offers peephole 2, in order to air velocity transducer to be installed, pressure sensor, gas concentration sensor 24, sensor can stretch in casing, to such an extent as to the parameter that can test the gas of any position of box house, sensor a special crosshead 20 is installed, crosshead 20 bottoms are to be parallel to the tripod that horizon evenly piles, in order to support operation frame 20, on the main shaft of crosshead 20, be provided with can surrounding activity mechanical arm 21, the sensor 23 of mechanical arm 21 clampings is put into test casing 1, complete test job, at sensor 24, be circumscribed with display instrument 25, display instrument 25 can directly read, storage and analyte sensors 24 are in casing build-in test data, on casing 1, offer observation window 3, observation window 3 can be observed the rotation of casing internal fan and the situation of change of air-flow, bracing frame 8, work that can be stable in order to static housing are settled in casing 1 bottom, air admission hole 9 and venthole 5 are offered in casing 1 bottom, and venthole 5 outsides are connected to air exhauster 4, and in order to extract the mist that bottom gas density is low, the top of casing 1 offers venthole 10, and venthole 10 is used for collecting the mist that gas density is high, casing 1 lower air inlet 9 is circumscribed with main flow pipeline 19, according to the direction of air-flow, be once provided with gas pot 11, mainly be to provide the gas of high concentration, frequency conversion type air blast 15 is in order to provide ozone, methane gas enters triple valve 16 along arm 12, flowmeter 13 is installed on arm 12, fresh air is also along the arm triple valve 16 of entering, flowmeter 14 is installed on arm, methane gas and fresh air enter gas mixing casing 17 inside fully to be mixed, from mixing casing gas relatively uniformly out, enter main pipeline 19, flowmeter 18 is installed on main pipeline 19, approaching entrance 9 places and be provided with the pressure gauge of test pressure, in order to test access pressure, the discharge of high concentration gas from the gas pot of high concentration controlled by control valve 26, and show metering by the flowmeter of gas, realize different flow and form from fresh air the gaseous mixture that multistage concentration is different, to be applied to experiment.
For guaranteeing the safety of experimentation, before on-test, first open the exhaust outlet 10 at test casing top, then to test casing the inside, wash away the mist of fresh air and gas, gas to be mixed be full of whole device after, start to detect with firedamp sensor the methane concentration of upper venthole 10 and lower production well 5, if following table is when in test casing, fan blade does not rotate and rotates, the methane concentration of upper venthole and lower production well during different time.The reason that has technical elements, does not test box house methane concentration along with the situation of change of time and the physical relationship between the inner methane concentration of experimental box body and mixture pressure and flow velocity in narration here.
Experiment one: CH4 opens motor and extracts experiment
Step 1, by threeway, connect frequency conversion type air blast and gas pot, flow instrument is installed in threeway exit;
Step 2, adjusting frequency conversion type air blast and gas pot, make threeway exit CH4 concentration in 0.5% left and right, then surveys its wind speed;
Step 3, write down the position of the rotation of frequency conversion type air blast and gas pot rotary switch, carry out and close frequency conversion type air blast machine after mark and gas pot (could utilize and be with separately Pressure gauge scale to carry out mark?)
Step 4, connecting tee outlet and closed container;
Step 5, drive frequency conversion type air blast and rotary switch to mark position (scale), then open that gas pot revolves and turn-off closes mark position (scale), finally open frequency conversion type motor;
Step 6, after 3 minutes, start record data, in Table one.
Test two CH4 disable motors and extract experiment
Step 1, by threeway, connect frequency conversion type and gas pot, flow instrument is installed in threeway exit;
Step 2, adjusting frequency conversion type air blast and gas pot, make threeway exit CH4 concentration in 0.5% left and right, then surveys its wind speed;
Step 3, write down the position of the rotation of frequency conversion type air blast and gas pot rotary switch, close frequency conversion type air blast and gas pot after carrying out mark; (could utilize and be with separately Pressure gauge scale to carry out mark?)
Step 4, connecting tee outlet and closed container;
Step 5, drive frequency conversion type air blast and rotary switch to mark position (scale), then open gas pot and rotary switch to mark position (scale);
Step 6, after 3 minutes, start record data, see attached list two.
Table one is opened motor
Table two disable motor
When motor is opened, when inlet gas concentration is 0.5%, writing time, the concentration of venthole methane from 1 minute to the 8th minute increased always, and maximum reaches 0.85%; The concentration of interior lower production well methane is reducing always during this period of time, and minimum of a value is 0.32%.After 8 minutes, the concentration of upper lower production well methane tends towards stability, while now going up venthole methane concentration 2.656 of lower production well methane concentration times.When motor cuts out, writing time, the concentration of venthole methane from 1 minute to the 8th minute increased always, and tended towards stability gradually; Lower production well methane concentration is reducing always, also tends towards stability gradually, because the proportion that contains variable concentrations gas is different, realizes gradually natural layering, and while stablizing, the ratio of upper lower production well methane concentration is 1.67 times.The vortex field of opening motor generation is remarkable to the refining effect of methane, and has all obtained identical or close result through repeated multiple times experiment, shows that experimental provision succeeds, and has very strong practical value, is the innovation on gas multistage purification experimental facilities.
Claims (4)
1. a coal mine return air flows low concentration gas multistage purification experimental rig, comprise experimental box body, motor and sensor, it is characterized in that, adjustable motor (6) is equipped with in the bottom of experimental box body (1), in the rotating shaft of motor (6), there is the fan blade (7) being contained in experimental box body, form the air whirl field structure of varying strength, on experimental box body perisporium, have a plurality of peepholes (2) and observation window (3), experimental box body is equipped with outward air velocity transducer is installed respectively, pressure sensor, the operation support of gas concentration sensor (23), operation support is by vertically arranged main shaft (20) on base (22) and base, and the mechanical arm (21) that is circular-rotation on main shaft forms, air velocity transducer, pressure sensor, gas concentration sensor is contained in respectively on mechanical arm (21), by peephole, stretched in experimental box body, air velocity transducer, pressure sensor, gas concentration sensor is connected with the display instrument (24) being placed on experimental box body by data wire, experimental box body bottom is arranged on bracing frame (8), experimental box body bottom one side offers venthole (5), air exhauster (4) is housed on the pipeline of venthole (5), escape pipe (10) is arranged at the top of experimental box body, on the air admission hole (9) of the opposite side that experimental box body (1) bottom is corresponding with venthole (5), main flow pipeline (19) is housed, the first gas flowmeter (18) is installed on main flow pipeline (19), main flow pipeline (19) is connected with gas mixing casing (17), gas mixing casing (17) is hinged with respectively the pipeline (12a) of the gas pot (11) of high concentration through triple valve (16), the pipeline (12b) of the frequency conversion type air blast (15) of fresh air is provided.
2. coal mine return air according to claim 1 flows low concentration gas multistage purification experimental rig, it is characterized in that, the flowmeter (13) that gas is housed on the pipeline of described gas pot (12a), is equipped with the second gas flowmeter (14) on the pipeline of frequency conversion type air blast (12b).
3. coal mine return air stream low concentration gas multistage purification experimental rig according to claim 1, is characterized in that, described air admission hole (9) locates to be provided with the pressure gauge (25) of test pressure.
4. coal mine return air stream low concentration gas multistage purification experimental rig according to claim 1, is characterized in that, the pipeline (12a) of the gas pot of described high concentration (11) is equipped with the control valve (26) of flow near gas pot place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811120.0U CN203711165U (en) | 2013-12-07 | 2013-12-07 | Coal mine return wind current low-concentration gas multi-stage purification test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811120.0U CN203711165U (en) | 2013-12-07 | 2013-12-07 | Coal mine return wind current low-concentration gas multi-stage purification test device |
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| CN203711165U true CN203711165U (en) | 2014-07-16 |
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| CN201320811120.0U Expired - Fee Related CN203711165U (en) | 2013-12-07 | 2013-12-07 | Coal mine return wind current low-concentration gas multi-stage purification test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691579A (en) * | 2013-12-07 | 2014-04-02 | 河南理工大学 | Multistage purification testing device for mine return current low-concentration gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691579A (en) * | 2013-12-07 | 2014-04-02 | 河南理工大学 | Multistage purification testing device for mine return current low-concentration gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20141207 |
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| EXPY | Termination of patent right or utility model |