CN113006792A - Source-saving device and method for improving wetting effect of coal seam water injection - Google Patents
Source-saving device and method for improving wetting effect of coal seam water injection Download PDFInfo
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- CN113006792A CN113006792A CN202110370729.8A CN202110370729A CN113006792A CN 113006792 A CN113006792 A CN 113006792A CN 202110370729 A CN202110370729 A CN 202110370729A CN 113006792 A CN113006792 A CN 113006792A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 239000003245 coal Substances 0.000 title claims abstract description 50
- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 230000000694 effects Effects 0.000 title claims abstract description 27
- 238000009736 wetting Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002101 nanobubble Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 3
- 206010016807 Fluid retention Diseases 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a method for improving the wetting effect of coal seam water injection, which comprises the following steps: more than two water tanks are arranged, and a water inlet and a water outlet are respectively connected to the water tanks; the water inlet is communicated with a micro-nano bubble generating device, and the micro-nano bubble generating device is communicated with an external water delivery device; the electromagnetic valve is arranged at the water outlet to control the plurality of water tanks to discharge bubble water in turn, so that the water retention of the coal bed is greatly enhanced, and the coal bed is fully wetted; through the structure of the invention, redundant vent holes can be automatically closed according to the height of the liquid level of the water tank, the vent holes soaked below the water level are opened, secondary nano bubbles are generated, meanwhile, bubbles are generated secondarily to enable the liquid below the water level to be uniform, the opening and closing of the air pipe can be controlled according to the height of the liquid level, the waste of gas after the vent holes above the liquid level are opened is prevented, and resources are further effectively saved.
Description
Technical Field
The invention relates to the field of environment-friendly equipment, in particular to a source-saving device and a source-saving method for improving the wetting effect of coal seam water injection.
Background
Coal mine dust is one of major disasters in coal mine production, and seriously threatens the physical health of operating personnel. Coal seam flooding is the most basic effective dustproof measure in coal mining. Pressure water is injected into the coal body on the working face which is not exploited through the drill hole, so that the coal body is wetted in advance, and the generation of coal dust is greatly reduced in the exploitation process. In addition, the coal seam can destroy the balance of an original gas-coal system in the coal body after water injection, reduce the gas concentration and the stress concentration degree of the coal, and has the effects of preventing rock burst, reducing the coal temperature, preventing the coal from being natural and the like. The nature of the injected water has a great influence on the final wetting effect of the coal body, and at present, the surface tension of water is mainly reduced by adding a certain proportion of wetting agent into the water, so that the wetting capability of the water on coal dust and the dust suppression effect are improved. The adding method has complex process, is difficult to popularize and apply, and has great pollution to the surrounding environment. Aiming at the problem that the property of pressure water is insufficient and the wetting effect of coal seam water injection is poor, the invention needs to provide a method and a device for improving the wetting effect of coal seam water injection from the practical aspect of mine engineering.
Thus, there is a need for further improvements in the field of existing security devices.
Disclosure of Invention
The invention aims to provide a method for improving the wetting effect of coal seam water injection, which can solve the problem of poor wetting effect of the current coal seam water injection.
In order to achieve the purpose, the invention adopts the following scheme:
a method for improving the wetting effect of coal seam flooding comprises the following steps: more than two water tanks are arranged, and a water inlet and a water outlet are respectively connected to the water tanks; the water inlet is communicated with a micro-nano bubble generating device, and the micro-nano bubble generating device is communicated with an external water delivery device; an electromagnetic valve is arranged at the water outlet to control the bubble water discharged by the water tanks in turn;
step two: the dispersed gas input pipe inputs dispersed gas into the plurality of shunt pipes, secondary nano bubble treatment is carried out on liquid in the water tank, the floating plate at the corresponding position rises according to the liquid level height in the water tank, after rising, the first clamping hook at the corresponding position is pulled to one side, the second clamping hook is separated from the first clamping hook, at the moment, the first clamping hook at the corresponding level height is unlocked by the second clamping hook, the inner piston body moves upwards due to the acting force of the dispersed gas, so that the shunt pipes at the liquid level height are opened to admit air, and the secondary nano bubble treatment is carried out on the liquid in the water tank;
step three: and after the liquid is static in the water tank for a period of time, the water outlet injects the liquid into the coal bed through the booster pump.
Furthermore, a floating ball is arranged in the water tank, and the floating ball pushes a piston in the valve body into the valve body through a connecting rod after rising along with the water level, so that the floating ball valve arranged in the water tank achieves the purpose of automatic closing.
Further, the micro-nano bubble generating device is explosion-proof.
Further, a check valve, a pressure gauge and a filter are arranged on the water outlet.
The invention aims to provide a source-saving device for improving the wetting effect of coal seam water injection, which can reduce the invalid work of nano-bubble generation and save resources.
A source-saving device for improving the wetting effect of coal seam water injection comprises a water tank, wherein a dispersed gas input pipe is connected to the bottom of the water tank, a plurality of shunt pipelines are uniformly distributed in the water tank from top to bottom, the shunt pipelines are communicated through a vertical pipeline arranged on one side, the vertical pipeline is communicated with the dispersed gas input pipe, and a piston body for controlling whether the shunt pipelines circulate dispersed gas or not is arranged in the vertical pipeline; an opening is formed above the vertical pipeline, a vertical rod is arranged in the water tank on one side of the vertical pipeline, a plurality of transverse holes are formed in the vertical rod from top to bottom, and sliding blocks are movably arranged in the transverse holes; the vertical pipe is externally provided with a first clamping hook, the first clamping hook and the connecting rod is arranged between the piston bodies, the sliding block is close to one side of the first clamping hook is provided with a second clamping hook, the other side of the first clamping hook is provided with a first hinged seat, the vertical rod side wall above the transverse hole is provided with a vertical shaft seat, the vertical shaft seat is internally movably provided with a vertical shaft, the upper end of the vertical shaft is provided with a floating plate, the lower end of the vertical shaft is provided with a second hinged seat, and the second hinged seat and the first hinged seat are hinged to form a connecting rod.
Furthermore, a plurality of shunting holes are formed in the shunting pipeline.
Further, the number of the cross holes is the same as that of the diversion pipelines, and the cross holes are arranged in one-to-one transverse alignment mode.
Further, the first hook and the piston body have the same horizontal position.
In summary, compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, the invention has the beneficial effects that: the surface tension of water is reduced under the condition of not adding a surfactant, and the moisture absorption capacity of dust is enhanced, so that the wetting effect of coal seam water injection is effectively improved; after being treated by the micro-nano bubble generating device, the structure of water molecules is reduced, dozens of grouping groups are changed into a plurality of molecular groups, the permeability of water is greatly increased, the water can penetrate into various cracks and holes of the coal body, even the cracks below 0.1 mu m are filled with micro-nano bubble water, and therefore the effect of fully wetting the coal body before mining is achieved; the micro-nano bubbles have high stability, can exist in the coal bed for a long time, and are equivalent to a micro-nano bubble water film which is not easy to break and is formed on the surface of the coal bed, so that the water retention of the coal bed is greatly enhanced, and the coal bed is fully wetted; through the structure of the invention, redundant vent holes can be automatically closed according to the height of the liquid level of the water tank, the vent holes soaked below the water level are opened, secondary nano bubbles are generated, meanwhile, bubbles which enable the liquid below the water level to be uniformly produced are generated secondarily, the opening and closing of the air pipe can be controlled according to the height of the liquid level, and the waste of gas after the vent holes above the liquid level are opened is prevented, so that resources are further effectively saved. And the structure is simple, and the use is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the secondary generator of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to FIGS. 1-2, the present invention provides
A method for improving the wetting effect of coal seam water injection comprises the steps of firstly, arranging more than two water tanks 1, and respectively connecting a water inlet 2 and a water outlet 3 to the water tanks 1; the water inlet 2 is communicated with a micro-nano bubble generating device 4, and the micro-nano bubble generating device 4 is communicated with an external water delivery device; an electromagnetic valve 5 is arranged at the position of the water outlet 3 to control the plurality of water tanks 1 to alternately discharge bubble water;
step two, the dispersed gas input pipe 6 inputs dispersed gas into the plurality of shunt pipes 7, secondary nano bubble treatment is carried out on liquid in the water tank 1, the floating plate 19 at the corresponding position rises according to the liquid water level height in the water tank 1, after rising, the first hook 13 at the corresponding position is pulled to one side, the second hook 15 is separated from the first hook 13, at the moment, the second hook 15 unlocks the first hook 13 at the corresponding horizontal height, the inner piston body 9 moves upwards due to the acting force of the dispersed gas, so that the shunt pipes 7 at the liquid water level height are opened to admit air, and secondary nano bubble treatment is carried out on the liquid in the water tank 1;
and step three, after the liquid is static in the water tank 1 for a period of time, the water outlet 3 injects the liquid into the coal bed through the pressure pump 22.
The water inlets 2 of the mine water supply network and the water tanks 1 are respectively connected to the water inlet and the water outlet of the micro-nano bubble generating device 4, and the water outlets 3 of the water tanks 1 are respectively connected to the pressure pump.
And opening the micro-nano bubble generating device 4, and waiting for filling the water tank 1 with the nano bubble water. The mine water is processed by the micro-nano bubble generating device 4 to become nano bubble water containing a large amount of micro-nano bubbles.
The solenoid valve 5 is opened to supply water to the pressurizing pump. The time interval of the automatic switch of the electromagnetic valve 5 is set according to the water injection and discharge time of the water tank, so that the nano-bubble water in the water tank 1 is kept still for several minutes to remove bubbles with larger diameter, and the wetting effect is ensured.
And opening a water outlet 3 to inject micro-nano bubble water into the coal bed.
In the method for improving the wettability of coal seam water injection, the filling time of the water tank 1 is as follows:
in the formula: v represents the volume of the water tank 1, Q1Representing the instantaneous flow rate at which the tank 1 is filled.
The time for the water tank to completely discharge water is as follows:
in the formula: q2Representing the instantaneous flow of water from the tank 1.
The time interval for the automatic closing of the electromagnetic valve 5 is as follows:
t3＝t2；
the time interval for the automatic opening of the electromagnetic valve 5 is as follows:
t4＝t1+N；
in the formula: n represents the desired standing time.
According to the invention, the floating ball is arranged in the water tank 1, and the piston in the valve body is pushed into the valve body through the connecting rod after the floating ball rises along with the water level, so that the aim of automatically closing the floating ball valve 100 arranged in the water tank 1 is fulfilled.
The micro-nano bubble generating device 4 is explosion-proof.
The water outlet 3 is provided with a check valve 23, a pressure gauge 24 and a filter 25.
When the coal seam water injection operation is started, the micro-nano bubble generating device 4 is firstly opened andis connected to an external water network, common water is processed by the micro-nano bubble generating device 4 to generate water containing a large amount of micro-nano bubbles, and the generated bubble water is injected into the water tank 1. After the water tank 1 is filled, the piston in the valve body is pushed inwards by the lifting force generated by the rising of the floating ball along with the water level through the connecting rod, so that the floating ball valve 100 achieves the effect of automatic closing. After the bubble water is stood for a period of time, the electromagnetic valve 5 of the water tank 1 is opened and the time interval for automatically closing the electromagnetic valve is set to t3The time interval of automatic opening is t4. After large-particle impurities are removed from micro-nano bubble water flowing out of the water tank 1 through a filter, a water injection pump and a motor are started to pressurize, and pressurized water is injected into a coal seam sequentially through a flow stopping valve, a flow dividing area and a water injection pipe. After the water in one of the water tanks 1 is discharged, the other water tanks 1 are operated in the same way, and then the water tanks 1 can automatically and alternately supply water to the water injection pump.
A source-saving device for improving the wetting effect of coal seam water injection comprises a water tank 1, wherein a dispersed gas input pipe 6 is connected to the bottom of the water tank 1, a plurality of shunt pipelines 7 are uniformly distributed in the water tank 1 from top to bottom, the shunt pipelines 7 are communicated through a vertical pipeline 8 arranged on one side, the vertical pipeline 8 is communicated with the dispersed gas input pipe 6, and a piston body 9 for controlling whether the shunt pipelines 7 circulate dispersed gas or not is arranged in the vertical pipeline 8; an opening is formed above the vertical pipeline 8, a vertical rod 10 is arranged in the water tank 1 on one side of the vertical pipeline 8, a plurality of transverse holes 11 are formed in the vertical rod 10 from top to bottom, and sliding blocks 12 are movably arranged in the transverse holes 11; the vertical pipe 8 is provided with first trip 13 outward, first trip 13 with be provided with connecting rod 14 between the piston body 9, slider 12 is close to first trip 13 one side is provided with second trip 15, and the opposite side is provided with first articulated seat 16 the montant 10 lateral wall of cross bore 11 top is provided with perpendicular axle bed 17, perpendicular axle bed 17 internalization is provided with vertical axis 18, vertical axis 18 upper end is provided with kickboard 19, and the lower extreme is provided with the articulated seat 20 of second, the articulated seat 20 of second with it has connecting rod 21 to articulate between the first articulated seat 16.
The distribution pipeline 7 of the present invention is provided with a plurality of distribution holes 200.
The number of the transverse holes 11 is the same as that of the diversion pipelines 7, and the transverse holes are arranged in a one-to-one transverse alignment mode.
The first hook 13 and the piston body 9 have the same horizontal position.
In order to fully add bubbles into water, a dispersing gas input pipe 6 is connected with a dispersing gas input device, and the dispersing gas input pipe 6 inputs dispersing gas into the water tank 1; according to the liquid water level in the water tank, a plurality of floating plates 19 which are vertically arranged automatically float upwards, after the floating plates 19 which are contacted with the liquid float upwards, the sliding block 12 on the corresponding side is pulled through the connecting rod 21, the sliding block 12 moves to one side, the second clamping hook 15 on the other side is separated from the first clamping hook 13, the first clamping hook 13 unlocks the height, the piston body 9 automatically rises under the pressure of gas and the buoyancy force, the piston body rises to the position of the second clamping hook 15 which does not move upwards, the first clamping hook 13 and the second clamping hook 15 limit the piston body 9 to move upwards, at the moment, the corresponding external shunt pipeline 7 cannot be communicated with the gas, the shunt pipeline 7 in the liquid can be ensured to spray the dispersed gas, the gas is fully fused in the water, after the water level descends, the piston body 9 automatically descends under the action of gravity, the first clamping hook 13 and the second clamping hook 15 are arranged in a reversed hook mode, at the moment, the first clamping hook 13 can cross the, the second hook 15 is pressed and retracted to descend to a proper position, so that the gas is sprayed out only from the shunt pipeline 7 in the liquid, and resources are saved.
While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A method for improving the wetting effect of coal seam water injection is characterized by comprising the following steps: the method comprises the steps of firstly, arranging more than two water tanks (1), and respectively connecting a water inlet (2) and a water outlet (3) to the water tanks (1); the water inlet (2) is communicated with a micro-nano bubble generating device (4), and the micro-nano bubble generating device (4) is communicated with an external water delivery device; an electromagnetic valve (5) is arranged at the position of the water outlet (3) to control the plurality of water tanks (1) to alternately discharge bubble water;
step two, a dispersed gas input pipe (6) inputs dispersed gas into a plurality of shunt pipelines (7), secondary nano bubble treatment is carried out on liquid in the water tank (1), a floating plate (19) at a corresponding position rises according to the liquid water level height in the water tank (1), after rising, a first clamping hook (13) at the corresponding position is pulled to one side, a second clamping hook (15) is separated from the first clamping hook (13), the second clamping hook (15) unlocks the first clamping hook (13) at the corresponding horizontal height, an inner piston body (9) moves upwards due to the acting force of the dispersed gas, the shunt pipelines (7) at the liquid water level height are opened to admit air, and secondary nano bubble treatment is carried out on the liquid in the water tank (1);
and step three, after the liquid is static in the water tank (1) for a period of time, the water outlet (3) injects the liquid into the coal bed through the booster pump (22).
2. The method for improving the wetting effect of coal seam injection water according to claim 1, wherein the method comprises the following steps: a floating ball is arranged in the water tank (1), and after rising along with the water level, the floating ball pushes a piston in a valve body into the valve body through a connecting rod, so that the purpose of automatically closing a floating ball valve (100) arranged in the water tank (1) is achieved.
3. The source-saving method for improving the wetting effect of coal seam water injection according to claim 1, characterized by comprising the following steps: the micro-nano bubble generating device (4) is explosion-proof.
4. The source-saving method for improving the wetting effect of coal seam water injection according to claim 1, characterized by comprising the following steps: and a check valve (23), a pressure gauge (24) and a filter (25) are arranged on the water outlet (3).
5. The utility model provides an improve festival source device of moist effect of coal seam water injection, includes water tank (1), its characterized in that: a dispersed gas input pipe (6) is connected to the bottom of a water tank (1), a plurality of shunt pipelines (7) are uniformly distributed in the water tank (1) from top to bottom, the shunt pipelines (7) are communicated through a vertical pipeline (8) arranged on one side, the vertical pipeline (8) is communicated with the dispersed gas input pipe (6), and a piston body (9) used for controlling whether the shunt pipelines (7) circulate dispersed gas or not is arranged in the vertical pipeline (8); an opening is formed above the vertical pipeline (8), a vertical rod (10) is arranged in the water tank (1) on one side of the vertical pipeline (8), a plurality of transverse holes (11) are formed in the vertical rod (10) from top to bottom, and a sliding block (12) is movably arranged in each transverse hole (11); erect pipeline (8) and be provided with first trip (13) outward, first trip (13) with be provided with connecting rod (14) between piston body (9), slider (12) are close to first trip (13) one side is provided with second trip (15), and the opposite side is provided with first articulated seat (16) montant (10) lateral wall of cross bore (11) top is provided with perpendicular axle bed (17), erect axle bed (17) internalization and be provided with vertical axis (18), vertical axis (18) upper end is provided with kickboard (19), and the lower extreme is provided with the articulated seat of second (20), the articulated seat of second (20) with it has connecting rod (21) to articulate between first articulated seat (16).
6. The source-saving device for improving the wetting effect of coal seam water injection according to claim 5, wherein: the shunting pipeline (7) is provided with a plurality of shunting holes (200).
7. The source-saving device for improving the wetting effect of coal seam water injection according to claim 5, wherein: the number of the transverse holes (11) is the same as that of the diversion pipelines (7), and the transverse holes are arranged in a one-to-one transverse alignment mode.
8. The source-saving device for improving the wetting effect of coal seam water injection according to claim 5, wherein: the horizontal positions of the first clamping hook (13) and the piston body (9) are the same.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110370729.8A CN113006792B (en) | 2021-04-07 | 2021-04-07 | Energy-saving device and method for improving coal seam water injection wetting effect |
| CN202310642648.8A CN116658161A (en) | 2021-04-07 | 2021-04-07 | Method for improving wettability of coal seam water injection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110370729.8A CN113006792B (en) | 2021-04-07 | 2021-04-07 | Energy-saving device and method for improving coal seam water injection wetting effect |
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| CN202310642648.8A Division CN116658161A (en) | 2021-04-07 | 2021-04-07 | Method for improving wettability of coal seam water injection |
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| CN202310642648.8A Pending CN116658161A (en) | 2021-04-07 | 2021-04-07 | Method for improving wettability of coal seam water injection |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202007682U (en) * | 2011-03-07 | 2011-10-12 | 方齐 | Pneumatic water injection device for mining coal seams |
| CN104806283A (en) * | 2015-05-04 | 2015-07-29 | 安徽理工大学 | Bubble dedusting system for air dust in mine roadway |
| CN207879373U (en) * | 2017-12-21 | 2018-09-18 | 华明国 | Inhibit coal and gas prominent device |
| CN210829192U (en) * | 2019-11-21 | 2020-06-23 | 濮阳市顺康石油工程技术有限公司 | Foaming gas injection device for acidification |
| CN111764956A (en) * | 2020-08-10 | 2020-10-13 | 西安科技大学 | Gas and coal dust cooperative prevention and control device and method for fully mechanized coal mining face magnetized surfactant |
-
2021
- 2021-04-07 CN CN202110370729.8A patent/CN113006792B/en active Active
- 2021-04-07 CN CN202310642648.8A patent/CN116658161A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202007682U (en) * | 2011-03-07 | 2011-10-12 | 方齐 | Pneumatic water injection device for mining coal seams |
| CN104806283A (en) * | 2015-05-04 | 2015-07-29 | 安徽理工大学 | Bubble dedusting system for air dust in mine roadway |
| CN207879373U (en) * | 2017-12-21 | 2018-09-18 | 华明国 | Inhibit coal and gas prominent device |
| CN210829192U (en) * | 2019-11-21 | 2020-06-23 | 濮阳市顺康石油工程技术有限公司 | Foaming gas injection device for acidification |
| CN111764956A (en) * | 2020-08-10 | 2020-10-13 | 西安科技大学 | Gas and coal dust cooperative prevention and control device and method for fully mechanized coal mining face magnetized surfactant |
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| Publication number | Publication date |
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| CN113006792B (en) | 2023-08-11 |
| CN116658161A (en) | 2023-08-29 |
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