CN112483165A - Hydraulic punching coal water-gas separator - Google Patents

Hydraulic punching coal water-gas separator Download PDF

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Publication number
CN112483165A
CN112483165A CN202011518361.7A CN202011518361A CN112483165A CN 112483165 A CN112483165 A CN 112483165A CN 202011518361 A CN202011518361 A CN 202011518361A CN 112483165 A CN112483165 A CN 112483165A
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China
Prior art keywords
water
slag
screen
separation barrel
guide ring
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CN202011518361.7A
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Chinese (zh)
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CN112483165B (en
Inventor
朱红青
张逸龙
高荣翔
李峰
廖奇
方书昊
霍雨佳
陆新晓
吴彦
郭晋麟
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Priority to CN202011518361.7A priority Critical patent/CN112483165B/en
Publication of CN112483165A publication Critical patent/CN112483165A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/006Production of coal-bed methane
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • E21B43/26Methods for stimulating production by forming crevices or fractures
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34Arrangements for separating materials produced by the well
    • E21B43/38Arrangements for separating materials produced by the well in the well

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention discloses a hydraulic punching coal water-gas separator, which relates to the technical field of mine safety and comprises a separation barrel, wherein a separation barrel cover is arranged at the top of the separation barrel, and a water slag gas inlet and a gas outlet are respectively arranged on two sides of the upper surface of the separation barrel cover; a grain slag separating screen is obliquely arranged on the upper side in the separating barrel, the left side of the grain slag separating screen is higher than the right side of the grain slag separating screen, and a slag discharging port is arranged above the right side of the grain slag separating screen; a water slag filter screen is arranged below the water slag separation screen, a slotted hole is arranged above the left side of the water slag filter screen, and a drain hole is arranged at the bottom of one side of the separation barrel; the water-slag separating screen is characterized in that a first hammer block is arranged below the water-slag separating screen, a second hammer block is arranged below the water-slag filtering screen, and the driving system drives the first hammer block and the second hammer block to respectively hammer and vibrate the water-slag separating screen and the water-slag filtering screen. The invention can separate, discharge and collect the mixture of gas, water, coal slag and the like, effectively avoids the problem of gas overrun caused by spray holes and also improves the space environment of a drilling site.

Description

Hydraulic punching coal water-gas separator
Technical Field
The invention relates to the technical field of mine safety, in particular to a hydraulic punching coal water-gas separator.
Background
The method is characterized in that under the shielding of a rock (coal) column, after drilling construction, medium-high pressure water is adopted to impact coal bodies around a drill hole through a high-efficiency nozzle to flush out a large amount of coal bodies and gas, stress is concentrated to move around the drill hole, so that the pressure of the coal bodies around the drill hole is relieved and the permeability is increased, and the drainage effect is effectively improved.
In the prior art, the key point of outburst elimination measures is that a large amount of gas is pumped and exhausted between punching holes and after the punching holes; secondly, the coal can be flushed out with a certain amount to form a pressure relief space for coal movement. However, the hydraulic punching also directly causes a large amount of gas to flow out and a large amount of coal-water mixture to be discharged in the punching process, and even causes the problems of spraying holes, protrusion and the like.
In order to effectively collect gas and ensure the working conditions of a drilling site and the cleaning of a roadway, a coal-water-gas separation device is required to be equipped, but the existing coal-water-gas separation device has the following defects: 1. a hole plugging situation can occur; 2. after the corresponding valve is opened, the coal rushed out of the valve flows into the roadway and is not clean, so that the environmental pollution is caused.
Therefore, a new hydraulic punching coal water-gas separator is needed to be developed to solve the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a hydraulic punching coal-water-gas separator, which solves the problems in the prior art, can avoid gas overrun caused by drilling and spraying holes, can solve the problem of coal-water turbulent flow, and ensures standardized management of a drainage site.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a hydraulic punching coal water-gas separator which comprises a separation barrel, wherein a separation barrel cover is arranged at the top of the separation barrel, and a water granulated slag gas inlet and a gas outlet are respectively arranged on two sides of the upper surface of the separation barrel cover; a grain slag separating screen is obliquely arranged on the upper side in the separating barrel, the left side of the grain slag separating screen is higher than the right side of the grain slag separating screen, and a slag discharging port is formed in the right side of the grain slag separating screen; a water slag filter screen is arranged below the water slag separation screen, a slotted hole is formed above the left side of the water slag filter screen, and a drain hole is formed in the bottom of one side of the separation barrel; the utility model discloses a water-granulated slag separating sieve, including water-granulated slag filter screen, water-granulated slag separating sieve's below is provided with first hammer block, the below of water-granulated slag filter screen is provided with the second hammer block, first hammer block with the second hammer block is connected with actuating system, actuating system is used for driving first hammer block with the second hammer block is right respectively the water-granulated slag separating sieve and the water-granulated slag filter screen carries out the hammering vibrations.
Preferably, the driving system comprises a driving motor, the driving motor is installed below the grain slag filter screen through a positioning rod, the right side of the positioning rod is fixed on the lower side of the right side wall of the separation barrel, and the driving motor is installed on the left side of the positioning rod; a guide plate is arranged above the driving motor, the right side of the guide plate is fixed to the lower side of the right side wall of the separation barrel, and a first guide ring is mounted on the left side of the guide plate;
a sliding rod is vertically arranged in the first guide ring, a third guide ring is fixedly arranged in the middle of the granulated slag filter screen, the third guide ring is arranged opposite to the first guide ring in a vertical direction, the top of the sliding rod upwards penetrates through the third guide ring, the bottom of the sliding rod downwards penetrates through the first guide ring, and the sliding rod is slidably arranged in the first guide ring and the third guide ring;
the bottom of the sliding rod is fixedly provided with a push plate, the push plate is positioned below the driving motor, the middle part of the driving motor is provided with a turntable, the side surface of the turntable is fixedly provided with a push rod, the driving motor drives the push rod to rotate, and the push rod pushes the push plate to move up and down; a first spiral spring is arranged between the push plate and the first guide ring and sleeved on the lower side of the sliding rod;
the top of the sliding rod is fixedly provided with the first hammer block; the slide bar is also fixedly provided with an installation plate, the installation plate is positioned between the guide plate and the grain slag filter screen, and the installation plate is also provided with the second hammer block; the first guide ring and between the mounting plates are sleeved with a second spiral spring on the sliding rod.
Preferably, the middle part of the mounting plate is fixedly mounted on the sliding rod through a second guide ring; the mounting plate is fixedly provided with a screw rod, and the second hammer block is fixedly arranged at the top of the screw rod.
Preferably, the screw rods are uniformly provided with a plurality of screw rods, and the top of each screw rod is fixedly provided with one second hammer block.
Preferably, the driving motor is a waterproof motor.
Preferably, the grain slag separating screen is detachably arranged on the upper side inside the separating barrel through a turnbuckle, and the screen holes of the grain slag separating screen are in a strip-shaped design; the grain slag filter screen is of a net structure.
Preferably, the top of the separation barrel is fixedly provided with a connection barrel, and the separation barrel cover is mounted on the top of the connection barrel through a barrel cover bolt.
Preferably, the granulated slag gas inlet is obliquely arranged.
Preferably, the left side of the grain slag separating screen is provided with an anti-blocking hole.
Preferably, the bottom of the front surface of the separation barrel is provided with a sludge outlet.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention has small occupied space, can separate, discharge and collect the generated mixture of gas, water, coal slag and the like in the punching process, and effectively avoids the problem of gas overrun caused by the spray holes; the environment of the drill site space is also improved; the invention is convenient to process, simple and convenient to operate, safe and reliable; the water-slag separation effect is good, and the water and slag can be drained and discharged continuously during punching; the cleaning period is long; the cinder can be collected by grades, which is beneficial to weighing analysis.
In addition, the water-slag separating sieve adopts a semi-closed state, the separating barrel cover can also be taken out, the water-slag separating sieve can move to clean, and the water-slag filtering net can vibrate the filtering net through the guide ring through the waterproof motor; the anti-blocking hole can be used as an anti-blocking cinder device, can also play a role in sealing, and can also discharge dregs accumulated in a large amount of cinder in a long time through the anti-blocking drilling tool; the slotted hole valve and the mud outlet can be cleaned by using related tools, the service life of the motor is effectively prolonged by the aid of the arrangement of the waterproof motor, the push rod is driven to rotate by the motor, the water-slag separating sieve and the water-slag filtering net can be knocked by the first hammer block and the second hammer block, and accordingly impurities on the water-slag separating sieve and the water-slag filtering net can be dredged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hydraulic punching coal water-gas separator of the invention.
FIG. 2 is a top view of the granulated slag filter screen according to the present invention.
FIG. 3 is a top view of the grain slag separating screen of the present invention.
In the figure: 1. the device comprises a barrel cover bolt, 2, a separation barrel cover, 3, a grain slag gas inlet, 4, a gas outlet, 5, a connecting barrel, 6, a separation barrel, 7, a slag discharge port, 8, a first hammer block, 9, a sliding rod, 10, a grain slag filter screen, 11, a guide plate, 12, a positioning rod, 13, a push rod, 14, a rotary disc, 15, a driving motor, 16, a mud outlet, 17, a push plate, 18, a first spiral spring, 19, a first guide ring, 20, a second spiral spring, 21, a mounting plate, 22, a screw rod, 23, a second hammer block, 24, a second guide ring, 25, a third guide ring, 26, a water discharge hole, 27, a slotted hole, 28, a grain slag separation screen, 29 and an anti-blocking hole.
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.
Example one
As shown in fig. 1-3, the embodiment provides an improved hydraulic punching coal water-gas separator, which mainly includes a separation barrel 6, a connection barrel 5 is fixedly installed on the upper side of the separation barrel 6, a separation barrel cover 2 is installed above the connection barrel 5, barrel cover bolts 1 are evenly installed between the separation barrel cover 2 and the connection barrel 5, a water-slag gas inlet 3 is fixedly installed on the left side of the upper surface of the separation barrel cover 2, a gas outlet 4 is fixedly installed on the right side of the upper surface of the separation barrel cover 2, a water-slag separation sieve 28 is obliquely installed on the upper side inside the separation barrel 6, an anti-blocking hole 29 is arranged on the left side of the water-slag separation sieve 28, a slag discharge hole 7 is arranged on the right side of the water-slag separation sieve 28, a slotted hole 27 is installed in the middle of the left side of the separation barrel 6, a water-slag filter screen 10 is installed below the.
In this embodiment, the cut holes 27 and the mud outlets 16 are provided with control valves, for example, the cut holes 27 are provided with cut hole valves, and the mud outlets 16 are provided with mud outlet valves.
In the embodiment, a third guide ring 25 is fixedly installed in the middle of the granulating slag filter screen 10, a positioning rod 12 is fixedly installed on the lower side of the right side wall inside the separation barrel 6, a driving motor 15 is fixedly installed at the left end of the positioning rod 12, a rotary disc 14 is installed in the middle of the driving motor 15, a push rod 13 is fixedly installed on the side surface of the rotary disc 14, a guide plate 11 is arranged above the positioning rod 12, a first guide ring 19 is fixedly installed on the left side of the plate surface of the guide plate 11, a first spiral spring 18 is fixedly installed on the lower side of the first guide ring 19, a slide rod 9 is sleeved inside the first spiral spring 18, a push plate 17 is fixedly installed at the lower end of the slide rod 9, a second spiral spring 20 is fixedly installed on the upper side of the first guide ring 19, a second guide ring 24 is fixedly installed on the upper side of the second spiral spring 20, a mounting plate 21 is, the upper end of the slide rod 9 is fixedly provided with a first hammer block 8.
In the present embodiment, the grain slag separating screen 28 is disposed obliquely and has a strip-shaped design, and the grain slag filtering screen 10 has a net-shaped structure. Moreover, the grain slag separating screen 28 is detachably mounted on the upper side inside the separating barrel 6 through a turnbuckle; specifically, a plurality of threaded holes are uniformly formed in the outer edge of the water-slag separating screen 28, a plurality of through holes are correspondingly formed in the side wall of the separating barrel 6, the through holes penetrate through the through holes in the side wall of the separating barrel 6 through screw holes formed in the outer side, then the through holes are screwed into the threaded holes in the outer edge of the water-slag separating screen 28, and the threaded holes are screwed tightly to realize fixation; after the separation barrel cover 2 is opened, the water-slag separation sieve 28 can be detached by unscrewing the outer side turnbuckle, and the water-slag separation sieve is convenient to clean after being taken out.
In this embodiment, the slide rod 9 is slidably fitted with the third guide ring 25 and the first guide ring 19 and fixedly connected with the second guide ring 24.
In the present embodiment, the drive motor 15 is a waterproof motor.
In the present embodiment, the granulated slag gas inlet 3 is arranged obliquely.
The working principle of the hydraulic punching coal-water separator in the embodiment is as follows:
the top of the separation barrel 6 is provided with a grain slag gas inlet 3, a gas outlet 4 and a separation barrel cover 2, wherein the lower part of the separation barrel cover 2 is fixed by a circle of barrel cover bolts 1, and the separation barrel cover 2 can be freely taken; in the hydraulic punching experiment process, the flushed coal water gas enters the separation barrel 6 through the water slag gas inlet 3, the gas outlet 4 can be connected with a gas drainage pipeline, and the gas contained in the separation barrel 6 is drained through the gas drainage pipeline of the gas outlet 4; because the density of the gas is smaller than that of the air, the gas can escape from the gas outlet 4, and further, an exhaust device can be arranged on the gas drainage pipeline according to requirements.
Filtering and separating the coal body flushed into the hydraulic punching coal water-gas separator: two layers of filtering devices, namely a grain slag separating screen 28 and a grain slag filtering screen 10, are arranged in the separating barrel 6, if too much coal exists, anti-blocking holes 29 and cut-out holes 27 are respectively arranged on the left side wall of the separating barrel 6 at the upper and lower positions of the grain slag separating screen 28, so that the coal above the grain slag separating screen 28 and the grain slag filtering screen 10 can be cleaned conveniently; or the separation barrel cover 2 can be opened under the power-off state, and the grain slag separation sieve 28 can be taken out for cleaning. A slag discharging port 7 is arranged on the right side wall of the grain slag separating screen 28, so that coal which does not pass through the grain slag separating screen 28 or is not precipitated is discharged through the slag discharging port 7, and a large amount of coal bodies flushed out are prevented from being blocked or blocked; by adopting the structure, coal water in the separation barrel 6 can be separated and discharged, and blocked coal can be cleaned regularly; and the bottom of the separation barrel 6 is provided with a mud outlet 16, so that the precipitated coal slag can be discharged out of a roadway through a drill site space by utilizing the mud outlet 16,
the embodiment can solve the problems of large gas gushing out, spray holes and outflow of coal-water-gas mixture in the hydraulic punching process, and can also save the utilization of the space of a drilling site.
Meanwhile, the driving motor 15 is powered on, the driving motor 15 drives the rotary disc 14 to rotate, the push rod 13 is further driven to rotate, and the push plate 17 is repeatedly pushed by the push rod 13, so that the first hammer block 8 and the second hammer block 23 are driven to beat the water-slag separating screen 28 and the water-slag filtering screen 10, and the blockage can be further prevented.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. The hydraulic punching coal water-gas separator is characterized in that: the separation barrel comprises a separation barrel, wherein a separation barrel cover is arranged at the top of the separation barrel, and a grain slag gas inlet and a gas outlet are respectively arranged on two sides of the upper surface of the separation barrel cover; a grain slag separating screen is obliquely arranged on the upper side in the separating barrel, the left side of the grain slag separating screen is higher than the right side of the grain slag separating screen, and a slag discharging port is formed in the right side of the grain slag separating screen; a water slag filter screen is arranged below the water slag separation screen, a slotted hole is formed above the left side of the water slag filter screen, and a drain hole is formed in the bottom of one side of the separation barrel; the utility model discloses a water-granulated slag separating sieve, including water-granulated slag filter screen, water-granulated slag separating sieve's below is provided with first hammer block, the below of water-granulated slag filter screen is provided with the second hammer block, first hammer block with the second hammer block is connected with actuating system, actuating system is used for driving first hammer block with the second hammer block is right respectively the water-granulated slag separating sieve and the water-granulated slag filter screen carries out the hammering vibrations.
2. The hydraulically punched coal-water separator as claimed in claim 1, wherein: the driving system comprises a driving motor, the driving motor is arranged below the grain slag filter screen through a positioning rod, the right side of the positioning rod is fixed on the lower side of the right side wall of the separation barrel, and the driving motor is arranged on the left side of the positioning rod; a guide plate is arranged above the driving motor, the right side of the guide plate is fixed to the lower side of the right side wall of the separation barrel, and a first guide ring is mounted on the left side of the guide plate;
a sliding rod is vertically arranged in the first guide ring, a third guide ring is fixedly arranged in the middle of the granulated slag filter screen, the third guide ring is arranged opposite to the first guide ring in a vertical direction, the top of the sliding rod upwards penetrates through the third guide ring, the bottom of the sliding rod downwards penetrates through the first guide ring, and the sliding rod is slidably arranged in the first guide ring and the third guide ring;
the bottom of the sliding rod is fixedly provided with a push plate, the push plate is positioned below the driving motor, the middle part of the driving motor is provided with a turntable, the side surface of the turntable is fixedly provided with a push rod, the driving motor drives the push rod to rotate, and the push rod pushes the push plate to move up and down; a first spiral spring is arranged between the push plate and the first guide ring and sleeved on the lower side of the sliding rod;
the top of the sliding rod is fixedly provided with the first hammer block; the slide bar is also fixedly provided with an installation plate, the installation plate is positioned between the guide plate and the grain slag filter screen, and the installation plate is also provided with the second hammer block; the first guide ring and between the mounting plates are sleeved with a second spiral spring on the sliding rod.
3. The hydraulically punched coal-water separator as claimed in claim 2, wherein: the middle part of the mounting plate is fixedly mounted on the sliding rod through a second guide ring; the mounting plate is fixedly provided with a screw rod, and the second hammer block is fixedly arranged at the top of the screw rod.
4. The hydraulically punched coal-water-gas separator of claim 3, wherein: the screw rod is evenly provided with a plurality of, every the top of screw rod all fixed mounting have one the second hammer block.
5. The hydraulically punched coal-water separator as claimed in claim 2, wherein: the driving motor is a waterproof motor.
6. The hydraulically punched coal-water separator as claimed in claim 1, wherein: the grain slag separating screen is detachably arranged on the upper side inside the separating barrel through a turnbuckle, and the screen holes of the grain slag separating screen are in a strip-shaped design; the grain slag filter screen is of a net structure.
7. The hydraulically punched coal-water separator as claimed in claim 1, wherein: the top of the separation barrel is fixedly provided with a connecting barrel, and the separation barrel cover is arranged on the top of the connecting barrel through a barrel cover bolt.
8. The hydraulically punched coal-water separator as claimed in claim 1, wherein: the water granulated slag gas inlet is obliquely arranged.
9. The hydraulically punched coal-water separator as claimed in claim 1, wherein: and the left side of the water-slag separating screen is provided with an anti-blocking hole.
10. The hydraulically punched coal-water separator as claimed in claim 1, wherein: and a sludge outlet is formed in the bottom of the front surface of the separation barrel.
CN202011518361.7A 2020-12-21 2020-12-21 Hydraulic punching coal water-gas separator Active CN112483165B (en)

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CN202011518361.7A CN112483165B (en) 2020-12-21 2020-12-21 Hydraulic punching coal water-gas separator

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CN112483165B CN112483165B (en) 2022-04-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116856903A (en) * 2023-09-04 2023-10-10 中国矿业大学 Coal mine gas outburst prevention and treatment extraction device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1071764A1 (en) * 1982-11-23 1984-02-07 Уральский филиал Всесоюзного научно-исследовательского и проектного института галургии Method of degassing a body of potassium-containing rock
CN85204041U (en) * 1985-09-11 1986-09-24 湖南省煤炭科学研究所 Pneumatic chip removal device for dry drilling
CN102392676A (en) * 2011-09-14 2012-03-28 成都晟鑫机电设备有限公司 Integrated device for separating gas, water and slag
CN106968704A (en) * 2017-04-19 2017-07-21 淮北矿业(集团)有限责任公司 Gas drainage pipeline negative pressure dust removing device
CN211384076U (en) * 2019-12-24 2020-09-01 菏泽学院 Small-size filtration equipment of fertilizer preparation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1071764A1 (en) * 1982-11-23 1984-02-07 Уральский филиал Всесоюзного научно-исследовательского и проектного института галургии Method of degassing a body of potassium-containing rock
CN85204041U (en) * 1985-09-11 1986-09-24 湖南省煤炭科学研究所 Pneumatic chip removal device for dry drilling
CN102392676A (en) * 2011-09-14 2012-03-28 成都晟鑫机电设备有限公司 Integrated device for separating gas, water and slag
CN106968704A (en) * 2017-04-19 2017-07-21 淮北矿业(集团)有限责任公司 Gas drainage pipeline negative pressure dust removing device
CN211384076U (en) * 2019-12-24 2020-09-01 菏泽学院 Small-size filtration equipment of fertilizer preparation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116856903A (en) * 2023-09-04 2023-10-10 中国矿业大学 Coal mine gas outburst prevention and treatment extraction device
CN116856903B (en) * 2023-09-04 2023-11-10 中国矿业大学 Coal mine gas outburst prevention and treatment extraction device

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