CN113217082A - Gas, water and coal slag separation device and separation method for coal mine gas extraction pipeline - Google Patents
Gas, water and coal slag separation device and separation method for coal mine gas extraction pipeline Download PDFInfo
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- CN113217082A CN113217082A CN202110577879.6A CN202110577879A CN113217082A CN 113217082 A CN113217082 A CN 113217082A CN 202110577879 A CN202110577879 A CN 202110577879A CN 113217082 A CN113217082 A CN 113217082A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 328
- 239000002893 slag Substances 0.000 title claims abstract description 254
- 239000007789 gas Substances 0.000 title claims abstract description 198
- 239000003245 coal Substances 0.000 title claims abstract description 165
- 238000000605 extraction Methods 0.000 title claims abstract description 94
- 238000000926 separation method Methods 0.000 title claims abstract description 49
- 238000003860 storage Methods 0.000 claims abstract description 149
- 230000000694 effects Effects 0.000 claims abstract description 18
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 26
- 239000003818 cinder Substances 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 19
- 239000011358 absorbing material Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- 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
- E21F16/00—Drainage
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Abstract
The invention relates to a gas, water and coal slag separating device for a coal mine gas extraction pipeline, which comprises a grain slag storage, an inlet pipeline and an outlet pipeline of the grain slag storage, wherein a gas, water and coal slag separator is arranged in a storage cavity of the slag storage; mixed gas containing water and coal slag is discharged into the cavity of the storage device through the inlet pipeline, the separation treatment of gas, water and coal slag is carried out, and the gas after the separation treatment is discharged from the outlet pipeline; the automatic water draining device is arranged at the bottom of the storage cavity at one end of the outlet pipeline and is used for draining the separated water. The invention also provides a gas, water and coal slag separation method, which comprises three separation steps of reducing the wind speed, blocking the separator, absorbing water by the water absorption saturated material, intercepting the gas, water and slag separation water curtain again and settling dust. The coal seam gas separation device is simple in structure and good in separation effect, improves gas extraction efficiency, and can be popularized and used in similar coal seam gas extraction.
Description
Technical Field
The invention relates to a coal bed gas extraction device, in particular to a gas, water and slag separation device and method for an extraction pipeline.
Background
In the coal mining process, because a large amount of gas exists in the coal seam, in order to realize safe and green mining, the gas needs to be extracted from the coal seam and collected for recycling, and the current coal seam gas extraction mode is mainly negative pressure extraction. In the gas extraction process, water, coal slag and the like contained in the coal seam enter a gas extraction pipeline under the action of negative pressure, the water and the coal slag are gradually accumulated in the gas extraction pipeline to block the gas extraction pipeline, gas is difficult to enter a main extraction pipe in time, the gas extraction is affected, potential hazards are brought to the safe production of coal mines, and therefore the water and the coal slag need to be discharged in time.
The prior gas extraction water drainage and slag discharge device monitors the water level in a water tank through a water level detection device such as a float and the like, automatically drains and discharges slag when the atmosphere is conducted, because the gas extraction process adopts negative pressure extraction, the water tank is full of water slag and needs to stop the negative pressure extraction, the atmosphere is conducted to automatically drain and discharge slag, so that the gas extraction process and the water drainage and slag discharge process cannot be simultaneously carried out and mutually influenced, the gas extraction cannot be continuous, periodic intervals exist, and the gas extraction efficiency is reduced. In the gas extraction process, a large amount of water vapor exists in the gas, and the gas drying process is still needed in the later stage, so that the water content of the gas is reduced, and the gas concentration is improved. At present, most of gas extraction devices do not solve the problem of high gas water content; at present, most of gas extraction devices do not have a device automatic cleaning function, need manual cleaning, and have a series of problems of difficulty in cleaning the device, unclean cleaning, large labor capacity, difficulty in operation and the like, so that the equipment maintenance is not enough, and the service life of the equipment is reduced.
The coal mine gas extraction pipeline has various technical problems to be solved in the aspects of gas, water and slag separation, drainage and the like. Firstly, due to the negative pressure effect in the gas extraction pipeline, the wind speed of the extraction pipeline is high, so that a large amount of coal slag is mixed in the extraction pipeline, the coal slag is substituted into the extraction pipeline under the extraction negative pressure effect, the extraction pipeline is easy to block, and the extraction effect is seriously influenced; secondly, water in the gas extraction process is accumulated in the extraction pipeline and is mixed with coal slag to form coal slime, so that the extraction pipeline is easily blocked, and the extraction effect is also seriously influenced; moreover, the traditional drainage and deslagging device for the extraction pipeline has the defects of incapability of realizing an automatic drainage function, high cost, complex structure, poor drainage and deslagging effects and the like. Therefore, the device for automatically separating gas, water and slag and draining and deslagging the coal mine gas extraction pipeline is developed, and has important significance for ensuring the gas extraction effect.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the automatic gas, water and slag separating device and the automatic gas, water and slag separating method for the gas extraction pipeline, which have the advantages of simple structure, good gas, water and slag separating effect, gas extraction efficiency improvement and convenience in operation.
In order to achieve the purpose, the invention adopts the technical scheme that: a gas, water and coal slag separating device for a coal mine gas extraction pipeline comprises a grain slag storage, an inlet pipeline and an outlet pipeline of the grain slag storage, wherein a gas, water and coal slag separator is arranged in a storage cavity of the slag storage; the gas, water and coal slag separator is used for separating gas, water and coal slag from the mixed gas, and the separated gas is discharged from the outlet pipeline; a slag discharge pipe is arranged at the bottom of the cavity of the grain slag storage, and a slag discharge valve is arranged on the slag discharge pipe to discharge coal slag after separation treatment;
the automatic water draining device is arranged at the bottom of the storage cavity at one end of the outlet pipeline and is used for draining the separated water;
the separator cavity of the gas, water and coal slag separator is arranged on the top surface of the storage cavity in an extending mode, the distance between the inlet end of the separator cavity and the inlet end of the storage cavity is 300-500 mm, the inlet end of the storage cavity is just one end of an inlet pipeline of the storage cavity, the length of the separator cavity is 1/3-1/2 of the length of the storage cavity, and the length of the storage cavity is generally 1.6-2.0 m; the center line of the separator cavity is superposed with the center lines of the inlet pipeline and the outlet pipeline; the mixed gas flow entering the cavity of the storage device is ensured to pass through the gas-water-coal slag separator.
Further, the gas, water and coal slag separator comprises a water storage tank and at least two filtering sieve plates,
the water storage tank is arranged in the storage cavity through at least two filtering sieve plates, and the top surface of the storage cavity of the grain slag storage, the at least two filtering sieve plates and the water storage tank enclose a separator cavity of the gas-water-coal slag separator;
the filtering sieve plate is provided with sieve pores, and the coal slag in the mixed gas falls into the bottom of the grain slag storage under the blocking action of the filtering sieve plate; the separator cavity is filled with a water absorbing material, the water absorbing material absorbs water and residual coal cinder in the mixed gas which passes through the sieve pores and enters the separator cavity, and water seeped after the water absorbing material is saturated is stored in the water storage tank;
the water storage tank is arranged on the bottom surface of the water storage tank, and is communicated with the water storage tank;
the setting direction of the drainage channel is vertical to the extending direction of the separator cavity, water discharged from the grain slag discharge hole forms a water curtain, and the mixed gas bypassing the separator cavity is separated into gas, water and coal slag through the water curtain.
Furthermore, the diameter of the holes of the sieve arranged on the filtering sieve plate is 1-2 mm, and the coal cinder larger than the diameter directly sinks to the bottom of the grain cinder storage device due to the blocking of the filtering sieve plate.
Furthermore, the number of the drainage grooves is at least three, the drainage grooves are arranged at the bottom of the water storage tank in parallel and uniformly distributed mode, and the cross section of each drainage groove is a cube of 0.5-1 cm multiplied by 0.5-1 cm;
furthermore, the hole interval of a drainage slag drainage hole is 4-5 cm, and the diameter of a single hole of the drainage slag drainage hole is a circular hole with the diameter of 2-3 mm.
Further, the automatic drainage device is a siphon U-shaped drainage pipe, the height difference H between a water inlet and a water outlet of the siphon U-shaped drainage pipe is more than or equal to P/rho H, wherein P is the maximum negative pressure in the extraction pipeline, rho is the density of water, and H is the height difference between the water inlet and the water surface in the cavity of the storage; the water outlet extends out of the storage cavity, and a plug is further arranged at the end part of the water outlet.
Further, the section of the cavity of the water granulated slag storage is circular; the diameter of the circular section of the storage cavity is 1.5-2.5 times of the diameter of the inlet pipeline and the outlet pipeline.
Furthermore, the inlet pipeline is used for communicating and installing the gas, water and coal slag separation device at the lowest part of the main extraction pipeline through a flange.
The invention also provides a gas, water and coal slag separation method of the gas, water and coal slag separation device for the coal mine gas extraction pipeline, which comprises the following specific steps:
step one, discharging mixed gas containing water and coal cinder into a water cinder storage device through an inlet pipeline of the water cinder storage device, wherein the extraction negative pressure of the mixed gas is generally not lower than 13 KPa;
step two, the gas flow of the mixed gas is separated from gas, water and coal slag in a storage cavity of the grain slag storage through a gas-water-coal slag separator, and the specific gas-water-coal slag separation step comprises the following steps:
a: first gas, water and coal slag separation: when water and coal slag with the diameter of more than 1-2 mm in the mixed gas enter the cavity of the large-diameter storage from the small-diameter inlet pipeline, the primary gas, water and coal slag separation of the gas and the coal slag is realized due to the rapid reduction of the wind speed;
b: and (3) separating gas, water and coal slag for the second time: coal slag in the mixed gas falls into the bottom of the storage cavity under the blocking action of a filtering sieve plate of a gas-water-coal-slag separator;
the mixed gas continuously enters a separator cavity of the gas-water-coal-slag separator, water in the mixed gas is fully absorbed by a water absorbing material in the separator cavity, after the water absorbing material is saturated, water seeped from the water absorbing material is stored in a water storage tank, and residual coal slag enters a water drainage tank at the bottom of the water storage tank and is discharged from a water slag discharge hole, so that secondary gas-water-coal-slag separation is realized;
c: and (3) separating gas, water and coal slag for the third time: the water discharged from the water granulated slag discharge port of the gas-water-coal slag separator forms a water curtain; the water curtain intercepts coal slag and water particles which bypass the separator cavity and remain in the storage cavity, and water discharged from the water slag discharge port and the residual coal slag and water particles also fall into the bottom of the storage cavity; namely, the third gas, water and coal slag are separated;
opening a slag discharging pipe valve, and discharging the coal slag and water retained at the bottom of the grain slag storage through a slag discharging pipe;
and step four, discharging the treated gas from an outlet pipeline of the grain slag storage for reutilization.
Further, the method also comprises a drainage step after the second step:
the siphon U-shaped drain pipe is blocked by the plug at the initial stage of gas extraction, so that normal extraction of an extraction pipeline can be realized; the water granulated slag in the water granulated slag storage is gradually increased along with the increase of the extraction time; when the water in the grain slag storage sequentially exceeds the water inlet and the water outlet, the plug is pushed open due to the pressure difference of the water inlet and the water outlet; and meanwhile, due to the action of the pressure difference between the water inlet and the water outlet, the pressure difference balance of the extraction pipeline is realized, a water seal effect is formed, and the extraction pipeline can be normally extracted.
The invention has the beneficial effects that:
1. the grain slag of the invention has good sedimentation effect: the traditional gas extraction pipeline water drainer and the slag remover are directly connected with each other through a pipeline, coal particles with smaller particles are not ready to settle under the action of wind speed and are sucked into the extraction pipeline under the action of negative pressure, the diameter of the grain slag storage (3) is 3-5 times larger than that of the extraction pipeline, and the speed of gas, water and coal slag is obviously reduced when the gas, water and coal slag pass through the grain slag storage (3), so that the water and the coal slag in the gas are timely settled into the grain slag storage (3);
2. the invention realizes three times of automatic separation of gas coal slag: the first automatic separation of gas and coal slag is realized in the large-diameter grain slag storage due to the reduction of the wind speed; the blocking function of the gas, water and slag separator and the water absorption function of the water absorption saturated material realize the second automatic separation of the gas coal slag; the gas, water and slag separation water curtain intercepts and reduces dust (small particles) again, and the third automatic separation of gas, coal and slag is realized.
3. The invention realizes the automatic drainage function of the extraction pipe: the U-shaped automatic drainage device is adopted, the principle of pressure difference balance at two ends is utilized, the automatic drainage function is realized, the water sealing effect is achieved, and the extraction effect is ensured.
4. The invention has simple integral structure: the design is ingenious, the manufacturing cost is low, the gas extraction efficiency is greatly improved, and the gas extraction device can be popularized and used in similar coal seam gas extraction.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic left side view of the structure of FIG. 1 according to the present invention;
FIG. 3 is a schematic structural view of a gas, water and coal slag separator of the device of the present invention;
FIG. 4 is a schematic side view of the gas, water and slag separator of the apparatus of the present invention;
FIG. 5 is a schematic view of the bottom structure of the gas, water and slag separator of the apparatus of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The gas, water and slag separator is simple in structure and ingenious in design, in the gas extraction process, a mixture of gas, water and slag enters the slag reservoir from the extraction pipe, when the gas, water and slag pass through the slag reservoir with the diameter being several times that of the extraction pipeline, the wind speed is greatly reduced to realize most of the slag to be settled, then the gas, water and slag are further settled under the blocking and water absorption effects of the gas, water and slag separator, and finally fine slag is settled under the effect of the gas, water and slag separation water curtain, so that the automatic separation of the gas, water and slag is realized; after water and coal cinder are deposited and chromatographed for a period of time, the coal cinder is periodically discharged by a slag discharge valve, and meanwhile, water is automatically discharged through a U-shaped automatic drainage device by utilizing a siphon principle, so that the device realizes the functions of gas extraction, automatic separation of gas, water and cinder, automatic discharge of water, periodic discharge of coal cinder and the like, and further effectively solves the problems of extraction pipeline blockage, pipeline water accumulation, unstable negative pressure and the like, and in order to achieve the purpose, the invention adopts the specific embodiment that:
example 1, as shown in fig. 1 to 5, a gas, water and coal slag separating device for a coal mine gas extraction pipeline comprises
The water granulated slag storage device 3, the inlet pipeline 2 and the outlet pipeline 8 of the water granulated slag storage device 3, and a gas-water-coal slag separator 4 is arranged in a storage cavity 31 of the slag storage device 3; the mixed gas containing water and coal slag is discharged into the storage cavity 31 through the inlet pipeline 2, the gas, water and coal slag separator 4 is used for separating the gas, water and coal slag from the mixed gas, and the separated gas is discharged from the outlet pipeline 8; a slag discharging pipe 1 is arranged at the bottom of the cavity of the grain slag storage 3, and a slag discharging valve 6 is arranged on the slag discharging pipe 1 to discharge coal slag after separation treatment;
the automatic water draining device 7 is arranged at the bottom of the storage cavity 31 at one end of the outlet pipeline 8, and is used for draining the separated water;
the separator cavity 43 of the gas, water and coal slag separator 4 is arranged on the top surface of the storage cavity 31 in an extending mode, the distance between the inlet end of the separator cavity 43 and the inlet end of the storage cavity 31 is 300-500 mm, the length of the separator cavity 43 is 1/3-1/2 of the length of the storage cavity 31, and the center line of the separator cavity 43 is overlapped with the center lines of the inlet pipeline 2 and the outlet pipeline 8; ensuring that the mixed gas stream entering the reservoir chamber 31 passes through the gas, water and coal slag separator 4.
The gas, water and coal slag separator 4 comprises a water storage tank 42 and at least two filtering sieve plates 45,
at least two filtering sieve plates 45 are vertically arranged on the inner wall of the top surface of the cavity of the grain slag storage 3, the water storage tank 42 is arranged in the storage cavity 31 through at least two filtering sieve plates 45, and the top surface of the storage cavity 31 of the grain slag storage 3, the at least two filtering sieve plates 45 and the water storage tank 42 enclose a separator cavity 43 of the gas-water-coal slag separator 4;
the filtering sieve plate 45 is provided with sieve pores 41, and the coal slag in the mixed gas falls into the bottom of the grain slag storage 3 under the blocking action of the filtering sieve plate 45; the separator cavity 43 is filled with water absorbing materials, the water absorbing materials absorb water and residual coal cinder in the mixed gas which passes through the sieve holes 41 and enters the separator cavity 43, and water seeped after the water absorbing materials are saturated is stored in the water storage tank 42; the water absorbing material is mainly polyurethane material, such as water absorbing sponge.
The slag storage device also comprises at least one water drainage groove 46, wherein the water drainage groove 46 is arranged on the bottom surface of the water storage groove 42 and is communicated with the water storage groove 42, at least one water drainage slag discharge hole 44 is arranged on the bottom surface of the water drainage groove 46, and the water drainage slag discharge hole 44 discharges water and a small amount of coal slag in the water storage groove 42 into the storage cavity 31 of the slag storage device 3;
the arrangement direction of the drainage groove 46 is perpendicular to the extension direction of the separator cavity 43, the water curtain 5 is formed by the water discharged from the grain slag discharge hole 44, and the mixed gas bypassing the separator cavity 43 is separated by the water curtain 5 into gas, water and coal slag.
The diameter of the holes of the sieve pores 41 on the filtering sieve plate 45 is 1-2 mm, and the coal cinder larger than the diameter is directly settled to the bottom of the water cinder storage device 3 due to the blockage of the filtering sieve plate 45.
The drainage grooves 46 comprise at least three drainage grooves which are arranged at the bottom of the water storage groove 42 in parallel and uniformly distributed mode, and the cross section of each drainage groove 46 is a cube of 0.5-1 cm multiplied by 0.5-1 cm;
the hole pitch of the water granulated slag discharging holes 44 is 4-5 cm, and the diameter of a single hole of the water granulated slag discharging holes 44 is a circular hole with the diameter of 2-3 mm.
The automatic drainage device 7 is a siphon U-shaped drainage pipe, and the height difference H between a water inlet 72 and a water outlet 73 of the siphon U-shaped drainage pipe is more than or equal to P/rho H, wherein P is the maximum negative pressure in the extraction pipeline, rho is the density of water, and H is the height difference between the water inlet 72 and the water surface in the storage cavity 31; the water outlet 73 extends out of the storage cavity 31, and a plug 71 is further arranged at the end of the water outlet 73.
The section of the storage cavity 31 of the grain slag storage 3 is circular; the diameter of the circular section of the storage cavity 31 is 1.5-2.5 times of the diameter of the inlet pipeline 2 and the outlet pipeline 8.
The inlet pipeline 2 is used for communicating and installing the gas, water and coal slag separation device at the lowest part of the main extraction pipeline through a flange.
In embodiment 2, the invention further provides a gas, water and coal slag separation method of the gas, water and coal slag separation device for the coal mine gas extraction pipeline, which includes the following steps:
step one, discharging mixed gas containing water and coal cinder into a water cinder storage device 3 through an inlet pipeline 2 of the water cinder storage device 3, wherein the extraction negative pressure of the mixed gas is generally not lower than 13 KPa;
secondly, the gas flow of the mixed gas is separated into gas, water and coal slag in a storage cavity 31 of the grain slag storage 3 through a gas-water-coal slag separator 4, and the specific gas-water-coal slag separation step comprises the following steps:
a: first gas, water and coal slag separation: when water and coal slag with the diameter of more than 1-2 mm in the mixed gas enter the large-diameter storage cavity 31 from the small-diameter inlet pipeline 2, the first gas, water and coal slag separation of the gas and the coal slag is realized due to the sharp reduction of the wind speed;
b: and (3) separating gas, water and coal slag for the second time: the coal slag in the mixed gas falls into the bottom of the storage cavity 31 under the blocking action of a filtering sieve plate 45 of the gas, water and coal slag separator 4);
the mixed gas continuously enters the separator cavity 43 of the gas-water-coal-slag separator 4, water in the mixed gas is fully absorbed by the water absorbing material in the separator cavity 43, after the water absorbing material is saturated, water seeped from the water absorbing material is stored in the water storage tank 42, and residual coal slag enters the water drainage tank 46 at the bottom of the water storage tank 42 and is discharged from the water slag discharge hole 44, namely, secondary gas-water-coal-slag separation;
c: and (3) separating gas, water and coal slag for the third time: the water discharged from the grain slag discharge port 44 of the gas, water and coal slag separator 4 forms a water curtain 5; the water curtain 5 intercepts the coal slag and water particles which bypass the separator cavity 43 and remain in the storage cavity 31, and the water discharged from the water slag discharge port 44 and the residual coal slag and water particles also fall into the bottom of the storage cavity 31; namely, the third gas, water and coal slag are separated;
step three, draining: in the initial stage of gas extraction, the siphon U-shaped drain pipe is blocked by the plug 71, so that normal extraction of an extraction pipeline can be realized; along with the increase of the extraction time, the water granulated slag in the water granulated slag storage 3 is gradually increased; when the water in the grain slag storage 3 sequentially exceeds the water inlet 72 and the water outlet 73, the plug 71 is pushed open due to the pressure difference between the water inlet 72 and the water outlet 73; then, when the water in the grain slag storage 3 increases again, the water is automatically discharged from the water outlet 73, the automatic water discharging function is realized, meanwhile, due to the pressure difference effect of the water inlet 72 and the water outlet 73, the pressure difference balance of the extraction pipeline is realized, the water sealing effect is formed, and the extraction pipeline can be used for extracting and collecting the water normally.
Opening a slag discharge pipe valve 6, and discharging the coal slag and water remained at the bottom of the grain slag storage 3 from the slag discharge pipe 1;
and step five, discharging the treated gas from an outlet pipeline 8 of the grain slag storage 3 for reutilization.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A gas, water and coal slag separating device for a coal mine gas extraction pipeline is characterized by comprising
The slag separator comprises a water granulated slag storage (3), an inlet pipeline (2) and an outlet pipeline (8) of the water granulated slag storage (3), wherein a gas-water-coal slag separator (4) is arranged in a storage cavity (31) of the slag storage (3); mixed gas containing water and coal slag is discharged into the storage cavity (31) through the inlet pipeline (2), the gas, water and coal slag separator (4) performs gas, water and coal slag separation treatment on the mixed gas, and the separated gas is discharged through the outlet pipeline (8); a slag discharge pipe (1) is arranged at the bottom of the cavity of the grain slag storage (3), and a slag discharge valve (6) is arranged on the slag discharge pipe (1) and is used for discharging coal slag after separation treatment;
the automatic water draining device (7) is arranged at the bottom of the storage cavity (31) at one end of the outlet pipeline (8) and is used for draining the separated water;
a separator cavity (43) of the gas-water-coal slag separator (4) is arranged on the top surface of the storage cavity (31) in an extending mode, the distance between the inlet end of the separator cavity (43) and the inlet end of the storage cavity (31) is 300-500 mm, the length of the separator cavity (43) is 1/3-1/2 of the length of the storage cavity (31), and the center line of the separator cavity (43) is overlapped with the center lines of the inlet pipeline (2) and the outlet pipeline (8); ensures that the mixed gas flow entering the storage cavity (31) passes through the gas-water-coal slag separator (4).
2. The gas, water and coal slag separating device of the coal mine gas extraction pipeline according to claim 1, wherein the gas, water and coal slag separator (4) comprises a water storage tank (42) and at least two filtering sieve plates (45),
at least two filtering sieve plates (45) are vertically arranged on the inner wall of the top surface of the cavity of the water granulated slag storage (3), the water storage tank (42) is arranged in the storage cavity (31) through the at least two filtering sieve plates (45), and the top surface of the storage cavity (31) of the water granulated slag storage (3), the at least two filtering sieve plates (45) and the water storage tank (42) enclose a separator cavity (43) of the gas, water and coal slag separator (4);
the filtering sieve plate (45) is provided with sieve holes (41), and the coal slag in the mixed gas falls into the bottom of the water slag storage (3) under the blocking action of the filtering sieve plate (45); the separator cavity (43) is filled with water absorbing materials, the water absorbing materials absorb water and residual coal cinder in the mixed gas which passes through the sieve pores (41) and enters the separator cavity (43), and water seeped after the water absorbing materials are saturated is stored in the water storage tank (42);
the water storage tank is characterized by further comprising at least one water drainage groove (46), the water drainage groove (46) is arranged on the bottom surface of the water storage groove (42) and communicated with the water storage groove (42), at least one water granulated slag discharge hole (44) is formed in the bottom surface of the water drainage groove (46), and the water granulated slag discharge hole (44) discharges water and a small amount of coal slag in the water storage groove (42) into the storage cavity (31) of the granulated slag storage (3);
the arrangement direction of the drainage groove (46) is vertical to the extension direction of the separator cavity (43), water curtain (5) is formed by water discharged from the water slag discharge hole (44), and the water curtain (5) separates gas, water and coal slag from the mixed gas bypassing the separator cavity (43).
3. The gas, water and coal slag separating device for the coal mine gas extraction pipeline according to claim 3, wherein the diameter of the holes of the sieve pores (41) arranged on the filtering sieve plate (45) is 1-2 mm, and the coal slag with the diameter larger than the diameter is directly settled to the bottom of the water slag storage (3) due to the blockage of the filtering sieve plate (45).
4. The gas, water and coal slag separation device for the coal mine gas extraction pipeline according to claim 3, wherein the number of the drainage grooves (46) is at least three, the drainage grooves are arranged at the bottom of the water storage groove (42) in parallel and uniformly, and the cross section of each drainage groove (46) is a cube of 0.5-1 cm x 0.5-1 cm.
5. The gas, water and coal slag separation device for the coal mine gas extraction pipeline according to claim 3, wherein the hole pitch of the drainage hole (44) for the drainage slag is 4-5 cm, and the diameter of a single hole of the drainage hole (44) for the drainage slag is a circular hole with the diameter of 2-3 mm.
6. The gas, water and coal slag separation device for the coal mine gas extraction pipeline according to claim 1, wherein the automatic drainage device (7) is a siphon U-shaped drainage pipe, and the height difference H between a water inlet (72) and a water outlet (73) of the siphon U-shaped drainage pipe is more than or equal to P/rho H, wherein P is the maximum negative pressure in the extraction pipeline, rho is the density of water, and H is the height difference between the water inlet (72) and the water surface in the storage cavity (31); the water outlet (73) extends out of the storage cavity (31), and a plug (71) is further arranged at the end part of the water outlet (73).
7. The gas, water and coal slag separation device for the coal mine gas extraction pipeline according to claim 1, wherein the section of the storage cavity (31) of the water slag storage (3) is circular; the diameter of the circular section of the storage cavity (31) is 1.5-2.5 times of the diameter of the inlet pipeline (2) and the outlet pipeline (8).
8. The gas, water and coal slag separating device for the coal mine gas extraction pipeline according to any one of claims 1 to 7, wherein the gas, water and coal slag separating device is communicated and installed at the lowest position of an extraction main pipeline through a flange by the inlet pipeline (2).
9. The gas, water and coal slag separation method of the separation device according to claims 1-8, characterized by comprising the following steps:
discharging mixed gas containing water and coal cinder into a water cinder storage device (3) through an inlet pipeline (2) of the water cinder storage device (3), wherein the extraction negative pressure of the mixed gas is generally not lower than 13 KPa;
secondly, the gas flow of the mixed gas is separated from gas, water and coal slag in a storage cavity (31) of a grain slag storage (3) through a gas-water-coal slag separator (4), and the specific gas-water-coal slag separation step comprises the following steps:
a: first gas, water and coal slag separation: when water and coal slag with the diameter of more than 1-2 mm in the mixed gas enter the large-diameter storage cavity (31) from the small-diameter inlet pipeline (2), the primary gas, water and coal slag separation of the gas and the coal slag is realized due to the rapid reduction of the wind speed;
b: and (3) separating gas, water and coal slag for the second time: coal slag in the mixed gas falls into the bottom of the storage cavity (31) under the blocking action of a filtering sieve plate (45) of the gas-water-coal slag separator (4);
the mixed gas continuously enters a separator cavity (43) of the gas-water-coal-slag separator (4), water in the mixed gas is fully absorbed by a water absorption material in the separator cavity (43), water seeped from the water absorption material is stored in a water storage tank (42) after the water absorption material is saturated, and residual coal slag enters a water drainage tank (46) at the bottom of the water storage tank (42) and is discharged from a water slag discharge hole (44), namely, secondary gas-water-coal-slag separation is carried out;
c: and (3) separating gas, water and coal slag for the third time: the water discharged from the water granulated slag discharge port (44) of the gas, water and coal slag separator (4) forms a water curtain (5); the water curtain (5) intercepts the coal slag and water particles which bypass the separator cavity (43) and remain in the storage cavity (31), and the water and the residual coal slag and water particles discharged from the water slag discharge port (44) also fall into the bottom of the storage cavity (31); namely, the third gas, water and coal slag are separated;
step three, opening a slag discharge pipe valve (6), and discharging the coal slag and water remained at the bottom of the grain slag storage (3) through a slag discharge pipe (1);
and step four, discharging the treated gas from an outlet pipeline (8) of the granulated slag storage (3) for reutilization.
10. The gas, water and coal slag separating method of the separating device according to claim 9, characterized by further comprising a water draining step after the second step:
in the initial stage of gas extraction, a siphon U-shaped drain pipe is blocked by a plug (71), so that normal extraction of an extraction pipeline can be realized; along with the increase of the extraction time, the water granulated slag in the water granulated slag storage (3) is gradually increased; when water in the grain slag storage (3) sequentially exceeds the water inlet (72) and the water outlet (73), the plug (71) is pushed open under the action of the pressure difference of the water inlet (72) and the water outlet (73); and then, when the water in the grain slag storage (3) is increased again, the water is automatically discharged from the water outlet (73), so that the automatic water discharging function is realized, meanwhile, due to the pressure difference effect of the water inlet (72) and the water outlet (73), the pressure difference balance of the extraction pipeline is realized, the water sealing effect is formed, and the extraction pipeline can be normally extracted.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113775305A (en) * | 2021-09-30 | 2021-12-10 | 卢强 | Coal mine gas extraction drilling dust falling device and using method thereof |
| CN114000914A (en) * | 2021-12-07 | 2022-02-01 | 安阳鑫龙煤业（集团）红岭煤业有限责任公司 | Coal mine gas extraction device |
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- 2021-05-26 CN CN202110577879.6A patent/CN113217082A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113775305A (en) * | 2021-09-30 | 2021-12-10 | 卢强 | Coal mine gas extraction drilling dust falling device and using method thereof |
| CN114000914A (en) * | 2021-12-07 | 2022-02-01 | 安阳鑫龙煤业（集团）红岭煤业有限责任公司 | Coal mine gas extraction device |
| CN114000914B (en) * | 2021-12-07 | 2024-05-03 | 安阳鑫龙煤业（集团）红岭煤业有限责任公司 | Coal mine gas extraction device |
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