CN106368672B - Coal dust capturing device and method suitable for coal bed gas well aerodynamic cave - Google Patents
Coal dust capturing device and method suitable for coal bed gas well aerodynamic cave Download PDFInfo
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- CN106368672B CN106368672B CN201610781753.XA CN201610781753A CN106368672B CN 106368672 B CN106368672 B CN 106368672B CN 201610781753 A CN201610781753 A CN 201610781753A CN 106368672 B CN106368672 B CN 106368672B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
Abstract
A kind of coal dust capturing device and method suitable for coal bed gas well aerodynamic cave, coal dust capturing device, including binary channels wellhead assembly, Venturi scrubber, expansion chamber and sedimentation basin, the binary channels wellhead assembly is set to well head to receive the gas sprayed out of wellbore, it is flowed so that gas is changed to horizontal direction by vertical direction flowing, the Venturi scrubber is set to after binary channels wellhead assembly and in communication, it is sufficiently mixed air water, wet coal dust, after the expansion chamber is set to Venturi scrubber, it is trapped coal water combination particle and the coal dust trapped is discharged in the form of suspension, after the sedimentation basin is set to expansion chamber, so that the suspended liquid precipitate of pulverized coal particle of expansion chamber discharge；The present invention traps the coal dust to disperse during aerodynamic cave by lower cost and measures to it as a result, solves environmental pollution caused by the technology of aerodynamic cave, sprays the problems such as coal dust can not measure.
Description
Technical field
The present invention relates to the technical fields of cbm development, more particularly to one kind to be directed to coal bed gas well aerodynamic cave mistake
The coal dust capturing device and method suitable for coal bed gas well aerodynamic cave of coal dust are sprayed in journey.
Background technique
Aerodynamic cave technology, method are to inject into well large quantity of air, are quickly built the pressure and open flow by multiple
Operation forms cave, realizes the purpose of well caving completion volume increase.During making cave, coal dust is inevitably caused to spray phenomenon.
The aerodynamic cave technique carried out at present is not taken or only takes simple dedusting means, in construction, on the one hand to well
Field environment causes greatly to destroy, and on the other hand can not measure to coal dust is dug out.In addition, coal bed gas well aerodynamic cave
Coal dust, which sprays, has outburst amount big, and the big feature of coal particle size, common cleaner cannot fully achieve dedusting purpose；And due to
The coal bed gas aerodynamic cave construction period is shorter, and due to the limitation of cost, it is poor to be not suitable for higher operating costs, mobility
Large-scale cleaner, such as large size ceramic cyclone dust collectors.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, researching and designing go out a kind of coal dust capturing device suitable for coal bed gas well aerodynamic cave and
Method, to overcome drawbacks described above.
Summary of the invention
The purpose of the present invention is to provide a kind of coal dust capturing device suitable for coal bed gas well aerodynamic cave and sides
Method, lower cost trap the coal dust to disperse during aerodynamic cave and measure to it, provide a set of be used for
The coal dust capturing device and method in aerodynamic cave solve environmental pollution caused by the technology of aerodynamic cave, spray coal
The problems such as powder can not measure.In addition, cost is relatively low by the present invention, and convenient for splitting, short distance transportation can be carried out after fractionation, is saved
Cbm development cost has certain economic and social benefit.
To solve the above problems, the invention discloses a kind of coal dusts suitable for coal bed gas well aerodynamic cave to trap dress
It sets, including binary channels wellhead assembly, Venturi scrubber, expansion chamber and sedimentation basin, it is characterised in that:
The binary channels wellhead assembly is set to well head to receive the gas sprayed out of wellbore, so as to sprayed in wellbore
Gas by vertical direction flowing is changed to horizontal direction flowing, the Venturi scrubber be set to after binary channels wellhead assembly and with
Connection using the flow at high speed for spraying gas, be sufficiently mixed air water by Venturi effect, moisten coal dust, it is described heavy
Drop room is set to after Venturi scrubber and in communication, trapping coal water combination particle, and is discharged and is caught in the form of suspension
The coal dust collected, after the sedimentation basin is set to expansion chamber, so that the suspended liquid precipitate of pulverized coal particle of expansion chamber discharge, convenient for drawing
The metering of coal amount.
Wherein: the binary channels wellhead assembly is made of three-limb tube, preventer, open flow pipeline, tee tube and hose,
The three-limb tube is installed on well head, and one, three of them interface is connected to preventer upwards, a connection well head downwards, and one
Horizontal direction is connected to open flow pipeline, and the top of the preventer connects another three-limb tube, another three-limb tube
Three interfaces in one downwards connection preventer, one connects up job platform, and a horizontal direction is connected to hose, institute
It states blooie pipe road and hydraulic sluice valve is installed, the outlet end of the open flow pipeline is connected with tee tube, and three of the tee tube
Two horizontal positioned, one of connection open flow pipelines in interface, another outlet as binary channels wellhead assembly, described three
One interface of siphunculus vertically upward, is connected with the outlet end of hose.
Wherein: the Venturi scrubber includes trunnion, diffuser and first jet, is equipped with interior expansion in the diffuser
Pipe, inlet tube of the trunnion as Venturi scrubber, the periphery of trunnion are equipped with multiple first jets, and the diffuser is circle
Cone or pyramid type, the lesser one end of bore are connected to the outlet of trunnion, and the biggish one end of bore is as Venturi scrubber
Outlet, to be connected to expansion chamber.
Wherein: the Venturi scrubber includes trunnion, diffuser and first jet, is equipped with interior expansion in the diffuser
Pipe, inlet tube of the trunnion as Venturi scrubber, the periphery of trunnion are equipped with multiple first jets, and the diffuser is circle
Cone or pyramid type, the lesser one end of bore are connected to the outlet of trunnion, and the biggish one end of bore is as Venturi scrubber
Outlet, to be connected to expansion chamber.
Wherein: the expansion chamber is made of cabinet, baffle, second nozzle and Air Filter, and one side bottom of cabinet is equipped with
An at least water outlet, the top of the cabinet can be equipped with multiple second nozzles, and multiple plate washers are equipped in the cabinet, the multiple
Plate washer is staggered to be obliquely installed from the bottom and top of cabinet to box back, and the front end of the cabinet is connected to going out for diffuser
Mouthful, rear end is semi-closed structure, and the shield of upper part setting one obliquely, lower part is equipped with the Air Filter of package outlet.
Wherein: the sedimentation basin includes a regular shape and the smooth pond of four walls.
A kind of coal dust capture method suitable for coal bed gas well aerodynamic cave is also disclosed, coal as described above is used
Dirt capturing device comprising following steps:
Step 1: preparation stage, completion are attached and install to equipment；
Step 2: blowout prevention coal dust traps the stage, and the coal dust gone out for open flow is trapped；
Step 3: High Pressure Drain deslagging coal dust traps the stage, and the coal dust generated for High Pressure Drain deslagging process is caught
Collection；
Step 4: cleaning and metering phase are cleared up and are measured to the coal dust of trapping.
Wherein: may include following sub-step in above-mentioned step 2: sub-step 1: opening water supply pump, be installed on trunnion and case
The nozzle of body starts to spray water；Sub-step 2: closing preventer, opens the valve of open flow pipeline, carries out open flow preparation；Sub-step 3:
Hydraulic sluice valve is opened in operation, starts open flow；Sub-step 4: it is atomized water mist sufficiently and is sufficiently mixed with dust-contained airflow；Sub-step 5:
It settles wet coal dust and forms suspension.
Wherein: may include following sub-step in above-mentioned step 3: sub-step 1: opening preventer, closes open flow pipeline
Hydraulic sluice valve makes gas enter trunnion via hose；Sub-step 2: it is atomized water mist sufficiently and is sufficiently mixed with dust-contained airflow；Son
Step 3: settling wet coal dust and form suspension.
Wherein: following sub-step: sub-step 1 can be divided into above-mentioned step 4: opening top cover of box, divulged information a period of time,
Sub-step 2: after measurement box house gas density is less than 0.8%, the coal dust of precipitating is cleared up and is measured；Sub-step 3: will
Coal dust in sedimentation basin is cleared up and is measured；Sub-step 4: coal dust amount in expansion chamber is added with coal dust amount in sedimentation basin, is as put
Spray coal output.
By above structure it is found that of the invention coal dust capturing device and side suitable for coal bed gas well aerodynamic cave
Method has the effect that
Structure is simple, and gas energy loss is smaller, is not easy to impact aerodynamic cave technique.Good dedusting effect.
The present invention has sample by experiment, and coal dust trapping works well.It is low in cost.Material of the present invention obtains more convenient and easy
It is engineering construction save the cost in production.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows of the invention suitable for the coal dust capturing device in coal bed gas well aerodynamic cave and the structure of method
Schematic diagram.
Fig. 2 shows top view of the invention.
Fig. 3 shows the structural schematic diagram of binary channels wellhead assembly in the present invention.
Fig. 4 shows the structural schematic diagram of Venturi scrubber in the present invention.
Fig. 5 shows the structural schematic diagram of expansion chamber and sedimentation basin of the present invention.
Fig. 6 shows the top view of Fig. 5.
Appended drawing reference:
101, binary channels wellhead assembly；102, Venturi scrubber 103, expansion chamber；104, sedimentation basin；1, threeway connects
Pipe；2, preventer；3, open flow pipeline；4, the first valve；5, hydraulic sluice valve；6, tee tube；7, the second valve；8, hose；9, larynx
Pipe；10, first jet；11, diffuser；12, interior expander；13, cabinet；14, baffle；15, second nozzle；16, water outlet；17,
Air Filter；18, pond.
Specific embodiment
Referring to Fig. 1 to Fig. 6, it is shown that coal dust capturing device suitable for coal bed gas well aerodynamic cave of the invention and
Method.
Referring to Fig. 1 and Fig. 2, the coal dust capturing device may include binary channels wellhead assembly 101, Venturi scrubber 102,
Expansion chamber 103 and sedimentation basin 104, the binary channels wellhead assembly 101 are set to well head to receive the gas sprayed out of wellbore,
It is flowed so that the gas sprayed in wellbore is changed to horizontal direction by vertical direction flowing, the Venturi scrubber 102 is set to
It is after binary channels wellhead assembly 101 and in communication, air water is made using the flow at high speed for spraying gas by Venturi effect
It is sufficiently mixed, moistens coal dust, the expansion chamber 103 is set to after Venturi scrubber 102 and in communication, trapping coal-water
In conjunction with particle, and the coal dust trapped is discharged in the form of suspension, after the sedimentation basin 104 is set to expansion chamber 103, so that
The suspended liquid precipitate of pulverized coal particle that expansion chamber 103 is discharged, convenient for drawing the metering of coal amount.
Wherein, referring to Fig. 3, the binary channels wellhead assembly can be by three-limb tube 1, preventer 2, open flow pipeline 3, three
Siphunculus 6 and hose 8 are constituted, and the three-limb tube 1 is installed on well head, and one, three of them interface is connected to preventer 2 upwards, and one
A downward connection well head, a horizontal direction are connected to open flow pipeline 3, and the top of the preventer 2 connects another and three leads to
Adapter tube, a connection preventer 2 downwards in three interfaces of another three-limb tube, one connects up job platform, and one
A horizontal direction is connected to hose 8, wherein the first valve 4 and hydraulic sluice valve 5 are sequentially installed on the open flow pipeline 3, it is described
The outlet end of open flow pipeline 3 is connected with tee tube 6, and two are horizontally arranged in three interfaces of the tee tube 6, one of to connect
Logical open flow pipeline 3, another outlet as binary channels wellhead assembly, can be connected to venturi directly or indirectly through pipeline and wash
Device 102 is washed, an interface of the tee tube 6 vertically upward, is connected with the outlet end of hose 8, can also be equipped on the hose 8
One second valve.The binary channels wellhead assembly changes well head spray by the effect of the binary channels of open flow pipeline 3 and hose 8 as a result,
High-speed flow flow direction out, and make the gas being discharged in open flow process and High Pressure Drain deslagging process by different pipeline streams
Out, to prevent the blocking of hydraulic sluice valve 5 in blooie pipe road 3.Its working principle is that: in open flow operation, preventer is closed, is opened
The valve and hydraulic sluice valve of open flow pipeline, force high-speed gas to flow in open flow pipeline, and the change direction of motion is horizontal direction；
In High Pressure Drain deslagging operation, coal slime blocking blooie pipe is easy to produce due to needing up and down drilling rod, and when because draining
The hydraulic sluice valve on road needs to close at this time the valve and hydraulic sluice valve of open flow pipeline, opens preventer, forces air-flow from hose
Outflow, the change direction of motion are horizontal direction.
Referring to fig. 4, the Venturi scrubber 102 includes trunnion 9, diffuser 11 and first jet 10, it is preferred that is
Reinforce using effect, interior expander 12 can be installed in the diffuser 11, the structure and shape of the interior expander 12 can with gradually
Expander 11 is identical, but size is smaller, to be sufficiently set in diffuser 11, the trunnion 9 as Venturi scrubber 102 into
Mouth pipe, entrance is connected to the tee tube 6, and the periphery of trunnion 9 is equipped with multiple first jets 10, it is preferred that described more
A first jet 10 can be set to trunnion 9 in array-like, to realize uniform thorough hydrojet, it is preferred that first spray
Mouth 10 can be conical nozzle, and the diffuser 11 is circular cone or pyramid type, and the lesser one end of bore is connected to going out for trunnion 9
Mouthful, outlet of the biggish one end of bore as Venturi scrubber 102, to be connected to expansion chamber 103.Its specific mounting means
Are as follows: trunnion is connected in the tee tube of open flow line end, trunnion needs to bear larger pressure, therefore should be made by hard material；Larynx
Pipe surface should install nozzle, to trunnion internal spray water or activated water；Trunnion end connects diffuser；Wherein, diffuser should
It grows as far as possible, most short no less than 1m, the inclination expansion angle of circular cone or pyramid type should not exceed 45 ° (relative to trunnion axis
The angle of line).Its working principle is that: water or activated water are sprayed into trunnion by nozzle, when open flow high-velocity fluid passes through trunnion,
Due to Venturi effect, dynamic pressure increases static pressure and reduces, and the coal dust that open flow goes out is sufficiently humidified so as to after being atomized water sufficiently, increases its quality
And adhesiveness；When fluid is by diffuser, dynamic pressure reduces static pressure and increases, and makes fluid down, convenient for being captured in expansion chamber.
Referring to figs. 5 and 6, the expansion chamber is made of cabinet 13, baffle 14, second nozzle 15 and Air Filter 17, wherein
The cabinet 13 can be rectangular cabinet, in can be laid with backing plate, preferably length is not less than 5m, and height is not less than 1.5m, institute
It states cabinet 13 high-strength material (such as steel plate) can be selected and be welded, all welds should ensure that firm welding, close, described
One side bottom of cabinet is equipped with an at least water outlet 16, and unlatching dormer window is arranged at top, wherein the top of the cabinet 13 can be equipped with more
A second nozzle 15, optionally, the second nozzle 15 can be spiral cone cell nozzle, referring to Fig. 6, the multiple second nozzle
15 can be set to the front top of cabinet 13, and being alternatively arranged in multiple groups, and every group of nozzle includes 3-5 spaced second sprays
Mouth 15, is equipped with multiple plate washers 14 in the cabinet 13, and the staggered bottom and top from cabinet 13 of the multiple plate washer 14 are to case
13 rear end of body is obliquely installed, and the front end of the cabinet 13 is connected to the outlet of diffuser 11, and rear end is semi-closed structure, upper part
One shield obliquely is set, and lower part is equipped with the Air Filter 17 of package outlet, wherein the baffle, liner need to be with being not easy to rub
Material on fire is made.Its specific mounting means are as follows: cabinet is connected with above-mentioned flaring pipe end, inside can be laid with liner；
Staggered baffle up and down is set in cabinet；Multiple groups nozzle is arranged in top of the box, is wrapped up at cabinet distal opening using Air Filter.Its
Main function is: trapping coal-water hybrid particles, and the suspension of the coal dust trapped is arranged to sedimentation basin.Its cardinal principle is:
It is spaced apart from each other by the way that multiple plate washers 14 are as shown in Figure 5, open flow air-flow forms whirlpool between baffle and baffle, in high-speed motion
Coal-water hybrid particles constantly impinged upon on baffle under the work of inertia, accumulate the outstanding of coal dust downwards under gravity
Turbid is finally flowed out by water outlet, imports sedimentation basin.
Wherein, the sedimentation basin 104 includes a regular shape and the smooth pond 18 of four walls, be conducive to the precipitating of coal dust with
Metering.
Wherein, trunnion of the invention, conical nozzle, diffuser, the production of cabinet sectional, using flanged joint.
Wherein, the trunnion can be welded by 167mm casing and is made, and lean in entrance 1m at it and three groups of conical nozzles are arranged,
The conical nozzle can be by 55m3/ h immersible pump and 10cm steel pipe constitute independent water path and supply water for it, and 3 ‰ can be added in the water
Activator, and stir evenly.
Wherein, the diffuser is welded using steel plate, and the length is 2m, angle of flare is 15 °, distinguished and admirable to disperse,
Diffuser exit solderable one is conical baffled.
Wherein, the cabinet is welded using steel plate, long 12m, width 4m, high 3m, and inside laying three-ply board is as pad
Plate enhances explosion-proof effect to buffer the shock dynamics of coal dust, sillar.Its it is unilateral it is settable unload plate bursting and multiple discharge outlet, be convenient for
It drains and plays the role of unloading in generation explosion time quick-fried.The wooden baffle 14 of the box house setting twice, wooden baffle 14 are high
2m, wide 4m, tilt angle can be 45 degree, the rear part angle bar firm supporting.
Spiral cone cell nozzle as second nozzle is 3/4P127-120S-316L nozzle, totally 8, is set to cabinet top
Portion, position are as shown in the figure.Those spiral cone cell nozzles form water route using 65L immersible pump and 10cm steel pipe, are spiral cone cell
Nozzle supplies water；3 ‰ activators are added in water source, and stir evenly.
The shield is welded in the tail portion of cabinet using steel plate, changes wind direction at its end, precipitates distinguished and admirable flow direction
Pond carries out secondary dust removing.
The pond length and width of the sedimentation basin is 3m, deep 2m, injected clear water, and activator is added in 3 ‰ ratios in water, with
Enhance dustfall efficiency.
The coal dust capture method realized by structure as described above, mainly comprises the steps that
Step 1: the preparation stage, main to complete that equipment is attached and is installed；
Step 2: blowout prevention coal dust traps the stage, and the coal dust gone out for open flow is trapped；
Step 3: High Pressure Drain deslagging coal dust traps the stage, and the coal dust generated for High Pressure Drain deslagging process is caught
Collection；
Step 4: cleaning and metering phase are cleared up and are measured to the coal dust of trapping.
It may include following sub-step in above-mentioned step 1: sub-step 1:, will be each by requirement making apparatus component of the invention
Interface is connected firmly；Sub-step 2: being laid with water route, connects spray head and water supply pump；Sub-step 3: sedimentation basin is excavated；Sub-step 4: quasi-
Standby water source, can with but activator be necessarily added in water and stir evenly.
It may include following sub-step in above-mentioned step 2: sub-step 1: opening water supply pump, be installed on the spray of trunnion and cabinet
Mouth starts to spray water；Sub-step 2: closing preventer, opens the valve of open flow pipeline, carries out open flow preparation；Sub-step 3: remote
Hydraulic sluice valve is opened in operation, starts open flow；Sub-step 4: being atomized water mist sufficiently and be sufficiently mixed with dust-contained airflow, specific side
Method is, after dust-contained airflow flows through trunnion, since its flow velocity is larger, and the water atomization that trunnion spray head is sprayed；Gas containing atomized water
Stream passes through diffuser, and water mist can be uniformly distributed, sufficiently be combined with coal dust；Sub-step 5: settling wet coal dust and is formed suspended
Liquid, specific practice are: after the coal dust sufficiently mixed with water mist enters expansion chamber, sectional area sudden enlargement, air velocity reduces,
In addition baffle forces air-flow to turn to, and the biggish water droplet of inertia is intercepted by baffle at this time, to play the effect of dedusting.Cabinet discharge
Tail gas change the direction of motion under the action of shield, after Air Filter, be discharged into atmosphere.
It may include following sub-step in above-mentioned step 3: sub-step 1: after the open flow stage, opening preventer, close
The hydraulic sluice valve of open flow pipeline, makes gas enter trunnion via hose；Sub-step 2: make water mist be sufficiently atomized and and dust-contained airflow
It being sufficiently mixed, specific method is, after dust-contained airflow flows through trunnion, since its flow velocity is larger, the water mist that trunnion spray head is sprayed
Change；Air-flow containing atomized water passes through diffuser, and water mist can be uniformly distributed, sufficiently be combined with coal dust；Sub-step 3: make wet
Coal dust settles and formed suspension, and specific practice is: after the coal dust sufficiently mixed with water mist enters expansion chamber, sectional area is unexpected
Expand, air velocity reduces, and baffle forces air-flow to turn in addition, and the biggish water droplet of inertia is intercepted by baffle at this time, to play
The effect of dedusting.The tail gas of cabinet discharge changes the direction of motion under the action of shield, after Air Filter, is discharged into atmosphere.
Following sub-step: sub-step 1 can be divided into above-mentioned step 4: after the completion of open flow and High Pressure Drain deslagging operation, being beaten
Top cover of box is opened, ventilation a period of time, sub-step 2: after measurement box house gas density is less than 0.8%, construction personnel can
It holds portable tile detector and enters cabinet, the coal dust of precipitating is cleared up and measured.Sub-step 3: the coal dust in sedimentation basin is clear
It manages and measures.Sub-step 4: coal dust amount in expansion chamber is added with coal dust amount in sedimentation basin, as open flow coal output.
The coal dust capturing device and method suitable for coal bed gas well aerodynamic cave of the invention has following excellent as a result,
Point:
1, structure is simple, and gas energy loss is smaller, is not easy to impact aerodynamic cave technique.
2, good dedusting effect.The present invention has sample by experiment, and coal dust trapping works well.
3, low in cost.Material acquisition of the present invention is more convenient, and is easy to make, and is engineering construction save the cost.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.
Claims (8)
1. a kind of coal dust capturing device suitable for coal bed gas well aerodynamic cave, including binary channels wellhead assembly, venturi
Washer, expansion chamber and sedimentation basin, it is characterised in that:
The binary channels wellhead assembly is set to well head to receive the gas sprayed out of wellbore, so that the gas sprayed in wellbore
Horizontal direction flowing is changed to by vertical direction flowing, the Venturi scrubber is set to after binary channels wellhead assembly and connects therewith
It is logical, it is sufficiently mixed air water using the flow at high speed for spraying gas by Venturi effect, moistens coal dust, the expansion chamber
It is set to after Venturi scrubber and in communication, trapping coal water combination particle, and is discharged and is trapped in the form of suspension
Coal dust, after the sedimentation basin is set to expansion chamber so that expansion chamber discharge the suspended liquid precipitate of pulverized coal particle, convenient for drawing coal amount
Metering；
The binary channels wellhead assembly is made of three-limb tube, preventer, open flow pipeline, tee tube and hose, the threeway
Connecting tube is installed on well head, and one, three of them interface is connected to preventer upwards, and one connects downwards well head, a horizontal direction
It is connected to open flow pipeline, the top of the preventer connects another three-limb tube, and three of another three-limb tube connect
One is connected to downwards preventer in mouthful, and one connects up job platform, and a horizontal direction is connected to hose, the blooie pipe
Road is equipped with hydraulic sluice valve, and the outlet end of the open flow pipeline is connected with tee tube, two in three interfaces of the tee tube
It is a horizontal positioned, one of connection open flow pipeline, another outlet as binary channels wellhead assembly, the one of the tee tube
A interface vertically upward, is connected with the outlet end of hose.
2. coal dust capturing device as described in claim 1, it is characterised in that: the Venturi scrubber includes trunnion, flaring
Pipe and first jet, are equipped with interior expander in the diffuser, inlet tube of the trunnion as Venturi scrubber, trunnion
Periphery is equipped with multiple first jets, and the diffuser is circular cone or pyramid type, and the lesser one end of bore is connected to going out for trunnion
Mouthful, outlet of the biggish one end of bore as Venturi scrubber, to be connected to expansion chamber.
3. coal dust capturing device as claimed in claim 2, it is characterised in that: the expansion chamber is by cabinet, baffle, second nozzle
And Air Filter is constituted, one side bottom of cabinet is equipped with an at least water outlet, and the top of the cabinet is equipped with multiple second nozzles,
Multiple plate washers are equipped in the cabinet, the staggered bottom and top from cabinet of the multiple plate washer are set to box back inclination
It sets, the front end of the cabinet is connected to the outlet of diffuser, and rear end is semi-closed structure, the screening of upper part setting one obliquely
Plate, lower part are equipped with the Air Filter of package outlet.
4. coal dust capturing device as claimed in claim 1 or 2, it is characterised in that: the sedimentation basin include a regular shape and
The smooth pond of four walls.
5. a kind of coal dust capture method suitable for coal bed gas well aerodynamic cave uses any institute in such as claim 1-4
The coal dust capturing device stated comprising following steps:
Step 1: preparation stage, completion are attached and install to equipment；
Step 2: blowout prevention coal dust traps the stage, and the coal dust gone out for open flow is trapped；
Step 3: High Pressure Drain deslagging coal dust traps the stage, and the coal dust generated for High Pressure Drain deslagging process is trapped；
Step 4: cleaning and metering phase are cleared up and are measured to the coal dust of trapping.
6. coal dust capture method as claimed in claim 5, it is characterised in that: include following sub-step in above-mentioned step 3: son
Step 1: opening preventer, close the hydraulic sluice valve of open flow pipeline, gas is made to enter trunnion via hose；Sub-step 2: make water mist
It is sufficiently atomized and is sufficiently mixed with dust-contained airflow；Sub-step 3: it settles wet coal dust and forms suspension.
7. a kind of coal dust capture method suitable for coal bed gas well aerodynamic cave, uses coal dust as claimed in claim 3
Capturing device comprising following steps:
Step 1: preparation stage, completion are attached and install to equipment；
Step 2: blowout prevention coal dust traps the stage, and the coal dust gone out for open flow is trapped,
Include following sub-step: sub-step 1 in step 2: opening water supply pump, the nozzle for being installed on trunnion and cabinet starts to spray water；
Sub-step 2: closing preventer, opens the valve of open flow pipeline, carries out open flow preparation；Sub-step 3: hydraulic sluice valve is opened in operation,
Start open flow；Sub-step 4: it is atomized water mist sufficiently and is sufficiently mixed with dust-contained airflow；Sub-step 5: settle wet coal dust
And form suspension；
Step 3: High Pressure Drain deslagging coal dust traps the stage, and the coal dust generated for High Pressure Drain deslagging process is trapped；
Step 4: cleaning and metering phase are cleared up and are measured to the coal dust of trapping.
8. a kind of coal dust capture method suitable for coal bed gas well aerodynamic cave, uses coal dust as claimed in claim 3
Capturing device comprising following steps:
Step 1: preparation stage, completion are attached and install to equipment；
Step 2: blowout prevention coal dust traps the stage, and the coal dust gone out for open flow is trapped；
Step 3: High Pressure Drain deslagging coal dust traps the stage, and the coal dust generated for High Pressure Drain deslagging process is trapped；
Step 4: cleaning and metering phase are cleared up and are measured to the coal dust of trapping, following sub-step is divided into above-mentioned step 4
Rapid: sub-step 1: opening top cover of box, divulges information a period of time, sub-step 2: after measurement box house gas density is less than 0.8%,
The coal dust of precipitating is cleared up and measured；Sub-step 3: the coal dust in sedimentation basin is cleared up and is measured；Sub-step 4: it will settle
Indoor coal dust amount is added with coal dust amount in sedimentation basin, as open flow coal output.
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| CN107083931A (en) * | 2017-06-27 | 2017-08-22 | 淮南矿业(集团)有限责任公司 | A kind of dust guard of ground extinction drilling |
| CN110985100B (en) * | 2019-12-18 | 2021-05-11 | 中煤科工集团西安研究院有限公司 | Coal dust collecting device and method suitable for coal mine underground inert gas coal digging and outburst elimination |
| CN115199231B (en) * | 2022-07-15 | 2023-10-27 | 中国矿业大学 | Device and method for preventing spray holes with slag discharge, dust removal and extraction integration |
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