CN104453979A - Method for improving underground coal mine negative pressure suction dust removal technology - Google Patents

Method for improving underground coal mine negative pressure suction dust removal technology Download PDF

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Publication number
CN104453979A
CN104453979A CN201410632784.XA CN201410632784A CN104453979A CN 104453979 A CN104453979 A CN 104453979A CN 201410632784 A CN201410632784 A CN 201410632784A CN 104453979 A CN104453979 A CN 104453979A
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water
pressure
dust
air
core
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CN201410632784.XA
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CN104453979B (en
Inventor
王振平
安满林
任晓东
马砺
吴林峰
冯浩
王剑
薛永利
王建
陈业武
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Yanzhou Coal Mining Co Ltd
Yanzhou Coal Industry Co Ltd
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Yanzhou Coal Industry Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/20Drawing-off or depositing dust
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/02Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying

Abstract

The invention relates to a method for improving an underground coal mine negative pressure suction dust removal technology. According to the method, a horn opening, high-pressure water jet pumps and high-pressure gas jet pumps are additionally arranged in front of an air inlet of an axial flow fan, and a water film dust removal barrel is additionally arranged at an air outlet of the axial flow fan; water, dust and fog are fully mixed through the high-pressure water jet pumps, the high-pressure gas jet pumps and the axial flow fan, and then the water, dust and fog are separated out by the water film dust removal barrel. The method for improving the underground coal mine negative pressure suction dust removal technology has the advantages of being small in investment, fast to take effect, obvious in dust removal effect and suitable for coal mine driving face dust removal.

Description

The remodeling method of underground coal mine negative-pressure ward dust collecting process
Technical field
The present invention relates to a kind of remodeling method of underground coal mine negative-pressure ward dust collecting process.
Background technology
Mine dust is the subparticle of ore and the rock produced in mining production process.Coal dust is the one of mine dust, 45 ~ 2000g/m3 is reached when having volatile Dust Concentration, can blast when meeting 700 ~ 800 DEG C of high temperature burning things which may cause a fire disaster, and produce a large amount of toxic and harmfuls (as CO), even can also cause gas explosion and mine fire, mine dust also can make the worker of Long Term Contact mine dust suffer from pneumoconiosis in addition.
According to the relevant policies requirement of country to coal mine operation environment, the control of the just comprehensive conducting shaft dust of coal mining enterprise, to guarantee the safety in production of enterprise and to improve economy, society, environment, safety benefit.The treating flour dust technology of current employing comprises wind, water, close, clean and 5 aspects such as to protect, and based on wind, water.Wind is exactly dust removal by ventilation; Water is exactly wet operation; Close refer to airtight take out heavy; Only be that purification is distinguished and admirable; Protect is take individual protection measure.Wet operation comprises coal-bed flooding, external spraying in coal machine, spraying and transfer point spraying etc. between frame, and its mechanism of reducing dust by spray in conjunction with floating aerial dust particle, makes its gravity increase and Accelerated subsidence nothing more than water smoke.Its dust reduction rate can only reach about 60%, lower to the dust-laying effect of respirable dust, only reaches the dust reduction rate of 28%, and its reason is because coal, rock dust have hydrophobicity to a certain degree.Existing Wet-type dust-removal fan adopts electronic mode, and volume is large, noise is large, ancillary service is many, complex process, and Water jet stream dedusting ventilator etc. adopt that dedusting air quantity is little, weak effect, are necessary to transform.
Summary of the invention
The technical problem to be solved in the present invention is the above-mentioned defect how overcoming prior art, provides a kind of remodeling method of underground coal mine negative-pressure ward dust collecting process.
For solving the problems of the technologies described above, the remodeling method of this underground coal mine negative-pressure ward dust collecting process comprises the steps:
One). scrap build
1) horn mouth is installed additional at the air intake of axial flow blower, set up in horn mouth to put and be multiplely uniformly distributed high-pressure water jet pump and be multiplely uniformly distributed high-pressure gas jet pump, and high-pressure gas jet pump is between high-pressure water jet pump and axial flow blower, water film dedusting cylinder is installed additional at the air outlet of axial flow blower, described water film dedusting cylinder comprises urceolus and inner core, wherein inner core is by cage be wrapped in flexible knitmesh on cage and form, and urceolus downstream is connected with ring sealing plate, and urceolus bottom is provided with a blowdown pipeline;
2) high-pressure water pipe communicated at high-pressure water installs water valve additional, then high-pressure water pipe is introduced horn mouth, and high-pressure water pipe separates multiple arm, and each arm all communicates with the water spout of corresponding high-pressure water jet pump; The high-pressure air pipe communicated in high-pressure air source installs air valve additional, then high-pressure air pipe is introduced horn mouth, and high-pressure air pipe separates multiple arm, and each arm all communicates with the air nozzle of corresponding high pressure gas jet flow pump;
Two). technological transformation
3). open axial flow blower, water valve and air valve successively, the vacuum suction that part produces by high-pressure water jet pump containing dusty gas, enter horn mouth, meet with water under high pressure, water, dirt, gas tentatively mix, and form High water cut air-flow;
Above-mentioned High water cut air-flow produces vacuum suction by high pressure gas jet flow pump, and what suck with high pressure gas jet flow pump self meets containing dusty gas, and water, dirt, gas mix further, is formed containing water flow;
The above-mentioned water flow that contains produces vacuum suction by axial flow blower, and what suck with axial flow blower self meets containing dusty gas, and water, dirt, gas are thoroughly mixed to form fog stream, and fog stream major part dust is adsorbed by the little water droplet in fog stream, only has small part dust trip stream;
4) after axial flow blower, major part fog flows between the inside and outside cylinder of water film dedusting cylinder, the water droplet entered in the fog stream between inside and outside cylinder stops and forms moisture film in flexible knitmesh, the free dust of this part fog stream is retained down simultaneously, only hold clean air permeable moisture film, enter inner core
Fraction fog stream directly enters in inner core, and free dust and little water droplet roll, collide in inner core, and part free dust forms larger water droplet, drops on inner core moisture film after encountering little water droplet or little water Shang phase knock against each other; Part free dust and little water droplet are directly adsorbed by moisture film, and the sewage that moisture film adsorbs is more and more heavier, finally through inner core, discharge through blowdown pipeline,
Clean gas after the dedusting of two parts fog stream, finally discharges from inner core outlet.
Design like this, takes full advantage of the high-pressure air source of down-hole abundance, high-pressure water, and equipment is changed little, invests not high, and air circulation resistance increases little, but dust removing effects is obvious.
As optimization, be also provided with spiral deflector between the inside and outside cylinder of water film dedusting cylinder, spiral deflector and urceolus lower inner wall joint are provided with draining breach.Design like this, dust removing effects is better.
As optimization, in the inner core of water film dedusting cylinder, be also provided with spiral deflector.Design like this, dust removing effects is better, but air circulation resistance is amid a sharp increase.
The remodeling method of underground coal mine negative-pressure ward dust collecting process of the present invention has the following advantages: small investment, instant effect, the obvious advantage of dust removing effects, is applicable to working in driving face of coal mine dedusting.
1. principle is unique: the present invention can carry out stack combinations according to the dust removal requirement of different work point, because it has powerful air-flow expanded function, not only substantially increase the air quantity that process dust-laden is distinguished and admirable, also greatly reduce energy consumption, the energy consumption of processed in units air quantity is about 30% of like product, has saved cost.
2. efficiency of dust collection is high, applied widely: use the present invention to carry out dedusting dehydration, working resistance little (working resistance 800Pa), efficiency are high, when actual measurement dust concentration reaches 28000mg/m3, still normally can work and not block, the moist dust-contained airflow of High Rotation Speed around having special construction, the cup type de-dust hood of multiple dust removal mechanism repeatedly rotates and penetrates, thus reach the object of efficient de-dirt dehydration.The granularity of dust wide range that the cup type de-dust hood with unique texture can catch, has very high efficiency of seizing dust to coarse dust and respirable dust.
3. structure is simple: the present invention and combine and adopt development machine and support the use, and connected mode is simple, and water film dedusting cylinder has self-cleaning function, can long continuous operation, and clean and maintenance simple and fast, uses very convenient.
4. the present invention only increases pressure-air and water under high pressure does power on the basis of primitive axis flow fan, without the need to electricity consumption, noiselessness, movement-less part, pure frame for movement, plug and play, move light, overcome the shortcomings such as wet type electrical dust-removing blower fan volume is large, noise is large, ancillary service is many, heavy difficulty is mobile, also overcome the defects such as the mechanical type dedusting fan process air quantity such as such as Water jet stream dedusting ventilator existing are at present little, dust removing effects is poor simultaneously.
5. present invention process is simple, and system is reliable, and its dedusting fan volume is little, lightweight, moves and moves conveniently, plug and play, has no special requirements to the temperature humidity of environment and dust concentration.
6. the present invention is applicable to gun diging face dedusting, the dedusting of shotcrete setting, fully mechanized workface dedusting etc., is specially adapted to the mine dedusting that highly gassy mine, Gas Outburst mine and explosive index of coal dust are high.
Accompanying drawing explanation
Be described further below in conjunction with the remodeling method of accompanying drawing to this underground coal mine negative-pressure ward dust collecting process:
Fig. 1 is the scrap build schematic diagram of the embodiment of the remodeling method of this underground coal mine negative-pressure ward dust collecting process.
In figure: 1 be axial flow blower, 2 be horn mouth, 3 be high-pressure water jet pump, 4 be high-pressure gas jet pump, 5 be water film dedusting cylinder, 51 be urceolus, 52 be inner core, 53 be ring sealing plate, 6 be blowdown pipeline, 7 be high-pressure water pipe, 8 be water valve, 9 be high-pressure air pipe, 10 be air valve, 11 be spiral deflector, 12 be draining breach, 13 be water stop, 14 be high-pressure air feed station, 15 be air duct, 16 be booster, 17 be Mine Dust, 18 for development end.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, the remodeling method of underground coal mine negative-pressure ward dust collecting process, comprises the steps:
One). scrap build
1) horn mouth 2 is installed additional at the air intake of axial flow blower 1, set up in horn mouth 2 to put and be multiplely uniformly distributed high-pressure water jet pump 3 and be multiplely uniformly distributed high-pressure gas jet pump 4, and high-pressure gas jet pump 4 is between high-pressure water jet pump 3 and axial flow blower 1, water film dedusting cylinder 5 is installed additional at the air outlet of axial flow blower 1, described water film dedusting cylinder 5 comprises urceolus 51 and inner core 52, wherein inner core 52 is by cage be wrapped in flexible knitmesh on cage and form, urceolus 51 downstream is connected with ring sealing plate 53, and urceolus bottom is provided with a blowdown pipeline 6;
2) high-pressure water pipe 7 communicated at high-pressure water installs water valve 8 additional, and then high-pressure water pipe 7 is introduced horn mouth 2, high-pressure water pipe 7 separates multiple arm, and each arm all communicates with the water spout of corresponding high-pressure water jet pump 3; The high-pressure air pipe 9 that high-pressure air source communicates installs air valve 10 additional, and then high-pressure air pipe 9 is introduced horn mouth 2, high-pressure air pipe 9 separates multiple arm, and each arm all communicates with the air nozzle of corresponding high pressure gas jet flow pump 4;
Also be provided with spiral deflector 11 between the urceolus 51 of water film dedusting cylinder 5, inner core 52, spiral deflector 11 and urceolus 51 lower inner wall joint are provided with draining breach 12.
Note: also can set up spiral deflector in the inner core of water film dedusting cylinder if desired, figure slightly.
Two). technological transformation
3). open axial flow blower 1, water valve 8 and air valve 10 successively, the vacuum suction that part produces by high-pressure water jet pump 3 containing dusty gas, enter horn mouth 2, meet with water under high pressure, water, dirt, gas tentatively mix, and form High water cut air-flow;
The vacuum suction that above-mentioned High water cut air-flow produces by high pressure gas jet flow pump 4, what suck with high pressure gas jet flow pump 4 self meets containing dusty gas, and water, dirt, gas mix further, is formed containing water flow;
The above-mentioned water flow that contains produces vacuum suction by axial flow blower 1, and what suck with axial flow blower 1 self meets containing dusty gas, and water, dirt, gas are thoroughly mixed to form fog stream, and most of dust is adsorbed by the little water droplet in fog stream, only has small part dust to swim stream;
4) after axial flow blower 1, major part fog flows between the urceolus 51 of water film dedusting cylinder, inner core 52, the water droplet entered in fog stream therebetween stops and forms moisture film in flexible knitmesh, the free dust of this part fog stream is retained down simultaneously, only hold clean air permeable moisture film, enter inner core 52
Fraction fog stream directly enters in inner core 52, and free dust and little water droplet roll in inner core 52, collision, and part free dust forms larger water droplet, drops on inner core 52 moisture film after encountering little water droplet or little water Shang phase knock against each other; Part free dust and little water droplet are directly adsorbed by moisture film, and the sewage that moisture film adsorbs is more and more heavier, finally through inner core 52, discharge through blowdown pipeline 6,
Clean gas after the dedusting of two parts fog stream, finally discharges from inner core 52 exports.
The dust concentration of certain mine development ends reaches 1000 ~ 3000mg/m3, and explosive index of coal dust, between 36.28% ~ 46.85%, has very strong explosivity, and the production safety of mine in serious threat, and threat worker's is healthy.Adopt traditional dust suppression not reach desirable effect, down-hole, higher than state specified standards 10mg/m3, is commonly used axial flow blower and is used according to after remodeling method of the present invention transformation, and arrange four dust measuring points by its dust concentration, is 1. near dirt source respectively; 2. the distinguished and admirable import department of dedusting fan; 3. dedusting fan distinguished and admirable exit 3m 4. dedusting fan outlet 5-10m and distinguished and admirable mixing place.Utilize dust concentration direct-reading instrument to measure the dust concentration of four measuring points before and after dedusting fan unlatching respectively, calculate the efficiency of dust collection of dedusting fan, according to actual test result, the efficiency of dust collection of this technique reaches about 95%, and dust-laying effect is obvious.

Claims (3)

1. a remodeling method for underground coal mine negative-pressure ward dust collecting process, comprises the steps:
One). scrap build
1) horn mouth is installed additional at the air intake of axial flow blower, set up in horn mouth to put and be multiplely uniformly distributed high-pressure water jet pump and be multiplely uniformly distributed high-pressure gas jet pump, and high-pressure gas jet pump is between high-pressure water jet pump and axial flow blower, water film dedusting cylinder is installed additional at the air outlet of axial flow blower, described water film dedusting cylinder comprises urceolus and inner core, wherein inner core is by cage be wrapped in flexible knitmesh on cage and form, and urceolus downstream is connected with ring sealing plate, and urceolus bottom is provided with a blowdown pipeline;
2) high-pressure water pipe communicated at high-pressure water installs water valve additional, then high-pressure water pipe is introduced horn mouth, and high-pressure water pipe separates multiple arm, and each arm all communicates with the water spout of corresponding high-pressure water jet pump; The high-pressure air pipe communicated in high-pressure air source installs air valve additional, then high-pressure air pipe is introduced horn mouth, and high-pressure air pipe separates multiple arm, and each arm all communicates with the air nozzle of corresponding high pressure gas jet flow pump;
Two). technological transformation
3). open axial flow blower, water valve and air valve successively, the vacuum suction that part produces by high-pressure water jet pump containing dusty gas, enter horn mouth, meet with water under high pressure, water, dirt, gas tentatively mix, and form High water cut air-flow;
Above-mentioned High water cut air-flow produces vacuum suction by high pressure gas jet flow pump, and what suck with high pressure gas jet flow pump self meets containing dusty gas, and water, dirt, gas mix further, is formed containing water flow;
The above-mentioned water flow that contains produces vacuum suction by axial flow blower, and what suck with axial flow blower self meets containing dusty gas, and water, dirt, gas are thoroughly mixed to form fog stream, and fog stream major part dust is adsorbed by the little water droplet in fog stream, only has small part dust trip stream;
4) after axial flow blower, major part fog flows between the inside and outside cylinder of water film dedusting cylinder, the water droplet entered in the fog stream between inside and outside cylinder stops and forms moisture film in flexible knitmesh, the free dust of this part fog stream is retained down simultaneously, only hold clean air permeable moisture film, enter inner core
Fraction fog stream directly enters in inner core, and free dust and little water droplet roll, collide in inner core, and part free dust forms larger water droplet, drops on inner core moisture film after encountering little water droplet or little water Shang phase knock against each other; Part free dust and little water droplet are directly adsorbed by moisture film, and the sewage that moisture film adsorbs is more and more heavier, finally through inner core, discharge through blowdown pipeline,
Clean gas after the dedusting of two parts fog stream, finally discharges from inner core outlet.
2. the remodeling method of underground coal mine negative-pressure ward dust collecting process as claimed in claim 1, it is characterized in that: be also provided with spiral deflector between the inside and outside cylinder of water film dedusting cylinder, spiral deflector and urceolus lower inner wall joint are provided with draining breach.
3. the remodeling method of underground coal mine negative-pressure ward dust collecting process as claimed in claim 1, is characterized in that: be also provided with spiral deflector in the inner core of water film dedusting cylinder.
CN201410632784.XA 2014-11-11 2014-11-11 The remodeling method of underground coal mine negative pressure-pumping dust collecting process Active CN104453979B (en)

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Publication number Priority date Publication date Assignee Title
CN105317453A (en) * 2015-11-16 2016-02-10 中国矿业大学 Dust removal method for waste rock smashing in underground coal mine chamber
CN105709533A (en) * 2016-04-20 2016-06-29 枣庄矿业(集团)有限责任公司柴里煤矿 Coal-caving wind-hydraulic linked dedusting device
CN106560593A (en) * 2015-09-25 2017-04-12 陈业武 Mine-underground negative-pressure-superposed wind-water ejection flow dust-removing fan

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Publication number Priority date Publication date Assignee Title
CN106560593A (en) * 2015-09-25 2017-04-12 陈业武 Mine-underground negative-pressure-superposed wind-water ejection flow dust-removing fan
CN105317453A (en) * 2015-11-16 2016-02-10 中国矿业大学 Dust removal method for waste rock smashing in underground coal mine chamber
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CN105709533A (en) * 2016-04-20 2016-06-29 枣庄矿业(集团)有限责任公司柴里煤矿 Coal-caving wind-hydraulic linked dedusting device

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