CN111804102B - Distributed closed dry dust removal system for air return gallery and dust removal method thereof - Google Patents
Distributed closed dry dust removal system for air return gallery and dust removal method thereof Download PDFInfo
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- CN111804102B CN111804102B CN202010613277.7A CN202010613277A CN111804102B CN 111804102 B CN111804102 B CN 111804102B CN 202010613277 A CN202010613277 A CN 202010613277A CN 111804102 B CN111804102 B CN 111804102B
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- 239000000428 dust Substances 0.000 title claims abstract description 280
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005086 pumping Methods 0.000 claims abstract description 45
- 238000001914 filtration Methods 0.000 claims description 34
- 238000007599 discharging Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 210000003437 trachea Anatomy 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003245 coal Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 230000000241 respiratory effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000009288 screen filtration Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
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Abstract
A distributed closed dry dust removal system of a return airway and a dust removal method thereof are provided, two sets of the system are arranged in front of each other along the airflow direction of the return airway, and dust removers are arranged along the walls of lanes on two sides in a staggered manner; the forced fan is arranged on the front side of the dust remover box body, air holes are formed in the air bag I and the air bag II, and the intelligent air pumping and compressing device I and the intelligent air pumping and compressing device II are connected with the air holes through rigid pipes respectively; the air bag I is arranged on the side far away from the dust remover, a filter screen is arranged in the air bag I, the air bag I and the air bag II are used independently, the inflated air bag I is attached to the adjacent side of the air bag II, the opposite side of the air bag I and the opposite side of the air bag II are attached to the roadway wall, and the air bag I of the rear dry dust removal system is attached to the tail of the dust remover; the air pipe can move up and down and is arranged at one side of the filter screen, and the air pipe is provided with a high-pressure nozzle which is opposite to the filter screen; the invention has simple structure and convenient operation, can control dust in a closed and centralized way, can remove dust with high efficiency and low resistance in a grading way, does not use water in the dust removing process and has good dust removing effect.
Description
Technical Field
The invention relates to a dry type dust removal system, in particular to a return airway distributed closed dry type dust removal system and a dust removal method thereof, and belongs to the technical field of ventilation and dust removal of coal mine tunnels.
Background
A large amount of dust is generated in the coal cutting, coal falling and other processes of the coal mining machine, the dust enters the return airway from the coal face along with the airflow, the dust concentration of the return airway is large, in addition, the air volume of the return airway is large, and generally reaches 1500m3About/min, the air volume is far greater than that of a single dry type filtering dust collector, and dust is not easy to capture; in addition, the wind speed is great, makes the sedimentary dust raise again easily, and respiratory dust concentration is big in the raise dust, leads to return airway environment to worsen on the one hand, and visibility is low, influences the normal operating of equipment to there is coal dust explosion accident hidden danger, and on the other hand, respiratory dust concentration is big, makes the workman suffer from pneumoconiosis easily, threatens workman's life health.
For a long time, the coal mine mainly adopts a mode of spray dust settling and combination of spray and a screen to remove dust, and the following problems generally exist: the water consumption is high when the spray is used, and particularly in northwest areas of China, coal mines are seriously lack of water and cannot meet the normal water demand requirement; the requirement on water quality is high, and when impurities in water are more, a nozzle is easy to block; when the spraying is used for dust fall, the dust removal efficiency is low, and particularly, the dust removal effect is not obvious on respiratory dust. The mode that uses spraying and screen cloth to combine together removes dust, increases the resistance in tunnel on the one hand, and main ventilation blower can't satisfy the needs of mine ventilation, in order to guarantee the normal operating of mine, needs to increase main ventilation blower's energy consumption, reduces main ventilation blower's life, and on the other hand is unfavorable for normal passing through of pedestrian and vehicle etc..
The invention discloses a dry type filter dust removal system with a publication number of CN105525939A for a roadway driving working face in 2016, 4, 27, the system adopts a draw-out type ventilation filter dust removal method to remove dust, on one hand, the draw-out type ventilation effective dust collection is small, the negative pressure is low, and the dust removal effect is poor; on the other hand, the coal mine tunnel space is narrow, the volume of the dry dust collector is required to be as small as possible, and the extraction type ventilation filtering dust removal is easy to useIn the method, the resistance of the dust remover is large, and the filtering air volume is small, so that the dust removing efficiency is low; in addition, the maximum air volume of the current dry dust collector certified by coal safety is 600m3And/min, the air quantity of the return airway cannot be matched.
Disclosure of Invention
The invention aims to provide a distributed closed dry-type dust removal system for a return airway and a dust removal method thereof, which have the advantages of simple structure, convenient operation, capability of closed centralized dust control, high-efficiency and low-resistance dust removal in a grading manner, no water in the dust removal process, good dust removal effect and contribution to the normal traffic of pedestrians, vehicles and the like.
In order to achieve the purpose, the invention provides a return air gallery distributed closed dry-type dust removal system which comprises a return air gallery closing device, an intelligent efficient dust removal device and dust removers, wherein the dry-type dust removal system is provided with two sets of dust removers in tandem along the air flow direction of the return air gallery, and the dust removers are arranged in a staggered manner close to the walls of the two side galleries; the dust remover comprises a press-in type fan and a dust remover box body, wherein the press-in type fan is arranged on the front side of the dust remover box body, dust-containing gas enters the dust remover box body from an air inlet of the press-in type fan, the top of the dust remover box body is uncovered, and the whole top is an air outlet of the dust remover; the air return roadway sealing device comprises an air bag I, an air bag II, an intelligent air pumping and compressing device I and an intelligent air pumping and compressing device II, wherein air holes are formed in the air bag I and the air bag II, and the intelligent air pumping and compressing device I and the intelligent air pumping and compressing device II are respectively connected with the air holes through rigid pipes and used for pumping air and inflating the air bag I and the air bag II; the air bag I is arranged on the side far away from the dust remover and surrounds the filter screen, the periphery of the filter screen is connected with the side wall of the air bag I, the expansion and contraction states of the filter screen are controlled by the air bag I, and a passing door is arranged on the filter screen; the air bag II is arranged at the inlet of the press-in type fan to form a dust collection cover, the air bag I and the air bag II are used independently, the inflated air bag I is tightly attached to the adjacent side of the air bag II, the opposite side of the air bag I and the opposite side of the air bag II are tightly attached to the corresponding roadway wall, and the air bag I of the rear dry type dust removal system is tightly attached to the tail of the front dust remover;
the intelligent high-efficiency ash removal device comprises an air pipe, wherein the air pipe can move up and down and is arranged on an air bag I and is arranged on the rear side of a filter screen, a plurality of high-pressure nozzles are uniformly arranged on the air pipe, and the high-pressure nozzles face the filter screen.
The dust remover adopts a press-in type ventilation, filtration and dust removal method, a press-in type fan is connected with a dust remover box body through a flange, moving wheels are arranged at the bottoms of the press-in type fan and the dust remover box body, the moving wheels are screwed at the bottoms of the press-in type fan and the dust remover box body, the top of the dust remover box body is uncovered, an air outlet is arranged at the top of the dust remover box body, the filtration precision of the dust remover is 2 mu m, and access doors are arranged at two sides of the dust remover box body; the filtering system of the dust remover mainly comprises filter cylinders, wherein a plurality of filter cylinders are connected in series through a pattern plate and then are fixed in the dust remover box body; the dust cleaning system of the dust remover comprises an injection pipe, a nozzle and an air bag, wherein a fixed support is welded on a pattern plate, the injection pipe is fixed on the fixed support through a tightener, the air bag is connected with the injection pipe through an adapter, the air bag is connected with a pressure gauge, the air bag is connected with an air inlet pipe through a high-pressure air pipe for supplying air, and a pilot valve is connected with a pneumatic pulse valve through a hose and is arranged on the injection pipe; the ash discharging system of the dust remover adopts a hand-operated turntable to rotate a transmission shaft, drives a scraper to concentrate dust on a bottom plate of a box body of the dust remover to an ash discharging opening, and then opens an ash discharging drawer to discharge the dust.
The intelligent efficient ash removal device also comprises an upright post and an intelligent moving sliding block, wherein the intelligent moving sliding block is arranged on the upright post and drives the air pipe to move up and down along the upright post.
A dust removal method of a return airway distributed closed dry dust removal system comprises the following steps:
firstly, a dry type dust removal system adopts a distributed arrangement method, and two sets of dry type dust removal systems are arranged in front of each other along the air flow direction of an air return tunnel; firstly, a switch of a press-in type fan is turned on, dust collectors on the front side and the rear side are started, and dust-containing gas enters a dust collector box body through the press-in type fan on the front side; the intelligent air pumping and compressing device I and the intelligent air pumping and compressing device II on the front side and the rear side respectively inflate the air bag I and the air bag II, the air bag I and the air bag II are rapidly expanded, the filter screen is unfolded until the front side air bag I is tightly attached to the adjacent side of the air bag II, the opposite side of the air bag I and the air bag II is tightly attached to the corresponding roadway wall, and the air bag I of the rear side dry type dust removal system is tightly attached to the tail of the front side dust remover;
secondly, when pedestrians and other small objects pass through the door, the passing door is controlled to be opened in sequence, and after the pedestrians and other small objects pass through the door, the passing door is controlled to be closed; when a vehicle or other large objects pass through the intelligent air pumping device, the intelligent air pumping device of the air bag I on the side of the filter screen is controlled to sequentially pump air, the air bags I on the front side and the rear side simultaneously drive the filter screen to rapidly contract, when the vehicle or other large objects pass through the intelligent air pumping device, the intelligent air pumping device starts to sequentially pump air, the air bags I on the front side and the rear side rapidly expand, the filter screen is unfolded until the air bag I on the front side is tightly attached to the roadway wall, the air bag I on the rear side is tightly attached to the tail of the dust remover on the front side, and the rest parts are tightly attached to the roadway wall; when the dry-type dust removal system needs to be moved, the front and rear intelligent air pumping and compressing devices I and the intelligent air pumping and compressing device II start to pump air, the front and rear air bags I and the air bag II shrink rapidly, when the air bags shrink to the minimum, the intelligent air pumping and compressing devices I and the intelligent air pumping and compressing devices II stop pumping air, the switch of the press-in type fan is turned off, the dust remover is turned off, and the high-efficiency intelligent dust removal device is detached;
and thirdly, when the resistance of the filter screen rises to the maximum set resistance value, the high-efficiency intelligent ash removal device is started, the high-pressure nozzle starts to blow the filter screen, the dust collected by the filter screen drops towards the windward side, one part of large-particle dust is settled on the ground, the other part of suspended dust enters along with the wind flow under the negative pressure action of the press-in type fan, the dust remover and the dust collector are collected on the filter screen again, the air pipe moves up and down on one side of the filter screen, and after the high-pressure nozzle moves 0.5m for blowing for 0.4s, the dust remover is used for a period of time, and then the filter cartridge blows and collects the blown dust in.
Because the dust concentration of the dust-containing gas at the front side is large and the particle size distribution range is wide, after the dust-containing gas is treated by the dry dust removal system and the filter screen at the front side, the dust concentration of the dust-containing gas at the rear side is reduced, and the particle size distribution range is wide and small, so the filter precision of the filter screen at the front side is lower than that of the filter screen at the rear side.
The air volume processed by the dust remover and the filter screen is calculated according to the following formula:
Qgeneral assembly＝Q1+Q2＝Q1+Q3+Q4
Q1≤600m3/min
Q3≤600m3/min
Q2＝QGeneral assembly-Q1
Q4＝QGeneral assembly-Q1-Q3
In the formula:
Qgeneral assemblyThe total air volume of the return airway;
Q1the front side dust remover is used for processing air volume;
Q2the front side filter screen is used for treating air volume;
Q3the air quantity is processed by the rear-side dust remover;
Q4the air quantity is processed by the rear filter screen.
The initial resistance of the filter screen in the invention can be calculated according to the following formula:
P02＝k2Q2/s2
P04＝k4Q4/s4
in the formula:
P02is the initial resistance of the front side filter screen;
P04is the initial resistance of the rear filter screen;
s2the filtration area of the front side filter screen;
s4the filtration area of the rear side filter screen;
k2the resistance coefficient of the front side filter screen;
k4the resistance coefficient of the rear filter screen;
the maximum set resistance of the filter screen is x times of the initial resistance, and then the maximum set resistance can be calculated according to the following formula:
Pm2＝xk2Q2/s2
Pm4＝xk4Q4/s4
in the formula:
Pm2setting resistance for the maximum of the front side filter screen;
Pm4the maximum set resistance of the rear filter screen.
Compared with the prior art, the dry-type dust removal system adopts a distributed arrangement mode, two sets of dry-type dust removal systems are arranged in front of each other, and one set is arranged in a left-right staggered manner along the return airway, so that the dust-containing airflow in the airway is filtered in a graded manner, on one hand, the integral resistance of the device is reduced, the filtering efficiency is increased, on the other hand, the filtering airflow of the dust remover is reduced, the filtering resistance of the dust remover is slowly increased, and the blowing effect is good; the air bag is used for sealing the return airway, so that the centralized control of dust is realized, the air inlet is increased, the inlet air speed is reduced, and the use is safe; a filter screen is arranged in the air bag to realize primary trapping of large-particle dust; when large objects such as vehicles pass through, the air bag can be quickly contracted and expanded; a passing door is arranged on the filter screen, so that small objects such as pedestrians can pass through the passing door conveniently; the filter screen is sprayed through the nozzle, dust collected on the filter screen is removed, the resistance of the filter screen is reduced, the sprayed dust is filtered by the dust remover and collected on the filter screen again, water is not used in the process, the dust removing effect is good, and the working environment is optimized; the dry dust collector adopts a press-in type ventilation filtration dust collection method, the filtration range of the dust collector is enlarged, the volume is reduced, the resistance of the dust collector is reduced, and the filtration effect is good.
Drawings
FIG. 1 is a schematic view of a horizontal arrangement of the present invention;
FIG. 2 is a schematic view of FIG. 1 taken in the direction A;
FIG. 3 is a front view of the closed dry dedusting system for the return airway during vehicle passing;
FIG. 4 is a front view of the air return closed dry dedusting system of the present invention during movement;
FIG. 5 is a schematic view showing the internal structure of the dust collector case of the present invention;
FIG. 6 is a schematic view of the construction of the dust collector of the present invention;
FIG. 7 is a schematic flow chart of the operation of the intelligent control bladder of the present invention;
FIG. 8 is a flow chart of the total air flow purification of the return airway of the present invention.
In the figure: 1. the device comprises a dust remover, 2, an air pipe, 3, a stand column, 4, a high-pressure nozzle, 5, an intelligent moving sliding block, 6, an air flow direction, 7, an air return way, 8.1, air bags I and 8.2, air bags II and 9, a passing door, 10, an air hole, 11, a rigid pipe, 12.1, intelligent air pumping devices I and 12.2, intelligent air pumping devices II and 13, a filter screen, 14, a press-in type fan, 16, a moving wheel, 17, an air inlet, 18, a flange, 19, a pilot valve, 20, an ash discharging drawer, 21, an ash discharging port, 22, an access door, 23, a dust remover box body, 24, a pressure gauge, 25, an air inlet pipe, 26, a hand-operated rotary disc, 27, an air blowing pipe, 28, a fixed support, 29, a tightener, 30, a nozzle, 31, a pneumatic pulse valve, 32, an air bag, 33, a transmission shaft, 34, a filter cylinder, 35, a scraper blade, 36, a hose, 37, 38, a.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in figure 1, the distributed closed dry dust removal system for the return airway comprises a return airway closing device, an intelligent high-efficiency ash removal device and dust collectors 1, wherein the dry dust removal system is provided with two sets in front of and behind the air flow direction 6 of the return airway 7, the front dust collector 1 and the rear dust collector 1 are arranged close to roadway walls on two sides in a staggered mode, namely, an air bag I8.1 on the rear side is arranged behind the dust collector 1 on the front side; as shown in fig. 1, 2, 5, and 6, the dust collector 1 includes a press-in type fan 14 and a dust collector box 23, the press-in type fan 14 is installed at the front side of the dust collector box 23, and the dust-containing gas enters the dust collector box 23 from an air inlet 17 of the press-in type fan 14, the top of the dust collector box 23 is uncovered, the whole top is an air outlet 39 of the dust collector 1, a part of the dust-containing gas after ash removal by a front side air return passage sealing device enters the dust collector box 23 from an inlet of the press-in type fan 14, the dust collector box 23 further performs treatments such as filtration, blowing, ash discharge, etc., the purified air is discharged from the air outlet 39, and the dust particles in the other part of the dust-containing gas are collected on the rear side filter screen 13 again; the air return way sealing device comprises an air bag I8.1, an air bag II 8.2, an intelligent air pumping and compressing device I12.1 and an intelligent air pumping and compressing device II 12.2, wherein air holes 10 are formed in the air bag I8.1 and the air bag II 8.2, the intelligent air pumping and compressing device I12.1 and the intelligent air pumping and compressing device II 12.2 are respectively connected with the air holes 10 through rigid pipes 11 and used for pumping and inflating the air bag I8.1 and the air bag II 8.2; the air bag I8.1 is arranged on the side far away from the dust remover and surrounds the filter screen 13, the periphery of the filter screen 13 is connected with the side wall of the air bag I8.1, the expansion and contraction states of the filter screen 13 are controlled by the air bag I8.1, a passing door 9 through which pedestrians or small objects can pass is arranged at the corresponding position of the filter screen 13, the air bag II 8.2 is arranged at the inlet of the dust remover 1 to form a dust collection cover, the air bag I8.1 and the air bag II 8.2 are independently used, the inflated air bag I8.1 is tightly attached to the adjacent side of the air bag II 8.2, the opposite side of the air bag I8.1 and the opposite side of the air bag II 8.2 are tightly attached to the corresponding roadway wall, the rear air bag I8.1 is tightly attached to the tail of the front dust remover 1, and the rest of the air bag I8.1 are tightly attached to the roadway wall to form a.
The air pipe 2 of the intelligent high-efficiency dust cleaning device is arranged on one side of a filter screen 13 in a vertically movable mode, a plurality of high-pressure nozzles 4 are uniformly arranged on the air pipe 2, the high-pressure nozzles 4 face the filter screen 13, and in order to facilitate the vertical movement of the air pipe 2, the intelligent high-efficiency dust cleaning device further comprises an upright post 3 and an intelligent moving slide block 5, the intelligent moving slide block 5 is arranged on the upright post 3, and the intelligent moving slide block 5 drives the air pipe 2 to move vertically along the upright post 3.
As shown in fig. 5 and 6, the dust collector 1 adopts a press-in type ventilation filtration dust removal method, a press-in type fan 14 is connected with a dust collector box body 23 through a flange 18, moving wheels 16 are respectively installed at the bottoms of the press-in type fan 14 and the dust collector box body 23, the moving wheels 16 are screwed at the bottoms of the press-in type fan 14 and the dust collector box body 23, so that the dust collector 1 can move conveniently, the filtration precision of the dust collector 1 is 2 μm, and access doors 22 are arranged at two sides of the dust collector box body 23 for daily observation and maintenance; the filtering system of the dust remover 1 mainly comprises filter cartridges 34, wherein a plurality of filter cartridges 34 are fixed inside a dust remover box body 23 after being connected in series through a pattern plate 38; the dust cleaning system of the dust remover 1 comprises an injection pipe 27, a nozzle 30 and an air bag 32, wherein a fixed bracket 28 is welded on a pattern plate 38, the injection pipe 27 is fixed on the fixed bracket 28 through a fastener 29, the air bag 32 is connected with the injection pipe 27 through an adapter 37, the air bag 32 is connected with a pressure gauge 24, the air bag 32 is connected with an air inlet pipe 25 through a high-pressure air pipe for supplying air, and a pilot valve 19 is connected with a pneumatic pulse valve 31 through a hose 36 and is arranged on the injection pipe 27; the ash discharging system of the dust remover 1 adopts the hand-operated rotary disc 26 to rotate the transmission shaft 33, drives the scraper 35 to concentrate the dust on the bottom plate of the dust remover box body to the ash discharging port 21, and then opens the ash discharging drawer 20 to discharge the dust.
As shown in fig. 1 to 4 and 7, a dust removing method of a return airway distributed closed dry dust removing system includes the following steps:
firstly, a dry type dust removal system adopts a distributed arrangement method, and two sets of dry type dust removal systems are arranged in tandem along the airflow direction 6 of an air return way 7; firstly, a switch of the press-in type fan 14 is turned on, the dust remover 1 at the front side and the rear side is started, dust-containing gas enters the dust remover box body 23 through the press-in type fan 14 at the front side, and the dust remover box body 23 is used for filtering, blowing and discharging the dust-containing gas; meanwhile, the front and rear intelligent air pumping and compressing devices I12.1 and II 12.2 respectively inflate the air bag I8.1 and the air bag II 8.2, the air bag I8.1 and the air bag II 8.2 are rapidly expanded, the filter screen 13 is unfolded until the front air bag I8.1 is tightly attached to the adjacent side of the air bag II 8.2, the opposite side of the air bag I8.1 and the air bag II 8.2 is tightly attached to the corresponding roadway wall, the rear air bag I8.1 is tightly attached to the tail of the front dust remover 1, and the rest is tightly attached to the roadway wall to form a closed space, so that dust-containing gas enters through the filter screen 13; in the process, the dust-containing gas in the main air flow of the return airway is processed by the front-side dust remover 1 under the condition that the front-side press-in type fan 14 is in an open state, because the treatment precision of the dust remover 1 is higher, the gas treated by the front side dust remover 1 directly flows into the return airway, the large particle dust in the residual dust-containing gas which is not treated by the front side dust remover 1 is primarily filtered by the front side filter screen 13, namely, the front dust remover and the front filter screen are connected in parallel for filtering, the dust can be filtered simultaneously, the residual small-particle dust in the dust-containing gas after primary filtering, wherein one part of the dust-containing gas is filtered by the rear dust collector 1, the other part of the residual dust-containing gas is filtered by the rear filter screen 13, namely, the multi-stage series filtration and the parallel filtration are performed, as shown in the total airflow purification flow of the return airway in fig. 8.
Secondly, when pedestrians and other small objects pass through, the passing doors 9 are controlled to be opened in sequence, and after the pedestrians and other small objects pass through, the passing doors 9 are controlled to be closed; when a vehicle or other large objects pass, the intelligent air pumping and compressing device 12.1 of the air bag I8.1 at the side of the filter screen 13 is controlled to sequentially pump air, the air bags I8.1 at the front side and the rear side simultaneously drive the filter screen 13 to rapidly contract, when the vehicle or other large objects pass, the intelligent air pumping and compressing device 12.1 starts to sequentially inflate, the air bags I8.1 at the front side and the rear side are rapidly expanded, the filter screen 13 is unfolded until the air bag I8.1 at the front side tightly clings to the wall of a roadway, the air bag I8.1 at the rear side tightly clings to the tail of the dust remover 1 at the front side, and the rest parts are tightly clung to the wall of the roadway; when the dry type dust removal system needs to be moved, the front and rear intelligent air pumping and pressing device I12.1 and the intelligent air pumping and pressing device II 12.2 start to pump air, the front and rear air bags I8.1 and II 8.2 are quickly contracted to be minimum, the intelligent air pumping and pressing device I12.1 and II 12.2 stop pumping air, a switch of a press-in type fan 14 is turned off, the dust remover 1 is turned off, the high-efficiency intelligent dust removal device is detached and moved, when the dry type dust removal system is moved in a short distance, the dry type dust removal system can be moved by a moving wheel 16, and when the dry type dust removal system is moved in a long distance, the dry type dust removal system can be;
when filter screen 13 resistance rises to the biggest set resistance value, high-efficient intelligent ash removal device starts, and high pressure nozzle 4 begins to spray filter screen 13, and the dust of filter screen 13 entrapment drops to the windward side, and partly large granule dust subsides on ground, and another part suspension dust enters along with the wind current under the negative pressure of forced fan 14 dust remover 1 and recapture on filter screen 13 again, trachea 2 reciprocates in filter screen 13 one side, high pressure nozzle 4 is every to remove 0.5m jetting 0.4s, and dust remover 1 uses a period of time after, need right filter cartridge 34 sprays and concentrates the collection and sprays the dust that falls. The filtering accuracy of the front filter 13 is lower than that of the rear filter 13.
The air volume processed by the dust remover 1 and the filter screen 13 is calculated according to the following formula:
Qgeneral assembly＝Q1+Q2＝Q1+Q3+Q4
Q1≤600m3/min
Q3≤600m3/min
Q2＝QGeneral assembly-Q1
Q4＝QGeneral assembly-Q1-Q3
In the formula:
Qgeneral assemblyThe total air volume of the return airway;
Q1the front side dust remover is used for processing air volume;
Q2the front side filter screen is used for treating air volume;
Q3the air quantity is processed by the rear-side dust remover;
Q4the air quantity is processed by the rear filter screen.
The initial resistance of the filter 13 can be calculated as follows:
P02＝k2Q2/s2
P04＝k4Q4/s4
in the formula:
P02is the initial resistance of the front side filter screen;
P04is the initial resistance of the rear filter screen;
s2the filtration area of the front side filter screen;
s4the filtration area of the rear side filter screen;
k2the resistance coefficient of the front side filter screen;
k4the resistance coefficient of the rear filter screen;
the maximum set resistance of the filter screen 13 is x times of the initial resistance, and then the maximum set resistance can be calculated according to the following formula:
Pm2＝xk2Q2/s2
Pm4＝xk4Q4/s4
in the formula:
Pm2setting resistance for the maximum of the front side filter screen;
Pm4the maximum set resistance of the rear filter screen.
Examples
A return airway distributed closed dry dust removal system and a dust removal method thereof are disclosed, the specific embodiment is as follows:
total air quantity Q of return airway to be treatedGeneral assemblyIs 1500m3Min, front side dust collector processing air quantity Q1Select 600m3Min, rear dust collector processing air quantity Q3Select 500m3Min, then the following can be obtained:
front side filter screen processing air quantity Q2＝QGeneral assembly-Q1＝1500-600＝900m3/min
Air quantity Q processed by rear side filter screen4＝QGeneral assembly-Q1-Q3＝1500-600-500＝400m3/min
Selected front side screen drag coefficient k21Pa s/m, the resistance coefficient k of the rear filter screen selected42 Pa.s/m, front side filter screen filtration area s2Is 20m2Rear side filter screen filtration area s4Is 19m2Then, then
The initial resistance of the front side filter screen and the rear side filter screen are respectively as follows:
P02＝k2Q2/s2＝1×900/20＝45Pa
P04＝k4Q4/s4＝2×400/19＝42.1Pa
the maximum set resistance is 2 times of the initial resistance, and then the maximum set resistance is respectively:
Pm2＝xk2Q2/s2＝2×45＝90Pa
Pm4＝xk4Q4/s4＝2×42.1＝84.2Pa
when the maximum set resistance is reached, the high-efficiency intelligent ash removal device is started, and the high-pressure nozzle starts to blow the filter screen along the reverse airflow direction.
Claims (7)
1. A distributed closed dry-type dust removal system of a return airway comprises a return airway closing device, an intelligent high-efficiency dust removal device and a dust remover (1), and is characterized in that the dry-type dust removal system is provided with two sets in tandem along the airflow direction (6) of the return airway (7), and the dust remover (1) is arranged close to roadway walls on two sides in a staggered manner; the dust remover (1) comprises a press-in type fan (14) and a dust remover box body (23), the press-in type fan (14) is arranged on the front side of the dust remover box body (23), dust-containing gas enters the dust remover box body (23) from an air inlet (17) of the press-in type fan (14), the top of the dust remover box body (23) is uncovered, and the whole top is an air outlet (39) of the dust remover (1); the air return way sealing device comprises an air bag I (8.1), an air bag II (8.2), an intelligent air pumping device I (12.1) and an intelligent air pumping device II (12.2), wherein air holes (10) are formed in the air bag I (8.1) and the air bag II (8.2), the intelligent air pumping device I (12.1) and the intelligent air pumping device II (12.2) are respectively connected with the air holes (10) through rigid pipes (11) and used for pumping and inflating the air bag I (8.1) and the air bag II (8.2); the air bag I (8.1) is arranged on the side far away from the dust remover and surrounds the filter screen (13), the periphery of the filter screen (13) is connected with the side wall of the air bag I (8.1), the expansion and contraction states of the filter screen (13) are controlled by the air bag I (8.1), and the filter screen (13) is provided with a passing door (9); the air bag II (8.2) is arranged at an inlet of the press-in type fan (14) to form a dust collection cover, the air bag I (8.1) and the air bag II (8.2) are independently used, the inflated air bag I (8.1) is tightly attached to the adjacent side of the air bag II (8.2), the opposite sides of the air bag I (8.1) and the air bag II (8.2) are tightly attached to the corresponding roadway wall, and the air bag I (8.1) of the rear-side dry type dust removal system is tightly attached to the tail of the front-side dust remover (1);
high-efficient ash removal device of intelligence includes trachea (2), and trachea (2) can reciprocate set up on gasbag I (8.1) and set up in the rear side of filter screen (13), evenly arranges a plurality of high pressure nozzle (4) on trachea (2), and high pressure nozzle (4) face filter screen (13).
2. The return airway distributed closed dry dust removal system as claimed in claim 1, wherein the dust remover (1) adopts a press-in type ventilation filtration dust removal method, the press-in type fan (14) is connected with the dust remover box body (23) through a flange (18), the bottom of the press-in type fan (14) and the bottom of the dust remover box body (23) are both provided with a moving wheel (16), the moving wheel (16) is screwed on the bottom of the press-in type fan (14) and the bottom of the dust remover box body (23), the filtration precision of the dust remover (1) is 2 μm, and both sides of the dust remover box body (23) are provided with access doors (22); the filtering system of the dust remover (1) mainly comprises filter cartridges (34), wherein a plurality of filter cartridges (34) are fixed in the dust remover box body (23) after being connected in series through a pattern plate (38); the dust cleaning system of the dust remover (1) comprises an injection pipe (27), a nozzle (30) and an air bag (32), wherein a fixed support (28) is welded on a pattern plate (38), the injection pipe (27) is fixed on the fixed support (28) through a fastener (29), the air bag (32) is connected with the injection pipe (27) through an adapter (37), the air bag (32) is connected with a pressure gauge (24), the air bag (32) is connected with an air inlet pipe (25) through a high-pressure air pipe for air supply, and a pilot valve (19) is connected with a pneumatic pulse valve (31) through a hose (36) and is installed on the injection pipe (27); the ash discharging system of the dust remover (1) adopts a hand-operated rotary table (26) to rotate a transmission shaft (33), drives a scraper (35) to concentrate dust on a bottom plate of a box body of the dust remover to an ash discharging opening (21), and then opens an ash discharging drawer (20) to discharge the dust.
3. The air return roadway distributed closed dry dust removal system as claimed in claim 1 or 2, wherein the intelligent high-efficiency ash removal device further comprises an upright column (3) and an intelligent moving slide block (5), the intelligent moving slide block (5) is mounted on the upright column (3), and the intelligent moving slide block (5) drives the air pipe (2) to move up and down along the upright column (3).
4. The dust removal method for the return air roadway distributed closed dry dust removal system as claimed in claim 1, wherein the method comprises the following steps:
firstly, a dry type dust removal system adopts a distributed arrangement method, and two sets of dry type dust removal systems are arranged in tandem along the airflow direction (6) of an air return way (7); firstly, a switch of a press-in type fan (14) is turned on, the dust remover (1) on the front side and the rear side is started, and dust-containing gas enters a dust remover box body (23) through the press-in type fan (14) on the front side; the front and rear intelligent air pumping and compressing devices I (12.1) and II (12.2) respectively inflate the air bag I (8.1) and the air bag II (8.2), the air bag I (8.1) and the air bag II (8.2) expand rapidly, the filter screen (13) is unfolded until the front air bag I (8.1) is tightly attached to the adjacent side of the air bag II (8.2), the opposite sides of the air bag I (8.1) and the air bag II (8.2) are tightly attached to the corresponding roadway wall, and the air bag I (8.1) of the rear dry dust removal system is tightly attached to the tail of the front dust remover (1);
secondly, when pedestrians and other small objects pass through, the passing doors (9) are controlled to be opened in sequence, and after the pedestrians and other small objects pass through, the passing doors (9) are controlled to be closed; when a vehicle or other large objects pass through the intelligent air pumping and compressing device (12.1) of an air bag I (8.1) on the side of a filter screen (13) is controlled to sequentially pump air, the front air bag I and the rear air bag I simultaneously drive the filter screen (13) to rapidly contract, when the vehicle or other large objects pass through the intelligent air pumping and compressing device (12.1) starts to sequentially inflate, the front air bag I and the rear air bag I rapidly expand, the filter screen (13) is unfolded until the front air bag I is tightly attached to a roadway wall, the rear air bag I is tightly attached to the tail of the front dust remover (1), and the rest parts are tightly attached to the roadway wall; when the dry-type dust removal system needs to be moved, the intelligent air pumping and compressing device I and the intelligent air pumping and compressing device II start to pump air, the front side air bag I, the rear side air bag I, the front side air bag II and the rear side air bag II shrink rapidly, when the shrinkage is minimum, the intelligent air pumping and compressing device I and the intelligent air pumping and compressing device II stop pumping air, a switch of a press-in type fan (14) is turned off, the dust remover (1) is turned off, and the high-efficiency intelligent dust removal device is detached;
when resistance of the filter screen (13) rises to a maximum set resistance value, the high-efficiency intelligent ash removal device is started, the high-pressure nozzle (4) starts to blow the filter screen (13), dust collected by the filter screen (13) drops to the windward side, a part of large-particle dust is settled on the ground, the other part of suspended dust enters the dust remover (1) and is collected on the filter screen (13) again along with wind flow under the negative pressure action of the press-in type fan (14), the air pipe (2) moves up and down on one side of the filter screen (13), the high-pressure nozzle (4) blows 0.4s when moving 0.5m, and after the dust remover (1) is used for a period of time, the filter cartridge (34) is blown and the blown dust is collected in a concentrated mode.
5. The dust removing method of the return air duct distributed closed dry dust removing system according to claim 4, wherein the filtering precision of the front side filtering net is lower than that of the rear side filtering net.
6. The dust removing method of the return air lane distributed closed dry dust removing system according to claim 5, wherein the processing air volume of the dust remover (1) and the filter screen (13) is calculated according to the following formula:
Qgeneral assembly＝Q1+Q2＝Q1+Q3+Q4
Q1≤600m3/min
Q3≤600m3/min
Q2＝QGeneral assembly-Q1
Q4＝QGeneral assembly-Q1-Q3
In the formula:
Qgeneral assemblyThe total air volume of the return airway;
Q1the front side dust remover is used for processing air volume;
Q2the front side filter screen is used for treating air volume;
Q3the air quantity is processed by the rear-side dust remover;
Q4the air quantity is processed by the rear filter screen.
7. The dust removing method of the return air duct distributed closed dry dust removing system according to claim 5, wherein the initial resistance of the filter screen (13) is calculated according to the following formula:
P02＝k2Q2/s2
P04＝k4Q4/s4
in the formula:
P02is the initial resistance of the front side filter screen;
P04is the initial resistance of the rear filter screen;
s2the filtration area of the front side filter screen;
s4the filtration area of the rear side filter screen;
k2the resistance coefficient of the front side filter screen;
k4the resistance coefficient of the rear filter screen;
the maximum set resistance of the filter screen (13) is x times of the initial resistance, and then the maximum set resistance can be calculated according to the following formula:
Pm2＝xk2Q2/s2
Pm4＝xk4Q4/s4
in the formula:
Pm2setting resistance for the maximum of the front side filter screen;
Pm4the maximum set resistance of the rear filter screen.
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| GB479857A (en) * | 1936-08-12 | 1938-02-14 | Frederick Slingsby Wort Dobbs | Improvements in and relating to method of, and apparatus for, collecting and separating dust from dust-laden air |
| GB666291A (en) * | 1949-03-12 | 1952-02-06 | Houilleres Bassin Du Nord | Improvements in or relating to methods of flocculating particles in suspension in a gaseous medium |
| CN102061930B (en) * | 2010-12-09 | 2012-07-25 | 北京科技大学 | Downhole fast sealing device in coal mine |
| US9233332B2 (en) * | 2014-06-02 | 2016-01-12 | Caterpillar Inc. | Air filter assembly filling plenum interior space |
| CN205840493U (en) * | 2016-06-03 | 2016-12-28 | 王浩 | A kind of outdoor purification air airbouse |
| CN109469504A (en) * | 2018-11-29 | 2019-03-15 | 安徽省皖北煤电集团有限责任公司 | A kind of coal mine underground dust removal device |
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