CN111924582B - Dust removing system for transfer point of belt conveyor - Google Patents
Dust removing system for transfer point of belt conveyor Download PDFInfo
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- CN111924582B CN111924582B CN202010948586.XA CN202010948586A CN111924582B CN 111924582 B CN111924582 B CN 111924582B CN 202010948586 A CN202010948586 A CN 202010948586A CN 111924582 B CN111924582 B CN 111924582B
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- belt conveyor
- dust collection
- guide chute
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- 239000000428 dust Substances 0.000 title claims abstract description 275
- 238000012546 transfer Methods 0.000 title claims abstract description 41
- 230000001629 suppression Effects 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000012717 electrostatic precipitator Substances 0.000 claims description 72
- 239000000463 material Substances 0.000 claims description 53
- 239000002245 particle Substances 0.000 claims description 36
- 230000009471 action Effects 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000005686 electrostatic field Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005367 electrostatic precipitation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/181—Preventing escape of dust by means of sealed systems
- B65G69/182—Preventing escape of dust by means of sealed systems with aspiration means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
- Electrostatic Separation (AREA)
Abstract
The application relates to a dust removal system for a transfer point of a belt conveyor, and belongs to the technical field of belt conveyors. The application provides a dust removing system for a transfer point of a belt conveyor, which comprises an unpowered dust removing device, wherein the unpowered dust removing device comprises a guide chute, a tail box, skirt edge sealing rubber and a dust suppression curtain component; the electrostatic dust collection device is arranged at the position, close to the outlet, of the guide groove and comprises a plurality of electrostatic dust collection units, the electrostatic dust collection units are vertically arranged in parallel, an air passage is connected between the electrostatic dust collection device and the guide cavity, the bottom of the air passage is communicated with the guide cavity, the upper part of the air passage is communicated with air inlets at the bottoms of the electrostatic dust collection units, and an open air outlet is formed in the top of the electrostatic dust collection units; the control device is used for controlling the electrostatic dust collection device to alternately and intermittently carry out electrostatic adsorption. The dust removal system for the transfer point of the belt conveyor can realize safe, reliable and efficient dust removal at the transfer point.
Description
Technical Field
The application relates to the technical field of belt conveyors, in particular to a dust removal system for a transfer point of a belt conveyor.
Background
The material at the transfer point of the belt conveyor is introduced onto the conveyor belt of the conveyor through the chute under the action of gravity. Induced wind is generated during the falling process of the chute due to the materials. Meanwhile, a large amount of dust can be generated due to impact in the process that the materials fall onto the conveying belt from the chute, and the dust can form a large amount of dust emission near the transfer point under the action of induced wind. These dust emissions cause serious dust pollution to the production plant and the surrounding environment. Meanwhile, dust causes damage to running equipment and harm to the bodies of on-site workers.
At present, a common method for relieving dust emission phenomenon at a transfer point of a belt conveyor comprises the steps of spraying dust removal in an elongated guide chute, adding a wind guide pipe cloth bag dust remover at a dust emission part, and the like. However, the lengthening guide chute mode can not reduce the wind speed in the guide chute to zero speed, and dust overflows necessarily at the outlet of the guide chute, so that the dust raising problem at the outlet of the guide chute is difficult to eradicate. The dust removal mode of adding water in the guide chute for spraying dust removal needs a large amount of water, and the water spray nozzle has high requirements on water quality, and the later operation and maintenance costs are very high and the difficulty is large. The dust removal mode of installing the air guide pipe at the dust raising part of the transfer point of the belt conveyor requires a pipeline to convey the airflow with dust, and the pipeline is blocked after long-term use; furthermore, because the air flow needs to flow through the pipeline and the cloth bag of the dust chamber, the energy consumption is high, dust deposit in the cloth bag needs to be manually cleaned periodically, and the cloth bag is used as a dust filtering device, the danger is easy to occur when fire coal is passed, and the dust deposit box is a closed space and has potential safety hazard.
Disclosure of Invention
Therefore, the application provides the dust removing system for the transfer point of the belt conveyor, which combines the unpowered dust removing device with the electrostatic dust removing device, can remove dust efficiently and has good reliability.
The embodiment of the application provides a dust removal system for a transfer point of a belt conveyor, which comprises the following components: the unpowered dust removing device comprises a guide chute, a tail box, skirt edge sealing rubber and a dust suppression curtain component; the guide chute is used for covering the upper surface of the belt conveyor and forms a guide cavity with two ends open together with the upper surface of the belt conveyor, a first flaring is arranged on the top wall of the guide chute, which is close to the inlet, and the first flaring corresponds to a blanking point of the belt conveyor; the guide chute seals a gap between the guide chute and the belt through the tail box and the skirt edge sealing rubber, and the dust suppression curtain component decelerates induced wind generated by a blanking point of the belt conveyor; the electrostatic dust collection device is arranged at the position, close to the outlet, of the guide groove and comprises a plurality of electrostatic dust collection units which are vertically arranged in parallel, an air passage is connected between the electrostatic dust collection device and the guide cavity, the bottom of the air passage is communicated with the guide cavity, the upper part of the air passage is communicated with air inlets at the bottoms of the electrostatic dust collection units, and an open air outlet is formed in the top of the electrostatic dust collection unit; and the control device is used for controlling the electrostatic dust collection device to alternately and intermittently carry out electrostatic absorption so as to enable dust particles absorbed by the electrostatic dust collection unit to fall back to the upper surface of the belt conveyor.
Compared with the existing belt conveyor dust removing device, the belt conveyor transfer point dust removing system can realize safe, reliable and efficient dust removal at the transfer point, and the dust is seriously raised when materials fall onto the belt conveyor from the blanking point and are output from the outlet of the guide chute, so that the dust is basically free.
In addition, the belt conveyor transfer point dust removal system according to the embodiment of the application has the following additional technical characteristics:
According to some embodiments of the application, the electrostatic precipitator unit comprises an induced draft fan and an electrostatic dust collection assembly, wherein the induced draft fan and the electrostatic dust collection assembly are arranged in an up-down communication manner, and the induced draft fan can guide an air flow formed from bottom to top so that the air flow passes through the electrostatic dust collection assembly. In the electrostatic precipitator unit of this type, the induced draft fan is disposed at the upper side of the electrostatic dust collection assembly, so that dust particles can be allowed to freely fall back down the belt when the electrostatic dust collection assembly is intermittently operated.
According to some embodiments of the present application, the control device is in signal connection with electrostatic dust collection components of the plurality of electrostatic precipitator units, and the control device is used for controlling the electrostatic dust collection components of the plurality of electrostatic precipitator units to alternately and intermittently perform power-off operation; when the electrostatic dust collection assembly is electrified, dust particles are adsorbed in the electrostatic dust collection assembly through the action of an electrostatic field; when the electrostatic dust collection assembly is powered off, the electrostatic dust collection assembly directly discharges the adsorbed dust particles to the upper surface of the belt conveyor through rapping. By the action of adsorption, release and re-adsorption and the cooperation of vibration, the dust particles are sucked up and then discharged on the belt, and a device for collecting the adsorbed dust particles is omitted.
According to some embodiments of the application, a top wall of the guide chute near the outlet is provided with a plurality of second flares, the second flares are in one-to-one correspondence with bottom air inlets of the electrostatic precipitator units, each second flares is arranged below the corresponding bottom air inlet of the electrostatic precipitator unit, and the bottom of the air passage further comprises an air passage air inlet; the air inlet of the air passage is communicated with the material guide cavity, and the air passage is used for allowing air to flow upwards into the electrostatic dust collection device; the second flaring is communicated with the material guiding cavity, the second flaring is used for allowing air flow to enter the electrostatic dust collection device upwards, and dust particles are discharged to the upper surface of the belt conveyor from the bottom air inlet through the corresponding second flaring when the electrostatic dust collection assembly is powered off. Through arranging the second flaring and the bottom air inlet which correspond up and down and the air inlet of the air passage, the air flow can be guided into the electrostatic dust collector through the air passage, and the discharged dust particles can be collected.
According to some embodiments of the application, the aperture of the second flare is larger than the aperture of the air inlet of the electrostatic precipitator unit to facilitate sufficient collection of dust particles.
According to some embodiments of the application, the bottom air inlet and air outlet of the electrostatic precipitator unit are open at two ends and have no closed space in the middle. By means of the mode, dust storm can be avoided, and air flow can be smoothly discharged from the air outlet at the top.
According to some embodiments of the application, the plurality of electrostatic precipitator units are arranged next to each other in sequence along the length direction of the guide chute, and the distance value between the electrostatic precipitator units located near the outlet of the guide chute and the outlet of the guide chute is less than or equal to 2m. Through the arrangement form, the plurality of air guide openings are compactly arranged, so that a stronger air suction effect can be formed in the negative pressure area; negative pressure can be formed at the outlet of the guide chute effectively, and dust is prevented from diffusing out of the guide chute along with the output of materials.
According to some embodiments of the application, the dust suppressing curtain assembly comprises a plurality of dust suppressing half curtains which are arranged in the guide chute at intervals along the length direction of the guide chute and are arranged at a section from the blanking point to the electrostatic dust collection device, and the guide chute and the plurality of dust suppressing half curtains form an S-shaped channel along the length direction of the guide chute. Through the arrangement form, the airflow velocity in the guide chute can be reduced, so that dust in the airflow is settled. Under the action of the electrostatic dust collection device, the air flow passes through the S channel of the first dust suppression curtain assembly and forms a negative pressure area.
According to some embodiments of the application, the dust suppressing half curtain comprises: dust suppression semi-curtain body; the rotating shaft is connected with the upper side of the dust suppression semi-curtain body and is used for being rotatably installed on the top wall of the guide chute. The arrangement form is easy to assemble and long in service life.
According to some embodiments of the application, the dust suppressing half curtain body is a rubber soft curtain. The surface of the rubber soft curtain has elasticity, can absorb impulse when dust particles flow, and promotes sedimentation of the dust particles.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first view angle of a dust removal system at a transfer point of a belt conveyor according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a second view angle of a dust removal system at a transfer point of a belt conveyor according to an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic layout view of a first dust suppression curtain assembly in a belt conveyor transfer point dust removal system according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a dust suppression half curtain in a dust removal system at a transfer point of a belt conveyor according to an embodiment of the present application;
Fig. 6 is a schematic structural diagram of an electrostatic precipitator unit in a belt conveyor transfer point dust removal system according to an embodiment of the present application.
Icon: 100-a dust removal system of a transfer point of the belt conveyor; 110-belt conveyor; 111-a first end; 112-a second end; 113-a belt; 1131-belt upper surface; 115-a frame; 116-blanking points; 117-blanking end; 120-unpowered dust removal device; 121-a guide chute; 1211-a chute inlet; 1212-a chute outlet; 1213-first flaring; 1214-negative pressure zone; 1215-a second flare; 122-tail box; 124-dust suppression curtain assembly; 1241-dust suppression half curtain; 1242-dust suppression half curtain body; 1243-spindle; 126-a guide cavity; 128-skirt seal rubber; 130-an electrostatic dust collection device; 131-mounting a frame; 132-an electrostatic precipitator unit; 1321-induced draft fan; 1322-electrostatic precipitator component; 1323-an air inlet; 1324-air outlet; 1325-rubber hose; 134-an operating platform; 140-a wind passage; 141-the bottom of the wind passage; 142-upper part of the wind passage; 143-an air inlet of the air passing channel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Referring to fig. 1 and 2, a belt conveyor transfer point dust removal system 100 according to an embodiment of the application includes a belt conveyor 110, an unpowered dust removal device 120, an electrostatic dust removal device 130, and a control device.
The belt conveyor 110 travels in a first direction, with the belt conveyor 110 having a blanking point 116 and a blanking end 117 at each end.
The unpowered dust removing device 120 includes a guide chute 121, a tail box 122, a skirt seal rubber 128, and a dust suppressing curtain assembly 124 (see fig. 4). The guide chute 121 extends from the blanking point 116 to the blanking end 117 along the first direction, the guide chute 121 is arranged on the upper surface of the belt conveyor 110 in a covering manner, and forms a guide cavity 126 with two open ends together with the upper surface of the belt conveyor 110, and two ends of the guide chute 121 are respectively provided with a guide chute inlet 1211 and a guide chute outlet 1212. A first flaring 1213 is provided on the top wall of the chute 121 near the chute inlet 1211, the first flaring 1213 corresponding to the blanking point 116. The guide chute 121 seals the gap between the guide chute 121 and the belt 113 through the tail box 122 and the skirt seal rubber 128, and the dust suppression curtain assembly 124 slows down the induced wind generated by the blanking point 116.
The electrostatic precipitator 130 sets up in the baffle box 121 be close to baffle box export 1212 department, and electrostatic precipitator 130 includes controlling means and a plurality of electrostatic precipitator unit 132, and a plurality of electrostatic precipitator unit 132 vertical parallel arrangement is equipped with air intake 1323 in the bottom of every electrostatic precipitator unit 132, and the top is equipped with open air outlet 1324, air outlet 1324 and external intercommunication.
An air passage 140 is connected between the electrostatic dust collection device 130 and the material guiding cavity 126, the bottom 141 of the air passage is communicated with the material guiding cavity 126, and the upper 142 of the air passage is communicated with bottom air inlets 1323 of the electrostatic dust collection units 132.
The control device is used for controlling the electrostatic dust collector 130 to intermittently and electrostatically adsorb in turn so that the dust particles adsorbed by the electrostatic dust collector unit 132 fall back to the upper surface 1131 of the belt.
The belt conveyor transfer point dust removal system 100 in the embodiment of the application is provided with an unpowered dust removal device 120 and an electrostatic dust removal device 130, when a material falls onto the belt conveyor 110 from a first flaring 1213, the belt conveyor 110 conveys the material along a first direction, the material is brought into a guide chute 121, and the guide chute 121 primarily suppresses the dust emission through a tail box 122, a skirt seal rubber 128 and a dust suppression curtain assembly 124; further, the electrostatic precipitator 130 draws air from the material guiding groove 121 and performs electrostatic precipitation, not only sucks dust air flow out of the material guiding groove 121 from the air passage bottom 141, but also controls the electrostatic precipitator 130 to intermittently and alternately perform electrostatic adsorption by the control device, so that dust particles adsorbed by the electrostatic precipitator unit 132 fall back to the upper surface 1131 of the belt. With this arrangement, not only the dust carried in from the side of the inlet 1211 of the guide chute is sucked out of the guide chute 121 and electrostatically removed, but also the dust emission at the outlet 1212 of the guide chute is well alleviated. After the electrostatic precipitator unit 132 sucks the dust airflow and performs electrostatic precipitation, the purified air can flow out of the air outlet 1324 freely, and cannot accumulate in the dust chamber of the electrostatic precipitator unit 132 to bring about a dust storm risk. The control device controls the intermittent operation of the electrostatic dust collector, so that the action of adsorption, release and re-adsorption can be realized, dust particles can be collected and then uniformly fall back to the belt 113, an additional cloth bag for collecting the dust particles is omitted, and the smoothness of a gas path is also maintained.
Compared with the existing belt conveyor dust removing device, the belt conveyor transfer point dust removing system 100 in the embodiment of the application can realize safe, reliable and efficient dust removal at the transfer point, and the material falls onto the belt conveyor 110 from the blanking point 116 to seriously raise dust, so that the dust is basically free from when the material is output from the guide chute outlet 1212.
The following structures and interconnections of the components of the belt conveyor transfer point dust removal system 100 of the embodiments of the present application.
Referring to fig. 1, the belt conveyor 110 includes a first end 111 and a second end 112, the first end 111 is provided with a blanking point 116, and the second end 112 is a blanking end 117 for connecting with a next process.
A specific configuration of the belt conveyor 110 is exemplified below.
Referring to fig. 1, a belt conveyor 110 includes a frame 115, a belt drive mechanism, and a belt 113. The belt driving mechanism comprises a motor (not shown in the figure), a driving shaft and a driven shaft (not shown in the figure), wherein the driving shaft and the driven shaft are respectively rotatably arranged at the front end and the rear end of the frame 115, and the motor is arranged on the frame 115 and is in transmission connection with the driving shaft. The driving shaft and the driven shaft drive the belt 113 to travel in the first direction together under the driving of the motor.
The belt upper surface 1131 is used to transport material. It will be readily appreciated that as the belt 113 travels in the first direction, material falls from the blanking point 116 onto the belt upper surface 1131, being conveyed by the belt 113 to the second end 112.
In some embodiments of the application, the material is pulverized coal and the dust particles in the gas stream are pulverized coal dust.
In other embodiments, the material may be sand, crushed concrete, or other powder that is prone to dust.
Referring to fig. 1 and 2, the unpowered dust removing device 120 is used for unpowered physical dust fall.
In some embodiments of the present application, the unpowered dust removing device 120 includes a guide chute 121, a tail box 122, and a curtain.
The guide chute 121 covers the upper surface of the belt conveyor 110, and the guide chute 121 includes a guide chute inlet 1211 and a guide chute outlet 1212. A first flaring 1213 is arranged on the top wall of the guide chute 121, which is close to the guide chute inlet 1211, the first flaring 1213 corresponds to the blanking point 116, and the material falls into the first flaring 1213 at a high position and falls onto the upper surface 1131 of the belt from the first flaring 1213.
The guide chute 121 is used for reducing dust emission during conveying of materials along a first direction after the materials fall onto the upper surface 1131 of the belt from the blanking point 116.
Optionally, the guide channel 121 includes a top wall and two side walls that together form the guide cavity 126 with the belt upper surface 1131. The two sidewalls are vertically disposed on the left and right sides of the upper surface 1131 of the belt.
Referring to fig. 4, a skirt seal rubber 128 is used to seal between the sidewall and the belt 113.
It is easy to understand that the material is easy to generate dust after falling into the belt surface 1131 from the blanking point 116, and then the material is conveyed along the first direction and enters the material guiding cavity 126, and the material guiding groove 121 can reduce the spread of the dust of the material to the surrounding, so as to perform the preliminary dust fall and dust removal function.
Referring to fig. 1, in some embodiments of the present application, the length L 1 of the guide chute 121=15-20 m. Through this kind of arrangement form, can alleviate the raise dust phenomenon of material, can reduce the manufacturing cost of device again.
The boot 122 is disposed at the baffle box inlet 1211 and seals the baffle box inlet 1211.
It will be readily appreciated that when material falls from the drop point 116 to the belt upper surface 1131, the dust particles spread out and the boot 122 encases the chute inlet 1211, thereby mitigating dusting of the drop point 116 near the first end 111.
The curtain is arranged at the outlet 1212 of the guide chute, and when the material is conveyed along the first direction, induced wind along the first direction is generated, so that the dust is driven to flow along the first direction. The curtain can block dust carried by the material when the material is output from the material guide groove 121, so that the dust falling effect is realized.
Referring to fig. 4, optionally, the belt conveyor transfer point dust removal system 100 further includes a dust suppression curtain assembly 124, where the dust suppression curtain assembly 124 is disposed along the length of the chute 121 from the first flare 1213 to a section adjacent to the electrostatic precipitator device 130.
By the arrangement, induced wind generated by the blanking point 116 can be slowed down, so that dust in air flow is settled.
Referring to fig. 4, the dust suppressing curtain assembly 124 includes a plurality of dust suppressing half curtains 1241, the plurality of dust suppressing half curtains 1241 are arranged inside the guide chute 121 at intervals along the length direction of the guide chute 121, and the guide chute 121 and the plurality of dust suppressing half curtains 1241 together form a section of S-shaped channel along the length direction of the guide chute 121.
Under the action of the electrostatic precipitator 130, the airflow entering the air passage 140 includes two parts, one part of the airflow passes through the S-channel of the dust suppression curtain assembly 124 in the first direction and then enters the air passage bottom 141, and the other part of the airflow enters the air passage bottom 141 from one side of the guide chute outlet 1212 in the reverse direction of the first direction, and forms a negative pressure zone 1214 in a region close to the guide chute outlet 1212.
Referring to fig. 5, as an example of a specific configuration of the dust suppressing half curtain 1241, the dust suppressing half curtain 1241 includes a dust suppressing half curtain body 1242 and a rotating shaft 1243, the rotating shaft 1243 is connected to an upper side of the dust suppressing half curtain body 1242, and the rotating shaft 1243 is rotatably mounted on a top wall of the guide chute 121. For example, the top cover is provided with a slot, the rotating shaft 1243 is laterally inserted into the slot, two ends of the rotating shaft 1243 are fixed on the guide chute 121, and under the action of air flow, the air flow pushes the dust suppression semi-curtain body 1242 to rotate around the rotating shaft 1243 to open. The arrangement form is easy to assemble and long in service life.
Further, the dust suppressing half curtain 1241 is a rubber soft curtain. The surface of the rubber soft curtain has elasticity, can absorb impulse when dust particles flow, and promotes sedimentation of the dust particles.
Referring to fig. 1, the electrostatic precipitator 130 includes a mounting frame 131 and a plurality of electrostatic precipitator units 132.
The bottom air inlet 1323 and the air outlet 1324 of the electrostatic precipitator unit 132 are open at two ends, the middle is free from a closed space, the possibility of dust storm is avoided, and the power required by induced air is lower.
The electrostatic dust collector 130 is disposed at a position of the guide chute 121 near the guide chute outlet 1212, and is configured to further form a negative pressure area 1214 on the top wall of the guide chute 121 based on the unpowered dust collector 120, guide dust in the guide cavity 126 to flow toward the negative pressure area 1214, enter the electrostatic dust collector 130, and exhaust air after being processed by the electrostatic dust collector 130.
Referring to fig. 1 and 3, as a specific implementation manner of "the air inlet 1323 communicates with the guide chute 121", a plurality of second flares 1215 are disposed on a top wall of the guide chute 121 near the guide chute outlet 1212, the second flares 1215 are in one-to-one correspondence with the bottom air inlets 1323 of the electrostatic precipitator units 132, the second flares 1215 are disposed below the bottom air inlets 1323 of the corresponding electrostatic precipitator units 132, and the air passage bottom 141 further includes an air passage air inlet 143. The air inlet 143 of the air passage is communicated with the material guiding cavity 126, and the air passage 140 is used for feeding air upwards into the electrostatic dust collection device 130.
A plurality of second flares 1215 are communicated with the material guiding cavity 126, and the plurality of second flares 1215 are used for allowing air to flow upwards into the electrostatic dust collection device 130; and, when the electrostatic precipitator assembly 1322 is de-energized, dust particles fall back from the bottom air inlet 1323 to the belt upper surface 1131 of the belt conveyor 110 through the corresponding second flare 1215.
Further, the bottom air intake 1323 of each electrostatic precipitator unit 132 is provided with a flow straightening plate to guide the air flow into the electrostatic precipitator units 132 uniformly.
Through this kind of arrangement, not only can improve electrostatic precipitator efficiency, open partial electrostatic precipitator unit 132 operation in order to reduce power consumption when the raise dust is less, can also set up some reserve electrostatic precipitator units to increase electrostatic precipitator 130's reliability.
As one example form, the electrostatic precipitator units 132 are provided with three groups, each group comprising two electrostatic precipitator units 132, the three groups of electrostatic precipitator units 132 being arranged immediately adjacent in the first direction.
The electrostatic precipitator unit 132 is supported on the mounting frame 131, the air inlet 1323 is provided with a rubber hose 1325, and the rubber hose 1325 and the second flaring 1215 are vertically opposite, so that the assembly is convenient, and the slight shaking of the electrostatic precipitator unit 132 and the guide chute 121 in the working process can be allowed.
Further, the aperture of the second flare 1215 is larger than the aperture of the air inlet 1323 to guide the dust air flow into the electrostatic precipitator 130.
Optionally, a plurality of electrostatic precipitator units 132 are arranged next to each other in sequence along the length direction (i.e. the first direction) of the guide chute 121.
With this arrangement, the plurality of second flares 1215 are compactly arranged in the first direction, enabling a strong suction effect to be formed in the negative pressure region 1214.
Referring to FIG. 1, further, the distance L 3 between the electrostatic precipitator unit 132 located near the outlet 1212 of the chute and the outlet 1212 of the chute is less than or equal to 2m.
By the arrangement mode, negative pressure can be effectively formed at the outlet 1212 of the guide chute, and dust particles are prevented from being diffused out of the guide chute 121 along with the output of materials. The dust-raising phenomenon of the guide chute outlet 1212 is well inhibited by the cooperation of the baffle curtain.
A specific configuration of the electrostatic precipitator unit 132 is exemplified below.
Referring to fig. 6, the electrostatic precipitator unit 132 includes an induced draft fan 1321 and an electrostatic dust collection assembly 1322. The induced draft fan 1321 and the electrostatic precipitator component 1322 are arranged in a vertically communicated manner, and the induced draft fan 1321 can guide the air flow formed from bottom to top, so that the air flow passes through the electrostatic precipitator component 1322.
Specifically, the electrostatic precipitator 1322 is located below the induced draft fan 1321, and the induced draft fan 1321 can form a negative pressure to guide the airflow to flow upward from the air inlet 1323.
Preferably, the induced draft fan 1321 is an axial flow fan, which has low electricity consumption and can reduce electricity consumption under the same air quantity.
In other embodiments, the induced draft fan 1321 may also be a centrifugal fan.
The electrostatic dust collection assembly 1322 comprises a cathode plate and a collecting polar plate, an electrostatic dust collection chamber is formed between the collecting polar plate and the cathode plate, and the electrostatic dust collection chamber is used for carrying out electrostatic dust collection on air flow passing through the electrostatic dust collection chamber from bottom to top and intercepting dust particles in the air flow.
For example, the electrostatic precipitator unit 132 is a cylindrical electrostatic precipitator filter element, and a channel is provided in the axial center from bottom to top to allow the electrostatic precipitator unit 132to pass through.
The control device is used for controlling the electrostatic dust collection assemblies 1322 of the plurality of electrostatic dust collector units 132 to alternately and intermittently perform power-off operation. By the action of "adsorption-release-re-adsorption", the dust particles are sucked up and then fall back down on the belt 113, omitting the means for collecting the adsorbed dust particles.
When the electrostatic dust collection component 1322 is electrified, the electrostatic dust collection component 1322 adsorbs dust particles in the airflow through the action of an electrostatic field;
When the electrostatic precipitator component 1322 is powered off, the electrostatic precipitator component 1322 shakes the adsorbed dust particles from the collecting plate of the electrostatic precipitator component 1322 by a rapping action, the dust particles fall down and enter the second flared opening 1215 from the bottom air inlet 1323, and are directly discharged from the second flared opening 1215 to the upper surface 1131 of the belt.
Specifically, when the electrostatic precipitator 1322 is energized, a negative electric field is formed in the electrostatic precipitator, and dust particles carry positive charges and are collected on the collecting plate. When the electrostatic precipitator 1322 is powered off, no electric field exists in the electrostatic precipitator, and dust particles fall back onto the belt 113.
The dust-removed air flows out of the electrostatic precipitator unit 132 from the air outlet 1324 and is discharged to the outside environment.
Referring to FIG. 1, as an exemplary embodiment, the distance L 2 between the blanking point 116 and the electrostatic precipitator 130 is greater than or equal to 6m. With this arrangement, there is enough space to arrange the electrostatic precipitator 130 and negative pressure can be effectively formed in the material guiding chamber 126.
Optionally, an operation platform 134 is disposed on the mounting frame 131, and a control device is disposed on the mounting frame 131, so that a worker can conveniently overhaul and maintain the electrostatic precipitator unit 132.
Optionally, the belt conveyor transfer point dust removal system 100 further includes a remote control system, the control device being one of the control elements in the remote control system. The remote control system can monitor and adjust the dust removal real-time state and fault condition of the electrostatic dust removal device 130. By means of the remote control system, the operation of the electrostatic precipitator 130 in a dust-free environment is facilitated for workers.
The working principle of the belt conveyor transfer point dust removal system 100 in the embodiment of the application is as follows:
The material falls from the blanking point 116 to the upper surface 1131 of the belt through the first flaring 1213, the belt 113 is driven by the belt driving mechanism to move along the first direction, and the material is conveyed along the first direction and enters the guide chute 121;
The tail box 122 relieves dust emission of the blanking point 116 near the first end 111;
the material is conveyed in the material guide groove 121 along the first direction, the material guide groove 121 wraps the material, the first dust suppression curtain assembly 124 increases wind resistance of induced wind, reduces wind speed of the induced wind, and achieves preliminary dust sedimentation;
The induced draft fan 1321 operates and creates a negative pressure zone 1214 in the guide chute 121, on the one hand, directing induced air in a first direction through the dust suppression curtain assembly 124, and on the other hand, inducing airflow in a reverse direction from the guide chute outlet 1212 in the first direction, and creates a negative pressure zone 1214 near the guide chute outlet 1212;
In the negative pressure area 1214, the electrostatic precipitator unit 132 sucks the air flow out of the guide chute 121 upwards and discharges the air flow to the external environment from the air outlet 1324 to form a smooth air path;
The air flow continuously passes through the electrostatic dust collection component 1322, the electrostatic dust collection component 1322 is intermittently powered on and off, and dust particles and dust are repeatedly collected and released to fall onto the belt 113;
the materials are output from the material guide groove outlet 1212, and the negative pressure environment of the material guide groove outlet 1212 is matched with the function of a baffle curtain, so that the output materials basically have no dust emission phenomenon;
The material is discharged from the chute outlet 1212 of the chute 121 and enters the next process step from the discharge end 117 of the belt conveyor 110.
Compared with the existing belt conveyor dust removal device, the belt conveyor transfer point dust removal system 100 in the embodiment of the application combines the unpowered physical dust removal mode and the electrostatic dust removal mode to form a common air path, induced air enters the guide chute 121 from the guide chute inlet 1211, flows out from the air outlet 1324 of the electrostatic dust collector unit 132, maintains negative pressure at the guide chute outlet 1212, adsorbs dust particles in the air flow in an intermittent adsorption mode, and releases the dust particles back to the belt 113, thereby omitting an additional dust collection bag. The belt conveyor transfer point dust removal system 100 can realize safe, reliable and efficient dust removal at the transfer point, and the material falls to the belt conveyor 110 from the blanking point 116 to seriously raise dust, so that no dust is generated basically when the material is output from the guide chute outlet 1212.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a belt conveyor transfer point dust pelletizing system, is applied to belt conveyor, its characterized in that includes:
The unpowered dust removing device comprises a guide chute, a tail box, skirt edge sealing rubber and a dust suppression curtain component;
The guide chute is used for covering the upper surface of the belt conveyor and forms a guide cavity with two ends open together with the upper surface of the belt conveyor, a first flaring is arranged on the top wall of the guide chute, which is close to the inlet, and the first flaring corresponds to a blanking point of the belt conveyor;
the guide chute seals a gap between the guide chute and the belt through the tail box and the skirt edge sealing rubber, and the dust suppression curtain component decelerates induced wind generated by a blanking point of the belt conveyor;
The electrostatic dust collection device is arranged at the position, close to the outlet, of the guide groove and comprises a plurality of electrostatic dust collection units which are vertically arranged in parallel, an air passage is connected between the electrostatic dust collection device and the guide cavity, the bottom of the air passage is communicated with the guide cavity, the upper part of the air passage is communicated with air inlets at the bottoms of the electrostatic dust collection units, and an open air outlet is formed in the top of the electrostatic dust collection unit;
The control device is used for controlling the electrostatic dust collection device to alternately and intermittently carry out electrostatic absorption so as to enable dust particles absorbed by the electrostatic dust collection unit to fall back to the upper surface of the belt conveyor;
The electrostatic dust collector unit comprises an induced draft fan and an electrostatic dust collection assembly, wherein the induced draft fan and the electrostatic dust collection assembly are arranged in an up-down communication mode, and the induced draft fan can guide air flow formed from bottom to top so that the air flow passes through the electrostatic dust collection assembly;
The electrostatic dust collector units are sequentially and closely arranged along the length direction of the guide chute, and the distance value between the electrostatic dust collector units positioned near the outlet of the guide chute and the outlet of the guide chute is less than or equal to 2m.
2. The belt conveyor transfer point dust removal system of claim 1, wherein the control device is in signal connection with electrostatic dust collection assemblies of the plurality of electrostatic precipitator units, and the control device is used for controlling the electrostatic dust collection assemblies of the plurality of electrostatic precipitator units to alternately and intermittently perform power-off operation;
When the electrostatic dust collection assembly is electrified, dust particles are adsorbed in the electrostatic dust collection assembly through the action of an electrostatic field;
when the electrostatic dust collection assembly is powered off, the electrostatic dust collection assembly directly discharges the adsorbed dust particles to the upper surface of the belt conveyor through rapping.
3. The belt conveyor transfer point dust removal system of claim 2, wherein a top wall of the guide chute near the outlet is provided with a plurality of second flares, the second flares are in one-to-one correspondence with bottom air inlets of the electrostatic precipitator units, each second flares is arranged below a bottom air inlet of a corresponding electrostatic precipitator unit, and the bottom of the air passage further comprises an air passage air inlet;
The air inlet of the air passage is communicated with the material guide cavity, and the air passage is used for allowing air to flow upwards into the electrostatic dust collection device;
The second flaring is communicated with the material guiding cavity, the second flaring is used for allowing air flow to enter the electrostatic dust collection device upwards, and dust particles fall back to the upper surface of the belt conveyor from the bottom air inlet through the corresponding second flaring when the electrostatic dust collection assembly is powered off.
4. A belt conveyor transfer point dust removal system as in claim 3 wherein the second flared aperture is greater than the aperture of the inlet of the electrostatic precipitator unit.
5. The belt conveyor transfer point dust removal system of claim 1, wherein the bottom air inlet and air outlet of the electrostatic precipitator unit are open at both ends and have no enclosed space in the middle.
6. The belt conveyor transfer point dust removal system of claim 1, wherein the dust suppression curtain assembly comprises a plurality of dust suppression half curtains spaced apart along a length of the guide chute within the guide chute and disposed at a section from the discharge point to the electrostatic dust removal device, the guide chute and the plurality of dust suppression half curtains together forming an S-shaped channel along the length of the guide chute.
7. The belt conveyor transfer point dust removal system of claim 6, wherein the dust suppression half curtain comprises:
Dust suppression semi-curtain body;
The rotating shaft is connected with the upper side of the dust suppression semi-curtain body and is used for being rotatably installed on the top wall of the guide chute.
8. The belt conveyor transfer point dust removal system of claim 7, wherein the dust suppression half curtain body is a rubber soft curtain.
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| CN202010948586.XA CN111924582B (en) | 2020-09-10 | 2020-09-10 | Dust removing system for transfer point of belt conveyor |
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| CN212268909U (en) * | 2020-09-10 | 2021-01-01 | 北京普瑞众合国际科技有限公司 | Dust removal system for transfer point of belt conveyor |
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| JP3915018B2 (en) * | 1997-07-08 | 2007-05-16 | Ｊｆｅスチール株式会社 | Dustproof device for belt conveyor |
| CN204453715U (en) * | 2015-02-09 | 2015-07-08 | 泰州市智宏电力机械制造有限公司 | A kind of power-free dust-removing system for enclosed belt conveyor guide chute |
| CN209322078U (en) * | 2018-11-22 | 2019-08-30 | 厦门力祺环境工程有限公司 | A kind of environmental-friendly dust suppression bulk guide tank systems based on the design of electrostatic precipitation principle |
| CN210884056U (en) * | 2019-10-22 | 2020-06-30 | 浙江弗戈科技发展有限公司 | Dust removal equipment for return route of belt conveyor |
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| CN212268909U (en) * | 2020-09-10 | 2021-01-01 | 北京普瑞众合国际科技有限公司 | Dust removal system for transfer point of belt conveyor |
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