CN102874615A - Dust suppression and fall system used in process of conveying high-dust material by belt type conveyor - Google Patents
Dust suppression and fall system used in process of conveying high-dust material by belt type conveyor Download PDFInfo
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- CN102874615A CN102874615A CN 201210405821 CN201210405821A CN102874615A CN 102874615 A CN102874615 A CN 102874615A CN 201210405821 CN201210405821 CN 201210405821 CN 201210405821 A CN201210405821 A CN 201210405821A CN 102874615 A CN102874615 A CN 102874615A
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Abstract
The invention relates to a dust suppression and fall system used in a process of conveying a high-dust material by a belt type conveyor. The dust suppression and fall system comprises a full-closed guide groove, a plurality of water mist nozzles, a water supply device, a plurality of electromagnetic valves and a control system, wherein the full-closed guide groove comprises a sliding plate and a belt, a cover plate is arranged above the guide groove to ensure that the guide groove is of a closed straight cylinder structure, and the tail part of the guide groove is provided with a rear blocking device; the water mist nozzles are respectively arranged on an inlet of a fall pipe, on a fall point, in a tail space of the guide groove, and inside the guide groove along the length direction of the guide groove, each water mist nozzle is arranged above the dust raising direction and faces towards the dust raising direction; the water supply device is connected with the plurality of water mist nozzles through pipelines and used for supplying water to the water mist nozzles; the electromagnetic valves are respectively arranged between the water mist nozzles and a water pump and used for controlling the water mist nozzles; and the control system is connected with the electromagnetic valves and the water supply device are used for receiving a control signal for controlling the operation of the electromagnetic valves and the water supply device. The dust suppression and fall system is capable of remarkably reducing air pollution, integrates functions of dust sealing, dust suppression and dust fall, and is simple to construct and little in maintenance quantity.
Description
Technical field
The present invention relates to a kind of dust falling system, relate in particular to a kind of dust suppression dust falling system that belt conveyer is carried high particulate dust that is applicable to.
Background technology
At present, for the enterprises such as thermal electric generation, manufacture of cement, the elimination of dust contamination that produces in the fuel delivery event is a difficult problem always.Belt conveyer is thermal power plant's material transfer equipment commonly used, material, for example coal-fired, in transport process, produce a large amount of dust, especially high particulate dust, for example Xinjiang Guang Hui coal are arranged, Xinjiang Guang Hui coal belongs to a kind of of aforementioned particulate dust, it belongs to brown coal, and dust content is large, is the coal that Chinese Guanghui Stocks Trading Co. limited energy company produces in the Xinjiang, China area.The reason that conveying system transfer point dust produces is more, for example, raw material drying (surface moisture is low) Yi Qichen, transfer point equipment (material blanking tube, deflector chute, flapper etc.) is poorly sealed, belt conveyer operation exception (sideslip, up and down fluctuation etc.), dusting equipment is unreliable etc.But, its major cause is that material material blanking tube drop in transport process produces induced air, each transfer point higher level belt and subordinate's belt have drop in various degree, when logistics is passed through, the logistics that falls at a high speed makes the air in the coal spout compressed, produce air-flow, cause deflector chute outlet and material blanking tube entrance dust from flying.The dust collection method of the present widespread use of the enterprise such as thermal powerplant, cement mill material-transporting system transfer point mainly contains dry dust removal and wet dust removal.Dry dust removal is used wider with bag-type dust and two kinds of technology of electrostatic precipitation.Wet dust removal is mainly take spraying and dedusting and medicament dedusting as main.Its Chinese medicine dedusting also can be described as the extension of spraying and dedusting technology, and the dust suppression medicament is added in the sprinkling equipment, improves anti-dust effect, and is inhibited to the dust of uncontrollable discharge, but the ability of processing fine dusts is lower, causes efficiency of dust collection not high.
Particularly, dry dust removal all is to adopt the negative pressure suction type principle, mainly is represented as bag dust collector, its by negative-pressure air fan with the compound of ash and air in pipeline is extracted into bag dust collector, the filtration by cloth bag is with ash and air separation.Air enters atmosphere by cloth bag inside through the negative-pressure air fan outlet.Ash is because action of gravitation falls into grey storehouse through blocking valve.
Affect the many factors of bag dust collector, character, purge mode of filtration velocity, loss of pressure, filtrate etc. are arranged, therefore, there is following shortcoming in it: the cloth bag hygroscopic character is large, and easily fouling is not antistatic, not fire-retardant, the long-term work aeration is poor, affects dust removing effects; Dust exhaustor produces secondary pollution in deashing process; In unreasonable and section's class hour not of dust exhaustor deashing, can cause energy loss.The size of equipment yield no matter, dust exhaustor all carries out deashing within the time of setting, and when Dust Capacity during greater than dust exhaustor blowback setting-up time, dust exhaustor produces resistance of motion, affect efficiency of dust collection, motor overload is moved easily motor is damaged; Equipment is aging easily, and maintenance cost is high, and maintenance load is large, and service life is short, and floor area is larger; Dust is difficult to collect when source of pollution disperse, and when some characteristic dust (as: coal dust) when reaching finite concentration, will blast in the situation of high temperature, naked light, electro spark, friction, bump; Must consider the characteristic of dusty gas when selecting filtrate, the characteristics such as that its filtrate of General Requirements has is wear-resisting, corrosion resistant, resistance are low, long service life, thus increased the manufacturing expense of filter bag; The character of filtrate has determined that bag dust collector has limitation with respect to dust; Regulation effect is poor, although discharge value reaches the 50mg/m3 of permission, pollutes the 10mg/m3 of the equal out of reach regulation of on-the-spot improvement index.
For wet dust removal, the representative of wet dust removal mainly is spraying and dedusting, and it is to install water spray system additional in positions such as belt deflector chute leading portions to make the humidity increase of material reach the purpose that has been difficult for dirt.But also there is multinomial defective in spraying and dedusting, and for example, water consumption is huge; The calorific value loss of coal large (if the material of carrying is coal-fired); Coal mud clearing causes the loss of coal and increases the coal slime processing cost; The poor standard that can't reach the 10mg/m3 of regulation of regulation effect.
The spray equipment that the belt conveyer transfer point is installed is generally installed at the deflector chute exit end, and dust is not concentrated, and does not concentrate the dirt that goes out, and spray water droplet granularity is large, can not suppress the granule dust, usually more than 100 μ m, can't be combined with short grained dust and suppress dust pollution.The water spray is inhomogeneous to the material humidification, cause humidity of materials excessive, produce some defectives such as material-transporting system equipment material glues, blocks up, thermal power generation corporations can cause the other problemses such as the undercapacity of pulverized coal preparation system equipment, the combustion efficiency that reduces boiler, increase coal consumption.
Summary of the invention
The object of the present invention is to provide a kind of belt conveyer to carry the dust suppression dust falling system of high particulate dust, limited and cause the problem of material-transporting system defective to solve water spray system dust-laying effect that prior art exists.
In order to address the above problem, the invention provides a kind of belt conveyer and carry the dust suppression dust falling system of high particulate dust, it comprises: totally-enclosed deflector chute, comprise slide plate and belt, described deflector chute top is provided with cover plate so that described deflector chute is enclosed straight-tube shape structure, and the afterbody of described deflector chute is provided with rear plugging device; A plurality of Multiple Type micron order spraying nozzles, be located at respectively in the trailing space of material blanking tube entrance, the discharging point place of belt conveyer, described deflector chute and be located at the inside of described deflector chute along the length direction of described deflector chute, and each described spraying nozzle is positioned at the airborne dust top and all towards the airborne dust direction; Water service and is connected described Multiple Type micron order spraying nozzle and is connected by pipeline, is used for supplying water to a plurality of described Multiple Type micron order spraying nozzles; A plurality of electromagnetic valves are located at respectively between a plurality of described Multiple Type micron order spraying nozzles and the described water pump, are used for controlling described spraying nozzle; Control system, with described a plurality of electromagnetic valves be connected water service and be connected, be used for reception control signal to control the operation of described a plurality of electromagnetic valve and described water service.
According to a kind of preferred implementation that above-mentioned belt conveyer is carried the dust suppression dust falling system of high particulate dust, wherein, the cover plate of described deflector chute top is arc.
According to a kind of preferred implementation that above-mentioned belt conveyer is carried the dust suppression dust falling system of high particulate dust, wherein, described deflector chute inside is provided with a plurality of dust-break curtains, and a plurality of described dust-break curtains are along the length direction setting of described deflector chute.
Carry a kind of preferred implementation of the dust suppression dust falling system of high particulate dust according to above-mentioned belt conveyer, wherein, the upper limb that is positioned at the described slide plate of described belt down either side is equipped with vertical side plate, be provided with described cover plate between the upper limb of described side plate, the inboard of described side plate is provided with the skirtboard of arc, the inboard of described side plate is fixed in the top of described skirtboard, and the upper surface of described belt is close to by the bottom of described skirtboard.
Carry a kind of preferred implementation of the dust suppression dust falling system of high particulate dust according to above-mentioned belt conveyer, wherein, also comprise the skirtboard adapter plate, the cross section of described skirtboard adapter plate is Z-shaped, the upper flange of described skirtboard adapter plate is fixed in the inboard of described side plate, the lower wing plate of described skirtboard adapter plate is captiveed joint with the top of described skirtboard, and the wing centre section plate level of described skirtboard adapter plate arranges.
Carry a kind of preferred implementation of the dust suppression dust falling system of high particulate dust according to above-mentioned belt conveyer, wherein, also comprise keel plate, the cross section of described keel plate is L-shaped, the lower wing plate of described keel plate is fixed in the inboard of described side plate, the upper flange of described keel plate is horizontally disposed with, and the edge of described cover plate is fixed on the upper flange of described keel plate.
By upper analysis, the deflector chute that belt conveyer of the present invention carries the dust suppression dust falling system of high particulate dust to adopt is totally-enclosed from the depositing dust deflector chute, then adopt micron order water smoke technology, the varigrained inorganization dust that produces in the belt feeder transfer point transhipment material process is suppressed to be deposited in the deflector chute of sealing, reach the dirt that goes out in a organized way, forbid flying away in the transfer point space, can obviously reduce aerial contamination.Can effectively solve the elimination of dust contamination difficult problem that the enterprises such as thermal electric generation, manufacture of cement produce in carrying high particulate dust process, be that a kind of envelope dirt adds the technique that dust suppression, depositing dust combine, and construction is simple, and maintenance is little.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the deflector chute tail structure scheme drawing of the embodiment of the invention;
Fig. 2 is the plan structure scheme drawing of the deflector chute afterbody of the embodiment of the invention;
Fig. 3 is control system, water pump, the electromagnetic valve of the embodiment of the invention, the connection structure scheme drawing of spraying nozzle;
Fig. 4 is the cross-sectional view of the deflector chute of the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing of the present invention, technical scheme of the present invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1-Fig. 4 shows control structure and the physical construction of the embodiment of the invention, and as shown in the figure, the embodiment of the invention comprises deflector chute 100, control system 6, the water pump 7 as water service, a plurality of spraying nozzle 81-83.Wherein, deflector chute 100 comprises carrying roller 1, slide plate 2, belt 3, deflector chute 100 tops are provided with cover plate 53, in the present embodiment, cover plate 53 is curved, and the upper limb of slide plate 2 is fixed in by keel plate 52, side plate 51 in its two edges, whereby, so that deflector chute 100 is enclosed straight-tube shape structure, and the afterbody of deflector chute 100 is provided with rear plugging device (not shown) so that afterbody is full-closed structure.The water fog particle that a plurality of Multiple Type micron order spraying nozzle 81-83 are generation is micron-sized water smoke, so that the better depositing dust dust suppression of water smoke.Each spraying nozzle 81-83 is located at respectively in the trailing space of material blanking tube entrance, discharging point place, deflector chute 100 and is located at the inside of deflector chute 100 along the length direction of deflector chute 100, and each spraying nozzle 81,82 or 83 is positioned at the airborne dust top also all towards the airborne dust direction, for example, as shown in Figure 4, spraying nozzle 81 is located at the inside of deflector chute 100 along the length direction of deflector chute 100, such as Fig. 1 and Fig. 2, spraying nozzle 82 is positioned at the top of the conveyer 92 of transfer point, and spraying nozzle 83 is positioned at the below of the conveyer 91 of transfer point.Water pump 7 with are connected spraying nozzle 81-83 and connect by trunk line 80 and other laterals, be used for supplying water to a plurality of spraying nozzle 81-83.A plurality of electromagnetic valves 631,632,633 are located at respectively between a plurality of spraying nozzle 81-83 and the water pump 7, are used for control spraying nozzle 81-83, and wherein spraying nozzle 81-83 grouping arranges, and electromagnetic valve 631,632 or 633 can be controlled one group of spraying nozzle.Control system 6 is connected with water pump with a plurality of electromagnetic valve 631-633 and is connected, be used for reception control signal to control the operation of a plurality of electromagnetic valve 631-633 and water pump 7, when for example defeated coal begins, start control system 6, make its control water pump 7 water supply, a plurality of electromagnetic valve 631-633 to the airborne dust atomized water spray.Control system 6 can have for PLC etc. integrated circuit and the corresponding auxiliary circuit of data-handling capacity.
In the present embodiment, deflector chute 100 inside are provided with a plurality of dust-break curtain (not shown), and a plurality of dust-break curtains are along the length direction setting of deflector chute 100.
In the deflector chute 100 of present embodiment, slide plate 2 is positioned at the down either side of belt 3, the upper limb that is fixed in slide plate 2 that the lower edge of side plate 51 is vertical.The cross section of skirtboard adapter plate 41 is Z-shaped, and its upper flange is fixed in the inboard of side plate 51, and the lower wing plate of skirtboard adapter plate 41 is captiveed joint with the top of skirtboard 42, and the wing centre section plate level of skirtboard adapter plate 41 arranges.Wherein, skirtboard 42 is curved, and the upper surface of belt 3 is close to by its bottom, to prevent flour dust overflow.Be provided with keel plate 52 between the upper end of side plate 51 and the cover plate 53, to increase the intensity of deflector chute 100, the cross section of keel plate 52 is L-shaped, and its lower wing plate is fixed in the inboard of side plate 51, its upper flange is horizontally disposed with, and the edge of cover plate 53 is fixed on the upper flange of keel plate 52.
To sum up, the embodiment of the invention is at first transformed conveyer afterbody deflector chute, and design and installation has totally-enclosed deflector chute from the depositing dust function.Totally-enclosed under the prerequisite of depositing dust deflector chute in installation, utilize the micron order water mist dust suppression.Particularly, carry out water mist dust suppression by totally-enclosed micron order spraying nozzle from depositing dust deflector chute, a plurality of different models, water pump, control system, pipeline, cable etc.Spraying nozzle is installed on discharging point and the different sections of discharging point front and back ends in material blanking tube entrance, the deflector chute.The deflector chute afterbody arranges rear plugging device, can reduce and impact the dust leakage that malleation causes to afterbody, and simultaneously, present embodiment arranges negative pressure chamber, makes negative pressure chamber's one-tenth negative pressure in the belt operational process, and spraying nozzle is installed simultaneously.Totally-enclosed top from the depositing dust deflector chute is arch roof, and surge volume is large, is provided with multilayer dust-break curtain the dust-contained airflow in the deflector chute is slowed down through multistage dust-break curtain, greatly reduces deflector chute outlet wind speed.
In addition, the nozzle of different model can be installed with the head hopper in deflector chute simultaneously, and interlock with three-way baffle plate.At conveyer hopper sealing case inlet point the dust-break curtain that polyurethane material is made is installed, with the minimizing intake, and is prevented from running powder, can improve the effect of spray dust-arrest.
Comprehensively above-mentioned, the present invention is based on aerodynamic principle: when the air-flow that contains grit was walked around droplet, it is relevant with the diameter of droplet that droplet catches the probability of grit in the air-flow.When droplet was large, grit only was to stream to walk around droplet and at large catching.When droplet was close with the grit footpath, easier dirt was lived in seizure with the grit collision.Use this principle and produce the following water smoke of 200 μ m, and can produce the following water fog particle of 10 μ m, the droplet close with fine dust size caught dust, can effectively adsorb the following dust of 200 μ m, particularly to PM10 and the respirable dust particle below the PM2.5, dust is suppressed to sink in the confined bed hopper, prevent from flying away in the transfer point space.When the dust granules of water smoke and different-diameter be in contact with one another, when colliding, make dust granules mutually bond, condense and become large, and sedimentation under the Action of Gravity Field of self, thereby reach the effect of dust suppression, therefore, the present invention can fundamentally solve the pollution of respirable dust and operating personnel's the occupational diseases such as pneumoconiosis injury.Greatly reduce the transfer point dust concentration, minimizing equipment and building exterior cleaner work amount.
As from the foregoing, the present invention has multiple advantages, for example, deflector chute is carried out totally-enclosed, dust is concentrated on enclosure space enclose and destroy it, has stopped the diffusion of dust in the space.To the following different-grain diameter of 200 μ m dust catch to eliminate.Especially the following dust of PM10 is caught and eliminate, dust suppression efficient is high.Atomizing effect is good, and water consumption is little, and is even to the material humidification, do not cause sticking, the stifled problem of material transfer equipment.Construction technique is simple, and maintenance is little, good reliability.Do not use dust exhaustor, reduce investment outlay.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (6)
1. a belt conveyer is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, comprising:
Totally-enclosed deflector chute comprises slide plate and belt, and described deflector chute top is provided with cover plate so that described deflector chute is enclosed straight-tube shape structure, and the afterbody of described deflector chute is provided with rear plugging device;
The micron order spraying nozzle of a plurality of Multiple Types, be located at respectively in the trailing space of the material blanking tube entrance of belt conveyer and discharging point place, described deflector chute, be located at the inside of described deflector chute along the length direction of described deflector chute, and each described spraying nozzle is positioned at the airborne dust top and all towards the airborne dust direction;
Water service and is connected described Multiple Type micron order spraying nozzle and is connected by pipeline, is used for supplying water to a plurality of described Multiple Type micron order spraying nozzles;
A plurality of electromagnetic valves are located at respectively between a plurality of described Multiple Type micron order spraying nozzles and the described water pump, are used for controlling described spraying nozzle;
Control system, with described a plurality of electromagnetic valves be connected water service and be connected, be used for reception control signal to control the operation of described a plurality of electromagnetic valve and described water service.
2. belt conveyer according to claim 1 is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, the described cover plate of described deflector chute top is arc.
3. belt conveyer according to claim 1 is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, described deflector chute inside is provided with a plurality of dust-break curtains, and a plurality of described dust-break curtains are along the length direction setting of described deflector chute.
4. belt conveyer according to claim 1 is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, the upper limb that is positioned at the described slide plate of described belt down either side is equipped with vertical side plate, be provided with described cover plate between the upper limb of described side plate, the inboard of described side plate is provided with the skirtboard of arc, the inboard of described side plate is fixed in the top of described skirtboard, and the upper surface of described belt is close to by the bottom of described skirtboard.
5. belt conveyer according to claim 4 is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, also comprise the skirtboard adapter plate, the cross section of described skirtboard adapter plate is Z-shaped, the upper flange of described skirtboard adapter plate is fixed in the inboard of described side plate, the lower wing plate of described skirtboard adapter plate is captiveed joint with the top of described skirtboard, and the wing centre section plate level of described skirtboard adapter plate arranges.
6. belt conveyer according to claim 4 is carried the dust suppression dust falling system of high particulate dust, it is characterized in that, also comprise keel plate, the cross section of described keel plate is L-shaped, the lower wing plate of described keel plate is fixed in the inboard of described side plate, the upper flange of described keel plate is horizontally disposed with, and the edge of described cover plate is fixed on the upper flange of described keel plate.
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| CN 201210405821 CN102874615A (en) | 2012-10-22 | 2012-10-22 | Dust suppression and fall system used in process of conveying high-dust material by belt type conveyor |
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| CN 201210405821 CN102874615A (en) | 2012-10-22 | 2012-10-22 | Dust suppression and fall system used in process of conveying high-dust material by belt type conveyor |
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| CN103056141A (en) * | 2013-01-24 | 2013-04-24 | 四川吉兴达热能设备有限责任公司 | Dust settling device of belt conveyor for coal |
| CN105173622A (en) * | 2015-09-14 | 2015-12-23 | 中南大学 | Dedusting method for conveyor belt of concentrating mill and device thereof |
| CN105346985A (en) * | 2015-12-08 | 2016-02-24 | 国投钦州发电有限公司 | Micron-grade dry mist dust suppression device for belt conveyor |
| CN105752647A (en) * | 2016-04-01 | 2016-07-13 | 大唐宝鸡热电厂 | Micron-scale dry mist dust suppression device |
| CN105921481A (en) * | 2016-05-18 | 2016-09-07 | 神华集团有限责任公司 | Vibration sieve dust settling device and vibration sieve dust removal system |
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| CN103056141A (en) * | 2013-01-24 | 2013-04-24 | 四川吉兴达热能设备有限责任公司 | Dust settling device of belt conveyor for coal |
| CN105173622A (en) * | 2015-09-14 | 2015-12-23 | 中南大学 | Dedusting method for conveyor belt of concentrating mill and device thereof |
| CN105346985B (en) * | 2015-12-08 | 2018-06-08 | 国投钦州发电有限公司 | Belt feeder micron-sized dry fog dust inhibitor |
| CN105346985A (en) * | 2015-12-08 | 2016-02-24 | 国投钦州发电有限公司 | Micron-grade dry mist dust suppression device for belt conveyor |
| CN105752647A (en) * | 2016-04-01 | 2016-07-13 | 大唐宝鸡热电厂 | Micron-scale dry mist dust suppression device |
| CN105921481A (en) * | 2016-05-18 | 2016-09-07 | 神华集团有限责任公司 | Vibration sieve dust settling device and vibration sieve dust removal system |
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Application publication date: 20130116 |