CN111228936A - Automatic spraying dust removal method for realizing dust in stock yard - Google Patents
Automatic spraying dust removal method for realizing dust in stock yard Download PDFInfo
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- CN111228936A CN111228936A CN202010164936.3A CN202010164936A CN111228936A CN 111228936 A CN111228936 A CN 111228936A CN 202010164936 A CN202010164936 A CN 202010164936A CN 111228936 A CN111228936 A CN 111228936A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D47/06—Spray cleaning
Abstract
The invention relates to a method for realizing automatic spraying and dust removal of dust in a stock ground, which comprises the following steps: s1, introducing a fully-closed aggregate storage yard into the mixing station, wherein the whole load-bearing framework of the storage yard is made of a steel structure, and is packaged by taking a color steel plate as an outer package; s2, when aggregate batching is carried out at a batching station, the aggregate is alternately unloaded according to the sequence of first sand, second fine stone and second coarse stone, then first sand, second coarse stone, second fine stone and final sand; s3, after the discharging is finished, the atomizing pipeline is started, water in the bottom circulating water tank is lifted to the main spraying water pipe at the top through the water pump, the water is sprayed into the stock yard through the nozzle, uniform water mist is formed among the stock yards, and the washing water flows into the bottom water tank through the ash bucket to be recycled. The dust removal method provided by the invention realizes low-dust unloading and high-efficiency dust removal of powder through cross unloading and high-pressure spraying.
Description
Technical Field
The invention belongs to the technical field of dust removal, and particularly relates to an automatic spraying dust removal method for dust in a stock yard.
Background art with the progress of science and technology, various technologies of asphalt stirring equipment tend to be mature, and the structures of all assemblies of the equipment are basically shaped. Research on asphalt mixing equipment has changed from how to meet the use performance of the equipment to meet the index requirements of society on energy conservation and environmental protection, which provides a new challenge for the performance of the asphalt mixing equipment, and the asphalt mixing equipment can generate a large amount of dust in the working process, which brings serious pollution to the atmospheric environment and threatens the health of field workers and surrounding residents all the time. In recent years, China has increased punishment to every city in environmental protection supervision and inspection, asphalt mixing plant discharges and receives strict restriction, has proposed higher requirement to its pollution control and treatment.
The unorganized emission of the asphalt mixing equipment mainly comes from the dust emission in the cold aggregate conveying process, and comprises the processes of conveying materials to a cold aggregate bin and discharging materials, the feeding process of a feeding belt conveyor, the joint of the collecting belt conveyor and the process of conveying the materials to a drying roller.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides an automatic spraying and dust removing method for realizing dust in a stock yard by cross unloading and high-pressure spraying.
The purpose of the invention is realized as follows:
an automatic spraying and dedusting method for realizing dust in a stock ground comprises the following steps:
s1, introducing a fully-closed aggregate storage yard into the mixing station, wherein the whole load-bearing framework of the storage yard is made of a steel structure, and is packaged by taking a color steel plate as an outer package;
s2, when aggregate batching is carried out at a batching station, the aggregate is alternately unloaded according to the sequence of first sand, second fine stone and second coarse stone, then first sand, second coarse stone, second fine stone and final sand;
s3, after the discharging is finished, the atomizing pipeline is started, water in the bottom circulating water tank is lifted to the main spraying water pipe at the top through the water pump, the water is sprayed into the stock yard through the nozzle, uniform water mist is formed among the stock yards, and the washing water flows into the bottom water tank through the ash bucket to be recycled.
Furthermore, the outlet end of the atomization pipeline is arranged on the nozzle, the inlet end of the atomization pipeline is connected with the water tank through a water pump, the water pump is connected with a variable frequency controller, and at least one atomization pipeline is arranged.
Furthermore, the nozzles are solid conical spray nozzles with the spray angle of 50-67 degrees, and 4-6 nozzles are arranged on each atomization pipeline.
Further, the pressure of the water pump is 0.5-1MPa, and the flow rate of the water pump is 2-4m3/h。
Further, in S2, the coarse weighing door of the storage bin is opened, aggregate falls into the weighing hopper and starts to be metered, when the weight of the aggregate is close to a fine weighing value, the coarse weighing door and the fine weighing door are closed to work, after weighing and metering are completed, the sand metering hopper door is opened first, sand is discharged 1/3 and is closed, the fine stone metering hopper door is opened again, fine stone is discharged 1/2 and is opened again, the coarse stone metering hopper door is opened again, coarse stone is discharged 1/2 and is closed again, the sand metering hopper door is closed when discharging 1/3 and is opened again, the coarse stone metering hopper door is opened again, the fine stone metering hopper door is closed again when discharging 1/2 and is opened again, the sand metering hopper door is closed when discharging 1/2 and is opened finally, the sand metering hopper door is opened when discharging 1/3, and at the aggregate is completely discharged.
Furthermore, the nozzle comprises a gland, a rotational flow chip and a nozzle, one end of the rotational flow chip is connected with the lower end of the gland, and the other end of the rotational flow chip is connected with the nozzle.
Furthermore, an electromagnetic valve is arranged on the atomization pipeline, and the nozzle is arranged at the position corresponding to the feed inlet of the storage bin.
Further, the atomization angle α of the atomization nozzle satisfies:
α=2arctan（y/x），
where x denotes a nozzle hole to polar row height (mm) and y denotes a spray radius (mm).
Further, the settling amount of the fog drops sprayed out by the atomizing nozzle to the dust meets the following requirements:
M=UηCAqs/V，
wherein M represents the amount of settling of the dust per unit time in a unit length range, U represents the relative velocity (M/s) of mist droplets and dust particles, η represents the dust capture efficiency (%) of individual droplets, C represents the dust mass concentration (mol/ml), and A represents the area (M/ml) of the capture zone2) And q represents the water content of the space volume (ml/m)3) And S represents a droplet cross-sectional area (m)2) And V represents the droplet volume (m)3）。
Further, the corresponding dust remover is established to the entrance point of feed bin, the entry end of dust remover passes through air pipe and connects the suction hood, the exit end of dust remover passes through the fan and connects the motor, the chimney is connected to the exit end of fan.
Further, the suction hood is located the feed bin just the upper end, apart from 20-24m department of feed bin, the baffle is established to the trilateral department in left side, rear side and the right side of the cover mouth of suction hood, the baffle extends to on the feed bin, the suction hood is toper square-mouth structure.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides an automatic spray dust removal method for dust in a stock yard, which is characterized in that high-speed fine water mist particles sprayed by a high-pressure nozzle are sprayed to a dust generation point, the water mist particles and the dust particles collide with each other, are adsorbed and wrapped with each other, are bonded and agglomerated to increase, and are settled under the action of self gravity to reduce the concentration of the dust in the air, and small droplets suspended in the air are quickly settled under the combined action of multiple mechanisms such as inertial collision, interception, self gravity, electrostatic force action, infiltration, agglomeration, diffusion and the like.
2. According to the automatic spraying dust removal method for the dust in the stock ground, provided by the invention, the aggregate is alternately unloaded by firstly carrying out sand, then carrying out fine stone, then carrying out coarse stone, then carrying out fine stone and finally carrying out sand, so that the rapid abrasion of the aggregate to the hopper can be avoided, and meanwhile, the reserved part of the sand is finally unloaded, so that the dust in the stone can be covered.
3. The invention provides a method for realizing automatic spraying and dust removal of dust in a stock yard, wherein a spraying water device is arranged in the stock yard to play a role in dust removal, so that the dust generated by a cold material conveying system is not discharged into the atmospheric environment, the noise pollution of equipment operation is reduced, high-speed fine water mist droplets sprayed by a high-pressure nozzle are quickly adhered to floating dust particles in a factory building, the dust particles are quickly settled, and the dust escape generated in the feeding process is inhibited.
Drawings
FIG. 1 is a flow chart of an automatic spraying dedusting method for stock yard dust.
FIG. 2 is a schematic diagram of a spray pipeline for realizing the automatic spray dedusting method of the dust in the stock yard.
FIG. 3 is a schematic view of a nozzle for implementing the automatic spray dedusting method of the dust in the stock yard.
In the figure: 1. an atomization conduit; 2. a nozzle; 3. an electromagnetic valve; 4. a water pump; 5. a variable frequency controller; 6. a water tank; 21. a gland; 22. a rotational flow chip; 23. and (4) a nozzle.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
With reference to fig. 1, a method for realizing automatic spraying and dust removal of dust in a stock ground comprises the following steps:
s1, introducing a fully-closed aggregate storage yard into the mixing station, wherein the whole load-bearing framework of the storage yard is made of a steel structure, and is packaged by taking a color steel plate as an outer package, a non-load-bearing wall body can be built by hollow bricks, so that the batching station and the conveying and feeding system are wholly closed, and an atomization pipeline 1 is erected at the upper part of the storage yard;
s2, when aggregate batching is carried out at a batching station, the aggregate is alternately unloaded according to the sequence of first sand, second fine stone, second coarse stone, then first sand, second coarse stone, second fine stone and final sand, specifically, a coarse weighing door of a storage bin is opened, the aggregate falls into a weighing hopper and starts to be metered, when the weight of the aggregate is close to a fine weighing value, the coarse weighing door and the fine weighing door are closed, after the weighing and metering are completed, a sand metering hopper door is opened firstly, sand unloading 1/3 is closed, then a fine stone metering hopper door is opened, fine stone unloading 1/2 is closed, then the coarse stone metering hopper door is opened, coarse stone unloading 1/2 is closed, the sand metering hopper door is opened again, unloading 1/3 is closed, then the coarse stone metering hopper door is opened, unloading 1/2 is closed, then the fine stone metering hopper door is opened, unloading 1/2 is closed, finally the sand metering hopper door is opened, and unloading 1/3 is closed, at the moment, the aggregate is completely unloaded;
s3, after the discharging is finished, the atomizing pipeline 1 is started, water in the bottom circulating water tank 6 is lifted to the main spraying water pipe at the top through the water pump 4, the water is sprayed into the stock yard through the nozzle 2, uniform water mist is formed among the stock yards, and the washing water flows into the bottom water tank 6 through the ash bucket to be recycled.
In the water feeding mode, a pressurizing water pump 4 is added to increase the pressure of water entering a pipeline, so that the effect of pressing dust can be achieved, atomized water is formed, on one hand, the water pressure can be further increased, and meanwhile, the effect of cleaning powder of a stirring shaft can be achieved, the nozzle 2 is over against the stirring shaft, the effect of pressing dust and cleaning powder and concrete slurry on a main shaft can be achieved, the structure of the nozzle 2 of the water distribution pipe is improved, the cross section of the nozzle 2 is designed to be in a runway shape, the nozzles 2 are arranged at equal intervals in a staggered mode of 90 degrees, as the cross section of the nozzle 2 from a water inlet end to a water outlet end is in a contraction shape, the water discharging pressure is increased under the condition of equal flow, a water curtain is formed during water discharging, and the effect of.
Example 2
Combine fig. 2 and fig. 3, the exit end of atomizing pipeline 1 is located to nozzle 2, the water tank 6 is connected through water pump 4 in atomizing pipeline 1's entry end, frequency conversion controller 5 is connected to water pump 4, atomizing pipeline 1 establishes at least one, nozzle 2 adopts the solid tapered spray nozzle 2 that spray angle is 50-67, establish nozzle 2 on every atomizing pipeline 1 and establish 4-6, the pressure of water pump 4 is 0.5-1MPa, the flow of water pump 4 is 2-4m3/h。
Spray mainly by nozzle 2, water pump 4, water pump variable frequency controller 5, water tank 6 and constitute, the main function is the atomizing and the washing utmost point row that realize water, promote the shower water at feed bin top to be responsible for through the water pump with bottom circulation tank's water, spray the feed bin by the nozzle in, form even water smoke between the feed bin, the sparge water circulates the use through ash bucket inflow bottom water tank 6.
The atomizing pipeline 1 is provided with a switch of an electromagnetic valve 3, the switch of the electromagnetic valve 3 is in a normally closed state, the opening and closing action of the electromagnetic valve 3 is connected with the opening and closing action of a dust hood air door, when the loader unloads in a cold material bin, the electromagnetic valve 3 is opened, a water path is connected, the high-pressure atomizing nozzle 2 starts to spray atomized small liquid drops, a fog curtain is formed in front of a feeding port of the bin, the fog curtain can block dust flying out of the bin, and the dust is prevented from diffusing in the atmosphere.
Example 3
On embodiment 2's basis, the corresponding dust remover is established to the entrance point of feed bin, the entry end of dust remover passes through air pipe and connects the suction hood, the exit end of dust remover passes through the fan and connects the motor, the chimney is connected to the exit end of fan, the suction hood is located the feed bin just upper end, apart from feed bin 20-24m department, the baffle is established in left side, rear side and the trilateral department in right side of the cover mouth of suction hood, the baffle extends to on the feed bin, the suction hood is toper square-mouth structure.
The top suction type dust hood is arranged at a position 22mm away from the storage bin right above the storage bin, the baffle plates are arranged on the left side, the rear side and the right side of the opening of each dust hood, the baffle plates extend to the storage bin, the suction range of the dust hood can be reduced by the baffle plates arranged on the openings of the dust hood, the dust collecting capacity of the dust hood is enhanced, the dust collecting efficiency is improved, and the possibility that dust escapes to the outside is reduced. The top suction hood has a conical square mask shape, and each suction hood is arranged between each suction hood and the ventilation pipeline connected with the suction hood.
Example 4
The atomizing angle α of the atomizing nozzles meets the requirements that α =2arctan (y/x), wherein x represents the height (mm) from the nozzle hole to the polar row, y represents the spraying radius (mm), the coverage area of the spraying amount can be known through the atomizing angles of the two atomizing nozzles, and the mounting positions of the atomizing nozzles are reasonably arranged to enable the spraying area to completely cover the polar row.
The settling amount of the fog drops sprayed out of the atomizing nozzle on the dust meets M = U η CAqs/V, wherein M represents the settling amount of the dust in unit length range in unit time, U represents the relative speed (M/s) of the fog drops and dust particles, η represents the dust collection efficiency (%) of single liquid drops, C represents the mass concentration (mol/ml) of the dust, A represents the area (M/ml) of a collection area2) And q represents the water content of the space volume (ml/m)3) And S represents a droplet cross-sectional area (m)2) And V represents the droplet volume (m)3）。
The water mist dust fall generally adopts a high-pressure atomizing nozzle, the dust fall effect of the atomizing nozzle is determined by the movement speed of mist drops, the particle size of the mist drops, the diffusion degree of the mist drops and the uniformity of particle distribution, the movement speed of the mist drops and the space density of the mist drops are improved, and the dust fall method mainly based on the collision principle has a good effect.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and substitutions made within the scope of the present invention should be included.
Claims (7)
1. An automatic spraying dust removal method for realizing dust in a stock ground is characterized by comprising the following steps: the method comprises the following steps:
s1, introducing a fully-closed aggregate storage yard into the mixing station, wherein the whole load-bearing framework of the storage yard is made of a steel structure, and is packaged by taking a color steel plate as an outer package, a non-load-bearing wall body can be built by hollow bricks, so that the batching station and the conveying and feeding system are wholly closed, and an atomization pipeline (1) is erected at the upper part of the storage yard;
s2, when aggregate batching is carried out at a batching station, the aggregate is alternately unloaded according to the sequence of first sand, second fine stone and second coarse stone, then first sand, second coarse stone, second fine stone and final sand;
s3, after unloading, starting the atomizing pipeline (1), lifting water in the bottom circulating water tank (6) to a main spraying water pipe at the top through a water pump (4), spraying the water into a stock yard through a nozzle (2), forming uniform water mist in the stock yard, and enabling the washing water to flow into the bottom water tank (6) through an ash bucket for recycling.
2. The automatic spraying and dedusting method for the dust in the stock ground according to claim 1, characterized in that: the outlet end of atomizing pipeline (1) is located in nozzle (2), the entry end of atomizing pipeline (1) passes through water pump (4) and connects water tank (6), frequency conversion controller (5) is connected in water pump (4), at least one is established in atomizing pipeline (1).
3. The automatic spraying and dedusting method for the dust in the stock ground according to claim 2 is characterized in that: the spray nozzle (2) adopts a solid conical spray nozzle (2) with a spray angle of 50-67 degrees, and 4-6 spray nozzles (2) are arranged on each atomization pipeline (1).
4. The automatic spraying and dedusting method for the dust in the stock ground according to claim 2 is characterized in that: the pressure of the water pump (4) is 0.5-1MPa, and the flow of the water pump (4) is 2-4m3/h。
5. The automatic spraying and dedusting method for the dust in the stock ground according to claim 1, characterized in that: s2, opening a coarse weighing door of the storage bin, enabling aggregate to fall into a metering hopper and start metering, closing the coarse weighing door and the fine weighing door when the weight of the aggregate is close to a fine weighing value, opening the sand metering hopper door firstly after weighing and metering are completed, closing the sand unloading 1/3, opening the fine stone metering hopper door again, closing the fine stone unloading 1/2, opening the coarse stone metering hopper door again, closing the coarse stone unloading 1/2, opening the sand metering hopper door again, closing the unloading 1/3, opening the coarse stone metering hopper door again, closing the unloading 1/2, opening the fine stone metering hopper door again, closing the unloading 1/2, finally opening the sand metering hopper door, closing the unloading 1/3 and finishing unloading all aggregates.
6. The automatic spray dedusting method for the dust in the stock ground according to any one of claims 1 to 3, characterized in that: the nozzle (2) comprises a gland (21), a swirl chip (22) and a nozzle (23), one end of the swirl chip (22) is connected with the lower end of the gland (21), and the other end of the swirl chip (22) is connected with the nozzle (23).
7. The automatic spraying and dedusting method for the dust in the stock ground according to claim 1, characterized in that: establish solenoid valve (3) on atomizing pipeline (1), nozzle (2) correspond the feed inlet department setting of feed bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010164936.3A CN111228936A (en) | 2020-03-11 | 2020-03-11 | Automatic spraying dust removal method for realizing dust in stock yard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010164936.3A CN111228936A (en) | 2020-03-11 | 2020-03-11 | Automatic spraying dust removal method for realizing dust in stock yard |
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| CN111228936A true CN111228936A (en) | 2020-06-05 |
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| CN202010164936.3A Pending CN111228936A (en) | 2020-03-11 | 2020-03-11 | Automatic spraying dust removal method for realizing dust in stock yard |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906904A (en) * | 2015-05-22 | 2015-09-16 | 国家电网公司 | Artificial sandstone aggregate production system and dust suppression and removing method thereof |
| CN108519313A (en) * | 2018-05-15 | 2018-09-11 | 高阳 | A kind of stock ground automatic spray device for reducing dust |
| CN208032170U (en) * | 2018-01-25 | 2018-11-02 | 南京南淮环保机械设备有限公司 | A kind of spray system for feed bin dedusting |
| KR102039917B1 (en) * | 2018-08-01 | 2019-11-04 | 윤방남 | Dust reduction pretreatment device and pretreatment system using the same |
-
2020
- 2020-03-11 CN CN202010164936.3A patent/CN111228936A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906904A (en) * | 2015-05-22 | 2015-09-16 | 国家电网公司 | Artificial sandstone aggregate production system and dust suppression and removing method thereof |
| CN208032170U (en) * | 2018-01-25 | 2018-11-02 | 南京南淮环保机械设备有限公司 | A kind of spray system for feed bin dedusting |
| CN108519313A (en) * | 2018-05-15 | 2018-09-11 | 高阳 | A kind of stock ground automatic spray device for reducing dust |
| KR102039917B1 (en) * | 2018-08-01 | 2019-11-04 | 윤방남 | Dust reduction pretreatment device and pretreatment system using the same |
Non-Patent Citations (2)
| Title |
|---|
| 倪小青等: "混凝土搅拌站除尘系统设计应用探讨", 《建筑机械》 * |
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