JP3653707B2 - Dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collector.
[0002]
[Prior art]
As a dust collector capable of collecting dust generated during tunnel excavation work, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2001-79445. This dust collector applies a voltage to the discharge electrode, charges the dust by corona discharge generated between the discharge electrode and the charging part electrode, forms an electric field, and forms an electric field, and the charged dust is subjected to Coulomb force. A dust collection unit that collects the dust on the dust collection electrode plate, and uses a dust collection unit that is placed on the cargo bed of the vehicle, with a charging unit on the upstream side and a dust collection unit on the downstream side. It is a dust collector. And when the air containing dust passes through in this electric dust collector, the dust which was collected and cleaned is discharged.
[0003]
[Problems to be solved by the invention]
However, since the electrostatic precipitator cannot completely remove the dust in the air, the charged dust that could not be collected in the precipitator could adhere to the wall surface inside the tunnel or leak out of the tunnel. .
[0004]
Then, the subject of this invention is providing the dust collector which improves the collection effect of the dust in the air more.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is a dust collector 10 including a dust collection unit 1 that collects dust in the air as shown in FIG. 1, for example. 1 has a water sprinkling unit 4 for inflowing air that has passed through 1 and sprinkling water by means of water sprinkling means 5. The water sprinkling means 5 includes a water guide pipe 42 provided in the circumferential direction along the inner peripheral surface of the steel pipe 41, and A plurality of water spray nozzles 43 provided in the water guide pipe 42 so as to extend in the radial direction of the steel pipe 41 and spraying toward the inside of the steel pipe 41 in different directions, a stored water supply section 44, and the water supply section 44 And a pump P for feeding the water to the conduit pipe 42.
[0006]
According to invention of Claim 1, a water droplet adheres to the dust which passed the dust collection unit by sprinkling with the water sprinkling means of a water sprinkling unit, and dust falls with a water droplet with the weight. Thereby, it is possible to further improve the dust collecting effect as compared with the conventional dust collector only by providing a relatively simple mechanism for spraying water.
[0007]
Invention of Claim 2 is a dust collector of Claim 1, Comprising: For example, as shown in FIG. 2, the said dust collection unit 1 is charged with the dust in the air, and is collected by the electrode plate 13b. It is characterized by having constituted so.
[0008]
According to the invention described in claim 2, since the dust collecting unit is configured to be charged with dust in the air and collected by the electrode plate, the water droplets adhere to the charged dust, so that the charged dust is reduced. It can be discharged. Therefore, dust can be prevented from adhering to the inner wall of the tunnel.
[0009]
The invention according to claim 3 is the dust collector 10 according to claim 2, for example, as shown in FIG. 2, comprising the cleaning means 6 for cleaning the electrode plate 13 b, and the water supply section 44 is provided with the watering means. 5 and the cleaning means 6.
[0010]
According to the third aspect of the present invention, the dust collector includes the cleaning means, and includes the water supply unit shared by the watering means and the cleaning means, so there is no need to provide a separate water supply facility, and the construction cost increases. Can be suppressed.
[0011]
The invention described in claim 4 is, for example, as shown in FIG. 2, a dust collector 10 including a dust collection unit 1 that collects dust in the air, and the dust collection unit 1 is connected to dust in the air. Is charged and collected by the electrode plate 13b, and the water spraying unit 4 that flows in the air that has passed through the dust collecting unit 1 and sprays the water by the water spraying means 5, and the cleaning means 6 that cleans the electrode plate 13b. And a water supply unit 44 shared by the watering means 5 and the cleaning means 6 so that the watering means 5 sprays water after the electrode plate 13b is cleaned by the cleaning means 6. It is characterized by comprising.
[0012]
According to invention of Claim 4, since the water after washing | cleaning an electrode plate with a washing | cleaning means is sprinkled by the watering means, the water for watering means and water supply equipment are not required. As a result, the dust collector can be reduced in size and the construction cost can be prevented from rising.
[0013]
The invention according to claim 5 is characterized in that, in the dust collector 10 according to any one of claims 1 to 4, the watering means is configured such that water is sprayed in a mist form.
[0014]
According to the invention described in claim 5, by spraying water in a mist form, water can be sprayed over a wide range with a small amount of water, and the dust collecting effect can be further improved.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a dust collector according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, an electric dust collector will be described as an example.
As shown in FIG. 1, a dust collector 10 is placed on a loading platform 9a of a vehicle 9 such as a truck, and a dust collection unit 1 that charges and collects dust in the air that has flowed into the interior, and this dust collection unit. A fan unit 2 that allows dust to flow into the dust unit 1, a discharge unit 3 that discharges the air that flows in the fan unit 2, and dust that is provided at the tip of the discharge unit 3 and discharged from the discharge unit 3 And the like.
The dust collection unit 1 and the fan unit 2 are connected by a connection duct 71, and the fan unit 2 and the discharge unit 3 are connected by a connection duct 72. Moreover, as shown in FIG. 1, the dust collection unit 1, the fan unit 2, and the discharge unit 3 are arrange | positioned toward the front sequentially from the back of the loading platform 9a. The dust collection unit 1 and the fan unit 2 are placed on a gantry 73 provided on the cargo bed 9a.
[0018]
The dust collection unit 1 is arranged with the air suction port 11 facing the rear of the vehicle 9, and as shown in FIG. 2, a voltage is applied to the discharge line 12a, and the discharge line 12a and the charging portion electrode plate 12b are An electric field is formed between the charging unit 12 that charges and charges the dust by corona discharge generated between the load electrode plate 13a and the dust collecting electrode plate 13b, and the charged dust is collected by the Coulomb force. And a dust collecting unit 13 that collects at 13b.
The charging unit 12 has a structure in which a plurality of charging unit electrode plates 12b are arranged in parallel at predetermined intervals, and a discharge wire 12a is disposed between the charging unit electrode plates 12b. In the dust collection portion 13, load electrode plates 13 a and dust collection electrode plates 13 b are alternately arranged in parallel at predetermined intervals. Further, a protective net 14 is provided on the air suction port side of the dust collection unit 1. An inlet damper 15 is provided on the upstream side of the charging unit 12, and an outlet damper 16 is provided on the downstream side of the dust collection unit 13. The inlet damper 15 and the outlet damper 16 are provided with cleaning nozzles 17 directed to the charging unit 12 and the dust collecting unit 13. Behind the cleaning nozzle 17, a water conduit 18 is connected to a water tank 44 as a water supply unit via a pump P. The cleaning means 6 is connected to the cleaning nozzle 17, the water conduit 18, the stored water tank 44, and the pump P. Is configured. The water tank 44 stores spring water pumped up from the ground near the tunnel T.
[0019]
The fan unit 2 is provided adjacent to the front side of the loading platform 9 a of the dust collection unit 1, and includes a fan 21 and a motor 22 that drives the fan 21 inside. The fan 21 allows air to flow from the dust collection unit 1 side and exhaust to the water spray unit 4 side.
The discharge unit 3 is disposed above the front side of the loading platform 9a of the fan unit 2, and is formed of a cylindrical steel pipe or the like. Further, the air discharge port 31 of the discharge unit 3 opens toward the front of the vehicle 9.
[0020]
The water sprinkling unit 4 is provided adjacent to the air discharge port 31 of the discharge unit 3, and collects the dust that could not be collected by the dust collection unit 1 by dropping with water spray. The water spray unit 4 is also supported by a support work (not shown) in the tunnel T. The watering unit 4 includes watering means 5, and the watering means 5 includes a water guide pipe 42, a watering nozzle 43, a stored water tank 44, and a pump P. As shown in FIG. 3, the water spray means 5 is provided with a water guide pipe 42 along the inner peripheral surface inside a steel pipe 41 having substantially the same diameter as the discharge unit 3, and the water guide pipe 42 has a predetermined interval. A plurality of watering nozzles 43 extending in the radial direction of the steel pipe 41 are attached. The water guide pipe 42 is connected to a water tank 44 serving as a water supply unit via a pump P. Here, the water tank 44 and the pump P share the same thing as the washing | cleaning means 6, and aim at simplification of water supply equipment. In addition, switching of the water supply to the water conduit 18 and the water conduit 42 is performed by a valve (not shown).
Moreover, the watering nozzle 43 is provided in four places, for example. In addition, water is sprayed in the form of a mist from the tip of the watering nozzle 43, and the four watering nozzles 43 spray water in four different directions, thereby collecting dust over the entire area of the steel pipe 41. Can be done.
[0021]
A high-voltage current generator 77 that generates a high-voltage current to be transmitted to the dust collection unit 1 and a control device 78 that controls the start and stop of the high-voltage current generator 77 are arranged on the front side of the loading platform 9a. Yes. At this time, the control device 78 is preferably arranged on the driver's seat side in terms of operability.
The connection duct 71 has a large opening on the dust collection unit 1 side, a small opening on the fan unit 2 side, and a cross-sectional area from the opening on the dust collection unit 1 side to the opening on the fan unit 2 side. It is composed of deformed ducts that gradually decrease. The connection duct 71 includes an inspection port 71a on the side surface. The connection duct 72 is formed of a duct in which the opening on the fan unit 2 side and the opening on the discharge unit 3 side have substantially the same cross-sectional area. Further, the connection duct 72 is inclined so that the opening on the discharge unit 3 side is higher than the opening on the fan unit 2 side.
[0022]
Next, the operation of the dust collector 10 will be described.
First, the dust collector 10 is placed on the loading platform 9a of the vehicle 9 and moved by self-propelled to near the site such as concrete spraying in the tunnel T. And the rear part side of the vehicle 9 is stopped toward the spot such as concrete spraying. Concrete blowing dust or dust from blasting is sucked into the dust collecting unit 1 from the air suction port 11 by driving the fan 21. At this time, large foreign matters such as dust are collected by the protective net 14. The dust passing through the protective mesh 14 is charged by being charged by corona discharge generated in the charging unit 12 and charged. The charged dust moves to the dust collecting unit 13 disposed on the downstream side of the charging unit 12 by the air flow. In the dust collection part 13, since an electric field is formed between the load electrode plate 13a and the dust collection electrode plate 13b, the charged dust is collected by the dust collection electrode plate 13b by Coulomb force. The air in which dust is collected in this way passes through the connection duct 71, the fan unit 2, and the connection duct 72 in this order, and reaches the air discharge port 31 of the discharge unit 3.
Here, the dust that has not been collected by the dust collection electrode plate 13 b jumps out of the air discharge port 31 by the air flow and is discharged into the adjacent watering unit 4. Here, by starting the pump P installed at the proximal end portion of the water conduit 42, water flows to the distal end portion of the water conduit 42, and mist water is sprinkled from the water nozzle 43. The sprayed mist-like water droplets adhere to the dust, whereby the dust that has not been collected by the dust collecting electrode plate 13b is collected.
[0023]
The operation of the dust collection unit 1, the fan unit 2, and the watering unit 4 for performing the above operation is performed by the control device 78. When the dust collection work is finished, water is ejected from the cleaning nozzle 17 as the cleaning means 6 to wash away the dust adhering to the dust collecting electrode plate 13b. Further, the dust collected in the watering unit 4 is directly discharged through a lower discharge port (not shown) along the inner wall.
[0024]
According to the dust collector 10 of the present embodiment, since the water sprinkling unit 4 is provided behind the dust collecting unit 1, water is sprinkled from the sprinkling nozzle 43 even if there is dust that the dust collecting unit 13 could not collect. As a result, water droplets adhere to the dust, and by its weight, the dust falls together with the water droplets. As a result, most of the dust passing through the dust collector 10 is collected by either the dust collection unit 1 or the water sprinkling unit 4, and the dust collection effect is further improved as compared with the conventional dust collector. Can do. Moreover, the dust collection effect can be further improved by providing a relatively simple mechanism that only sprinkles water.
[0025]
Moreover, since the watering nozzle 43 can spray water in a plurality of different directions, the watering range can be expanded more widely, and the dust collecting effect can be further improved. By spraying water in the form of a mist by the watering nozzle 43, water can be sprayed over a wide range with a small amount of water, and the dust collecting effect can be further improved.
Furthermore, when water is sprinkled in the watering unit 4, water droplets adhere to the charged dust, whereby the charged dust can be discharged, and the dust can be prevented from adhering to the inner wall of the tunnel.
In addition, since the dust collector 10 includes the cleaning nozzle 17 and the watering nozzle 43 and the cleaning nozzle 17 share the water tank 44 serving as a water supply unit, it may be simpler than a case where a water supply facility is provided separately. it can.
[0026]
The present invention is not limited to the above embodiment. For example, the dust collector 10 is not limited to an electric dust collector, and may be a dust collector using a filter. Moreover, the shape of the watering nozzle 43 is also arbitrary, and a switching mechanism that changes the spray pattern of water in accordance with the particle size of the dust contained in the air may be provided. In addition, it is sufficient to secure a certain amount of water by circulating and reusing water sprinkled by the sprinkling means 5 of the sprinkling unit 4, such as water supply work or water supply equipment for guiding water from the water source to the water tank 44. No increase in construction costs can be suppressed.
Further, by spraying the water after cleaning the dust collection electrode plate 13b and the like by the cleaning means 6 as the water spray means 5 of the water spray unit 4, a separate water supply facility is not required, and the dust collector 10 can be reduced in size and construction cost. Soaring can be suppressed.
[0027]
【The invention's effect】
According to the invention described in claim 1, by collecting water by means of the watering means of the watering unit, it is possible to collect dust as compared with a conventional dust collector having only a dust collecting unit by providing a simple mechanism for spraying water. The effect can be further improved.
[0028]
According to the second aspect of the present invention, the dust collecting unit is configured to be charged with dust in the air and collected by the electrode plate. It can be discharged. Therefore, dust can be prevented from adhering to the inner wall of the tunnel.
[0029]
According to the third aspect of the present invention, the dust collector includes the cleaning means, and includes the water supply unit shared by the watering means and the cleaning means, so there is no need to provide a separate water supply facility, and the construction cost increases. Can be suppressed.
[0030]
According to invention of Claim 4, since the water after washing | cleaning an electrode plate with a washing | cleaning means is sprinkled by the watering means, the water for watering means and water supply equipment are not required. As a result, the dust collector can be reduced in size and the construction cost can be prevented from rising.
[0031]
According to the invention described in claim 5, by spraying water in a mist form, water can be sprayed over a wide range with a small amount of water, and the dust collecting effect can be further improved.
[Brief description of the drawings]
FIG. 1 is a side view for explaining a dust collector in an embodiment of the present invention.
FIG. 2 is a perspective view with a part cut away for explaining the dust collecting unit in the embodiment.
FIG. 3 is a cross-sectional view for explaining the watering unit in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dust collection unit 13b Electrode plate 4 Water sprinkling unit 44 Water supply part 5 Water sprinkling means 6 Cleaning means

Claims (5)

A dust collector equipped with a dust collecting unit that collects dust in the air,
Having a watering unit that flows in the air that has passed through the dust collecting unit and sprays water by means of watering;
The watering means is
A water conduit provided in the circumferential direction along the inner peripheral surface of the steel pipe;
A plurality of watering nozzles that are provided in the water conduit so as to extend in the radial direction of the steel pipe and spray water toward the inside of the steel pipe in different directions;
A stored water supply unit;
A pump for feeding water from the water supply section to the water conduit;
A dust collector characterized by comprising:   2. The dust collector according to claim 1, wherein the dust collecting unit is configured to be charged with dust in the air and collected by an electrode plate. A cleaning means for cleaning the electrode plate;
The dust collector according to claim 2, wherein the water supply unit is shared by the watering means and the cleaning means. A dust collector equipped with a dust collecting unit that collects dust in the air,
The dust collection unit is configured to charge dust in the air and collect it with an electrode plate,
A watering unit that flows in the air that has passed through the dust collecting unit and sprays water by watering means;
Cleaning means for cleaning the electrode plate;
A water supply unit shared by the watering means and the cleaning means,
The dust collector is characterized in that the watering means is configured to spray water after the electrode plate is washed by the washing means.   The dust collector according to any one of claims 1 to 4, wherein the watering means is configured such that water is sprayed in a mist form.

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