JP3342368B2 - Electric dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric dust collector installed in a high-humidity atmosphere such as in a tunnel of an automobile road.

[0002]

2. Description of the Related Art In recent years, for example, a method using an electric dust collector has been used as a method for purifying contaminated air in a tunnel on an automobile road. In this method using an electric dust collector, a detour tunnel is formed in the tunnel, an electric dust collector is installed, the contaminated air extracted from the tunnel into the tunnel is cleaned by the electric dust collector, and the air is sent again into the tunnel. It purifies the polluted air.

[0003] By installing an electric dust collector in a detour tunnel in a tunnel as described above, it is possible to purify contaminated air in the tunnel. However, in the electric dust collector, dust adheres to the electrode unit due to the dust collection process.
For example, it is necessary to clean about once a day.

When the air in the place where the electric precipitator is installed is dry, it can be cleaned by blowing compressed air to the electrode unit. However, in places with high humidity such as in tunnels, dust adheres strongly to the surfaces of the electrodes and insulators in the electrode unit due to the moisture. Can not.

[0005] In such a case, a water washing method is used in which pressurized water is sprayed on the electrode unit instead of air to remove dust. When the above water washing method is used, a plurality of washing nozzles are provided on the back side of the entrance door and the exit door, and the washing is performed by spraying water from the washing nozzle to the electrode unit about once a day. Are collected by a drain pan provided at the bottom of the main body and discharged outside the machine.

Since the drain pan collects the sewage from the electrode unit and discharges the sewage to the outside of the apparatus, there is a problem that even after the sewage is discharged out of the apparatus, a part of the dust stays in the drain pan and accumulates. There is. For this reason, conventionally,
A drain pan washing nozzle is provided above the drain pan, and water is sprayed from the washing nozzle to wash the drain pan.

[0007]

In the conventional electrostatic precipitator using the water cleaning method as described above, a drain pan cleaning pipe and a cleaning nozzle are provided separately from the electrode unit cleaning nozzle to clean the drain pan. Therefore, there is a problem that the piping configuration becomes complicated and the cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an electric precipitator which does not require a dedicated pipe for washing a drain pan, can simplify the pipe configuration, and can reduce the cost. The purpose is to provide.

[0009]

According to the present invention, there is provided an electronic device comprising:
The air dust collector includes a dust collection unit main body of the electric dust collector and the dust collector.
An entrance door provided on a front surface of the dust unit main body;
An exit door provided on a rear surface of the unit body;
Electrode unit provided in the air flow path in the knit body
And the entrance door on the air inflow side of the electrode unit.
On the back side and the back side of the exit door on the air outflow side, respectively
Cleaning pipes provided in a plurality of stages,
A plurality of electrode unit cleaning nozzles, and the electrode
And a drain pan installed below the unit.
Bottom of the cleaning pipes provided at the entry and exit doors
Horizontally set the installation angle of the cleaning nozzle provided in the cleaning pipe of the stage
It is characterized in that the drain pan is set to a lower position and is also used for washing the drain pan.

An electric dust collector according to a second aspect of the present invention is an electric dust collector.
A dust collection unit body of the dust collector,
After the entrance door provided on the front and the main body of the dust collection unit
An exit door provided on the surface, and an empty space inside the dust collection unit main body.
An electrode unit provided in the air flow path;
The back side of the entrance door and the air outflow side
Washing steps provided on the back surface of the exit door
Cleaning pipes and a plurality of power
The electrode unit cleaning nozzle and the electrode unit
A drain pan to be placed, the entrance door and the exit door
The drain pipe cleaning nozzle is provided separately from the electrode unit cleaning nozzle in the lowermost cleaning pipe of the cleaning pipes provided in the above .

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a plan view showing a schematic configuration of an electric precipitator according to a first embodiment of the present invention, and FIG. 2 is a sectional side view of the same.

1 and 2, reference numeral 1 denotes a main body of a dust collecting unit of an electric precipitator. An entrance door 2 is provided on a front surface of the main body 1, and an exit door 3 is provided on a rear surface. Further, in the air flow path inside the main body 1, for example, electrode units 4a and 4b are provided in two stages, upper and lower. These electrode units 4a, 4b
Although not shown, a large number of discharge electrodes, dust collection electrodes, and the like are provided. The discharge electrode is supplied with a DC high voltage via the insulator 5. On the other hand, the dust collection electrode is grounded.

The entrance door 2 and the exit door 3 are provided with a damper 6 for controlling the flow of contaminated air therein, and a plurality of washing nozzles for washing the electrode units 4a, 4b with water on the back side. 7, 8 are provided. Further, a washing nozzle 9 for washing the electrode units 4a and 4b is provided also on the ceiling portion of the main body 1. The cleaning nozzles 7, 8, 9 are connected to a cleaning pipe 10, and the cleaning pipe 1
A solenoid valve is provided in the middle of zero. The solenoid valve is turned on / off by a control command from a control device. When the solenoid valve is turned on, water is sprayed from the washing nozzles 7, 8, 9 to wash the electrode units 4a, 4b. . Further, the bottom of the main body 1 is provided with a predetermined inclination so that the drain pan 11 has a predetermined inclination for discharging the washed water, for example, the entrance door 2 side is high and the exit door 3 side is low. The washing water collected by the drain pan 11 is discharged to the outside of the machine from a drain port 12 provided on the back side of the main body 1, that is, on the exit door 3 side.

The installation angle of a part of the cleaning nozzles 7 and 8 provided in the entrance door 2 and the exit door 3, for example, the cleaning nozzles 7a and 8a installed at the lowermost stage as shown in FIG. The cleaning nozzles 7a and 8a are configured to clean a part of the electrode unit 4b and the drain pan 11. That is, a part of the cleaning nozzles 7 and 8 is also used for cleaning the electrode unit 4 b and the drain pan 11.

In the above configuration, when normal dust collection processing is performed, dust-containing air flowing into the main body 1 from the entrance door 2 is sent to the electrode units 4a and 4b. Each of the electrode units 4a and 4b is provided with a charging unit on the entrance side, and thereafter provided with a dust collecting unit. First, in the charging section, charging processing is performed on the dust particles by ion corona discharge, and the charged dust particles are collected by the dust collecting electrode of the dust collecting section. Then, the electrode units 4a,
4b passes through the damper 6 of the exit door 3.
Is sent out to the outside.

By the above-mentioned dust collection processing, the electrode unit 4
Since dust adheres to the electrode portions a and 4b, the insulator 5 and the like, the electrode units 4a and 4b are cleaned at predetermined intervals, for example, about once a day by a worker or automatically. That is, at the time of cleaning, the cleaning pipe 10
Is opened by a command from the control device, and water is sprayed from the cleaning nozzles 7, 8, 9 to clean the electrode units 4a, 4b. The water contaminated by this washing is
It is collected by the drain pan 11 and discharged out of the machine through the drain port 12.

At the time of the above-mentioned cleaning, the cleaning nozzle 7 provided at the lowermost stage of the cleaning nozzles 7 and 8 is used.
a, 8a are a part of the electrode unit 4b and the drain pan 11;
Wash. Therefore, even if the drain pan 11 becomes dirty when the cleaning water is discharged out of the machine, the cleaning nozzles 7a and 8b
And the accumulation of dust is prevented.

According to the first embodiment, there is no need to provide a dedicated pipe for the drain pan and a washing nozzle, so that the pipe configuration can be simplified and the cost can be reduced. (Second Embodiment) Next, a second embodiment of the present invention will be described.

FIG. 3 is a side sectional view showing a schematic configuration of an electric precipitator according to a second embodiment of the present invention, and FIG. 4 is a sectional view taken along line AA of FIG. In the second embodiment, as shown in FIGS. 3 and 4, a plurality of drain pan cleaning nozzles 21 are provided at the bottom of the cleaning pipe 10 provided on the entrance door 2 and the exit door 3 for cleaning the electrode unit. It is provided separately from the nozzles 7 and 8, and the other configuration is the same as that of the first embodiment. Therefore, detailed description is omitted.

In the second embodiment, a part of the electrode unit cleaning nozzles 7 and 8 is not used for drain pan cleaning, and a dedicated cleaning nozzle 21 for cleaning the drain pan 11 is used.
Is provided, the drain pan 11 can be more reliably cleaned. In this case, since the cleaning pipe connecting the drain pan cleaning nozzle 21 uses the lowest pipe of the cleaning pipe 10 for cleaning the electrode unit, it is not necessary to provide a dedicated pipe for cleaning the drain pan 11. And increase in cost can be suppressed.

[0021]

As described above in detail, according to the present invention, there is provided an electric precipitator in which an electrode unit cleaning nozzle is provided on an air inflow side and an outflow side of an electrode unit, and a drain pan is provided below the electrode unit. Since the cleaning nozzle provided at the lowermost stage among the cleaning nozzles of the electrode unit is also used for the drain pan cleaning, a dedicated pipe and a cleaning nozzle for cleaning the drain pan are not required, and the piping configuration is reduced. This can be simplified and cost can be reduced. In addition, since the present invention has a configuration in which a drain pan cleaning nozzle is provided separately from the electrode unit cleaning nozzle in the lowermost cleaning pipe provided with the electrode unit cleaning nozzle, the drain pan can be more reliably cleaned. At the same time, a dedicated piping for cleaning the drain pan is not required, and the piping configuration can be simplified to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of an electric precipitator according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the electric precipitator in the embodiment.

FIG. 3 is a side sectional view of an electric precipitator according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust collection unit main body 2 Entrance door 3 Exit door 4a, 4b Electrode unit 5 Insulator 6 Damper 7, 8, 9 Cleaning nozzle 10 Cleaning pipe 11 Drain pan 12 Drain port 21 Drain pan cleaning nozzle

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasutoshi Ueda 2-1-1 Shinhama, Arai-machi, Takasago-shi, Hyogo In-house Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (56) References JP-A 1-266867 (JP, A) JP-A-63-248460 (JP, A) JP-A-9-122426 (JP, A) JP-A-7-256144 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B03C 3 / 00-3/88

Claims (2)

(57) [Claims] A dust collecting unit main body of the electric dust collector;
An entrance door provided on a front surface of the dust collection unit main body;
An exit door provided on a rear surface of the dust unit main body;
Electrode unit provided in the air flow path inside the unit body
And the entrance door on the air inflow side of the electrode unit.
On the back side and the back side of the exit door on the air outflow side, respectively
Cleaning pipes provided in a plurality of stages,
A plurality of electrode unit cleaning nozzles, and the electrode
A drain pan installed below the unit, and a cleaning pipe provided at the entrance door and the exit door.
Change the installation angle of the washing nozzle provided in the lower washing pipe to water.
An electric dust collector, wherein the dust collector is set to be lower than flat and is also used for cleaning the drain pan. 2. A dust collecting unit main body of an electric dust collector,
An entrance door provided on a front surface of the dust collection unit main body;
An exit door provided on a rear surface of the dust unit main body;
Electrode unit provided in the air flow path inside the unit body
And the entrance door on the air inflow side of the electrode unit.
On the back side and the back side of the exit door on the air outflow side, respectively
Cleaning pipes provided in a plurality of stages,
A plurality of electrode unit cleaning nozzles, and the electrode
A drain pan installed below the unit, and a cleaning pipe provided at the entrance door and the exit door.
An electrostatic precipitator , wherein a drain pan cleaning nozzle is provided separately from the electrode unit cleaning nozzle in a lower cleaning pipe .