JPH08155337A - Electric dust collector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electrostatic precipitator that can be easily discharged by reliably melting collected snow with a dust collector and turning it into a water state. A dust collecting electrode frame 20 which constitutes the dust collecting electrode 16 is constructed by connecting pipes 28, 28, ... To allow passage of a high temperature fluid into the pipes 28, 28 ,. The dust collecting plates 26, 26 provided on the 20 are provided with the convex grooves 32, 32, ... As a result, the snow collected on the dust collecting plates 26, 26 does not fall directly downward, but falls along the convex grooves 32, 32, ... The snow falling along the convex grooves 32, 32, ... Drops while approaching the dust collecting electrode frame 20 through which the high-temperature fluid flows, so it is gradually melted during the falling and discharged to the drain groove 44. It can be completely melted and discharged as water droplets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator, and more particularly to an electrostatic precipitator that collects snow and fog that flow in when outside air is taken into the building of a power plant in cold regions.

[0002]

2. Description of the Related Art Conventionally, an outside air intake facility 1 used in a power plant, as shown in FIG. 5, takes in outside air from an outside air intake 2 and captures particles such as suspended dust with filters 3, 3, .... After that, the temperature and humidity are adjusted by the heating device 4 and the cooling devices 5, 5, ..., And the air is blown to various places inside the building.

However, in cold regions, when the outside air is taken in, snow, fog, etc. flow from the outside air intake 2,
The snow and fog are collected by the filters 3, 3, ..., There is a problem that the filters 3, 3, ... Are clogged, and the filters 3, 3 ,.
From such a viewpoint, as shown in FIG. 6, it has been considered to install the electric dust collector 10 in front of the filters 3, 3, ... To collect snow and fog. At that time, the electrostatic precipitator 1
It can be easily imagined that it is effective to heat the dust collecting electrode of 0 by some method to melt and discharge the collected snow. In the conventional dust collector 10 that collects dust, the temperature of the dust 8 that is collected is changed to lower the electrical resistivity and improve the dust collection effect.
It has been proposed to provide the dust collecting electrode 6 with a flow path 7 for circulating a cooling or heating medium, as shown in FIG. In this electrostatic precipitator 10, it is said that the dust collecting electrode 7 preferably has a smooth surface so that the collected dust 8 can be easily separated.

[0004]

However, when the conventional electrostatic precipitator 10 for collecting dust, which has a flow path for circulating the heating medium, is applied to collect snow, the collected snow 8 is collected.
Is not sufficiently heated and is peeled off from the dust collecting electrode in the state of snow as it is. If the peeled snow 8 accumulates in the hopper 9, there is a problem that it becomes difficult to discharge the snow 8 due to freezing when the outside temperature is low.

The present invention has been made in view of the above problems, and therefore, it collects snow and fog accompanied by the outside air taken into the building, and surely melts the collected snow at the dust collecting electrode to obtain water. It is an object of the present invention to provide an electrostatic precipitator that can be easily discharged in the above state.

[0006]

In order to achieve the above-mentioned object, the present invention electrostatically dissipates a discharge electrode for applying corona discharge by applying a high voltage and a charged particle provided opposite to the discharge electrode. An electrostatic precipitator which is composed of a dust collecting electrode for collecting and collects on the dust collecting electrode by charging snow or fog entrained in the outside air taken into the building, wherein the dust collecting plate of the dust collecting electrode It is characterized in that the frame constituting the frame has a pipe structure, a high-temperature fluid is allowed to pass through the pipe, and a large number of convex grooves are provided in the dust collecting plate in an inclined manner.

[0007]

According to the present invention, the snow collected on the dust collecting plate does not fall directly downward, but falls along the convex groove formed by being inclined. Then, the snow falling along the convex groove drops while approaching the frame through which the high temperature fluid flows, so that it is gradually melted while falling along the convex groove and discharged from the convex groove. In this case, it can be completely melted and discharged as water droplets.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an electrostatic precipitator according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of the overall configuration showing an embodiment of an electrostatic precipitator according to the present invention. As shown in the figure, the electrostatic precipitator 1
0 is housed in a dust collector frame 14 formed in a rectangular shape so that the dust collecting electrodes 16, 16, ... And the discharge electrodes 18, 18 ,.

As shown in the side view of FIG. 2, the dust collecting electrode 16 is composed of a dust collecting electrode frame 20 and dust collecting plates 26, 26 attached to the dust collecting electrode frame 20. The dust collecting electrode frame 20 is formed into a substantially rectangular shape by connecting a plurality of pipes 28, 28, ..., And a high temperature fluid flows in the pipes 28, 28 ,. . In addition, the dust collecting plates 26, 26
As shown in the perspective view of FIG. 3, both edge portions 30A, 30A of the plate 30 formed in a substantially rectangular shape are formed in an arc shape, and when attached to the dust collecting electrode frame 20, the arc shape is formed. The edge portions 30A, 30A formed in the above are fitted into the pipes 28, 28, ... In addition, the dust collecting plates 26, 26 include the dust collecting plates 26, 2
6, convex grooves 32, 32 having an L-shaped cross section along the longitudinal direction.
A large number of ... Are attached at a predetermined interval.
2, 32, ... Are installed on the dust collecting plates 26, 26 while being inclined at a predetermined angle from the horizontal state. Further, the respective dust collecting electrodes 16, 16, ... Are integrally formed by connecting the inflow port 34 and the discharge port 36 of the high temperature fluid provided in the dust collecting electrode frame 20 with the connecting pipes 38, 38 ( (See FIG. 1), the dust collector frame 14 is installed at a predetermined angle with respect to the vertical state.

On the other hand, in the discharge electrode 18, as shown in the side view of FIG. 4, discharge lines 42, 42, 42 are formed in a discharge electrode frame 40 formed in a substantially rectangular shape.
It is stretched along the longitudinal direction of 0. The discharge electrode 18 is vertically installed in the dust collector frame 14. A drain groove 44 is provided in the lower part of the dust collector frame 14, and the collected and melted snow is discharged to the outside through the drain groove 44.

The operation of the embodiment of the electrostatic precipitator according to the present invention constructed as described above is as follows. The outside air (white arrow) drawn from the outside air intake 2 shown in FIG.
The electric dust collector 10 collects snow contained in the air. Then, dust such as floating dust contained in the air is further collected by the filter 3, the temperature and humidity are adjusted by the heating device 4 and the cooling device 5, and the air is blown to various places inside the building. In the air blowing process, the electrostatic precipitator 10 collects and discharges the snow that accompanies the outside air as follows.

As shown in FIG. 1, the electrostatic precipitator 1
A high voltage is applied between the discharge electrode 18 of 0 and the dust collecting electrode 16 to perform corona discharge. When the outside air passes between the discharge electrode 18 and the dust collecting electrode 16 where this corona discharge is performed, the snow that accompanies the outside air is charged, and the charged snow is collected by the dust collecting electrode 16. On the other hand, a high temperature fluid is made to flow in the pipes 28, 28, ... Constituting the dust collection frame 20 of the dust collecting electrode 16 shown in FIG. 2, and the heat of the high temperature fluid made to flow in the pipes 28, 28 ,. The heat is transferred to the dust collecting plates 26, 26 via the pipes 28, 28, .... Then, the snow collected on the dust collecting electrode 16 is melted by the heat of the high temperature fluid, falls along the dust collecting electrode frame 20, and is discharged by the drain groove 44.

However, the temperature of the dust collecting plates 26, 26 becomes lower as the distance from the dust collecting electrode frame 20 increases.
The snow collected at the central portions of the dust collecting plates 26, 26 is less likely to melt. However, the snow collected in the central portion does not fall directly below without completely melting it, but rather the dust collecting plate 2
6 and 26 are dropped downward, and the drop is prevented by the convex grooves 32, 32, ... During the fall. This convex groove 3
.. are inclined, the snow is guided by the convex grooves 32, 32, ... And falls while approaching the piles 28, 28 ,. Then, the snow is gradually melted as it approaches the pipes 28, 28, ... And when it is discharged to the drain groove 44 along the pipes 28, 28 ,.

As described above, according to the electrostatic precipitator 10 of the present embodiment, the snow collected on the dust collecting electrode 16 can be completely melted, so that the snow can be easily discharged and used in the conventional type. Since the conventional hopper is unnecessary, the apparatus itself can be made compact and the cost can be reduced. Also, the dust collecting electrode 1
Since the high temperature part of 6 can be effectively used, the flow rate of the high temperature fluid can be reduced.

Further, by installing the dust collecting electrode 16 in a tilted manner, the melted snow can be concentrated and collected as water drops at one point, so that the snow can be easily discharged. The operation of the present embodiment has been described with reference to the example of snow that is entrained in the outside air, but it can also be applied to the removal of water particles such as fog.

[0016]

As described above, according to the present invention,
The snow collected on the dust collecting plate does not fall directly downward, but falls along a convex groove provided with an inclination. Then, the snow falling along the convex groove drops while approaching the frame through which the high-temperature fluid flows, so it is gradually melted during the fall,
When discharged from the convex groove, it can be completely discharged as water. Therefore, the discharge can be facilitated and the device itself can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of an embodiment of an electrostatic precipitator according to the present invention.

FIG. 2 is a side view of an embodiment of a dust collecting electrode of the electrostatic precipitator according to the present invention.

FIG. 3 is a perspective view of an embodiment of a dust collecting plate of an electrostatic precipitator according to the present invention.

FIG. 4 is a side view of an embodiment of a discharge electrode of an electrostatic precipitator according to the present invention.

FIG. 5 is a sectional view of an outside air intake device.

FIG. 6 is a sectional view of an outside air intake device to which the electrostatic precipitator according to the present invention is applied.

FIG. 7 is a side view of a conventional electrostatic precipitator.

[Explanation of symbols]

 10 ... Electrostatic precipitator 14 ... Electrostatic precipitator frame 16 ... Dust collecting electrode 18 ... Discharge electrode 20 ... Dust collecting electrode frame 26 ... Dust collecting plate 28 ... Pipe 32 ... Convex groove 44 ... Drain groove

Claims (1)

[Claims] 1. An outside air to be taken into a building, which comprises a discharge electrode for applying a high voltage to perform corona discharge, and a dust collecting electrode provided opposite to the discharge electrode for electrostatically collecting charged particles. In an electrostatic precipitator that charges the snow and fog entrained in the dust collector to the dust collecting electrode, the frame forming the frame of the dust collecting plate of the dust collecting electrode has a pipe structure, and a high temperature fluid is contained in the pipe. While passing
An electrostatic precipitator, characterized in that a large number of convex grooves are provided on the dust collecting plate so as to be inclined.