JPS6268557A - Electric precipitator - Google Patents

Abstract

PURPOSE:To eliminate the leakage of collected dust from the downstream side of a main body, by arranging an air blower to the downstream side of a dust collecting unit and providing a deflection plate expanding to the downstream side of dust-containing air between the dust-collecting unit and the inner wall of the main body. CONSTITUTION:When a certain degree of dust is accumulated in a dust- collecting unit 103, an inlet side damper 10 and an outlet side damper 110 are fully opened and a jet air stream is blown to the dust collecting unit 103 by an air blower 108 to discharge dust out of the machine from the discharge port 112 provided to the lower part of the dust-collecting unit 103. At this time, a part of the jet air stream issued from the air blower 108 directs to a wall surface side air blocking plate 104 and a central side air blocking plate 105 but reflected to the side of the dust-collecting unit 103 by a wall surface side deflection plate 106 and a central side deflection plate 107. As a result, the leakage of soot from the opening part 110 of the outlet side damper 109 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrostatic precipitator installed in a tunnel.

Conventional technology Traditionally, dust collectors for tunnels are installed in narrow spaces within tunnels, so a two-stage electrostatic precipitator, which is compact and can satisfy high dust collection performance, has been used, separating the charging section and the dust collection section. However, the charging section and the dust collecting section are independent units for ease of manufacture and maintenance, and multiple units are housed in a housing to form a dust collector. A wind shield plate is provided at the rear end of the dust collecting unit to completely prevent dust-containing gas from passing through the gaps between the units and the gaps between the walls of the unit casing without being collected. In addition, an air blower was installed behind the wind shield on the housing side to blow away all the soot and dust that had accumulated on each unit with a jet of air.

FIG. 2 shows an example of this, in which 1 is a housing having a plurality of charging units 2 inside, and a plurality of dust collection units 3 are arranged downstream of each of the charging units, and 4 is a housing. A band-shaped windshield plate provided in the dust collecting unit 1 closes the gaps between the dust collecting units 3 and the gaps between the dust collecting units 3 and the wall surface of the housing 1. Reference numeral 5 denotes an air blowing device for blowing off the soot and dust accumulated on the charging unit 2 and the dust collection unit 3 with a jet of air, and it is installed on the downstream side of the wind shielding plate 4. It is carried out of the machine by pneumatic transport through a suction lower provided at the bottom 6 of the machine. 8 is an inlet damper installed on the upstream side of the casing 1, and 9 is an exit damper installed on the downstream side of the casing 1, which are closed during dusting to completely prevent soot and dust from leaking out of the machine. . However, at this time, the exit side damper 9 was provided with some openings 10 in order to allow all the air necessary for air transport to flow in.

Problems to be Solved by the Invention The above-mentioned conventional electrostatic precipitator prevents the soot and dust inside the machine from leaking out of the machine from the opening 1O by sucking air for transporting soot and dust into the machine through the opening 1Q. However, part of the jet air from the air blow device 5 is reflected by the wind shield plate 4, and its flow velocity at the opening 1o overcomes the inflow velocity due to air transport, causing soot and dust to leak out of the machine. The present invention takes into consideration the above-mentioned conventional problems, and provides an electrostatic precipitator for tunnels in which jet air from an air blower is prevented from being reflected by the wind shield plate 4, and soot and dust do not leak out of the device. Our goal is to provide the following.

Means for Solving the Problem In order to solve this problem, the present invention includes a charging unit provided in the main body on the upstream side of the dust-containing air, a dust collection unit provided on the downstream side of this charging unit, an air blowing device provided downstream of the dust collecting unit and blowing a jet of air to the dust collecting unit, and at least between the dust collecting unit and the inner wall of the main body, the downstream side of the dust-containing air is deflected. It is constructed by providing a plate.

Operation With the above configuration, all the jet air discharged from the air blow device is guided to the dust collection unit side by the deflection plate, so that no soot and dust leaks from the downstream side of the main body.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIG. In the figure, 101 has a plurality of charging units 102 inside,
The dust collecting unit 103i is provided on the downstream side of each of the charging units 102, and the downstream end of the dust collecting unit 1o3 has a wall side wind shielding plate 104 and a center side wind shielding plate 105.
is fixed to the casing 101, and the wall-side wind shield 104 has a plate-shaped wall-side deflector whose one end is connected to the opening end of the wall-side wind shield 104 and the other end is connected to the wall of the casing 101. Board 106
However, each of the central deflection plates 107, which is an angular plate having a certain angle and whose open ends are connected to both ends of the central wind shield plate 106, is attached to the central wind shield plate 106, which is still open on both sides. ing.

A charging unit 102.108 is provided downstream of the dust collection unit 103. This is an air blow device that supplies a jet of air to the dust collection unit (dust collection unit) 103. 109 is the entrance side damper,
Reference numeral 110 denotes an exit side damper, which has a structure that leaves a slight opening 111 even when it is closed.

With the above configuration, when collecting dust, the inlet side damper 10
9 and exit side damper 110 are fully opened, the dust-containing air is guided to the charging unit 102 and charged.0 The dust-containing air that has passed through the charging unit 102 is removed by the dust collecting unit 103, and clean air is generated. It is released from the exit side damper 110 which is fully open.

When a certain amount of dust still accumulates in the dust collection unit 103, the inlet side damper 109 and the outlet side damper 110 are fully closed, and a jet of air is sent from the air blower to the dust collection unit 103.
-103, and the dust in the dust collection unit 1o3 is discharged outside the machine from the discharge port 112 at the bottom of the dust collection unit 103.

At this time, part of the jet air coming out of the air blow device 108 is transferred to the wall-side windshield plate 1o4. Although the air is directed toward the central wind shielding plate 105, these are reflected toward the dust collection unit 103 by the wall deflecting plate 106 and the central deflecting plate 107.

As described above, according to this embodiment, the air blow device 108
The jet air emitted from the wall-side deflection plate 1Q6. It is guided to the dust collection unit 103 side by the center side deflection plate 107, and is guided to the wall side windshield plate 1o4. It is possible to prevent soot and dust from leaking from the opening 110 of the outlet damper 109 by being reflected by the central/side wind shield plate 106.

Effects of the Invention As is clear from the above description of the embodiments, by attaching the deflection plate, the jet air from the air blow device is all guided to the dust collection unit side by the deflection plate, and is not directed to other parts. Dust can be removed from the dust collection unit without leaking soot and dust, and an electric precipitator with better dust collection performance can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electrostatic precipitator according to an embodiment of the present invention;
FIG. 2 is a sectional view of a conventional electrostatic precipitator. 104...Wall side windshield plate, 105...
Center side windshield plate, 106...Wall side deflection plate, 10
7... Center side deflection plate, 108... Air blow device. Name of agent: Patent attorney Toshio Nakao and one other person
4-I If 1 flight j Oboro A one-off, ■su (Fig. 2

Claims (1)

[Claims] A charging unit provided on the upstream side of the dust-containing air in the main body, a dust collection unit provided on the downstream side of this charging unit, and a dust collection unit provided on the downstream side of this dust collection unit, which blows a jet of air onto the dust collection unit. 1. An electrostatic precipitator comprising: an air blowing device; and a deflection plate is provided at least between the dust collection unit and the inner wall of the main body to spread dust-containing air on the downstream side.