JPH1057836A - Cleaning device for gas containing particulate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device for gas in which roaring corona discharge is generated even at comparative low voltage and an electrostatic precipitator is continuously operated without stopping operation thereof and collected soot is efficiently separated and discharged to the outside of a system. SOLUTION: A discharge electrode 2 provided with projections 3 in a suction pipe is provided on the inlet side of the suction pipe 1. An exhaust pipe is connected to the rear of the discharge electrode. A dust collection electrode 5 consisting of a wire gauze or a perforated metallic plate is provided nearly vertically for flow of sucked gas in the vicinity of the inlet of the exhaust pipe. An endless belt 8 rotated by a belt-driving device 7 is approached and provided to/along the front of the dust collection electrode 5 and provided movably through the inside of a closed tank. A removing means for removing the stuck collected soot and dust from the endless belt 8 is provided in the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric precipitator, and more particularly to a device for removing and discharging trapped soot.

[0002]

2. Description of the Related Art When exhaust gas from an incinerator or the like is discharged to the outside, in a conventional electric precipitator, a gas containing fine particles is charged negatively by corona discharge using a discharge electrode.
The dust collecting electrode is attached to a positive potential collecting electrode, and the dust collecting electrode is peeled and removed as an aggregate of fine particles by hitting.

[0003]

The dust soot collected by the conventional electric dust collector is liable to be scattered as it is, so that it is mixed again with the exhaust gas and the separation efficiency of the fine particles is poor. In order to remove the collected dust and soot, the operation of the electric precipitator is stopped, and the dust collection electrode is struck to separate and remove as an aggregate of fine particles. The present invention solves the above-mentioned problems, enables continuous operation without stopping operation of the electrostatic precipitator, enables efficient separation of fine particles, and allows the collected soot to adhere to an endless belt as a filter and collect. An object of the present invention is to provide an electrostatic precipitator that does not adhere to dust electrodes.

[0004]

The electric dust collector A of the present invention will be described with reference to FIG. At the entrance side of the intake pipe 1,
A discharge electrode 2 provided with a projection 3 is provided at the center of the intake pipe 1.
An exhaust pipe 4 is connected behind the discharge electrode 2. Exhaust pipe 4
At the entrance of the gas, perpendicular to the flow of gas to be inhaled,
A dust collecting electrode 5 made of a wire mesh or a perforated metal plate is provided fixed by an insulator 6. The endless belt 8 rotated by the belt driving device 7 is brought close to and in front of the dust collecting electrode 5,
It is provided movably through the cleaning liquid tank 9. In the washing tank,
A means for removing dust soot from the endless belt 8 is provided. As means for removing dust soot from the endless belt, for example, there is a jetting means for cleaning liquid, and the cleaning liquid 10 is jetted from the nozzle 12 to the endless belt 8 by the jet pump 11 to remove dust soot. As another means for removing dust soot from the endless belt, dust soot may be removed from the endless belt 8 by scraping with a rotating brush. The cleaning liquid tank 9 is provided with a supply tank 14 for the cleaning liquid 10 via an automatic liquid supply device 13 and a solid-liquid separation device 16 for the cleaning liquid 10 via a pump 15.

[0005]

The operation of the electric precipitator A of the present invention will be described with reference to FIG. Dust-containing air or exhaust gas is sucked from the inlet side of the intake pipe 1, and fine particles therein are negatively charged by corona discharge by a discharge electrode 2 provided with a projection 3 at the center of the intake pipe 1, and the discharge electrode 2 is discharged. Is drawn toward a dust collecting electrode 5 made of a metal mesh or a perforated metal plate provided perpendicularly to the flow of the gas to be sucked in from the inlet of the exhaust pipe 4 after the end, and is rotated by a belt driving device 7. It adheres to the belt 8. Since the radius of curvature of the tip of the discharge electrode 2 is extremely small, vigorous corona discharge is generated even at a relatively low voltage. The endless belt to which the fine particles adhere is the dust collection electrode 5
Is moved to the cleaning liquid tank 9 from a position close to the front of the tank. The cleaning liquid 10 is sprayed from the nozzle 12 to the endless belt 8 by the spray pump 11 in the cleaning tank. In the cleaning liquid tank 9,
The cleaning liquid 10 is supplied to the supply tank 14 by the automatic liquid supply device 13.
More replenished. The solids in the cleaning liquid are separated into solid and liquid by the solid-liquid separator 16 together with the cleaning liquid 10 via the pump 15, the solids are discharged, and the cleaning liquid is returned to the cleaning liquid tank and circulated for reuse.

[0006]

According to the present invention, a vigorous corona discharge can be generated even at a relatively low voltage, dust soot adheres to an endless belt which is a filter, and dust soot is removed in a closed tank. Therefore, without stopping the operation of the electric precipitator, it can be operated continuously to efficiently separate the dust soot and discharge it to the outside of the system. Therefore, it is not mixed again with the exhaust gas exhausted from the electrostatic precipitator, and has excellent effects such as an extremely high efficiency of separating fine particles.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an electric precipitator of the present invention.

[Explanation of symbols]

 1: Intake pipe 2: Discharge electrode 3: Projection 4: Exhaust pipe 5: Dust collecting electrode made of a wire mesh or a porous metal plate 8: Endless belt 9: Cleaning liquid tank 10: Cleaning liquid 12: Means for removing dust soot A: Electricity Dust collector

Claims (4)

[Claims] A discharge electrode (2) provided with a projection (3) in the intake pipe is provided at an inlet side of the intake pipe (1), and an exhaust pipe (4) is connected behind the discharge electrode. Near the inlet of the exhaust pipe, almost perpendicular to the flow of the gas to be sucked,
A dust collecting electrode (5) made of a wire mesh or a perforated metal plate is provided, and an endless belt (8) rotated by a belt driving device (7) is brought close to and in front of the dust collecting electrode 5, so that the inside of the closed tank is closed. And an eliminator for removing dust and soot adhering from the endless belt (8) in the tank. 2. A discharge electrode (2) provided with a projection (3) in the intake pipe at an inlet side of the intake pipe (1), and an exhaust pipe (4) is connected behind the discharge electrode. Near the inlet of the exhaust pipe, almost perpendicular to the flow of the gas to be sucked,
A dust collecting electrode (5) made of a wire mesh or a perforated metal plate is provided, and an endless belt (8) rotated by a belt driving device (7) is brought close to and in front of the dust collecting electrode 5, and a cleaning liquid tank (9). And a cleaning liquid jet nozzle (12) for jetting a cleaning liquid (10) to an endless belt to remove adhering dust and soot in the cleaning tank. . 3. A discharge electrode (2) provided with a projection (3) in the intake pipe at the inlet side of the intake pipe (1), and an exhaust pipe (4) is connected to the rear of the discharge electrode. Near the inlet of the exhaust pipe, almost perpendicular to the flow of the gas to be sucked,
A dust collecting electrode (5) made of a wire mesh or a perforated metal plate is provided, and an endless belt (8) rotated by a belt driving device (7) is brought close to and in front of the dust collecting electrode 5, and a cleaning liquid tank (9). An electric dust collector characterized by being provided so as to be movable through a washing tank, and a rotating brush for brushing an endless belt (8) in a washing liquid (10) to remove dust soot adhering thereto in the washing tank. . 4. A discharge electrode (2) provided with a projection (3) in the intake pipe at the inlet side of the intake pipe (1), and an exhaust pipe (4) is connected behind the discharge electrode. A dust collecting electrode (5) made of a wire mesh or a perforated metal plate is provided near the inlet of the exhaust pipe so as to be substantially perpendicular to the flow of the gas to be sucked in, and is rotated by a belt driving device (7). An endless belt (8) is provided in close proximity to the front of the dust collecting electrode 5 and is movably provided through a cleaning liquid tank (9), in which a cleaning liquid (10) is sprayed onto the endless belt. An electrostatic precipitator comprising: an injection nozzle (12); and a washing liquid tank provided with a solid-liquid separator (16) for the washing liquid.