KR0133366Y1 - Screw type electrostatic precipitator - Google Patents

Abstract

The present invention relates to a screw type electrostatic precipitator, comprising a circular dust collection pipe (7) inside the gas passage (6) to reduce the size of the electrostatic precipitator (1A) and increase the dust collection efficiency, the dust collection pipe (7) By installing a plurality of screw discharge electrodes (8) in the discharge rod (9) while maintaining a predetermined interval in the interior of the fine dust particles by the high-pressure corona discharge can be collected to increase the dust collection efficiency.

Description

Screw Type Electrostatic Precipitator

1 is a structure diagram of a screw type electrostatic precipitator.

2 is a cross-sectional view of a screw type electrostatic precipitator.

3 is a detailed view of the screw discharge electrode

* Explanation of symbols for main parts of the drawings

1: Dust discharge facility such as boiler, incinerator 2: Inertia collision plate

3: unit cyclone 4: guide van

5: cyclone exit pipe 6: gas passage

7: dust collecting pipe 8: screw discharge electrode

9: discharge rod 10: high voltage supply device

11: insulator 12: hopper

13 gas inlet duct 14 rotary valve

15: dust collecting container 16: separator

17: Re scattering prevention mechanism 18: Gas outlet duct

19: twelfth 20: distribution

21: insulator room 22: high voltage conversion rectifier

23: casing 24: jeongjeongbong support frame

25: dust separation hammer 26: cleaning equipment

27: through insulator 28: plate

The present invention relates to a screw type electrostatic precipitator, and more particularly, to a screw type electrostatic precipitator capable of high efficiency electrostatic precipitating by providing a screw discharge electrode provided at a predetermined interval in a discharge rod provided in a gas collecting pipe. will be.

In general, the electrical collection is a function of generating a corona discharge by direct current high voltage to charge fine dust particles suspended in the dust gas, thereby separating the charged particles from the gas by a timely force in the electric field. Is collected by electrostatic force.

Currently widely used electrostatic precipitator is a plate type, and applies a high voltage of about 60-100KV to a circular rod with a diameter of 4-6m / m and a positive collector plate using an iron plate with a thickness of about 1.2m / m. As the gas passage speed must be maintained at a low speed of about 1.2 m / sec, high efficiency can be maintained.

Therefore, the conventional plate-type electrostatic precipitator has been pointed out as a big disadvantage that the device size is large and the installation cost is high compared to the high efficiency dust collector.

The object of the present invention is to provide a dust collection pipe of the gas passage by maintaining a screw discharge electrode at a predetermined interval in the discharge rod, it is an object to enable electric dust collection.

Hereinafter, the contents of the present invention will be described in detail with reference to the accompanying drawings.

1 is related to the structure of the screw type electrostatic precipitator according to the present invention. When the dust-containing exhaust gas generated in the dust discharge facility 1 such as a boiler or an incinerator is introduced through the inlet duct 13, an inertial collision plate installed at the inlet of the present electrostatic precipitator is shown. The first hit with (2).

In the inertial collision collecting zone where the stainless steel plate with a thickness of about 2 m / m is bent at 90 ° and kept at an angle of 15 ° in a zigzag form in three rows, it collects large particles of 20 microns or more in diameter. it is well suited for more Sm ³ high-concentration waste gas treatment.

The gas passing through the primary dust collecting zone is forced to rotate at a speed of 13-15 m / sec through the guide vane (4) attached to the inside of the unit cyclone (3) and descends while rotating along the inner wall of the cylindrical portion.

When it reaches the cone, the radius of rotation decreases, so the speed increases in the principle of constant rotation moment and the rotation descends to the state.

When it reaches near the bottom of the cone, the flow begins to reverse and ascends toward the cyclone outlet tube 5, rotating the central unit of the cyclone.

At this stage, the dust particles of about 3-20 microns are separated between the dust ash scattering prevention mechanisms 17 attached to the lower part of the unit micron by the centrifugal dust collection principle.

Dust separated in the primary and secondary dust collection areas are collected in the hopper 12 and continuously discharged through the rotary valve 14 to be collected in the dust collecting container 15.

Flue gas containing less than 3 microns of fine particles passed through the primary and secondary dust collection zones is introduced into the tertiary electrostatic collection zone via the gas passage (6).

The gas passes through the dust collecting pipe 7 and alternately passes through the incoming screw discharge electrode 8 and the dust collecting zone at a speed of 3-4 m / sec.

As shown in FIG. 3, a negative (−) high voltage is applied to the entire discharge rod 9.

The discharging end of the discharging electrode of the screw discharging electrode 8 is sharply processed, and the corona discharge is vigorously generated at this portion.

In addition, the moment when passing through the screw discharge electrode is obtained a significant rotation force fine particles of less than 3 microns are moved toward the dust collection pipe (7) by the centrifugal force.

At this time, the surrounding space is filled with (-) ions and electrons by the corona generated at the end of the screw discharge electrode (8), and the fine dust is charged with (-), which together with the electrostatic coagulation action, affects the COULOMB force. By this, the dust collecting pipe 7 is rotated and attached toward the inner wall surface.

The dust attached to the inner wall of the dust collecting pipe (7) loses (-) charge and moves downward into the hopper (12) by the self-weight or vibration of the dust separation hammer (25) along the airflow direction. And collected in the branch collecting container 15.

In FIG. 3, the shape of the screw discharge electrode 8 is shown in detail. In FIG. 3, a plate type electrostatic precipitator of about 15-20 KV generated from the high voltage change rectifier 22 which changes the AC low voltage into a direct high voltage to charge the screw discharge electrode. The voltage much lower than that is supplied to all of the discharge electrodes via the support insulator 11 installed in the insulator chamber 21 via the through insulator 27.

The up and down discharge rod support frame 24 which tied the plurality of discharge rods 9 together is firmly supported by four support insulators 11.

The discharge beam 9 and the screw discharge electrode 8 are made of stainless steel in consideration of corrosion.

Blue and blue gas removed through the first, second, and third dust collecting zone to the fine dust is air-spun into the stack 19 by the gas outlet duct 18 installed directly below the separator plate 16.

A diaphragm 18 is installed inside the dust collector hopper 12 so that there is no mutual scattering between the primary side and the secondary side, and an inspection material opening 26 is installed on each part of the apparatus to check the blockage inside the apparatus. In order to prevent performance degradation due to dust deposition, the dust separation hammer 25 is operated at any time by a timer operation inside the operation panel so that the accumulated dust is dropped.

The gas inlet duct 13 is provided with a plurality of distribution plates 20 to uniformly supply the gas flowing therein.

As described above, the present invention maintains a screw discharge electrode in the gas collecting pipe of the gas passage at regular intervals to increase the collecting efficiency, thereby making it possible to achieve high-efficiency electric dusting while having a low installation cost, and dry construction. Accordingly, there is an advantage that does not need to install a separate waste water treatment facility because it excludes the use of the washing water compared to the conventional wet.

Claims (2)

In order to reduce the size of the electrostatic precipitator 1A and increase the dust collecting efficiency, a circular dust collecting pipe 7 is provided inside the gas passage 6, and the screw discharge electrode 8 is discharged into the dust collecting pipe 7. Screw type electrostatic precipitator which collects fine dust particles by high pressure corona discharge by maintaining a certain interval in 9). The dust collector of claim 1, wherein the first inertial collision dust collector 1B and the second centrifugal force dust collector 1C are integrally installed just before the electrostatic precipitator 1A, and the electrostatic precipitation is performed after first removing the particles having a large particle size. Screw type electrostatic precipitator with maximum dust collection efficiency.