JPS5982955A - Circulation electrode type electrostatic dust collector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Electrostatic precipitator is a technology that applies electric force (high voltage DC voltage) to fine particles such as liquids and solids suspended in airflow (airflow) and extracts them separately. It is well known that highly efficient dust collection is achieved by applying a charge to fine particles using corona discharge, and then applying an electric field to drive them toward a dust collecting electrode using Coulomb force.

Depending on the structure of the static electricity precipitator, there are two types: a single-stage type that stores fine particles and collects dust in the same space, and a separate type that stores particles and collects dust in separate spaces.
In other words, it can be roughly divided into two stages (two stages 'tortoise shape'), which are performed using separate electric fields. Although the present invention belongs to the two-stage type dust collector, it relates to a dust collector having a completely new configuration and effect that eliminates the drawbacks of conventional dust collectors. Note that the present invention can also be of a continuous type with two or more stages.

No. 11 is a schematic diagram of the configuration of a conventional two-stage electrostatic precipitator.
It is assumed that the smoke air stream 6 contains only fine particles having a particle size of, for example, 5 lt or less. Fine particles larger than 5μ can be easily removed using other known equipment,
This is because removing -1- is the most effective method of using a static air precipitator. Figure 1 shows 4 pads and 1 (・
Give the smoke 1iirT to the smoke and dust in the load section. 6 and 4 (
, ), lJ'l den jki lj return - C analogy (71,
T Before OKV? & )N If KaJfJ If the discharge occurs, a positive corona discharge is used to reduce the generation of ozone and nitrogen oxides accompanying the discharge. In this example, 6 is a thin metal wire of the negative electrode, and opposite to 4 and 5 is a grounded positive electrode with a relatively large surface area.

In this charging section 1, the gas near the center electrode 6 is ionized 1]-
Negative ions are generated, but the electric field is weak in the first part of the evening and is not carried out before the seeding charge.The fine particles contained in the gas adhere to these ions and become charged, and the electric force collects the dust in the dust collecting section 2. ' Driven to the upper pole side. At this time, some particulates near the discharge electrode are collected on the discharge electrode 4, but this is small due to the structure of the electrode. 2 is a dust collection part (d) where electrode plates 5 with a thickness of 1 mm or less are arranged in parallel at intervals of about 40 to 80 m11,
It is alternately connected to the negative high 1EIE voltage Δbt (around 50KV) and the positive ground electrode.

AY; Charged fine particles driven from the bottom part 1 to the dust collecting part 2 stick to the electrode plate 5Q) (the positive electrode plate in this example) and are collected. Arrange another clean device of the type shown in Figure 1 in series,
The fine particles that are difficult to collect with the device shown in Figure 2.1 are collected by the second stage device'f.
f1 (same as Fig. 1, but narrow the gap between the board 5)
A two-stage continuous type that captures images with a 2-stage system, and a multi-stage system are also in use.

The problem with these conventional electrostatic precipitators is the method of removing old particulates and dust that have adhered to the dust collection electrode, whether it is a positive or negative electrode, and the amount of dust collected is In actual cases where there is a lot of accumulated dust, at least two dust collection sections 2 should be installed, replaced regularly, and cleaned relatively frequently, but there should be a temporary stoppage due to mechanical impact.
Techniques such as buranonku, kasuri 1 jo, etc. are used.

This has disadvantages such as being difficult to handle, requiring a long downtime, occupying a large area, and being expensive. It is also important to prevent collected dust from accumulating and scattering again, and to prevent the dust collection efficiency from decreasing over time. The present invention was made to eliminate these drawbacks, and will be described in detail below.

Figure 2 shows a structural example of an electrostatic precipitator according to the present invention.
): Yolli cross-sectional view 0) is -771 ( in (B)
:+14111 figure. (B) [At ≧811, the airflow (via fine particles of 50/I or more) 6 enters the charging part (light 1 tube The microparticles are moved to a collection J4:lX1t 10 in the same manner as in FIG.

Figure 2 ()\) is collection 17; 13 @1510 cut 1fj
Figure i shows the part where point ii is the difference in the present invention. The direction of the air flow is, for example, the direction of the back of the paper or the surface of the paper, and 14 is a plurality of parallel fixed poles that have a force corresponding to the amount of dust collected per night.They can be either positive or negative, but in this case, a negative high pressure is applied.

15 is a positive electrode (ground) (!: endless movement) opposite to 14, using a plurality of rollers 16 and a motor (not shown); The electrodes 141 and ζ meander at a relatively gentle speed, facing each other, and make 11 prefectures between the two characters 10.i l as shown below. 15 is a flat electrode made of a conductor with very good conductivity. It was undesirable, Tayoshie (・; ↓ Flat Illze of thin stainless steel knitted in a flat shape, '1F
LI+@ should be used. FIG. 2(C) is a partially detailed view of FIG. 2(A).
Be installed on.

One of the important features of the present invention is that the dust collection section 10 and the dust collection electrode cleaning section 11 are housed in separate rooms, so that the area around the dust collection section 1o o)% pole is sufficient for the ribs. Airtight shielding 2
2, and the cleaning section 11 is further separated from the dust conveying section 18 by a partition 17. The amount of dust collected in the dust collection unit 10, that is, the airflow cleaning chamber (41 particles landed on the ball +5), and the dust should be immediately transported to the electrode cleaning unit 11, but the dust stuck to the electrodes is difficult to fall off and further retains the charge. Therefore, the entrance of the electrode cleaning section 11 is equipped with a cleaning device 1 and a dust collection circulation system.
A large amount of dust adhering to the crotch belt's sleeping pole 15 is neutralized and disappears by placing it in the reverse pole L's Ichikawa, so that the dust, i.e., the dust, can easily fall into the hopper-like cleaning section 71. do.

20 is a rotary hammer that removes dust by applying a blow (huff ring) to the bell mill electrode 15, and 21 is a metal wire that removes dust on the bell mill-shaped electrode 15. This is the plan.

In addition, the dust collecting section 10 and the gathering room cleaning section 11 can be safely shielded from each other by keeping the indoor air ratio between 1 and 2, and the room has the same atmospheric pressure. The belt-shaped upper pole 5 enters and exits from the shield 22 to the top 11.
The bottom b of the cleaned part 11 is a well-known sluice valve.
, a gate valve) 12 is installed, and if the rotation of this valve deviates, the dust is immediately pushed out to the held conveyor] 6-42 without affecting the air pressure in the chamber, and a chute is installed in the dust collector's space. be automatically carried away by. Therefore, there is no risk of dust particles falling during cleaning scattering and causing contamination.

When using the electrode 15 that circulates between two partitions as shown in Fig. 0), it is necessary to clean the dust collected in the dust collection section 10 that has adhered to the surface of the dust collection electrode 15. The cleaned electrode 15 is carried to the dust collection section 11, where the electrode surface is cleaned.The cleaned electrode 15 is returned to the dust collection section 0, and the process of collecting dust on the cleanest electrode surface is repeated indefinitely. It can be done with ~. Because of this, the device of the present invention has high dust collection efficiency.
I don't have the peace of mind to stop the device to clean the electrodes,
The effect of increasing the operating rate is υθ.

In terms of dust collection efficiency, conventional dust collection equipment generally performs airflow cleaning and 'electrode ('^^ cleaning) in the same place and space at different times (↑;), whereas the dust collection of the present invention In the device, dust collection and cleaning are performed independently at two separate/two locations, and the dust collection electrode is constantly circulated between the two locations (sections).The dust collection efficiency of the device of the present invention is That's significantly better ;).

4 Drawing) Inside the cylinder, explanation 1st L': i (i Schematic diagram of the configuration of a conventional electrostatic precipitator,
Figures 3 and 2 are structural examples of an electrostatic precipitator device according to the present invention.
is a side sectional view, (C) is a part of the left side of [B]
Figure-(2a-a).

1...Charging part, 2. Co0...Dust collection section (dust collection chamber)
, 5...center electrode, 4...discharge electrode for 3, 5
...Dust collecting part electrode, 6...Dirty input airflow, 7
...Airflow inlet, 8.Cleaned air outlet, 9-.Cleaned airflow, 11.Hopper-shaped electrode cleaning j<B, ko2 through hull 7', +3.Heald conveyor. , 14 , 1!5 ・Collection l'': Opposing gap IY, ft electrode on stiff part, 14 ba (j; l constant, 15 is a continuously moving circulating imaginary current (box, 16...τ cola, 1
7... 1 tithe, 18... Komi Transport JA Department, 19
...Static electricity removal device, 20..Hammer, 2 parts, 7., 22..Shielding 14., 26..Zone unit.

Applicant: Ren Zhang Agent Manabu Otsuka Tali name No. IM 2nd (A) Bleaching 2 Flash (C+ +g

Claims (1)

[Claims] The dust collection section of the electrostatic precipitator, which consists of a charging section and a dust collection section, is divided into a dust collection chamber and a dust collection polarization cleaning chamber. Groups of fixed electrodes of the same polarity installed in parallel, which are at ground potential with opposite polarity to the group of fixed viewing electrodes, meander continuously while facing the hibernation of the group of fixed electrodes, spanning the two chambers of the above division. Equipped with a band-shaped circulating electrode point that circulates, the dust collection electrode clean chamber is equipped with a
Equipped with a static electricity removal device and other dust removal devices, the dust that accumulates on the circulation liner surface in the dust collection chamber is removed and collected within the time that the circulating electrode moves in the dust collection electrode cleaning chamber. A circulating upper electrode type electrostatic precipitator that is particularly useful for keeping indoor circulating electrode surfaces always clean.