JPH0231155Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a power supply section for a paper dust collecting electrode used in an electrostatic precipitator.

Paper is usually treated as an insulator, but strictly speaking, it is known that it has properties that should be considered a semiconductor. For example, when a high voltage is applied, the entire paper exhibits a certain potential, causing a minute current to flow. Electrostatic precipitation can be performed using such properties. (See, for example, Published Patent Publication No. 59-69162 filed by the present applicant.) However, depending on the humidity in the air, the specific resistance of paper changes from 1 MΩ-cm (95% relative humidity) to 10 ⁸ MΩ-
cm (relative humidity 20%), so measures must be taken to deal with this.

It is known that the current required to attach charged fine particles to the electrode during dust collection is 10 ^-4 μA/cm ² . The dust collection voltage in a dust collection chamber with an electrode spacing of 3 mm is approximately 3000V, and if the voltage drop within the electrodes is allowed to be 10%, or 300V, the specific resistance X [MΩ] of the electrodes is as follows: .

10 ^-4 [μA] × X [ ^MΩ ] = 300 [V] ∴ I will do it. Therefore, it is necessary to compensate for this by applying a desired conductive treatment to one side of the paper and also by ensuring that power can be properly supplied to each electrode. Paper electrodes subjected to such conductive treatment have the following characteristics compared to conventional metal electrodes.

1. It is inexpensive and can be thrown away after use. In particular, incineration is also possible.

2. By performing conductive treatment on only one side, it is possible to form a desired electric field, and the electrode spacing can be narrowed or the dust collection effect can be enhanced.

3. By facing the conductive treated surface and the non-conductive treated surface, corona discharge or spark discharge can be prevented while maintaining sufficient dust collection efficiency.

4 From 2 and 3 above, it is possible to increase the applied voltage and form a strong electric field. Therefore, the dust collection electrode can be made smaller.

Electrostatic precipitators using paper electrodes that take advantage of these properties are inexpensive, compact, and easy to maintain, so they can be widely used in offices, shops, play areas, general households, etc. . In such applications, unlike large industrial dust collectors, it is a prerequisite that cleaning and maintenance can be carried out easily. Therefore, it is desirable that the dust collecting section can be extremely easily attached and detached from the housing section, and that cleaning and maintenance can be performed easily. Moreover, it is required to constantly maintain high dust collection efficiency and maintain sufficient air purification effect without using a complicated control device or the like. A dust collector that satisfies all of these conditions has not been available in the past.

An object of the present invention is to provide a structure for a paper electrode power feeding section of an electrostatic precipitator that satisfies the above requirements and achieves high cleaning efficiency that cannot be achieved with conventional devices.

This purpose is based on the structure of the paper electrode power supply part of the electrostatic precipitator having the configuration described in the patent claims, in which the positive and negative dust collecting electrodes are disposed close to each other with a predetermined gap between them. A conductive power supply piece is provided on a part of both electrodes for each positive and negative electrode, and in order to supply power to both electrodes, a conductive member is provided with a notch to sandwich each of the power supply pieces for each positive and negative electrode. This is achieved by a structure of a paper dust collection electrode power supply section in which a power supply conductor plate is arranged on the back surface of the conductive member.

According to the structure of the paper dust collection electrode power supply part according to the present invention, it is possible to downsize the structure of the electrode power supply part and simplify the electrode assembly process while satisfying electrical characteristics.

Hereinafter, the present invention will be disclosed with reference to the accompanying drawings, which illustrate embodiments.

FIG. 1 is a perspective view showing the assembly configuration of positive and negative electrode plates forming the paper dust collection electrode according to the present invention.Actual dust collection electrodes are constructed three-dimensionally by overlapping the required number of such electrode groups. be done. The main body 1 of the paper electrode is
Paper of appropriate thickness and hardness, with the same positive and negative structures, are alternately reversed and arranged. It is convenient if this material is subjected to surface treatment to suppress fuzz, flameproofing treatment, etc., as necessary.
In this embodiment, it is approximately rectangular, and a power feeding piece 2 is formed at one end. Further, a required number of fixing holes 4 are provided at appropriate positions to maintain a predetermined gap with a separator (not shown).

A part of one side of the main body 1 including the power feeding piece 2 is subjected to conductive surface treatment such as hatching 5, for example. As mentioned above, the conductivity decreases depending on the relative humidity, so this is intended to compensate for this and always achieve the required potential distribution. All of these surface conductive treated surfaces are directed in the same direction,
It is convenient to arrange them so that they are on the paper side in the figure. (The reason is that the above-mentioned published patent publication
See No. 59-69162. ) In this example, the power feeding pieces of the paper electrodes shown here are arranged alternately so that they are gathered on the left and right for each positive electrode and negative electrode. The power feeding pieces in this figure are arranged so that the left side is negative and the right side is positive. Therefore, positive and negative high voltages are supplied from both ends.

FIG. 2 is a perspective view showing the structure of a conductive member for feeding power to the power feeding piece 2 of FIG. 1. FIG.
The conductive member 6 may be, for example, a soft conductive urethane foam having an appropriate thickness and dimensions.
This member 6 is provided with a number of notches 7 corresponding to the number of electrodes to be supplied with power. Each of these notches 7 holds the power feeding piece 2 shown in FIG. When feeding power to the power feeding piece 2 using such a soft conductive member, there are the following characteristics.

The soft conductive member does not damage the feed piece.

Since the soft conductive member has elasticity to pinch the power supply piece, it will not come off.

Since it makes surface contact with the power supply piece, reliable power supply is possible.

The structure is simple.

Uniform power supply is possible.

Further, as shown in FIG. 3, it is more convenient to configure a structure in which a conductive plate 8 is closely attached to the back surface of the soft conductive member 6 in FIG. 2 to enable uniform power supply to the entire member 6. . As the conductor plate 8, a suitable thin plate such as stainless steel can be used, and the conductivity of the conductive member 6 can be improved. This configuration provides the following features.

To prevent damage to a soft conductive member when a dust collection electrode assembly is attached to and removed from a dust collector main body.

More uniform power supply is possible.

Even if an arc occurs between the power supply spring of the dust collector main body and the power supply part of the dust collection unit, it will not ignite.

The power supply spring of the dust collector main body and the power supply part of the dust collection unit can be smoothly attached and detached.

FIG. 4 shows an embodiment in which the soft conductive member shown in FIG. 2 or 3 is placed in a frame 9. This configuration provides the following features.

The mechanical strength of the power supply unit including the conductive member is increased, and reliability is improved.

Replacement can be done easily.

Insulation of high voltage parts can be ensured.

By configuring the power supply section for the paper electrode in this manner, desirable characteristics for electrostatic precipitating action can be obtained. That is, since the paper electrode as a whole has a conductivity comparable to that of a semiconductor as described above, the connection of the power supply part must be established reliably, and the paper electrode is particularly suitable for this requirement. If uniform and reliable power supply is not performed, the potential of the dust collecting electrode will partially fluctuate, increasing the possibility that uncollected particulates will be generated. Therefore, the designed dust collection efficiency cannot be achieved. According to the structure of the power supply part of the paper dust collection electrode according to the present invention, uniform power supply to the entire electrode is achieved, so this problem does not occur. In particular, it is known that when the amount of dust collected by a paper dust collecting electrode exceeds a certain range, the leakage current increases dramatically, but if the power supply is uncertain, the potential non-uniformity will further increase. It tends to become more noticeable. Even in this case, the structure of the paper electrode power supply unit according to the present invention makes it possible to supply a uniform and reliable dust collection voltage, thereby ensuring a predetermined dust collection efficiency.

Furthermore, the assembly process is simple and economical.
By applying paper electrodes having such a configuration, an electrostatic precipitator is formed in which the electrodes can be disposed of and therefore easy to maintain, and highly efficient dust collection is possible while taking economic efficiency into account.

Although the invention has been disclosed in accordance with preferred embodiments thereof, it will be obvious that many variations and modifications may be made within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of a paper dust collecting electrode according to the present invention. FIG. 2 is a perspective view showing an example of a soft conductive member used in the structure of the paper electrode power supply unit according to the present invention. FIG. 3 is a perspective view showing another embodiment of the structure of the paper electrode power supply unit according to the present invention. FIG. 4 is a perspective view showing still another embodiment of the structure of the paper electrode power supply unit according to the present invention. The correspondence of the main reference symbols in the figure is as follows. 1...
...Electrode plate, 2...Power supply piece, 4...Fixing hole, 5...
Conductive processing section, 6... Soft conductive member, 7... Notch, 8... Conductor plate, 9... Frame.

Claims (1)

[Scope of Claim for Utility Model Registration] In the structure of a power supply part for a paper dust collecting electrode used in an electrostatic precipitator, positive and negative dust collecting electrodes are arranged close to each other with a predetermined gap, and a part of both electrodes is disposed close to each other with a predetermined gap. A conductive member is provided for each of the positive and negative electrodes, and a conductive member provided with a notch is provided to sandwich each of the power supply pieces for each of the positive and negative electrodes in order to supply power to both electrodes, and A structure of a paper dust collection electrode power supply section, characterized in that a power supply conductor plate is disposed on the back surface of the conductive member.