JP2019177364A - Electric dust collector - Google Patents

Abstract

To provide an electric dust collector which improves gas seal performance between a dust collecting electrode chamber and a glass chamber than heretofore.SOLUTION: An electric dust collector 10 includes a dust collecting electrode chamber 200, a glass chamber 100, a through-glass 1 which is fixed to the glass chamber 100 and exposes a part of the lower end part side thereof into the dust collecting electrode chamber 200 and a rod-shaped suspension rod 2 which allows one side end part to be supported by the through-glass 1 and allows the other side end part to be inserted into the dust collecting electrode chamber. Therein, a doughnut-shaped washer 12 which has an inner diameter substantially equal to an outer diameter of the suspension rod 2 is fixed to a bottom surface of the through-glass 1 so as to surround an outer edge of the suspension rod 2 via a resinous packing 13 having substantially same shape in flat plane view with the washer 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electric dust collector. Specifically, the present invention relates to an electric dust collector that further enhances the gas sealing performance between the dust collecting electrode chamber and the insulator chamber.

  In an electric dust collector, the insulator supporting the discharge electrode for applying a high voltage is separated from the dust collection chamber by a gas seal structure (a structure that maintains airtightness between the two chambers) provided to prevent the passage of exhaust gas. Placed inside the insulator chamber and avoids contact with the exhaust gas to be treated inside the electric dust collector (see Patent Document 1).

  However, it is still difficult to completely shut off the exhaust gas that rises from the dust collection chamber and enters the insulator chamber, and even if a small amount of exhaust gas flows, it will continue to dust for a certain period of time. Insufficient insulation due to the adhesion of the metal may occur, and stable charging may not be possible.

Japanese Patent Laid-Open No. 2009-1602

  An object of the present invention is to provide an electric dust collector that further enhances the gas sealing performance between the dust collecting electrode chamber and the insulator chamber as compared with the prior art.

  The inventors of the present invention have a case where a penetrating insulator that supports a hanging rod installed by connecting a dust collecting electrode chamber and an insulator chamber, and the insufficiency of ensuring the airtightness of the penetrating insulator itself causes exhaust gas inflow. As a result, the present inventors have found that the above problems can be solved by improving the airtight performance of the insulator itself that has been overlooked. Specifically, the present invention provides the following.

  (1) A dust collecting electrode chamber containing a dust collecting electrode, an insulator chamber disposed above the dust collecting electrode chamber, and a part of the lower end side of the insulator chamber fixed to the insulator chamber Is exposed to the outside of the insulator chamber and has a substantially cylindrical penetrating insulator, one end is supported by the penetrating insulator, and the other end is inserted into the dust collecting electrode chamber. An electric dust collector comprising a rod-like suspension rod, wherein the dust collection electrode chamber and the insulator chamber are arranged apart from each other or through a structure capable of blocking airflow between the two chambers. Are arranged adjacent to each other, and the suspension rod is supported by the penetration insulator so as to penetrate the penetration insulator, and the penetration insulator has a donut having an inner diameter substantially the same as the outer diameter of the suspension rod. The washer has a shape similar to that of the washer in plan view through a resin packing. And the inner edge of the packing by close contact with the outer edge of the hanging rods are fixed to the bottom surface of the through insulator, electrostatic precipitator.

  According to the electric dust collector of (1), the gas seal performance between the dust collecting electrode chamber and the insulator chamber can be further improved as compared with the conventional case.

  (2) The washer on the bottom surface side is fixed to the top surface of the penetrating insulator and screwed to a plurality of rod-shaped bolt members that are suspended inside the penetrating insulator. Electric dust collector.

  According to the electrostatic precipitator of (2), since the packing such as silicon rubber is interposed, it is possible to perform screwing with sufficient tightening strength without damaging the penetrating insulator. The gas sealing performance between the dust collecting electrode chamber and the insulator chamber in the dust collector can be further improved. In addition, by adopting such a structure for mounting the washer and packing, the strength of the mounting part is extremely high, and replacement work such as when the washer and packing have a long life as a sealing material is necessary. Can be done easily.

  (3) The electric dust collector according to (1) or (2), wherein the washer on the bottom surface side is formed by joining two semicircular parts in a manner of sandwiching the suspension rod.

  The electrostatic precipitator of (3) is a configuration suitable for additionally adding a gas seal structure unique to the present invention to an existing electrostatic precipitator, thereby making use of the basic structure of the existing electrostatic precipitator, ( When remodeling to the electric dust collector described in 1) or (2), the ease and efficiency of the remodeling work are significantly improved.

  (4) In the through insulator, a washer having an inner diameter that is substantially the same as the outer diameter of the suspension rod is disposed between the washer and the packing via a resin packing that is substantially the same shape as the washer in plan view. The electrostatic precipitator according to any one of (1) to (3), wherein an inner edge is brought into close contact with an outer edge of the suspension rod and is also fixed to a top surface of the penetrating insulator.

  According to the electric dust collector of (4), the gas seal performance between the dust collecting electrode chamber and the insulator chamber in the electric dust collector described in any one of (1) to (3) can be further remarkably improved.

  ADVANTAGE OF THE INVENTION According to this invention, the electric dust collector which improved further the gas seal performance between a dust collection electrode chamber and an insulator chamber than before can be provided.

It is sectional drawing which shows schematic structure of the electrostatic precipitator of this invention. It is a perspective view which shows schematic structure inside the dust collection electrode chamber of the electric dust collector of FIG. It is a partial expanded sectional view with which it uses for description of the gas seal structure between a dust collection electrode chamber and an insulator chamber in the electric dust collector of FIG. It is a perspective view of the penetration insulator concerning the present invention which constitutes the gas seal structure of Drawing 3.

<Basic structure of electric dust collector>
FIG. 1 is a cross-sectional view showing a schematic configuration of an electric dust collector of the present invention. FIGS. 1A and 1B are cross-sectional views when the electrostatic precipitator 10 is viewed from different directions substantially perpendicular to each other. As shown in these drawings, the electrostatic precipitator 10 includes an upper casing 111, a dust collecting electrode 122 that also functions as a side casing, a lower casing 113, and a frame 114, which constitute the main part of the external structure.

  The casing of the electric dust collector 10 is configured by combining the upper casing 111, the dust collecting electrode 122, and the lower casing 113 in this order from above. This housing is referred to as “dust collection electrode chamber 200” in this specification. In the electrostatic precipitator 10, the dust collection chamber 200 is disposed away from the insulator chamber 100 disposed above the dust collection chamber 10 or adjacent to the insulator chamber 100 through a structure capable of blocking the airflow between the two chambers. Has been placed. The structure that can block the airflow between the two chambers is a sealing structure that has a desired airtightness depending on the type of gas handled by each device, for example, an air seal structure that blocks airflow by air pressure. There may be.

  The dust collecting electrode chamber 200 is fixed by a frame 114 spaced apart from the ground by a predetermined distance. As a material of the dust collecting electrode chamber 200, conductive FRP (Fiber Reinforced Plastics), stainless steel, or carbon steel can be used.

  FIG. 2 is a perspective view showing a schematic configuration inside the dust collecting electrode chamber 200. As shown in this figure, the inside of the dust collection electrode chamber 200 is an upper grid 121, a dust collection electrode 122, a lower grid 123, a suspension rod 2, a discharge wire 124, a weight 126, an upward spray nozzle 127, and a cleaning pipe. 128, downward spray nozzles 129 are provided.

  The upper grid 121, the dust collecting electrode 122, and the lower grid 123 are arranged so as to be spaced apart from each other by a predetermined distance in this order and to be substantially parallel to each other in the horizontal direction.

  The dust collecting electrode 122 is configured by repeatedly arranging a plurality of “chambers” with a rectangular tube as a unit (hereinafter, such units are referred to as “chambers”). Specifically, hereinafter, one of the substantially horizontal directions is referred to as “vertical direction”, and a direction perpendicular to the vertical direction is referred to as “lateral direction”. In this case, N units are repeatedly and continuously arranged in the vertical direction, and M units are repeatedly and continuously arranged in the horizontal direction (hereinafter referred to as “N × M”), thereby collecting dust. A pole 122 is configured. N and M are independent integer values, and in the case of the example shown in FIG. 2, the number of “chambers” of the dust collecting electrode 122 is N × M = 9 × 9. . In addition, the size of the chamber is not particularly limited, but an example is a square tube made of sides with a length of 30 to 50 cm. In addition, as a material of the dust collection electrode 122, conductive FRP can be preferably used.

  The discharge electrode corresponding to the dust collecting electrode 122 is constituted by a discharge wire 124. The discharge line 124 is suspended from the upper grid 121 and is disposed so as to penetrate the center inside of a predetermined “chamber” of the dust collecting electrode 122 in a substantially vertical direction. The discharge line 124 is connected to a weight 126 provided on the upper part of the lower grid 123 so as to have a tension that does not loosen.

  The suspension rod 2 is directly applied with a negative DC high voltage (charged voltage) supplied from a power supply device (not shown). On the other hand, the negative DC high voltage is applied to the discharge line 124 via the upper grid 121. In the present embodiment, the suspension rod 2 is joined to the upper grid 121 and arranged as a rod for suspending the suspension grid 2, while penetrating through the dust collection electrode chamber 200 and fulfilling the function as an electrode rod, A structure may be employed in which the lower grid 124123 is joined and further suspended.

  The upward spray nozzle 127 is disposed above the four corners of each “chamber” of the dust collecting electrode 122 and ejects the cleaning water flowing through the cleaning pipe 128 as a fine mist in a substantially vertical upward direction. Thereby, fine particles such as mist and dust adhering to the dust collecting electrode 122 can be cleaned and removed.

  In the electric dust collector 10, the cleaning water is ejected from the upward spray nozzle 127 as a fine mist in a substantially vertical upward direction. Thereby, since dispersion | distribution of washing water becomes good, the quantity of washing water used can be reduced from the quantity of water used conventionally. The upward spray nozzle 127 also contributes to an increase in the DC high voltage of the negative electrode applied to the suspension rod 2 and the discharge line 124.

<Gas seal structure>
The electric dust collector 10 is formed with a gas seal structure that blocks inflow of exhaust gas from the dust collecting electrode chamber 200 to the insulator chamber 100 by the penetrating insulator 1 to which a special structure for enhancing airtightness is given. It is characterized by.

  As described above, in the electrostatic precipitator 10, the dust collecting electrode chamber 200 and the insulator chamber 100 are arranged apart from each other or arranged adjacent to each other through a structure capable of blocking the airflow between the two chambers. Has been. The substantially cylindrical penetrating insulator 1 is fixed inside the insulator chamber 100, and a part of the lower end side is exposed to the outside (lower part) of the insulator chamber 100.

  Here, the conventional penetrating insulator has not been specially considered for its airtightness. For example, any gas seal as described above between the insulator chamber 100 and the dust collecting electrode chamber 200 can be used. Even if the structure exists, the penetrating insulator itself having a hollow structure sometimes becomes a gas flow path. More specifically, a fine gap around the hole through which the suspension rod 2 passes is the main gas flow path. On the other hand, in the electrostatic precipitator 10 of the present invention, the penetrating insulator 1 is characterized in that it has a structure that can sufficiently block such a gas flow.

[Penetration insulator and hanging rod]
As shown in FIG. 4, the penetrating insulator 1 covers at least the bottom surface side of the circular columnar main body 11 so as to block the gas flow at the perimeter of the through hole in which the suspension rod 2 is inserted. A donut-shaped washer 12B is fixed to the bottom surface of the penetrating insulator 1 by means of bolting or the like via a resin packing 13B.

  The washer 12 </ b> B and the packing 13 </ b> B are installed so as to surround the suspension rod 2 in such a manner that the inner edge thereof is in close contact with the outer edge of the suspension rod 2. As a result, the gas flow in this portion can be sufficiently blocked, and the gas sealing performance can be further enhanced by subjecting this portion to further known coking treatment.

  The washer 12 </ b> B is a donut-shaped metal member having an inner diameter substantially the same as the outer diameter of the suspension rod 2. For example, a general-purpose product can be used as it is if it is made of stainless steel and satisfies the above-mentioned conditions regarding the shape and size. The same applies to the packing 13, and a material made of silicon rubber or the like can be appropriately selected and used.

  Further, the washer 12B and the packing 13 can be preferably used in the form of being divided into two semicircular parts at the stage prior to installation on the penetrating insulator 1. Using such a two-divided configuration, the suspension rod 2 is sandwiched from the outside by each of these components, and then these components are joined to form and install a washer 12B. Also in the electric dust collector, the suspension rod 2 is temporarily removed from the penetrating insulator 1, or the gas seal structure of the present invention is additionally added without removing various members joined to the lower portion of the suspension rod 2. Can be granted. The “two semicircular parts” may be any member having a shape in which the washer 12B and the packing 13 laminated thereon are cut in half. In addition, in the present invention, as the washer and the packing, A member having a shape obtained by dividing a ring-shaped member capable of exhibiting a function along a center line in a plan view can be appropriately used.

  The fixing of the penetrating insulator 1 of the washer 12B that meets the packing 13B to the bottom surface of the main body 11 can be performed by fixing a plurality of locations of the washer 12B to the bottom surface of the main body 11 by bolting. Further, the washer 12B is fixed by a method in which a nut 15 is screwed to a rod-like bolt member 17 fixed to the top surface of the penetrating insulator 1 as shown in FIG. More preferred.

  Moreover, it is preferable that a donut-shaped washer 12A is fixed to the penetrating insulator 1 via a resin packing 13A on the top surface side as well as the bottom surface side. In this case, the same thing as the bottom side can be used about washer 12B and resin packing 13B. These fixing methods are the same as those on the bottom surface side, but a screw structure is formed in the vicinity of the upper end portion of the suspension rod 2 for the washer 12A on the top surface side and the resin packing 13A as shown in FIG. However, a structure in which the nut 14 is directly screwed to the portion may be employed. The caulking process and the like are the same as those on the bottom side.

  As shown in FIG. 3, the penetrating insulator 1 fixes the flange portion 16 protruding outward from the outer edge of the main body 11 around the fixing hole that penetrates the penetrating insulator main body on the bottom surface of the insulator chamber 100. Thus, a part of the main body 11 on the lower end side with respect to the flange portion 16 is fixed in the insulator chamber 100 in such a manner that it is inserted into the dust collecting electrode chamber 200. A gas sealing process such as a caulking process is preferably performed around the hole into which the main body 11 of the penetrating insulator 1 is inserted.

  As shown in FIGS. 3 and 4, the suspension rod 2 is supported by the penetrating insulator 1 in a manner of passing through the central axis of the circular penetrating insulator 1.

[Effect of gas seal structure in electric dust collector]
As described above, the electric dust collector 10 improves the airtightness of the joint portion between the penetrating insulator 1 and the suspension rod 2, thereby allowing the gas flow through the cavity inside the insulator, which has been overlooked in the conventional electric dust collector. Can be cut off.

  The present invention is a gas seal means widely applicable to electrostatic dust collection having a structure in which a dust collection electrode is supported by an insulator and hangs down. In these electric dust collectors, various conventional gas sealing means implemented without using the insulator as a constituent element and the gas sealing means of the present invention are appropriately combined as necessary to perform conventional operations. The gas seal performance for preventing the inflow of exhaust gas into the insulator chamber 100 in these electric dust collectors can be remarkably improved by supplementing the disadvantages of the gas seal means.

1 Through insulator 11 Main body (Main body of through insulator)
12 (12A, 12B) Washer 13 (13A, 13B) Packing 14, 15 Nut 16 Flange 17 Bolt member 2 Suspension rod 10 Electric dust collector 111 Upper casing 113 Lower casing 114 Frame 121 Upper grid 122 Dust collecting electrode 123 Lower grid 124 Releasing Electric wire 126 Weight 127 Upward spray nozzle 128 Cleaning pipe 129 Downward spray nozzle 100 Insulator chamber 200 Dust collecting electrode chamber

Claims (4)

A dust collection chamber containing the dust collection electrode;
An insulator chamber disposed above the dust collecting electrode chamber;
A substantially cylindrical penetrating insulator which is fixed to the insulator chamber and a part of the lower end side of the insulator chamber is exposed to the outside;
One end is supported by the penetrating insulator, and the other end is a rod-shaped suspension rod inserted into the dust collecting electrode chamber;
An electric dust collector comprising:
The dust collecting electrode chamber and the insulator chamber are arranged apart from each other, or are arranged adjacent to each other through a structure capable of blocking the airflow between the two chambers,
The suspension rod is supported by the penetrating insulator in a mode of penetrating the penetrating insulator,
The penetrating insulator has a donut-shaped washer having an inner diameter substantially the same as the outer diameter of the suspension rod, and the washer and the packing of the packing via a resin packing having the same shape as the washer in plan view. An electric dust collector, wherein an inner edge is closely attached to an outer edge of the suspension rod, and is fixed to a bottom surface of the penetrating insulator.   2. The electric dust collector according to claim 1, wherein the washer on the bottom surface side is fixed to a top surface of the penetrating insulator and screwed to a plurality of rod-like bolt members that are suspended inside the penetrating insulator.   The electric dust collector according to claim 1 or 2, wherein the washer on the bottom surface side is formed by joining two semicircular parts in a manner of sandwiching the suspension rod.   In the penetrating insulator, a washer having an inner diameter that is substantially the same as the outer diameter of the suspension rod is connected to the washer and the inner edge of the packing through a resin packing that is substantially the same shape as the washer in plan view. The electrostatic precipitator according to any one of claims 1 to 3, wherein the electrostatic precipitator is fixed on the top surface of the penetrating insulator in close contact with the outer edge of the suspension rod.

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