JP2014172006A - Mobile electrode type electric dust collector - Google Patents

Abstract

An object of the present invention is to provide a moving electrode type electrostatic precipitator in which an electrode plate and an upper shaft can move without interfering with each other without using a new rotation transmission mechanism in addition to an upper sprocket wheel.
An endless chain rotatably supported by upper and lower sprocket wheels, and a plurality of electrode plates that integrally move with the endless chain and move around a discharge electrode in a fixed direction. The plurality of electrode plates are rotatably attached at positions higher than the center of gravity at the tip of the provided rod-shaped electrode plate support arm.
[Selection] Figure 1

Description

  The present invention relates to a dust collecting electrode of an electric dust collector, and in particular, a moving electrode type electrostatic dust collector configured such that a plurality of electrode plates connected to an endless chain move around a discharge electrode. Concerning the dust electrode.

  As shown in FIG. 6, the moving electrode type electrostatic precipitator 1 charges dust with a high voltage applied between both electrodes while the electrode plate 10 constituting the dust collecting electrode moves in the vertical direction and circulates the discharge electrode. In this structure, dust is collected on the dust collecting electrode, and dust is removed by a brush installed under the dust collecting electrode. Compared with a hitting method performed in a general fixed electrode type electrostatic precipitator, there is less dust separation failure and re-scattering of dust to the downstream, and high dust collection performance can be exhibited. However, since a drive device for moving the electrode plate 10 is provided and a robust structure is required for the electrode plate for the following reasons, a simpler and less expensive structure is required.

  The dust collection electrode has a structure in which a plurality of electrode plates that are long in the horizontal direction are arranged in the vertical direction, suspended around two endless chains installed at both ends (left and right ends) of the electrode, and moved around in a caterpillar shape. , Sprocket wheels are arranged on the upper and lower ends, and the electrode plate is reversed along the circumference of the sprocket wheel. During this reversal, the electrode plate is in a horizontal posture, and is bent and deformed by the weight of the electrode plate and the attached dust.

  For this reason, Patent Document 1 adopts a frame reinforced with a cross section of a hollow box or a hollow strength member so that the electrode plate does not cause plastic deformation and buckling. However, such a configuration has a problem that it takes time to manufacture and increases the cost of the apparatus.

  Moreover, in patent document 2 and patent document 3, in order to avoid the inversion operation | movement of the above electrode plates, it shows in FIG. 7 as a method of making a circular movement, keeping the vertical attitude | position of the electrode plate which comprises a dust collecting pole. Thus, a structure is disclosed in which the electrode plate 10 is suspended around an endless chain by a pin or shaft 13 at a position higher than the left and right upper ends of the electrode plate 10 or at a position higher than the center of gravity. In this case, if the upper shaft is arranged so as to connect both the left and right sprocket wheels 20 on the upper side, the suspended electrode plate and the upper shaft interfere and collide, so the left and right sprocket wheels have a cantilever structure. In addition to eliminating the upper shaft that connects the left and right sprocket wheels, a new rotating shaft is provided above the left and right sprocket wheels, and a mechanism for transmitting the rotation to each sprocket wheel is newly added. For this reason, an upper space for accommodating the rotation transmission mechanism is required, and the number of parts is increased, resulting in an increase in the cost of the apparatus.

JP-A-10-230187 JP-A-55-73359 JP 2007-117982

  In order to avoid an increase in cost due to the configurations described in Patent Documents 1 to 3, the present invention moves without the interference between the electrode plate and the upper shaft without using a new rotation transmission mechanism in addition to the upper sprocket wheel. It is an object of the present invention to provide a movable electrode type electrostatic precipitator.

  In order to solve the above-mentioned problems, a moving electrode type electrostatic precipitator according to the present invention includes an endless chain rotatably supported by upper and lower sprocket wheels, and an endless chain integrally with the endless chain in a certain direction. A plurality of electrode plates that circulate, and at the tip of a rod-shaped electrode plate support arm provided in the endless chain, the plurality of electrode plates are each rotatably mounted at a position higher than the center of gravity. It was. Thereby, the electrode plate is lifted above the upper shaft by the electrode plate support arm while maintaining the posture of the electrode plate in the vertical direction when passing through the upper sprocket wheel, and moves while avoiding the upper shaft. Interference between the electrode plate and the upper shaft can be avoided.

  In the moving electrode type electrostatic precipitator according to the present invention, the electrode plate has a reinforcing electrode plate upper frame on the upper end of one steel plate having a long rectangular shape and upper portions of both left and right ends. did. Thereby, it becomes possible to ensure sufficient rigidity so as not to be deformed even by the wind pressure due to the exhaust gas flow or the pressing of the dust peeling brush.

  In the moving electrode type electrostatic precipitator according to the present invention, the center of gravity of the electrode plate is adjusted while reinforcing the rigidity of the electrode plate at the lower end of one steel plate having a long rectangular shape. The electrode plate has a lower frame. As a result, sufficient rigidity is ensured not to be deformed even by wind pressure due to exhaust gas flow or pressing of a dust peeling brush, and the coupling position of the electrode plate and the electrode plate support arm, that is, the length selection of the electrode support arm is selected. And the strength of the electrode support arm can be increased.

  According to the moving electrode type electrostatic precipitator having the above-described characteristics, the manufacturing cost of the moving electrode type electrostatic precipitator can be reduced by having a dust collecting electrode structure that is lightweight and secures the necessary rigidity. .

The side view which shows typically the dust collection electrode of Example 1 of this invention. The side view which shows the electrode plate of Example 1 of this invention. The front view which shows the electrode plate of Example 1 of this invention. The side view which shows the electrode plate of Example 2 of this invention. The front view which shows the electrode plate of Example 2 of this invention. The conceptual diagram which shows the internal structure of a conventional apparatus. The side view which shows the conventional dust collection electrode typically.

  FIG. 1 is a side view schematically showing one lane of a dust collecting electrode and a discharge electrode according to Example 1 of the present invention. The actual apparatus has several tens of lanes arranged in parallel according to the exhaust gas treatment amount. An endless chain 2 rotatably supported by upper and lower sprocket wheels 20, 21 is stretched around the discharge electrode 30, and a plurality of electrode plates 10 are passed through the electrode plate support arm 11 to the endless chain 2. It is attached. The electrode plate 10 and the electrode plate support arm 11 are rotatably mounted on a shaft 13 provided at a position above the center of gravity of the electrode plate 10, so that the electrode plate 10 always maintains a posture in the vertical direction. be able to.

  The endless chain 2 and the electrode plate 10 rotate and move as indicated by the arrows in the figure, and dust attached to the electrode plate 10 is scraped off by the brush 6 disposed at the lower part of the dust collecting electrode and is deposited on the lower hopper. . When the electrode plate 10 passes through the upper sprocket wheel 20, the electrode plate support arm 11 moves while maintaining the posture in the circumferential tangent direction of the upper sprocket wheel 20, so that the electrode plate 10 is lifted by the electrode plate support arm 11. In this state, it passes over the upper shaft 22 that connects the left and right upper sprockets 20, so that interference / collision between the electrode plate 10 and the upper shaft 22 can be avoided.

  In order to prevent the electrode plate 10 from vibrating due to wind pressure due to the flow of exhaust gas, sparks between the discharge electrode and the dust collecting electrode, etc., when the electrode plate 10 vibrates, it touches both the left and right ends of the electrode plate 10. As described above, the rod-shaped guide 27 for suppressing the amplitude of the electrode plate 10 from being increased is disposed at a position facing the left and right end portions of the electrode plate 10.

2 and 3 are a side view and a front view showing details of the electrode plate 10 of the first embodiment.
The electrode plate 10 has a configuration in which an electrode plate upper frame 14 is provided and reinforced so that the upper end portion and the upper portion of the left and right end portions of one long steel plate are rimmed. As described above, the shaft 13 is provided on the electrode plate frame 14 above the center of gravity of the electrode plate 10, and is rotatably coupled in the hole provided at one end of the electrode plate support arm 11. The electrode plate support arm 11 is joined to the endless chain 2 by welding at an arm fixing portion 24 at one end thereof.

  According to this configuration, the edge portion 14 of the electrode plate 10 improves the mechanical strength of the electrode plate 10 so that the electrode plate 10 penetrates into the gap between the wind pressure caused by the exhaust gas flow and the brush 6 installed under the dust collecting electrode. There is an effect of preventing deformation due to the pressing of the brush 6 when performing.

4 and 5 are a side view and a front view showing details of the electrode plate 10 of the second embodiment.
The electrode plate 10 has a structure in which an electrode plate lower frame 16 is provided and reinforced so that the lower end portion of a long rectangular steel plate is edged, and the center of gravity of the electrode plate 10 is lowered by its weight. Yes.

  According to this configuration, the edge portion 16 at the lower end of the electrode plate 10 improves the mechanical strength for maintaining the flat surface of the electrode plate 10, and is effective in preventing deformation due to wind pressure or brush pressing due to the exhaust gas flow. Since the center of gravity of the electrode plate 10 is lowered by the weight of the electrode plate lower frame 16 and the coupling position of the electrode plate 10 and the electrode plate support arm 11 can be set downward, the electrode plate support arm 11 can be shortened. The strength of the electrode plate support arm itself can be improved.

DESCRIPTION OF SYMBOLS 1 ......... Moving electrode type electrostatic precipitator, 2 ......... Endless chain, 6 ......... Brush, 10 ...... Electrode plate, 11 ...... Electrode plate support arm, 12 ...... Internal frame material, 13 ......... Shaft, 14 ......... Electrode plate upper frame, 15 ......... Ring-shaped member, 16 ......... Electrode plate lower frame, 20 ......... Upper sprocket wheel, 21 ......... Lower sprocket wheel, 22 ... ... upper shaft, 23 ... lower shaft, 24 ... arm fixing part, 25 ... arm connecting plate, 26 ... bolt, 27 ... guide, 30 ... discharge electrode, 40 ... Transmission chain, 50 ......... casing, 51 ......... hopper, 52 ......... inlet flue, 53 ...... exit flue, 54 ...... exhaust gas, 55 ...... dust outlet, 56 ......... insulator , 57 ……… Discharge electrode support.

Claims (3)

In a moving electrode type electrostatic precipitator having an endless chain rotatably supported by upper and lower sprocket wheels, and a plurality of electrode plates that move around the discharge electrode in a fixed direction integrally with the endless chain, The endless chain has a plurality of rod-shaped electrode plate support arms, and the plurality of electrode plates are rotatably mounted at positions higher than the center of gravity at the tip of the electrode plate support arm. A moving electrode type electrostatic precipitator. 2. The moving electrode type electrostatic precipitator according to claim 1, wherein the electrode plate is configured by providing an electrode plate upper frame on upper ends of left and right end portions of one long steel plate having a long rectangular shape. apparatus. The moving electrode type electrostatic precipitator according to claim 1 or 2, wherein the electrode plate is configured by providing an electrode plate lower frame at a lower end portion of a long rectangular steel plate.

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