JP2016059861A - Electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform maintenance of washing means and an electrode plate of an electric dust collector easily, and to maintain high collection performance for a long time.SOLUTION: An electric dust collector body 1 which includes washing means 11 is configured in such a manner that a top plate portion 9 of the body 1 and the washing means 11 are integrated, and according to opening/closing of the top plate portion 9, the washing means 11 is also movable, so that an operator can face a jetting part 17 of a washing nozzle 14 just by opening the top plate portion 9 and can easily confirm dirt and clogging. Also, maintenance of the washing means 11 can be performed easily. Furthermore, the washing means 11 is separated from above an electrode plate just by opening the top plate portion 9, so that the operator can observe charging means 3 and dust collection means 4 from directly above without an obstacle, and maintenance also becomes possible.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electrostatic precipitator that is used when purifying contaminated air, in particular, with respect to an electrode plate that is cleaned by spraying cleaning water from above with a cleaning nozzle. This relates to a clog that can be easily checked and maintained.

  Conventionally, this type of electrostatic precipitator is one in which the electrode plate is cleaned by washing water sprayed from a large number of cleaning nozzles provided above the electrode plate so that the electrostatic precipitator can be used for a long time. Is known (see, for example, Patent Documents 1 and 2).

  FIG. 10 shows a conventional cleaning device for a dry electrostatic precipitator described in Patent Document 1. In FIG. In FIG. 10, a cleaning nozzle 102 for cleaning the electrode plate is provided inside the dry electric dust collector 101 on the upper part and the side part of the dry electric dust collector 101 (in particular, a number of cleaning nozzles are arranged on the upper part) to clean the electrode plate. It was configured to enable long-term use.

JP-A-10-165840 JP 2002-119889 A

  In such an electrostatic precipitator with a conventional cleaning nozzle, the cleaning nozzle is located inside the electrostatic precipitator, and the ejection part is disposed toward the electrode plate. It is difficult for the operator to check particle contamination and nozzle clogging from the outside, the number of cleaning nozzles is enormous, maintenance is very difficult, and the cleaning performance of the electrode plate is deteriorated by overlooking the cleaning nozzle clogging. There was a possibility of causing a decrease in the collection performance.

  The present invention solves the above-described conventional problems, and can easily check the clogging of the cleaning nozzle when observing the charging unit and the dust collecting unit from above, and the cleaning performance is deteriorated and trapped due to the defective cleaning nozzle. An object of the present invention is to provide an electrostatic precipitator that does not cause a decrease in collecting performance.

  In order to achieve this object, the present invention provides a charging means composed of a discharge electrode and a ground electrode and a dust collecting means composed of a load electrode plate and a dust collecting electrode plate in order from the windward side in the horizontal direction. A main body disposed; a top plate portion configured to be openable and closable around one side at an upper portion of the main body; and a cleaning means disposed on the back surface of the top plate portion to wash the surfaces of the load electrode plate and the dust collecting electrode plate And a transport pipe for transporting water from the main body side to the washing means, wherein the washing means injects water onto the surface of the load electrode plate and the dust collecting electrode plate facing each other, and A branch pipe that supplies water to the cleaning nozzle and a main pipe that distributes water to the branch pipe are connected to the transport pipe through a joint so as to be able to rotate and open and close the top plate portion. Along with this, the cleaning means is also configured to rotate. It is intended to achieve the objective.

  According to a first aspect of the present invention, there is provided an electrostatic precipitator according to the present invention, comprising: a charging means comprising a discharge electrode and a ground electrode; and a dust collecting means comprising a load electrode plate and a dust collecting electrode plate in order from the windward side in the horizontal direction. A main body disposed; a top plate portion configured to be openable and closable around one side at an upper portion of the main body; and a cleaning means disposed on the back surface of the top plate portion to wash the surfaces of the load electrode plate and the dust collecting electrode plate And a transport pipe for transporting water from the main body side to the washing means, the washing means, a plurality of washing nozzles for injecting water onto the surface of the opposed load electrode plate and the dust collecting electrode plate, A branch pipe for supplying water to the cleaning nozzle; and a main pipe for distributing water to the branch pipe, the main pipe being pivotally connected to the transport pipe via a joint, and opening and closing the top plate portion. Accordingly, the cleaning means also rotates.

  As a result, the top plate portion of the electrostatic precipitator and the cleaning means are integrated so that the cleaning means can move as the top plate portion opens and closes, so that the operator can open the cleaning nozzle only by opening the top plate portion. It is possible to face the jetting part and easily check for dirt and clogging of the cleaning nozzle. In addition, the cleaning means can be easily maintained. Moreover, since the branch pipe and the cleaning nozzle are separated from above the charging means and the dust collecting means simply by opening the top plate portion, the operator can observe the charging means and the dust collecting means without any obstacles from directly above, and the electrode plate Maintenance will also be possible. In other words, the cleaning, charging and dust collection means and many parts can be maintained just by opening the top plate, preventing the collection performance from deteriorating due to accumulation of dirt, and maintaining the high collection performance. Play.

Configuration diagram of electric dust collector of the present invention Configuration enlarged view of the cleaning means of the embodiment of the present invention Rotation block diagram of cleaning means according to an embodiment of the present invention The figure which closed the top-plate part of embodiment of this invention The figure which opened the top-plate part of embodiment of this invention Configuration diagram of a cleaning nozzle characteristic for clogging according to an embodiment of the present invention The figure which opened the washing | cleaning means and the top plate part which have the washing nozzle characterized by clogging of embodiment of this invention Configuration diagram of connection parts characteristic for clogging of embodiments of the present invention The figure which opened the washing | cleaning means and the top plate part which have the connection components with the characteristic with respect to clogging of embodiment of this invention Configuration diagram of a conventional dry electrostatic precipitator cleaning device

  The electrostatic precipitator according to claim 1 of the present invention comprises, in order from the windward side in the horizontal direction, a charging means constituted by an electric electrode and a ground electrode, and a dust collecting means constituted by a load electrode plate and a dust collecting electrode plate. A main body disposed; a top plate portion configured to be openable and closable around one side at an upper portion of the main body; and a cleaning means disposed on the back surface of the top plate portion to wash the surfaces of the load electrode plate and the dust collecting electrode plate And a transport pipe for transporting water from the main body side to the washing means, the washing means, a plurality of washing nozzles for injecting water onto the surface of the opposed load electrode plate and the dust collecting electrode plate, A branch pipe for supplying water to the cleaning nozzle; and a main pipe for distributing water to the branch pipe, the main pipe being pivotally connected to the transport pipe via a joint, and opening and closing the top plate portion. Accordingly, the cleaning means also rotates.

  As a result, the top plate portion of the electrostatic precipitator and the cleaning means are integrated so that the cleaning means can move as the top plate portion opens and closes, so that the operator can open the cleaning nozzle only by opening the top plate portion. It is possible to face the jetting part and easily check for dirt and clogging of the cleaning nozzle. In addition, the cleaning means can be easily maintained. Furthermore, since the branch pipe and the cleaning nozzle are separated from above the charging means and the dust collecting means just by opening the top plate, the operator can observe the charging means and the dust collecting means without any obstacles from directly above, and maintenance of the electrode plate You will also be able to. In other words, the cleaning, charging and dust collection means and many parts can be maintained just by opening the top plate, preventing the collection performance from deteriorating due to accumulation of dirt, and maintaining the high collection performance. Play.

  Further, the cleaning nozzle according to claim 2 of the present invention includes a jet part, a side part, and a screw part, and a flow path extending from the flow path to the spray part to the outside of the side part is provided inside the side part. Further, it has a piston that moves outward due to an increase in pressure inside the cleaning nozzle and protrudes outward from the side surface of the cleaning nozzle.

  As a result, if the cleaning nozzle is clogged, the tip of the piston protrudes to the outside of the side surface of the cleaning nozzle due to the pressure increase inside the cleaning nozzle, so the operator simply opens the top plate and observes the cleaning nozzle from the front. Can confirm the protrusion on the side surface, and can easily determine the clogging of the cleaning nozzle.

  Further, the cleaning means according to claim 3 of the present invention has a configuration in which a connecting part that allows the inside to be visually observed is provided between the cleaning nozzle and the branch pipe.

  Thereby, when clogging occurs in the cleaning nozzle, the cleaning water remains inside the cleaning nozzle and the connecting parts after stopping the spraying of the cleaning water. That is, the operator can easily determine that the cleaning nozzle is clogged simply by opening the top plate and confirming the remaining cleaning water from the front of the connecting portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the main body 1 of the electrostatic precipitator is box-shaped and has ducts 2 connected to the opposing surfaces, and the charging means 3 and the dust collecting means 4 are blown horizontally in the air path connecting the ducts 2. Arranged in order from the top. The charging means 3 is composed of a discharge electrode 5 and a ground electrode 6, and the dust collecting means 4 is composed of a load electrode plate 7 and a dust collection electrode plate 8, and the discharge electrode 5, the ground electrode 6 and the load electrode plate 7 The dust collecting electrode plate 8 has a structure in which the dust collecting electrode plates 8 are alternately arranged with a predetermined interval. The discharge electrode 5, the ground electrode 6, the load electrode plate 7, and the dust collecting electrode plate 8 are made of a conductive metal, preferably SUS. The top plate portion 9 of the main body 1 of the electric dust collector has a structure that can be opened and closed (from the front) about an opening / closing movable part 10 (for example, a hinge) as an axis (back).

  Further, on the back surface of the top plate portion 9 above the charging means 3 and the dust collecting means 4, a cleaning means 11 for washing the opposing surfaces of the discharge electrode 5 and the ground electrode 6 and the load electrode plate 7 and the dust collecting electrode plate 8 is provided. ing.

  Further, in FIG. 2, the structure of the cleaning means 11 will be described in detail. The cleaning means 11 includes a plurality of cleaning nozzles 14 for injecting water onto the surfaces of the opposing load electrode plate 7 and the dust collecting electrode plate 8, a branch pipe 13 for supplying water to the cleaning nozzle 14, and water to the branch pipe 13. A main pipe 12 for distributing water and a transport pipe 18 are provided. The cleaning nozzle 14 includes a screw portion 15 connected to the branch pipe 13, a side surface portion 16, and an ejection portion 17 for spraying cleaning water, and is made of resin or metal, preferably SUS.

  As shown in FIG. 3, the main pipe 12 is connected to the transport pipe 18 on the main body side via a joint 19. The joint 19 has a structure in which the main pipe 12 rotates with respect to the transport pipe 18. The main pipe 12 is fixed at a position where it can be rotated simultaneously with opening and closing of the top plate portion 9, and the branch pipe 13 is perpendicular to the discharge electrode 5, the ground electrode 6, the load electrode plate 7, and the dust collecting electrode plate 8 from the main pipe 12. The cleaning nozzle 14 has a structure integrated with the branch pipe 13. In other words, the branch pipe 13 is disposed so as to cross over the discharge electrode 5, the ground electrode 6, the load electrode plate 7, and the dust collection electrode plate 8.

  When the top plate portion 9 is closed as shown in FIG. 4 (when the electrostatic precipitator collects, cleans and dries), the branch pipe 13 is connected to the discharge electrode 5, the ground electrode 6 and the load electrode plate. 7 and the dust collecting electrode plate 8 are vertically and horizontally oriented, the cleaning nozzle 14 is vertically downward, and the ejection portion 17 is arranged to face the electrode plate side. Further, when the top plate portion 9 is opened as shown in FIG. 5 (maintenance), the main pipe 12 is also rotated at the joint 19 portion along with the opening / closing movable part 10, and the branch pipe 13 is rotated around the main pipe 12. It moves along with the movement and becomes vertically upward. In this way, when the openable / closable component 10 and the main pipe 12 are arranged on the back side, the ejection portion 17 of the cleaning nozzle 14 can be arranged to face toward the front side as the branch pipe 13 moves.

  In the above configuration, a voltage is applied to the charging means 3 and the dust collecting means 4 during electrostatic dust collection, and contaminated air is caused to flow from the duct 2 into the main body 1 by a blower. The inflowing contaminated air is charged with particles in the contaminated air by corona discharge from the discharge electrode 5 of the charging means 3. Thereafter, the charged particles move in the electric field space between the load electrode plate 7 and the dust collection electrode plate 8 of the dust collecting means 4 in the electrode plate direction and adhere to the dust collection electrode plate 8. In this way, the contaminated air is cleaned by the particles adhering to the dust collecting electrode plate 8. While the dust is collected, the jet of cleaning water from the cleaning nozzle 14 is stopped. On the other hand, when the particles collected and deposited on the dust collecting electrode plate 8 are washed, voltage application and ventilation to the charging means 3 and the dust collecting means 4 are stopped, and the branch pipe 13 passes through the main pipe 12 on the top plate portion side. By spraying the cleaning water transported to the cleaning nozzle 14 from the cleaning nozzle 14, the cleaning water is flowed onto the dust collecting electrode plate 8 to remove the accumulated particle dirt. The discharge electrode 5, the ground electrode 6, and the load electrode plate 7 can be cleaned by the same cleaning method. Thereafter, the washing water from the washing nozzle 14 is stopped, and air is blown and dried to remove dirt adhered to the electrode plate, and dust can be collected again. In general, when particle dirt accumulates between the electrode plates of the discharge electrode 5 and the ground electrode 6, the deposit becomes a resistance and corona discharge is weakened. Moreover, if particle dirt accumulates between the electrode plates of the load electrode plate 7 and the dust collecting electrode plate 8, a voltage drop occurs between the electrode plates, and the collection performance deteriorates due to a decrease in electric field strength or re-scattering of the collected particles. However, it is possible to prevent the collection performance from being lowered by cleaning the electrode plate.

  In general, when a cycle of dust collection, cleaning and drying is performed for a long time, the cleaning nozzle 14 repeatedly injects and stops the cleaning water, and the salt contained in the cleaning water may be deposited as a scale. . In addition, nozzle clogging may occur due to coarse particles flowing with the supply of cleaning water or particles flowing from the ejection portion 17 during dust collection. Therefore, regular maintenance of the cleaning nozzle 14 is required.

  As shown in FIG. 5, the top plate portion 9 and the cleaning means 11 of the main body 1 are integrated, and the cleaning means 11 is movable as the top plate portion 9 is opened and closed. By simply opening it, it is possible to face the ejection portion 17 of the cleaning nozzle 14, and the cleaning nozzle 14 can be easily checked for contamination and clogging. Also, the cleaning means 11 can be easily maintained. Further, since the branch pipe 13 and the cleaning nozzle 14 are separated from above the charging means 3 and the dust collecting means 4 simply by opening the top plate portion 9, the operator can remove the charging means 3 and the dust collecting means 4 from above without any obstacles. It can be observed and the electrode plate can be maintained.

  Further, as shown in FIG. 6, a flow path 21 extending from the flow path 20 to the ejection part to the outside of the side face is provided inside the side face 16 of the cleaning nozzle 14, and the pressure inside the cleaning nozzle 14 is increased beyond that. Piston 22 that moves outward and protrudes outward from the side surface (for example, a thin runner or protrusion that breaks above a certain pressure value is bonded or fixed to the piston, or a polymer that contracts above a certain pressure value from the piston. A cleaning nozzle 14 having an outer side) is used. Accordingly, when the cleaning nozzle 14 is clogged as shown in FIG. 7, the tip of the piston 22 protrudes to the outside of the side surface portion 16 of the cleaning nozzle 14 due to an increase in pressure inside the cleaning nozzle 14, so that the operator can The projection of the piston 22 can be confirmed simply by opening the nozzle and observing the cleaning nozzle 14 from the front, and clogging of the cleaning nozzle 14 can be easily determined.

  Further, as shown in FIG. 8, there is provided a cleaning means 11 provided with a connecting part 23 made of a transparent resin between the cleaning nozzle 14 and the branch pipe 13, and capable of checking the inside between the cleaning nozzle 14 and the branch pipe 13. Use. At this time, when the cleaning nozzle 14 is clogged by being stopped at a position having an angle θ from the vertical direction as shown in FIG. Wash water remains. That is, the operator can easily determine the clogging of the cleaning nozzle 14 simply by opening the top plate portion 9 and observing the connection component 23.

  In the present invention, the main pipe on the top plate portion side of the cleaning means has a structure that rotates according to the opening and closing of the top plate portion with a rotating joint, and the branch pipe and the cleaning nozzle are integrated with the top plate portion, The cleaning means is also configured to open and close as the top plate is opened and closed. In the electrostatic precipitator used to purify contaminated air, the cleaning means and the electrode plate can be easily maintained. This is useful.

DESCRIPTION OF SYMBOLS 1 Main body 2 Duct 3 Charging means 4 Dust collection means 5 Discharge electrode 6 Ground electrode 7 Load electrode plate 8 Dust collection electrode plate 9 Top plate part 10 Opening and closing movable part 11 Cleaning means 12 Main piping 13 Branch piping 14 Cleaning nozzle 15 Screw part 16 Side part 17 Spout part 18 Transport pipe 19 Joint 20 Flow path 21 to spout part Flow path 22 extending to the outside of the side part Piston 23 Connection part 101 Dry type electrostatic precipitator 102 Cleaning nozzle

Claims (3)

A main body in which a charging means composed of a power electrode and a ground electrode, and a dust collecting means composed of a load electrode plate and a dust collecting electrode plate are arranged in order from the windward side in the horizontal direction, and one side is an axis at the top of the main body A top plate part configured to be openable and closable, a cleaning unit arranged on the back surface of the top plate part to wash the surfaces of the load electrode plate and the dust collecting electrode plate, and transporting water from the main body side to the cleaning unit A transport pipe, wherein the cleaning means includes a plurality of cleaning nozzles for injecting water onto the opposite surfaces of the load electrode plate and the dust collecting electrode plate, a branch pipe for supplying water to the cleaning nozzle, and the branch pipe An electrostatic precipitator comprising a main pipe for distributing water, wherein the main pipe is rotatably connected to the transport pipe via a joint, and the cleaning means is also rotated as the top plate is opened and closed. The cleaning nozzle is composed of an ejection portion, a side surface portion, and a screw portion, and a flow path extending from the flow path to the ejection portion to the outside of the side surface portion is provided inside the side surface portion, and the pressure inside the cleaning nozzle is increased beyond that. The electrostatic precipitator according to claim 1, further comprising: a washing nozzle having a piston that moves outward by the nozzle and protrudes outward from the side surface of the washing nozzle. 2. The electrostatic precipitator according to claim 1, further comprising a cleaning means having a configuration in which a connecting part for visually observing the inside is provided between the cleaning nozzle and the branch pipe.

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