JPWO2018083967A1 - Electric dust collector - Google Patents

Abstract

The electric dust collector (1) collects dust from a dust-containing air flow (P) in which dust collecting electrode plates (2) and charged electrode plates (9) are alternately arranged between side plates (11, 12). The electrode unit (10) is accommodated. The electrode unit (10) includes a charge shaft (18) that holds the charged electrode plate (9) in a suspended state at the top thereof. The charge shaft (18) is supported in an electrically insulated state with respect to the side plates (11, 12) by an insulating member (15) fixed at an upper position of the side plates (11, 12). By opening the openable and closable ceiling door (31) provided in the housing (4) of the electrostatic precipitator (1), an operator opens the insulating member (15) positioned at the upper part of the electrode unit (10) ( It is possible to clean directly from 36).

Description

  The present invention relates to an electrostatic precipitator that collects particles charged by corona discharge by the action of Coulomb force, and in particular, oil mist, oil smoke, etc. generated by metal processing using dust, fume, cutting oil, etc. generated in factories, etc. The present invention relates to an electric dust collector that collects (hereinafter collectively referred to as “dust”).

  A dust collector that sucks dust with a very fine particle size and keeps the air in the factory clean is charged by corona discharge generated from the charged electrode to the dust and charged, and the counter electrode is used using Coulomb force. There is an electrostatic precipitator that attracts and collects dust to the dust collecting electrode. When trying to collect very fine dust with a filter, a high-performance filter (such as a HEPA filter) is required, but such a filter quickly clogs and must be replaced frequently. The electrostatic precipitator is very advantageous from the viewpoint of running cost.

  However, the electrostatic precipitator is in a state where dust from the dust collecting electrode tends to scatter when it adheres to the dust collecting electrode and loses electric charge, and abnormal discharge occurs when the dust approaches the charged electrode plate. It becomes easy to wake up, and the collection efficiency gradually decreases. For this reason, the maintenance which removes regularly the dust deposited on the dust collection electrode is indispensable. In particular, dust with high viscosity such as fume, oil mist, and oil smoke needs to disassemble the device and clean the dust collecting electrode part, and maintenance requires a great deal of labor, time and expertise.

  Therefore, for example, in the electrostatic precipitator disclosed in Patent Document 1, a charged electrode part is provided on the upstream side, and a dust collecting electrode part is provided on the downstream side, and each electrode part is unitized so that the electrode can be easily taken out from the apparatus. It has become. Moreover, the dust collecting electrode of each electrode part is rotating at a rotational speed of about once per minute, and the dust attached to the dust collecting electrode is an annular band arranged so as to be in contact with the dust collecting electrode. The body is scraped off. In the case of an electric dust collector having this scraping-type dust collecting electrode (hereinafter referred to as “scraping-type electric dust collector”), the frequency of cleaning the dust collecting electrode can be lowered to a certain degree.

  Normally, since a high voltage is applied to the charged electrodes in the electrostatic precipitator, when dust collecting electrodes are fixed, or when rotating slowly as in Patent Document 1, if dust accumulates, the distance between the electrodes It is easy to get a spark. When sparks occur continuously, the machine is forced to stop in consideration of the danger of fire and the like.

  On the other hand, Patent Document 2 discloses an electric dust collector in which the rotational speed of a dust collecting electrode is increased. In this electrostatic precipitator, the dust collecting electrode is rotated at a rotational speed of about 200 times per minute (hereinafter, this electrostatic precipitator is referred to as “high-speed rotating electrostatic precipitator”). It is cut off immediately, making it difficult for continuous sparks to occur. Therefore, a high voltage can be stably applied, and the discharge amount can be maintained, so that the collection efficiency is increased.

  In addition, since the dust collection electrode rotates at a high speed, the dust is shaken off by centrifugal force, so that it is difficult for the dust to accumulate on the dust collection electrode, and the frequency of cleaning can be reduced.

  Furthermore, in a high-speed rotary electrostatic precipitator, water or a detergent may be sprayed from a nozzle or the like provided in the apparatus to clean the dust collecting electrode. The high-speed rotating electrostatic precipitator can wash out water and detergent by centrifugal force due to high-speed rotation, so it has the merit that it can dry quickly and the operation stop time can be shortened. Yes.

JP 2009-262007 A JP 2008-142670 A

  In the scraping-type electrostatic precipitator of Patent Document 1, since the electrode unit is unitized, it is easy to take out the electrode unit from the housing, but a notch is provided in the fixed electrode plate which is a charged electrode, and the collector is further collected. The structure of the unit itself must be complicated because it is necessary to provide each of the dust electrode plates so that the annular band contacts each other. In addition, since the charged electrode is partially cut from the center to the outer periphery, there is a demerit that the area where the repulsive force works with the dust collecting electrode is reduced and the collection efficiency is lowered.

  In addition, a high voltage (+/− several thousand volts or more) is applied to the fixed charged electrode plate, and in order to separate this from the ground voltage, the charged electrode plate is placed inside the casing via an insulator which is an insulating member. Has been placed. If dust accumulates on this insulator, there is a risk of sparking and a fire, so a scraping-type electrostatic precipitator is a cam that uses gentle rotation of the dust collector electrode to prevent dust from accumulating on the insulator. The type of scraping means is provided, and the structure of the electrode unit is further complicated.

  The scraping type electrostatic precipitator can reduce the frequency of cleaning maintenance of the dust collecting electrode to a certain extent, and furthermore, it can prevent the dust from accumulating to some extent by the scraping means, but the dust accumulated on the insulator is removed. It is difficult to completely remove the electrode unit, and eventually the electrode unit must be removed from the housing and cleaned.

  On the other hand, in the high-speed rotating electrostatic precipitator, dust does not easily accumulate on the dust collecting electrode due to the effect of centrifugal force, so the cycle that requires cleaning maintenance can be lengthened. In short, the period of exposure to the dust-containing airflow becomes longer. However, in order to remove the dust from the insulator, there is a difficulty in maintenance, such as cleaning cannot be done without disassembling the device, and the advantage of high-speed rotation has not been fully utilized. .

  Although the high-speed rotary electrostatic precipitator is not easily contaminated with the electrodes, if the dirt gradually accumulates or deteriorates over time such as wear or corrosion, maintenance by the operator is required. In the electric dust collector of Patent Document 2, since the drive unit is fixed to the main body, it is necessary to remove the electrodes one by one at the time of cleaning, and it is necessary to stop the operation for a long time for cleaning. It was a factor that lowered the occupancy rate.

  Therefore, in view of the above circumstances, the present invention has an electrode unit with a high collection efficiency and a simple structure, and dust is easily and reliably deposited without disassembling the device or taking out the electrode unit from the device. It is an object of the present invention to provide an electric dust collector that can clean an insulating member and is easy to maintain for a user.

  In order to solve the above-described problems, in the present invention, a charging axis for applying a voltage to the charged electrode plate holds the charged electrode plate in a suspended state at the top thereof, and is electrically connected to the side plate of the electrode unit by an insulating member. Supported in an insulated state. And the insulating member is provided in the upper part position of the side plate which can be visually observed from the opening of the housing | casing upper part of an electrostatic precipitator, and can be cleaned.

  According to the present invention, the charged electrode plate is held in a suspended state on the charge shaft supported by the side plate of the electrode unit, and the insulating member that supports the charge shaft is provided only on the upper side plate, from the upper opening of the housing, The insulation member located at the top of the side plate can be directly touched with the finger of an operator or cleaned using a cleaning tool. Thus, even if the insulating member is contaminated by dust, the worker can directly clean the insulating member without disassembling the apparatus and without taking out the electrode unit. Furthermore, even if a defect occurs in the electrode part, the electrode can be easily removed as a unit for maintenance and replacement, so that the electric dust collector can be easily maintained.

It is a figure which shows an electrostatic precipitator, FIG. 1A is a perspective view, FIG. 1B is sectional drawing. It is sectional drawing which looked at the electric dust collector from the side, FIG. 2A is sectional drawing including an electrode unit, FIG. 2B is sectional drawing which removed the electrode unit. FIG. 3A is an exploded view of the electric dust collector, FIG. 3A is a view showing a state where the electrode unit is taken out, and FIG. 3B is a view showing the back side of the side door. It is a figure which shows an electrode unit, FIG. 4A is a perspective view, FIG. 4B is an insulator periphery sectional drawing. It is a figure which shows the state which opened the ceiling door of the electric dust collector, FIG. 5A is the perspective view seen from the front side, and FIG. 5B is the perspective view seen from the back side. It is a figure which shows the other Example of an electric dust collector. It is a figure which shows a discharge line.

  In the present invention, in the electrostatic precipitator that separates the dust collected on the dust collecting electrode plate by centrifugal force caused by the rotation of the dust collecting electrode plate, unitization of the electrode unit in which the dust collecting electrode plates and the charged electrode plates are alternately arranged. A study was added. The electrode unit is configured as an electrode unit in which a dust collecting electrode plate and a charging electrode plate are integrated between a pair of opposing side plates, and the electrode unit can be taken out from the casing of the electric dust collector. In addition, by positioning the insulating member that supports the charging shaft that holds the charged electrode plate on the upper side plate of the electrode unit, dirt on the insulating member can be checked directly from the opening at the top of the housing, and the dirt can be wiped off with a cleaning tool. It was to so.

  In a preferred embodiment of the present invention, a loop-shaped sealing material is provided between at least one of the pair of side plates and the housing. By providing this sealing material so as to surround the power receiving unit that receives the voltage applied to the charged electrode plate and the connecting body that transmits the rotational force of the drive motor to the rotating shaft, Thus, the power receiving unit and the coupling body can be sealed. You may provide a sealing material so that it may make one round along the periphery of a side plate. The power receiving unit can be configured by, for example, the end portion of the charging shaft exposed outside the side plate, and the coupling body can be configured by, for example, a magnetic coupling.

  The housing of the electric dust collector may have an openable / closable door that covers an opening provided in the upper part. Moreover, the housing of the electrostatic precipitator may have a nozzle that blows cleaning liquid or air against the insulating member of the electrode unit. By this nozzle, the dirt of the insulating member can be quickly removed, and the insulating member to which the cleaning liquid is adhered can be quickly dried.

  In a typical embodiment of the present invention, the housing of the electrostatic precipitator has a side door for taking in and out the electrode unit, and a side wall facing the side door. The electrode unit is disposed in the flow path so that one of the pair of side plates faces the side door and the other of the pair of side plates faces the side wall. The space surrounded by the pair of side plates, the ceiling of the housing, and the floor of the housing forms a dust collection chamber. In this dust collection chamber, the dust collection electrode plate and the charged electrode plate A dusty airflow flows between them.

  Hereinafter, an embodiment of the electrostatic precipitator 1 according to the present invention will be described with reference to FIG. The electrostatic precipitator 1 according to the present embodiment includes a box-shaped housing 4, a suction port 20 for sucking dust-containing airflow P containing dust from a machining center (not shown) or the like via an exhaust duct (not shown), And an exhaust port 21 for discharging purified air F purified by removing dust. The dust-containing airflow P introduced into the housing 4 from the intake port 20 flows in the direction of the arrow through the flow path D (FIG. 1B) formed between the intake port 20 and the exhaust port 21. The ceiling 22 of the housing 4 includes two openable / closable ceiling doors 31 and a central top plate 23. An electrode unit 10 is installed in the flow path D in the housing 4. The electrode unit 10 includes a plurality of dust collecting electrode plates 2 that collect dust, and a plurality of charged electrode plates 9 that face each of the dust collecting electrode plates 2. They are arranged in parallel and alternately at equal intervals. The housing 4 has a side door 6 for taking in and out the electrode unit 10. A fan 8 is disposed on the downstream side of the electrode unit 10, and an airflow is generated in the housing 4 by the fan 8 to forcibly exhaust.

  FIG. 2A is a side sectional view of the electrostatic precipitator 1. FIG. 2A shows a state in which the dust collecting electrode plate 2 and the charged electrode plate 9 overlap each other when viewed from the front side. The dust collecting electrode plate 2 is a disk-like plate and rotates around the rotation shaft 13. The charged electrode plate 9 is held by the charging shaft 18 and has an arc portion having a radius (centered on the rotation shaft 13) slightly smaller than the radius of the dust collecting electrode plate 2 on the upstream side where the dust-containing airflow P flows. The discharge pins 14 project radially from the outer periphery of the arc portion. The discharge pin 14 constitutes a discharge unit that applies an electric charge to the dust. The tip of the discharge pin 14 is located at the same or slightly inside of the outer peripheral edge of the dust collecting electrode plate 2. The arrangement direction of the discharge pins 14 in the arc portion of the charged electrode plate 9 is along the outer peripheral edge of the dust collecting electrode plate 2. A nozzle 27 is provided directly below the top plate 23. The nozzle 27 is a nozzle that blows cleaning liquid or air against the insulating member 15 that supports the charging shaft 18. The insulating member 15 is formed by applying glaze (superior) to a hard porcelain such as ceramic having excellent insulating properties and high mechanical strength, and is formed in an insulator shape. A commercially available insulator can also be used as the insulating member 15. The insulating member 15 can be cleaned by spraying a cleaning liquid or air on the insulating member 15, and the insulating member 15 to which the cleaning liquid is attached can be quickly dried. The nozzle 27 is not limited to the position directly below the top plate 23, and can be installed at other locations.

  FIG. 2B shows a state where the electrode unit 10 is removed from the housing 4. A contact portion 37 for supplying power to the charged electrode plate 9 is provided on the side wall 5 of the housing 4 facing the side door 6 shown in FIG. 1A. The contact portion 37 includes a contact electrode 37a and an insulating member 37b provided around the contact electrode 37a. The insulating member 37b is the same as the insulating member 15 described above, and supports the contact electrode 37a on the side wall 5 in an electrically insulated state. Reference numeral 24 shown by a broken line is a coupling as a connecting body that transmits the rotational force from the drive motor 35 (FIG. 5B) outside the side wall 5 to the rotating shaft 13 of the dust collecting electrode plate 2. By using a magnetic coupling as the coupling 24, the coupling 24 can transmit power to the rotating shaft 13 without penetrating the side wall 5.

  FIG. 3A shows a state where the side door 6 of the electric dust collector 1 is removed, the opening 25 of the housing 4 is opened, and the electrode unit 10 is taken out. As apparent from FIG. 3A, the electrode unit 10 includes a pair of side plates 11 and 12 (generally made of metal) so that the side plate 11 and the side wall 5 face each other, and the side plate 12 and the side door 6 face each other. In the housing 4. The electrode unit 10 can be taken out from the opening 25 of the housing 4 by removing the side door 6. A pair of legs 17 are provided at the bottom of the electrode unit 10. The leg portions 17 slide on a pair of guide paths 7 provided slightly above the floor surface 3 on the housing 4 side (see FIG. 2) from the near side to the side wall 5 side of the electrostatic precipitator 1 in FIG. As a result, the electrode unit 10 is inserted into the housing 4. As shown in FIG. 3A, a loop-shaped sealing material 16 is provided around the side plate 12 of the electrode unit 10 so as to make a round along the periphery of the side plate 12. A loop-shaped sealing material 26 is also provided around the opening 25 so as to make a round along the periphery of the opening 25. The screw 6 a is a screw that presses and fixes the side door 6 to the housing 4. FIG. 3B shows the back side of the side door 6. When the electrode unit 10 is inserted into the electric dust collector 1 and the side door 6 is tightened with the screw 6a, the sealing material 16 of the side plate 12 is pressed to the position indicated by the two-dot chain line d2 of the side door 6. Further, the sealing member 26 on the housing 4 side is pressed to the position indicated by the two-dot chain line d3 on the back side of the side door 6 by the screw 6a.

  As shown in FIG. 1B and FIG. 2A, in the electrode unit 10, the charged electrode plate 9 is held on the charge shaft 18 in a suspended state on the upper portion thereof. Specifically, as shown in FIG. 4A, an insulating member 15 is fixed to the upper portions of the side plates 11 and 12, and each charging shaft 18 (see FIG. 4B) is supported by the insulating member 15, and each charging shaft is supported. Electrical insulation is made between 18 and the side plates 11, 12. The charging shaft 18 applies a charging potential to the charging electrode plate 9 through a connection hole 9a (see FIG. 1B) provided at an interval above the charging electrode plate 9. A plurality of spacers 29 are inserted in the charging shaft 18 so as to be interposed between adjacent charging electrode plates 9 and between the charging electrode plate 9 and the side plates 11 and 12. The spacer 29 provides a space for accommodating the dust collecting electrode plate 2. The charged electrode plate 9 has a through hole 9b (see FIG. 1B) that allows the rotating shaft 13 to pass through in a non-contact manner. On the other hand, at the lower part of the charged electrode plate 9, the support rod 30 fixes the charged electrode plates 9 to each other via a spacer 29. The spacing between the adjacent charged electrode plates 9 is maintained by the support rod 30 and the spacer 29. The support rod 30 has a role of stably holding the charged electrode plate 9 and is not in contact with the side plates 11 and 12. The insulating member 15 that touches the dust-containing airflow P is provided only on the upper part of the electrode unit 10.

  Bearings 19 are provided on the side plates 11 and 12. This bearing 19 receives the rotating shaft 13 rotatably. The rotating shaft 13 passes through a connection hole (not shown) provided in the center of the disc-shaped dust collecting electrode plate 2. A spacer (not shown) interposed between the dust collecting electrode plates 2 is inserted into the rotary shaft 13 so that the dust collecting electrode plate 2 does not come into contact with the charged electrode plate 9 by this spacer. Space is secured. The dust-containing airflow P flows between the side plates 11 and 12, and dust is collected by the dust collecting electrode plate 2.

  The peripheral structure of the charging shaft 18, the rotating shaft 13, and the support rod 30 of the electrode unit 10 will be described. In FIG. 4B, the insulating member 15 penetrates the side plates 11 and 12 and is fixed in an embedded state in the through holes 11 a and 12 a provided in the side plates 11 and 12. Since the insulating member 15 is fixed in the embedded state, air is prevented from going back and forth through the through holes 11a and 12a on the front and back sides of the side plates 11 and 12. Only one location may be used to supply the charged potential to the charging shaft 18 from a high-voltage power source described later. In this example, power is supplied at the location of the insulating member 15 indicated by S in FIG. 4A. For this reason, it is indispensable that the charging shaft 18 penetrates the side plate 11 in the portion S, but in other places, it is not essential that the charging shaft 18 penetrates the side plates 11 and 12. The charging shaft 18 may be fixed to the side plates 11 and 12.

  The rotary shaft 13 is rotatably supported by a bearing 19 provided in a hole (not shown) that penetrates the side plates 11 and 12. One end of the rotating shaft 13 passes through the side plate 11, and the coupling 13 a is fixed to the rotating shaft 13 in order to receive power from the drive motor 35 outside the side plate 11. In the present embodiment, the magnet type coupling 13a is used as the coupling body for transmitting the power of the drive motor 35 to the dust collecting electrode plate 2. However, the present invention is not limited to this, and a spline shaft, a flexible coupling, etc. May be used. The dust collecting electrode plate 2 rotates at a rotation speed of about 200 times per minute in conjunction with the drive motor 35.

  As shown in FIG. 4A, the side plate 11 has a loop-shaped sealing material 16 that makes a round along its periphery, like the side plate 12 shown in FIG. 3A. In order to receive the charged potential from the contact electrode 37a (FIG. 2B) on the side wall 5, as shown in FIG. 4B, the end of the charge shaft 18 insulated by the insulating member 15 at the position S is used as a power receiving portion 18a. 11 must be exposed outside. Furthermore, in order to receive the rotational force of the dust collecting electrode plate 2 from the drive motor 35, it is necessary to expose the coupling body 13a to the outside of the side plate 11 as shown in FIG. 4A. When the electrode unit 10 is housed in the housing 4 of the electrostatic precipitator 1 and the side door 6 is tightened with the screw 6 a, the side plate 11 of the electrode unit 10 and the side wall 5 of the housing 4 face each other, and the side plate 11 has a peripheral edge. The sealing material 16 that goes around along the side is pressed against the side wall 5 of the housing 4. In FIG. 2B, the location of the side wall 5 against which the sealing material 16 is pressed is indicated by a two-dot chain line d1. Thereby, a seal space surrounded by the side wall 5, the side plate 11, and the sealing material 16 is formed. This sealing space surrounded by the sealing material 16 makes it possible to prevent the place where power reception and power transmission is performed from being sealed from the space where the dust-containing air flow P flows and being contaminated by the contaminated air P. Further, the space surrounded by the side door 6, the side plate 12, and the sealing material 16 is also a sealing space sealed from the space in which the dust-containing airflow P flows.

  Thus, the outside of the side plates 11 and 12 of the electrode unit 10 installed in the flow path D of the dust-containing airflow P is not exposed to the dust-containing airflow P by the sealing material 16, and the inside of the side plates 11 and 12 is The dust collection chamber 42 is exposed to the dust-containing airflow P (see FIG. 5). The dust collection chamber 42 is a space surrounded by the side plates 11 and 12, the ceiling 22 (see FIG. 1) of the housing 4, and the floor surface 3 (see FIG. 1) of the housing 4. At 42, a dust-containing airflow P flows between the dust collecting electrode plate 2 and the charged electrode plate 9.

  FIG. 5 is a diagram illustrating a state in which the ceiling door 31 is opened. Two ceiling doors 31 are provided on the intake port 20 side and the exhaust port 21 side. Any of the ceiling doors 31 is slidable along a pair of rails 32 and 32 and is fixed to the housing 4 by a fixture 33. When the ceiling door 31 is slid, the opening 36 provided in the housing 4 is opened. The opening 36 has a sufficient width to allow contact with the insulating member 15 in the dust collection chamber 42 of the electrode unit 10 accommodated in the housing 4. When the opening 36 is opened, the dust collecting electrode plate 2 and the charged electrode plate 9 sandwiched between the side plates 11 and 12 of the electrode unit 10 accommodated in the electric dust collector 1 can be desired from the outside. Since there is no structure that covers the insulating member 15 exposed inside the side plates 11 and 12 exposed to the dust-containing airflow P on either the electrostatic precipitator 1 side or the electrode unit 10 side, An operator can directly wipe the surface of the insulating member 15 by inserting a cleaning tool such as a waste cloth or a brush. As for the shape of the insulating member 15 on the side exposed to the dust-containing airflow P, a monotonous shape such as a disk shape is preferable because cleaning is easier.

  By sliding the two ceiling doors 31 and opening the openings 36, all of the four insulating members 15 of the electrode unit 10 can be cleaned. In FIG. 5B, reference numeral 35 denotes a drive motor that applies a rotational force to the dust collecting electrode plate 2. Reference numeral 34 denotes a lead wire for applying a charging potential to the charged electrode plate 9, and electrically connects the high voltage power source 40 and the power receiving unit 18a (FIG. 4B). The housing 4 itself is grounded, and the dust collecting electrode plate 2 is also grounded.

Next, operation | movement of the electrostatic precipitator 1 of a present Example is demonstrated.
The dust collecting electrode plate 2 is rotated by driving the drive motor 35. In addition, the dust-containing airflow P flowing into the housing 4 from the air inlet 20 moves between the dust collecting electrode plate 2 and the charged electrode plate 9 by the rotation of the fan 8. The dust contained in the dust-containing airflow P is negatively or positively charged by the corona discharge generated from the tip of the discharge pin 14 of the charging electrode plate 9. The dust collecting electrode plate 2 and the charging electrode plate 9 face each other, so that an electric field is formed between them. The charged dust is attracted to and collected by the dust collecting electrode plate 2 on the ground side.

  Since the dust collecting electrode plate 2 rotates at high speed, the dust adhering to the dust collecting electrode plate 2 is shaken off by centrifugal force. For this reason, it is difficult for dust to accumulate on the dust collecting electrode plate 2, and the maintenance cycle such as cleaning can be lengthened. On the other hand, since the frequency of maintenance of the insulating member 15 in the dust collecting chamber 42 is reduced, the period of exposure to the dust-containing airflow P becomes longer, and therefore the cycle that requires cleaning than the dust collecting electrode plate 2 is shorter. However, due to the structure in which the charged electrode plate 9 is held in a suspended state by the two charge shafts 18 that are passed over the pair of side plates 11 and 12, the insulating member 15 that supports the charge shaft 18 also has Will exist only in Accordingly, since the worker can directly wipe the insulating member 15 exposed to the dust-containing airflow P in the dust collecting chamber 42 from the opening 36 provided in the housing 4 of the electrostatic precipitator 1 with a waste cloth or brush, bother the electrode unit 10. Is not required to be removed from the housing 4 and maintenance can be easily performed. In addition, the maintenance cycle by specialists such as periodic manufacturers can be extended.

  In addition, the dust collecting electrode plate 2 and the charged electrode plate 9 can be easily removed together with the electrode unit 10 simply by removing the side door 6, so that the replacement work is extremely easy. For this reason, for example, in an environment where continuous operation of the electrostatic precipitator 1 is required in a factory or the like, the operation can be started immediately by simply replacing the electrode unit 10 with a new electrode unit 10, and the operation stop time can be reduced. Can be very short.

  Further, unlike the scraping type electrostatic precipitator, there is no notch in the overlapping part of the dust collecting electrode plate 2 and the charged electrode plate 9, so there is no place where the repulsive force between the electrode plates is interrupted, and the collection efficiency is further improved. Get higher.

  Further, since the opening 36 is sufficiently wide, the insulating member 15 and the dust collecting electrode plate 2 can be cleaned using a high pressure washer. By rotating the dust collecting electrode plate 2 at a high speed after cleaning, drying can be done quickly and the operation stop time can be shortened.

  FIG. 6 shows an electrostatic precipitator 100 that accommodates two electrode units 10A. Each electrode unit 10 </ b> A is accommodated in the housing 4 side by side in the stacking direction of the dust collection electrode plate 2 and the charge electrode plate 9. The side plates 11A and 12A of the electrode unit 10A have a rectangular shape, and the outer shape is slightly different from the side plates 11 and 12 of the electrode unit 10 of Example 1, but the charged electrode plate 9, the dust collecting electrode plate 2, and other structures are as follows. This is the same as Example 1. When the side plate 12A of the left electrode unit 10A in the figure and the side plate 11A of the right electrode unit 10A are overlapped, a contactor 41 is provided for electrically connecting the respective charge shafts 18 (see FIG. 4B). ing. Further, a connecting body (not shown) is provided that transmits a rotational force between the respective rotation shafts 13 when the side plate 12A of the left electrode unit 10A and the side plate 11A of the right electrode unit 10A are overlapped. ing.

  When the two electrode units 10A are arranged adjacent to each other and the opposing side plates 11A and 12A are overlapped with each other, the sealing material 16 between the side plates forms a seal space (in FIG. 6, the left electrode Since the sealing material 16 is provided on the side plate 12A of the unit 10A, the sealing material of the side plate 11A of the right electrode unit 10A may not be provided. In this seal space, a contact 41 that electrically connects the charging shaft 18 of each electrode unit 10A and a coupling body (not shown) that transmits rotational force between the rotating shafts 13 of each electrode unit 10A are accommodated. These are sealed from contaminated air. According to the second embodiment, by arranging the two electrode units 10A adjacent to each other, it is possible to meet the demand for an electric dust collector having a large air volume without increasing the size of the electrode unit itself. Further, since the opening 36 (see FIG. 5) has a width comparable to the width of the housing 4, the operator can directly clean all the insulating members 15 in the dust collection chamber of the electrode unit 10A.

  In the present invention, in addition to the above, the following various embodiments can be adopted.

  In FIG. 4, the side plate 11 of the electrode unit 10 is provided with a single sealing material 16 that surrounds the power receiving unit 18 a and the coupling body 13 a, but the two sealing materials 16 that separately surround the power receiving unit 18 a and the coupling body 13 a are provided. It may be provided.

  In the first and second embodiments, ceramic is exemplified as the insulating member 15, but the insulating member 15 may be formed of glass or synthetic resin instead of ceramic. That is, the insulating member 15 may be any material that has excellent insulating properties and high mechanical strength, and may have a shape other than the insulator shape. Further, for example, a cylindrical resin member may be attached to the end of the call shaft 18 or the resin may be integrally formed, and these resin portions may be used as insulating members.

  In the first and second embodiments, the discharge part may be a member having a sharp tip such as a saw blade in addition to the discharge pin 14, or may be a discharge line 14 'as shown in FIG. Further, the charged electrode plate 9 and the discharge part can be separated.

  In the first and second embodiments, the sealing material 16 is provided on the side plates 11 and 12 side. However, the sealing material 16 may be provided inside the side wall 5 or the side door 6.

DESCRIPTION OF SYMBOLS 1 Electric dust collector 2 Dust collector electrode plate 3 Floor surface 4 Housing | casing 5 Side wall 6 Side door 9 Charged electrode plate 10 Electrode unit 11, 12 Side plate 13 Rotating shaft 15 Insulating member 16 Sealing material 18 Charged shaft 18a Power receiving part 20 Inlet 21 Exhaust Mouth 22 Ceiling 13a, 24 Coupling (connector)
26 Seal material 27 Nozzle 31 Ceiling door 35 Drive motor 36 Opening 42 Dust collection chamber D Flow path P Dust-containing airflow

Claims (9)

A housing having an opening at the top;
An intake port for sucking dust-containing airflow containing dust into the housing;
An electrode unit for collecting dust in the dust-containing airflow, provided in a flow path through which the dust-containing airflow sucked from the intake port flows;
An exhaust port for discharging a clean airflow from which dust has been removed,
The electrode unit is detachable from the housing, and includes a pair of opposing side plates, a plurality of dust collecting electrode plates for collecting dust and separating the collected dust by centrifugal force due to rotation, and the collecting unit. A plurality of charged electrode plates facing each of the dust electrode plates, a rotating shaft for rotating the dust collecting electrode plate in response to the rotational force of the drive motor, and a charging shaft for applying a voltage from a power source to the charged electrode plate And having
The dust collecting electrode plate and the charged electrode plate are alternately arranged in a stacked manner with a predetermined interval between the pair of side plates,
The charging shaft holds the charged electrode plate in a suspended state at the upper portion thereof, and is supported in an electrically insulated state on the side plate by an insulating member,
The electric dust collector, wherein the insulating member is provided at an upper position of the side plate that is visible from the opening and can be cleaned.   The electrostatic precipitator according to claim 1, wherein a loop-shaped sealing material is provided between at least one of the pair of side plates and the housing. A power receiving unit that is outside the side plate and receives a voltage applied to the charged electrode plate from the power source;
On the outside of the side plate, comprising a connecting body for transmitting the rotational force of the drive motor to the rotating shaft,
The seal material is provided so as to surround the power receiving unit and the coupling body, and seals the power receiving unit and the coupling body against a dust-containing airflow flowing through the flow path. 2. The electric dust collector according to 2.   The electric dust collector according to claim 2, wherein the sealing material is provided so as to make a round along a peripheral edge of the side plate.   The power reception unit is configured by an end portion of the charging shaft exposed to the outside of the side plate, and the coupling body is configured by a magnetic coupling. Electric dust collector as described.   The electric dust collector according to claim 1, wherein the housing includes a door that can be opened and closed to cover the opening.   The electrostatic precipitator according to claim 1, wherein the casing includes a nozzle that blows cleaning liquid or air against the insulating member of the electrode unit. The housing has a side door for taking in and out the electrode unit, and a side wall facing the side door,
The electrode unit is disposed in the flow path such that one of the pair of side plates faces the side door, and the other of the pair of side plates faces the side wall;
The space surrounded by the pair of side plates, the ceiling of the casing, and the floor of the casing forms a dust collection chamber,
The electric dust collector according to claim 1, wherein the dust-containing airflow flows between the dust collection electrode plate and the charged electrode plate in the dust collection chamber. A plurality of the electrode units are provided,
2. The electric dust collector according to claim 1, wherein each of the electrode units is accommodated in the housing side by side in a stacking direction of the dust collection electrode plate and the charge electrode plate.

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