JP2013215654A - Rotating electrode type electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make maximum use of dust collecting performance and effectively use an installation space by suppressing the height.SOLUTION: A rotating electrode type electric dust collector includes: a plurality of rotating electrode plates 12 rotatable via a central shaft 11; a plurality of fixed electrode plates 13 interposed between the rotating electrode plates 12 while predetermined voltage is applied; a blower making dust-containing air forcedly pass between the rotating electrode plates 12 and the fixed electrode plates 13; an annular band body 16 wound between the central shaft 11 and an outer peripheral shaft 14 disposed outside the rotating electrode plates 13 to correspond to the fixed electrode plates 13 and rotatable along with rotation of the rotating electrode plates 13; a suction dust removing body 15 installed between the central shaft 11 and the outer peripheral shaft 14 so as to come into contact with or closer to the rotating electrode plates 12; and a carrying dust removing body 17 installed near the outer peripheral shaft 11 to come into contact with the annular band body 16.

Description

  The present invention relates to an industrial rotary electrode type electrostatic precipitator that sucks in dust and oil mist (hereinafter collectively referred to as “dust”) generated from a processing machine in a factory and purifies the air in the factory. In particular, the present invention relates to a rotary electrode type electrostatic precipitator that transports and removes dust adsorbed on the rotary electrode plate out of the rotary electrode plate.

  Conventionally, industrial electric dust collectors are used to purify air in factories such as machining centers. This electrostatic precipitator uses a scrubber to remove the dust adsorbed on the rotating electrode plate, so that the performance of the rotating electrode plate can be recovered and regenerated and the life of the rotating electrode plate can be increased. There is an electric dust collector.

  As this type of conventional rotating electrode type electrostatic precipitator, for example, as disclosed in Patent Document 1, a scriber is provided between conductive plates, and the conductive plate is rotated or moved on the conductive plate by rotating or moving the scriber. There is known one provided with a dust collecting portion for scraping off accumulated dust and collecting the dust.

  Further, as disclosed in Patent Document 2, air containing dust (hereinafter referred to as “dusty air”) flows from above, passes through the load electrode, and then makes a U-turn to the dust collecting electrode. An electrostatic precipitator having a U-shaped configuration in which the flow of dust-containing air that flows in and is finally discharged from the exhaust port, scrapes off the dust adsorbed on the rotating electrode plate with an annular belt. It is known that it is transported to the outside of the electric dust collector and dust and oil mist adhering to the return strip are removed by a transport dust removing means.

Japanese Patent Laid-Open No. 8-24710 JP 2009-262007 A

  However, in the electrostatic precipitator described in Patent Document 1 described above, a scriber is provided so as to block a part of the airflow of the dusty air passing between the conductive plates, and the conductive plate on the downstream side of the scriber contains dust. Since air does not contact and dust does not adsorb, there is a problem that the conductive plate cannot be used effectively.

  In general, an electrostatic precipitator is installed in the vicinity of a processing machine that is a dust generation source in a factory, but is often installed above the processing machine because of the space around the processing machine. . However, in the rotating electrode type electrostatic precipitator described in Patent Document 2 described above, the flow of dust-containing air is U-shaped, and an intake duct, an exhaust duct, and a blower are mounted on the top of the electrostatic precipitator. For this reason, the height of the electric dust collector becomes high, and a space for connecting the duct from the processing machine to the intake duct is also required. Therefore, in a factory with a low ceiling, there is a problem that the rotating electrode type electrostatic precipitator described in Patent Document 2 cannot be installed on the processing machine.

  The present invention has been made to solve the above-described problems, and is a rotating electrode capable of making the most of the dust collection performance to the maximum extent and effectively using the installation space while keeping the height low. It aims at providing a type electrostatic precipitator.

  In order to solve the above-mentioned problems, a first rotating electrode type electrostatic precipitator according to the present invention is arranged in parallel in a grounded state, and is applied with a plurality of rotating electrode plates that can rotate via a central axis and a predetermined voltage. Corresponding to a plurality of fixed electrode plates interposed between the rotating electrode plates, a blower for forcibly passing dust-containing air between the rotating electrode plates and the fixed electrode plates, and the fixed electrode plate As described above, the central shaft is wound between the central shaft and an outer peripheral shaft disposed outside the rotary electrode body, and is movable so as to be in contact with or close to the annular belt body and the rotary electrode plate. And an adsorbed dust removing body provided between the outer peripheral shaft and a conveying dust removing body provided in the vicinity of the outer peripheral shaft so as to come into contact with the annular belt, and containing dust charged by charging means After dust in the air is adsorbed on the rotating electrode plate The removed from the rotating electrode plate by suction dust remover is transported attached to the annular band member, characterized in that it is removed from the annular band member by the conveying dust removal means.

  According to the rotating electrode type electrostatic precipitator having this feature, the dust collected by the rotating electrode plate is scraped off by the adsorbed dust removing body and transported by the annular belt, and then the transported dust removing Since the dust is reliably removed by the body, the dust adsorbed on the rotating electrode plate can be reliably conveyed outside the rotating electrode plate without accumulating inside. In addition, stubborn dust that is stuck to the annular belt and does not fall naturally can be reliably removed by the conveying dust removing means, and the performance of the rotating electrode plate can be recovered and regenerated, and the life of the rotating electrode plate can be increased. The risk of fire can be reduced due to the breakdown and the accumulation of dust causing dielectric breakdown.

  The second rotating electrode type electrostatic precipitator according to the present invention is configured such that in the first rotating electrode type electrostatic precipitator, dust-containing air is horizontally passed between the rotating electrode plate and the fixed electrode plate. It is characterized by.

  According to the rotating electrode type electrostatic precipitator provided with this feature, since the dust-containing air passes between the rotating electrode plate and the fixed electrode plate in the horizontal direction, the height of the electric precipitator can be kept low. It becomes easy to mount on the upper part, and effective use of the installation space can be achieved.

  The third rotating electrode type electrostatic precipitator according to the present invention is the first or second rotating electrode type electrostatic precipitator, wherein the adsorbed dust removing body is provided with an opening through which dust-containing air can pass. It is characterized by being.

  According to the rotating electrode type electrostatic precipitator having this feature, the air flow of dust-containing air can be reliably passed through the opening to the rotating electrode plate on the downstream side of the adsorbed dust removing body. The rotating electrode plate can be utilized as effectively as possible. Moreover, generation | occurrence | production of the turbulent flow by contact with dust-containing air and the said adsorbed dust removal body can be suppressed, and generation | occurrence | production of the charging defect in a fixed electrode plate can be prevented.

  Moreover, the 4th rotating electrode type electrostatic precipitator which concerns on this invention is a said 3rd rotating electrode type electrostatic precipitator. WHEREIN: The said cyclic | annular strip | belt body does not superimpose on the said opening part seeing from the passage direction of dust-containing air. It is characterized by being arranged.

  According to the rotating electrode type electrostatic precipitator provided with this feature, the annular belt body does not block the dust-containing airflow that tries to pass through the opening, and therefore the rotating electrode plate can be used to the maximum extent possible. In addition, re-scattering of dust adhering to the annular belt can be prevented. Moreover, generation | occurrence | production of the turbulent flow by contact with dust-containing air and the said adsorbed dust removal body can be suppressed, and generation | occurrence | production of the charging defect in a fixed electrode plate can be prevented.

  The fifth rotary electrode type electrostatic precipitator according to the present invention is the first to fourth rotary electrode type electrostatic precipitators, wherein the annular band is constituted by a chain, and the central axis and the outer peripheral axis include A sprocket is provided.

  According to the rotating electrode type electrostatic precipitator having this feature, power can be reliably transmitted by the chain and the sprocket, and the strength and durability can be improved. In addition, it is possible to prevent the annular belt from slipping (sliding) due to dust, and it is not necessary to install a tension mechanism unlike the belt mechanism, so that the transmission mechanism can be simplified.

  The sixth rotating electrode type electrostatic precipitator according to the present invention is the first to fifth rotating electrode type electrostatic precipitator, wherein the contact portion between the transported dust removing body and the return strip body is an air flow of dust-containing air. It is comprised so that it may be located in the outer side.

  According to the rotary electrode type electrostatic precipitator having this feature, it is possible to prevent the dust removed from the annular belt by the transporting dust remover from being re-scattered by the airflow of the dust-containing air.

  According to the rotating electrode type electrostatic precipitator according to the present invention, it is possible to make the most effective use of the dust collection performance, and it is possible to effectively use the installation space while keeping the height low. An effect can be obtained.

It is a front view which shows the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention. It is a perspective view which shows the 1st dust collection unit of the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention. It is a perspective view which shows the inside of the 1st dust collection unit of the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention. It is a perspective view which shows the adsorption dust removal body of the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention from the lower surface side. It is a front view which shows the effect | action of the 1st dust collection unit of the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention. It is a front view which shows the effect | action of the rotating electrode type electrostatic precipitator which concerns on embodiment of this invention. It is a front view which shows the effect | action of the rotating electrode type electrostatic precipitator which is not provided with the opening part in the adsorption dust removal body.

  Hereinafter, a rotating electrode type electrostatic precipitator according to an embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of the rotating electrode type electrostatic precipitator according to the embodiment of the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is a front view showing a rotating electrode type electrostatic precipitator according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a first dust collecting unit of the rotating electrode type electric precipitator according to the embodiment of the present invention. FIG. 3 is a perspective view showing the inside of the first dust collecting unit of the rotary electrode type electrostatic precipitator according to the embodiment of the present invention, and FIG. 4 is the removal of adsorbed dust of the rotary electrode type electrostatic precipitator according to the embodiment of the present invention. It is a perspective view which shows a body from the lower surface side. In the following description, for the sake of convenience, the front side in the direction perpendicular to the paper surface in FIG. 1 is defined as the front side (front side), and the horizontal and vertical directions are based on FIG.

  As shown in FIG. 1, the rotating electrode type electrostatic precipitator 1 according to the embodiment of the present invention includes a first dust collecting unit 2 and a second dust collecting unit 3 connected to the left and right, and a first dust collecting unit. An intake port 5 connected to the left side of the unit 2 via a wire mesh prefilter 4, an exhaust chamber 6 connected to the right side of the second dust collection unit 3, and an exhaust port 7 provided on the upper surface of the exhaust chamber 6 And a blower 8 provided with a fan (not shown) in an exhaust chamber attached to the right side surface of the exhaust chamber 6, and an oil pan 9 provided below the first dust collection unit 2 and the second dust collection unit 3. Configured.

  As a result, the rotary electrode type electrostatic precipitator 1 is formed in a substantially rectangular parallelepiped shape that is horizontally long and the dust-containing air flowing in from the intake port 5 is the first dust collection as shown by the dashed-dotted arrow in FIG. The inside of the unit 2 and the second dust collecting unit 3 passes in the horizontal direction, passes through the exhaust chamber 6 and is discharged to the outside from the exhaust port 7.

  As shown well in FIGS. 2 and 3, the first dust collecting unit 2 is arranged in parallel at equal intervals in the front-rear direction in the outer frame 10 and is rotatable through the central shaft 11. A plurality of (eight in the present embodiment) rotating electrode plates 12, a plurality (seven in the present embodiment) fixed electrode plates 13 respectively interposed between the rotating electrode plates 12, An adsorbed dust removing body 15 disposed in the lower right portion outside the rotating electrode plate 12 and installed in the same number as the fixed electrode plate 13 between the outer peripheral shaft 14 parallel to the central axis 11 and the central axis 11, and adsorbed dust Two annular bands 16 wound between the central shaft 11 and the outer peripheral shaft 14 in correspondence with the removed body 15, and transport dust provided in the vicinity of the outer peripheral shaft 14 so as to contact the annular band 16 The removal body 17 is provided.

  Similarly, the second dust collecting unit 3 is also provided with a rotating electrode plate 12, a fixed electrode plate 13, an adsorbed dust removing body 15, an annular belt 16, a transporting dust removing body 17, and the like. Is the same as that of the first dust collecting unit 2, and detailed description thereof is omitted here.

  The rotating electrode plate 12 has a disk shape and is grounded, and its center is fixed to the central shaft 11. The central shaft 11 is horizontally supported between the central portion of the front plate 18 and the central portion of the rear plate 19, and the rear end portion of the central shaft 11 is provided on the same axis as the central shaft 11. It is connected to a motor (not shown).

  A reduction mechanism (not shown) is provided inside the geared motor, and the rotational driving force from the geared motor is decelerated by the reduction mechanism and transmitted to the central shaft 11. The central shaft 11 and the rotating electrode plate 12 is configured to rotate integrally. The rotational speeds of the central shaft 11 and the rotating electrode plate 12 are set to be extremely slow, for example, once per minute.

  The fixed electrode plate 13 has a flat plate shape and is supported by a plurality of support rods 20 whose both ends are fixed to the front plate 18 and the rear plate 19 with bolts. A plurality of (seven in this embodiment) guide grooves 21 are formed at equal intervals on the peripheral surface of the support rod 20, and the outer edge 22 of the fixed electrode plate 13 enters the guide grooves 21. The fixed electrode plate 13 is attached to the center position of the installation interval of each rotary electrode plate 12.

  The fixed electrode plate 13 is connected to voltage supply means (not shown), and is configured such that a positive high voltage is applied to the fixed electrode plate 13 by operating the voltage supply means.

  The fixed electrode plate 13 is formed with a substantially rectangular opening 23 that is long in the vertical direction on the left side of the central axis 11 when viewed from the front. As a result, the left edge 24 of the fixed electrode plate 13 is formed in a vertically long strip shape, and the left and right sides of the left edge 24 are provided with a large number of needle-like charges by means such as welding or caulking. The electrodes 25 are supported in a cantilever shape at equal intervals in the vertical direction, and the left and right charging electrodes 25 are inclined slightly to the upper left or lower right. Similarly, on the right side of the opening 23 of the fixed electrode plate 13, a number of needle-shaped charging charges are placed in a posture slightly inclined upward toward the opening 23 by means of welding or caulking. Electrodes 25 are attached at equal intervals in the vertical direction.

  As a result, when a positive high voltage is applied from the voltage supply means to the fixed electrode plate 13, particularly the tip portion of the charging electrode 25 acts as a charging means so that discharge can be performed efficiently.

  In the fixed electrode plate 13, a notch 26 is formed in the radial direction from the lower right outer peripheral portion toward the central axis 11. The cutout portion 26 is formed in an inverted U shape so as not to interfere with the central shaft 11, the adsorbed dust removing body 15, and the annular belt body 16.

  The adsorbed dust removing body 15 is formed of a thin metal thin plate, and is disposed in the notch 26 so that the downward angle α (see FIG. 5) with respect to the horizontal line passing through the central axis 11 is 32.5 degrees. . Further, like the fixed electrode plate 13, the adsorbed dust removing body 15 is interposed between the rotary electrode plates 12, and is formed with a width that maintains an appropriate clearance with respect to the installation interval of the rotary electrode plates 12. And a predetermined clearance from the fixed electrode plate 13.

  FIG. 4 is a perspective view as seen from the lower surface side in an upside down manner from the actual mounting posture so that the configuration of the adsorbed dust removing body 15 can be easily understood. As shown well in FIG. 4, the upper end portion of each adsorbed dust removing body 15 is formed with a hook portion 27 that is curved upward in an inverted U shape. It can be hooked on the shaft 11. Further, a pair of front and rear bent raised portions 28 are formed at the lower end portion of the adsorbed dust removing body 15 at right angles, and each bent raised portion 28 has a round hole into which the outer peripheral shaft 14 can be inserted. 29 are formed. In this way, by inserting the outer peripheral shaft 14 into the round hole 29 and engaging the retaining portion 27 with the central shaft 11, the adsorbed dust removing body 15 is inclined downward between the central shaft 11 and the outer peripheral shaft 14. It can be easily attached to a posture of 32.5 degrees, and the assembling property of the adsorbed dust removing body 15 can be improved.

  An elongated opening 31 is formed at the center of the adsorbed dust removing body 15 in three portions along the longitudinal direction of the adsorbed dust removing body 15, and the opening area of the opening 31 is the adsorbed dust removing body. It is desirable that it be as large as possible while maintaining a predetermined strength of 15. By forming the opening 31, elongated frame pieces 32 a and 32 b are formed along the longitudinal direction on the front and rear sides of the adsorbed dust removing body 15, respectively, and at two positions between the openings 31. The connecting pieces 33 for connecting the front and rear frame pieces 32a and 32b are respectively formed.

  A guide portion 35 is attached to the lower surface side of each connecting piece 33 of the adsorbed dust removing body 15. The guide portion 35 is formed with restriction pieces 35a and 35b extending in a cantilever shape in the front-rear direction, and an annular band is provided between the restriction pieces 35a and 35b and the lower surfaces of the frame pieces 32a and 32b. A space through which the body 16 can pass is formed.

  Referring again to FIG. 3, the annular band 16 is made of a metal and endlessly wound between a drive sprocket 36 inserted into the central shaft 11 and a driven sprocket 37 inserted into the outer peripheral shaft 14. It is comprised by the chain 38 of this. A total of 14 chains 38 are installed in two front and rear rows at positions corresponding to the front and rear frame pieces 32a and 32b of the adsorbed dust removing body 15, and the central axis is maintained so as to maintain an appropriate clearance from the frame pieces 32a and 32b. 11 is arranged in the direction of 32.5 degrees diagonally downward.

  The lower portion 39 of the chain 38 passes through the space between the restricting pieces 35a and 35b and the lower surfaces of the frame pieces 32a and 32b, whereby the passage position of the chain 38 is viewed from the direction in which the dust-containing air passes. The opening 31 is regulated so as not to overlap, and the lower portion 39 (see FIG. 5) of the chain 38 is prevented from loosening.

  The transported dust removing body 17 is constituted by a flat scraper 40 whose both ends are supported by the front plate 18 and the rear plate 19 so as to be parallel to the outer peripheral shaft 14. The scraper 40 is adjusted and installed so that the tip of the scraper 40 comes into contact with the meshing portion 41 of the chain 38 with the driven sprocket 36, and the dirt of the 14 chains 38 can be removed by one scraper 40. Yes.

  As described above, the reason why the arrangement angle α of the adsorbed dust removing body 15 and the chain 38 with respect to the horizontal line passing through the central axis 11 is set to 32.5 degrees obliquely from the central axis 11 is as follows.

  In order not to obstruct the air flow of the dust-containing air, it is desirable to arrange the adsorbed dust removing body 15 and the chain 38 in the horizontal direction along the direction of the air flow of the dust-containing air. Since it is difficult to dispose the transported dust remover 17 outside the airflow of dust air, there is a possibility that the dust collected at the corner may be re-scattered by the airflow of the dust-containing air.

  On the other hand, when the adsorbed dust removing body 15 and the chain 38 are arranged close to the vertical direction of the rotary electrode plate 12 (for example, when the angle α is set to 60 degrees), the formation of the notch 26 and the notch 26 Since the area of the fixed electrode plate 13 with respect to the opening 23 and the number of charging electrodes 25 are reduced, the upper and lower balance of the fixed electrode plate 13 is deteriorated, which adversely affects the dust collection performance, and the collection efficiency. As a result. Further, since the adsorbed dust removing body 15 approaches the direction in which the adsorbed dust removing body 15 faces directly in the direction of the air flow of the dust-containing air, the collected dust falls on the oil pan 9 even if the opening 31 is provided in the adsorbed dust removing body 15. In the meantime, it is easily affected by the airflow of the dust-containing air and easily re-scatters. Further, since the dust-containing air collides with the adsorbed dust removing body 15, vortex or turbulence of the air flow is likely to occur, so that there is a high possibility that charging failure occurs in the charging electrode 25. Furthermore, since the transported dust removing body 17 is disposed below the fixed electrode plate 13, it is difficult to reduce the height of the electric dust collector.

  Therefore, the fixed electrode plate 13 has a good balance between the upper and lower sides, has little resistance to the air flow of the dust-containing air, and the contact location between the transported dust removing body 17 and the return strip 16 is made of dust-containing air. As the optimum direction that can be arranged outside the airflow range h (see FIG. 5), the lower right diagonal 32.5 degrees is selected from the central axis 11.

  Next, the operation of the rotary electrode type electrostatic precipitator 1 having the above-described configuration will be described in detail. Here, FIG. 5 is a front view showing the operation of the first dust collecting unit 2 of the rotating electrode type electrostatic precipitator 1 according to the embodiment of the present invention, FIG. 6 is a front view showing the operation of the rotating electrode type electrostatic precipitator 1, FIG. 7 is a front view showing the operation of the rotary electrode type electrostatic precipitator 1 ′ in which the adsorbed dust removing body 15 is not provided with the opening 31 for comparison with the rotary electrode type electrostatic precipitator 1 according to the embodiment of the present invention. .

  When the rotational driving force from the geared motor is decelerated by the speed reduction mechanism and transmitted to the central shaft 11, the rotating electrode plate 12 and the chain 38 are rotated counterclockwise at a low speed (about 1 rpm in the present embodiment). Rotate. Further, when electric power is supplied to the charging electrode 25 from a high voltage power supply circuit (not shown), corona discharge is generated in the charging electrode 25 and each rotating electrode plate 12 is installed at the ground.

  When the blower 8 is operated in this state, as shown in FIGS. 1 and 5, external dust-containing air passes through the prefilter 4 through the pre-filter 4 due to the suction action of the blower 8. The dust flows into the dust unit 2 in the horizontal direction and passes between the rotating electrode plate 12 and the fixed electrode plate 13. The dust in the dust-containing air that has flowed into the first dust collecting unit 2 in this way is charged by corona discharge from the charging electrode 25 while passing between the rotating electrode plate 12 and the fixed electrode plate 13. The charged dust is adsorbed and collected by the plurality of rotating electrode plates 12 located on the downstream side of the charging electrode 25.

  The dust collected and accumulated on each rotating electrode plate 12 is scraped off by contacting the adsorbed dust removing body 15 and falls to the oil pan 9 by its own weight, or the rotating chain 38 and the chain 38 It adheres to the gap and is conveyed to the outer shaft 14 side on the lower right outside of the rotating electrode plate 12.

  On the outer peripheral shaft 14 side, dust adhering to the chain 38 is scraped off by the scraper 40, and after the dust accumulated in the chain 38 is pushed out by the chain 38 meshing with the driven sprocket 37, the dust is It falls into the oil pan 9 by its own weight and is discharged to the outside. At this time, since the chain 38 conveys dust while rotating counterclockwise, even if dust attached to the chain 38 is detached from the chain 38 during conveyance, it falls to the oil pan 9 below, There is little risk of re-entrainment.

  In the second dust collecting unit 3, the same action as in the case of the first dust collecting unit 2 described above is performed, and the dust adsorbed on each rotating electrode plate 12 falls on the oil pan 9 and is discharged to the outside. Is done.

  On the other hand, as described above, the air that has been cleaned by removing dust while passing through the inside of the first dust collection unit 2 and the second dust collection unit 3 in the horizontal direction passes through the exhaust chamber 6, The direction is changed upward, and the air is discharged to the outside through the exhaust port 7.

  Here, the rotating electrode type electrostatic precipitator 1 ′ in which the opening 31 is not provided in the adsorbed dust removing body 15 as shown in FIG. 7 and the opening 31 in the adsorbing dust removing body 15 as in the above-described embodiment. The rotating electrode type electrostatic precipitator 1 provided will be compared.

  First, in the case of the rotating electrode type electrostatic precipitator 1 ′ in which the opening 31 is not provided in the adsorbed dust removing body 15, the flow of the dust-containing air is blocked by the adsorbed dust removing body 15, and the first dust collecting unit 2. Since the dust-containing air does not come into contact with the rotating electrode plate 12 on the downstream side of the adsorbed dust removing body 15 (the hatched portion in FIG. 7), the dust contained in the dust-containing air cannot be collected. Therefore, the entire surface of the rotating electrode plate 12 cannot be effectively used, and the collection performance of the rotating electrode plate 12 is reduced. Further, in the case of a two-stage type electric dust collector provided with the first dust collection unit 2 and the second dust collection unit 3, the collection performance of the second dust collection unit 3 on the downstream side of the first dust collection unit 2 is improved. It will cause further decline. Further, since the flow of dust-containing air flow is blocked by the adsorbed dust removing body 15, vortices are likely to occur on the upstream side of the adsorbed dust removing body 15, and turbulent flow is generated. .

  On the other hand, in the case of the rotary electrode type electrostatic precipitator 1 in which the opening 31 is provided in the adsorbed dust removing body 15 as in the above-described embodiment, the adsorbed dust removing is performed as shown by the solid line arrow in FIG. The air flow of the dust-containing air can be surely passed through the rotary electrode plate 12 on the downstream side of the body 15, and the rotary electrode plate 12 can be utilized to the maximum extent possible. Further, the dust accumulated on the adsorbed dust removing body 15 is reliably transported out of the air flow by the chain 38 before being re-scattered by the air flow of the dust-containing air, so that it is possible to reliably prevent the dust from re-scattering. it can. Furthermore, even in the case of a two-stage electric dust collector provided with the first dust collection unit 2 and the second dust collection unit 3, the collection performance is reduced in the second dust collection unit 3 on the downstream side of the first dust collection unit 2. Will not cause. Further, since the air flow of the dust-containing air is not blocked by the adsorbed dust removing body 15, there is no vortex or turbulent flow upstream of the adsorbed dust removing body 15, and the charging electrode It is possible to prevent a charging failure from occurring at 25.

  As described above, according to the rotary electrode type electrostatic precipitator 1 according to the embodiment of the present invention, the dust collected by the rotary electrode plate 12 is scraped off by the adsorbed dust removing body 15 and is collected by the annular band 16. After being transported, it is reliably removed by the transported dust removing body 17, so that the dust adsorbed on the rotating electrode plate 12 is reliably transported out of the rotating electrode plate 12 without accumulating inside the dust collecting units 2 and 3. It becomes possible. Further, even if stubborn dust that sticks to the annular band 16 and does not fall naturally can be reliably removed by providing the transported dust removing body 17, the performance of the rotating electrode plate 12 can be recovered and reproduced. The life of the rotating electrode plate 12 can be extended and the risk of fire can be reduced.

  Further, since the dust-containing air passes through the first dust collection unit 2 and the second dust collection unit 3 in the horizontal direction, the height of the electric dust collector can be kept low, which is a source of dust in the factory. It can also be mounted on the upper part of the processing machine.

  Furthermore, an opening 31 is provided in the adsorbed dust removing body 15, and dust-containing air can be passed between the rotating electrode plate 12 and the fixed electrode plate 13 on the downstream side of the adsorbed dust removing body 15. Therefore, the rotating electrode plate 12 can be utilized as effectively as possible.

  Furthermore, since the dust accumulated on the adsorbed dust removing body 15 is transported out of the airflow by the annular band 16 before being rescattered by the airflow of the dust-containing air, rescattering can be prevented. In addition, the generation of turbulent flow due to the contact between the dust-containing air and the adsorbed dust removing body 15 can be suppressed, and the occurrence of charging failure in the charging electrode 25 can be prevented.

  Further, since the annular band 16 is constituted by the chain 38, power can be reliably transmitted through the sprockets 36 and 37, the strength can be increased, and durability can be improved. Furthermore, it is possible to suppress the annular belt body 16 from slipping due to dust, and it is not necessary to install a tension mechanism unlike the belt mechanism, so that the transmission mechanism can be simplified.

  Further, the chain 38 and the adsorbed dust removing body 15 are arranged in the direction of 32.5 degrees obliquely downward from the central axis 11, so that the contact point between the transport dust removing body 17 and the return strip 16 is made of dust-containing air. Since it is outside the air flow, the dust removed from the annular belt 16 by the transport dust removing body 17 is surely discharged to the oil pan 9 without being affected by the air flow of the dust-containing air, and the dust is re-scattered. Can be prevented.

  Further, by arranging the transported dust removing body 17 at the lower right side away from the air flow of the dust-containing air, the chain 38 and the adsorbed dust removing body 15 can be arranged most efficiently, and the electric dust collector can be made compact. be able to.

  In the above-described embodiment, the case where the scraper 40 is installed so as to come into contact with the meshing portion 41 of the chain 38 with the driven sprocket 36 has been described. For example, the scraper 40 is detached from the meshing location 41 with the driven sprocket 36. The scraper 40 may be attached to other places, such as being installed so as to touch the bent portion of the lower portion 39 of the chain 38.

  Moreover, since the above description of the embodiment of the present invention describes a preferred embodiment of the rotating electrode type electrostatic precipitator according to the present invention, various technically preferable limitations may be applied. However, the technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention. That is, the above-described components in the embodiment of the present invention can be appropriately replaced with existing components and the like, and various variations including combinations with other existing components are possible. The description of the embodiment of the present invention described above does not limit the contents of the invention described in the claims.

  The technology of the present invention is expected to be used in a rotary electrode type electric dust collector that sucks and collects dust and oil mist generated in a processing factory.

DESCRIPTION OF SYMBOLS 1 Rotating electrode type electrostatic precipitator 8 Blower 11 Central axis 12 Rotating electrode plate 13 Fixed electrode plate 14 Outer shaft 15 Adsorbed dust removal body 16 Annular belt body 17 Conveyance dust removal body 25 Electrode for charging (charging means)
31 Opening 36 Drive sprocket 37 Driven sprocket 38 Chain

Claims (6)

A plurality of rotating electrode plates arranged in parallel in a grounded state and rotatable via a central axis;
A plurality of fixed electrode plates interposed between the rotating electrode plates in a state where a predetermined voltage is applied;
A blower for forcibly passing dust-containing air between the rotating electrode plate and the fixed electrode plate;
An annular band body that is wound and movable between the central axis and an outer peripheral axis disposed outside the rotating electrode body so as to correspond to the fixed electrode plate,
An adsorbed dust removing body provided between the central shaft and the outer peripheral shaft so as to be in contact with or close to the rotating electrode plate;
A conveying dust removing body provided in the vicinity of the outer peripheral shaft so as to come into contact with the annular belt;
After the dust in the dust-containing air charged by the charging means is adsorbed to the rotating electrode plate, the dust is removed from the rotating electrode plate by the adsorbing dust removing body, and adheres to the annular belt and is conveyed. The rotary electrode type electrostatic precipitator is removed from the annular belt by the conveying dust removing means.   2. The rotating electrode type electrostatic precipitator according to claim 1, wherein dust-containing air is horizontally passed between the rotating electrode plate and the fixed electrode plate.   The rotary electrode type electrostatic precipitator according to claim 1 or 2, wherein the adsorbent dust removing body is provided with an opening for allowing dust-containing air to pass therethrough.   4. The rotating electrode type electrostatic precipitator according to claim 3, wherein the annular belt is disposed so as not to overlap the opening as viewed from the direction in which dust-containing air passes.   The rotary electrode type according to any one of claims 1 to 4, wherein the annular belt is constituted by a chain, and a sprocket is provided on the central shaft and the outer peripheral shaft. Electric dust collector. The structure according to any one of claims 1 to 5, wherein a contact portion between the transported dust removing body and the return strip is located outside the air flow of the dust-containing air. The rotary electrode type electrostatic precipitator as described.