JP5616124B2 - Electric dust collector - Google Patents

Description

  The present invention relates to an electric dust collector for purifying a gas containing dust such as soot and dust discharged from an industrial apparatus such as an incinerator, a melting furnace, a power generation boiler, and a metal melting furnace.

  In industrial equipment such as incinerators, melting furnaces, power generation boilers, metal melting furnaces, etc., high-temperature exhaust gas (hereinafter simply referred to as “gas”) containing dust and other dust accompanying combustion and heating reactions during operation. Occurs). The gas discharged from the industrial apparatus is cooled to a certain temperature, and then sent to a filtration dust collector or an electric dust collector. The dust is collected and removed by these dust collectors.

  Comparing the filtration type dust collector and the electric dust collector, it is said that the filtration type dust collector using the bag filter is generally superior in the dust collection performance with respect to the dust bodies dispersed in the gas. However, when the gas temperature becomes high, the bag filter becomes unusable. Therefore, in such a case, an electric dust collector that collects and removes the dust bodies by an electrostatic force (capturing force) is used.

  For example, the electrostatic precipitator has a hollow casing 100 as shown in the schematic diagram of FIG. A gas inlet 102 and a gas outlet 104 are formed in the casing 100. In the casing 100, the discharge electrode 106 and the dust collection electrode 108 are arranged along the gas G feeding direction. A high voltage power source (not shown) is connected to the discharge electrode 106, and a drive voltage can be applied between the discharge electrode 106 and the dust collection electrode 108.

According to this type of electric dust collector, as shown in an enlarged view of the main part in FIG. 10, the gas G containing the dust bodies P is circulated between the discharge electrode 106 and the dust collection electrode 108. By charging and charging the dust bodies P contained in the gas G by corona discharge from the electrodes 106, the dust bodies P can be attracted and adsorbed to the dust collection electrodes 108 by electrostatic force EF.
Here, as this type of electrostatic precipitator, for example, the one described in Patent Document 1 is known.

  In the electric dust collector described in the same document, the dust collecting electrode is formed in an elongated mesh plate shape along the gas flow direction. The discharge electrode is formed in an elongated rod shape extending in the vertical direction substantially perpendicular to the gas flow direction, and is supported so as to face the front surface portion or the back surface portion of the dust collection electrode. Thereby, the box-shaped mesh filter which the one end opened with the flame | frame and the metal net | network is comprised. According to the electrostatic precipitator described in the same document, by setting the gas flow to pass through the space inside and outside the mesh filter through the opening, the exhaust gas containing soot and dust always passes through the filter surface. Thus, the dust collection efficiency for the dust in the gas can be improved.

JP 2004-160286 A

However, if the exhaust gas containing soot and dust is configured to pass through the filter, if the exhaust gas containing a large amount of water flows due to failure or failure of the equipment of the previous stage, for example, the gas cooling tower, etc. If the inside becomes dew point temperature and condensation occurs and the humidity inside the device becomes high, the filter may be clogged.
Generally, this type of electrostatic precipitator is placed just before the attracting fan for attracting exhaust gas to the chimney. For this reason, when the filter is clogged, the attractive force of gas by the attractive fan is reduced. Therefore, the gas flow deteriorates due to a decrease in the attractive attraction force until the equipment in the previous stage of the electrostatic precipitator, and eventually the incinerator, has an adverse effect on the incineration operation.

  Therefore, the present invention has been made paying attention to such problems, and is used for emergency evacuation when the filter part is clogged due to troubles in the previous stage equipment or moisture inside the dust collector. Even in such a case, the attractive attraction force and the gas flow can be maintained in the same state as the gas flow in a normal electrostatic precipitator, thereby maintaining the electrostatic precipitating effect and maintaining a constant dust collection. An object of the present invention is to provide an electric dust collector capable of ensuring efficiency.

In order to solve the above problems, an electrostatic precipitator according to the present invention is an electric precipitator that collects dust contained in a gas by electrostatic force . A casing, a plurality of discharge electrodes disposed in the casing, and a box portion disposed in the casing and formed in a box shape having an exhaust port opened at one end thereof, and partitioning the inner and outer spaces Comprises a plurality of dust collecting electrodes formed by a mesh filter, and voltage applying means for applying a driving voltage between the plurality of discharge electrodes and the plurality of dust collecting electrodes, each discharge electrode having the box shape the dust collection electrode side are arranged in a plurality of charging passage extending opposite the, during normal operation, the attraction attraction induction fan flow of gas in the casing occurs, the plurality of From the current path after flowing through each mesh filter inside to the plurality of dust collection electrode of the plurality of dust collection electrode, an electric precipitator for exhausting to the outside of the casing through the respective exhaust port, said plurality of a plurality of partition plates provided to be controlling the flow of gas directed from the primary side of the plurality of dust collection electrode to the secondary side is provided to be opened and closed positions of the charging passage respective outlets, said plurality Open / close drive means for simultaneously opening and closing the partition plate from the outside of the casing, and when the plurality of partition plates are closed by the open / close drive means, the gas flow in the casing is transferred from the plurality of charging flow paths. When the plurality of partition plates are opened by the opening / closing drive means after flowing into the plurality of dust collecting electrodes and then evacuating to the outside of the casing, An induction force generated by the induction fan is guided to an open portion of the plate so that the gas flow in the casing does not flow into the inside of the plurality of dust collecting electrodes, and from the plurality of charging flow paths to the casing. It is characterized by exhausting to the outside .

According to the electric precipitator according to the present invention, in one of the casing, and a plurality of discharge electrodes, and a plurality of dust collecting electrodes at least a portion of the partition wall for partitioning the inside and outside space is formed by the mesh filter arrangement In the electrostatic precipitator formed, each discharge electrode is disposed in a plurality of charging flow paths extending opposite to the side surface of the box-shaped dust collection electrode, and from the primary side to the secondary side of the dust collection electrode . a plurality of partition plates that control the flow of gas is openably provided at the position of the exit of each charging channel led, since simultaneously openable configure multiple partition plates by opening and closing drive means from the casing outside, If each partition plate is closed during normal operation , the gas flow in the casing is passed through the space inside and outside the mesh filter of the dust collection electrode, so that the attraction force and the gas flow are the same as those in a normal electric dust collector. Gas flow and Flip can be a state.

Then, if a plurality of states of the partition plate is opened by opening the opening and closing drive means and have guiding attractant attraction open portion of the partition plate, the flow of gas in the casing, flows into the interior of the dust collection electrode Therefore, the gas flow does not pass through the filter surface because it can be exhausted from the respective charging flow paths to the outside of the casing . Thereby, although the filtration effect cannot be expected, the electric dust collection effect is maintained as in the normal operation . Therefore, a certain dust collection efficiency can be ensured. Therefore, even if the filter is clogged due to troubles in the previous equipment or due to moisture inside the dust collector, the attractive force and gas flow can be reduced to normal air without affecting the previous equipment. In this way, it is possible to maintain the same state as the flow of the gas, thereby maintaining the electric dust collection effect and ensuring a certain dust collection efficiency.
The present invention is used as an emergency avoidance device, and does not operate with the partition plate opened for a long period of time.

  As described above, according to the electric dust collector according to the present invention, when the filter part is clogged due to the trouble of the previous equipment or due to moisture inside the dust collector, the attractive attraction force is used for emergency evacuation. In addition, the gas flow can be maintained in the same state as the normal air flow to maintain the electric dust collection effect and to ensure a certain dust collection efficiency.

It is a perspective view which shows the structure of 1st embodiment of the electrical dust collector which concerns on this invention. It is a top view (figure of the state where the partition plate was closed) which shows typically the composition of the electric dust collector shown in Drawing 1 (first embodiment). FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 4 is an enlarged view of a main part showing a relationship between discharge lines and mesh filters of the discharge electrode shown in FIG. 3 and a dust-like body, in which an image of a charging flow path, a dust collecting electrode, and a gas flow is shown. It is a top view (figure of the state where the partition plate was opened) which shows typically the composition of the electric dust collector shown in FIG. It is a perspective view which shows the structure of 2nd embodiment of the electrical dust collector which concerns on this invention. It is a top view (figure of the state where a partition plate was closed) which shows typically composition of an electric dust collector shown in Drawing 6 (second embodiment). It is a top view (figure in the state where the partition plate was opened) which shows typically the composition of the electric dust collector shown in FIG. It is a top view which shows typically an example of a structure of the conventional electrostatic precipitator. It is a principal part enlarged view in the electric dust collector of FIG.

Hereinafter, a first embodiment of an electrostatic precipitator according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the electric dust collector 10 includes a hollow casing 12 formed in a substantially rectangular shape, and a discharge electrode 14 and a dust collection electrode 16 disposed inside the casing 12. Yes. In the top plate portion of the casing 12, a box-shaped storage portion 28 is formed at the center in the longitudinal direction L. In the housing portion 28, a conduction member (not shown) for conducting a drive voltage power supply (not shown) to the discharge electrode 14, an insulator (not shown) for insulating the conduction member and the casing 12, etc. Is stored.

  The casing 12 is provided with a funnel-shaped hopper 18 on the bottom plate portion so as to protrude downward. The hopper 18 has a cross-sectional area that gradually decreases from the upper end side toward the lower end side, and penetrates in the height direction of the device (in the direction of arrow H). A flange member 19 is disposed at the lower end of the hopper 18. A discharge device (for example, a screw conveyor or a rotary valve) for discharging the dust collected in the casing 12 to the outside of the system is attached to the flange member 19.

Further, in the hopper 18, a gas introduction port 20 is opened in a side plate portion on one end side (left side in FIG. 1) along the longitudinal direction (arrow L direction) of the apparatus in the gas supply direction. . The gas inlet 20 is connected to the leading end of an inlet duct 22 that constitutes a gas G flow passage.
The introduction duct 22 has a base end connected to an exhaust gas outlet (not shown) of an industrial apparatus such as an incinerator, a melting furnace, a power generation boiler, or a metal melting furnace. And the gas G discharged | emitted from this waste gas port normally contains the dust-like bodies P (refer FIG. 10 mentioned above), such as a dust and soot and dust, in high concentration, and it introduces into the casing 12 through the introduction duct 22. It is sent. The shape and mounting position of the introduction duct 22 may change depending on the shape and arrangement of the exhaust port of the industrial device. In addition, when the temperature of the gas G discharged from the exhaust port of the industrial apparatus is very high, for example, the gas G is discharged from the electric dust collector 10 by the gas cooling device provided in the middle of the introduction duct 22. After cooling to below the temperature, this gas G is fed into the casing 12.

  Further, as shown in FIG. 1, the casing 12 has a gas discharge port 24 on the rear plate portion 12 </ b> B on the other end side (the back side in the drawing of FIG. 1) along the width direction (arrow W direction) of the apparatus. It is open. The gas discharge port 24 is open near the upper end of the rear plate portion 12B and in the vicinity of the end portion on the opposite side of the gas introduction port 20 along the longitudinal direction L. The gas discharge port 24 is connected to a base end portion of a discharge duct 26 that constitutes a flow path for the gas G.

  An induction fan (not shown) is disposed in the middle of the discharge duct 26. The induction fan sucks the gas G from the internal space of the casing 12 through the discharge duct 26. As a result, a gas flow in which the gas G flows from the gas inlet 20 of the casing 12 toward the gas outlet 24 of the casing 12 as a whole is formed inside the casing 12, and dust collection processing is performed in the casing 12. The broken gas G passes through the discharge duct 26 and is sent to a processing apparatus that performs other processing on the gas G as required, or is discharged into the atmosphere.

The plurality (three in the present embodiment) of dust collecting electrodes 16 arranged in the casing 12 are each formed in a thick plate shape and hollow inside. These dust collecting electrodes 16 are supported by the casing 12 via brackets (not shown) such that the thickness direction thereof coincides with the width direction W.
Further, in the casing 12, between a pair of adjacent dust collecting electrodes 16, between the dust collecting electrode 16 and the front plate portion 12 </ b> F (see FIG. 2), the dust collecting electrode 16 and the rear plate portion 12 </ b> B ( Discharge electrodes 14 are respectively disposed between them (see FIG. 2). As shown in FIG. 1, the discharge electrode 14 has a ladder-like structure (ladder structure) as a whole, and faces the mesh filter 30 (see FIG. 2) of the dust collection electrode 16 described in detail later. Placed in.

  The discharge electrode 14 is divided into a plurality of stages (three stages in the present embodiment) along the height direction H by a steel pipe connection material 52, and a plurality of discharge lines 60 are hung between a pair of upper and lower connection materials. Has been passed. In each stage, the discharge lines 60 are arranged at equal intervals along the longitudinal direction L, and the number of the discharge lines 60 arranged in each stage is gradually reduced from the lower stage toward the upper stage. Here, the height direction (arrow H direction) shown in FIG. 1 substantially coincides with the flow direction of the gas G in the charging channel 58. Further, the three dust collecting electrodes 16 are arranged at substantially the same positions as the three-stage discharge line support portions 50 in the discharge electrode 14 along the height direction H and the longitudinal direction L, respectively. As a result, the lower mesh filter 30 of the dust collection electrode 16 faces the lower discharge line 60, the middle mesh filter 30 faces the middle discharge line 60, and the upper mesh filter 30 faces the upper discharge line 60. Against.

The discharge line 60 is formed in a strip shape from a conductive metal material, and its upper end and lower end are connected to the upper and lower connecting members 52, respectively, and a high-voltage current flows to each discharge line 60 through the connecting member 52. . A large number of discharge protrusions are formed radially on the outer periphery of the discharge wire 60, so that corona discharge is likely to occur from the tip of the discharge protrusion when a voltage is applied.
A suspension tube 54 made of a conductive material is connected to the central portion in the longitudinal direction L of the uppermost connection member 52 in the discharge electrode 14. The suspension tube 54 is connected to a power supply member (not shown) disposed in the storage portion 28 via a power supply cable (not shown), and supplies power to the discharge electrode 14 through the connecting member 52.

Here, as shown in FIG. 1, each dust collecting electrode 16 includes an upper closing plate 38 spanned between the upper end portion of the support frame 34 and the upper end portion of the closing plate 36, and the lower end portion of the support frame 34. And a lower closing plate 40 spanned between the lower end portion of the closing plate 36. Further, the dust collecting electrode 16 is provided with an upper partition wall portion 42 and a lower partition wall portion 43 that divide the internal space into three internal flow paths 44, 46, 48.
Each dust collecting electrode 16 has a support frame 34 disposed at one end on the exhaust ports 45, 47, 49 side along the longitudinal direction L, and a closing plate 36 disposed at the other end. . The support frame 34 is formed in a rectangular frame shape from shape steel. The closing plate 36 is elongated in the height direction H, and closes the other end of the dust collecting electrode 16.

  As shown in FIG. 2, each dust collection electrode 16 is formed by a mesh filter 30 having air permeability between the support frame 34 and the closing plate 36. The mesh filter 30 is configured by knitting a fibrous material, a wire-like material, or the like made of a conductive metal into a net-like body. The mesh filter 30 is composed of a plurality of divided pieces each formed in a planar shape, and these divided pieces are each attached to a frame member (not shown) formed in a frame shape from a shape steel. It is attached to the support frame 34 and the closing plate 36 via a frame member. Note that the top surface portion and the bottom surface portion of the dust collecting electrode 16 are in a closed state in which the gas G is not vented by the upper closing plate 38 and the lower closing plate 40, respectively. Regarding the fineness (number of meshes) of the mesh filter 30, the amount of gas G per unit time, the number per unit volume of the dust bodies P (see FIG. 10) contained in the gas G, the dust bodies P The average particle size and the particle size distribution are appropriately set. Note that the mesh filter 30 usually has a finer mesh size (a larger number of meshes) has a higher dust collection efficiency with respect to the dust bodies P. However, the mesh filter 30 is more likely to be clogged, and the time until the clogging occurs is shorter. Therefore, it is necessary to appropriately set the number of meshes in consideration of these balances.

  As shown in FIG. 2, three internal flow paths 44, 46, and 48 through which the gas G that has passed through the mesh filter 30 circulates are formed inside each dust collection electrode 16. In the dust collecting electrode 16, three exhaust ports 45, 47, and 49 are opened on the side end surface on one end side (right side in the figure) along the longitudinal direction L, as shown in FIG. Further, inside the casing 12 on the discharge side, a gas G collecting chamber 33 is formed facing the exhaust ports 45, 47 and 49. The gas G discharged from the exhaust ports 45, 47, 49 of the dust collection electrode 16 flows into the collecting chamber 33. And the gas G which distribute | circulated the internal flow paths 44, 46, and 48 is discharged | emitted out of the casing 12 from the gas discharge port 24 through the exhaust ports 45, 47, and 49, respectively.

  As shown in FIG. 2, the plurality of (three) dust collecting electrodes 16 described above are arranged along the width direction W at an equal pitch. A space penetrating along the width direction W and the height direction H is formed between a pair of dust collecting electrodes 16 adjacent to each other. This space serves as a charging flow path 58 for applying a charge to the dust body P in the gas G by the discharge electrode 14 described above. Further, a charging flow path 58 is also formed between the dust collection electrode 16 and the front plate portion 12F of the casing 12 and between the dust collection electrode 16 and the rear plate portion 12B of the casing 12.

  Here, the electric dust collector 10 is provided with partition plates 70 that partition the primary side and the secondary side of the dust collection electrode 16 between the support frames 34 of the pair of dust collection electrodes 16 adjacent to each other. Yes. Each partition plate 70 is a long rectangular plate member formed so as to be able to cover the entire portion between the support frames 34 (see FIG. 1). As shown in FIG. 2, one end of the long side is pivotally supported on the support frame 34 by a hinge 72. Thereby, each partition plate 70 can be rotated around the pivotally supported portion. Furthermore, one end of a connection link 74 is connected to each partition plate 70 on the side of the collection chamber 33 on the wall surface, and the other end of each connection link 74 is the direction in which the dust collection electrodes 16 are arranged (width direction W). Is pivotally supported by a rod 76 of a cylinder 78 for opening and closing disposed along the axis. Note that both ends of the connecting link 74 are pivotally supported.

  As shown in the figure, the main body portion of the cylinder 78 is attached to the outside of the casing 12, and only the rod 76 portion is disposed so as to extend into the casing 12. Therefore, each partition plate 70 can be opened and closed from the outside of the casing 12 even when the electric dust collector 10 is in operation. When the rod 76 is extended by the expansion / contraction operation of the rod 76, the partition plates 70 are simultaneously closed (see FIG. 2), and when the rod 76 is shortened, the partition plates 70 are simultaneously opened (see FIG. 2). As shown in FIG. 5, each partition plate 70 can be opened and closed from the outside of the casing 12. The expansion / contraction direction of the rod 76 and the open / closed state of the partition plate 70 may be set in the opposite manner.

Next, a dust collection process for the gas G by the electric dust collector 10 configured as described above will be described.
The electric dust collector 10 operates an induction fan (not shown) disposed in the middle of the discharge duct 26 when operating an industrial apparatus such as an incinerator, a melting furnace, a power generation boiler, or a metal melting furnace. As a result, the upstream side of the introduction duct 22, the casing 12, and the discharge duct 26, which is the space on the industrial device side with respect to the induction fan, is in a negative pressure state, and the gas G including the dust P generated by the industrial device The air is sucked into the casing 12 through the introduction duct 22.

  Of the space in the casing 12, the inner part of the hopper 18 is a distribution chamber 90 for the gas G flowing into the casing 12 from the gas inlet 20 as shown in FIG. As shown in FIG. 2, the gas G thus distributed is distributed and flows into a plurality of (four in the present embodiment) charging flow paths 58. Here, in the normal state, the partition plates 70 are closed (see FIG. 2), and the exhaust ports 45, 47, 49 of the respective dust collecting electrodes 16 are opened. As a result, the gas G flowing into the distribution chamber 90 in the casing 12 is distributed to the plurality of charging flow paths 58, and the internal flow paths 44, 46, 48 from each charging flow path 58 through the mesh filter 30 of the dust collecting electrode 16. And then discharged to the collecting chamber 33 through the exhaust ports 45, 47 and 49.

  Specifically, the gas G flowing into the charging channel 58 flows from the lower end (opening end) to the upper end (closing end) of the charging channel 58 as a whole by the action of the negative pressure generated by the attracting fan. However, the gas G also has a velocity component that moves from the inlet of the charging channel 58 to the back side due to the inertial action. At this time, as shown in FIG. 3, the discharge electrode 14 is disposed in the charging channel 58, and a drive voltage is applied to the discharge line 60 of the discharge electrode 14 by a high-voltage power supply (not shown). .

  As a result, an ion flow IJ (see FIG. 3) that flows from the discharge line 60 to the mesh filter 30 side of the dust collection electrode 16 is formed in the charging channel 58 due to the influence of corona discharge generated by the discharge line 60. At the same time, as shown in FIG. 4, the charge C is applied to the dust bodies P included in the gas G and charged to a predetermined polarity. For this reason, the gas G and the dust bodies P flowing in the charging channel 58 are attracted to the mesh filter 30 by the electrostatic force EF while flowing in the charging channel 58. As a result, the particulate matter P passes through the inside of the mesh filter 30 and flows into the internal flow paths 44, 46 and 48.

  Here, since the mesh filter 30 electrostatically applies an attractive force to the dust body P charged to a predetermined polarity, when the gas G passes through the mesh filter 30, the dust in the gas G The shape P is adsorbed on the outer surface of the mesh filter 30 and is also trapped in a minute gap (inner surface) inside the mesh filter 30 when passing through the mesh filter 30. Therefore, when the gas G passes through the mesh filter 30, the dust P contained in the gas G can be efficiently removed by the mesh filter 30, and the dust P is removed from the mesh filter 30 and cleaned. The gas G is fed into the internal flow paths 44, 46 and 48.

  As shown in FIG. 2, the gas G sent into the internal flow paths 44, 46, 48 flows into the collecting chamber 33 through the exhaust ports 45, 47, 49 of the dust collecting electrode 16. Since the gas discharge port 24 is opened at the upper end portion of the collective chamber 33 (see FIG. 1), the gas G flowing into the collective chamber 33 is discharged to the exhaust duct 26 through the gas exhaust port 24, From the discharge duct 26, the gas G is sent to an apparatus for performing other processing as required, and is released into the atmosphere.

  As a result, according to the electric dust collector 10, the gas G flowing into the casing 12 can be discharged outside the apparatus after passing through the mesh filter 30 having a very large surface area per unit volume. And even if it does not lengthen the dimension of the casing 12 to a specific direction, the contact area of the gas G containing the charged dust-like body P and the dust collection electrode 16 (mesh filter 30) can be increased efficiently. .

  And according to this electric dust collector 10, the dust collection electrode which comprised the box-shaped mesh filter 30 which one end opened by the discharge electrode and the flame | frame, and the metal mesh in the casing 12 is arrange | positioned, and gas flow is In the electric dust collector set so as to pass through the space inside and outside the mesh filter 30 through the opening, a partition plate 70 that partitions the primary side and the secondary side of the dust collection electrode 16 is provided outside the casing 12. The cylinder 78 (opening / closing drive means) can be opened and closed. Therefore, as described above, if the partition plate 70 is closed as shown in FIG. , 49 through the space inside and outside the mesh filter, the attractive force and the gas flow can be made to be the same as the gas flow in an ordinary electric dust collector.

  Then, as shown in FIG. 5, if the partition plate 70 is opened and closed by driving the cylinder 78 from the outside, and each partition plate 70 is opened at the same time, the attractive force is applied to the open portion of the partition plate 70. Therefore, the gas flow does not pass through the filter surface. Thereby, although the filtration effect cannot be expected, the electric dust collection effect is maintained as usual. Therefore, even in such a state, a certain dust collection efficiency can be ensured. Therefore, even if the filter part is clogged due to troubles in the preceding equipment or due to moisture inside the dust collector, the attractive force and gas flow can be reduced to normal levels without affecting the previous equipment. It can be maintained in the same state as the gas flow in the electrostatic precipitator, whereby the electrostatic precipitating effect can be maintained and a certain dust collection efficiency can be ensured. However, the present invention is used as an emergency avoidance device and does not operate by opening the partition plate 70 for a long period of time.

As described above, according to the electric dust collector 10, when the filter portion is clogged due to trouble in the previous stage equipment or due to moisture inside the dust collector, the attractive attraction force and The gas flow is also maintained in the same state as the gas flow in a normal electric dust collector, so that the electric dust collection effect can be maintained and a certain dust collection efficiency can be ensured.
In addition, the electric dust collector which concerns on this invention is not limited to the said embodiment. For example, in the electrostatic precipitator 10 of the above embodiment, the dust collecting electrode 16 has a three-divided structure composed of the electrode units 62, 64, 66, but the dust collecting electrode can be divided into two or more than four. It is also possible to use. Further, depending on the configuration (number and height) of the dust collecting electrodes, the entire partition plate may be divided into a plurality of blocks, and each block may be configured to be opened and closed separately using a plurality of cylinders.

In the above embodiment, the description of the position detection of the opening / closing position of the partition plate 70 is omitted. Of course, the expansion / contraction state of the cylinder rod 76 is detected by a sensor, and the current partition is determined based on this. It is preferable to display on the control panel whether the position of the plate is in the “closed” state or the “open” state.
Furthermore, in the above-described embodiment, an example of a pivoting door method has been described as an opening / closing method of the partition plate 70. However, the opening / closing method of the partition plate 70 may be a sliding door method. These methods can be selected appropriately depending on the internal structure of the electric dust collector 10.

Hereinafter, a second embodiment in which the opening / closing method of the partition plate 70 is a sliding door type will be described with reference to FIGS. 6 to 8 as appropriate. In addition, since this 2nd embodiment is the same as that of the said 1st embodiment except the point from which the opening / closing method of the partition plate 70 differs, a different point is demonstrated here and it abbreviate | omits about other description.
As shown in FIG. 6, the electrostatic precipitator 10 of the second embodiment has a primary side and a secondary side of the dust collecting electrode 16 between the support frames 34 of a pair of dust collecting electrodes 16 adjacent to each other. A partition plate 70 for partitioning is provided. As shown in the figure, each partition plate 70 is a long rectangular plate member formed so as to be able to cover the entire portion between the support frames 34. As shown in FIG. 7, each partition plate 70 is slid along the arrangement direction (width direction W) of the dust collection electrodes 16 by a slide guide (not shown) instead of the hinge 72 as in the first embodiment. Mounted movably. Furthermore, one end of a connection link 74 is connected to each partition plate 70 on the side of the collection chamber 33 on the wall surface, and the other end of each connection link 74 is the direction in which the dust collection electrodes 16 are arranged (width direction W). Is fixed to a rod 76 of a cylinder 78 for opening and closing disposed along the axis. Note that both ends of each connection link 74 have a fixed structure.

As shown in the figure, the main body portion of the cylinder 78 is attached to the outside of the casing 12, and only the rod 76 portion is disposed so as to extend into the casing 12. Therefore, even when the electric dust collector 10 is in operation, it can be opened and closed by sliding the partition plates 70 from the outside of the casing 12. When the rod 76 is extended by the expansion / contraction operation of the rod 76, the partition plates 70 are closed simultaneously (see FIG. 7), and when the rod 76 is shortened, the partition plates 70 are opened simultaneously. The partition plates 70 are configured to be openable and closable from the outside of the casing 12 so as to be located at positions where the exhaust ports 45, 47 and 49 are closed (see FIG. 8). The expansion / contraction direction of the rod 76 and the open / closed state of the partition plate 70 may be set in the opposite manner.
Even if it is such a structure, there can exist an effect similar to the electric dust collector 10 of said 1st embodiment.

  Furthermore, in the case of the revolving door type exemplified in the electric dust collector 10 of the first embodiment, a revolving space necessary for opening the partition plate 70 is necessary, and thus the necessary space is sufficient. It can be applied to the case where the structure can be secured. On the other hand, for example, when a reinforcing brace or the like of the casing structure of the dust collector is in the rotating space, it is difficult to secure a sufficient space, so it is difficult to adopt the rotating door type. Thus, when a space cannot be secured, it is preferable to select the slide type exemplified in the electric dust collector 10 of the second embodiment. Even when each partition plate 70 is a slide type, a cylinder is suitable as an actuator (open / close drive means) for sliding movement. In both types, the cylinder power source can be adopted regardless of pneumatic, hydraulic, or electric.

DESCRIPTION OF SYMBOLS 10 Electric dust collector 12 Casing 14 Discharge electrode 16 Dust collection electrode 18 Hopper 19 Flange member 20 Gas introduction port 22 Introduction duct 24 Gas exhaust port 26 Exhaust duct 28 Storage part 30 Mesh filter 33 Collecting chamber 34 Support frame 36 Closure plate 44, 46, 48 Internal channel 45, 47, 49 Exhaust port 52 Connecting material 54 Suspension tube 55 High voltage cable 58 Charging channel 60 Discharge line 70 Partition plate 72 Hinge 74 Connection link 76 Rod 78 Cylinder (opening / closing drive means)
90 Distribution chamber C Charge G Gas I J Ion flow P Dust

Claims (1)

In an electrostatic precipitator that collects dust contained in gas by electrostatic force,
One casing through which gas flows, a plurality of discharge electrodes disposed in the casing, a box disposed in the casing and having an exhaust opening opened at one end thereof, and an inner and outer space A plurality of dust collecting electrodes in which at least a part of partitioning wall sections are formed by a mesh filter, and a voltage applying means for applying a driving voltage between the plurality of discharge electrodes and the plurality of dust collecting electrodes, Each discharge electrode is disposed in each of a plurality of charging flow paths extending opposite to the side surface of the box-shaped dust collecting electrode, and an induction fan generates a gas flow in the casing during normal operation. the attraction attraction, after said plurality of charging passage is flowed through each mesh filter of the plurality of dust collection electrode to the inside of the plurality of dust collection electrode, said Ke through each outlet A electrostatic precipitator for exhausting the single external,
A plurality of partition plates provided at the outlet positions of the plurality of charging flow paths so as to be openable and closable so as to control the flow of gas guided from the primary side to the secondary side of the plurality of dust collecting electrodes; , and a closing drive means for simultaneously opening and closing the plurality of partition plates from the casing outside,
When the plurality of partition plates are closed by the opening / closing drive means, the gas flow in the casing is allowed to flow into the inside of the plurality of dust collecting electrodes from the plurality of charging flow paths, and then the outside of the casing. Exhaust to
When the plurality of partition plates are opened by the opening / closing drive means, the attracting force generated by the attraction fan is guided to the opened portions of the plurality of partition plates, and the gas flow in the casing is changed to the plurality of partition plates. An electric dust collector , wherein the exhaust gas is exhausted from the plurality of charging flow paths to the outside of the casing without flowing into the dust collection electrode .

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