TW201306945A - Method for converting electric dust collector and electric dust collector - Google Patents

Abstract

To provide a method for converting an electric dust collector and an electric dust collector. In an electric dust collector (10) housing a fixed electrode type electric dust collector (28) in a casing (12), a converting method replaces the fixed electrode type electric dust collector (28) with a moving dust collecting electrode (46) and a discharge electrode (54) corresponding to the moving dust collecting electrode (46). A hopper (20) disposed at the lower end of the casing (12) and positioned facing the fixed electrode type electric dust collector (28) is removed to form a lower opening portion (64). A hoist (78) is disposed at a position facing the lower opening portion (64) of the casing (12). After removing the fixed electrode type electric dust collector (28), the moving dust collecting electrode (46) and the discharge electrode (54) are suspended by the hoist (78) and are carried in from the lower opening portion (64).

Description

Retrofit method of electric dust collecting device, electric dust collecting device

The present invention relates to an electric dust collecting device, and more particularly to a technique for replacing a part or all of a fixed electrode type electric dust collecting device with a moving electrode type electric dust collecting device.

There is a request for a modification/renovation project for the purpose of improving the performance of the electric dust collector by strengthening the discharge limit value of the coal dust and the deterioration of the existing electric dust collector.

Among them, the performance of the fixed electrode type electric dust collecting device that collects coal dust by fixing the dust collecting electrode is generally an additional means, but in most cases, there is no additional space around the existing equipment.

On the other hand, the moving electrode type electric dust collecting device that collects coal dust by moving the dust collecting electrode is characterized in that the coal dust adhering to the moving dust collecting electrode is highly detached by the brush, and the moving dust collecting electrode is held. Clean, as a result, even the dust collection performance is also high. Therefore, in order to improve the performance of a part or all of the fixed electrode type electric dust collector provided separately, it is extremely effective to replace it with a mobile electrode type electric dust collector.

Patent Document 1 discloses a method of loading/removing a fixed dust collecting electrode from an opening provided on a side surface of an upper portion of a casing of a fixed electrode type electric dust collecting device, and a method of updating a fixed electrode type electric dust collector. Patent Document 2 discloses an opening/removing fixed set of a hopper in which a lower end of a casing accommodating a fixed electrode type electric dust collector is removed. The method of dust electrodes.

On the other hand, in the case of the installation or renewal of the mobile electrode type electric dust collecting device, Patent Document 3 discloses a door type mobile crane which is disposed above the casing, and the opening of the hopper having the lower end of the casing removed After the part is carried into the discharge electrode and mounted, the method of moving the dust collecting electrode by the opening is carried out. Patent Document 4 discloses an endless loop that constitutes a moving dust collecting electrode mounted on a driving wheel that drives a moving dust collecting electrode, and a dust collecting electrode that constitutes a moving dust collecting electrode is continuously mounted one by one in a driving wheel near the driving wheel The method of endless loops. Patent Document 5 discloses a set in which one end of an endless loop chain is cut away, and one end of the new chain is connected to one end of the endless loop chain, and the endless loop chain is rotated around, and one end is attached to the endless loop chain. The dust electrode plate is sequentially changed to the new specification chain, and the endless chain of the dust collecting electrode plate has been completely removed at the stage of the new chain winding, and the moving set is connected by connecting one end of the new chain to the other end. A method of replacing an endless loop of a dust electrode with a new one.

Patent Document 6 discloses a configuration in which a fixed electrode type electric dust collector and a moving electrode type electric dust collector are disposed in a casing, and a fixed electrode type electric dust collector is disposed upstream of an exhaust gas passing through the casing. The moving electrode type electric dust collecting device is disposed on the downstream side of the exhaust gas. Therefore, the coal dust having a large particle size can be collected by the fixed electrode type electric dust collecting device in the front stage, and the coal dust having a small particle size which is difficult to obtain by the fixed electrode type electric dust collecting device can be collected by the mobile electrode type electric dust collecting device in the subsequent stage. . Therefore, it is preferable to form a configuration similar to that of Patent Document 6 after the fixed electrode type electric dust collector is modified.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 7-96214

[Patent Document 2] Japanese Patent Laid-Open No. Hei 9-290177

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2000-342993

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2000-342996

[Patent Document 5] Japanese Patent Laid-Open Publication No. 2000-342995

[Patent Document 6] Japanese Laid-Open Patent Publication No. SHO 57-32742

However, the configuration of Patent Document 6 is designed such that the fixed electrode type electric dust collecting device and the moving electrode type electric dust collecting device can be appropriately disposed. Further, in the fixed electrode type electric dust collecting device and the moving electrode type electric dust collecting device, not only the size (height) of the device but also the height position of the field in which the exhaust gas can effectively collect the coal dust is different. Therefore, in the conventional fixed electrode type electric dust collection, in order to realize the configuration of Patent Document 6, it is necessary to remanufacture the portion in which the moving electrode type electric dust collecting device is mounted in the outer casing, which is costly.

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an electric set in which a part or all of a fixed electrode type electric dust collecting device can be replaced with a mobile electrode type electric dust collecting device in a form in which an existing outer casing can be used as it is. Method for modifying a dust device, and electrical system formed by the method Dust collecting device.

In order to achieve the above object, a method for retrofitting an electric dust collector according to the present invention is a first embodiment of an electric dust collector in which a fixed electrode type electric dust collector is disposed in a casing, characterized in that the fixed electrode type electric set is used. The dust device is replaced with a moving dust collecting electrode and a discharge electrode corresponding to the moving dust collecting electrode.

According to the above method, the existing fixed-electrode dust collecting device can be replaced with a moving electrode type electric dust collecting device composed of a moving dust collecting electrode and a discharge electrode without using a redesigned outer casing, and the existing outer casing can be used. Increase the processing capacity of the exhaust gas.

Secondly, the fixed electrode type electric dust collector is provided with a plurality of stages in the flow direction of the exhaust gas flowing through the outer casing in the outer casing, and the aforementioned electric dust collector is a part or all of the above-mentioned stationary electric dust collectors. After the fixed electrode type electric dust collector is removed, the moving dust collecting electrode and the discharge are extremely characterized in that the fixed electrode type electric dust collecting device is removed.

According to the above method, the degree of modification of the electric dust collector can be changed in accordance with the number of stages of the fixed electrode type electric dust collector to be removed or the size of the moving dust collecting electrode.

Third, the hopper which is located at a position facing the fixed electrode type electric dust collector at the lower end of the outer casing is removed to form a lower opening, and the crane is placed at a position facing the lower opening of the outer casing. The moving dust collecting electrode and the discharge electrode are carried by the lower opening portion by being suspended by the crane.

According to the above method, since it is not necessary to lift the dust collecting electrode and the discharge electrode so as to straddle the outer casing, it can be efficiently carried into the outer casing. Further, since the discharge electrode and the moving dust collecting electrode are suspended by the crane supported by the outer casing, the conventional fixed electrode type electric dust collecting device which is difficult to secure the working space can be efficiently moved in. Electrode type electric dust collector.

Fourthly, the upper unit is disposed at a position between the crane and the lower opening, and the upper unit has a frame having an insertion hole that communicates with the lower opening, and an orientation and a housing in the housing a plurality of upper rollers supported in the insertion hole and supported by the upper end of the moving dust collecting electrode in a state in which the flow path of the exhaust gas flowing therein is arranged in a vertical direction, and has a direction facing the upper drum The lower unit of the plurality of lower rollers that are arranged to support the lower end of the moving dust collecting electrode is characterized in that it is carried by the lower opening portion by being continuously fed from the crane and the wire inserted through the insertion hole.

According to the above method, it is not necessary to review the installation position of each moving dust collecting electrode at the setting site, and the installation of the plurality of moving dust collecting electrodes can be easily performed by avoiding interference between the crane and the upper unit.

Fifthly, the hopper is suspended by the crane to seal the lower opening.

By the above method, the hopper can be easily hoisted, and the lower opening can be easily sealed.

Sixth, in a position facing the insertion hole on the upper unit, a rail having a longitudinal direction in a direction perpendicular to a flow path of the exhaust gas passing through the outer casing is attached, and the crane is repeatedly The moving dust collecting electrode may be mounted on the rails so as to be movable along the rails, and the crane is moved to hang a new moving dust collecting electrode, thereby moving the moving dust collecting electrode toward The flow path of the aforementioned exhaust gas is characterized by a plurality of vertical directions.

According to the above method, even in the conventional fixed electrode type electric dust collector in which it is difficult to secure the working space, the discharge electrode can be efficiently carried in, and the plurality of moving dust collecting electrodes can be efficiently carried.

Seventh, an upper opening portion is formed at a position facing the fixed electrode type electric dust collector at an upper end of the outer casing, and is arranged in a direction perpendicular to a flow path of the exhaust gas flowing through the outer casing. The lower unit of the plurality of lower rollers that are supported to support the lower end of the moving dust collecting electrode is placed in the outer casing by the upper opening, and is disposed in such a manner as to face the lower drum. The upper unit of the plurality of upper rollers supported to support the upper end of the moving dust collecting electrode is disposed at a position facing the upper opening portion of the casing.

According to the above method, it is not necessary to review the installation position of each of the moving dust collecting electrodes at the setting site, and the installation of the plurality of moving dust collecting electrodes can be easily performed.

According to a eighth aspect, the upper unit has an insertion hole that communicates with the upper opening, and the upper roller is supported in the insertion hole. The moving dust collecting electrode is carried by the insertion hole.

According to the above method, the moving dust collecting electrode can be carried into the outer casing without interfering with the upper unit.

In the ninth aspect, the outer casing is disposed at a position facing the upper opening portion of the outer casing, and the upper end of the outer casing is extended.

According to the above method, the dust collecting electrode can be moved in the existing housing configuration without being limited to the height of the moving dust collecting electrode.

According to a tenth aspect, a guide plate is disposed which guides the exhaust gas reaching the flow path of the exhaust gas to a lower portion of the lower end of the discharge electrode to a position higher than a lower end of the discharge electrode. It is characterized by it.

According to the above method, it is possible to suppress the passage of the exhaust gas to the lower portion of the moving dust collecting electrode which is less likely to trap the coal dust than the discharge electrode, and to effectively capture the coal dust in the exhaust gas.

According to a first aspect of the present invention, in an electric dust collecting device of the present invention, there is provided an outer casing for circulating an exhaust gas, and a fixed electrode type electric dust collecting device which is disposed in the outer casing The upstream side of the flow path; the moving dust collecting electrode is disposed on the downstream side of the flow path of the exhaust gas, and the plurality of connected dust collecting electrodes are integrally formed to form a loop for revolving; The guide plate is disposed at a position facing the moving dust collecting electrode; and the guide plate is disposed in a field in which the flow path of the exhaust gas is lower than a lower end of the discharge electrode, and reaches the aforementioned field. The aforementioned exhaust gas is guided to a position higher than the lower end of the discharge electrode.

With the above configuration, it is possible to suppress the passage of exhaust gas to the point where it is difficult to capture coal dust The moving dust collecting electrode is more in the lower area than the discharge electrode, and can effectively capture the coal dust in the exhaust gas.

Secondly, in the moving dust collecting electrode, a plurality of lower rollers that are arranged in a direction perpendicular to the flow path and support the lower end of each of the moving dust collecting electrodes are supported by a lower unit, and the guide is attached to the lower unit The board is characterized by it.

According to the above configuration, since the guide plate is attached to the lower unit, the guide plate can be easily disposed.

Thirdly, an exhaust gas diffusion means is disposed between the fixed electrode type electric dust collector and the moving dust collecting electrode.

According to the above configuration, the exhaust gas is spread over the entire dust collecting electrode, and the coal dust can be efficiently collected by the exhaust gas.

According to a fourth aspect of the invention, in the fixed electrode type electric dust collector, a plurality of stages are disposed in a direction of a flow path of an exhaust gas flowing through the outer casing, and the moving dust collecting electrode is attached to the fixed electrode type electric dust collecting device. The position after the removal of the aforementioned fixed electrode type electric dust collecting device in some or all of the segments is characterized.

According to the above method, the degree of modification of the electric dust collector can be changed in accordance with the number of segments of the fixed electrode type electric dust collector to be removed.

According to a fifth aspect of the invention, in the fixed-electrode type dust collecting device, a plurality of stages are disposed in a direction of a flow path of the exhaust gas flowing through the outer casing, and the wide range of the moving dust collecting electrode is formed in a wider electric system than the fixed electrode type. The width of the dust device is wide, and the moving dust collecting electrode is attached to the aforementioned fixed electrode type electric dust collecting device in at least two or more sections. The position after the fixed electrode type electric dust collector is removed is characterized.

According to the above configuration, the movable dust collecting electrodes can be disposed in the outer casing without being widened.

Sixth, a diffusion space for diffusing the exhaust gas is formed between the moving dust collecting electrode and the fixed electrode type electric dust collecting device, and the exhaust gas diffusing means is characterized by being disposed in the diffusion space.

According to the above configuration, it is possible to ensure the diffusion of the exhaust gas by the exhaust gas diffusion means efficiently by ensuring a long flow path required for diffusing the exhaust gas.

According to a seventh aspect, the upper opening is formed at a position facing the moving dust collecting electrode at an upper end of the outer casing, and an extended outer casing is disposed at a position facing the upper opening of the outer casing, and an upper end of the outer casing is Extended is characterized by it.

According to the above configuration, the dust collecting electrode can be moved in the conventional housing arrangement without being limited to the height of the moving dust collecting electrode.

The retrofitting method of the electric dust collecting device of the present invention and the electric dust collecting device formed by the method can be installed in the outer casing of the existing fixed electrode type electric dust collecting device without securing a large working space. The mobile electrode type electric dust collecting device is configured, and the coal dust collecting ability in the exhaust gas of the entire casing can be improved.

Hereinafter, the present invention will be described in detail using the embodiments shown in the drawings. However, the components, the types, the combinations, the shapes, the relative arrangements, and the like described in the embodiments are not intended to limit the scope of the invention, and are merely illustrative examples.

Fig. 1 is a perspective view showing an electric dust collecting device (one stage of a fixed electrode type electric dust collecting device and a stage of a moving electrode type electric dust collecting device) of the present embodiment. In addition, FIG. 2 is a front view showing an electric dust collector (four stages of a fixed electrode type electric dust collector and two stages of a moving electrode type electric dust collector) of the present embodiment. Next, a partial enlarged view of the second stage of the moving electrode type electric dust collector of Fig. 2 is shown in Fig. 3. 4 is a side view showing the electric dust collector of the embodiment, FIG. 4(a) is a side view showing the fixed electrode type electric dust collector, and FIG. 4(b) is a mobile electrode type electric dust collecting. Side view of the device. In addition, any of the above illustrations is an electric dust collector which has been modified by the modification method of the electric dust collector of this embodiment.

The electric dust collectors before the retrofitting method of the electric dust collector according to the present embodiment are all disposed in the casing and are fixed electrode type electric dust collectors 28. Next, in the present embodiment, the focus is on replacing a part (or all) of the fixed electrode type electric dust collector 28 with the moving electrode type electric dust collector 44.

The electric dust collector 10 after the reforming includes a casing 12 through which the exhaust gas flows, a fixed electrode type electric dust collector 28 disposed on the upstream side of the flow path of the exhaust gas in the casing 12, and the exhaust gas disposed in the exhaust gas On the downstream side of the flow path, the plurality of dust collecting electrode plates 48 are connected by The moving dust collecting electrode 46 that surrounds the entire circumference and forms a loop, and the discharge electrode 54 (the discharge electrode 55, see FIG. 14) disposed inside the loop and facing the moving dust collecting electrode 46. Further, there is provided a guide plate 94 which is disposed in a field in which the flow path of the exhaust gas is lower than a lower end of the discharge electrode 54 (discharge electrode 55), and guides the aforementioned exhaust gas reaching the aforementioned field to a ratio The lower end of the discharge electrode 54 (discharge electrode 55) is at a higher position. Further, the position of the upper end of the outer casing 12 facing the moving dust collecting electrode 46 is extended by the height of the upper end of the moving dust collecting electrode 46 (upper unit 66).

Hereinafter, the electric dust collector 10 will be described in detail, and the modification method of the first embodiment and the modification method of the second embodiment will be described.

The modified electric dust collector 10 (see FIG. 1) is formed by the outer casing 12, and is supported by a plurality of pillars 14 and is disposed at a certain height to be placed in a factory or the like. An inlet flue 16 into which an exhaust gas from a boiler or a factory of a power generation station flows in is formed on the front surface of the outer casing 12. Further, an outlet flue 18 for discharging the exhaust gas after the coal dust collection is formed on the opposite side of the outer casing 12 opposite to the inlet flue 16. Therefore, a flow path of the exhaust gas is formed in the outer casing 12 along a line connecting the inlet flue 16 and the outlet flue 18.

Further, on the lower surface of the casing 12, a hopper 20 having a pyramid shape is attached in a state of being arranged in an array. When the hopper 20 is removed, a lower opening portion 64 (see FIG. 6) which will be described later is formed under the outer casing 12. Next, a fixed electrode type electric dust collector 28 is disposed on the upstream side of the exhaust gas flow path of the outer casing 12, and a moving electrode type is disposed on the downstream side. Electrical dust collector 44. Further, between the inlet flue 16 of the outer casing 12 and the fixed electrode type electric dust collector 28, a plurality of openings 26 are formed on the main surface thereof so as to block the entire flow path of the exhaust gas. A gas distribution plate 24 of a porous configuration. The gas distribution plate 24 supplies a certain resistance to the inflowing exhaust gas to flow to the opening portion 26, whereby the exhaust gas flows uniformly in the outer casing, and the coal dust can be efficiently collected.

The fixed electrode type electric dust collector 28 is configured such that the dust collecting electrode 42 and the discharge electrode 30 are suspended from the upper end of the outer casing 12. The fixed dust collecting electrode 42 is disposed so as to be suspended from the upper end of the outer casing 12, and is disposed such that the normal line of the main surface is perpendicular to the direction of the flue of the exhaust gas. Next, the fixed dust collecting electrode 42 is arranged in a plurality of rows at regular intervals in the normal direction.

The discharge electrode 30 is disposed at a position where the main surface faces the main surface of the fixed dust collecting electrode 42 at a predetermined interval. Therefore, the discharge electrode 30 and the fixed dust collecting electrode 42 are alternately arranged in a line in a direction perpendicular to the flow path of the exhaust gas. Next, the discharge electrode 30 is connected to the discharge electrode frame 32 at both ends of the flow path side. Here, the fixed dust collecting electrode 42 is disposed at a position closest to the discharge electrode 30. Therefore, when a negative voltage is applied to the discharge electrode 30 and negative ions are released by the discharge electrode 30, the negative ions that are released propagate toward the fixed dust collecting electrode 42.

The discharge electrode frame 32 has a member having a beam 32a having a longitudinal direction in the arrangement direction of the discharge electrode 30, and the discharge electrode 30 is connected to the beam 32a. Next, the discharge electrode frame 32 is connected to the discharge electrode frame holder 34 which is suspended from the upper end of the outer casing 12.

The electrode frame holder 34 is a rod-like member that is suspended from the lower portion of the insulating tube chamber 38. Next, the electrode frame holder 34 supports the discharge electrode frame 32 in a state of penetrating through the conical insulator 36 provided in the insulating tube chamber 38. Therefore, the electrode holder support member 34 is supported by the insulating tube chamber 38 through the obstruction 36 and electrically insulated from the insulating tube chamber 38 (the outer casing 12). Therefore, the electrode frame holder 34, the electrode frame 32, and the discharge electrode 30 are electrically insulated from the outer casing. Among them, the insulating tube chamber 38 is sealed, and the surface of the intrusion 36 is prevented from dew condensation by heat preservation to prevent leakage. Further, the electrode frame holder 34 is electrically connected to the charging device 40 disposed outside the casing 12.

Here, the outer casing 12 is grounded, so that the fixed dust collecting electrode 42 directly connected to the outer casing 12 is also grounded. On the other hand, the electrode holder support member 34 is applied with a negative high voltage by the charging device 40, whereby the discharge electrode frame 32 and the discharge electrode 30 are also applied with a negative high voltage. Therefore, the negative ions are emitted from the discharge electrode 30 in a direction crossing the flow path of the exhaust gas, and propagate toward the fixed dust collecting electrode 42. In this state, when the exhaust gas is carried in from the inlet flue 16, the negative ions adhere to the coal dust in the exhaust gas, and the coal dust is negatively charged and adheres to the fixed dust collecting electrode 42, thereby removing the coal dust in the exhaust gas. Then, by fixing the dust collecting electrode 42 by a tweezers (not shown), the coal dust adhering to the fixed dust collecting electrode 42 can be knocked off and concentrated at the lower end of the hopper 20, and passed through the discharge port 22 provided at the lower end of the hopper 20. The coal dust is discharged from the outer casing 12.

A fixed electrode type electric dust collector 28 composed of the fixed dust collecting electrode 42, the discharge electrode 30, the discharge electrode frame 32, the discharge electrode frame holder 34, and the like A plurality of sections are disposed in the outer casing 12 in the flow direction of the exhaust gas, but the number of the sections is arbitrarily designed according to specifications.

The moving electrode type electric dust collecting device 44 has a moving dust collecting electrode 46, a discharge electrode 54, an upper unit 66, a lower unit 84, and the like. The moving dust collecting electrode 46 is connected in a line through a pair of loop-shaped chains 52, and is constituted by a plurality of collecting dust electrode plates 48 forming a loop. The dust collecting electrode plate 48 has its main surface arranged in parallel with the flow path direction of the exhaust gas, and the connecting member 50 is extended from both ends in the flow path direction of the exhaust gas, and the connecting member 50 is connected to the chain 52. The loop of the moving dust collecting electrode 46 is a circular arc in which the upper end and the lower end form a loop, and the other portions have a shape as directed in the vertical direction. Similarly to the fixed dust collecting electrode 42 of the fixed electrode type electric dust collector 28, the moving dust collecting electrode 46 is arranged at a predetermined interval in a direction perpendicular to the flow path of the exhaust gas.

The discharge electrode 54 is disposed at a position where the main surface faces the main surface of the moving dust collecting electrode 46 at a predetermined interval. At this time, the discharge electrode 54 is disposed inside the loop formed by the moving dust collecting electrode 46 and disposed between the adjacent moving dust collecting electrode 46.

Therefore, the discharge electrode 54 and the moving dust collecting electrode 46 are arranged in a line in a direction perpendicular to the flow path of the exhaust gas. Next, the discharge electrode 54 is connected to the discharge electrode frame 56 at both ends of the flow path side. Here, the moving dust collecting electrode 46 is disposed at a position closest to the discharge electrode 54. Therefore, when a negative high voltage is applied to the discharge electrode 54 and negative ions are released from the discharge electrode 54, the negative ions that are emitted propagate toward the moving dust collecting electrode 46.

The electrode frame 56 has a long side in the arrangement direction of the discharge electrode 54 The member of the beam 56a in the direction is connected to the discharge electrode 54 at the beam 56a. Next, the discharge electrode frame 56 is connected to the discharge electrode frame holder 58 which is suspended from the upper end of the outer casing 12.

The electrode frame holder 58 is a rod-like member that is suspended from the lower portion of the insulating tube chamber 60. Next, the electrode frame holder 58 supports the discharge electrode frame 56 in a state of penetrating through the conical insulator 62 provided in the insulating tube chamber 60. Therefore, the electrode holder support member 58 is supported by the insulating tube chamber 60 through the obstruction 62 and electrically insulated from the insulating tube chamber 60 (the outer casing 12). Further, the electrode frame holder 58 is electrically connected to a charging device 40 or the like provided outside the casing 12. Therefore, the electrode frame holder 58, the discharge electrode frame 56, and the discharge electrode 54 are electrically insulated from the outer casing 12. The insulating tube chamber 60 is disposed at a position around the upper opening portion 100 of the outer casing 12, and extends in a longitudinal direction of the discharge electrode frame 56 (a direction perpendicular to the flow path of the exhaust gas). The occlusion 62 covering the electrode frame holder 58 is held inside.

In the moving dust collecting electrode 46, if the upper end is designed to be higher than the fixed dust collecting electrode 42 of the fixed electrode type electric dust collecting device 28, it interferes with the upper end of the outer casing 12. Therefore, the upper opening portion 100 (see FIG. 6) is formed at a position facing the moving dust collecting electrode 46 at the upper end of the outer casing 12, and the moving dust collecting electrode 46 is formed to protrude from the upper end of the outer casing 12. Next, the upper portion of the outer casing 12 is covered by the extended outer casing (the elongated member 82, the insulating tube chamber 60, the upper unit 66, and the upper cover 74) so as to cover the periphery of the upper opening portion 100. Therefore, the position of the upper end of the outer casing 12 opposite to the moving dust collecting electrode 46 (the upper unit 66) is formed toward the height side. To the extended form.

The extension member 82 is a member that extends the upper end of the outer casing, and has an opening portion that communicates with the upper opening portion 100 at the upper end and the lower end thereof. The upper cover member 74 has an opening at the lower end. Further, the upper unit 66 is a component of the mobile electrode type electric dust collector 44, and is integrated with the extension casing. Therefore, the moving dust collecting electrode 46 is housed in the inner space formed by the outer casing 12, the elongated outer casing (the elongated member 82, the insulating tube chamber 60, the upper unit 66, and the upper cover 74). Thereby, the movable electrode type electric dust collector 44 can be attached to the conventional casing 12 without sticking to the height of the dust collecting electrode 46.

Here, the width of the extension member 82, the insulating tube chamber 60, the upper unit 66, the upper cover member 74, and the lower unit 84 is substantially the same as the width of the flow path of the exhaust gas of the hopper 20, but with the exhaust gas. The direction in which the flow path is perpendicular is appropriately designed in accordance with the number of rows in which the dust collecting electrode 46 and the discharging electrode 54 are arranged. The width direction of the exhaust gas in the upper opening portion 100 has a size that does not interfere with the movement of the dust collecting electrode 46 inserted into the upper opening portion, and the upper opening portion 100 is perpendicular to the exhaust gas flow path. The width of the direction is appropriately designed in accordance with the number of rows in which the dust collecting electrode 46 and the discharging electrode 54 are arranged.

Fig. 5 is a partial schematic view showing the electric dust collector of the embodiment, Fig. 5(a) is a plan view showing the upper cover of the movable electrode type electric dust collector, and Fig. 5(b) is a mobile electrode type electric A plan view of an upper unit of the dust collecting device, and Fig. 5 (c) is a plan view of a lower unit constituting the moving electrode type electric dust collecting device.

The upper unit 66 is disposed at a position between the crane 78 and the lower opening portion 64 which will be described later. The upper unit 66 is formed into an outer shape by a frame body 68 having an insertion hole 68a that communicates with the upper opening portion 100 and the lower opening portion 64. Further, the frame body 68 has a longitudinal direction in the direction in which the moving dust collecting electrodes 46 are arranged. Then, in a state in which it is arranged in a direction perpendicular to the flow path of the exhaust gas flowing through the casing 12, the upper portion of the upper end of the moving dust collecting electrode 46 is supported by the insertion hole 68a. Roller 69 (rotary shaft 70, drive wheel 72).

The upper roller 69 has a rotating shaft 70 supported by the frame body 68 and emulating the arrangement of the moving dust collecting electrodes 46; the upper end of the moving dust collecting electrode 46 is supported by the meshing with the chain 52 (forming a circular arc) Positioned, and rotated together with the rotating shaft 70, thereby driving the collecting wheel 72 that moves the dust collecting electrode 46 along the chain 52; and a motor (not shown) that rotates the rotating shaft 70. Both ends of the rotating shaft 70 in the longitudinal direction are connected to the side surface of the flow path of the insertion hole 68a. Therefore, the upper roller 69 is arranged in a plurality of directions in which the dust collecting electrodes 46 are arranged at a position where the loop arc of the moving dust collecting electrode 46 is formed.

The upper cover member 74 is a lid member that sets the direction in which the dust collecting electrode 46 is arranged in the longitudinal direction, and is disposed on the upper unit 66. Further, a pair of rails 76 that define the direction in which the discharge electrodes 54 are arranged in the longitudinal direction are attached to the upper surface (or the side surface) of the inner wall of the upper cover member 74, and at least two or more hangers are attached to the rails 76. Machine 78.

The crane 78 is movable along the longitudinal direction of the rail 76, and can be carried by the article loaded by adjusting the length of the continuously discharged wire 80. Wait. Among them, the rail 76 and the crane 78 are disposed at positions where the wire 80 continuously discharged from the crane 78 can be inserted into the insertion hole 68a.

The lower unit 84 has a frame body 86 that has a longitudinal direction in the direction in which the dust collecting electrode 46 is arranged in the same direction as the upper unit 66 and is connected to the outer casing 12, and is arranged to face the upper drum 69. In the state of being supported by the frame 86, the plurality of lower rollers 87 (the rotating shaft 88 and the lower wheel 90) that support the lower end of the dust collecting electrode are supported.

The lower roller 87 has a rotating shaft 88 that matches the arrangement of the moving dust collecting electrodes 46; and supports the lower end of the dust collecting electrode 46 (the position at which the loop is formed) by being engaged with the chain 52, and accepts The force of the chain 52 as a loop (revolving motion), together with the lower wheel 90 that rotates with the rotating shaft 88. The rotation shaft 88 is arranged in a plurality of ways so as to be directly below the rotation shaft 70 supported by the upper unit 66.

Further, the lower unit 84 is a columnar member which is supported by the frame 86 and has a longitudinal direction in a direction perpendicular to the arrangement direction of the moving dust collecting electrode 46, and has a set which constitutes the moving dust collecting electrode 46 by being sandwiched by both faces. A pair of rotating brushes 92 are disposed in the manner of the dust electrode plate 48. The rotating brush 92 is connected to a motor (not shown) that rotates the rotating brush 92 outside, for example, such that its central axis extends to the outside of the casing 12. Next, as shown in FIG. 4(b), the pair of rotating brushes 92 are rotated in opposite directions to each other, and the outer circumferential traveling direction of the rotating brush 92 on the side opposite to each other by the pair of rotating brushes 92 and the dust collecting electrode plate are shown. The traveling directions of 48 are rotated in opposite directions to each other. Therefore, the rotating brush 92 can remove the coal dust adhering to the surface (both sides) of the dust collecting electrode plate 48, and the removed coal dust is not It is again wound up into the rotating brush 92 and the dust collecting electrode plate 48 and deposited on the lower end of the hopper 20.

With the above arrangement, the moving dust collecting electrode 46 rotates the driving wheel 72 as the upper end and the lower wheel 90 as the lower end. On the other hand, since the discharge electrode 54 does not propagate the negative ions to a portion other than the moving dust collecting electrode 46, the lower end thereof is disposed above the lower unit 84, and the upper end thereof is disposed below the upper unit 66. Therefore, it is extremely difficult to effectively remove the coal dust from the exhaust gas at the height position of the lower end of the discharge electrode 54 from the lower end of the lower unit 84. Further, as in the present embodiment, the dust collecting electrode 46 and the discharge electrode 54 are provided to have a larger size than the collecting electrode plate 48 of the fixed electrode type electric dust collecting device 28. Therefore, in the case 12, when the dust collecting electrode 46 and the discharging electrode 54 are disposed in the rear stage of the fixed electrode type electric dust collecting device 28, the exhaust gas does not spread over the entire dust collecting electrode 46 and the discharging electrode 54. situation.

Therefore, as shown in FIGS. 2 and 3, guide plates 94 are attached to both ends of the flow path side of the exhaust gas of the lower unit 84. The guide plate 94 is disposed such that the lower end is connected to the hopper 20, and the upper end is disposed at substantially the same height as the lower end of the discharge electrode 54, and the flow path of the exhaust gas is blocked between the lower end and the upper end of the guide plate 94. Thereby, the exhaust gas reaching the region lower than the lower end of the discharge electrode 54 of the flow path of the exhaust gas can be guided to a position higher than the lower end of the discharge electrode 54. Therefore, it is possible to effectively trap the coal dust in the exhaust gas by suppressing the passage of the exhaust gas to a lower area than the discharge electrode 54 (the discharge electrode 55, see FIG. 14) of the moving dust collecting electrode 46 which is not easy to collect the coal dust. Wherein, the guiding plate 94 and the discharge electrode 54 are formed to be incompatible with each other. . As described above, since the guide plate 94 is mounted to the lower unit 84, the arrangement of the guide sheets 94 can be easily performed.

Further, as shown in FIG. 2, the fixed electrode type electric dust collector 28 and the moving electrode type electric dust collector 44 have the same structure as the gas distribution plate 24, and an inlet distribution plate serving as a discharge gas diffusion means is disposed. 96. The mobile electrode type electric dust collector 44 (moving dust collecting electrode 46, discharge electrode 54) uniformly flows into the exhaust gas. Further, an outlet distribution plate 98 having the same configuration as that of the inlet distribution plate 96 is disposed on the downstream side of the exhaust gas of the mobile electrode type electric dust collector 44, and is suppressed from the inlet distribution plate 96 and the outlet distribution plate 98 of the exhaust gas. The field of the lap, that is, the flow rate of the portion of the moving electrode type electric dust collector 44 that discharges the gas, can efficiently capture the coal dust.

In the above configuration, the upper unit 66 and the lower unit 84 are connected to the outer casing 12, so that they are grounded, whereby the moving dust collecting electrode 46 connected to the upper unit 66 (drive wheel 72) and the lower unit 84 (lower wheel 90) is also Ground. On the other hand, the discharge electrode 54, the discharge electrode frame 56, and the discharge electrode frame holder 58 are insulated by the outer casing 12 to apply a negative high voltage. Therefore, the negative ions are discharged from the discharge electrode 54 to the direction intersecting the flow path of the exhaust gas, and propagate to the dust collecting electrode plate 48 constituting the moving dust collecting electrode 46. In this state, when the exhaust gas is carried in from the inlet flue 16, the negative ions adhere to the coal dust that has passed through the exhaust gas of the fixed electrode type electric dust collector 28, and the coal dust is negatively charged and adheres to the dust collecting electrode plate 48. Remove coal dust from the exhaust gas. Then, the exhaust gas from which the coal dust has been removed is discharged from the outlet flue 18.

Further, when the dust collecting electrode plate 48 abuts against the rotating brush 92, the coal dust adhering to the dust collecting electrode plate 48 is swept by the rotating brush 92 and accumulated in the lower end of the hopper 20. Next, coal dust can be discharged from the outer casing 12 through the discharge port 22 provided at the lower end of the hopper 20.

The moving electrode type electric dust collector 44 composed of the moving dust collecting electrode 46, the discharge electrode 54, and the like is provided with a plurality of sections in the direction of the flow path of the exhaust gas in the casing 12, but the number of stages is in accordance with the modified specifications. Arbitrary design.

The retrofitting of the electric dust collector of the first embodiment is shown in Figs. 6 to 13 . Here, FIG. 6 is a front view. Further, in FIGS. 7 to 13, (a) is a front view and (b) is a side view.

A case where the fixed electrode type electric dust collector 28 on the right side of the fixed electrode type electric dust collector shown in FIG. 6(a) is replaced with the moving electrode type electric dust collector 44 will be described. First, as shown in FIG. 6(b), the hopper 20 directly under the fixed electrode type electric dust collector 28 to be removed is removed to form the lower opening portion 64, and the fixed electrode at the upper end of the outer casing 12 is removed. The upper opening portion 100 is formed at a position facing the electric dust collector 28. Next, the fixed electrode type electric dust collector 28 is removed from the lower opening portion 64 or the upper opening portion 100 by using a crane (not shown) or the like.

Next, as shown in FIG. 6(c), the extension member 82 and the insulating tube chamber 60 are suspended by a crane (not shown) or the like and attached to the position of the upper opening portion 100 surrounding the outer casing 12. At this time, the intrusion 62 and the electrode frame holder 58 are previously mounted in the insulating tube chamber 60. And you can also install the inlet distribution at this time. Plate 96 (and outlet distribution plate 98 (not shown)). Next, as shown in FIG. 6(d), the upper unit 66 and the upper cover 74 are suspended by a crane (not shown) or the like and attached to the insulating tube chamber 60.

Next, the discharge electrode frame 56 is disposed below the lower opening portion 64, and as shown in FIG. 7, the wire member 80 is continuously discharged by the crane 78 attached to the upper cover member 74, so that the wire member 80 is inserted into the insertion hole 68a and Upper opening portion 100. Next, the wire 80 is attached to the discharge electrode frame 56 and suspended, and the lower electrode opening 56 is carried into the discharge electrode frame 56. Next, the discharge electrode frame 56 is connected to the discharge electrode frame holder 58 by welding or the like.

Then, the discharge electrode 54 is placed below the lower opening portion 64, and as shown in FIG. 8, the wire 80 is continuously discharged by the crane 78 in the same manner as described above, and the discharge electrode 54 is suspended, and the discharge electrode 54 is carried by the lower opening portion 64. . Next, the discharge electrode 54 is connected to the discharge electrode frame 56 by welding or the like. At this time, the operation of causing the crane 78 to appropriately move on the rail 76 to sequentially suspend the plurality of discharge electrodes 54 and connect them to the discharge electrode frame 56 is performed.

Next, a pair of moving dust collecting electrodes 46a in which the chain 52 is divided into two are disposed below the lower opening portion 64, and as shown in Fig. 9, a balance 78a is attached to the tip end of the continuously discharged wire member 80, by which the balance 78a The pair of moving dust collecting electrodes 46a are suspended, and the pair of moving dust collecting electrodes 46a are carried by the lower opening portion 64. Next, as shown in FIG. 10, the moving dust collecting electrode 46a is suspended to a height exceeding the upper end of the driving wheel 72 mounted on the upper unit 66. At this time, the pair of moving dust collecting electrodes 46 are suspended to a position where the driving drive wheels 72 are opposed to each other. Next, the chain 52a is removed by the crane 78 to connect the chains 52a to each other, and is engaged with the driving wheels 72. . At this time, the rotation of the rotary shaft 70 is locked so that the movable dust collecting electrode 46 does not fall off by the drive wheel 72.

Further, at this time, the operation of appropriately moving the crane 78 on the rail 76 to suspend the pair of moving dust collecting electrodes 46a in order to connect the moving dust collecting electrodes 46a to each other is performed. Thereby, the moving dust collecting electrode 46 (the discharge electrode 54) is arranged in a line in a direction perpendicular to the flow path of the exhaust gas.

Next, the lower unit 84 is disposed below the lower opening portion 64, and as shown in FIG. 11, the lower unit 84 is suspended by the crane 78, and the lower unit 84 is carried by the lower opening portion 64. Next, in a state in which one of the pair of moving dust collecting electrodes 46a is inserted between the pair of rotating brushes 92 attached to the lower unit 84, the lower unit 84 is suspended to a pair of moving dust collecting electrodes 46a. The lower wheel 90 is in a position facing each other. Next, the chains 52a which become the lower ends of the pair of moving dust collecting electrodes 46a are connected to each other as the chain 52 forming the loop, and are engaged with the lower wheel 90. Thereby, the moving dust collecting electrode 46 is disposed at a position facing the discharge electrode 54 in a state in which the entire collecting electrode plate 48 is formed in a loop by the plurality of collecting electrode plates 48. Further, the lower unit 84 is coupled to the outer casing 12. At this time, the guide plate 94 is previously attached to the lower unit 84 before the lower unit 84 is suspended.

Finally, the previously added hopper 20 is disposed below the lower opening portion 64, and the hopper 20 is suspended by the balance 78a as shown in Fig. 12 through the balance 78a. Next, as shown in FIG. 13, the hopper 20 is attached to the lower end of the outer casing 12 to seal the lower opening portion 64, thereby completing the renovation work. Although the crane 78 is left after the modification, it is possible to use the maintenance work afterwards.

With the above-described retrofitting work, since it is not necessary to hang the moving dust collecting electrode 46, the discharge electrode 54, and the like across the outer casing 12, the large moving electrode type electric dust collecting device 44 can be efficiently carried into the outer casing. 12. Further, since the discharge electrode 54 and the moving dust collecting electrode 46 are suspended by the crane 78 supported by the outer casing 12, the conventional electric dust collecting device 10, which is difficult to secure the working space, can be efficiently converted into a moving electrode type. Electrical dust collector 44. Similarly, the hopper 20 can be easily hung, and the upper opening portion 100 can be easily packaged.

Further, by arranging the crane 78 that can move on the rail 76 in the upper cover 74, even in the conventional electric dust collector 10 which is difficult to secure the working space, the plurality of discharge electrodes 54 can be efficiently carried and moved. Dust collecting electrode 46.

Further, since it is not necessary to hang the moving dust collecting electrode 46 and the discharge electrode 54 across the outer casing 12, the large moving electrode type electric dust collecting device 44 can be efficiently carried into the outer casing 12. Further, by the above method, it is possible to effectively collect the coal dust in the exhaust gas by suppressing the passage of the exhaust gas to a lower area than the discharge electrode 54 of the moving dust collecting electrode 46 which is less likely to trap the coal dust.

Further, in the present embodiment, the upper roller 69 that supports the moving dust collecting electrode 46 at the upper end is connected to the upper unit 66, and the lower roller 87 that supports the moving dust collecting electrode 46 at the lower end is connected to the lower unit 84. The upper unit 66, the lower unit 84, and the set moving dust collecting electrode The position of 46 is carried into the outer casing 12 correspondingly. Thereby, it is not necessary to review the mounting position of each of the moving dust collecting electrodes 46 at the setting site, and by the insertion hole 68a formed in the upper unit 66, the interference between the crane 78 and the upper unit 66 can be avoided easily. The mounting of the plurality of moving dust collecting electrodes 46 is performed.

The above-described reforming project is formed by replacing a part (segment portion) of a plurality of fixed electrode type electric dust collectors 28 with a moving electrode type electric dust collecting device 44, but it is also applicable to a plurality of segments. Alternatively, all of the fixed electrode type electric dust collectors 28 in the outer casing 12 are replaced with the mobile electrode type electric dust collecting devices 44. Further, in the modification work of moving the next moving electrode type electric dust collecting device 44 to the side of the previously-moved mobile electrode type electric dust collecting device 44, there is no case where the moving electrode type electric dust collecting devices 44 interfere with each other. And there will be no interference with each other after the renovation project. Therefore, it is also possible to carry out the modification of replacing the fixed electrode type electric dust collecting device 28 having a plurality of stages into the moving electrode type electric dust collecting device 44 at the same time, and it is possible to carry out an efficient modification. Therefore, the degree of modification of the electric dust collector 10 can be changed in accordance with the number of stages of the fixed electrode type electric dust collector 28 to be removed.

Fig. 14 and Fig. 15 are schematic views showing a modification of the electric dust collector of the second embodiment. Fig. 14(a) shows that before the modification, Fig. 14(b) shows the work of moving into the lower unit after removing the fixed electrode type electric dust collector, and Fig. 14(c) shows that the discharge electrode is carried after the insulating tube chamber is installed. The construction of the frame, Figure 14 (d) shows the project of loading the discharge electrode. In addition Fig. 15(a) shows the upper unit installation project, Fig. 15(b) shows the moving dust collecting electrode loading project (when hanging down), and Fig. 15(c) shows the moving dust collecting electrode loading project (hanging down) After the instant), Figure 15(d) shows the installation of the upper cover.

In the retrofitting of the electric dust collector of the second embodiment, the fixed electrode type electric dust collector 28 is taken out from the upper portion of the outer casing 12, and the movable electrode type electric dust collecting device 44 is carried out without removing the hopper 20. As shown in Fig. 14 (a), in the second embodiment, the fixed electrode type electric dust collector 28 in the rear stage of the fixed electrode type electric dust collector 28 is replaced with the moving electrode type electric dust collector 44. Explain. First, as shown in FIG. 14(b), the upper opening portion 100 is formed at a position facing the fixed electrode type electric dust collector 28 to which the outer casing 12 is removed, and the fixed electrode type electric dust collecting device 28 to be removed is used as a crane. The body (not shown) is suspended and removed from the outer casing 12. Next, the lower unit 84 (the guide plate 94) is suspended by a crane (not shown), and the upper opening 100 is carried into the casing 12 to be connected to the casing 12 at the lower portion of the casing 12.

Next, as shown in FIG. 14(c), the extension member 82 and the insulating tube chamber 60 (attach the electrode frame holder 58) are sequentially suspended by a crane (not shown), and the upper portion surrounding the upper portion of the casing 12 is attached. The position of the opening portion 100 is connected, and the electrode frame 57 is suspended by a crane (not shown), and the discharge electrode frame 57 is carried by the upper opening portion 100, and the discharge electrode frame 57 is connected to the discharge electrode frame holder 58.

Next, as shown in FIG. 14(d), a crane (not shown) is used. The upper electrode 100 is carried into the discharge electrode 55 and is connected to the discharge electrode frame 57. In addition, since the discharge electrode 55 is arranged in a plurality of directions perpendicular to the flow path direction of the exhaust gas, the discharge electrode 55 is carried in and connected in plural times in accordance with the number of the discharge electrodes 55.

Next, as shown in FIG. 15(a), the upper unit 66 is suspended by a crane (not shown) and connected to the insulating tube chamber 60. Next, the crane (not shown) is used to move the dust collecting electrode 46 through the balance, and the moving dust collecting electrode 46 is inserted into the insertion hole 68a and the upper opening portion 100 of the upper unit 66 and carried into the casing 12 ( Figure 15 (b)). At this time, as shown in FIG. 16, the moving dust collecting electrode 46 is conveyed to a position engaged with the driving wheel 72 attached to the upper unit 66, and after the chain 52 having the lower end is lowered, the chain 52 is cut. The two chains 52a are hoisted down to the outer casing 12. Next, as shown in FIG. 15(c), the chain 52 of the upper end of the moving dust collecting electrode 46 is engaged with the driving wheel 72.

Finally, as shown in FIG. 15(d), in a state where the chain 52a and the lower wheel 90 are engaged with each other, the chains 52a are connected to each other to form a chain 52, and the upper cover member 75 is suspended by a crane (not shown). Connected to the upper unit 66, thereby ending the retrofitting process. In the present embodiment, it is effective to ensure that a crane (not shown) is provided outside the casing 12, or when the moving dust collecting electrode 46 or the like is small. Therefore, it is not necessary to install the rail 76 or the crane 78 in the upper cover member 75. Further, the discharge electrode frame 57 and the discharge electrode 55 have the same functions as those of the discharge electrode frame 56 and the discharge electrode 54, but they can be performed when they interfere with the end portion (or the insulating tube chamber 60) of the upper opening portion 100. Size design The change is carried out by the upper opening portion 100.

According to the above method, the fixed electrode type electric dust collector 28 can be replaced with the movable electrode type electric dust collector 44 constituted by the discharge electrode 55 and the moving dust collecting electrode 46 in the conventional casing 12. Further, since the insertion hole 68a is formed in the upper unit 66, by moving the dust collecting electrode 46 in the insertion hole 68a, the upper unit 66 is not interfered, and the moving dust collecting electrode 46 can be efficiently carried in. To the outer casing 12.

Fig. 17 shows a modification of the electric dust collector of the embodiment. As described above, in the electric dust collector 10, the fixed electrode type electric dust collector 28 is disposed in the outer casing 12 in a plurality of stages in the flow path direction of the exhaust gas flowing through the outer casing 12. Next, in the present modification, a part of the fixed electrode type electric dust collecting device 28 is removed (may also be all segments), and a moving electrode type electric set is attached at a position where the fixed electrode type electric dust collecting device 28 is removed. Dust device 45 (moving dust collecting electrode and discharging electrode).

In the first embodiment and the second embodiment, the width of the flow path of the exhaust gas of the moving electrode type electric dust collector 44 is substantially the same as the width of the fixed electrode type electric dust collector 28. To describe it. However, as shown in the case of the modification, the wide range of the moving electrode type electric dust collecting device 45 is larger than that of the fixed electrode type electric dust collecting device 28. At this time, as shown in FIG. 17, at least two consecutive sections of the fixed electrode type electric dust collector 28 are removed, and the moving electrode type electric dust collector 45 is disposed in the removed place. In Fig. 17, three consecutive sections of the flow path along the exhaust gas in the fixed electrode type electric dust collector 28 are removed. The fixed electrode type electric dust collector 28 is provided with a moving electrode type electric dust collecting device 45 at the removed position. By this, it is possible to change the electric quantity according to the number of stages of the stationary electric dust collector 28 to be removed or the size of the moving dust collecting electrode (the moving electrode type electric dust collecting device 45) (the width of the flow path of the exhaust gas). The degree of modification of the dust collecting device 10.

Further, the moving electrode type electric dust collecting device 45 is not disposed immediately behind the fixed electrode type electric dust collecting device 28, as shown in Fig. 17, to form a diffusion space 102 for promoting the diffusion of the exhaust gas. Next, it is preferable to arrange the above-described inlet distribution plate 96 in the diffusion space 102. Thereby, the flow path length required for diffusing the exhaust gas can be ensured to efficiently perform the diffusion of the exhaust gas by the inlet distribution plate 96.

The moving electrode type electric dust collector 45 shown in FIG. 17 has substantially the same width as the moving electrode type electric dust collector 44 described in the first embodiment and the second embodiment. The constituent elements shown in the reference numerals in Fig. 17 are the same as those shown in the same reference numerals in Fig. 2 and the like. The movement of the mobile electrode type electric dust collector 45 to the outer casing 12 can be performed by the modification methods of the first embodiment and the second embodiment, and thus detailed description thereof will be omitted. Thereby, it is possible to arrange the same in the outer casing 12 without being limited to the width of the moving dust collecting electrode 46.

[Industrial Applicability]

It can be used as a conventional housing containing a fixed electrode type electric dust collector, and the fixed electrode type electric dust collector can be replaced by a discharge electrode and a shift A method of modifying a moving electrode type electric dust collecting device comprising a moving dust collecting electrode and an electric dust collecting device manufactured by using the reforming method are used.

10‧‧‧Electrical dust collector

12‧‧‧ Shell

14‧‧‧ pillar

16‧‧‧Inlet flue

18‧‧‧Export flue

20‧‧‧ hopper

22‧‧‧Export

24‧‧‧ gas distribution board

26‧‧‧ openings

28‧‧‧Fixed electrode type electric dust collector

30‧‧‧Discharge electrode

32‧‧‧electrode frame

32a‧‧ ‧ beams

34‧‧‧Electrode frame support

36‧‧‧

38‧‧‧Insulated tube room

40‧‧‧Power equipment

42‧‧‧Fixed dust collecting electrode

44‧‧‧Mobile electrode type electric dust collector

45‧‧‧Mobile electrode type electric dust collector

46‧‧‧Mobile dust collecting electrode

46a‧‧‧Mobile dust collecting electrode

48‧‧‧Dust electrode plate

50‧‧‧Connecting components

52‧‧‧Chain

52a‧‧‧Chain

54‧‧‧displacement electrode

55‧‧‧Discharge electrode

56‧‧‧electrode frame

56a‧‧ ‧ beams

57‧‧‧electrode frame

58‧‧‧Electrode frame support

60‧‧‧Insulated tube room

62‧‧‧

64‧‧‧lower opening

66‧‧‧Upper unit

68‧‧‧ frame

68a‧‧‧ inserted through hole

69‧‧‧Upper roller

70‧‧‧Rotary axis

72‧‧‧ drive wheel

74‧‧‧Upper cover

75‧‧‧Upper cover

76‧‧‧ rails

78‧‧‧ Crane

78a‧‧‧ Balance

80‧‧‧Wire

82‧‧‧Extensions

84‧‧‧lower unit

86‧‧‧ frame

87‧‧‧ lower roller

88‧‧‧Rotary axis

90‧‧‧ lower wheel

92‧‧‧Rotary brush

94‧‧‧Guideboard

96‧‧‧Inlet distribution board

98‧‧‧Export distribution board

100‧‧‧Upper opening

102‧‧‧Diffusion space

Fig. 1 is a perspective view showing an electric dust collecting device (one stage of a fixed electrode type electric dust collecting device and a stage of a moving electrode type electric dust collecting device) of the embodiment.

Fig. 2 is a front elevational view showing an electric dust collecting device (four stages of a fixed electrode type electric dust collecting device and two stages of a moving electrode type electric dust collecting device) of the embodiment.

Fig. 3 is a partial enlarged view of a second stage of the mobile electrode type electric dust collector of Fig. 2.

Fig. 4 is a side view of the electric dust collector of the embodiment, Fig. 4 (a) is a side view of the fixed electrode type electric dust collector, and Fig. 4 (b) is a side view of the moving electrode type electric dust collector.

Fig. 5 is a partial schematic view showing the electric dust collector of the embodiment, Fig. 5(a) is a plan view showing an upper cover member of the movable electrode type electric dust collector, and Fig. 5(b) is a mobile electrode type electric dust collecting device. A plan view of the upper unit of the apparatus, and Fig. 5(c) is a plan view of a lower unit constituting the movable electrode type electric dust collector.

Fig. 6 is a schematic view showing a modification of the electric dust collecting device (two stages of the fixed electrode type electric dust collecting device) according to the first embodiment, Fig. 6(a) shows the front stage of the modification, and Fig. 6(b) shows the rear stage fixed electrode. Removal of dust collecting electrode, discharge electrode, ceiling and hopper of electric dust collector, Figure 6(c) The installation of the insulating tube chamber is shown, and Figure 6(d) shows the installation of the upper unit.

Fig. 7 is a schematic view showing a first modification of the electric dust collector of the first embodiment (a work of attaching an electrode frame after the upper cover is attached), and Fig. 7(a) is a front view, Fig. 7(b) Side view.

Fig. 8 is a schematic view showing a modification of the electric dust collector of the first embodiment (a discharge of the discharge electrode), Fig. 8(a) is a front view, and Fig. 8(b) is a side view.

Fig. 9 is a schematic view showing a modification of the electric dust collector of the first embodiment (before moving the dust collecting electrode), Fig. 9(a) is a front view, and Fig. 9(b) is a side view.

Fig. 10 is a schematic view showing a modification of the electric dust collector of the first embodiment (after moving the dust collecting electrode is suspended), Fig. 10(a) is a front view, and Fig. 10(b) is a side view.

Fig. 11 is a schematic view showing a modification of the electric dust collector of the first embodiment (lower unit hanging project), Fig. 11 (a) is a front view, and Fig. 11 (b) is a side view.

Fig. 12 is a schematic view showing a modification of the electric dust collector of the first embodiment (a hopper crane project), Fig. 12 (a) is a front view, and Fig. 12 (b) is a side view.

Fig. 13 is a schematic view showing a modification of the electric dust collector according to the first embodiment (after the hopper is installed), Fig. 13 (a) is a front view, and Fig. 13 (b) is a side view.

Figure 14 is a view showing an electric dust collecting device of the second embodiment (fixed electric power) The schematic diagram of the renovation project of the pole type electric dust collector 2), Figure 14 (a) shows the modification before, and Figure 14 (b) shows the project of moving the lower stage fixed electrode type electric dust collector into the lower unit. Fig. 14(c) shows the process of loading the insulating tube chamber and then loading it into the electrode frame, and Fig. 14(d) shows the project of loading the electrode.

Fig. 15 is a schematic view showing a modification of the electric dust collector according to the second embodiment, wherein Fig. 15(a) shows the installation work of the upper unit, and Fig. 15(b) shows the loading operation of the moving dust collecting electrode (at the time of hoisting) Fig. 15(c) shows the loading of the moving dust collecting electrode (after hoisting), and Fig. 15(d) shows the upper cover mounting process.

Figure 16 is a side view of Figure 15 (b).

Fig. 17 is a schematic view showing a modification of the electric dust collector of the embodiment.

10‧‧‧Electrical dust collector

12‧‧‧ Shell

16‧‧‧Inlet flue

18‧‧‧Export flue

20‧‧‧ hopper

22‧‧‧Export

24‧‧‧ gas distribution board

28‧‧‧Fixed electrode type electric dust collector

30‧‧‧Discharge electrode

32‧‧‧electrode frame

34‧‧‧Electrode frame support

36‧‧‧

38‧‧‧Insulated tube room

42‧‧‧Fixed dust collecting electrode

44‧‧‧Mobile electrode type electric dust collector

46‧‧‧Mobile dust collecting electrode

48‧‧‧Dust electrode plate

56‧‧‧electrode frame

60‧‧‧Insulated tube room

66‧‧‧Upper unit

74‧‧‧Upper cover

76‧‧‧ rails

78‧‧‧ Crane

82‧‧‧Extensions

84‧‧‧lower unit

94‧‧‧Guideboard

96‧‧‧Inlet distribution board

98‧‧‧Export distribution board

Claims (17)

The invention relates to a method for modifying an electric dust collecting device, which is an electric dust collecting device in which a fixed electrode type electric dust collecting device is disposed in a casing, which is characterized in that: the fixed electrode type electric dust collecting device is replaced with a moving dust collecting electrode and a discharge electrode corresponding to the aforementioned moving dust collecting electrode. The method of modifying an electric dust collector according to claim 1, wherein the fixed electrode type electric dust collector has a plurality of sections disposed in a direction of a flow path of the exhaust gas flowing through the outer casing in the outer casing, After the fixed electrode type electric dust collector of a part or all of the stationary electric dust collector is removed, the moving dust collecting electrode and the discharge electrode are mounted at a position where the fixed electrode type electric dust collecting device is removed. The method of modifying an electric dust collector according to the first or second aspect of the invention, wherein the hopper which is located at a position opposite to the fixed electrode type electric dust collector at a lower end of the outer casing is removed to form a lower portion In the opening, a crane is placed at a position facing the lower opening of the casing, and the moving dust collecting electrode and the discharge electrode are carried by the crane and carried by the lower opening. The method of modifying an electric dust collector according to claim 3, wherein the upper unit is disposed at a position between the crane and the lower opening, the upper unit having: communicating with the lower opening The frame of the insertion hole and the direction and the circulation in the outer casing a plurality of upper rollers supported by the insertion holes and supporting the upper end of the moving dust collecting electrode in a state in which the flow path of the exhaust gas is arranged in a vertical direction, and are arranged to face the upper drum and The lower unit of the plurality of lower rollers that support the lower end of the moving dust collecting electrode is carried by the lower opening portion by the wire that is continuously fed from the crane and inserted through the insertion hole. The method of modifying an electric dust collector according to the third or fourth aspect of the invention, wherein the hopper is suspended by the crane to seal the lower opening. The method of modifying an electric dust collector according to the fourth or fifth aspect of the invention, wherein the flow of the exhaust gas toward and through the outer casing is installed at a position opposite to the insertion hole on the upper unit The rail has a rail in a longitudinal direction in a vertical direction, and the crane is repeatedly attached to the rail in a manner movable along the rail to hang the moving dust collecting electrode, and the crane is moved. A new moving dust collecting electrode is suspended, whereby the moving dust collecting electrode is arranged in a plurality of directions perpendicular to the flow path of the exhaust gas. The method of modifying an electric dust collector according to the first or second aspect of the invention, wherein an upper opening portion is formed at a position opposite to the fixed electrode type electric dust collector at an upper end of the outer casing, and has an orientation Supporting the aforementioned moving dust collection in a state in which the flow path of the exhaust gas flowing through the casing is arranged in a direction perpendicular to the flow direction The lower unit of the plurality of lower rollers at the lower end of the electrode is placed in the outer casing by the upper opening, and is supported in a state of being aligned with the lower drum to support the moving dust collecting electrode. The upper unit of the upper upper roller of the plurality of upper ends is disposed at a position opposed to the upper opening portion of the outer casing. The method of modifying an electric dust collector according to claim 7, wherein the upper unit has an insertion hole communicating with the upper opening, and the upper roller is supported in the insertion hole. The insertion hole is carried into the moving dust collecting electrode. The method of retrofitting an electric dust collector according to any one of claims 1 to 8, wherein an outer casing is disposed at a position opposed to the upper opening portion of the outer casing, and an upper end of the outer casing is disposed extend. The method for retrofitting an electric dust collector according to any one of the preceding claims, wherein the guide plate is disposed so that a flow path reaching the exhaust gas is lower than a lower end of the discharge electrode The aforementioned exhaust gas of the lower field is guided to a position higher than the lower end of the aforementioned discharge electrode. An electric dust collecting device characterized by comprising: an outer casing for circulating an exhaust gas; and a fixed electrode type electric dust collecting device disposed on an upstream side of a flow path of the exhaust gas in the outer casing; a dust electrode, which is disposed in the flow path of the aforementioned exhaust gas a downstream side of the plurality of dust collecting electrodes connected to each other to form a loop for revolving; a discharge electrode disposed at a position facing the moving dust collecting electrode; and a guiding plate The flow path of the exhaust gas is disposed in a lower region than the lower end of the discharge electrode, and the exhaust gas reaching the aforementioned field is guided to a position higher than a lower end of the discharge electrode. The electric dust collector according to claim 11, wherein the moving dust collecting electrode is disposed in a direction perpendicular to the flow path and supports a lower portion of the lower end of each of the moving dust collecting electrodes by a lower portion The unit is supported to mount the aforementioned guide plate in the aforementioned lower unit. The electric dust collector according to the eleventh or twelfth aspect, wherein the exhaust gas diffusion means is disposed between the fixed electrode type electric dust collector and the moving dust collecting electrode. The electric dust collector according to any one of the eleventh aspect, wherein the fixed electrode type electric dust collector is disposed in a direction of a flow path of the exhaust gas flowing through the outer casing in the outer casing. In the segment, the moving dust collecting electrode is attached to a position where the fixed electrode type electric dust collecting device of a part or all of the fixed electrode type electric dust collecting device is removed. The electric dust collecting device according to any one of the items 11 to 13, wherein the fixed electrode type electric dust collecting device is in front of The inside of the casing is disposed in a plurality of stages in a flow path direction of the exhaust gas flowing through the casing, and the width of the moving dust collecting electrode is wider than that of the fixed electrode type electric dust collecting device, and the moving dust collecting electrode is The fixed electrode type electric dust collector in which at least two or more sections of the fixed electrode type electric dust collector are removed is attached. The electric dust collecting device of claim 15, wherein a diffusion space for diffusing the exhaust gas is formed between the moving dust collecting electrode and the fixed electrode type electric dust collecting device, and the exhaust gas diffusing means is configured In the aforementioned diffusion space. The electric dust collector according to any one of the preceding claims, wherein the upper opening is formed at a position facing the moving dust collecting electrode at an upper end of the outer casing, and the outer casing is An extended outer casing is disposed at a position facing the upper opening portion, and an upper end of the outer casing is extended.