JP6790382B2 - How to adjust the electrostatic precipitator - Google Patents

Description

The present invention relates to a method of adjusting the electrostatic ChiriSo location.

In business establishments that use coal-fueled heat supply systems, such as thermal power plants or steelworks, exhaust gas treatment systems equipped with electrostatic precipitators are used to remove dust contained in exhaust gas.
In the electrostatic precipitator, an electrode is arranged in a container through which exhaust gas is passed, and dust electrostatically adsorbed by the electrode is discharged to a lower hopper.
In a large-scale business establishment, a plurality of dust collecting units having the above-mentioned containers, electrodes and hoppers are installed in parallel, and exhaust gas is distributed to each dust collecting unit by a duct to treat a large amount of exhaust gas. (See Patent Document 1).

In an electrostatic precipitator, as the operation continues, dust may adhere to and accumulate on the electrodes and the flow path, and the dust collecting performance may deteriorate.
As a countermeasure, the inside of the dust collection unit is divided into multiple paths, some of the paths are closed with dampers to clean the accumulated dust in the paths, and the dampers are fully opened in the other paths to collect dust. It continues to work. In a situation where cleaning is not performed, all dampers are fully opened to collect dust in each path (see Patent Document 2).

In the electrostatic precipitator, the exhaust gas duct connected to the dust collector unit is inevitably bent or the like depending on the installation situation. Then, turbulence may occur at the bent corners, resulting in a decrease in processing efficiency and a bias in exhaust gas.
As a countermeasure, a plurality of straightening vanes are arranged at the corners of the duct to guide the passing exhaust gas to adjust the flow of the exhaust gas to each unit (see Patent Document 3).

Japanese Patent Application Laid-Open No. 2013-52033 Japanese Unexamined Patent Publication No. 2010-22907 Japanese Unexamined Patent Publication No. 2001-232235

The arrangement, number, and orientation of the straightening vanes of Patent Document 3 described above are adjusted so that the amount of gas supplied to each unit is uniform regardless of the shape of the duct, the arrangement of the units, and the like. However, since the conventional straightening vane is fixedly provided in the duct, it cannot cope with the fluctuation of the air flow due to the operation.

That is, when the dust accumulation in any of the dust collecting units becomes large, the flow resistance increases and the amount of exhaust gas processed in that unit decreases. Further, a decrease in the processing amount in some units leads to a decrease in the processing amount of the electrostatic precipitator as a whole, which may cause restrictions on the operation of the boiler at the business establishment. That is, there is a problem that the state in which the processing amounts of the plurality of dust collecting units are uniform is lost, and as a result, the overall efficiency is lowered.
Accumulated dust can be removed by cleaning as described in Patent Document 2. However, the cleaning work is carried out regularly, and it is inevitable that the amount of processing in a part of the dust collecting unit will decrease until the next cleaning.

An object of the present invention is to collect electricity so that the exhaust gas to each dust collecting unit can be made uniform without reducing the processing amount of each dust collecting unit even if the flow resistance increases in a part of the plurality of dust collecting units. and to provide a method of adjusting ChiriSo location.

Electrical precipitator includes a plurality of dust collecting unit, the collecting and a respective duct for supplying exhaust gas to the dust-separating unit, wherein the duct includes a set portion connected to a source of said exhaust gases, It has an individual portion leading to each of the dust collecting units and a branch portion branched from the collecting portion and connected to the individual portion, and the exhaust gas passing through the branch portion is directed to collect the exhaust gas. It is characterized by having a rectifying device for adjusting the flow rate of the exhaust gas with respect to the dust unit.

In such an electrostatic precipitator , the flow rate of the exhaust gas to the dust collecting unit can be adjusted by changing the direction of the exhaust gas passing by the rectifying device. That is, the exhaust gas flow rate of the dust collecting unit can be reduced by reducing the exhaust gas toward the inlet of the specific dust collecting unit. On the contrary, by increasing the exhaust gas toward the inlet of the specific dust collecting unit, the exhaust gas flow rate of the dust collecting unit can be increased.
With such a rectifying device, it is possible to adjust the increase / decrease of the exhaust gas for each dust collecting unit, and even if the flow resistance increases in a part of the plurality of dust collecting units, the flow rate between the plurality of dust collecting units increases. Uniformity can be achieved.
At this time, the rectifying device changes the direction of the flow of the exhaust gas, and it is possible to avoid an increase in the flow resistance as in the case of reducing the flow rate with a duct, for example. Therefore, it is possible to make the flow rate uniform among the plurality of dust collecting units without reducing the processing amount of each dust collecting unit.

Electricity in a gas precipitator, the rectifier device is preferably a said arranged in the exhaust gas and the cross direction and a plurality of movable vanes capable of changing a direction of passing.
In such an electrostatic precipitator , by using a plurality of movable vanes as the rectifying device, the device configuration can be simplified and the flow resistance can be suppressed.

In electrical precipitator, wherein the rectifier device, external to the duct preferably has an operating handle for adjusting the orientation of the exhaust gas.
In such an electrostatic precipitator , the operator can adjust the orientation of the rectifier using the operation handle. The adjustment of the direction of the exhaust gas according to the present invention does not have to be performed all the time, and it is sufficient to perform it regularly. That is, there is no need for automation by the control device, and adjustment by the operator is sufficient. Therefore, by allowing the operator to adjust the rectifying device, it is possible to simplify the device configuration while ensuring the necessary and sufficient functions.

In electrical precipitator, wherein the rectifier device, the inlet and outlet of the dust collection unit, it is preferable to have a detector for detecting the dust concentration of the exhaust gas passing through each.
In such an electrostatic precipitator , the dust concentration of the exhaust gas passing through is detected at the inlet and the outlet of the dust collector, and the current dust collection performance of each dust collector is evaluated from the difference in the concentration. be able to.

In electrical precipitator, wherein the detector preferably is installed in the dust collection unit is detectable holes can be introduced dust concentration sensor from the outside.
In the present invention as described above, the following effects can be obtained by making the dust concentration removable, such as when the dust concentration detection interval is as long as several months.
Normally, the detection hole is covered with a lid, and the dust concentration sensor can be introduced only at the time of detection to detect the dust concentration. By putting a lid on the detection hole in normal times, it is possible to prevent leakage of exhaust gas in normal times.
Since the dust concentration sensor is introduced only at the time of detection, the same dust concentration sensor can be reused for a plurality of detection units. When a large number of dust concentration sensors are fixedly provided as a detection unit, a large number of dust concentration sensors are required, but the equipment cost can be reduced by reusing them.
Since the dust concentration sensor is normally removed, damage to the sensor due to dust can be prevented.

The method for adjusting the electrostatic precipitator of the present invention is to change the directions of a plurality of dust collecting units, a duct for supplying exhaust gas to each of the dust collecting units, and the exhaust gas passing through a branch portion of the duct. A method for adjusting an electrostatic precipitator having a rectifying device for adjusting the flow rate of the exhaust gas for each of the dust collectors, and detecting the dust concentration of the exhaust gas passing through the inlet and outlet of the dust collector. By doing so, the dust collecting unit whose dust collecting performance has deteriorated is determined, and the rectifying device discharges the dust collecting unit whose dust collecting performance has deteriorated so that the exhaust gas to the dust collecting unit is reduced. the operation of changing the angle to change the direction of gas the dust concentration, characterized in Succoth repeatedly until shows no deterioration of the dust collection performance.

According to such an adjustment method of the present invention, by detecting the dust concentration of the exhaust gas that has passed through the dust collecting unit, it is possible to identify the dust collecting unit whose dust collecting performance has deteriorated, and to this dust collecting unit. The supply of exhaust gas can be reduced.
When the adjustment of the exhaust gas supply amount to the dust collection unit, it is possible to obtain the effects, as set forth above the electric precipitator.

In the method for adjusting the electrostatic precipitator of the present invention, when an electrode abnormality is detected in any of the dust collecting units, it is preferable to reduce the flow of the exhaust gas toward the dust collecting unit in which the abnormality is detected. ..
In such an adjusting method of the present invention, the flow rate of the exhaust gas of the dust collecting unit can be reduced based on the electrode abnormality of the dust collecting unit. If there is an electrode abnormality in the dust collection unit, the amount of dust that passes through without collecting dust due to poor adsorption at the electrode also increases, but if you take action when the electrode abnormality is detected, the dust of the exhaust gas that has passed through will increase. It is possible to take action earlier than detecting the concentration.

According to the present invention, even if the flow resistance increases in a part of a plurality of dust collecting units, the electric collection capable of equalizing the exhaust gas to each dust collecting unit without reducing the processing amount of each dust collecting unit. it is possible to provide a method of adjusting ChiriSo location.

The block diagram which shows the exhaust gas treatment system which installed one Embodiment of the electrostatic precipitator of this invention. The plan view which shows the electrostatic precipitator of the said embodiment. The side view which shows the rectifying apparatus of said embodiment. The plan view which shows the dust collecting unit of the said embodiment. The side view which shows the dust collecting unit of the said embodiment. A side view (A) and a plan view (B) showing the detection hole of the embodiment, and a side view (C) showing a state in which the dust concentration sensor is installed. The flowchart which shows the adjustment method of the electrostatic precipitator of the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Overall configuration of exhaust gas treatment system 1]
In FIG. 1, the exhaust gas treatment system 1 is a system installed in a thermal power plant, a steel mill, or the like to treat the exhaust gas of a boiler that supplies high-temperature and high-pressure steam using coal as fuel.
The exhaust gas treatment system 1 has a boiler 2 that generates high-temperature and high-pressure steam.
A push-in ventilator 3 and an air preheater 4 are connected to the intake side of the boiler 2. The push-in ventilator 3 sucks in outside air and sends it to the air preheater 4. The air preheater 4 preheats the sent outside air and sends it to the boiler 2.

A denitration device 5, the above-mentioned air preheater 4, an electrostatic precipitator 10, an induction ventilator 6, a desulfurization device 7, and a chimney 8 are connected to the exhaust side of the boiler 2. The exhaust gas from the boiler 2 is denitrified by the denitration device 5 and sent to the air preheater 4. The air preheater 4 recovers the heat of the exhaust gas from the boiler 2, and uses this heat to perform the preheating described above. The exhaust gas from the air preheater 4 is collected by the electric dust collector 10 and further driven by the induction ventilator 6. The exhaust gas from the induced ventilator 6 is desulfurized by the desulfurization apparatus 7 and discharged from the chimney 8 to the outside air.

[Configuration of electrostatic precipitator 10]
In FIG. 2, the electrostatic precipitator 10 has a plurality of dust collecting units 20 and a duct 30 for supplying exhaust gas to each of the dust collecting units 20.
The dust collecting unit 20 will be described in detail later with reference to FIGS. 4 and 5.

[Structure of duct 30]
The duct 30 is connected to the collecting portion 31 connected to the exhaust gas supply source (boiler 2 in FIG. 1), the individual portion 32 leading to each of the dust collecting units 20, and the individual portion 32 branched from the collecting portion 31. It has a branch portion 33 to be formed.
The branch portion 33 is not necessarily partitioned by a clear boundary with respect to the gathering portion 31 and the individual portion 32, but is a portion that expands from the gathering portion 31 and is connected to a plurality of individual portions 32.

The collecting portion 31 and the individual portion 32 each have a corner portion in the middle. A straightening vane 34 for adjusting the flow direction of the exhaust gas to be circulated is fixed to each of these corners.
The straightening vane 34 is composed of a large number of fixed vanes arranged in a direction intersecting the flow of exhaust gas, and each fixed vane has a cross-sectional shape curved in accordance with the bending direction of the corner portion. These fixed vanes guide the flow of exhaust gas passing through the corners to flow along the corners.

[Structure of rectifier 40]
A rectifying device 40 is installed in the branch portion 33 of the duct 30 to change the direction of the exhaust gas passing through and adjust the flow rate of the exhaust gas to the dust collecting unit 20.
The rectifying device 40 has a plurality of movable vanes 41 arranged at the branch portion 33 in a direction intersecting the flow of the exhaust gas (direction crossing the branch portion 33).
Further, the rectifying device 40 has a plurality of detection holes 42 at the inlet and outlet of the dust collecting unit 20 as detection units for detecting the dust concentration of the exhaust gas passing through the portion.

In FIG. 3, the movable vane 41 rotates the shaft 411 extending vertically inside the duct 30, the vane body 412 extending downstream from the shaft 411 (individual portion 32 and the dust collecting unit 20 side), and the shaft 411. It has an operation handle 413 that adjusts the orientation of the vane body 412.
The operation handle 413 is installed outside the duct 30 and can be operated by an operator to rotate the shaft 411, change the direction of the vane body 412, and adjust the direction of the exhaust gas flowing in the duct 30. it can.

[Structure of dust collecting unit 20]
Returning to FIG. 2, a plurality of dust collecting units 20 are installed in parallel, and each of them is connected to the outlet of the individual portion 32 of the duct 30 to supply exhaust gas.
4 and 5 show the details of the dust collecting unit 20.
Each of the dust collecting units 20 has a container through which exhaust gas can flow, and the inside of the container is partitioned into a plurality of cells 21. An electrode 22 for electrostatic adsorption is installed inside each cell 21. A hopper 23 for collecting dust is installed on the lower surface side of each cell 21.
Therefore, by introducing the exhaust gas from the inlet side of the dust collecting unit 20 (left side of FIGS. 4 and 5) and energizing the electrode 22, the dust in the exhaust gas is electrostatically adsorbed on the electrode 22, and the lower hopper Collected at. As a result, dust is collected for the passing exhaust gas.

A plurality of dampers 24 and operation handles 25 corresponding to each cell 21 are installed on the inlet side of the dust collecting unit 20.
When the operator operates the operation handle 25, the damper 24 can be operated to block the exhaust gas flowing from the duct 30 into the cell 21. In each cell 21, the inside of the cell 21, the electrode 22 and the hopper 23 can be cleaned and maintained while the exhaust gas is blocked by the damper 24.

As described above, the rectifier 40 has a plurality of detection holes 42 at the inlet and the outlet of the dust collecting unit 20.
In FIGS. 6A and 6B, the detection hole 42 has a tubular portion 421 fixed to the upper surface side of the container of the dust collecting unit 20. The lower end of the tubular portion 421 communicates with the inlet side or the outlet side of each cell 21 of the dust collecting unit 20 through the opening 422 of the container. On the other hand, the upper end opening 423 of the tubular portion 421 is covered with a removable disk-shaped lid portion 424.
As shown in FIG. 6C, the detection hole 42 has the lid portion 424 removed, a dust concentration sensor 43 is introduced, and the tip thereof reaches the inside of the dust collection unit 20 to reach the inlet side of each cell 21. Alternatively, the dust concentration of the exhaust gas passing through the outlet side can be detected.

[Operation of electrostatic precipitator 10]
In the electrostatic precipitator 10 of the present embodiment as described above, the exhaust gas of the boiler 2 is collected as a part of the exhaust gas treatment system 1 during normal operation.
On the other hand, when it is time to periodically adjust the electrostatic precipitator 10, the rectifying device 40 is adjusted by the adjustment method based on the present invention.

During normal operation, the exhaust gas from the boiler 2 is denitrated by the denitration device 5, the exhaust heat is recovered by the air preheater 4, and then the dust is removed by the electrostatic precipitator 10. The dust-removed exhaust gas is discharged from the induction ventilator 6 through the desulfurization device 7 and from the chimney 8.
In the electrostatic precipitator 10, the exhaust gas supplied to the collecting portion 31 of the duct 30 is introduced into the dust collecting unit 20 from the branch portion 33 via the individual portion 32. At this time, the exhaust gas distributed to each individual portion 32 or the dust collecting unit 20 is adjusted by the rectifying device 40 installed in the branch portion 33.

That is, in the rectifying device 40, if there is a large amount of exhaust gas directed to the specific individual portion 32 depending on the direction of the movable vane 41, the dust collecting unit 20 following the individual portion 32 processes a large amount of exhaust gas. On the contrary, if the amount of exhaust gas distributed is small, the amount of exhaust gas processed by the dust collecting unit 20 following the individual unit 32 decreases.
The orientation of the movable vane 41 in the rectifying device 40 is adjusted periodically by the procedure shown in FIG. 7.

[Adjustment method of rectifier 40]
In FIG. 7, when adjusting the rectifying device 40, the operator first inspects the dust concentration in the exhaust of the chimney 8 (see FIG. 1) (process S1).
If the exhaust dust concentration of the chimney 8 is not equal to or higher than a predetermined value, the electrostatic precipitator 10 is in an appropriate operating state and the rectifying device 40 does not need to be adjusted. Therefore, the process ends.

If the exhaust dust concentration of the chimney 8 is equal to or higher than a predetermined value, the rectifying device 40 is adjusted for each of the plurality of dust collecting units 20.
First, the target dust collecting unit 20 is selected (process S2).
Next, the selected dust collecting unit 20 is inspected for abnormalities in the electrodes 22 by inspecting the electrical system (process S3).

If there is an abnormality in the electrode 22 in the process S3, the movable vane 41 of the rectifying device 40 is adjusted so that the distribution of the exhaust gas to the selected dust collecting unit 20 is minimized. That is, the movable vane 41 is adjusted, and the exhaust gas that was supposed to go to the corresponding dust collecting unit 20 is distributed toward the adjacent dust collecting unit 20 (process S8).
After the process S8, it is determined whether or not the adjustment for all the dust collecting units 20 is completed (process S9).

When it is determined in the process S9 that the adjustment for all the dust collecting units 20 is completed, the adjustment of the rectifying device 40 is completed.
If it is determined in the process S9 that there is an unsupported dust collecting unit 20, the process returns to the process S2, the next dust collecting unit 20 is selected, and the adjustments after the process S3 are performed.

If there is no abnormality in the electrode 22 in the process S3, the dust concentrations on the inlet side and the outlet side of the dust collection unit 20 are measured, respectively (process S4). For these measurements, the detection hole 42 and the dust concentration sensor 43 shown in FIG. 6C are used.
Next, the dust concentration difference between the inlet side and the outlet side of the dust collecting unit 20 is calculated (process S5) and compared with a predetermined value as a reference (process S6).

If the concentration difference in process S6 is equal to or less than a predetermined value (if the dust collection function is not sufficient), the rectifier 40 is adjusted so that the exhaust gas to the selected dust collection unit 20 is reduced (process S7). Specifically, the directions of the movable vane 41 and the adjacent movable vane 41 at the inlet of the individual portion 32 of the duct 30 leading to the selected dust collecting unit 20 are changed, and the exhaust gas flowing into the individual portion 32 is discharged. Reduce. After that, the process returns to process S4.
The change in the process S7 is performed by a slight angle. Then, the change of the angle is repeated while making a determination again in the processes S4 to S6. As a result, the selected dust collecting unit 20 can be adjusted so that the exhaust gas flow rate corresponds to the current dust collecting capacity.

If the concentration difference is larger than the predetermined value in the process S6 (if the dust collecting function is sufficient), the adjustment for the selected dust collecting unit 20 is completed. Then, it is determined in the above-mentioned process S9 whether or not all the units are finished, and the process returns to the next selection of the dust collecting unit 20 (process S2), or the adjustment of the rectifying device 40 is finished.

[Effect of Embodiment]
In the present embodiment, the direction of the exhaust gas passing through the rectifying device 40 can be changed to adjust the flow rate of the exhaust gas to the dust collecting unit 20. That is, by reducing the exhaust gas toward the inlet of the specific dust collecting unit 20, the exhaust gas flow rate of the dust collecting unit 20 can be reduced. On the contrary, the exhaust gas flow rate of the dust collecting unit 20 can be increased by increasing the exhaust gas toward the inlet of the specific dust collecting unit 20.

With such a rectifying device 40, it is possible to adjust the increase / decrease of the exhaust gas for each dust collecting unit 20, and even if the flow resistance increases in a part of the plurality of dust collecting units 20, even if the flow resistance increases, between the plurality of dust collecting units 20 It is possible to make the flow rate uniform in.
At this time, the rectifying device 40 changes the direction of the flow of the exhaust gas, and it is possible to avoid an increase in the flow resistance as in the case where the flow rate is reduced by the damper 24 of the dust collecting unit 20, for example. Therefore, it is possible to make the flow rate uniform among the plurality of dust collecting units 20 without reducing the processing amount of each dust collecting unit 20.

In the present embodiment, by using a plurality of movable vanes 41 as the rectifying device 40, the device configuration can be simplified and the flow resistance can be suppressed.
Further, in the present embodiment, the operator can adjust the orientation of the movable vane 41 by using the operation handle 413.
The adjustment of the direction of the exhaust gas in the rectifying device 40 does not have to be performed all the time, and it is sufficient to perform it regularly. That is, there is no need for automation by the control device, and adjustment by the operator is sufficient. Therefore, by allowing the operator to adjust the rectifying device 40, it is possible to simplify the device configuration while ensuring the necessary and sufficient functions.

In the present embodiment, by providing detection holes 42 at the inlet and outlet of the dust collecting unit 20 and introducing the dust concentration sensor 43 into the detection holes 42, the dust concentration of the exhaust gas passing through the portion can be detected. Then, the current dust collection performance of each dust collection unit can be evaluated from the concentration difference.
In the present embodiment, by covering the detection hole 42 with the lid portion 424 in the normal state, it is possible to prevent the leakage of the exhaust gas in the normal time. On the other hand, at the time of detection, the dust concentration sensor 43 can be introduced to detect the dust concentration.
Since the dust concentration sensor 43 is introduced only at the time of detection, the same dust concentration sensor 43 can be reused in a plurality of detection holes 42. That is, when a large number of dust concentration sensors 43 are fixedly provided, a large number of dust concentration sensors 43 are required, but the equipment cost can be reduced by reusing them.
Further, since the dust concentration sensor 43 is normally removed, damage to the sensor due to dust can be prevented.

In the present embodiment, by detecting the dust concentration of the exhaust gas that has passed through the dust collecting unit by the adjustment method shown in FIG. 7, it is possible to identify the dust collecting unit whose dust collecting performance has deteriorated, and this dust collecting unit. The amount of exhaust gas supplied to is reduced.
Further, in the adjustment method of the present embodiment, when an electrode abnormality is detected in any of the dust collecting units 20 by the processing S3, the flow of exhaust gas toward the dust collecting unit 20 where the abnormality is detected by the processing S8. Can be reduced. If there is an electrode abnormality in the dust collection unit 20, the amount of dust that passes through without collecting dust due to poor adsorption at the electrode 22 also increases, but if the response is taken when the electrode abnormality is detected, the passed exhaust gas It is possible to take action earlier than detecting the dust concentration of.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and changes within the scope of achieving the object of the present invention are included in the present invention.
In the above embodiment, four dust collecting units 20 are installed in the electrostatic precipitator 10, but the number of dust collecting units 20 may be two, three, or five or more, and may be a plurality.

In the dust collecting unit 20, cells 21 accommodating the electrodes 22 were installed in parallel in four systems, but may be five or more systems, three or less systems, and not limited to one system. It may be just. The damper 24 corresponding to each cell 21 is not limited to opening and closing by the operation handle 25, but may be opened and closed by a motor or the like. Alternatively, the damper 24 may be omitted if the cell 21 does not need to be closed.

In the duct 30, the arrangement and shape of the straightening vane 34 may be appropriately changed, and may be omitted when there is no bending.
In the rectifying device 40, the means for changing the direction of the exhaust gas flow is not limited to the movable vane 41, but the direction of the tubular duct is variable, and the direction of the frame in which a large number of vanes are arranged is variable. It may have other shape structures such as those.
Further, the movable vane 41 is not limited to the rotation by the operation handle 413, but may be rotated by a motor or the like. However, considering the frequency of adjustment work, the operation handle 413 operated by the worker is sufficient, and the structure can be simplified.

The type of the dust concentration sensor 43 for detecting the dust concentration as a reference for adjusting the rectifying device 40 is not limited, and various existing sensors can be appropriately used.
The dust concentration sensor 43 is not limited to the one introduced in the detection hole 42 when necessary, and may be fixedly installed.
The dust concentration sensor 43 is not limited to detecting the dust concentration at the inlet and outlet of the dust collecting unit 20, but detects only the outlet side, and determines the dust collecting function of the dust collecting unit 20 by comparing with a predetermined reference value. May be good.

The exhaust gas treatment system 1 in which the electrostatic precipitator 10 is installed is not limited to the configuration as in the above embodiment, and may have other configurations. It is also used in thermal power plants or steelworks, and is installed not only in boiler systems that supply high-temperature and high-pressure steam using coal as fuel, but also as part of systems that require dust removal from exhaust gas. be able to.

The present invention can be used for an exhaust gas electrostatic precipitator in an exhaust gas treatment system of a heat supply system using coal as fuel and a method for adjusting the same.

1 ... Exhaust gas treatment system, 2 ... Boiler, 3 ... Push-in ventilator, 4 ... Air preheater, 5 ... Denitration device, 6 ... Attracting ventilator, 7 ... Desulfurization device, 8 ... Chimney, 10 ... Electrodust collector, 20 ... Dust collection unit, 21 ... Cell, 22 ... Electrode, 23 ... Hopper, 24 ... Damper, 25 ... Operation handle, 30 ... Duct, 31 ... Collecting part, 32 ... Individual part, 33 ... Branch part, 34 ... Straightening plate , 40 ... rectifier, 41 ... movable vane, 411 ... shaft, 412 ... vane body, 413 ... operation handle, 42 ... detection hole, 421 ... cylinder, 422 ... opening, 423 ... top opening, 424 ... lid, 43 ... Dust concentration sensor, S1 to S9 ... Processing.

Claims (2)

A plurality of dust collecting units, a duct for supplying exhaust gas to each of the dust collecting units, and a flow rate of the exhaust gas to each of the dust collecting units by changing the direction of the exhaust gas passing through a branch portion of the duct. It is an adjustment method of an electrostatic precipitator having a rectifying device for adjusting the amount of gas.
By detecting the dust concentration of the exhaust gas that has passed through the inlet and outlet of the dust collecting unit, the dust collecting unit whose dust collecting performance has deteriorated can be identified.
With respect to the dust collecting unit whose dust collecting performance has deteriorated, the dust concentration determines the dust collecting performance by changing the angle at which the rectifying device changes the direction of the exhaust gas so that the exhaust gas to the dust collecting unit is reduced. adjustment method for an electrostatic precipitator, characterized in comprising or in Repetitive Rikae score and shows no drop in. In the method for adjusting the electrostatic precipitator according to claim 1 ,
A method for adjusting an electrostatic precipitator, which comprises reducing the flow of the exhaust gas toward the dust collecting unit in which the abnormality is detected when an electrode abnormality is detected in any of the dust collecting units.

Images