JP2000111456A - Diagnosis device of electrode plate dust-removing machine for electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagnosis device of an electrode plate dust-removing machine for electric dust collector for securely judging that the operation of hammering is not normal and a dust-removing capacity has been lowered while an electric dust collector operates at the same time specifying the position of a faulty hammer, stopping the dust collector at an optimum timing, and reducing a repairing period. SOLUTION: In an electrode plate dust-removing machine for electric dust collector, a vibration sensor 9 is provided at a bearing part 1a being located outside an electric dust collector body of a hammering shaft 1 where a hammer is mounted, thus detecting the level of the vibration of the hammering shaft 1 when a shock is given to each electrode plate 4 by the hammering of each hammer 7 for each hammer 7. Also, a control means 11 is provided to judge that the hammer that performed hammering when the vibration value of the hammering shaft 1 does not exceed a given threshold by comparing it with the given threshold.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for diagnosing the quality of individual hammers provided in a hammering type electrode precipitator used in a dry type electric precipitator during operation of the electric precipitator. The present invention relates to a diagnostic apparatus for an electrode precipitator for an electric precipitator which can be continuously performed from outside the precipitator.

[0002]

2. Description of the Related Art For example, a reaction end gas generated in a dry smelting process such as a nonferrous metal smelting process has a high temperature and contains a large amount of smoke. Since such a gas contains harmful substances such as sulfur dioxide, it is necessary to remove them.
Therefore, in dry smelting, first, the temperature of the reaction-ending gas is reduced by a waste heat boiler, and most of the smoke ash is removed.Next, dusty ash having a small particle diameter floating in the exhaust gas is removed using an electric dust collector. ing. The electric dust collector has a configuration in which a large number of electrode plates for a discharge electrode and a dust collection electrode are arranged, and a high-voltage DC power supply is connected to both of the electrodes. And
A corona discharge is generated from the discharge electrode by a high DC current to give a charge to the dusty smoke ash with a small particle diameter contained in the reaction processing gas, and an electric field is applied to the dusty ash to adhere to the dust collection electrode by static electricity. I can do it. Here, if the amount of smoke ash adhering to the electrode plate is too large, not only the dust collection efficiency is reduced, but also the electric dust collector itself may be damaged. For this reason, the electric dust collector is provided with a dust remover for removing dust attached to the electrode plate, thereby preventing the dust collection efficiency of the electrode plate from being reduced. As this type of dust remover, a hammering type is employed. For example, the hammering type dust remover has a hammering shaft 1 and a hammer unit at a position where an impact can be given to each electrode plate 4 (only one is shown in this drawing) as shown in FIG. 2 and a plurality of hammering mechanisms composed of an electrode plate backing plate 3. By driving a drive device (not shown) to rotate the hammering shaft 1 at a constant speed, each of the electrodes is sequentially and regularly. The plate is hammered and the ash deposited on the electrode plate is blown off to the bottom of the electric precipitator.

Conventionally, the inside of the electric precipitator cannot be inspected during the operation of the electric precipitator. Therefore, it is almost impossible to grasp during the operation of the electric precipitator whether or not the dust removal of the electrode plate by hammering is performed normally. I couldn't.
For this reason, to check for abnormalities in the dust collector,
The hammering has been performed by a visual inspection of the hammering, periodically or after stopping when the dust collector efficiency or charging voltage has decreased and the entire dust collector has failed.

[0004]

In order to visually check the hammering, as described above, the operation of the dust collector is stopped, and the inside of the dust collector is required to be in a predetermined state. It must be allowed to cool to temperature. Then, the operator checks the hammering at the place where the hammer is attached one by one. However, when the operation of the dust collector is stopped, the processes before and after the operation must be stopped, so that the production loss in smelting becomes excessive. In addition, in the hammering inspection work, in a poor environment where there is a lot of dust at high temperature, a bad hammer is searched out from a large number of installed hammers. Had become. Furthermore, when the hammering is inspected visually, the criteria for judging the quality of the hammer become ambiguous,
Since the determination tends to vary, it is difficult to reliably determine that the hammer is defective. Therefore, in order to reliably repair a defective hammer, it was necessary to repair all suspected hammers. Therefore, hammers that do not require repair are also included in the scope of repair,
There is a problem that the repair work is wasteful, the repair time is lengthened, and the downtime loss and the compensation cost increase.

According to the present invention, it is possible to reliably determine that the hammering operation is not normal and the dust-removing ability is reduced during the operation of the electric dust collector, and it is possible to identify the position of the defective hammer, and to operate the dust collector. It is an object of the present invention to provide a diagnostic device for an electrode plate dust remover for an electric precipitator, which is capable of stopping at an optimum time and shortening a repair period.

[0006]

In order to solve the above-mentioned problems, a diagnostic apparatus for an electrode precipitator for an electrostatic precipitator according to the present invention is provided. An electrode plate dust remover for an electric precipitator having a hammering mechanism capable of removing a hammering mechanism, a hammering shaft to which each hammer is attached, a vibration sensor provided in a bearing portion located outside the electric precipitator main body, By judging the magnitude of the vibration of the hammering shaft when the impact is given to each electrode plate by the hammering of each hammer via the vibration sensor, the quality of the impact given by each hammer to each electrode plate is determined. It is characterized by being able to do.

Further, the present invention preferably compares the vibration value of the hammering shaft detected by the vibration sensor with a predetermined threshold value, and when the vibration value does not exceed the predetermined threshold value, performs the operation. Control means for judging a hammer that has performed hammering, in which a vibration value not exceeding a threshold value is detected, as defective is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a diagnostic apparatus for an electrode precipitator according to the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram showing one embodiment of a diagnostic device for an electrode plate dust remover for an electric dust collector according to the present invention. FIG. 2 is a schematic configuration diagram showing a hammering mechanism of the electrode dust remover for the electrostatic precipitator. FIG. 3 is a graph showing a measurement record of vibration during hammering of the electrode precipitator for an electrostatic precipitator.

The electrode plate dust remover used in this embodiment has a configuration in which a plurality of hammering mechanisms having a structure as shown in FIG. 2 are connected out of phase. A hammer 2 is attached to the hammering shaft 1. The hammer unit 2 has connecting members 5 and 6 and a hammer 7. The connecting member 5 has one end 5 a fixed to the hammering shaft 1. The other end 5 b of the connecting member 5 and one end 6 a of the connecting member 6 are rotatably mounted via the shaft 4. The hammer 7 is attached to the other end 6 b of the connecting member 6. The connecting members 5 and 6 are positioned off the side surfaces of the electrode plate 4 so as not to collide with the side surfaces of the electrode plate 4 when the hammering shaft 1 is rotated. At a predetermined position where the hammer 7 collides, one end 3
a is provided so as to be in contact with the side surface of the electrode plate 4. The hammering shaft 1 is provided with a driving unit such as an electric motor (not shown), and the driving unit can rotate the hammering shaft 1 in a direction indicated by an arrow in the figure. When the hammering shaft 1 is rotated in the direction indicated by the arrow in the figure, the connecting member 5 rotates to lift the connecting members 6 and the hammer 7. When the hammer 7 reaches a predetermined position by the rotation of the hammering shaft 1, the hammer 7 is driven by its own weight through the connecting member 6 through the shaft 4.
Rotate around the falling direction. Then, the hammer 7 collides with the other end portion 3b of the electrode plate contact plate 3, and gives an impact to the electrode plate 4. As a result, dust adhering to the electrode plate 4 falls. A plurality of hammer mechanisms having such a structure are connected to the hammering shaft 1 in a phase-shifted manner (only one is shown by a dashed line in the drawing) in accordance with the mounting position of the electrode plate 4, and a plurality of hammer mechanisms are connected. By rotating the hammer 1, each hammer 7 hammers each electrode plate 4 in turn.

Here, when the hammer 7 collides with the contact plate 3 for an electrode plate, an impact is also applied to the hammering shaft 1. Therefore, it is possible to detect the magnitude of the shock applied to the electrode plate 4 by measuring the magnitude of the vibration of the hammering shaft 1. For example, if the vibration of the hammering shaft 1 is small, the impact applied to the electrode plate is also small. Incidentally, the end of the hammering shaft 1 generally protrudes outside the electric dust collector. Therefore, for each hammering of each hammer mechanism provided in the electrode plate dust remover, the vibration of the portion of the hammering shaft protruding outside the electric dust collector is measured, and a predetermined threshold value is provided for the vibration value. If it is possible to judge whether hammering is good or not based on whether or not the threshold value is exceeded, it is possible to remove dust by an objective criterion that is not affected by the subjectivity of the operator during operation of the electric precipitator. An abnormality of the device can be detected, and an abnormal part of the electrode plate dust remover can be specified. Therefore, the diagnosis apparatus for the electrode dust remover for an electric dust collector according to the present embodiment has a system configuration as described below.

As shown in FIG. 1, the diagnostic apparatus according to the present embodiment includes a vibration sensor 9, a vibration meter amplifier 10, an alarm 10 on a bearing 1a of a hammering shaft 1 of a hammering type electrode plate dust remover shown in FIG. Device 11, recorder 12, rotation angle detector 13
It has. Vibration sensor (acceleration pickup) 9
Is mounted on a bearing 1a of the hammering shaft 1, which is located outside the electric precipitator, detects vibration generated in the hammering shaft 1, converts the magnitude of the vibration into an electric signal, and outputs the electric signal. The circuit is configured. The hammering shaft 1 extends inside the electric precipitator with a wall 14 interposed therebetween, and is also supported by a bearing 1'a inside the electric precipitator. In FIG. 1, a specific mode of the hammering mechanism is omitted. The vibration meter amplifier 10 is connected to the vibration sensor 9, is configured to receive an electric signal output through the vibration sensor 9, amplify the electric signal to a predetermined size, and output the amplified signal. The waveform and amplitude of the amplified electric signal can be displayed on a screen. The alarm device 11 is connected to the vibrometer amplifier 10, receives an electric signal output via the vibrometer amplifier 10, compares the magnitude with a predetermined reference value, and determines whether the electric signal is a predetermined value. The circuit is configured to sound an alarm when the value falls below the reference value. The recorder 12 is a vibration meter amplifier 1
0, and is configured to receive an electric signal output via the vibrometer amplifier 10 and record the waveform on paper or a magnetic medium. Further, the rotation angle detector 13 is in contact with the hammering shaft 1 via a gear or the like and is connected to the alarm device 11 so that the rotation angle of the hammering shaft 1 can be detected. A plurality of rotation angles are set according to the timing at which each hammer 7 gives an impact to each electrode plate 4. When the rotation of the hammering shaft 1 reaches the predetermined rotation angle, the alarm device 11 It sends a signal. The alarm device 11 is activated when a signal is sent from the rotation angle detector 13.

FIG. 3 shows a measurement record of vibration when the electrode plate dust remover for a dust collector used in the present embodiment hammers. The vertical axis of the graph represents the amplitude, and the horizontal axis represents the passage of time. Further, circles in the graph indicate vibration values of the hammering shafts caused by hammering of the respective hammers until the hammering shaft is rotated once. In addition, 23 electrode plates are provided inside the dust collector electrode plate dust remover used for this measurement, and the electrode plate dust remover is provided with 23 hammering mechanisms for each electrode plate with a phase shift. ing. When the level of the vibration value shown in the present measurement record decreases, it means that sufficient impact has not been given to the electrode plate by hammering. Therefore, in the diagnostic device of the present embodiment, when a vibration value lower than the predetermined reference value is detected, the alarm device 10 emits an alarm sound to notify a failure of the hammer. If the individual vibration waveforms shown in the graph and the attachment positions of the hammers are associated in advance, the attachment positions of the hammers determined to be defective can be easily specified from the graph. The hammer 7 attached to the hammering shaft 1 to which the vibration sensor 9 is attached at a position distant from the bearing 1a is smaller than the hammer 7 attached near the bearing to which the vibration sensor 9 is attached. The vibration value measured via the vibration sensor 9 when the ring is normally performed becomes low. Therefore, it is preferable that the reference value for determining hammering to be defective is separately set in accordance with the distance from the position of the bearing portion 1a on which the vibration sensor 9 is mounted to the mounting position of each hammer 7.

According to the present embodiment, during operation of the electric precipitator, the shock applied to each electrode plate 4 by hammering of each hammer 7 is sequentially detected by the vibration sensor 9 as vibration to the hammering shaft 1. You. The mechanical vibration detected by the vibration sensor 9 is converted into an electric signal, amplified to a predetermined electric signal value via a vibration meter amplifier 10, and then input to the alarm device 11 and the recorder 12.
The alarm device 11 is activated when a signal is sent from a rotation angle detector 13 which is set to send a signal sequentially according to the mounting position of each hammer. Then, the value of the electric signal input through the vibration meter amplifier 10 is compared with a reference value, and an alarm sound is emitted when the value of the electric signal input from the vibration meter amplifier 10 falls below the reference value. In addition, recorder 1
2, vibrations of the bearing 1a caused by hammering of the individual hammers are sequentially recorded. Therefore, according to the present embodiment, it is possible to immediately know the abnormality of the dust removing device from the outside while the electric dust collector is operating by the alarm sound, and at the same time,
From the vibration record of the recorder 12, the attachment position of the defective hammer causing the hammering abnormality can be specified.

[0014]

As described above, according to the present invention, an abnormality in hammering can be reliably and early detected without stopping the operation of the electric dust collector, thereby reducing the dust collection efficiency of the electric dust collector at an early stage. To be able to know,
Adverse effects on subsequent processes can be prevented beforehand. In addition, since the defective hammer can be identified, it is not necessary to inspect the defective hammer before repairing the dust remover, so that the operation stoppage time of the electric dust collector can be significantly reduced, and the operator in a bad environment can be operated. Work load can be greatly reduced. Furthermore, since the repair time can be greatly reduced by eliminating waste of the repair work, machine downtime loss and compensation costs in the process related to the operation of the electric dust collector can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one embodiment of a diagnostic apparatus for an electrode precipitator for an electric precipitator according to the present invention.

FIG. 2 is a schematic diagram of a main part configuration showing an example of a hammering mechanism used in an electrode precipitator for an electrostatic precipitator.

FIG. 3 is a graph showing a measurement record of vibration during hammering by an electrode plate dust remover for an electrostatic precipitator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hammering shaft 1a, 1'a Bearing part 2 Hammer part 3 Patch plate for electrode plate 4 Electrode plate 5, 6 Connecting member 5a, 6a One end 5b, 6b Other end 7 Hammer 8 Shaft 9 Vibration sensor 10 Vibration meter amplifier 11 alarm device 12 recorder 13 rotation angle detector 14 wall of electric dust collector

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hisarige Inoue 346-4 Miyanishi, Harima-cho, Kako-gun, Hyogo F-term in the Harima Works of Sumitomo Metal Mining Co., Ltd. 2G024 AD50 CA13 DA12

Claims (2)

[Claims] 1. An electric dust collector electrode plate dust remover having a hammering mechanism capable of applying a shock to each electrode plate of the electric dust collector to remove dust attached to the electrode plate, wherein each hammer is mounted. The hammering shaft is provided with a vibration sensor in a bearing portion located outside the electrostatic precipitator main body, and the hammering shaft when an impact is given to each electrode plate by the hammering of each hammer through the vibration sensor. A diagnostic device, characterized in that it is possible to judge the quality of impact given to each electrode plate by each hammer by detecting the magnitude of vibration. 2. A vibration value of the hammering shaft detected by the vibration sensor is compared with a predetermined threshold value, and when the vibration value does not exceed the predetermined threshold value, the threshold value is not exceeded. The diagnostic device for an electrode dust remover for an electric dust collector according to claim 1, further comprising control means for judging that the hammer that has performed the hammering whose vibration value has been detected is defective.