JPH0916201A - Automatic resuming device for plant equipment - Google Patents

Abstract

PURPOSE: To lighten the burden on an operator by timely selecting and automatically resuming equipment which has stopped owing to power failure, in predetermined order after a recovery from the power or equipment which were in operation right before the power failure for equipment which has stand-by equipments. CONSTITUTION: The plant equipment stops operating owing to a power failure and the automatic resuming device restarts the plant equipment after a recovery from the power failure. An equipment operation stop detecting means 10 detects the stop of the plant equipment owing to the power failure. A power failure detecting device 9 detects the power failure. The output of a flip-flop circuit 13 is set according to AND conditions between both the outputs of the equipment operation stop detecting means 10 and power failure detecting device 9. A power failure recovery detecting means 16 detects the recovery from the power failure. A timer 15 operates according to AND conditions between the set output of the flip-flop circuit 13 and the output of the power failure recovery detecting means 16, and a controller restarts the plant equipment which has stopped after the set time of the timer 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic restoration device for plant equipment, and more particularly to an automatic restoration device for plant equipment that automatically restarts a refuse incineration plant stopped due to a power failure.

[0002]

2. Description of the Related Art Conventionally, for example, in a refuse incineration plant, in order to improve the incineration efficiency of the plant, as shown in the system diagram of FIG. Boiler feed pumps 1 and 2, steam condensers 4,5 and pumps 6 and 7 are provided. When a power failure occurs during the operation of such a refuse incineration plant, and the power failure is restored, the operator operates the equipment operation panel 8 to operate the boiler feed pump 1 or 2, the boiler 3, the steam condenser 4 or 5, the pump 6 or 7. On the other hand, the restart commands were issued in order with good timing. In this case, with respect to the equipment having the backup device, that is, the boiler feed water pump, the steam condenser and the pump, the operator judges which equipment is operating until just before the power failure and restarts the equipment.

[0003]

As described above, in the prior art, a power failure occurs during operation of the refuse incineration plant, and after the power failure is restored, a restart operation must be performed by the operator's judgment. If the operator makes a mistake in the order of starting the equipment or forgets to start the equipment, there is a problem that the refuse incineration plant does not start up, or even if it starts up, the efficiency is lowered.

The present invention has been made to solve the above problems, and its purpose is to provide plant equipment stopped by a power failure in good timing in a predetermined order after restoration from a power failure, and for equipment having a backup device. To provide an automatic restoration device for plant equipment that automatically selects the equipment that was operating until just before the power failure and automatically restarts it, reducing the burden on the operator and preventing adverse effects on the plant equipment. Especially.

[0005]

In order to achieve the above-mentioned object, the first aspect of the present invention relates to automatic plant equipment in which the plant equipment stops its operation due to a power failure and the plant equipment restarts after this power failure is restored. In the restoration device, equipment operation stop detection means for detecting the stop of the plant equipment due to the power failure, power failure detection means for detecting the power failure, and AND condition of both outputs of the equipment operation stop detection means and the power failure detection means A flip-flop circuit to be set, a power failure recovery detecting means for detecting recovery from the power failure, a timer operated under an AND condition between the setting of the flip-flop circuit and the output of the power failure recovery detecting means, and after a set time of the timer And a controller for restarting the stopped plant equipment.

According to a second aspect of the present invention, in the automatic restoration device for plant equipment according to the first aspect, a signal which is turned on by a power failure, a device stop signal or a device operation signal falling signal is used as a device operation stop detection means to recover from a power failure. An automatic start-up signal is used as the detection means.

[0007]

According to the present invention, since the equipment operating immediately before the power failure is automatically started after the power failure of the refuse incineration plant constituent equipment is restored after the set time of the timer, the operator is required to perform the CR operation.
Only the confirmation of the operation is seen by T or the like, and the burden on the operator can be greatly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment (corresponding to claim 1 and claim 2) of the present invention. As shown in the figure, the automatic restoration device of this embodiment includes a power failure detection device 9, a device operation signal fall detection module 10, a device operation signal rise detection module 11, AND modules 12, 14, a flip-flop module 13, and Two-system operation command system consisting of timer module 15 and signal inversion module 16
And a control device (computer) that processes the modules 10 to 16.

Next, the operation of this embodiment will be described.
Now, when the pump 1, which is one of the components of the refuse incineration plant, stops due to a power failure, a signal detected by the device operation signal fall detection module 10 indicating that the pump 1 has stopped and a signal that is ON due to a power failure Since the condition of the AND module 12 is satisfied, the flip-flop module 13
Flip-flop module 1
3 output is set. Next, when the power failure is restored, the output side of the signal inversion module 16 is set and the condition of the AND module 14 is satisfied, so that the restart command is output to the pump 1 after the set time of the timer module 15. Then, after the pump 1 is started, the device operation signal rise detection module 11 resets the flip-flop module 13 to prepare for another power failure. When the spare pump 2 is operating, it operates similarly to the pump 1.

Further, in the refuse incineration plant, when there are a plurality of devices, if the starting tine migs of the devices are set in advance by the timer module 15, the plant constituent devices are sequentially started after the power failure is restored.

As described above, according to the present embodiment, the plant equipment that has been operated immediately after the power failure is restored to immediately before the power failure is automatically selected and restarted automatically with good timing.
The operator only needs to see the confirmation of the operation on the CRT or the like, and the burden on the operator can be greatly reduced.

(Other Embodiments) FIG. 2 is a circuit diagram of another embodiment (corresponding to claim 1 and claim 2) of the present invention. This embodiment is different from the embodiment of FIG. 1 which has already been described, in that a device stop signal SW18 is provided instead of outputting an ON signal due to a power failure, and an automatic start-up signal SW19 is provided instead of a power failure recovery signal. Since the other points are the same, the same portions will be denoted by the same reference numerals in the following description.

According to the present embodiment, the device stop signal SW18 is provided when a power failure occurs, and the automatic start-up signal SW19 is provided when the power failure is recovered. Therefore, only the device operating before the power failure occurs is automatically restarted. It can be started automatically and does not issue a start command to a device that has stopped due to trouble.

Therefore, according to the present embodiment, the plant equipment that has been operated until just before the power failure is automatically selected after the power failure is restored, and the restart is automatically performed in a timely manner. Therefore, the operator sees only the operation confirmation by the CRT or the like. All that is required is to reduce the burden on the operator.

[0015]

As described above, according to the present invention,
After the power failure is restored, the equipment is automatically restarted in a timely manner, which can reduce the burden on the operator. Further, it is possible to avoid forgetting to restart the equipment due to an operator's mistake, and it is possible to eliminate adverse effects such as reduction in efficiency of the refuse incineration plant.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional automatic recovery device for refuse incineration plant equipment.

[Explanation of symbols]

1, 2 ... Boiler feed pump, 3 ... Boiler, 4, 5 ... Steam condenser, 6, 7 ... Pump, 8 ... Equipment operation panel, 9 ... Blackout detection device, 10 ... Operation signal OFF detection module, 11
... Operating signal ON detection module, 12 ... AND module, 13 ... Flip-flop module, 14 ... AND module, 15 ... Timer module, 16 ... Signal inversion module, 18 ... Stop SW, 19 ... Automatic startup S
W.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G05B 23/02 0360-3H G05B 15/02 Z 302 19/05 J

Claims (2)

[Claims] 1. A plant operation stop detection means for detecting a stop of the plant equipment due to the power failure in a plant equipment automatic restoration apparatus in which the plant equipment stops operation due to a power failure and the plant equipment restarts after the power failure is restored. A power failure detecting means for detecting the power failure, a flip-flop circuit set by an AND condition of both outputs of the equipment operation stop detecting means and the power failure detecting means, and a power failure recovery detecting means for detecting recovery of the power failure, A timer that operates under an AND condition between the set of the flip-flop circuit and the output of the power failure recovery detection means, and a control device that restarts the plant equipment that has stopped after a set time of the timer, Automatic restoration device for plant equipment. 2. The automatic restoration device for plant equipment according to claim 1, wherein a signal which is turned on by a power failure, a device stop signal or a device operation signal falling signal is automatically started as a power failure recovery detection means as a device operation stop detection means. An automatic restoration device for plant equipment, which uses a signal.