JPH0771004A - Abnormal operation monitoring method for asphalt plant - Google Patents

Abstract

(57) [Summary] [Purpose] To monitor the abnormalities that occur during the operation of an asphalt plant with a device and support the operator's operation. [Configuration] A plant operation information monitoring device 15 is provided on an operation panel 11 that controls the operation of the plant. Then, operating information such as temperature sent to the operation panel 11 from various sensors attached to the main part of the plant is taken into the plant operating information monitoring device 15, and the taken operating information value is set and stored in advance as a value in normal operation. When comparing and detecting an abnormal value outside the range of normal operation, an alarm and an abnormal message are output to notify the operator. Further, the number of times of detected abnormal information and its duration are displayed so that the progress of the abnormal driving situation can be grasped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for monitoring abnormal operation of an asphalt plant for producing an asphalt mixture which is a road paving material.

[0002]

2. Description of the Related Art An asphalt plant is equipped with various sensors for detecting operating information of the plant such as temperature, measured value, and opening degree in its main part, and the signals detected by these sensors are incorporated into a control panel to produce the plant. The operation control is performed and the operation information is sequentially displayed on the screen. During plant operation, the operator of the plant constantly monitors the screen of the operation panel to see if any abnormal operating conditions occur.

[0003]

However, it has been a great burden for the operator to constantly monitor the screen of the operation panel during plant operation. In addition, a skilled operator can accurately grasp the overall operating condition from the operation information and correct the trajectory before falling into an abnormal operating condition, but an operator unfamiliar with driving can find it difficult to predict the abnormal operating condition. Response to may be delayed.

In view of the above points, it is an object of the present invention to provide an abnormal operation monitoring method for an asphalt plant, which monitors the operating state of the plant with an apparatus to reduce the burden on the operator.

[0005]

In order to achieve the above object, the present invention provides a plant operation panel for operating and controlling a plant based on operation information of the plant taken from various sensors attached to the main part of the plant. Equipped with a plant operation information monitoring device that monitors plant operation information, and the plant operation information monitoring device stores in advance the upper and lower limit values of the operation information during normal operation of the main part of the plant, and stores the plant information every predetermined time. When the operation information of the main part is taken in and the value exceeds the above-specified upper limit value,
Alternatively, when an abnormal value below the lower limit value is detected, an alarm and an abnormal message are output.

Further, when an abnormal value is detected in the operation information taken into the plant operation information monitoring device, the number of occurrences of the abnormality information and the duration of the abnormal state are integrated and output. .

[0007]

According to the present invention, the plant operation information monitoring device sets and stores the upper limit value and the lower limit value of the operation information during the normal operation of the main part of the plant in advance. This value is appropriately set based on the experience of the operator. The operation information of the main part of the plant sent from various sensors to the operation panel along with the operation of the plant is taken into the plant operation information monitoring device, and the operation information value exceeds the preset upper limit value during normal operation or the lower limit. It is judged whether the value is below the value or not, and when it is out of the normal value, an alarm and an abnormal message are output to inform the operator. As a result, the operator can respond appropriately without delay even if he / she does not constantly monitor the operation panel, which is convenient in operation and reduces the burden on the operator.

Further, if the number of occurrences of the abnormality information and the duration of the abnormal state are integrated and output, the operator can grasp the abnormal operation status of the plant more clearly, which helps the operation. .

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an asphalt plant equipped with the plant operation information monitoring device of the present invention, and the plant body is omitted. 1 is a dryer for heating and drying aggregate or waste material, which is a raw material of asphalt mixture,
The cylindrical drum 2 is rotatably supported on the machine base 3 by tilting,
A hot hopper 5 provided with a burner 4 for generating hot air is arranged at one end thereof, and a cold hopper 7 connected to an exhaust flue 6 for discharging high-temperature exhaust gas passing through the drum 2 is arranged at the other end thereof. ing. A bag filter 8 for capturing dust is disposed downstream of the exhaust flue 6, and an exhaust fan 9 for sucking the exhaust gas and a chimney 1 for discharging the exhaust gas to the atmosphere are further provided at the end thereof.
0 is set.

Reference numeral 11 denotes an operation panel for controlling the operation of the plant, which connects various sensors arranged in the main part of the plant through a transmission line. Examples of the sensors include a temperature sensor 12 for detecting hot air temperature in the hot hopper 5 of the dryer 1 for heating waste material, an exhaust gas temperature sensor 13 for detecting exhaust gas temperature in the exhaust flue 6, and a bag inlet for the bag filter 8. A large number of various sensors including a temperature sensor 14 and a plant body (not shown) such as a temperature sensor for detecting the temperature of the heated aggregate are disposed on the discharge side of the dryer 1. Hereinafter, the parts that detect the operation information of the plant by these sensors are collectively referred to as the operation information detection part A.

A plant operation information monitoring device 15 is connected to the operation panel 11, and the plant operation information monitoring device 15 controls and calculates the flow of various information.
And a storage unit 17 for storing various information, an input unit 18 for inputting setting values of various information, and a display unit 19 for displaying various information, and a printer 20 for outputting the aggregated information to the outside. The operation panel 11 is programmed so that necessary operating information is fetched and the operating status is monitored.

The procedure for monitoring the operating condition of the plant by the plant operation information monitoring device 15 will be described with reference to the flowcharts of FIGS. S1 to S15 in the figure represent steps of each procedure.

First, prior to plant operation, initial setting is performed to set upper and lower limits that can be said to be normal operating states of various operation information. As shown in FIG. 2, first, an operation information detection unit A that detects operation information of the plant such as temperature and current value in the main part of the plant is appropriately selected and input to the plant operation information monitoring device 15 from the input unit 18 and registered. Do (S
1). Next, the upper limit value and the lower limit value of the operation information at the time of normal operation in the selected operation information detection unit A are input and set from the input unit 18 and registered (S2). The upper limit value and the lower limit value of this operation information are values that are almost determined from the design concept of the plant, but a skilled operator can also appropriately determine them based on his / her own operating experience.

FIG. 4 shows an example of a screen displaying the monitoring situation. In this example, a caution value and an abnormal value can be set in addition to the common upper limit value and the common lower limit value. . And in this example, the lower limit of the bag inlet temperature is 1
The temperature is 00 ° C., the upper limit value is 170 ° C., and when the temperature is higher than that, the filter cloth of the bag filter 8 is adversely affected. As the value is set more finely in this way, the abnormal driving situation can be more closely monitored.

When the setting registration of the upper limit value and the lower limit value is completed, it is judged whether or not the registration procedure of the operation information detecting section A is completed (S3), and if registration is continued, step 1 (S).
By returning to 1) and repeating the above operation, the upper limit value and the lower limit value are set and registered for all the operation information of the main part desired to be monitored, and when that is completed, the process proceeds to END to complete the initial setting work.

Next, the procedure of monitoring the operating condition during plant operation will be described. As shown in FIG. 3, the operating information of the plant sent from the operating information detecting section A having each sensor attached thereto to the operation panel 11 is supplied for a predetermined time. Each time it is taken into the plant operation information monitoring device 15 (S4). Then, the loaded operation information value is compared with a preset value during normal operation (S5). It is determined whether the fetched operation information value exceeds the preset upper limit value of normal operation information or falls below the lower limit value to determine whether it is outside the normal range (S
6) If it is within the normal range, the process returns to step 4 (S4) to fetch the next operation information.

If the operation information value is out of the normal range, the time at that time is read (S7). Then, in order to call attention to the operator of the operation panel 11, an alarm and an abnormal message are sent (S8).

Further, it is judged whether or not the operation information value fetched this time is continuously out of the normal range from the previous time (S9), and if it is not continued from the previous time, 1 is added to the number counter ( S10). If the abnormal value continues from the previous time, the continuous time from the previous time is calculated (S11), and the continuous time is added to the time counter (S12). This abnormality information is displayed on the display unit 19 of the plant operation information monitoring device 15 in the layout as shown in FIG. 4 (S13). If the operation is further continued (S14), the procedure returns to step 4 (S4) to repeat the above procedure, and when the operation is completed, the number of times of occurrence of abnormality information so that the abnormal operation situation of one day can be confirmed later,
The necessary data such as the time of occurrence and the duration of the abnormal state are stored and the process ends (S15).

In this way, the plant operation information monitoring device 15
By using, even if the operator does not constantly monitor the screen of the operation panel 11, when an abnormal operation that deviates from the value of the operation information set by himself is started, an alarm and an abnormal message are output, so that the normal operation is performed. You can respond appropriately without delay to recover.

Further, since the number of occurrences of the abnormality information and the duration of the abnormal state are displayed together with the operation information value (measured value) on the display unit 19 of the plant operation information monitoring device 15, the progress of the abnormal operation is shown. It can be seen, and the progress can be predicted in the future, so that the operator can deal with it with a margin. For example,
A situation in which the current abnormal operation should be rapidly restored to normal operation by referring to the time during which the abnormal state continues and the trend of its operating information value (measured value) and also referring to the measured values of other operating information Whether or not it is preferable to slowly recover in order to maintain the uniformity of the product can be considered with a margin.

Further, after the operation is completed, the abnormal operation status of the day stored in the plant operation information monitoring device 15 can be output to the printer 20 to be used as plant management data.
Based on the management data, it is also possible to analyze how long the abnormal operating state has continued, whether there is any abnormality in the equipment, whether it is operating properly, etc. It will be useful for plant management.

As an example of screen output in this embodiment, as shown in FIG. 4, the normal upper limit value and the normal lower limit value of the operation information, as well as the caution value and the abnormal value are set, and these values are exceeded.
Alternatively, the number of times that the number of times is less than or equal to the duration is displayed, but the more detailed the setting, the easier it is to understand the driving situation, and the setting items are not limited. If the operation information is focused on, the lower limit value may not be set and only the upper limit value may be set. Further, although the number of times of occurrence of abnormal information and the duration of the abnormal state are integrated and both are displayed, only one of the number of times of occurrence of abnormal information or the duration may be displayed. Further, the plant operation information monitoring device 15 is connected to the operation panel 1
Although it is separately installed with respect to 1, the plant operation information monitoring device 15 may be incorporated in the operation panel 11, and various modifications may be made without departing from the scope of the present invention. is there.

[0024]

As described above, according to the present invention, the plant operation information monitoring device 15 is connected to the operation panel 11 for controlling the operation of the plant, and the operation information is sent to the operation panel 11 from each sensor attached to the main part of the plant. The operating information of the plant to be imported is taken into the plant operating information monitoring device 15 every predetermined time, and is compared with the preset upper and lower limit values of the operating information during normal operation, and the imported operating information is set to the upper limit of the operating information. And when an abnormal value out of the lower limit is detected, an alarm and an abnormal message are output to notify the operator, so that the operator can respond appropriately without delay even if the operation panel is not constantly monitored. The operation is convenient and the burden on the operator is reduced.

When an abnormal value is detected in the operation information fetched by the plant operation information monitoring device 15, the number of occurrences of the abnormality information and the duration of the abnormal state are integrated and displayed. Since the progress can be seen and the progress of the future can be predicted by this, the operator can deal with it with a margin and can strongly support the driving operation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an asphalt plant that employs a plant operation information monitoring device of the present invention.

FIG. 2 is a flowchart showing a procedure of initial setting of a plant operation information monitoring device.

FIG. 3 is a flowchart showing a monitoring procedure of a plant operation information monitoring device.

FIG. 4 is an example of a layout of a monitoring screen displayed on the plant operation information monitoring device.

[Explanation of sign]

DESCRIPTION OF SYMBOLS 1 ... Dryer 8 ... Bag filter 11 ... Operation panel 12 ... Hot air thermometer (sensor) 13 ... Exhaust gas thermometer (sensor) 14 ... Bug inlet thermometer (sensor) 15 ... Plant operation information monitoring device

Claims (2)

[Claims] 1. A plant operation information monitoring device for monitoring the operation information of the plant on a plant operation panel for controlling the operation of the plant based on the operation information of the plant fetched from various sensors attached to the main part of the plant, The plant operation information monitoring device stores and stores the upper limit value and the lower limit value of the operation information at the time of normal operation of the plant main part, fetches the operation information of the plant main part at every predetermined time, and the value is the upper limit set above. An abnormal operation monitoring method for an asphalt plant, which outputs an alarm and an abnormal message when an abnormal value exceeding a value or below a lower limit is detected. 2. When an abnormal value is detected in the operation information taken into the plant operation information monitoring device, the number of occurrences of the abnormality information and the duration of the abnormal state are integrated and output. The method for monitoring abnormal operation of an asphalt plant according to 1.