JPS60228813A - Trouble shooting process of waste incinerating plant - Google Patents

Abstract

PURPOSE:To enable to shoot the troubles of appliances by a method wherein data obtained by running an device under the same conditions for a certain period of time are compared with one another. CONSTITUTION:A waste incinerating plant is run by an automatic combustion device for several hours once for a certain period of time at least under the conditions such as the same steam calorific value, the same disposing amount of waste, the same amount of exhaust gas or a certain load at the designed maximum load in order to compare the obtained data of respective constituent apparatuses with one another. In other words, when data are collected, said data are compared with the various data of the past (data of one week before, data of one month before, mean data for the last one year and mean data at test running) by the amounts of pattern of difference. In the amount of pattern of difference is equal to or more than the reference deviation, the trouble shooting is started. Thus, the secular changes of the respective constituent apparatuses of the waste incinerating plant is correctly grasped, resulting in enabling to shoot the troubles of the constituent apparatuses.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a method for diagnosing failures in waste incineration plants.

The structure of the conventional example and its problems Since waste materials such as cities and buildings are composed of miscellaneous materials, the amount of steam generated by incinerating them or burning pyrolysis gas generally fluctuates. It is true. Furthermore, the amount of waste to be processed per unit time is usually not constant. Therefore, since the operating conditions of the various data obtained during each operation are not constant, it is difficult to understand the aging of each component even when compared, and there is a problem that it cannot be used for failure diagnosis.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a method for diagnosing a failure of a waste incineration plant, which solves the above-mentioned conventional problems.

Structure of the Invention In order to achieve the above object, the fault diagnosis method for a waste incineration plant of the present invention involves operating an automatic combustion device at a constant load for several hours, and comparing all the data obtained from each component. This system is configured to diagnose failures in each of the above-mentioned component devices, thereby making it possible to accurately understand secular changes in each component device of the waste incineration plant and diagnose failures in these component devices. It is something.

Embodiment and Function An embodiment of the method of the present invention will be described below with reference to the drawings.

First, in the method of the present invention, an automatic combustion device is used to operate a waste incineration plant under certain conditions for a certain period of time (for example, one week).

As an automatic combustion device, for example, in the case of a stoker furnace, it has been publicly known in Japanese Patent Publication No. 7385-1985, Japanese Patent Publication No. 17286-1986, Japanese Patent Publication No. 1523-1983, etc., but conventionally, it was only used to stabilize combustion or It was only used to stabilize the amount of steam generated per day, and its main purpose was to process waste according to the amount of waste generated.

Therefore, the method of the present invention is used to operate a waste incineration plant under certain conditions using this automatic combustion device.

For operation under certain conditions, at least the same amount of steam generation,
The same amount of waste to be treated, the same amount of exhaust gas, or a constant load at the planned maximum load, for example, a constant load of 70 to 105% for a certain period of time, for example 3 to 105%.
^ I drive for 6 hours. When incinerating waste consisting of miscellaneous components such as garbage, it is relatively easy to keep the amount of generated steam within ±3% of the set value through automatic operation. However, even if the combustion condition in the furnace is stable as a whole, the average residence time in the furnace is 1.5 to 2.5 hours and some sudden combustion occurs, so in order to compare the data, it is necessary to 3 to 6 hours of operation is required. In addition, in order to compare the capacities of each component of the waste incineration plant, it is necessary to perform the comparison at a constant load of 70 to 105% of the planned maximum load as described above. It is most desirable for data comparison to calculate the planned maximum load using the amount of steam generated by the waste heat boiler, but in the case of a water injection type gas cooling type that does not have a waste heat boiler, it is calculated by multiplying the amount of waste processed by the estimated exothermic wax. Estimated human heat from the furnace can be used instead.

Next, the data of each component device obtained through such operation is compared to diagnose a failure of each component device. For example, −
Diagnosis when driving once a week under certain conditions as described above is useful in the following ways.

(1) Motor ammeter 'Ft fi value (A)■
Increased ammeter current value of JK machine through induction 1i) There is a high possibility that air is leaking due to the tact hole and the gas amount is increasing. In this case, if the amount of 02 in the exhaust gas changes,
It is possible to calculate the amount of leaked air.

■Pump ammeter current value increased (i) Scaling in the piping has increased and the discharge pressure has increased due to a slight blockage, and the ammeter current value has increased.

(2) Changes in vibration patterns and heat generation in the bearings of the rotating body ■ Same wave number analysis allows us to determine the imbalance of the rotating body, bearing wear, lack of lubricating oil, etc. using a known measuring instrument, and the extent of the deterioration of the situation can be determined. The time for replacement can be estimated.

■The heat generated by the bearing can be used as proof of ■.

(3) In the case of constant evaporation operation, it is possible to estimate the amount of waste processed, the amount of ash, the amount of harmful gases, the calorific value of the finished product, the seasonal changes in properties, and the natural changes.

(4) Fluctuation in released gas from an air-type vacuum condenser for steam cooling The increase in the amount of released gas indicates the amount of air leaking due to a hole in the condenser tube, and the time to repair the hole can be determined.

(5) Changes in the combustion chamber temperature pattern (longitudinal direction of the grate, height direction of the combustion chamber) Changes in the combustion pattern on the grate (deterioration of the longitudinal pattern of the grate due to fluctuations in the ignition position of garbage, combustion center, gasification combustion By changing the height direction pattern of the combustion chamber due to rise and fall, it is possible to understand changes in the calorific value and properties of waste, and to change automatic operation constants for optimization of III conversion.

In addition, if the occurrence of bright flame increases, it can be seen that there is a partial blow-through of air due to wear of the grate.
The amount of wear on the grate can be estimated.

FIG. 1 shows an example of a comparison pattern. That is,
If you use Gator, its data and various past data (
Compare the amount of pattern difference between - data from a week ago, data from before the injury, average data from the previous year, and average data at the time of test run. In the figure, (ΔQ) indicates the standard deviation value. If the pattern difference amount is the same as or larger than the standard deviation value, failure diagnosis is started.

Figure 2 shows how the data is compiled. In other words, since it is not possible to compare all of the huge amount of data with newly obtained data, typical data is created by averaging the data monthly, seasonally, and yearly. This makes it possible to reduce storage capacity and comparison time.

It goes without saying that the above diagnostic method can be applied to a pyrolysis treatment plant.

Effects of the Invention According to the present invention, it is possible to accurately grasp aging of each component of a waste incineration plant and diagnose failures in these components.

[Brief explanation of drawings]

The drawings are for explaining one embodiment of the method of the present invention.
FIG. 1 and FIG. 2 are work procedure diagrams, respectively.

Claims (1)

[Claims] 1. Run a waste incineration plant using an automatic combustion device once every certain period for at least several hours at the same amount of steam generation, the same amount of waste treated, or the same amount of exhaust gas, or a constant load at the planned maximum load. 1. A method for diagnosing a failure of a waste incineration plant, which comprises diagnosing a failure of each component by operating the component and comparing data obtained from the operation.