JPS6080016A - Burning control of refuse incinerator - Google Patents

Abstract

PURPOSE:To offer the automatically operable burning control with restraining the variation of evaporizing quantity due to the variation of refuse material by a method wherein the adjustment of treating speed is made by changing in cascade manner the objective setting value of a vaporizing quantity constant control device. CONSTITUTION:A crane refuse introducing quantity 1 is metered with a meter 11 provided on a crane 10. The crane refuse introducing quantity 1 is integrated with an introducing quantity integrating device 2, compared with a planning value for one day in an target comparator 3, the compared result is processed by various calculating with a treating quantity control device 4, then a vaporizing quantity target setting value 8 of a vaporizing quantity constant control device 6 is adjusted in cascade manner, accordingly, the variation of a vaporizing quantity 7 due to the variation of refuse material is restrained, whereby a steady treating quantity control system can be realized.

Description

[Detailed Description of the Invention] Conventionally, the primary purpose of operating a waste incinerator has been to process waste stably, and operators have operated the incinerator to achieve a daily throughput commensurate with the plant capacity. operation is being performed. Specifically, each time garbage is thrown into the furnace with a crane, it is weighed, and the furnace load settings are changed so that the cumulative value approaches the daily planned value. In addition, load changes can be made by manipulating the garbage supply speed and combustion air amount. However, the above operation requires experience and intuition, and there has been a demand for automation due to the trend of labor saving.

The present invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a waste incinerator throughput control method that enables automatic operation to achieve the planned throughput. , the measured value of the garbage input by the crane is saved and compared with the planned value, and the processing speed is adjusted based on the comparison result.In the case of an incinerator with a boiler, a constant evaporation amount control device is used, and in a furnace without a boiler, a constant temperature control device at the furnace outlet is used. It is an object of the present invention to provide a method for controlling combustion in a waste incinerator, which is performed by changing target set values of the device in a cascade manner.

By the way, throughput control in the present invention refers to adjusting the amount of waste to be processed per unit time, that is, the waste processing speed, in order to achieve the target amount of waste that the waste incinerator should process in one day. Specifically, the amount of waste fed into the furnace per unit time is adjusted, but if the feeder, which is the feeding device, is directly operated for this purpose, there is no guarantee that combustion in the furnace will be maintained stably. do not have. Furthermore, even if the stabilization is achieved by adding other control devices, the large fluctuations in waste quality will result in large fluctuations in the exhaust gas temperature or the evaporation amount of (( do not have.

Therefore, by detecting the exhaust gas temperature or boiler evaporation amount,
A control device is installed to operate the feeder to keep this constant, and this stabilizes the exhaust gas temperature or boiler evaporation amount.At the same time, if it becomes necessary to adjust the processing speed, the target setting values of these control devices can be adjusted. The processing speed can be arbitrarily set by indirectly controlling the feeder (this method of introducing a control system in a controlled manner is called cascade). Further, when the exhaust gas temperature control or the evaporation amount control is carried out, there is an advantage that stabilization of combustion can be obtained at the same time.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a waste incinerator for implementing the method of the present invention. 1st
In the figure, the amount of garbage input by the crane is measured by a measuring device 11''T installed on the crane 10.

The actual waste incineration rate is controlled by the speed of the feeder 12 and varies depending on the furnace outlet temperature or the evaporation amount of the attached boiler. In the figure, 13 is garbage and 14 is a garbage incinerator.

FIG. 2 shows a conventional throughput control system.

In Fig. 2, crane garbage input amount 1 is input amount integrator 2.
The target comparator 3 compares the calculated value with the planned value for the day, and the comparison result is subjected to various arithmetic processing by the throughput control device 4, and then the feeder speed 5 is adjusted. Note that even if the feeder speed 5 is constant, the furnace outlet temperature or boiler evaporation amount varies due to variations in waste quality. Therefore, if the feeder speed 5 is changed, the fluctuation becomes even more severe, and stable operation of the furnace may not be maintained.

Next, the embodiment system of the present invention shown in FIG. 3 will be explained.
In the case of FIG. 3, the throughput control device 4 does not directly adjust the feeder speed 5, but the evaporation constant control device 6
By adjusting the evaporation amount target set value 8 in a cascade manner, it is possible to suppress fluctuations in the evaporation amount 7 due to fluctuations in waste quality and realize a stable throughput control system. In addition,
In the present invention, if the constant evaporation amount control device 6, the evaporation amount 7, and the evaporation amount target setting value 8 are all set to the furnace outlet temperature, the present invention can be applied to incinerators other than the boiler 1 as is.

Since the present invention is configured as described above, it is possible to provide a combustion control method that can automatically perform operation while suppressing fluctuations in evaporation amount due to fluctuations in waste quality.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view, not showing an example, of a waste incinerator that implements the method of the present invention, Fig. 2 is an explanatory diagram of a conventional waste incinerator combustion control method, and Fig. 3 shows an embodiment of the present invention. FIG. 2 is an explanatory diagram of a garbage incinerator combustion control method. Explanation of the main parts of the diagram 1 - Crane garbage input amount 2 - Input amount integrator 3 - Target comparator 4 - Throughput control device 6 - Evaporation amount constant control device 7 - Evaporation amount 8 - Evaporation amount target set value 10 - Crane 12- Feeder 13- Garbage 14- Garbage incinerator

Claims (1)

[Claims] In the method for controlling the throughput of a waste incinerator, in a furnace with a boiler, the processing speed is adjusted by changing the target setting value of a constant evaporation control device in a cascade, and in a furnace without a boiler, the processing speed is adjusted. A combustion control method for a waste incinerator, characterized in that the adjustment is performed by changing a target setting value of a constant furnace outlet temperature control device in a cascade manner.