JPS591919A - Control method of combustion - Google Patents

Abstract

PURPOSE:To improve the discriminating accuracy of a combustion condition, by a method wherein, based on an image projected on a monitor a combustion condition in an incinerator is automatically discriminated, and this controls the combustion condition in the incinerator. CONSTITUTION:An image, being monitored from the rear of an incinerator through a television set 2 for industrial use and a digitalizer 3, is converted into a digital signal to output it to a computer 4. In the image, a stoker surface, inclining downward in the direction of the rear, is represented. In said system, a burning-off point during a normal operation is located in a position A, but when a fire retardant substance is supplied, the burning-off point moves downward to a position B. The condition is discriminated by an image processor, and when moving downward from the position A by a specified distance, a feeder 5 and a stoker 6 are temporarily brought to a stop to measure the surface combustion of a solid waste substance. When the position of the burning-off point restores to the standard position A, the feeder 5 and the stoker 6 start to operate again.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for automatically determining the combustion status in an incinerator using an image processing device when solid waste is burned in an incinerator, and thereby controlling the combustion.

Conventional methods for automatically controlling combustion in solid waste incinerators include measuring the amount of change caused by the substances burned in the incinerator2, such as the amount of evaporation in the boiler, the amount of gas cooling water, and the temperature of the gas at the outlet of the furnace. Controls such as changing the amount of combustion are performed.

Since this control method mainly controls the phenomena caused by the combustion of solids, it does not actually know the changes in the combustion state inside the furnace, and if something flame-retardant enters at 1 o'clock, ignition will occur. Unfortunately, combustion begins only when it reaches the rear of the furnace, resulting in a situation where unburned materials are discharged due to insufficient residence time.

Furthermore, in this case, the amount of evaporation etc. decreases until the start of combustion, and accordingly a large amount of the material to be incinerated is thrown into the furnace, resulting in excessive solid waste being thrown into the furnace.

The present invention was proposed for the purpose of solving the above-mentioned problems.In a solid waste incinerator, the combustion situation inside the incinerator is captured as an image using a television camera, and the image processing 5F
A combustion control method is provided, characterized in that automatic discrimination is made based on the position of the combustion engine, and the tweeter and stoker of the incinerator are controlled by the same image processing device.

In the method of the present invention, the combustion situation in the incinerator is captured as an image using a television camera, and the image is determined by an image processing device.
Movement of the combustion completion point (burning point λ・) and instability of combustion (the burning point is not uniform in the furnace, causing a situation where it burns at the top or burns at the bottom) The operation of combustion equipment and supply equipment is controlled depending on the degree of

Next, an embodiment in which the method of the present invention is applied to a stoker-type municipal waste incinerator will be described with reference to the drawings.

In Figure 1, the combustion situation inside the garbage incinerator is shown.

It is sent to the computer 4 as an image digital signal seen from the furnace diameter side through the industrial telegraph 2 and digitizer 6 installed on the rear surface of the furnace body 1, and the combustion status is determined here. control. 7 is a garbage input hopper.

The images are shown in FIGS. 2 and 3. The video shows the stoker surface tilted downward toward the rear, and the burnout point is at position A during steady operation.

When flame retardant material is supplied, the burnout point moves downward to position B. This situation is determined by an image processing device, and if the solid waste moves downward by a certain amount or more from the standard position A, the feeder and stoker are temporarily stopped and the solid waste is placed and burned.

When the burnout point returns to the standard position A, the feeder and stoker start operating again.

Furthermore, as shown in FIGS. 4 and 5, if unburned garbage continues to be supplied to position C, which is the second normal combustion source, a black portion will appear at position D. In this case, control is performed such that only the feeder is stopped and the stoker continues to operate.

As explained above with reference to the embodiments, the present invention automatically determines the combustion status in the incinerator using the image processing device based on the image displayed on the television monitor. This is designed to control the combustion status inside the furnace, dramatically improving the accuracy of determining the combustion status, and automating the first determination operation, making it extremely convenient.

The present invention can be applied to, for example, incinerators for municipal waste, industrial waste, and the like.

[Brief explanation of the drawing]

Figure $1 is a schematic diagram showing one embodiment of the method of the present invention. Figures 2 to 5 are diagrams schematically showing images showing the combustion situation inside the incinerator. 1...Incinerator body, 2...Industrial television, 6...
Digitizer, 4... Computer, s-... Feeder, 6
...stalker. Skull 2 Flash Skull 3

Claims (1)

[Claims] In a solid waste incinerator, the combustion status inside the incinerator is captured as an image using a television camera, the image processing device automatically identifies the situation, and the image processing device controls the incinerator's tweeter and stoker. Combustion control method.