JPH07208718A - Waste disposal facility - Google Patents

Abstract

PURPOSE:To permit incinerating disposal as planned even when the wastes to be incinerated are different very much in the easiness of combustion, and prevent the generation of reverse response phenomenon due to the excessive throwing of the waste to be incinerated. CONSTITUTION:The flow rate of cooling water for cooling waste gas during operation is detected and when the flow rate of the cooling water is more than a predetermined flow rate, the speed of a waste supplying machine is determined by dividing remaining amount of waste to be incinerated during an appointed day by the remaining operation time during the appointed day while the speed of the waste supplying machine is reduced to a predetermined speed when the flow rate of the cooling water is less than the predetermined flow rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment facility for incinerating municipal waste, industrial waste, sludge and the like,
The present invention relates to operation control means of the incinerator.

[0002]

2. Description of the Related Art There are various types of incinerated substances that are put into a waste treatment facility, such as municipal waste, industrial waste, and sludge. The quality of the refuse, that is, the low calorific value (LHV), etc. Are significantly different. Therefore, in order to maintain the incineration device in a good combustion state, it is necessary to correctly grasp the quality of the refuse to be incinerated during operation. However, since it is difficult to accurately grasp the quality of waste, the conventional waste treatment equipment is operated based on the experience of workers.

[0003]

The operation of the conventional waste treatment equipment is as described above, but the quality of the refuse incinerated during the operation is often changed and the combustion state is often changed.
It was difficult to operate so that the amount of waste disposal would be as planned. In addition, when the amount of waste input was increased when the combustion condition deteriorated, it was said that the inverse response phenomenon such that the combustion condition rather deteriorated may occur because the input material was high in water content. There were challenges.

The present invention has been made in order to solve the above-mentioned problems, and even incinerators that greatly differ in calorific value and flammability represented by low calorific values such as sludge and industrial waste, It is an object of the present invention to obtain a waste treatment facility that can incinerate as planned and can prevent the occurrence of a reverse response phenomenon due to excessive input of incineration materials.

[0005]

The waste treatment facility according to the present invention detects the flow rate of cooling water that cools the exhaust gas discharged from the waste treatment facility during operation, and the flow rate of this cooling water is predetermined. When the flow rate is higher than the flow rate, the remaining amount of incineration to be processed during the day is divided by the remaining operating time on the day to determine the speed of the duster, and when the flow rate of the cooling water is less than the specified flow rate, the dust is discharged. The machine speed is reduced to a predetermined speed.

[0006]

The flow rate of the cooling water for cooling the exhaust gas is detected during the operation of the waste treatment facility according to the present invention, and when the flow rate of the cooling water is equal to or higher than the predetermined flow rate, it is determined that the combustion state is good. Therefore, if the speed of the dust collector is determined by dividing the remaining incineration amount to be processed during the day by the remaining operating time on the day, it is possible to operate so as to achieve the planned waste processing amount. Also, if the flow rate of the cooling water is less than the predetermined flow rate, it is determined that the combustion state has deteriorated, so if the speed of the dust collector is reduced to the predetermined speed, the absorption of heat by the injected dust will be small. The temperature inside the furnace rises and the combustion state is restored. When the temperature rises, the flow rate of the cooling water becomes a predetermined flow rate or more, and the speed of the dust feeder can be determined as described above to achieve the waste disposal amount as planned.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a flow chart of operation control operation of a waste treatment facility according to an embodiment of the present invention, FIG. 2 is an operation control system diagram thereof,
FIG. 3 is a conceptual diagram of waste treatment equipment. As shown in FIG. 3, as the input that is input or sent to the incinerator of the waste treatment facility, there are incinerated substances such as sludge and industrial waste, and combustion air is sent in order to burn them. , Cooling water is sent in to alleviate overheating of the furnace top and flues. Outputs from the incinerator include ash and combustion gases. In this waste treatment facility, as shown in FIG. 3, the temperature of the combustion gas is detected by TIC, and a large amount of cooling water is made to flow when the temperature is high, and a small amount of cooling water is made to flow when the temperature is low. In addition, the cooling water flow rate control valve is operated. The flow rate of the cooling water is detected by a flow meter, the information is taken into a control device, and the control device is configured to control the amount of sludge, industrial waste, etc. to be incinerated into the furnace.

Next, the operation control operation of this waste treatment facility will be described with reference to FIG. The control device starts after confirming that this waste treatment facility enters into steady operation and each temperature control is stable. First, the amount of cooling water used to cool the exhaust gas (flow rate) is detected. If the cooling water flow rate is not decreasing, that is, if it is above the predetermined flow rate, it is judged that the quality of the waste is high or there is no change and the combustion state is good, and Determine the speed of the duster by dividing by the remaining operating time of the day, and operate at the optimum incineration amount.

In FIG. 1, when the flow rate of the cooling water is detected and the flow rate of the cooling water is less than the predetermined flow rate, the quality of dust is reduced, the combustion state is deteriorated, and the temperature of the sand layer is also reduced. Therefore, the primary air amount is increased and the speed of the dust feeder is reduced. Then, the heat absorption of the input dust is reduced, the combustion state is recovered, and the temperature in the furnace rises. Along with that, the amount of cooling water also tends to increase. As mentioned above,
The flow rate of the cooling water is detected at a predetermined timing, and if the flow rate is equal to or higher than the predetermined flow rate, operation is performed at the optimum incineration amount. If the flow rate is lower than the predetermined flow rate, the speed of the dust feeder is reduced to restore the combustion state. By repeating this control operation until the end of the operation, it is possible to perform the operation as planned while preventing the occurrence of the reverse response phenomenon.

Next, the operation control system shown in FIG. 2 will be described. The amount of waste input indicated by WIRQ503 is calculated from the crane scale. Add the unburned amount of the previous day to the planned incinerated amount per day, and subtract the accumulated amount of the waste input. This calculated amount is the amount of waste to be processed today, and this value is input to LSLCT. On the other hand, a moving average of the amount of waste input in 1 to 2 hours was calculated, and the amount of input waste (t / h)
Multiply by the remaining driving time of today to calculate the amount of waste that can be processed at the current pace. The required duster speed is calculated by dividing the amount of refuse to be processed today calculated as described above by the remaining operating time. This calculated command signal is sent to the dust collector speed setting device by the ACC 102.

In FIG. 2, the flow rates of cooling water for cooling the furnace top and the gas cooling chamber are detected by FIQ 105 and FIQ 107, and a moving average is taken every 30 minutes. The flow rate of the top cooling water is multiplied by a predetermined coefficient k to calculate the average of both flow rates. This is input to the converter as x, y is output, and this signal y
Is sent to the dust collector speed setter by ACC102. The relationship between x and y is set in the converter as shown by a curve, and the signal y increases the dust collector speed when the cooling water flow rate x is equal to or more than a predetermined value, and the cooling water flow rate x Is less than a predetermined value, the dust collector speed is set to be reduced. As shown in FIG. 3, for example, when the sludge and the industrial waste are provided with separate dusters, the control of the speed of the duster with respect to the change in the cooling water amount is performed by adjusting the amount of the incombustible sludge to be input. It may be configured to control.

FIG. 4 is a low heating value (LHV) indicating the quality of waste.
The change of the cooling water flow rate with respect to the change of is shown. As the low calorific value of the incineration waste increases, the temperature inside the furnace and the temperature of the exhaust gas rise, so the flow rate of cooling water increases linearly. That is, when the cooling water flow rate is large, it indicates that the combustion state is good, when the cooling water flow rate is small, it indicates that the combustion state has deteriorated, and when the cooling water flow rate is large, the flame-retardant incinerator is shown. It can be said that the above-mentioned control operation for increasing the input amount of the above and decreasing the input amount of the flame-retardant incinerator when the cooling water flow rate is small is appropriate.

[0013]

As described above, according to the present invention, the flow rate of cooling water is detected, and if the flow rate is equal to or higher than the predetermined flow rate, the optimum incineration amount is input, and if the flow rate is lower than the predetermined flow rate, the input amount is reduced. Therefore, it is possible to prevent the occurrence of a reverse response and always operate in a good combustion state, and to incinerate as planned.

[Brief description of drawings]

FIG. 1 is a flow chart showing a control operation of a waste treatment facility according to an embodiment of the present invention.

FIG. 2 is an operation control system diagram of a waste treatment facility according to an embodiment of the present invention.

FIG. 3 is a conceptual diagram of a waste treatment facility according to an embodiment of the present invention.

[Fig. 4] Fig. 4 is a diagram showing the relationship between the quality of waste and the flow rate of cooling water in waste treatment equipment.

Claims (2)

[Claims] 1. A flow rate of cooling water for cooling exhaust gas discharged from the waste treatment facility is detected during operation of the waste treatment facility for incinerating the waste, and the flow rate of the cooling water is equal to or higher than a predetermined flow rate. Then, determine the speed of the duster by dividing the remaining amount of incineration to be processed during the day by the remaining operating time on the day,
A waste treatment facility, wherein the speed of the dust feeder is reduced to a predetermined speed when the flow rate of the cooling water is less than a predetermined flow rate. 2. While operating a waste treatment facility that incinerates waste, determine the speed of the duster by dividing the remaining amount of incineration to be treated during the day by the remaining operating time on the day,
A duster that detects the flow rate of cooling water that cools the exhaust gas discharged from this waste treatment facility and, when the flow rate of this cooling water is greater than or equal to a predetermined flow rate, inputs a predetermined flame-retardant waste to be incinerated. Is increased to a predetermined speed, and when the flow rate of the cooling water is less than the predetermined flow rate, the speed of the duster for charging the flame-retardant waste is reduced to the predetermined speed. Waste treatment facility.